PHANTOM PHTM2136C Combi Boiler Water Heater Instruction Manual

PHTM2136C Combi Boiler Water Heater

Product Information

The PHTM II Combi is a boiler designed for residential use. It
is capable of providing both heating and domestic hot water. This
product is listed by the Massachusetts Board of Plumbers and Gas
Fitters and meets all necessary approval codes for installation in
Massachusetts. It is important to note that the installation,
servicing, and repair of this boiler should only be carried out by
a qualified heating installer or service technician to ensure
safety and proper functioning.

Specifications

• Model Number: PHTM II Combi
• Serial Number: [Insert Serial Number]

Important Safety Information

! WARNING: This boiler must only be installed, serviced, or
repaired by a qualified heating installer or service technician.
Improper installation, adjustment, alteration, service, or
maintenance can cause severe personal injury, death, or substantial
property damage. It is crucial to read and follow the instructions
provided carefully before installing the boiler.

Product Usage Instructions

1. Installer Read Before Proceeding: This section provides
important information and guidelines for the heating installer or
service technician. It covers topics such as installation
procedures, safety precautions, and troubleshooting.

2. Homeowner Read Before Proceeding: This section is intended
for homeowners and provides information on operating, maintaining,
and troubleshooting the PHTM II Combi boiler. It is recommended to
retain these instructions for future reference and to contact a
heating installer or technician for any issues or support.

3. Specifications: This section outlines the model number and
serial number of the boiler. These details may be required when
seeking information or support.

4. How It Works: This section explains the functioning of the
PHTM II Combi boiler and provides an overview of its components and
controls.

5. Locating Boiler: This section provides guidance on the proper
location for installing the boiler, taking into consideration
factors such as ventilation, access, and clearances.

6. Preparing Boiler: This section covers the necessary steps to
prepare the boiler for installation, including unpacking,
inspecting, and assembling components.

7. General Venting: This section provides instructions on
venting the boiler properly to ensure the safe discharge of
combustion gases.

8. Sidewall Direct Venting: This section explains the procedure
for sidewall direct venting, which allows for venting the boiler
through an exterior wall.

9. Vertical Direct Venting: This section provides instructions
for vertical direct venting, which involves venting the boiler
vertically through the roof.

10. Heating System Piping: This section covers the piping
requirements for connecting the boiler to the heating system,
including the use of expansion tanks and pressure relief
valves.

11. Domestic Water Piping: This section explains the piping
requirements for connecting the boiler to the domestic water
supply, including the installation of backflow prevention
devices.

12. Gas Piping: This section provides guidelines for gas piping,
including sizing, materials, and connections.

13. Field Wiring: This section covers the electrical wiring
requirements for the boiler installation.

14. Condensate Disposal: This section explains how to properly
dispose of condensate generated by the boiler.

15. Start-up and Checkout: This section provides instructions
for starting up the boiler and performing a thorough checkout to
ensure proper operation.

16. Operation: This section explains how to operate the PHTM II
Combi boiler, including temperature settings, control panel
functions, and maintenance recommendations.

17. Before Leaving Jobsite: This section provides a checklist of
tasks to be completed before leaving the installation site.

18. Service and Maintenance: This section outlines the
recommended service and maintenance procedures for the boiler,
including regular inspections and cleaning.

19. Troubleshooting: This section provides a troubleshooting
guide to help diagnose and resolve common issues that may arise
with the boiler.

20. Internal Wiring Diagrams: This section includes detailed
wiring diagrams for reference during installation or
troubleshooting.

21. Service Parts: This section provides a list of service parts
and their corresponding part numbers.

Appendix A. Combination Refrigeration/Heating System: This
appendix provides additional information on using the PHTM II Combi
boiler in combination with a refrigeration system.

Appendix B. Water Quality and Boiler Additives: This appendix
covers water quality requirements and the use of boiler additives
to prevent corrosion and scale buildup.

Appendix C. Special Requirements In Massachusetts: This appendix
outlines any special requirements specific to the installation of
the PHTM II Combi boiler in Massachusetts.

Appendix D. Code Required Text: This appendix includes
code-required text that may need to be included in documentation
related to the boiler installation.

Installation, Operating and Service Instructions for

Models: · PHTM2136C · PHTM2200C

Manual Contents

Page

1. Installer Read Before Proceeding . . . . . . . . . . .3

2. Homeowner Read Before Proceeding. . . . . . . .5

3. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .6

4. How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

5. Locating Boiler . . . . . . . . . . . . . . . . . . . . . . . . .10

6. Preparing Boiler . . . . . . . . . . . . . . . . . . . . . . . .14

7. General Venting . . . . . . . . . . . . . . . . . . . . . . . . .17

8. Sidewall Direct Venting. . . . . . . . . . . . . . . . . . .24

9. Vertical Direct Venting . . . . . . . . . . . . . . . . . . .30

10. Heating System Piping . . . . . . . . . . . . . . . . . . .36

11. Domestic Water Piping . . . . . . . . . . . . . . . . . . .39

12. Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

13. Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

14. Condensate Disposal . . . . . . . . . . . . . . . . . . . .46

15. Start-up and Checkout . . . . . . . . . . . . . . . . . .47

16. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

17. Before Leaving Jobsite . . . . . . . . . . . . . . . . . .65

18. Service and Maintenance . . . . . . . . . . . . . . . . .66

19. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .71

20. Internal Wiring Diagrams . . . . . . . . . . . . . . . . .86

21. Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Appendix A. Combination Refrigeration/Heating System . .95 B. Water Quality and Boiler Additives . . . . . . . . .96 C. Special Requirements In Massachusetts . . . .97 D. Code Required Text . . . . . . . . . . . . . . . . . . . . . .99

II · Combi Boiler/Water Heater · Condensing · Direct Vent · Gas Fired
TO THE INSTALLER:
Affix these instructions adjacent to boiler. Provide model number and serial number when seeking information and support.
TO THE HOMEOWNER:
Retain these instructions for future reference. Contact heating installer or technician for all issues and support.

! WARNING
This boiler must only be installed, serviced, or repaired by a qualified heating installer or service technician. Improper installation, adjustment, alteration, service or maintenance can cause severe personal injury, death, or substantial property damage. For assistance or additional information, consult a qualified installer, service agency, or the gas supplier. Read these instruction carefully before installing.

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
The Massachusetts Board of Plumbers and Gas Fitters has listed the PHTM II Boiler. See the Massachusetts Board of Plumbers and Gas Fitters website for the latest Approval Code or ask your local Sales Representative. The Commonwealth of Massachusetts requires this product to be installed by a licensed Plumber or Gas fitter.

The following terms are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to important information concerning product life.

! DANGER
Indicates a hazardous situation that, if not avoided, will result in death or serious injury.

! CAUTION
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

! WARNING
Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

NOTICE: Indicates special instructions on installation, operation, or service which are important but not related to personal injury hazards.

! DANGER
Explosion Hazard. DO NOT store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.
If you smell gas vapors, DO NOT try to operate any appliance – DO NOT touch any electrical switch or use any phone in the building. Immediately, call the gas supplier from a remotely located phone. Follow the gas supplier’s instructions or if the supplier is unavailable, contact the fire department.
! WARNING
This boiler must only be serviced and repaired by qualified installer, service agency or gas supplier.
· If any controls are replaced, they must be replaced with identical models. · Read, understand and follow all the instructions and warnings contained in all the sections of this
manual. · If any electrical wires are disconnected during service, clearly label the wires and assure that the wires
are reconnected properly. · Never jump out or bypass any safety or operating control or component of this boiler. · Assure that all safety and operating controls and components are operating properly before placing
the boiler back in service. · Annually inspect boiler. · Annually inspect all vent gaskets and replace any exhibiting damage or deterioration.

2

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PHTM II Combi Installation, Operating & Service Instructions
1 Installer or Qualified Service Agency Read Before Proceeding

! WARNING
Asphyxiation Hazard, Burn Hazard, Electrical Shock Hazard.
· Carefully read all instructions in literature packet and posted on boiler before attempting installation, startup, or service of this boiler. Perform steps in order given. Failure to follow all instructions in proper order could result in severe personal injury, death or substantial property damage.
· Use proper personal protective equipment when installing, servicing, or working near this boiler. Materials of construction, flue products, and fuel contain alumina, silica, heavy metals, carbon monoxide, nitrogen oxides, and/or other toxic or harmful substances that can be hazardous to health and life and that are known to the State of California to cause cancer, birth defects, and other reproductive harm.
· Do not disconnect pipe fittings on boiler or in heating system without first verifying system is cool and free of pressure and that your clothing will protect you from a release of hot water or steam. Do not rely solely on boiler temperature and pressure gage when making this judgement.
· Install all guards, cover plates, and enclosures before leaving boiler in operation.
· Disconnect electrical supply before installing or performing maintenance.
· Always use a combustion analyzer to verify proper operation. See Section 15 Start-up and Checkout for procedure and guidelines for checking carbon monoxide (CO) levels. Failure to use a combustion analyzer could cause operation of boiler with elevated (CO) levels, resulting in severe personal injury, death or substantial property damage.
· Do not install at altitudes above 2,000 ft. (610 m).

NOTICE: Size boiler properly relative to design heat load or, if using DHW priority, the peak hot water load, whichever is larger. A grossly oversized boiler will cycle excessively leading to premature failure of boiler and its components. Warranty does not cover damage from excessive cycling.
· For heating systems employing convection radiation (baseboard or radiators), use an industry accepted sizing method such as the I=B=R Guide RHH published by the Air Conditioning, Heating and Refrigeration Institute (AHRI).
· For new radiant heating systems, refer to radiant tubing manufacturer’s boiler sizing guidelines.
· For system including indirect water heater, ensure boiler has output called for per indirect water heater manufacturer’s instructions.
1. Phantom II Combi boiler is a Direct Vent combination space heating and DHW heating boiler.
2. A hot water boiler installed above radiation level or as required by the authority having jurisdiction must be provided with a low water cutoff (LWCO) device. This boiler is equipped with a UL353 listed flow switch which provides low water protection on this boiler. Where authority having jurisdiction requires a separate LWCO, the following kits are available:
· Auto reset LWCO: 105591-01
· Manual reset LWCO: 108182-01
Factory installed flow switch in this boiler meets requirements of 248 CMR 5.00 Massachusetts Amendments to NFPA 54 Section 5.10(6) 10.3.5 Safety Control.
3. Inspect shipment carefully for signs of damage. See Figure 6-1 for location of parts shipped loose with boiler. Any claim for damage or shortage in shipment must be filed immediately against carrier by consignee. No claims for variances or shortages will be allowed by boiler manufacturer, unless presented within 60 days after receipt of equipment.
NOTICE: When replacing control, use boiler control service part listed in Section 21 Service Parts. Boiler control service part is compatible for all models. Factory installed control is only compatible with purchased boiler.

110331-03 – 1/22

3

DATE

PHTM II Combi Installation, Operating & Service Instructions
SERVICE RECORD
SERVICE PERFORMED

4

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
2 User/Homeowner Read Before Proceeding

! WARNING
Asphyxiation Hazard. Fire Hazard. · A qualified installer, service agency or gas supplier should annually inspect boiler including annually inspecting all vent gaskets and replacing any exhibiting damage or deterioration. · If you are not qualified to install or service boilers, do not install or service this one. · Carbon monoxide is an odorless, deadly gas that may be introduced into your home by any malfunctioning fuel burning product or vent system failure. It is strongly recommended that CO alarms be installed near bedrooms and on all levels of building to warn you and your family of potential CO exposure. · Do not block air flow into or around boiler. Insufficient air may cause the boiler to produce carbon monoxide or start a fire.
! CAUTION
Burn Hazard. Keep children and pets away from hot surfaces of the boiler including boiler piping, vent piping, and vent terminals.
NOTICE: Boiler may leak water at the end of its useful life. Be sure to protect walls, carpets, and valuables from water that could leak from boiler.

! DANGER
HOT
BURN
· Water temperature over 125°F (52°C) can cause severe burns instantly or death from scalds.
· Under certain conditions, this boiler can deliver hot water (DHW) at temperatures in excess of the DHW set point on boiler control.
· Children, disabled and elderly are at highest risk of being scalded.
· Feel water before bathing or showering. · Installation of an ASSE 1017 or ASSE 1070
certified tempering valve is REQUIRED as part of this boiler’s installation. See Section11 Domestic Water Piping and authority having jurisdiction for additional details. · Additional temperature control valves may also be required at fixtures. See Section 11 Domestic Water Piping and authority having jurisdiction for additional details.
NOTICE: Protect your home in freezing weather. A power outage, safety lockout, or component failure will prevent your boiler from lighting. In winter your pipes may freeze and cause extensive property damage. Do not leave heating system unattended during cold weather unless alarms or other safeguards are in place to prevent such property damage.

110331-03 – 1/22

5

3 Specifications

PHTM II Combi Installation, Operating & Service Instructions

Table 3-1: Ratings

Space Heating Ratings

Domestic Hot Water (DHW) Ratings1

Model Number
PHTM2136C PHTM2200C

Input2 (MBH) Min Max

DOE AHRI Heating Net Capacity Rating3 (MBH) (MBH)

AFUE

13.6 120 112

97 95.0

20 150

141

123 95.0

Input2 (MBH)
Min Max
13.6 136 20 200

Hot Water Draw Limits GPM (L/min)2

Max

70°F (39°C) Rise

77°

90°F

Min4

(43°C) (50°C)

Rise

Rise

3.7 (14) 3.4 (13) 2.9 (11) 0.5 (2)

5.2 (19.6) 4.7 (17.8) 4.0 (15) 0.5 (2)

1 DHW ratings are not AHRI certified. 2 Input and DHW draw limits for elevations up to 2,000 ft. (610 m) with min vent length. See Table 3-3 for derate at
max vent length. 3 Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. The manufacturer should
be consulted before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent operation, extensive piping systems, etc. 4 Min DHW flow rate required through boiler to initiate DHW demand. Higher flow rate through fixture may be require due to mixing at tempering valve and/or fixture itself.

Table 3-2: Dimensions and Connections

Model Number

Depth in. (mm)

Width in. (mm)

Height in. (mm)

Space Heating Water sweat, in.

Domestic Water
sweat, in.

Gas NPT

Relief Valve NPT

Maximum Allowable Working Pressure psig (kPa)

PHTM2136C 16.3 (413) 17.8 (453) 29.8 (757) 1-1/4

3/4

1/2

3/4

50 (345)

PHTM2200C 20.4 (518) 17.8 (453) 29.8 (757) 1-1/4

3/4

1/2

3/4

50 (345)

Table 3-3: Air Intake and Vent Lengths

Model Number PHTM2136C PHTM2200C

Intake/Vent Size in. (mm)

Standard w/ increaser
Standard w/ increaser

2 (60) 3 (80) 2 (60) 3 (80)

Min Length ft. (m)
2.5 (0.76) 2.5 (0.76) 2.5 (0.76) 2.5 (0.76)

Max Length ft. (m)
70 (21.3) 135 (41.1) 70 (21.3) 135 (41.1)

Approx. Derate at Max. Length (%)
7 1 9 5

Table 3-4: Inlet Gas Pressure Range

Min in. wc (kPa)

Natural Gas

2.5 (0.62)

LP Gas

8.0 (1.99)

Max in. wc (kPa) 14.0 (3.48)

6

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3 Specifications (continued)

PHTM II Combi Installation, Operating & Service Instructions

Table 3-5: Weights and Volume

Model Number

Shipping Weight lb (kg)

Empty Boiler Weight lb (kg)

Shipping Crate D in. (mm)

Shipping Crate W in. (mm)

Shipping Crate H in. (mm)

Water Content gal (L)

Heat Exchanger
Surface Area
ft.2 (m2)

PHTM2136C 112 (51)

95 (43) 41.4 (1050) 20.0 (508) 18.3 (465) 1.0 (3.8) 11.99 (1.11)

PHTM2200C 135 (62)

116 (53) 41.4 (1050) 20.0 (508) 22.3 (567) 1.3 (4.9) 17.98 (1.67)

Electrical Requirements: 120 VAC, 60 Hz, 1-ph. 1.6A for boiler and internal pump + current draw of any external pumps connected to boiler. Controls: Boiler flow switch and integrated manual reset high limit provided with boiler are both UL-353 listed. LP Gas Conversion: Boiler is shipped from factory configured for natural gas and is field convertible to LP gas. See Section 15 Start-up and Checkout for instructions to convert to LP gas. Altitude: Boiler is listed for 0 to 2,000 ft. (610 m). Do not install above 2,000 ft. (610 m).

Safety Relief Valve

Vent Connector
Air Intake

Front View

Low Voltage Knockouts

120 VAC Knockouts

Gas
Boiler Supply
Domestic Hot Water Outlet

Bottom View

Domestic Cold Water Inlet
Boiler Return Combi Block Drain (hydronic side) Condensate Trap Cleanout
Condensate Drain

Figure 3-6: Boiler Connections

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7

4 How It Works

PHTM II Combi Installation, Operating & Service Instructions

1. Heat exchanger Water flows through heat exchanger’s stainless steel tubes. Heat is transferred to water as flue products are cooled below point of condensation for maximum heat transfer and efficiency. An enclosure contains and directs flue products to vent piping.
2. Blower Pulls air and gas through venturi. Air and gas mixture is then pushed into burner where it burns inside combustion chamber.
3. Gas valve Precisely controls gas flow rate in response to electronic signal from control.
4. Venturi Creates suction at gas valve outlet and mixes air and gas before they flow into blower.
5. Burner (not shown) Constructed of stainless steel, burner uses pre-mixed air and gas to meet modulation requirements.
6. Boiler control (not shown) Monitors internal and external sensors and controls blower, gas valve, 3-way valve and pumps to meet heating and DHW demand. Control is a “gas adaptive system” that regulates air and gas flow mixture by measuring flame ionization and adjusting gas valve to achieve a target air-fuel ratio. This eliminates need to make throttle screw or offset adjustments. System is self-calibrating and continuously maintains air-fuel ratio at desired value.
7. 120 VAC connection board Provides field connections for line voltage and two additional pumps (system pump and aux. pump).
8. Low voltage connection board Provides field connections for thermostats, external limits, remote firing devices (4-20mA or 0-10V), header sensor, outdoor sensor and LWCO.
9. Control enclosure Houses boiler control and provides access to installed fuses and spare fuses.
10. Local user display Allows review of boiler status and parameter adjustment. In event of fault condition, LCD display turns red and fault condition is displayed.
11. Flue temperature sensor Used to monitor flue gas exiting boiler. Boiler control will alarm, reduce boiler firing rate and shut down boiler if flue gas temperature is too high.

12. Boiler supply temperature sensor (UL 353 Listed) Dual element temperature sensor used to monitor boiler water exiting heat exchanger. Boiler control uses supply temperature to initiate CH burner demand, adjust firing rate to maintain CH set point temperature and shut down the boiler if supply temperature is too high.
13. Boiler return temperature sensor Used to monitor boiler water entering heat exchanger.
14. Ignitor/flame sensor A single ignitor/flame sensor is used to both provide ignition energy and monitor flame.
15. Air pressure switch Proves air flow (closes) prior to boiler ignition. Switch is proven open prior to starting blower.
16. Boiler Pump Internal boiler pump provides flow through heat exchanger.
17. Automatic air vent Connected to pump outlet, air vent helps remove air from water system.
18. Boiler flow switch (UL 353 Listed) Proves water is present in boiler and flow rate is adequate prior to starting boiler.
19. DHW flow sensor DHW flow sensor monitors DHW water demand. When DHW detects DHW draw greater than 0.5 gpm, boiler control initiates a DHW heat demand.
20. Plate heat exchanger Heats domestic water using boiler water.
21. 3-way valve When DHW flow sensor detects flow and DHW has priority, 3-way valve is positioned to direct all boiler water to plate heat exchanger. When CH demand has priority, valve is positioned to direct all boiler water to CH zones. 3-way valve’s default position is DHW.
22. DHW temperature sensor Used to monitor DHW water leaving plate heat exchanger. Boiler control uses DHW water temperature to initiate DHW burner demand and adjusts boiler firing rate to maintain DHW setpoint temperature.
23. Condensate trap (not shown) Allows combustion chamber and vent condensate to drain from boiler while retaining flue products in boiler.
24. Combi Black Drain (not shown) used to drain hydronic side water.

8

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4 How It Works (continued)

PHTM II Combi Installation, Operating & Service Instructions 20 21 17 13

1

2

22

4

15

9

12

19

16

11

18 3 8 7 14

10

Figure 4-1: How it works

110331-03 – 1/22

9

PHTM II Combi Installation, Operating & Service Instructions

5 Locating Boiler

Code Requirements
! WARNING
Asphyxiation Hazard. Adequate combustion and ventilation air must be provided to assure proper combustion and to prevent damage to boiler components. Provide ventilation openings into boiler room as described in “Air for Ventilation” in this manual. Combustion air must be brought to boiler from outdoors using an intake piping system meeting requirements in Section 7.

4. Locate boiler to avoid water damage in case there is a leak. If boiler must be located in an area sensitive to water damage, install drain pan underneath boiler and pipe to a suitable drain location. Manufacturer will not be held responsible for water damage resulting from this appliance or any of its components.
5. Check for and remove any combustible materials, gasoline, or other flammable liquids from area around boiler.
6. Check for and remove any potential combustion air contaminants from area around boiler and area around vent/air termination. See Table 5-2.

1. Installations must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or Natural Fuel Gas and Propane Installation Code, CAN/CSA B149.1.
2. All wiring must comply with National Electrical Code ANSI/NFPA 70 (in the USA) or the Canadian Electrical Code CSA C22.1 (in Canada) and any local regulations.
3. Where required by authority having jurisdiction, installation must conform to Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD1.
Location Considerations
1. If replacing an existing boiler, check for and correct common system problems including:
A. System leaks, which can result in premature heat exchanger failure from oxygen corrosion or hardness deposits
B. Inadequate freeze protection resulting in system freezing and leaking
C. Dirt or debris left in existing piping if it has not been properly flushed or cleaned
D. Incorrectly sized expansion tank
2. Boiler is listed for indoor installation only. Do not install where boiler will be exposed to freezing temperatures or ambient air temperatures in excess of 104°F (40°C). Do not install in an attic.
3. Protect gas ignition system components from water (dripping, spraying, rain, etc.) during appliance operation and service (circulator replacement, condensate trap cleaning, control replacement etc.).

! WARNING
Explosion Hazard. Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance. Do not install vent/air termination where gasoline or other flammable vapors or liquids are stored. Avoid locating vent/air termination near chemical products containing chlorine, chlorine based salts, chloro/fluorocarbons, paint removers, cleaning solvents, and detergents. Boiler could ignite vapors from flammable liquids resulting in explosion or fire.
Wall Mounting
1. Wall must be plumb and comprised of cement, brick, block, or wooden studs on 16 in. (406 mm) centers.
2. If flooding is possible, elevate boiler to prevent water reaching boiler.
3. Ensure boiler location minimizes risk of water damage from valves, pumps, etc.
Clearances
1. Provide clearances between boiler jacket and combustible material in accordance with authority having jurisdiction. Minimum clearances to combustible material shown in Figure 5-1.
2. Provide practical service clearances. 24 in. (610 mm) service clearance are recommended from left side, right side and front. If providing less than 24 in. (610 mm) front clearance, ensure access through a door. Minimum 6 in. (150 mm) clearance required to remove side panels.
3. Boiler must not be installed on carpeting.
NOTICE: If recommended service clearances are not provided, it may be necessary to remove boiler for service.

10

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PHTM II
5 Locating Boiler (continued)

Combi Installation, Operating & Service Instructions

Ventilation Air
1. Combustion air must be obtained directly from outdoors, however ventilation openings may still be required to prevent overheating of boiler components if boiler is installed in small space such as a closet.
2. If a 24″ clearance from boiler sides, front, and bottom can be maintained with all doors to the boiler room closed, no ventilation openings are required.

3. If 24″ clearances described in (2) cannot be maintained, provide two openings into room, one near floor and other near ceiling. Top of upper opening to be within 12 in. (305 mm) of ceiling and bottom of lower opening within 12 in. (305 mm) of floor. Minimum free area 100 in.2 (650 cm2) for each opening. This free area takes into account blocking effect of grills and louvers. If using screens, minimum screen size 1/4 in. (6.4 mm).

Closet Door

1 2

”

(13mm)*

Vent

Air

1 4

”

(6mm)

This boiler is listed for closet installation with the following clearances from the boiler jacket to combustible construction:
Top: 814″ (210mm), Sides: 12″ (13mm), Front: 12″ (13mm), Bottom: 6″ (150mm) Clearances also apply to non-combustible walls, doors, ceilings and floors. Clearances from piping to combustible construction: Non-Concentric Vent (exhaust):14″ (6mm) Concentric Vent or Air Intake Piping: 0″ Hot Water Piping: 14″ (6mm)
*Recommended Service Clearances: Sides, Front and Bottom: 24″ (610mm)

8

1 4

”

(210mm)

0-12″ (0-305mm)
Ventilation Opening (if required)

1 2

”

(13mm)*

1 2

”

(13mm)*

Closet Door

6″ (150mm)*

Ventilation Opening (if required)
0-12″ (0-305mm)
Provide access to this area for inspection and cleanout of condensate trap

Figure 5-1 : Minimum Clearances to Combustible Construction

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11

PHTM II
5 Locating Boiler (continued)

Combi Installation, Operating & Service Instructions

4. If boiler is installed in room with other appliances, provide adequate air for combustion and/or ventilation in accordance with other appliance manufacturer’s instructions and applicable code. If other appliance(s) require two openings at least 100 in.2 (650 cm2) each, no additional openings are required for this boiler.
Combustion Air and Venting
! WARNING
Asphyxiation Hazard. Boiler requires a special venting system designed for positive pressure. Supplied vent connector connects to CPVC, polypropylene, and stainless steel venting listed in Section 7, General Venting. Failure to vent boiler in accordance with these instructions could cause products of combustion to enter the building resulting in severe personal injury, death or substantial property damage.
! DANGER
Component Malfunction. Outdoor combustion air must be piped directly to boiler air connection. Ensure combustion air does not contain contaminants and is not drawn from an area likely to have contaminants per Table 5-2. For example, never pipe combustion air from areas near swimming pools or laundry room exhaust vents. Contaminated combustion air will damage boiler resulting in severe personal injury, death or substantial property damage.
1. Use only vent and air piping and termination methods listed in Section 7, General Venting. Vent and air piping must terminate either horizontally through a sidewall or vertically through a roof or chase. Locate boiler so vent and air intake piping can be routed through building and properly terminated.
2. Ensure installation does not exceed maximum air and vent pipe lengths and terminations are located in acceptable location per these instructions and all applicable local codes.

Table 5-2: Corrosive Combustion Air Contaminants and Sources
Contaminants to avoid: Spray cans containing chloro/fluorocarbons (CFC’s) Permanent wave solutions Chlorinated waxes/cleaners Chlorine-based swimming pool chemicals Calcium chloride used for thawing Sodium chloride used for water softening Refrigerant leaks Paint or varnish removers Hydrochloric acid/muriatic acid Cements and glues Antistatic fabric softeners used in clothes dryers Chlorine-type bleaches, detergents, and cleaning solvents found in household laundry rooms. Adhesives used to fasten building products and other similar products Excessive dust and dirt
Areas likely to have contaminants: Dry cleaning/laundry areas and establishments Swimming pools Metal fabrication plants Beauty shops Refrigeration repair shops Photo processing plants Auto body shops Plastic manufacturing plants Furniture refinishing areas and establishments New building construction Remodeling areas Garages with workshops

12

110331-03 – 1/22

PHTM II
5 Locating Boiler (continued)

Combi Installation, Operating & Service Instructions

Connecting New Boiler to Existing Vent System
! WARNING
Asphyxiation Hazard. If any of below conditions cannot be met, existing vent system must be updated or replaced. Failure to follow these instructions could cause products of combustion and/ or carbon monoxide to enter living space, resulting in severe personal injury, death or substantial property damage.
1. If using existing vent system to vent new boiler, check the following: A. Material and manufacturer are listed in Section 7 General Venting. B. Proper size and length per Table 7-7. C. Appropriate supports to prevent sagging and vertical movement. D. Minimum slope per Section 7 guidelines. E. Terminations and their location comply with Section 7 General Venting, Section 8 Sidewall Direct Venting, or Section 9 Vertical Direct Venting. F. Seals and connections per Section 7 General Venting and /or vent system manufacturer’s instructions. System must be tested per procedure Removing Existing Boiler in this section.
G. Vent pipe and components should be replaced if there is any question to their integrity.
Removing Existing Boiler
! DANGER
Asphyxiation Hazard. Do not vent this boiler into a common vent with any other appliance. Connecting this boiler to a common vent will cause products of combustion and/or carbon monoxide to enter living space as well as appliance malfunction, resulting in severe personal injury, death or substantial property damage.
When an existing boiler is removed from a common venting system, the common venting system is likely to be too large for proper venting of the appliances remaining connected to it.
At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation:
110331-03 – 1/22

1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion, and other deficiencies which could cause an unsafe condition.
3. Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
4. Place in operation the appliance being inspected. Follow the Lighting (or Operating) Instructions. Adjust thermostat so appliance will operate continuously.
5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar or pipe.
6. After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous condition of use.
7. Any improper operation of the common venting system should be corrected so the installation conforms with the National Fuel Gas Code, ANSI Z223.1/NFPA 54. When resizing any portion of the common venting system, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Chapter 13 of the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
Residential Garage Installation
1. If installing in residential garage or adjacent space open to garage that is not part of living space:
A. Burner and burner ignition devices must be a minimum of 18 in. (46 cm) above floor.
B. Boiler must be located and/or protected to prevent damage from moving vehicle.
2. Follow local codes for locating a residential boiler in a garage or National Fuel Gas Code, ANSI Z223.1/NFPA 54. in absence of such codes.
13

6 Preparing Boiler

PHTM II Combi Installation, Operating & Service Instructions

Unpack Boiler
Remove boiler and miscellaneous parts carton from outer shipping carton.
! CAUTION
Boiler Damage. Do not attempt to lift boiler using water or gas pipe connection as hand holds.
! CAUTION
Boiler Damage. Do not drop boiler. Damage to boiler can result.
4

! CAUTION
Heavy Object. Boiler weighs up to 130 lb (59 kg). Two people are required to lift boiler onto wall mounting bracket. Ensure wall bracket is anchored to structure capable of supporting weight of boiler and attached piping when filled with water. Areas subject to earthquakes may have special requirements that take precedence over requirements in these instructions.

3

2

Misc. Parts Carton B Boiler
A

Gasket (2X) (3/4″ Rubber)
Screw (4X)

Gasket (2X) (1/2″ Rubber)

Vent Connector

Header

DHW Connector (2X)

Wall Hook

Lag Screw (4X) Washer (4X)

Gas Valve Inlet Adapter

Gasket (3/4″ Paper)

Safety Relief Valve

Temp./Pressure Gauge

Drain Valve

Wall Retaining Clip (2X)

Gas Shutoff Valve

4
14

Figure 6-1: What’s in the Box
3

2
110331-03 – 1/22

PHTM II
6 Preparing Boiler (continued)

Combi Installation, Operating & Service Instructions

Install Vent Connector
1. Remove vent connector and screws from miscellaneous parts carton.
2. Check vent reducer on top of heat exchanger to ensure it is installed properly.
! WARNING
Asphyxiation Hazard. A boiler operating with an improperly installed vent reducer (3″ to 2″) could cause unreliable operation at elevated carbon monoxide levels resulting in severe personal injury, death, or substantial property damage.

Preparing for Fuel Conversion
If using LP gas. LP conversion requires (2) steps: gas valve setting adjustment and control parameter change.
1. Use 2.5 mm hex wrench to adjust gas valve setting from “1” to “2” (Figure 6-3). For easy access to gas valve remove left side panel using (2) Phillips screws. (136 combi only)
2. See Section 15 “Start-Up and Checkout” for Control Parameter adjustment instructions.

3. Lubricate heat exchanger vent gasket with

soapy water.

4. Insert vent connector through jacket into heat

exchanger with flue gas sample port facing

forward. See Figure 6-2.

5. Tighten 4 screws.

Attach with (4) screws

Vent Connector

Flue gas sample port facing front of boiler

Figure 6-3: Gas Valve Fuel Setting

Figure 6-2: Installing Vent Connector

110331-03 – 1/22

15

PHTM II
6 Preparing Boiler (continued)

Combi Installation, Operating & Service Instructions

Mount Boiler
1. Wall bracket is designed to mount on studs with 16 in. (406 mm) centers or a masonry wall. For other stud spacing, mount bracket to 3/4 in. (19 mm) plywood or horizontal 2 x 4 anchored to studs.
! CAUTION
Heavy object. Do not mount boiler to a hollow wall. Boiler must be anchored to studs.
2. Mark wall bracket hole locations using dimensions shown in Figure 6-4. Ensure bracket is level.
18″ (457mm) 16″ (406mm) 14″ (356mm) 9″ (229mm) 2.5″ (64mm)
1″ (25mm)

3. For wood studs, drill 3/16 in. (4.8 mm) pilot holes “A” and “B” and attach bracket using provided 5/16 in. x 2 in. lag screws and washers. For wood studs with drywall or paneling greater than 1/2 in. (12 mm) thick, metal studs, or masonry wall, use anchors suitable for boiler weight and appropriate for wall material.
4. Hang boiler on wall bracket. See Figure 6-5. 5. Attach bottom retaining clips to boiler and mark
hole locations. Drill 3/16 in. (4.8 mm) pilot holes “C” and “D” and attach to wall using provided 5/16 in. x 2 in. lag screws or other anchors appropriate for wall material. 6. Verify boiler is level and plumb.
Wall Bracket

Relief Valve CL Vent CL Air CL

A

B

.4″ (10mm)

Boiler

(2X) Retaining Clip

Boiler Supply CL DHW Out CL Gas CL DCW In CL Boiler Return CL Condensate Drain CL
Boiler Outline

30″ (762mm)

1″ (25mm)

C

D

2.5″ (64mm)

5″ (127mm) 6″ (152mm) 10″ (254mm) 13″ (330mm)

14″ (356mm)

Figure 6-4: Wall Layout and Mounting Holes 16

2 X 4 Wood Stud

See detail
(4X) 5/16″ X 2″ Lag Screw
(4X) 5/16″ Flat Washer

Drywall or other sheathing
Rear of Boiler

Support Rail
Retaining Clip

Installed Retaining Clip Detail
Figure 6-5: Mounting Boiler on Wall
110331-03 – 1/22

7 General Venting

PHTM II Combi Installation, Operating & Service Instructions

Direct Vent Sidewall Termination Options

Figure 7-1: Sidewall Termination with Fittings see Section 8 for details

Figure 7-2: Sidewall Low Profile Termination – see
Section 8 for details

Direct Vent Vertical Termination Options

Figure 7-3: Sidewall Concentric Termination see Section 8 for details

Figure 7-4: Vertical Termination with Fittings see Section 9 for details
110331-03 – 1/22

Figure 7-5: Vertical Concentric Termination – see
Section 9 for details

Figure 7-6: Vertical Termination with Abandoned B-vent or
Chimney Chase – see Section 9 for details
17

PHTM II Combi Installation, Operating & Service Instructions

7 General Venting (continued)
Vent and Air Sizing
! WARNING
Asphyxiation Hazard. · Failure to vent this boiler in accordance with these instructions could cause products of combustion and/or carbon monoxide to enter living space, resulting in severe personal injury, death or substantial property damage.
· Vent installations shall be in accordance with provisions of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or “Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable requirements of the local building codes. · This boiler requires a special venting system. Use only CPVC, PVC, or polypropylene venting systems listed in Tables 7-11 or 7-16. · Thoroughly inspect finished vent and air piping to ensure air-tightness and compliance with provided instructions and code requirements. · Do not mix components from different venting systems. · Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.
· Follow all local codes for isolation of vent pipe when passing through floors or walls.
· Do not use a barometric damper, draft hood, or vent damper with this boiler.
· Do not connect any other appliance to vent pipe or multiple boilers to a common vent pipe.
· Follow instructions in Section 5, Locating Boiler, when removing a boiler from an existing vent system.
· Failure to comply with any of the above requirements could result in severe personal injury, death or substantial property damage.
Table 7-7: Vent and Air Sizing

1. Min and max lengths are calculated separately for air and vent. For example, max length 135 ft. (41.1 m) means up to 135 ft. (41.1 m) air piping and up to 135 ft. (41.1 m) vent piping.
2. If using 2 in. x 3 in. increaser, use max 12 in. (305 mm) of 2 in. pipe before increaser. For equivalent length, count only 3 in. (80 mm) pipe starting from increaser.
3. Maximum length of flexible polypropylene venting is reduced due to higher pressure drop. See Table 7-10.
4. If using B-vent air chase, 1 ft. (0.30 m) B-vent equals 1 equivalent ft. ( 0.30 m).

Table 7-8: CPVC/PVC Fitting Equivalent Lengths

Fitting

Equivalent Length ft. (m)

2 in.

3 in.

90° Short Elbow

6.0 (1.8) 10 (3.0)

90° Sanitary Elbow 2.6 (0.8) 4.0 (1.2)

45° Elbow

1.5 (0.5)

2 (0.6)

Table 7-9: Rigid PolyPro Fitting Equivalent Lengths

DuraVent PolyPro

Centrotherm Selkirk

InnoFlue

PolyFlue

2 in. (60 mm) 45° elbow

3 ft. (0.91 m)

3 ft. (0.91 m)

3.3 ft. (1.0 m)

2 in. (60 mm) 90° or 87° 5 ft. (1.5 m) elbow

5 ft. (1.5 m)

4.8 ft. (1.5 m)

3 in. (80 mm) 45° elbow

3 ft (0.91 m)

3 ft. (0.91 m)

3.6 ft. (1.1 m)

3 in. (80 mm) 90° or 87° 7 ft. (2.1 m) elbow

7 ft. (2.1 m)

7.2 ft. (2.2 m)

Table 7-10: Flexible Polypropylene Equivalent Length for 1 ft. (0.30 m) Measured Length

DuraVent PolyPro Flex

Centrotherm InnoFlue Flex

Selkirk Polyflue Flex

2 in.

2 ft.

(60 mm) (0.61 m)

2.5 ft. (0.76 m)

2.5 ft. (0.76 m)

3 in.

2 ft.

(80 mm) (0.61 m)

2.3 ft. (0.70 m)

2.36 ft. (0.70 m)

Model Number

Vent/Air Size in. (mm)

PHTM2136C PHTM2200C

2 (60) 3 (80) 2 (60) 3 (80)

Min Equivalent Length ft.
(m)
2.5 (0.76)
2.5 (0.76)
2.5 (0.76)
2.5 (0.76)

Max Equivalent Length ft.
(m)
70 (21.3)
135 (41.1)
70 (21.3)
135 (41.1)

Approx. Derate at Max Length
(%)
7
1
9
5

18

110331-03 – 1/22

PHTM II
7 General Venting (continued)

Combi Installation, Operating & Service Instructions

5. Example equivalent length calculation for 2 in. vent:
A. 1 ft. CPVC straight pipe =1 eq ft. B. 90° CPVC short elbow = 6 eq ft. C. 1.5 ft. CPVC straight pipe=1.5 eq ft. D. Coupling = 0 eq ft. E. 10 ft. PVC straight pipe = 10 eq ft. F. 90° PVC sanitary elbow = 2.6 eq ft. G. 15 ft. PVC straight pipe = 15 eq ft. H. PVC coupling (terminal) = 0 eq ft. I. Total vent length = 36.1 eq ft.
(acceptable length per Table 7-7)
6. Listed Air Piping Materials
A. PVC/CPVC B. Polypropylene C. B-vent double wall vent (with joints and
seams sealed with RTV silicone)
7. Listed Vent Materials
A. CPVC/PVC – See Table 7-11 B. Polypropylene – See Table 7-16
CPVC/PVC Venting
! WARNING
Asphyxiation Hazard. · Use only vent materials, primer, and cement listed in Table 7-11 to make vent connections.
· Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radal® (polyphenolsulfone) in venting systems is prohibited.
· PVC vent systems must include at least 30 in. (760 mm) of CPVC pipe and one CPVC elbow between boiler and PVC vent piping.
· CPVC is required within any interior space where air cannot circulate freely, including a vertical or horizontal chase, inside a stud wall, in a closet, and through wall penetrations.
· Maintain clearances to vent piping per Figure 5-1.
· Failure to comply with venting instructions could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
! WARNING
Asphyxiation Hazard. All CPVC/PVC vent joints must be glued. Failure to comply could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
110331-03 – 1/22

NOTICE: PVC may not be used to penetrate combustible or non-combustible walls unless all of the following conditions are met. If any of these conditions cannot be met, use CPVC for wall penetration. See Figure 7-14.
· Wall penetration is at least 66 in. (1.7 m) from boiler measuring along vent pipe.
· Wall is less than or equal to 12 in. (305 mm) thick.
· Air space shown in Figure 7-14 is maintained around outside diameter of vent.

1. Slope CPVC/PVC vent pipe not less than 1/4 in. per foot (21 mm per m) upwards from boiler to vent terminal for condensate drainage.

2. Support CPVC/PVC pipe at intervals not exceeding 4 ft. (1.2 m).

3. Be sure to use appropriate primer and cement

when joining CPVC to PVC. The following or

equivalent may be used to join CPVC to PVC:

A.

Primer: IPS P-70

B.

Cement: IPS 790

Table 7-11: Listed CPVC/PVC Vent Materials

Vent Pipe
Vent Fittings
Primer/ Cement

Material CPVC, sched. 40 or 80 PVC, sched. 40 or 80 PVC, DWV CPVC, sched. 80 PVC, sched. 40 PVC, sched.80 PVC, DWV CPVC PVC

Standard ASTM F441 ASTM D1785 ASTM D2665 ASTM F439 ASTM D2466 ASTM D2467 ASTM D2665 ASTM F493 ASTM D2564

NOTICE: In Canada, CPVC and PVC vent pipe, fittings, and cement/primer must be ULC-S636 listed.
4. Work from boiler towards vent or air termination. Do not exceed maximum equivalent lengths shown in Table 7-7. See Table 7-8 for equivalent lengths of elbows and fittings.
5. Starting from the boiler, first 30 in. (760 mm) of vent pipe and first elbow must be CPVC. 30 in. (760 mm) CPVC pipe may be cut at any location and CPVC elbow installed between two resulting CPVC pipes before transitioning to PVC. PVC coupling may be used to join CPVC to PVC vent piping. See Figure 7-12.
19

PHTM II Combi Installation, Operating & Service Instructions

7 General Venting (continued)

6. CPVC/PVC vent starter kits are available. Kits include 30 in. (760 mm) CPVC pipe, 90° short CPVC elbow, PVC coupling (vent terminal), 90° short PVC elbow (air terminal), and 2 terminal screens. Components in these kits are not ULC-S636 listed and are therefore not usable in Canada.

A.

2 in. kit: 107039-01

B.

3 in. kit: 107039-02

7. Allow for 3/8 in. (9.5 mm) of thermal expansion per 10 ft. (3.0 m) of CPVC/PVC pipe. If a straight run of pipe exceeds 20 ft. (6.0 m) and is restrained at both ends, an offset or expansion loop is required per Figure 7-15. If a straight horizontal run of pipe exceeds 20 ft. (6.0 m) and is restrained at one end with an elbow at the other, ensure hanger or guide is not less than Y in from elbow per Figure 7-15. Thermal expansion fittings not permitted.

8. All air piping may be PVC.

9. Vent and air can be up-sized to 3 in. for longer runs. If up sizing to 3 in. vent material, maximum length of 2 in. pipe is 12 in. (305 mm) before transitioning with 2 x 3 CPVC increaser for vent piping and similar PVC fittings for air. Increaser must be installed in vertical section of pipe. See Figure 7-13.

10. Cut pipe squarely and debur inside and outside of pipe ends after cutting.

11. Dry fit all vent and air components before cementing any joints.

12. Use field supplied primer and cement appropriate for materials being joined. Follow primer and cement instructions to join pipe and fittings.

13. Clean all pipe ends and fittings with appropriate primer before cement. Apply primer to both pipe and fitting socket before applying cement.

14. Boiler vent connector is gasketed. Lubricate gasket with soapy water, insert pipe until it bottoms out, and tighten clamp.

15. Boiler air connector in PVC socket fitting. Drill 7/32 in. (5.5 mm) hole in air connector. Drill 1/8 in. (3.2 mm) hole in air pipe to align with hole in connector. Insert pipe into air connector and use #10 x 1 in. sheet metal screw to secure. Seal joint between air connector and pipe with RTV silicone.

16. To the extent possible, slope horizontal air piping towards outdoors.

PVC coupling may be used to join CPVC to PVC vent pipe.
At least 30in. (760mm) of CPVC pipe and one CPVC elbow required between boiler and PVC vent piping.

To vent termination
From air termination

Clamp

Figure 7-12: Near Boiler CPVC/PVC Venting

At least 30in. (760mm) of CPVC pipe and one CPVC elbow required between boiler and PVC vent piping.
3in. X 2in. CPVC Increaser
Max. 12in. (305mm) 2in. CPVC pipe

PVC coupling may be used to join CPVC to PVC vent piping.

To vent termination
From air termination

3in. X 2in. PVC Increaser
Max. 12in. (305mm) 2in. PVC pipe

Clamp

Figure 7-13: Near Boiler CPVC/PVC Venting with Increaser
Note: Length of 2 in. pipe is counted toward 30 in. CPVC requirement.

20

110331-03 – 1/22

PHTM II
7 General Venting (continued)

Combi Installation, Operating & Service Instructions

Maximum Wall Thickness (“T”)

2″*

6″

12″

(50mm) (150mm) (305mm)

Minimum air space around pipe (“C”)

0″*

1″

1-3/4″

(0mm) (25mm) (45mm)

*Wall must be of non-combustible construction

PVC Vent Pipe

“C”

One end of opening may be closed

Boiler

66″ Min (168cm)

“T” Wall

Figure 7-14: PVC Venting Wall Penetration Clearance
Loop (horizontal only)
(top view)

2Y/5

6″ (150mm) Min

Y/5 Length of straight run between anchors (“X”)

6″ (150mm) Min

Pipe Dia., in. 2
3

X, ft. (m) 20 (6.1) 30 (9.1) 40 (12.2) 50 (15.2) 60 (18.3) 20 (6.1) 30 (9.1) 40 (12.2) 50 (15.2) 60 (18.3)

Y, in. (cm) 41 (104) 50 (127) 58 (147) 65 (165) 71 (180) 50 (127) 61 (155) 70 (178) 79 (201) 86 (218)

Key Anchor (restricts linear movement)

Hanger (allows linear movement)

110331-03 – 1/22

Can use either anchor or hanger
Figure 7-15: CPVC/PVC Venting Expansion Loops 21

PHTM II
7 General Venting (continued)

Combi Installation, Operating & Service Instructions

Polypropylene Venting
! WARNING
Asphyxiation Hazard. · Use only vent materials listed in Table 7-16 to make vent connections. Consult vent manufacturer’s instructions for required support and special connections.
· Follow vent manufacturer’s instructions supplied with vent system.
· Do not mix vent systems of different types or manufacturers.
· Maintain clearances to vent piping per Figure 5-1.
· Failure to comply with venting instructions could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
! WARNING
Asphyxiation Hazard. All polypropylene vent systems rely on gaskets for sealing. Ensure gaskets are installed in each female end of vent pipe or fitting. Failure to make proper joint connections could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
NOTICE: Polypropylene vent connections must be secured by vent manufacturer’s joint connector.
1. Slope polypropylene vent pipe not less than 5/8 in. per ft. (52 mm per m) upwards from boiler to vent terminal for condensate drainage.
2. Support polypropylene venting per vent manufacturer’s instructions.
3. Examine all components for possible shipping damage prior to installation.
4. Work from boiler towards vent or air termination. Do not exceed maximum equivalent lengths shown in Table 7-7. See Table 7-9 for equivalent lengths of elbows and fittings.
5. Only cut polypropylene vent pipe as permitted by vent manufacturer and in accordance with their instructions. Ensure cut end is square and deburred prior to assembly.

Table 7-16: Listed Polypropylene Vent Materials (ULC-S636 Listed)

Manufacturer DuraVent Centrotherm Selkirk

Model Polypropylene Single Wall Rigid PolyPro Flex InnoFlue Single Wall Rigid InnoFlue Flex PolyFlue Single Wall Rigid PolyFlue Single Wall Flex

6. Boiler vent connector is gasketed. Lubricate gasket with soapy water, insert pipe until it bottoms out, and tighten clamp. See Figure 7-18.
7. Assemble remainder of vent system in accordance with vent manufacturer’s instruction being sure to provide for thermal expansion. Clamp sections together as directed by vent manufacturer.
8. All air piping may be PVC or polypropylene. PVC to polypropylene adapter required at boiler connection if using polypropylene air piping.
9. Vent and air can be up-sized to 3 in. for longer runs. Requires 2 x 3 in. polypropylene increaser. Vent increaser must be directly attached to boiler vent connector and must be installed in vertical section of pipe. If using polypropylene air piping, increaser must be directly attached to PVC to polypropylene adapter and must be installed in vertical section of pipe. See Figure 7-19.
10. If using flexible polypropylene:
A. Maximum length of corrugated flexible venting will be reduced vs. rigid pipe due to higher pressure drop of flexible venting. See Table 7-10.
B. Store vent material in ambient space 41°F (5°C) or warmer before beginning installation. Observe vent manufacturer’s instructions for storing and handling this pipe.
C. Use only in vertical or near vertical installations with bends no greater than 45°. Maximum two offsets (four bends).

22

110331-03 – 1/22

PHTM II
7 General Venting (continued)

Combi Installation, Operating & Service Instructions

Table 7-17: Listed Polypropylene Vent Fittings

Joint Connector Increaser

Length
2 in. (60 mm) 3 in. (80 mm) 2 in. (60 mm) to 3 in. (80 mm)

DuraVent PolyPro 2PPS-LC 3PPS-LC
2PPS-X3L

PVC to PP Adapter 2 in. (60 mm)

2PPS-ADL

Centrotherm InnoFlue
IANS02 IANS03
ISIA0203
ISAGL0202 adapter + IAFC02 clamp

Selkirk PolyFlue
PF-LB PF-LB or 4PF-LB 2PF-2I3 + PF-LB
locking band
N/A

Joint connector required at all joints in venting system
Clamp

Vent Air
PVC to polypropylene adapter required when using polypropylene air piping

Joint connector required at all joints in venting system
2in X 3in (60mm X 80mm) increaser
Clamp

Vent Air
PVC to polypropylene adapter required when using polypropylene air piping

Figure 7-18: Near Boiler Polypropylene Venting

Figure 7-19: Near Boiler Polypropylene Venting with Increaser

110331-03 – 1/22

23

8 Sidewall Direct Venting

PHTM II

Combi Installation, Operating & Service Instructions

Determine Terminal Location
! WARNING
Asphyxiation Hazard. · Follow these instructions when determining vent terminal location. Failure to comply could result in severe personal injury, death or substantial property damage. · A gas vent extending through an exterior wall shall not terminate adjacent to a wall or below building extensions such as eaves, parapets, balconies, or decks.
1. Do not exceed maximum equivalent vent and air pipe length in Table 7-7.
2. Consider surroundings when selecting terminal location:
A. Locate terminal so flue gas will not damage nearby plants or air conditioning equipment or be objectionable to building owner.
B. During cold weather, a visible cloud of flue gases will be emitted from terminal. Avoid areas where this could obstruct window view or be otherwise objectionable.
C. Flue gas may condense or freeze causing water or ice buildup on objects surrounding structure. Move or protect these objects if they are subject to damage from condensate.
D. Avoid possibility of accidental contact of flue gas with people or pets.
E. Avoid locating terminal where wind currents could affect performance or cause recirculation. Areas to avoid include inside building corners, near adjacent buildings or surfaces, windows wells, stairwells, alcoves, courtyards, or other recessed areas.
3. Locate terminals so they are not likely to be damaged by foreign objects such as stones or balls, or subject to buildup of leaves or dirt.
4. Maintain clearances to vent terminal per Figure 8-1.
A. Minimum 12 in. (305 mm) from any door, window or other gravity air inlet.
B. Minimum 3 ft. (900 mm) above any forced air inlet located within 10 ft. (3.1 m).

C. Minimum 12 in. (305 mm) from inside corner. 6 ft (1.8 m) is generally recommended and required when window and/or air inlet is within 4 ft. (1.2 m) of inside corner.
D. Do not locate terminal above a public walkway.
E. Minimum 12 in. (305 m) below roof overhang. Close proximity to overhang and/or a deep overhang requires vent terminal to protrude farther from wall.
F. Minimum 4 ft. (1.2 m) in USA or 6 ft. (1.8 m) in Canada from any electric meter, gas meter, regulator, or relief equipment. Never terminate above or below any of these within 4 ft. (1.2 m) horizontally.
G. Vent and air terminals minimum 12 in. (305 mm) above grade or normal snow line, if applicable.
5. Do not locate vent terminal under decks or similar structures.
6. Avoid locating combustion air terminal in an area with or likely to have contaminants. See Table 5-2.
NOTICE: Minimize lengths of piping outside building to reduce risk of condensate freezing in vent pipe causing boiler shutdown.
Prepare Wall Penetrations
1. Use base plate (if applicable) to determine air and vent pipe hole centerline locations.
2. Cut hole for air pipe as close as desired to pipe outside diameter.
3. Cut hole for vent pipe at least 1 in. (25 mm) larger than pipe outside diameter following required clearance per Figure 5-1.
4. Ensure vent wall penetration and methods of securing and sealing around terminal allow for thermal expansion.

24

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
8 Sidewall Direct Venting (continued)

Figure 8-1: Vent Terminal Clearances (Air Terminal not Shown for Clarity)

110331-03 – 1/22

25

PHTM II Combi Installation, Operating & Service Instructions
8 Sidewall Direct Venting (continued)

CPVC/PVC or Polypropylene Fittings Terminal
! WARNING
Asphyxiation Hazard. All CPVC/PVC vent joints must be glued. Failure to comply could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
! WARNING
Asphyxiation Hazard. All propylene vent systems rely on gaskets for sealing. Ensure gaskets are installed in each female end of vent pipe or fitting. Failure to make proper joint connections could cause products of combustion and/or carbon monoxide to enter building, resulting in severe personal injury, death or substantial property damage.

Table 8-3: Polypropylene Sidewall Terminal Fittings

DuraVent PolyPro

Centrotherm InnoFlue

Selkirk PolyFlue

UV resistant single wall pipe + two 2PPSE90BC elbows + 2PPS-BG screen

UV stabilized end pipe + two ISELL0287UV elbows + IASPP02 screen

UV resistant pipe + two 2PF90UV elbows + 2PF-HVST screen

Note: 2 in. (60 mm) components shown. Replace “2”

with “3” for 3 in. (80 mm) component part numbers.

From boiler vent connection

PVC coupling or polypropylene end pipe

To boiler air connection

7′ (2.1m) Max.

12″ (305mm) Min. 12″ (305mm) Min.

1. Vent terminates outside building in elbow, coupling, or end pipe pointing outward away from wall and air terminal. Air terminates outside building in downward-facing elbow. Air terminal may be to left or right of vent terminal. See Figures 8-2 and 8-4.
2. Screens on vent and air intake terminals are generally recommended. Use 1/2 in. (12 mm) mesh stainless steel for CPVC/PVC or listed screens for polypropylene.
3. Vent terminal minimum 12 in. (305 mm) above air terminal.
4. Required CPVC/PVC vent pipe and fittings listed in Table 7-11. Polypropylene listed in Tables 7-16 and 7-17.

To boiler vent connection
To boiler air connection

12″ (305mm) Min. 7′ (2.1m) Max.

Grade or Snow line
Figure 8-4: Alternate Fittings Terminal

5. Assembly

A. Use appropriately sized wall thimble or a sheet metal plate on building exterior to maintain proper clearance and provide weather tight seal.

B. If venting with polypropylene:

i. Use UV resistant or UV stabilized components for all exterior pipe and fittings.

ii. Remove gasket from terminal fitting to install screen.

6. Brace exterior vertical runs of piping as required.

7. Seal exterior openings thoroughly with exterior

caulk.

From boiler vent connection

To boiler air connection

Elbow

Screen

12″ (305mm) Min.
Grade or snow line
Figure 8-2: Fittings Terminal 26

Elbow
Screen Wall Thimble
Figure 8-5: CPVC/PVC Fittings Terminal Assembly 110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
8 Sidewall Direct Venting (continued)

From boiler vent connection
To boiler air connection

Wall Thimble

DuraVent & Selkirk: Remove gasket to install screen
Elbow

Table 8-7: CPVC/PVC Low Profile Terminal Kits

Length

Ipex

Diversitech

2 in. (60 mm)

397984

HVENT-2

3 in. (80 mm)

397985

HVENT-3

Elbow

Joint Connector

Screen

3. Follow terminal manufacturer’s instructions for assembly.
NOTICE: Ensure outer terminal orientation per Figure 8-8.
! WARNING
Asphyxiation Hazard. Ensure outer terminal cover is installed before operating boiler. Operation without outer cover installed could cause product damage or improper operation resulting in severe personal injury, death or substantial property damage.

Figure 8-6: Polypropylene Fittings Terminal Assembly
CPVC/PVC Low Profile TPeorsmsibilenOarlientations ! WARNING
Asphyxiation Hazard. All CPVC/PVC vent joints must be glued. Failure to comply could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
1. Low profile terminals listed in Table 8-7 may be used to terminate air and vent outside building per Figure 8-8. Both air and vent pipes must attach to terminal kit.
2. Required vent pipe and fittings listed in Table 7-11.

From boiler vent connection
To boiler air connection

12″ (305mm) Min.

Grade or Snow line

Possible Orientations

To boile air connec

Gra Sno
Figure 8-8: Low Profile Terminal

110331-03 – 1/22

27

PHTM II Combi Installation, Operating & Service Instructions

8 Sidewall Direct Venting (continued)

CPVC/PVC Concentric Terminal
! WARNING
Asphyxiation Hazard. All CPVC/PVC vent joints must be glued. Failure to comply could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
1. Concentric vent terminals listed in Table 8-9 may be used to terminate air and vent outside building per Figure 8-10. Both air and vent pipes must attach to terminal kit.
! WARNING
Asphyxiation Hazard. If vent system is too short to accommodate required 30 in. (760 mm) of CPVC pipe and CPVC elbow between boiler and PVC venting, use listed CPVC terminal kit. Failure to comply could result in severe personal injury, death or substantial property damage.

2. Required vent pipe and fittings listed in Table 7-11.
Table 8-9: CPVC/PVC Concentric Terminal Kits

Length

Ipex

Diversitech

2 in. (60 mm) PVC

397005

CVENT-2

2 in. (60 mm) CPVC 197040

N/A

3 in. (80 mm) PVC

397006

CVENT-3

3 in. (80 mm) CPVC 197009

N/A

Note: Additional Ipex concentric terminal kits with different lengths may also be used.

3. Follow terminal manufacturer’s instructions and Figure 8-11 for assembly.
4. If needed, terminal can be shortened. Follow terminal manufacturer’s instructions and Figure 8-12.
! WARNING
Asphyxiation Hazard.
Ensure rain cap is installed before operating boiler. Operation without rain cap installed could cause product damage or improper operation resulting in severe personal injury, death or substantial property damage.
If using stainless steel screw to attach rain cap, always drill clearance hole in rain cap and pilot hole in vent pipe appropriate for screw size to avoid cracking PVC components. Failure to comply may cause product damage or improper operation, resulting in severe personal injury, death, or substantial property damage.

From boiler To boiler vent connection air connection
IPEX or Diversitech Concentric Terminal

1″ (25mm) Min. 2″ (50mm) Max.

Grade/ Snow line

12″ (305mm) Min.

Elbow (field supplied) Combustion
air

Clamp or Strap (field supplied) Outer Pipe Inner Pipe

Figure 8-10: CPVC/PVC Concentric Terminal
Combustion air
Rain Cap

Vent

Vent

Wye Fitting

Sidewall

Location of optional screen 12″ (305mm) Min above grade/snow line
1″ (25mm) Min 2″ (50mm) Max

Figure 8-11: CPVC/PVC Concentric Terminal Installation

28

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions

8 Sidewall Direct Venting (continued)

*Overall length of inner pipe to be ‘A’ longer than overall length of outer pipe.
Concentric Wye Fitting

Kit Size

*’A’

‘B’

‘C’

7-3/8″ (187mm) 1-3/4″ (44mm)

2″

3-1/2″ (89mm)

12-3/16″ (310mm) 3/4″ (19mm)

8-3/4″ (222mm) 2-1/4″ (57mm)

3″

4-1/2″ (114mm)

12-3/16″ (310mm) 1″ (25mm)

Manufacturer IPEX
DIVERSITECH IPEX
DIVERSITECH

12″ (305mm)
Min
‘C’

‘B’
To install stainless steel screw and nut locate drill location dimple on outside of rain cap and drill a 3/16″ (4.8mm) hole through cap and inner pipe wall ensuring path of hole is perpendicular to inner pipe. Do not overtighten screw.

*Inner Vent Pipe

Outer Air Intake Pipe

Rain Cap

Notes: 1. All cuts must be square and deburred. 2. Lengthening of terminal is not permitted.
Figure 8-12: CPVC/PVC Concentric Terminal Dimensions

Polypropylene Concentric Terminal
! WARNING
Asphyxiation Hazard. All polypropylene vent systems rely on gaskets for sealing. Ensure gaskets are installed in each female end of vent pipe or fitting. Failure to make proper joint connections could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
1. Concentric terminals listed in Table 8-13 may be used to terminate air and vent outside building per Figure 8-14. Both air and vent pipes must attach to terminal kit.
Table 8-13: Polypropylene Concentric Sidewall Terminal Components

2. Required vent pipe and fittings listed on Tables 7-16 and 7-17.
3. One polypropylene to PVC adapter required. Install at terminal air pipe connection if using PVC air pipe. Install at boiler air connection if using polypropylene air pipe.
4. Follow terminal manufacturer instructions for assembly.

From boiler vent connection
To boiler air connection

Polypropylene Concentric Sidewall Terminal (DuraVent shown)

Length
2 in. (60 mm)
3 in. (80 mm)

DuraVent PolyPro 2PPS-HKC
3PPS-HKC

Centrotherm InnoFlue
ICWT242 terminal + ICTCR24 two-pipe
adapter
ICWT352 terminal + ICCT3503 two-pipe
adapter

110331-03 – 1/22

Selkirk PolyFlue
2PF-HCT terminal + 2PF-CTA twopipe adapter
3PF-HCT terminal + 3PF-CTA twopipe adapter

12″ (305mm) Min.

Grade/ Snow line

Figure 8-14: Polypropylene Concentric Terminal 29

9 Vertical Direct Venting

PHTM II Combi Installation, Operating & Service Instructions

Determine Terminal Location
! WARNING
Asphyxiation Hazard. Follow these instructions when determining vent terminal location. Failure to comply could result in severe personal injury, death or substantial property damage.
1. Do not exceed maximum equivalent vent and air pipe length in Table 7-7.
2. Vent must terminate at least 2 ft. (610 mm) above any part of the building within 10 ft. (3.1 m) horizontally.
3. Avoid locating combustion air terminal in an area with or likely to have contaminants. See Table 5-2.
NOTICE: Minimize lengths of piping outside building to reduce risk of condensate freezing in vent pipe causing boiler shutdown.
Prepare Roof Penetrations
1. Cut hole for air pipe as close as desired to pipe outside diameter.
2. Cut hole for vent pipe at least 1 in. (25 mm) larger than pipe outside diameter following required clearance per Figure 5-1.
3. Ensure vent roof penetration and methods of securing and sealing around terminal allows for thermal expansion.
4. Use roof flashing and storm collars to ensure a weather tight seal and prevent moisture from entering building.
5. Follow all local codes for isolation of vent pipe and fire stops when passing through floors, ceilings, and roofs.
CPVC/PVC or Polypropylene Fittings Terminal
! WARNING
Asphyxiation Hazard. All CPVC/PVC vent joints must be glued. Failure to comply could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage..

! WARNING
Asphyxiation Hazard. All polypropylene vent systems rely on gaskets for sealing. Ensure gaskets are installed in each female end of vent pipe or fitting. Failure to make proper joint connections could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.
1. Vent terminates outside building in coupling or end pipe pointing upward. Air terminates outside building in downward-facing elbow. Use two 90° elbows or 180° bend for air terminal. Air terminal may be to left, right, or below vent terminal as long as clearances in Figure 9-1 are maintained.
2. Screens on vent and air intake terminals are generally recommended. Use 1/2 in. (12 mm) mesh stainless steel for CPVC/PVC or listed screens for polypropylene.
3. Vent terminal minimum 12 in. (305 mm) above air terminal.
4. Required CPVC/PVC vent pipe and fittings listed in Table 7-11. Polypropylene listed in Tables 7-16 and 7-17.
5. Alternate terminal arrangement with vertical vent and sidewall air intake is permitted. See Figure 9-5.

24″ (610mm) Min.
10′ (3.1m) 0″
Min.

12″ (305mm) Min. 12″ (305mm) Min.

Roof or Snow line

From boiler vent connection

To boiler air connection

Figure 9-1: Fittings Terminal

30

110331-03 – 1/22

PHTM II
9 Vertical Direct Venting (continued)

Combi Installation, Operating & Service Instructions

Table 9-2: Polypropylene Vertical Terminal Fittings

DuraVent PolyPro

Centrotherm InnoFlue

Selkirk PolyFlue

UV resistant single wall pipe + 2PPS-BG screen

UV stabilized UV resistant

end pipe +

pipe + 2PF-

IASPP02 screen HVST screen

Note: 2 in. (60 mm) components shown. Replace “2” with “3” for 3 in. (80 mm) part numbers.

DuraVent & Selkirk: Remove gasket to install screen
Screen

Elbow

Joint Connector

Coupling Screen

Elbow Screen

Roof Flashing

From boiler vent connection

To boiler air connection

Figure 9-3: CPVC/PVC Fittings Terminal Assembly

6. Assembly
A. Use appropriately sized roof flashing to maintain proper clearance and provide weather-tight seal.
B. If venting with polypropylene
i. Use UV resistant or UV stabilized components for all exterior pipe and fittings.
ii. Remove gasket from terminal fitting to install screen.
7. Brace exterior vertical runs of piping as required.

Roof Flashing

From boiler vent connection

To boiler air connection

Figure 9-4: Polypropylene Fittings Terminal Assembly

10′ (3.1m) 24″ (610mm) Min

PVC Coupling or Polypropylene end pipe with screen

Fire Stop listed for use with vent system

Normal snow line on roof

Vent Pipe

Boiler

Air Intake Pipe

Elbow with screen
12″ (305mm) Min
Grade/Snow Line

110331-03 – 1/22

Figure 9-5: Alternate Vertical Vent/Sidewall Air Terminal
31

PHTM II Combi Installation, Operating & Service Instructions

9 Vertical Direct Venting (continued)
CPVC/PVC Concentric Terminal
! WARNING
Asphyxiation Hazard. All CPVC/PVC vent joints must be glued. Failure to comply could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.

! WARNING
Asphyxiation Hazard. If using stainless steel screw to attach rain cap, always drill clearance hole in rain cap and pilot hole in vent pipe appropriate for screw size to avoid cracking PVC components. Failure to comply may cause product damage or improper operation, resulting in substantial property damage, or death.
Vent
Location of optional screen

1. Concentric vent terminals listed in Table 8-9 may be used to terminate air and vent outside building per Figure 9-6. Both air and vent pipes must attach to terminal kit.
2. Required vent pipe and fittings listed in Table 7-11.
3. Follow terminal manufacturer’s instructions and Figure 9-7 for assembly.

Combustion air Roof Line

Rain Cap
Outer Pipe Inner Pipe Storm collar and Roof Flashing or equivalent (field supplied)

12″ (305mm) Min. (USA) 18″ (460mm) Min. (Canada) 24″ (610mm) Max.

Roof or snow line

From boiler vent connection

To boiler air connection

Figure 9-6: CPVC/PVC Concentric Terminal

4. If needed, terminal can be shortened. Follow terminal manufacturer’s instructions and Figure 8-12.

! WARNING
Asphyxiation Hazard. Ensure rain cap is installed before operating boiler. Operation without rain cap installed could cause product damage or improper operation, resulting in severe personal injury, death or substantial property damage.

Clamp or Strap (field supplied)
Wye Fitting

Elbow (field supplied)

Vent

Combustion air

Figure 9-7: CPVC/PVC Concentric Vertical Installation
! WARNING
Do not install U-bend or any other fittings on terminal rain cap. Failure to comply could cause product damage or improper operation, resulting in severe personal injury, death or substantial property damage.

Figure 9-8: Do Not Install U-bend or any other

Fittings on Terminal Rain Cap

32

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions

9 Vertical Direct Venting (continued)
Polypropylene Concentric Terminal
! WARNING
Asphyxiation Hazard. All polypropylene vent systems rely on gaskets for sealing. Ensure gaskets are installed in each female end of vent pipe or fitting. Failure to make proper joint connections could cause products of combustion and/or carbon monoxide to enter the building, resulting in severe personal injury, death or substantial property damage.

Abandoned B-vent Chase
! WARNING
Asphyxiation Hazard. · Only abandoned (unused) B-vent may be used as a chase. Failure to comply may cause product damage or improper operation resulting in severe personal injury, death or substantial property damage. · Do not use flexible polypropylene outside of B-vent chimney. Failure to comply may cause product damage or improper operation resulting in severe personal injury, death or substantial property damage.

1. Concentric terminals listed in Table 9-9 may be used to terminate air and vent outside building per Figure 9-10. Both air and vent pipes must attach to terminal kit.
2. Required vent pipe and fittings listed in Tables 7-16 and 7-17.
3. One polypropylene to PVC adapter required. Install at terminal air pipe connection if using PVC air pipe. Install at boiler air connection if using polypropylene air pipe.
4. Follow terminal manufacturer instructions for assembly.

Table 9-9: Polypropylene Concentric Vertical

Terminal Components

Length

DuraVent PolyPro

Centrotherm InnoFlue

Selkirk PolyFlue

2 in. (60 mm)

2PPS-VKC (black) or 2PPS-VK-TCC (terracotta)

ICRT2439 terminal + ICTCR24 twopipe adapter

2PF-VCT terminal + 2PF-CTA twopipe adapter

3 in. (80 mm)

3PPS-VKC (black) or 3PPS-VK-TCC (terracotta)

ICRT3539 terminal + ICCT3503 twopipe adapter

3PF-VCT terminal + 3PF-CTA twopipe adapter

Polypropylene Concentric Vertical Terminal (DuraVent shown)

12″ (305mm) Min.

Roof or Snow line

From boiler vent connection

To boiler air connection

Figure 9-10: Polypropylene Concentric Terminal

110331-03 – 1/22

1. Abandoned B-vent may be used as an air chase with flexible polypropylene vent pipe only if all of the following conditions are met:
A. B-vent must be clean and in good condition.
B. B-vent inside diameter 6 in. (150 mm) or larger.
C. All B-vent joints and seams must be sealed with RTV silicone.
Use DuraVent or Centrotherm concentric terminal and flexible polypropylene listed in Table 9-11 to terminate air and vent outside building per Figure 9-12 and 9-13.
NOTICE: Selkirk components may only be used with a sidewall air termination.
2. If any of above conditions is not met, terminate air piping through sidewall using PVC or polypropylene fittings per Figure 9-14.
3. Required vent pipe and fittings listed in Tables 7-16 and 7-17.
4. Do not count concentric termination when calculating equivalent length.
5. Follow terminal manufacturer instructions for assembly.
6. Air connection for B-vent air chase:
A. Install tee same size as B-vent on base of B-vent with cap in side of tee. Connect PVC air pipe to side of tee using a PVC socket x male thread adapter. Cut clearance hole in cap, insert PVC adapter, and install electrical conduit locknut to secure. Seal all joints with RTV silicone.
B. DuraVent: Install PolyPro lower B-vent adapter in base of tee.
C. Centrotherm: Install cap in base of tee. Route smooth section of InnoFlue flex through cap in base of tee. Use wall plate and RTV silicone to seal this penetration.
33

PHTM II Combi Installation, Operating & Service Instructions

9 Vertical Direct Venting (continued)

Table 9-11: Polypropylene B-vent Chase Components

DuraVent PolyPro
2PPS-VFTC flex termination cap + 2PPSBV* adapter + 2PPS-FLEX** flex length

Centrotherm InnoFlue

Selkirk PolyFlue

IFBK02** B-vent kit + IAWP02BP wall plate

2PF-10UV or 2PF-39UV rigid pipe + 2PFHVST screen + 2PF-FLEX flex length + 2PFBVSC storm collar

• Size of B-vent (in.), e.g. 2PPS-BV6 for 6 in. B-vent ** Length (25, 35, or 50 ft.) e.g. 2PPS-FLEX25 for 25
  ft. length Note: 2 in. (60 mm) components shown. Replace “2” with “3” for 3 in. (80 mm) part numbers.

10′ (3.1m)
24″ (610mm) Min 12″ (305mm) Min

Centrotherm Innoflue IFBK02 or IFBK03 B-Vent Kit
B-Vent Flashing
Normal snow line on roof

PPs Flex
Fire Stop listed for use with B-Vent

B-Vent

Centrotherm Innoflue Vent Pipe

B-Vent tee with cap and PVC thread adapter (See Text)

Base PVC Air Intake Pipe

IACGE02 or IACGE03 Gasket in B-Vent Cap
Support Bracket

Boiler

10′ (3.1m)

24″ (610mm)
Min

12″ (305mm)
Min

PPs Flex
Fire Stop listed for use with B-Vent

Duravent Polypro Vent Pipe

Duravent Polypro 2PPS-VFTC or 3PPS-VFTC Vertical Flex Termination Cap
B-Vent Flashing Normal snow line on roof
B-Vent
B-Vent tee with cap and PVC thread adapter (See Text)
Flex Male Adapter

Air Intake Pipe

Boiler

Notes: 1. All B-Vent joints must be sealed with RTV. 2. Seal the Flex Male Adapter to the inside of the lower B-Vent Adapter with RTV. 3. Seal the Air Intake Pipe to the B-Vent Cap with RTV.

Figure 9-12: DuraVent Polypropylene B-vent Air Chase System

Figure 9-13: Centrotherm Polypropylene B-vent Air Chase System

10′ (3.1m)
24″ (610mm) Min 12″ (305mm) Min
PPs Flex Fire Stop listed for
use with B-Vent

Duravent Polypro 2PPS-VFTC or 3PPS-VFTC Vertical Flex Termination Cap
B-Vent Flashing Normal snow line on roof
B-Vent

Duravent Polypro Vent Pipe

Air Intake Pipe

Note: Duravent Polypro Flex components shown.
Outside Wall
Elbow with Screen
12″ (305mm) Min

Boiler

Grade/Snow Line

Figure 9-14: Polypropylene B-vent Chase with Sidewall Air Terminal

34

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions

9 Vertical Direct Venting (continued)
Abandoned Chimney Chase

Vent

Note: Duravent Polypro Flex components shown.

! WARNING
Asphyxiation Hazard. Only abandoned (unused) masonry chimney may be used as a chase. If chimney contains multiple flues, all flues must be abandoned. Failure to comply could cause product damage or improper operation resulting in severe personal injury, death or substantial property damage.
! WARNING
Asphyxiation Hazard. Do not use flexible polypropylene outside of masonry chimney. Failure to comply could cause product damage or improper operation resulting in severe personal injury, death or substantial property damage.

Clean, tight unused chimney
Base support and elbow for PPs flex pipe
Exterior Wall Plate

PPs Flex

Duravent Polypro Vent Pipe Air Intake Pipe
Boiler

Outside Wall Elbow with screen 12″ (305mm) Min
Grade/Snow Line

Figure 9-16: Masonry Chimney Chase System

1. Abandoned chimney may be used as a chase with flexible polypropylene vent pipe only if all of the following conditions are met:

A. Chimney is structurally sound and in good condition.

B. No other appliances or fireplaces are vented into chimney or adjacent flues.

Use concentric terminal and flexible polypropylene listed in Table 9-15 to terminate vent outside building. Terminate air through sidewall using PVC or polypropylene fittings. See Figure 9-16.

2. Follow vent system manufacturer’s instructions for assembly.
Table 9-15: Polypropylene Masonry Chimney Chase

Components

DuraVent PolyPro

Centrotherm InnoFlue

Selkirk PolyFlue

2PPS-FKC chimney kit + 2PPS-FLEX*
flex length

IFCK02* chimney kit with flex length

2PF-FLEX-KIT chimney kit + 2PF-
FLEX length

• Length (25, 35, or 50 ft.), e.g. 2PPS-FLEX25 for 25 ft. length
  Note: 2 in. (60 mm) components shown. Replace “2” with “3” for 3 in. (80 mm) part numbers.

WITH CROWN 45° MAX

BOILER

CHIMNEY AND FOUNDATION ARE STRUCTURALLY SOUND

Figure 9-17: Masonry Chimney Chase Requirements

BOILER

110331-03 – 1/22

Figure 9-18: Masonry Chimney Chase and Any Adjacent Flues must be Abandoned 35

PHTM II
10 Heating System Piping

Combi Installation, Operating & Service Instructions

General System Piping Precautions
! WARNING
Asphyxiation Hazard. · Failure to properly pipe boiler could cause
improper operation and damage to boiler or building resulting in severe personal injury, death or substantial property damage. · Protect gas ignition system components from water (dripping, spraying, rain, etc.) during boiler operation and service (circulator replacement, condensate trap cleaning, control replacement etc). · Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components and could lead to premature boiler failure. Warranty does not cover problems caused by oxygen contamination of boiler water or scale (lime) build-up caused by frequent addition of water. · Maintain clearances to system piping per Figure 5-1.
! CAUTION
Toxic Material. The heat transfer medium must be water or other nontoxic fluid having a toxicity rating or Class of 1, as listed in Clinical Toxicology of Commercial Products, 5th edition.
Standard Piping Components
1. Safety relief valve (required). A. Shipped loose in parts carton (30 psig [207 kPa]). B. Pipe outlet of safety relief valve to location where water or steam will not create a hazard or cause property damage if valve opens. (The end of discharge pipe must terminate in unthreaded pipe.) C. If safety relief valve discharge is not piped to drain, it must terminate within 6 in. (150 mm) of floor. D. Do not route discharge piping through an area that is prone to freezing temperature. E. Termination of safety relief valve must be in an area where it is not likely to become plugged by debris.
36

F. If replaced, replacement must have a setting less than or equal to maximum allowable working pressure (MAWP) shown on ASME data plate located on left side of heat exchanger (50 psig [345 kPa]).
! WARNING
Burn Hazard. Safety relief valve discharge piping must be piped near floor to eliminate potential of severe burns. Do not pipe in any shut-off valves between: 1. Safety relief valve and boiler. 2. Safety relief valve and discharge. Union may be installed in safety relief valve piping.
2. Pump (required)
Boiler loop pump is factory installed inside boiler cabinet. At least one additional pump is required on system side.
3. Expansion tank (required)
A. If this boiler is replacing an existing boiler with no other changes in system, old expansion tank can generally be reused.
B. If expansion tank must be replaced, consult expansion tank manufacturer’s literature for proper sizing.
C. If using antifreeze, account for additional expansion of glycol solution when sizing an expansion tank. In a typical residential heating system, a glycol mixture has an expansion rate of 1.2 times that of water alone, therefore a tank for an anti-freeze system should be at least 1.2 times greater in size. Antifreeze should be stainless steel compatible.
4. Fill valve (required)
A. Either a manual or automatic fill valve may be used, but a manual valve is preferred because it eliminates unmonitored additions of make-up water to the system.
B. Ideal location for fill valve is at expansion tank.
C. If using antifreeze with automatic fill valve, it is recommended to install a water meter to monitor make-up water. Antifreeze concentration will decrease as make-up water is added. If using antifreeze, local codes often require a backflow preventer or disconnect from city water.
110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
10 Heating System Piping (continued)

5. Automatic air vent (required)
A. Factory installed manual air vent is included on boiler heat exchanger, to vent heat exchanger. A system air vent is also required.
B. Manual air vents will usually be required in other parts of the system to remove air during initial fill.
6. Manual reset high limit (required by some codes i.e. ASME CSD-1)
A. Install high limit in boiler supply piping just above boiler with no intervening valves.
B. Set manual reset high limit to 200°F. Wire limit to “external limit” terminal on low voltage connection board per Section 13 Field Wiring.
7. Isolation valves are useful when boiler must be drained, as they will eliminate having to drain and refill entire system.
8. Dirt and magnetic filter (strongly recommended)
A. Install a dirt/magnetic filter to prevent any system debris from entering boiler and fouling of water passages.
B. Note that some filters have a significant pressure drop, which may impact ability of system pump to obtain required flow.
9. Drain valve (required)
Install drain valve as shown in Figure 10-2.
10. Low water cut-off (LWCO) (may be required by local jurisdiction)
A. Protection of this boiler against low water and/ or inadequate flow is provided by UL353 listed flow switch built into boiler.

B. This is a water tube boiler and this flow switch is therefore only effective way to provide such protection.
C. Section HG614(c) of ASME Boiler and Pressure Vessel Code recognizes use of a listed flow switch in lieu of LWCO on water tube boilers.
D. In event a local jurisdiction insists upon installation of LWCO with this boiler, refer to Section 13 Field Wiring and LWCO manufacturer’s instructions for proper wiring.
· Auto reset LWCO: 105591-01
· Manual reset LWCO: 108182-01
E. Install LWCO in supply piping at point prescribed by the local jurisdiction (generally at a point above boiler, in common header piping).
F. If probe type LWCO is used, be certain that it is located at a point in piping from which air can escape to an automatic air vent.
G. Generally, this means there should be no down-turns in piping between LWCO and point where automatic air vent is installed.
H. Failure to do this may result in nuisance boiler shut-downs due to small amounts of air trapped around probe.
NOTICE: Installing LWCO at top of boiler in relief valve location may cause nuisance shut-downs.
11. Low Loss Header (supplied with this boiler) provides instant primary- secondary connection.

T/P Gauge (1/4″ NPT)

Gaskets

1″ Copper
System Supply (1-1/4″ sweat)

Boiler Supply Connection (G 3/4″)
Boiler Return Connection (G 3/4″)
Low Loss Header

Combi Block Drain (hydronic side)
System Return (1-1/4″ sweat)

Figure 10-1: Low Loss Header Connections

110331-03 – 1/22

37

PHTM II Combi Installation, Operating & Service Instructions
10 Heating System Piping (continued)

38

Boiler Supply Connection (G 3/4″)

BoBileorileRreStuurpnpClyoCnnoencnteiocntion (G(3G/43″)/4″)

Boiler Return Connection (G 3/4″)

T&P Gauge (1/4″ NPT)

T&P Gauge (1/4″ NPT)

To System

System

System

Supply

Return

at)

(1-1/4″ sweat)

(1-1/4″ sweat)

Low Loss Header

Low Loss Header

System Return (1-1/4″ sweat)

System Pump w/ Integral Flow Check Valve

System Pump w/ Integral Flow Check Valve

To System
Manual Air Vent (inside boiler)
Boiler Pump (inside boiler)
System Pump w/ Integral Flow Check Valve
Air Separator

Safety Relief Valve
Manual Air Vent (inside boiler)
Boiler Pump* (inside boiler)
System Pump w/ Integral Flow Check Valve
Air Separator

Safety Relief Valve* From System

From System

To System

To System

Dirt & Magnetic Filter (highly recommended)

Dirt & Magnetic Filter (highly recommended)

System Zone Valves
Heating System Pump

System Zone Valves
Fill Valve

Heating System Pump

Backflow Preventer

Temperature & Pressure Gauge*

Low Loss HeaTdeemrperature & Pressure Gauge

Low Loss Header*

Fill Valve

Drain Valve*

Cold Water Fill Backflow Preventer
Expansion Tank

Drain Valve Supplied with boiler Cold Water Fill
Expansion Tank

• Supplied with boiler

Optional Zone Valve Controlled System

Optional Zone Valve Controlled System

NOTICE: Domestic water piping omitted for clarity. NOTICE: Installer is responsible for piping configurations to provide proper flow rates and
meet local codes. NOTICE: Primary-secondary piping is required.
! CAUTION
Burn Hazard. Property Damage. Under some conditions this boiler can deliver water to heating system that is significantly higher than boiler setpoint. Where such overheat could cause personal injury or property damage (e.g. low temperature radiant floor zones), protect system from excessive temperatures using tempering valves or other means.

! CAUTION
Component Damage. Excessive heat from soldering could damage gaskets at connection between low loss header and boiler. Solder connections to low loss header before installing gaskets.

Figure 10-2: Heating System Piping

110331-03 – 1/22

PHTM II
11 Domestic Water Piping

Combi Installation, Operating & Service Instructions

! DANGER
Scald Hazard. · Under certain conditions this boiler can deliver domestic hot water (DHW) at temperatures in excess of DHW set point on boiler control. A field supplied ASSE 1017 or ASSE 1070 certified tempering valve is therefore REQUIRED as part of this boiler’s installation. · Select and install tempering valve in accordance with valve manufacturer’s instructions and applicable local codes. In absence of such codes follow Uniform Plumbing Code (IAPMO/UPC-1). Also note additional tempering valves may be required at fixtures themselves. NOTICE: DHW feature on this boiler is designed to only heat potable water (i.e. water from a well or water utility that is suitable for drinking) having following characteristics: · Hardness less than 12 grains/gallons · pH between 6 and 8 · Chlorides less than 80 PPM Use of water not having these characteristics could result in premature failure of DHW handling components in this boiler and is not covered under warranty. If there is reason to believe water is contaminated in any way, discontinue use of domestic hot water and contact a qualified, licensed water treatment professional.
! CAUTION
Component Damage. · Internal components near Hot and Cold connections can be damaged by excessive heat during soldering. Use precautions to limit heat exposure. · Failure to do so could cause internal leaks resulting in damage to boiler.
Combi connections are G1/2″. Adapters to 3/4″ sweat connection are provided in parts carton (Figure 11-1).
Gasket
Gasket
DHW Connector (Fits 3/4″ Female Socket Elbow)
Figure 11-1: DHW Connections 110331-03 – 1/22

NOTICE: Elbows pointed toward back of boiler are recommended to start DHW piping.
DHW components in this system and their functions are as follows: 1. ASSE 1070 or ASSE 1017 listed tempering
valve (required) Low draw rates and transitions from heating to DHW are two examples of conditions that can cause temperature of water leaving boiler to significantly exceed DHW set point. A tempering valve is required to minimize spikes in DHW temperature. Select and install in accordance with valve manufacturer’s instructions and applicable codes. 2. Flow limiter If DHW draw rate is in excess of rating in Table 3-1, temperature of hot water may be too low for comfortable use. Internal, 6 GPM (23 L/min), flow limiter is factory installed, but an additional flow limiter may be required. Select one having a flow rating approximately equal to that shown in Table 3-1 at desired temperature rise. 3. DHW pressure relief valve Limits pressure in DHW piping. Use a valve designed for DHW service such as Watts #3L or #53L. Select a valve with a pressure setting less than or equal to 145 psig (1,000 kPa). Pipe discharge to safe location using same size as discharge connection to valve. 4. Drain valve Permits plate heat exchanger to be periodically back flushed to remove sediment. 5. Globe or ball valves Used to isolate DHW piping during back flushing and other servicing. In addition, valve may be used to limit DHW flow if necessary. 6. Expansion tank If back flow preventer or check valve is installed upstream of cold connection, thermal expansion tank will prevent build-up of pressure in DHW piping. Use an expansion tank designed for potable water service. 7. Water filter (highly recommended) Install Aqua Pure AP430SS or equivalent on potable cold water supply to prevent scale. 8. Buffer tank (Optional) When recirculation line is installed as shown in Figure 11-3, a small (2-6 gal) potable water storage tank may be installed as shown. Reduces burner cycling during very small DHW demands and also helps minimize temperature fluctuations. An unpowered storage electric water heater is ideal for this application.
39

110331-03 – 1/22

40

DHW Flow Limiter* (inside boiler)
DHW Pressure Relief Valve Drain Valve
ASSE 1017 or ASSE 1070 Listed Tempering Valve (required)

NOTICE: Heating System piping omitted for clarity. NOTICE: Installer is responsible for piping configurations to provide proper flow rates and
meet local codes.
! DANGER
Scald hazard. Under certain conditions this boiler can deliver domestic hot water (DHW) at temperatures in excess of DHW setpoint in boiler control. A field supplied ASSE 1017 or ASSE 1070 listed tempering valve is required as part of this boiler’s installation.

*Supplied with boiler

! CAUTION
Component Damage. Excessive heat from soldering could damage gaskets at connection between DHW adapters and boiler. Solder connections to DHW adapters before installing gaskets.

DHW Strainer* (inside boiler)

Hot Water (From Boiler)

Cold Water Supply

DHW Adapters* (G 1/2″ to 3/4″ sweat)

Drain Valve

Hot Water To Fixtures
Detail A
(Scale 1 : 4)

NOTICE: Water filter to prevent scale is strongly recommended on the potable cold water supply line to minimize sediment build up and loss of performance of the plate heat exchanger.
Cold Water Supply
A
Water Filter Aqua Pure AP430SS or equivalent (highly recommended)

Expansion Tank (Req’d if cold water supply has check valve)
Hot Water To Fixtures
Figure 11-2: Standard DHW Piping

PHTM II Combi Installation, Operating & Service Instructions
11 Domestic Water Piping (continued)

41

110331-03 – 1/22

DHW Flow Limiter (inside boiler)
DHW Adapters (G 1/2″ to 3/4″ sweat)
DHW Pressure Relief Valve
Drain Valve
Buffer Tank (2-6 Gal.) (optional)

NOTICE: Heating System piping omitted for clarity. NOTICE: Installer is responsible for piping configurations to provide proper flow rates and
meet local codes.
! DANGER
Scald hazard. Under certain conditions this boiler can deliver domestic hot water (DHW) at temperatures in excess of DHW setpoint in boiler control. A field supplied ASSE 1070 listed anti-scald valve is required as part of this boiler’s installation when DHW recirculation issued.

*Supplied with boiler

! CAUTION
Component Damage. Excessive heat from soldering could damage gaskets at connection between DHW adapters and boiler. Solder connections to DHW adapters before installing gaskets.

DHW Strainer* (inside boiler)

Hot Water To Fixtures

Recirc. Temp. Sensor (P/N 108703-01)

Recirc. Pump

Hot Water (From Boiler)

Cold Water Supply

Drain Valve

Flow Check Valve

Hot Water To Fixtures
Detail A
(Scale 1 : 4)

ASSE 1070 Listed Anti-Scald Valve (required)

NOTICE: Additional wiring and control settings required for DHW recirculation:

· Connect recirculation pump to “Aux Pump” terminals per Figure 13-2.

Cold Water Supply

· Connect jumper, time of day clock or momentary push button to “Aux

A

T’Stat” terminals per Figure 13-3.

Water Filter Aqua Pure AP430SS or equivalent (highly recommended)

· Secure recirculation temp sensor close to boiler on cold water line. · Connect recirculation temperature sensor to “Header Sensor” terminals

Expansion Tank (Req’d if cold water supply line has check valve)

per Figure 13-3. · Turn DHW comfort mode “on”. See Section 16 Operation and Table 16-11.

NOTICE: Water filter to prevent scale is strongly recommended on the

potable cold water supply line to minimize sediment build up and loss of

performance of the plate heat exchanger.

Figure 11-3: DHW Piping with Recirculation

PHTM II Combi Installation, Operating & Service Instructions
11 Domestic Water Piping (continued)

12 Gas Piping

PHTM II Combi Installation, Operating & Service Instructions

! WARNING
Explosion Hazard. · Failure to properly pipe gas supply to boiler could cause improper operation or leaks of flammable gas resulting in severe personal injury, death or substantial property damage.
· Gas supply to boiler and system must be shut off prior to installing or servicing boiler gas piping.
1. Gas piping must be sized to deliver adequate gas for boiler operation. Consider the following:
A. If gas pressure in building is above 1/2 psig (3.4 kPa), an additional gas pressure regulator is required. If additional regulator is used to reduce boiler inlet pressure, it must be at least 6 to 10 ft. (1.8 to 3.0 m) upstream of boiler.
B. Pressure drop from point of delivery to boiler. See Table 3-4 for inlet gas pressure requirements.
C. Existing and expected future gas using equipment (i.e. water heater, cooking equipment, etc.).
2. Use methods and materials in accordance with local plumbing codes. In absence of such requirements, follow NFPA 54/ANSI Z223.1 National Fuel Gas Code and/or CAN/CSA B149.1 Natural Gas and Propane Installation code. Figure 12-1 shows typical gas piping and connection to boiler.
A. Use thread compound compatible with liquefied petroleum gas.
B. A sediment trap must be installed upstream of gas controls.
C. A manual shut-off valve (provided in parts carton) must be installed within 6 ft. (1.8 m) of boiler.
D. Support weight of gas piping independently from boiler gas connection.
3. Boiler and its gas connection must be leak tested before placing boiler in operation.
A. For pressure testing at equal to or less than 1/2 psig (3.4 kPa) close manual shut-off valve.
B. For pressure testing above 1/2 psig (3.4 kPa) disconnect boiler and manual shut-off valve.

! DANGER
Explosion Hazard. Do not use matches, candles, open flames or other ignition sources to check for leaks. Failure to comply could result in severe personal injury, death or substantial property damage. C. Locate leaks using listed combustible gas
detector, a non-corrosive leak detection fluid or other listed leak detection method. Repair any leaks found immediately.
Gasket Gas Valve Adapter (1/2″ NPT) Ground Joint Union
Direction of Gas flow Manual Shutoff Valve
3″ Min. Drip Leg
Cap
Figure 12-1: Gas Piping

42

110331-03 – 1/22

13 Field Wiring

PHTM II Combi Installation, Operating & Service Instructions

! DANGER
Electrical Shock Hazard. · Disconnect electrical supply before installing or performing maintenance. · Electrical power may be supplied from more than one circuit. ·Lock out all electrical boxes with padlock once power is turned off.
! WARNING
Electrical Shock Hazard. All wiring and grounding must conform to requirements of authority having jurisdiction or, in absence of such requirements, to National Electrical Code/NFPA 70 or Canadian Electrical Code, Part 1 (CSA C22.1 – latest edition). · Make electrical connections according to boiler’s wiring diagram and instructions. Failure to properly wire electrical connections to the boiler may result in severe personal injury, death or substantial property damage. · Protect each boiler circuit with a properly sized over-current device. · Never jump out or bypass any safety or operating control or component of this boiler.
NOTICE: Internal wiring diagrams contained in this manual are for reference only. Each boiler is shipped with a wiring diagram sheet within boiler literature packet. Read, understand and follow this wiring diagram and wiring diagrams of any field supplied controls.
NOTICE: Boiler is equipped with a UL 353 listed high water temperature limit. This limit provides boiler shutdown in event boiler water temperature exceeds set point of control. Certain local codes require an additional water temperature limit. If necessary, install an additional water temperature limit (Honeywell L4006 Aquastat). Wire as indicated in Figure 13-3.

Locating Field Connection Terminal Strips
Field connection terminal strip locations are shown in Figure 13-1. To access terminal strips:
1. Remove front door. Front door is removed by first loosening two thumb screws located under front of door.
2. Disconnect igniter wire at burner door.
3. Pull control enclosure forward, then to the left and allow it to swing down into the service position.

Gas Valve

Combi Pump

Low Voltage Connection Board 120 VAC Connection Board

Jacket Knockouts

Jacket Knockouts

Opened Control Enclosure

Figure 13-1: Location 120VAC and low voltage connection boards
Field 120VAC Connections
1. Provide a dedicated circuit for boiler of 15A or greater. A service switch is recommended and is required by many local codes. Locate this switch in accordance with local codes or, in absence of such requirements, in a location where it can be safely accessed in an emergency.
2. All 120VAC connections to boiler are made on 120VAC Connections terminal strip (see Figure 132) located on right side of bottom panel. Route all 120 VAC wiring through conduit knock out holes located on right side in front of terminal strip.

110331-03 – 1/22

43

13 Field Wiring (continued)

LN 120V
Line

LN Boiler
Pump

LN System
Pump

LN Aux
Pump

PHTM II Combi Installation, Operating & Service Instructions
Low Voltage Connections
1. All low voltage field connections to boiler are made on Low Voltage Connections terminal strip (see Figure 13-3) located on left side of bottom panel. Route all low voltage wiring through conduit knock out holes located on left side in front of terminal strip.

Service Switch

Overcurrent Protection/ Disconnect

GND

L1 L2 Power Supply
120/60/1

Figure 13-2: 120 VAC Connections

From left to right, connections on terminal strip are:

Terminal

Description

120VAC L

Hot

120VAC N Boiler Pump L

Neutral Not used on Combi

Boiler Pump N

Not used on Combi

System Pump L

Hot

System Pump N

Neutral

Auxiliary Pump L

Hot

Auxiliary Pump N

Neutral

3. Pump outputs

A. System Pump: (field supplied) Circulates water through radiation. System pump is always on when boiler is responding to heating demand. Refer to Table 16-15 for alternate system pump output functions. Maximum recommended current draw for system pump is 1.5A.
B. Auxiliary Pump: (“Recirculation pump”) (field supplied) Circulates water through a DHW recirculation loop. Auxiliary pump output can be used for 2nd zone or indirect pump. Refer to Table 16-15 for more information and alternate auxiliary pump output functions. Maximum recommended current draw for auxiliary pump is 1.5A.

C. Maximum combined current draw for all circulators is 5A. Internal boiler pump draws a maximum of 2A.

44

Figure 13-3: Low Voltage Connections

From left to right, connections on terminal strip are:

Terminal

Description

Heat T’Stat 24VAC thermostat (R – 24V “Hot”)

Heat T’Stat

24VAC thermostat (W – Energized on Call for Heat)

Heat T’Stat 24VAC thermostat (C – 24V Common)

Aux T’Stat 24VAC thermostat (R – 24V “Hot”)

Aux T’Stat

24VAC thermostat (W – Energized on Call for Heat)

External Limit

Field supplied safety limit contacts (1)

External Limit

Field supplied safety limit contacts (2)

0-10 V 4-20mA

Optional remote modulation control* (+)

0-10 V 4-20mA

Optional remote modulation control* (-)

Header Optional Recirculation (Header*) Temperature Sensor Sensor (1)

Header Optional Recirculation (Header*) Temperature Sensor Sensor (2)

Outdoor Sensor

Optional Outdoor Temperature Sensor (1)

Outdoor Sensor

Optional Outdoor Temperature Sensor (2)

*Not available with local user display.

110331-03 – 1/22

13 Field Wiring (continued)

PHTM II Combi Installation, Operating & Service Instructions

2. External power must not be applied to any low voltage terminals – doing so may damage boiler control. Note following:
A. Heat T’Stat (field supplied) – Connect room thermostat or zone panel end switch (isolated contact only) to “Heat T’stat” terminals.
B. Aux T’Stat – Connect jumper, common recirculation timer (field supplied) or point of use push button (field supplied). Auxiliary T’Stat can also be used for 2nd zone or indirect demand. Refer to Table 16-13 for explanation.
C. External Limit: External limit terminals are intended for use with field supplied safety device, such as a manual reset high limit or LWCO. When an external limit is used, jumper between these two terminals must be removed.
D. Outdoor Sensor – Use only Tasseron TSA00AA (P/N 108681-01) 10k outdoor sensor. When optional sensor is connected, boiler control will provide outdoor air sensor based freeze protection interlocks. When placing sensor, consider following:
i. Locate sensor on outside of building.
ii. Avoid placing sensor in areas where it may be covered with ice or snow.
iii. Avoid direct radiation from sun.
iv. Avoid placing sensor near potential sources of electrical noise such as transformers, power lines, and fluorescent lighting.
v. Wire sensor to boiler using minimum 22 AWG wire.
vi. Where electrical noise sources cannot be avoided, wire sensor using 2 conductor, UL Type CM, AWM Style 2092 shielded cable. Connect one end of shielding on this cable to ground.
E. Recirculation (Header) Temperature Sensor When optional sensor is installed and Comfort Mode is enabled, boiler will attempt to maintain target domestic hot water recirculation temperature in recirculation piping. Use only Honeywell 32003971003 (P/N 108703-01) sensor. Locate sensor as shown in Figure 11-3. Wire sensor using a 2 conductor, UL Type CM, AWM Style 2092, 300Volt 60°C shielded cable. Connect one end of shielding on this cable to ground. See Table 16-11 for information on enabling recirculation sensor.
110331-03 – 1/22

F. LWCO wiring – Although not necessary to protect this boiler, some jurisdictions may require installation of LWCO with this boiler.
i. Refer to Section 10 Heating System Piping for LWCO kits available from manufacturer.
ii. LWCO from these kits is installed to 4 pin connector on Low Voltage Connections terminal strip.
G. RJ45 Connections – Boiler-to-Boiler communication network is used for multiple boiler (“Lead-Lag”) installations.
Note: Combi boilers may only be used as slaves in such a system. Refer to Table 16-16 for information on enabling this feature. Boiler lead/lag sequencer connection is made directly to control. Refer to Figure 13-4.

RJ45 Connections (2)

X6 X5

BCC

X4 X3

XB-2 XB-1

X1 Fuses
X2

Figure 13-4: Boiler-to-Boiler Connections

45

14 Condensate Disposal

PHTM II

Combi Installation, Operating & Service Instructions

! WARNING
Asphyxiation Hazard. Failure to install condensate drain in accordance with instructions outlined below could cause products of combustion and/or carbon monoxide to enter building, resulting in severe personal injury, death or substantial property damage.
1. This high efficiency boiler produces condensate.
NOTICE: Condensate is corrosive. Use only materials listed by authority having jurisdiction. In absence of such requirements, PVC and CPVC pipe may be used.
2. 3/4″ PVC condensate drain connection can be solvent welded.
3. Condensate disposal considerations:
A. If required by local codes, install neutralizing filter. Neutralizing kit P/N 101897-01 is available from manufacturer.
B. Do not route or terminate condensate drain line piping through an area that is prone to freezing temperatures or that could be damaged by leaking condensate.

C. If point of condensate disposal is above trap, it will be necessary to use a condensate pump to move condensate from boiler to drain.
In such cases, select a condensate pump that is listed for use with condensing boilers.
Select a pump with an overflow switch to prevent property damage from condensate.
D. Barbed fitting on bottom panel is connected to trap vent and must be unobstructed for trap to work properly.
NOTICE: If condensate drain line becomes obstructed, boiler may leak from condensate trap vent. Consider installing drain pan directly below boiler if such a leak could cause property damage. Pipe drain pan drain to suitable location.

Condensate Trap Vent 3/4″ PVC Connection Condensate Trap Cleanout
Figure 14-1: Condensate Trap

46

110331-03 – 1/22

PHTM II
15 Start-Up and Checkout

Combi Installation, Operating & Service Instructions

Heating System Cleaning and Treatment
! CAUTION
Component Damage. Proper flushing, cleaning, and water side maintenance is highly recommended to protect boiler heat exchanger. Scaling and sediment build up may not be covered under warranty.
1. Prior to fill, flush entire heating system to remove sediment, flux, and traces of boiler additives.
2. Clean with approved cleaners such as the following or its equivalent:
· Fernox Cleaner F3 (for new heating systems)
· Sentinel x300 System cleaner (for new heating systems)
· Sentinel X400 System Restorer (for old closed loop hydronic systems)
Refer to instructions supplied with cleaner for proper dosage and use.
NOTICE: Cleaning system prior to removing old boiler or by isolating new boiler from system while cleaning will yield best results.
3. After system has been cleaned, recommend using approved inhibitors such as the following or its equivalent:
· Fernox F1 Protector
· Sentinel X100 Inhibitor
Refer to instruction supplied with inhibitor for proper dosage and use.
! CAUTION
Component Damage. Avoid use of petroleum based boiler additives and ester- based oils/lubricants. These could attack seals in both boiler and system which could result in property damage.

Fill Water Quality
NOTICE: Make sure system is filled with water meeting the following criteria:
· Hardness less than 7 grains/gallon. · pH between 6.5 and 9.5 (for systems containing
aluminum components, between 6.5 and 8.5) · Chlorides less than 200 PPM. If fill water is
drawn from a system containing a water softener, test a sample of the water to confirm that this criteria is met.
Following appropriate water chemistry guidelines will help extend the life of appliance by reducing effects of lime scale buildup and corrosion, which are not covered by warranty. NOTICE: Minimize introduction of make-up water, dissolved oxygen, and contaminants into boiler by following installation guidelines outlined in Appendix B: Water Quality and Boiler Additives.
Freeze Protection
If freeze protection is required see Appendix B for additional information.
Fill Water System
! WARNING
Burn Hazard. Never exceed maximum allowable working pressure on heat exchanger ASME plate (50 psig [345 kPa]). A 30 psig (207 kPa) safety relief valve is included with this boiler.
1. Fill system ensuring water quality meets requirements of this manual.
2. Pressurize system to at least 12 psig (83 kPa) at boiler. Pressure will vary with each application.
3. Verify air pressure in expansion tank is equal to system pressure.

110331-03 – 1/22

47

PHTM II Combi Installation, Operating & Service Instructions
15 Start-Up and Checkout (continued)

4. Eliminate air in boiler by bleeding from heat exchanger manual air vent on top left side of heat exchanger (Figure 15-1).

A. Use 1/4 in. (6 mm) ID tubing connected to hose barb and route tubing to a safe draining location.

B. Turn vent counter clockwise and allow heat exchanger to vent until a steady stream of water is observed.

C. Close vent and remove hose.

Confirm 1/4″ ID tubing is connected to hose barb. Route tubing to a safe place away from controls before opening vent.

Manual Air Vent

Detail A (Scale 2:1)

Final Check Before Starting Boiler
! WARNING
Asphyxiation Hazard. Burn Hazard. Completely read, understand and follow all instructions in this manual before attempting start-up.
1. Verify that venting, water piping, gas piping and electrical system are installed properly.
2. Confirm vent system is complete and free of obstructions before attempting to fire boiler.
3. Inspect all wiring for loose, uninsulated or miswired connections.
4. Verify boiler and system are full of water and pressurized. Verify pump speed is set to 3. (Figure 15-2) Pump located on right side of boiler.

A

A
Flame Rod

Figure 15-1: Manual Air Vent Location 5. Isolate each zone to purge air confirming that
heating system and boiler are completely filled. 6. Verify automatic air vent located on internal piping
is open and remains open to atmosphere. See Figure 4-1 for location.
48

Figure 15-2: Pump speed setting
NOTICE: When boiler is first powered, control will automatically run a pump purge sequence (status 10) for 2 minutes.
5. Check all gas piping before boiler manual shut-off valve for leaks and purge sections that are filled with air. Refer to NFPA 54/ANSI Z223.1 National Fuel Gas Code and/or CAN/CSA B149.1 Natural Gas and Propane Installation Code for additional information on testing and purging gas lines.
! DANGER
Explosion Hazard. Do not use matches, candles, open flames or other ignition source to check for leaks. Failure to comply could result in severe personal injury, death or substantial property damage.
6. If using LP gas, perform conversion stated below, otherwise skip to Step 7.
110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
15 Start-Up and Checkout (continued)

LP Conversion
! WARNING
Asphyxiation Hazard. · Do not attempt to operate this boiler on LP gas without making proper adjustments to gas valve and control. Do not convert this boiler to LP gas without using a combustion analyzer to verify CO is below 200 ppm air free. (In event of high CO, consult section 19 Troubleshooting). · Failure to properly convert this boiler for use on LP gas could cause unreliable operation at elevated carbon monoxide (CO) levels, resulting in severe personal injury, death or substantial property damage.
LP conversion requires (2) steps: gas valve setting adjustment and control parameter change.
A. Use 2.5 mm hex wrench to adjust gas valve setting from “1” to “2” (Figure 15-3).

C. Apply yellow LP gas conversion label, supplied with boiler literature packet, to jacket beside rating label.
7. Start boiler using lighting instructions in Figure 15-9. With boiler powered up, and with no call for heat, display should look like Figure 15-4. Once a call for heat is present, it will look like Figure 15-5.
Figure 15-4: Home screen at power up (no call for heat)

Figure 15-3: Gas Valve Fuel Setting
B. Use keypad to enter adjust mode and change parameter A06 from “0” to “1”. · Press and hold “menu” for 3 seconds. · Press “” or “” buttons until PAS is visible and press “enter”. · Press “enter” button while PA1 is visible. · Press “+” or “-” buttons until password “86” is reached and press “enter”. Press and hold for five seconds to adjust by increments of 10. · Press “menu” button until PAS is visible. · Press “” button until A is visible and press “enter”. · Press “” or “” buttons until A06 is visible and press “enter”. · Press “+” or “-” buttons to change “0” to “1”. · Press “menu” 3 times to return to display mode.
110331-03 – 1/22

Figure 15-5: Home screen with CH and DHW demands
8. Boiler should attempt to fire several seconds after a call for heat appears. With front door removed, try for ignition will appear as an audible spark (lasting approximately 4 seconds).
9. Upon initial start-up, gas train will be filled with air. Even if gas line has been completely purged of air, it may take several tries for ignition before a flame is established.
10. If boiler does not light after 2 retries for ignition, it will enter a “soft lockout” and will wait for one hour before attempting another ignition sequence. This soft lockout can be reset by interrupting power to boiler.
11. Once a flame has been established for first time, subsequent calls for burner operation should result in a flame on first try.
49

PHTM II Combi Installation, Operating & Service Instructions
15 Start-Up and Checkout (continued)

12. If there is a problem, display will show error code (Figure 15-6). Refer to label on access door and Section 19 troubleshooting to diagnose error.
Figure 15-6: Home screen with error 13. If successful ignition, display will show flame icon
(Figure 15-7)
Figure 15-7: Home Screen While Running 14. Boiler will automatically perform a calibration to
properly set its air-fuel ratio (i.e. O2 or CO2 and CO levels). 15. Check inlet gas pressure (Figure 15-8). Verify inlet gas pressure is between upper and lower limits shown on rating label with all gas appliances on and off. Be sure to close this pressure tapping when gas pressure check is complete.

16. Perform combustion test.
! WARNING
Asphyxiation Hazard. Use a combustion analyzer to verify proper operation by checking carbon monoxide (CO) levels. Failure to use a combustion analyzer could cause operation of boiler with elevated CO levels resulting in severe personal injury, death or substantial property damage.
A. Boiler is equipped with a screw cap in vent adapter. Be sure to replace this cap when combustion testing is complete.
B. Measure carbon monoxide (CO) level after 5 minutes of operation above 50% firing rate. This can be done by providing DHW demand. Ensure door is sealed before taking combustion readings.
C. CO should not exceed 200 ppm air free. (in event of high CO, see Section 19 Troubleshooting).
17. Perform a check of ignition safety shut-off device. With burner firing, carefully unplug black ignitor/ flame sensor wire at burner door using a pair of insulated pliers (Figure 15-1). Burner should shut off immediately.
18. Test any external limits or other controls in accordance with manufacturer’s instructions.
19. Refer to Section 16 Operation to set-up control for system in which boiler is installed. Some common set-up tasks include:
A. Setting CH and DHW temperature set-points.
B. Defining system pump operation.
C. Turn DHW comfort mode “On” (if using DHW recirculation).
20. Review User’s Information Manual and system operation with homeowner.

Inlet Pressure Tapping
Figure 15-8: Gas valve inlet pressure tap 50

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PHTM II Combi Installation, Operating & Service Instructions
15 Start-Up and Checkout (continued)

FOR YOUR SAFETY READ BEFORE OPERATING/POUR VOTRE SECU× RITE L× ISEZ× AVA×NT DE METTRE EN MARCHE
WARNING: If you do not follow these instructions exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
AVERTISSEMENT: Quiconque ne respecte pas à la lettre les instructions dans
la présente notice risque de déclencher un incendie ou une explosion entraînant des dommages, des blessures ou la mort.

A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

A. Cet appareil ne comporte pas de veilleuse. Il est muni d’un dispositif d’allumage qui allume automatiquement le brûleur. Ne tentez pas d’allumer le brûleur manuellement.
B. AVANT DE FAIRE FONCTIONNER, reniflez tout autour de l’appareil pour déceler une odeur de gaz. Reniflez près du plancher, car certains gaz sont plus lourds que l’air et peuvent s’accumuler au niveau du sol.

WHAT TO DO IF YOU SMELL GAS:

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:

– Do not try to light any appliance. – Do not touch any electric switch; do not use any
phone in your building. – Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions. – If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to turn the gas control valve. Never use tools. If the valve will not turn by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

– Ne pas tenter d’allumer d’appareil. – Ne touchez à aucun interrupteur ; ne pas vous servir des
téléphones se trouvant dans le bâtiment. – Appelez immédiatement votre fournisseur de gaz depuis un
voisin. Suivez les instructions du fournisseur. – Si vous ne pouvez rejoindre le fournisseur, appelez le service des
incendies.
C. Ne poussez ou tournez la manette d’admission du gaz qu’à la main ; ne jamais utiliser d’outil. Si la manette reste coincée, ne pas tenter de la réparer ; appelez un technicien qualifié. Le fait de forcer la manette ou de la réparer peut déclencher une explosion ou un incendie.
D. N’utilisez pas cet appareil s’il a été plongé dans l’eau, même partiellement. Faites inspecter l’appareil par un technicien qualifié et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans l’eau.

OPERATING INSTRUCTIONS/ INSTRUCTIONS DE FONCTIONNEMENT

1. STOP! Read safety information above on this label. 2. Set the thermostat to lowest setting. 3. Turn off all electric power to the appliance. 4. This appliance is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by hand. 5. Turn the external boiler manual gas valve
handle clockwise to close the gas supply (OFF Position). 6. Wait five (5) minutes to clear out any gas. Then smell for gas,
including near the floor. If you smell gas, STOP! Follow “B” in the safety information above on this label. If you don’t smell gas, go to the next step. 7. Turn the external boiler manual gas valve handle counterclockwise to open the gas supply (ON Position). 8. Turn on all electric power to the appliance. 9. Set the thermostat to the desired setting. 10. If the appliance will not operate, follow the instructions
“To Turn Off Gas To Appliance” and call your service technician or gas supplier.
OPEN/OUVERT CLOSED/FERME

1. ARRÊTEZ ! Lisez les instructions de sécurité sur la portion supérieure cette étiquette.
2. Réglez le thermostat à la température la plus basse. 3. Coupez l’alimentation électrique de l’appareil. 4. Cet appareil est équipé de l’ dispositif d’allumage qui automobile
allume maticallyle brûleur. Ne tentez pas d’allumer le brûleur manuellement. 5. Tourner la chaudière externe manuelle poignée en clapet à gaz dans le sens des aiguilles d’une montre pour fermer l’offre de gaz (Position OFF). 6. Attendre cinq (5) minutes pour laisser échapper tout le gaz. Reniflez tout autour de l’appareil, y compris près du plancher, pour déceler une odeur de gaz. Si vous seutez une odeur de gaz,
ARRÊTEZ ! Passez à l’étape B des instructions de sécurité sur la portion supérieure de cette étiquette. S’il n’y a pas d’odeur de gaz, passez à l’étape suivante. 7. Tourner la chaudière externe manuelle compteur de poignée
en clapet à gaz ouvrir dans le sens des aiguilles d’une montre le gaz approvisionnement (Position ON). 8. Mettez l’appareil sous tension. 9. Réglez le thermostat à la température désirée. 10. Si l’appareil ne se met pas en marche, suivez les instructions intitulées « Comment couper l’admission de gaz de l’appareil » et appelez un technicien qualifié ou le fournisseur de gaz.

EXTERNAL BOILER MANUAL GAS VALVE

LA CHAUDIÈRE EXTERNE MANUELLE DE CLAPET A` GAZ

TO TURN OFF GAS TO APPLIANCE/ COMMENT COUPER L’ADMISSION DE GAZ DE L’APPAREIL

1. Set the thermostat to lowest setting. 2. Turn off all electric power to the appliance if service is to be
performed. 3. Turn the external boiler manual gas valve handle clockwise
to close gas supply (OFF Position).

1. Réglez le thermostat à la température la plus basse. 2. Coupez l’alimentation électrique de l’appareil s’il faut procéder à l’entretien. 3. Tourner la chaudière externe manuelle poignée en clapet à gaz dans le
sens des aiguilles d’une montre pour fermer l’offre de gaz (Position OFF).

101607-04

Figure 15-9: Lighting and operating instructions

110331-03 – 1/22

51

PHTM II Combi Installation, Operating & Service Instructions
15 Start-Up and Checkout (continued)

Boiler Sequence of Operation

Table 15-10: Boiler Sequence of Operation

Status Screen Display
Priority: Standby Status: Standby
Priority: Standby Status: Pump Purge
Priority: Central Heat Status: Standby
Priority: Central Heat
Status: Prepurge
Priority: Central Heat
Status: Burner Ignition
Priority: Central Heat
Status: Calibration
Priority: Central Heat
Status: Run
Priority: DHW Status: Run
Priority: Standby Status: Post-purge
Priority: Standby Status:
Hold
Priority: Standby Status: Lockout

Description

Burner – Off

Pump(s) – Off

Three Way Valve – DHW

There is no call for heat, boiler is not firing and priority is “standby”. Boiler is ready to respond to a call for heat. Additionally, boiler and pumps remain off when Warm Weather Shut Down is active or “Boiler Switch” (A01) is set to “Off”.

Burner – Off

Pump(s) – Cycle

Three Way Valve – Cycle

Pump Air Elimination (Pump Purge) is entered when power is cycled or when there has been a supply high limit hold. During this state boiler pump and three way valve cycle in sequence for two minutes to help remove air from boiler water piping. This may be
interrupted by pressing ” ! reset” button.

Burner – Off

Pump(s) – Cycle

Three Way Valve – CH

Boiler is not firing. There is a CH demand and supply temperature is greater than setpoint minus “Diff Below”.

Burner – Off

Pump(s) – On

Three Way Valve – CH

When supply temperature drops, burner demand continues with following status shown: Waiting For Limit To Close: blower started, air pressure switch is checked. Prepurge: blower is driven to prepurge speed to empty chamber of flue products.

Burner – On

Pump(s) – On

Three Way Valve – CH

After prepurge is complete following status is shown: Burner Ignition: Spark and fuel valve are energized.

Burner – On

Pump(s) – On

Three Way Valve – CH

After burner is started, a Calibration is initiated due to 1. Power Cycle 2. Periodic requirement Calibration: after blower reaches calibration speed setting, ionization setpoint is calibrated, next blower drives to low fire and fuel valve output is calibrated (runs for 1 minute).

Burner – On

Pump(s) – On

Three Way Valve – CH

After burner ignition (following calibration), the following status is shown: Low Fire Hold: modulation rate held at low fire to allow initial home heating Run (Modulate): Burner rate modulates to match home heat requirements.

Burner – On

Pump(s) – On

Three Way Valve – DHW

If CH demand is active and a DHW demand is received, DHW demand becomes “priority” and modulation rate, setpoint, “Diff Above” and “Diff Below” are based on DHW settings.

Burner – Off

Pump(s) – Off

Three Way Valve – Cycle

If there is no call for heat, fuel valve is closed and blower is driven to post-purge speed to empty combustion chamber of flue products.

Burner – Off

Pump(s) – Off

Three Way Valve – Cycle

Hold status is entered when a delay is needed before allowing burner to fire. See user display door label or section 19 Troubleshooting to determine cause of the Hold.

Burner – Off

Pump(s) – Off

Three Way Valve – Cycle

A lockout status is entered to prevent boiler from running due to a detected problem. See user display door label or section 19 Troubleshooting to determine cause of Lockout. Last 8 Lockouts are recorded in Lockout History.

52

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16 Operation
User Display Overview

PHTM II Combi Installation, Operating & Service Instructions

reset
+ ­

Figure 16-1: Display Icons

Table 16-2: Display descriptions
When not flashing or alternating display temperature is:
120°F · DHW outlet temperature during DHW priority.
· Boiler supply temperature at all other times.
Visible when Central Heat demand is present.
Visible when DHW demand is present. Icon will flash if DHW setpoint is being adjusted.
Visible when burner is firing. Icon adjacent to active priority. Visible when DHW Comfort Mode is active. (Visible after successful calibration.)
Visible when CH setpoint reset is enabled.
Visible when adjust mode is active. Icon will flash if manual mode is enabled. Visible when manual reset lockout is active.

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53

PHTM II Combi Installation, Operating & Service Instructions

16 Operation (continued)

Operating Mode
Basic boiler status is displayed and DHW setpoint may be adjusted.
reset
+ ­

Figure 16-3: Viewing boiler status
Press “” or “” buttons to cycle through Status List. Each item will alternate between status code and its corresponding value.

Table 16-4: Status List

Display StA SP bt rt dt dr Ft

Description Status (see Table 16-5) Active, Operating Setpoint Boiler Supply Temperature Boiler Return Temperature DHW Temperature DHW Flow Rate Flue Temperature

ot Outdoor Air Temperature ht Recirculation (Header)
Temperature Fr Demanded Firing Rate rUn Run Time Hours

CYC Boiler Cycles H## Hold or Warning Condition E## Manual Reset Lockout

• Not available with local user display

The STA (status) display code contains below listed values.

Table 16-5 Managing of Status Numbers

Display

Description (see Section 19 Troubleshooting for explanation)

0

Self Check

1

Standby

2

Waiting For Air Pressure Switch To Close

3

Prepurge

4

Burner Ignition

5

Calibration

6

Low Fire Hold

7

Rate Limit

8

Run (Modulate)

9

Postpurge

10 Pump Air Elimination (2 minutes)

11 Standby Delay

12 Lockout

13 Boiler On/Off Switch (A01)

14

Warm Weather Shutdown*

• Not available with local user display.

reset
+ 120
­

Figure 16-6: Adjusting DHW Setpoint
Press “+” or “-” buttons to immediately change the DHW setpoint. Faucet and DHW Setpoint flash while editing.

54

110331-03 – 1/22

PHTM II Combi Installation, Operating & Service Instructions
16 Operation (continued)
Adjust Mode Menu
Diagnostic information and Quick Menu parameters are available without entering a password. Press and Hold “menu” button for 3 seconds to access Adjust Mode.
reset

Press buttons

to adjust

parameters.

­

Press buttons to view next menu or parameter.

Press and hold for three seconds to access Adjust Mode
Press to exit current menu or cancel current editing session

Press to select menu or parameter to edit.

Figure 16-7: Adjusting Parameters

Press “” or “” buttons to switch between menus A, b, C, and PAS, press “enter” to Select. The following items are available in the A menu. Menu A, Quick Menu

Table 16-8: Quick Menu (with no password entered)

Display

Range

Description

A01

On/Off Boiler On/Off Switch

A02

On/Off DHW Comfort Mode

A03

60 -140°F (16 – 60°C)

DHW Setpoint

A04

60 – 190°F (16 – 88°C)

Central Heat 1 Setpoint

A05

60 -190°F (16 – 88°C)

Central Heat 2 Setpoint

Menu c, Diagnostic Menu

Table 16-9: Diagnostic Menu

Display

Description

C01 Active Detailed Fault Code (see Table 19-6)

Demand Source

1 Standby

2 Central Heat 1

3 Central Heat 2

4 Domestic Hot Water C02
5 Sequencer Control

6 CH Frost Protection

7 DHW Frost Protection

8 Boiler On/Off Switch

A01 Boiler Switch Allows an installer to prevent boiler starts while reviewing boiler settings.

9 Warm Weather Shutdown C03 Fan Speed Demanded (RPM x 100) C04 Fan Speed Feedback (RPM x 100)

A02 DHW Comfort Mode DHW Comfort Mode monitors recirculation sensor and controls a recirculation pump wired to Auxiliary Pump terminals. Comfort mode helps keep water warm to be immediately available at fixtures.
A03 DHW Setpoint Desired temperature of DHW produced by boiler.
A04 Central Heating 1 Setpoint Desired water temperature of Central Heat 1 (CH1).

C05 Three Way Valve Status (0) DHW, (1) CH C06 System Pump On/Off Status C07 Boiler Pump On/Off Status C08 Auxiliary Pump On/Off Status C09 Flame Signal C10 Safety Software Revision C11 Application Software Revision C12 Parameter Revision

A05 Central Heating 2 Setpoint Desired water temperature of Central Heat 2 (CH2).

Boiler Size Status: (1) 136 combi (2) 200 combi

Menu b, Lockout/Hold History Menu

b01 to b08 are Lockout or Hold history records. b01 is

C13

latest entry.

(3) 080 heat only (4) 120 heat only (5) 150 heat only

(6) 180 heat only

110331-03 – 1/22

55

16 Operation (continued)

PHTM II Combi Installation, Operating & Service Instructions

Accessing Password Protected Menus
Password protected parameters are available by entering a password.

reset
+ ­
Figure 16-10: Menu Structure

Press and hold the “menu” for 3 seconds, Press “” or “” buttons until PAS is visible and press “enter”. Press “enter” while PA1 is visible. Press “+” or “-” buttons until desired value is reached (password is 86).
(Press and hold for 5 seconds enables adjustment by increments of 10) Press “enter” to accept value (password only). Pressing “menu” to exit.

Navigating Menus
Entering password in “Adjust Mode” allows access to shaded menus below and additional items in Quick Menu.
“” or “”

Menu Structure

• Only shows when comminicating Zone Panel connected

IMPORTANT
This boiler is equipped with a feature that saves energy by reducing boiler water temperature as heating load decreases. This feature is equipped with an override which is provided primarily to permit the use of an external energy management system that serves the same function. THIS

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