XXX3 TECHNOLOGY 240HX3 Gas On Demand Water Heater

Specifications

• Models: 240HX3, 340HX3, 540HX3
• Low NOx Emissions: 14 ng/J or 20 ppm
• Gas Type: Natural Gas
• Water Heater Type: Gas Tankless Water Heater
• Installation Manual: ANSI Z21.10.3CSA 4.3

Product Information

The On-Demand Water Heater is a gas tankless water heater suitable for potable water heating only. It is designed to provide hot water efficiently and effectively.

Usage Instructions

Safety Guidelines

Follow all safety guidelines provided in the manual to avoid any potential hazards. Installation and service should be performed by qualified professionals only.

Installation

Proper installation is crucial for the safe and efficient operation of the water heater. Ensure all clearances are met according to the guidelines provided in the manual.

Gas Supply and Gas Pipe Sizing

Make sure to correctly size and install the gas supply piping according to the specifications outlined in the manual.

Water Connections

Connect the water heater to the water supply following the instructions provided. Install a pressure relief valve as recommended for safety.

Electrical Connections

For electrical connections, follow the guidelines provided in the manual. Ensure proper installation of any included accessories such as temperature remote controllers.

FAQs

• Q: Can I install the water heater with a recirculation loop?
  • A: No, do not install the water heater with a recirculation loop. It is suitable for potable water heating only.
• Q: What should I do if I have questions during installation?
  • A: If you have any questions, contact the provided customer support number for assistance.

“`

On-Demand Water Heater Installation Manual and Owner’s Guide

ANSI Z21.10.3CSA 4.3

Models
240HX3 340HX3 540HX3

If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage,
WARNING personal injury or death.

Gas Tankless Water HeaterTM
Do not install the water heater with a recirculation loop. Suitable for potable water heating only.

– Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS · 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.
– Installation and service must be performed by a qualified installer, service agency or the gas supplier.

FEATURING · ENDLESS HOT WATER · ON-DEMAND USAGE · COMPACT, SPACE SAVING · ENERGY CONSERVATION · COMPUTERIZED SAFETY · NO PILOT LIGHT · X3TM TECHNOLOGY · Complies with SCAQMD Rule
1146.2 for natural gas Low NOx Emissions of 14 ng/J or 20 ppm.

If you have any questions, please call or write to:
In the United States 500 Tennessee Waltz Parkway Ashland City, TN 37015 Toll Free: 1-877-737-2840

Keep this manual near the water heater for future reference whenever maintenance, adjustment, or service is required.

Installation Manual
Installation Manual
CONGRATULATIONS
Congratulations and thank you for choosing our tankless water heater. Before use, we recommend that you read through this installation manual carefully. Keep this manual for future reference. If you need an additional manual, contact the manufacturer or your local distributor. You may also download a manual from our website. When you call, please tell us the product name and the serial number of your unit written on the rating plate of the water heater.
3 Page

SPECIFICATIONS

Installation Manual Specifications

Model
Natural Gas Input (Operating Range) Propane Input (Operating Range)

BTU/h BTU/h

240HX3 Indoor
(AT-H3J-DVSCM)

240HX3 Outdoor
(AT-H3J-OSSCM)

340HX3 Indoor
(AT-H3S-DVSCM)

340HX3 Outdoor
(AT-H3S-OSSCM)

Min.: 15,000 Max.: 160,000

Min.: 15,000 Max.: 180,000

Min.: 13,000 Max.: 160,000

Min.: 13,000 Max.: 180,000

540HX3 Indoor
(AT-H3-DVSCM)

540HX3 Outdoor
(AT-H3-OSSCM)

Min.: 15,000 Max.: 199,000

Min.: 13,000 Max.: 199,000

Gas Connection

3/4″ NPT

Water Connections
Water Pressure*
Natural gas Inlet Pressure

psi (MPa)
” W.C. (kPa)

3/4″ NPT
15 – 150 (0.1 – 1)
Min. 4.0 (1.00) Max. 10.5 (2.61)

Propane Inlet Pressure
Weight

” W.C. (kPa)
lbs. (kg)

60 (27.4)

60 (27.1)

Min. 8.0 (1.99) Max. 13.0 (3.23)

60 (27.4)

60 (27.1)

62 (27.9)

61 (27.6)

Dimensions

inch

(HxWxD) mm

22.4 x 17.7 x 10.7 570 x 450 x 272

Ignition

Electric Ignition

Supply

VAC/Hz

120/60

Electric Consumption

Operation W/A

72.7 / 0.61

78.2 / 0.65

89.0 / 0.74

Standby W/A

3.1 / 0.03

3.1 / 0.03

4.2 / 0.04

FreezeProtection

W/A

197/1.7

Water heater category**

IV

N/A

IV

N/A

IV

N/A

*40 psi or above is recommended for maximum flow. **Water heater Category — water heaters of other than direct vent type, for outdoor installation, are divided into four categories
based on static pressure produced in the vent and flue loss. Category IV – a water heater that operates with a positive vent static pressure and with a vent gas temperature that may
cause excessive condensate production in the vent. NOTE: · Check the rating plate to ensure that this product matches your specifications. · The manufacturer reserves the right to discontinue, or change at any time, specifications or designs with-
out notice and without incurring obligation.

NOTICE

The 240HX3/340HX3/540HX3 models do not have Easy-Link or Multi-Unit capability.

4 Page

Installation Manual Introduction

INTRODUCTION

· This manual provides information necessary for the installation, operation, and maintenance of the water heater.
· The model description is listed on the rating plate attached to the side panel of the water heater. · Please read all installation instructions completely before installing this product. · If you have any problems or questions regarding this equipment, consult the manufacturer or its
local representative. · This equipment is an on-demand, tankless water heater designed to efficiently supply endless hot
water for your needs when properly sized and installed. · These high efficiency models have a built-in secondary heat exchanger that absorbs latent heat
from the exhaust gas. · The Indoor models are only to be installed indoors. The Outdoor models are only to be installed
outdoors.
· The principle behind tankless water heaters is simple:

Intake port (Indoor only) Exhaust HL (Indoor only) Exhaust thermistor (Indoor only)
Hi limit switch
HX thermistor (540HX3 only)
Bypass valve (540HX3 only)

Exhaust
Secondary heat exchanger
Primary heat exchanger
Drain plug detector

Burner

Flow sensor/ Water control valve Outlet thermistor
X3TM Cartridge

Hot water outlet

Cold water inlet

Igniter Fan motor Computer board
Gas valves Condensate drain port
Gas

Inlet thermistor

*This diagram illustrates tankless water heater design concepts only and does not accurately represent the water heater’s physical description. 1. A hot water tap is turned on. 2. Water flows through the flow sensor, then through the X3TM Scale Prevention Technology cartridge. 3. The computer initiates the fan motor and gas valve to let gas flow through the heater and sends a signal to
the igniter to create an ignition spark. 4. The gas ignites and flames appear within the burner chamber. 5. Water is heated as it flows through the heat exchanger. 6. Using thermistors to measure temperatures throughout the water heater, the computer modulates the gas
and water valves to ensure proper output water temperature and hot water outflows. 7. When the tap is turned off, the unit shuts down.

5 Page

SAFETY GUIDELINES
SAFETY DEFINITION

Installation Manual Safety Guidelines

DANGER

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

Indicates an imminently hazardous situation which, if not avoided, could CAUTION result in minor or moderate injury.

Indicates an imminently hazardous situation which, if not avoided, could result WARNING in death or serious injury.

NOTICE Indicates information considered import-
ant but not hazard related.

GENERAL
1. Follow all local codes, or in the absence of local codes, follow the current edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA.
2. Properly ground the unit in accordance with all local codes or in the absence of local codes, with the National Electrical Codes: ANSI/NFPA 70.
3. Carefully plan where you intend to install the water heater. Please ensure: · Your water heater will have enough combustion air and proper ventilation. · Locate your heater where water leakage will not damage surrounding areas. (Please refer to page 8.)
4. Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC RATING. · If this unit does not match your requirements, do not install and consult with the manufacturer.
5. If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained technician, the gas company, or the manufacturer.

· Water temperatures over 125 °F (52 °C) can cause severe burns instantly or death from scalding. The water temperature is set at 120 °F (50 °C) from the factory to minimize any scalding risk. Before bathing or showering always check the water temperature.
· To reduce the risk of scalding, install Thermostatic Mixing Valves (temperature limiting valves) at each point of use.
· Do not store or use gasoline or other flammables, vapors, or liquids in the vicinity of this appliance.
· Do not reverse the water and/or gas connections as this will damage the gas valves and can cause severe injury or death. Follow the diagram on page 32 when installing your water
WARNING heater. · Should overheating occur or the gas supply fails to shut off, turn off the manual gas control valve to the appliance. · Do not use this appliance if any part has been in contact with or been immersed in water. Immediately call a qualified installer or service agency to replace a flooded water heater. Do not attempt to repair the unit. It must be replaced. · Do not disconnect the electrical supply if the ambient temperature will drop below freezing unless the water has been drained from the water heater. The Freeze Protection System only works if the unit has electrical power. The warranty will not be covered if the heat exchanger is damaged due to freezing. Refer to the sections on the Freeze Protection System on page 48 and on Unit Draining & Power Outage (Freeze protection) on page 50 for more information. · Failure to observe these warnings could result in severe personal injury or death.

6 Page

Installation Manual Installation

INSTALLATION

GENERAL
1. Follow all local codes, or in the absence of local codes, follow the current edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54.
2. All gas water heaters require careful and correct installation to ensure safe and efficient operation. This manual must be followed exactly. Read the “Safety Guidelines” Section.
3. The manifold gas pressure is preset at the factory. It is computer controlled and should not need adjustment.
4. Maintain proper space for servicing. Install the unit so that it can be connected or removed easily. Refer to the “Clearances” Section on page 9 for proper clearances.
5. The water heater must be installed in a location where the proper amount of combustion air will be available to it at all times without obstructions, or the indoor heater must be direct vented. See pages 13 to 29.
6. Install the water heater so it is level (left-to-right & front-to-back) and plumb (vertically). 7. Electrical service to the water heater requires a means of disconnection. This will allow power to the
water heater to be shut off for servicing and safety purposes. 8. Do not install the unit where the exhaust vent is pointing into any opening in a building or where the
noise may disturb your neighbors. Make sure the vent termination meets the required clearance from any doorway or opening to prevent exhaust from entering a building. (Refer to pages 8, 11, 14 and 15.) Check local code requirements prior to installation. 9. Carefully plan the installation location of the heater and vent terminations. Contaminants such as aerosols, lint, and fine powders (including flour) can clog the air intake and reduce the operation of the fan. This, in turn, can cause improper combustion and reduce the life of the water heater. Regularly ensure that the area around the water heater, vent termination, and air intake are free of dust, debris, and other contaminants. In environments with a high level of contaminants (laundry facilities, hair salons, pet salons, chemical plants, commercial kitchens, etc.), direct venting is required. 10. The Indoor models are to be installed indoors only. These units are equipped with a thermistor and hi-limit switch for the exhaust gas, detecting excess temperatures within the flue and enabling the unit to safely stop operations if needed. These components are always monitoring exhaust gas conditions in order to prevent heat damage to ABS, PVC, CPVC, or polypropylene (Plastic) venting if ABS, PVC, CPVC, or polypropylene is used. If the exhaust gas temperature exceeds 140 °F (60 °C), these components will enable the unit to safely stop operations. These components are not installed on the outdoor models since the exhaust vent is built-in.
· If the water heater is used as a direct-vent appliance, the unit requires 3″ or 4″ combustion air supply pipe. The intake pipe must be sealed airtight. Refer to pages 13 to 29 for more detail.
· Terminating the venting through a sidewall is recommended for the direct- vent system. · Running the exhaust vent and the intake pipe parallel is recommended. · Terminating the exhaust and intake on the same wall/surface is recommended. Terminating in the
same pressure zone allows for pressure balancing, which prevents nuisance shutdowns. · Only install the water heater in a heated area where below freezing temperatures cannot occur.
The warranty does not cover damage caused by freezing. · The water heater must be securely mounted to a wall or other suitable structure. · The venting system shall be installed in accordance with the water heater manufacturer’s and
venting system manufacturer’s instructions. 11. The Outdoor models must only be installed outdoors and only in an area with mild, temperate climates.
The Outdoor model shall be wall-mounted or mounted on a stand. Locate the Outdoor model in an open, unroofed area and maintain the following minimum clearances: There is a 3 in (76 mm) clearance from the left and right sides of the unit to combustible and non-combustible surfaces.
7 Page

Installation Manual Installation
· Installation and service must be performed by a qualified installer (for example, a licensed plumber or gas fitter). Otherwise, the warranty will be void.
· The installer (licensed professional) is responsible for the correct installation of the water heater and for compliance with all national, state/provincial, and local codes.
· The manufacturer does not recommend installing the water heater in a pit or location where WARNING gas and water can accumulate.
· Do not attach the gas line to the water heater until after the gas line system pressure test for leaks has been completed. See page 30 for additional information.
· Do not install or locate the vent terminal pointing toward any operating window, door, opening into a building or other area where people gather, where combustion gases could create a nuisance or hazard or cause property damage.
· Do not install the air intake next to any source of airborne debris, such as a clothes dryer, that can cause debris to be trapped inside the combustion chamber, unless the system is directvented.
· Do not install the unit where water, debris, or flammable vapors may get into the flue terminal or the air intake line.
· The manufacturer does not recommend installing the water heater in an attic due to safety issues. If you install the water heater in an attic: – Make sure the unit will have enough combustion air and proper ventilation. Failure to do so could lead to carbon monoxide poisoning or death. – Keep the area around the water heater clean. When dust collects on the flame sensor, the water heater will shut down on an error code. – Place the unit where it will allow easy access for service and maintenance. – A drain pan, or other means of protection against water damage, is recommended to be installed under the water heater in case of leaks. See the NOTICE below.
· The water heater must be securely mounted to a wall or other suitable structure so that it is level (left-to-right & front-to-back) and plumb (vertically).
· Failure to observe these warnings could result in severe personal injury, death, and/or property damage.

NOTICE

· The warranty will not cover damage caused by water quality. – Only potable water can be used with this water heater. Do not introduce pool or spa water, or any chemically treated water into the water heater. – Introduction of water with iron greater than 0.3 mg/L. – Water pH levels must be between 6.5 and 8.5. – Well water must be treated.
· The manufacturer recommends direct venting when the water heater is installed in beauty salons, dry cleaners or any other locations in which such chemicals are present in the air. Some chemicals used in beauty salons or dry cleaners may affect the flame sensor. In such cases, the water heater may not work properly.
· Although the water heater is designed to operate with minimal sound, the manufacturer does not recommend installing the unit on a wall adjacent to a bedroom, or a room that is intended for quiet study or meditation, etc.
· Locate your water heater close to a drain where water leakage will not do damage to surrounding areas. As with any water heating appliance, the potential for leakage at some time in the life of the product does exist. A drain pan, or other means of protection against water damage, is recommended to be installed under the water heater in case of leaks. In addition, you may install an active water leak detector with a shutoff valve which can turn off the water supply in the event of a leak. The manufacturer is not responsible for damage due to water leaks. If you install a drain pan under the unit, ensure that it will not restrict the combustion air flow.
· This water heater is not suitable for combination water (potable) heating, space heating, and/ or recirculation

8 Page

CLEARANCES

Installation Manual Installation

Maintain all clearances around the water heater. Failure to do so could create a fire hazard, potentially leading to death, serious injury, and/or property damage. WARNING

Model Indoor

Top

Bottom Front

Back

Sides

12 in

18 in

4 in*

0.5 in

3 in

(305 mm) (458 mm) (102 mm) (13 mm) (76 mm)

Side Front

Top Back
Side

Outdoor

36 in

18 in

24 in

0.5 in

3 in

(914 mm) (458 mm) (610 mm) (13 mm) (76 mm)

*24 inches (610 mm) recommended for maintenance.

Boom

INCLUDED ACCESSORIES

Check that these items below are included with the water heater.

Installation manual and
owner’s guide

Remote controller kit Outdoor models only (Refer to pp. 10 and 37.)

Bird screen Indoor models only

X3TM cartridge

Pressure relief valve

100209924 (TM-RE42)

Qty: 2 100282480

100314491

Model

Temperature remote controller

Pipe cover

Neutralizer kit

3″ PVC concentric termination

Recess box

X3 Cartridge Anti-Freeze Kit

7. Non-return valve

4″ PVC Adapter (for Non-return valve)

OPTIONAL ITEMS

240HX3 Indoor

240HX3 Outdoor

340HX3 Indoor

340HX3 Outdoor

9 Page

540HX3 Indoor

540HX3 Outdoor

1. Temperature remote controller:
100209924 (TM-RE42) The temperature remote controllers have three functions. It allows the output temperature from the water heater to be adjusted and it also works as a diagnostic tool and it provides a concise error code whenever there is a problem with the unit. See the Troubleshooting Section (pages 53 to 55) for information on possible error codes.

Installation Manual Installation
2. Pipe cover: 100112718 (TH-PC03)
The pipe cover protects the piping and X3TM Technology from environmental factors such as rain, UV rays and improves the appearance of the installation. The pipe cover or recess box is recommended when the water heater is installed outside.

3. Neutralizer kit: 100112159 The neutralizer assembly neutralizes the condensate (acidic water) that forms in the secondary heat exchanger of the water heater. It connects to the condensate drain port of the water heater by using connectors included with the neutralizer kit. (Refer to pages 34 and 35.)

4. 3″ PVC concentric termination: 100112163
Used when terminating direct-vent (sealed combustion) systems, with Indoor models that require a 3 intake and a 3 exhaust. This concentric termination provides the convenience of only having to make one penetration through a sidewall instead of two separate penetrations for the intake and exhaust piping. The termination includes a bird screen, restricting small animals, pests, and foreign objects from entering into the vent system.

5. Recess box:

6. X3TM Cartridge Anti-Freeze Kit: 100325654

It allows for “clean” installations. The water heater

This kit is recommended for outdoor installations to

fits inside the recess box, which hides and protects the protect the X3 Cartridge. The kit includes a 120 volt

whole water heater and plumbing.

heat trace wire and an insulation blanket.

For retrofit applications For new construction

– no flange

applications – with flange

100298009

100306285

7. Non-return valve: 100113130
It is a must-have item for common venting system. It prevents the escape of combustion gas through non-operating appliances. (Refer to pages 28 and 29.)

8. 4″ PVC Adapter: 100113129 This adapter transitions from the Non-return valve outlet to 4″ schedule 40 PVC pipe.
10 Page

WARNING FOR INSTALLATIONS

Installation Manual Installation

FOR YOUR SAFETY, READ BEFORE INSTALLATION:

Do not install the heater where water, debris or flammable vapors may get into the flue terminal. This may cause damage to the heater and void the warranty.

Do not have the vent terminal pointing toward any opening into a building. Do not locate your heater vent terminal, and air intake in a pit or location where gas and water can accumulate.

Prohibited

Prohibited

Ensure that you meet the minimum clearances shown below for a direct vent termination:

Ensure that you meet the minimum clearances shown below for outdoor vent termination:

1 ft min.

1 ft min. 1 ft min.

4 ft min.

4 ft min. 4 ft min.

1 ft above grade and above ancipated snow level
Ancipated snow level

Locate the outdoor water heater so it’s vent terminal meets the following clearances. Locate the vent terminal of an indoor heater to meet the following clearances:
2 ft from an inside corner 2 ft from an outside corner 3 ft below a soffit/overhang

Do not install next to a dryer or any source of airborne debris that can be trapped inside the combustion chamber, unless the system is direct-vented.

Outside corner
2 ft

3 ft 2 ft

Inside corner

11 Page

HIGH-ALTITUDE INSTALLATIONS

Installation Manual Installation

· · WARNING ·

Adjust the appropriate DIP switches according to model and elevation as shown below. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. Failure to observe these warnings could lead to carbon monoxide poisoning or death.

Indoor models
Altitude DIP switches
240HX3/340HX3
540HX3 (Lower bank of DIP switches)

0 to 2,000 ft (0 to 610 m)
(DEFAULT)
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : OFF No. 4 : OFF No. 5 : OFF
ON 1 2 3 4 5 6
OFF
No. 2 : OFF No. 3 : OFF No. 4 : OFF

2,001 to

3,001 to

5,001 to

7,501 to

3,000 ft

5,000 ft

7,500 ft

10,100 ft

(611 to 914 m) (915 to 1,524 m) (1,525 to 2,286 m (2,287 to 3,078 m)

ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : OFF No. 4 : O N No. 5 : OFF

ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : OFF No. 4 : OFF No. 5 : ON

ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : OFF No. 4 : O N No. 5 : O N

ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : O N No. 4 : O N No. 5 : O N

ON 1 2 3 4 5 6
OFF
No. 2 : OFF No. 3 : O N No. 4 : OFF

ON 1 2 3 4 5 6
OFF
No. 2 : OFF No. 3 : OFF No. 4 : O N

ON 1 2 3 4 5 6
OFF
No. 2 : OFF No. 3 : O N No. 4 : O N

ON 1 2 3 4 5 6
OFF
No. 2 : O N No. 3 : O N No. 4 : O N

Outdoor models

Altitude DIP switches

0 to 2,000 ft (0 to 610 m)
(DEFAULT)

2,001 to

4,001 to

4,000 ft

6,000 ft

(611 to 1,219 m) (1,220 to 1,829 m)

240HX3/340HX3

ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : OFF No. 4 : OFF No. 5 : OFF

ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 3 : OFF No. 4 : OFF No. 5 : O N

1 2 3 4 5 6 7 8 9 10 ON
OFF
No. 3 : O N No. 4 : OFF No. 5 : O N

540HX3 (Lower bank of DIP switches)

ON 1 2 3 4 5 6
OFF
No. 2 : OFF No. 3 : OFF No. 4 : OFF

ON 1 2 3 4 5 6
OFF
No. 2 : OFF No. 3 : OFF No. 4 : O N

ON 1 2 3 4 5 6
OFF
No. 2 : O N No. 3 : OFF No. 4 : O N

NOTE: The dark squares indicate the correct DIP switch positions.

240HX3/340HX3

540HX3

Installation altitude
The maximum certified or allowable installed altitude is 10,100 ft (3,078 m) for indoor models and 6,000 ft (1,829 m) for outdoor models.

Bank of DIP switches

12 Page

Lower bank of DIP switches

VENTING INSTRUCTIONS

Installation Manual Installation

WARNING

· Improper venting of this appliance can result in excessive levels of carbon monoxide which can result in severe personal injury or death.
· Improper installation can cause nausea or asphyxiation, severe injury or death from carbon monoxide and flue gases poisoning. Improper installation will void product warranty.
· When installing the vent system, all applicable national and local codes must be followed. If you install thimbles, fire stops or other protective devices and they penetrate any combustible or noncombustible construction, be sure to follow all applicable national and local codes.

The Indoor model must be vented in accordance with “Venting of Equipment” in the current edition of the
National Fuel Gas Code: ANSI Z223.1/NFPA 54 as well as applicable local building codes.
The use of venting materials approved for Category III/IV appliances is required. In addition, PVC (solid core), CPVC, ABS, and polypropylene are approved for use with the indoor models. For details, please refer to the Exhaust Vent (ABS, PVC, CPVC, or Polypropylene Vent) Section on pages 21 to 24.
General rules for venting water heaters: · Place the water heater as close as possible to the vent termination. · The vent collar of the water heater must be fastened directly to an unobstructed vent pipe. · Do not weld the vent pipe to the water heater’s vent collar. · Do not cut or alter the vent collar of the unit. · The vent must be easily removable from the top of the water heater for normal service and inspection of the unit. · The water heater vent must not be connected to any other gas appliance or vent stack except an approved common-venting system. Refer to pages 28 and 29. · Avoid using an oversized vent pipe or using extremely long runs of the pipe unless it is part of an approved common vent system. · Air supply pipe can be made of ABS, PVC (solid core), CPVC (solid core), polypropylene, corrugated stainless steel, or Category lll/IV stainless steel. Regarding exhaust pipe, refer to pages 21 to 27. · Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in nonmetallic venting systems is prohibited. Covering non-metallic vent pipe and fittings with thermal insulation is prohibited. · Sidewall venting is recommended for the Indoor model. Vertical venting (roof termination) is acceptable. · Slope horizontal venting sections 1/4″ upwards for every 12″ (300 mm) toward the termination or according to local and state codes, or in the absence of local or state codes, the current edition of the National Fuel Gas Code, ANSI Z223.1 (NFPA 54) · The manufacturer recommends running the exhaust vent and the intake pipe as parallel as possible. · For rooftop venting, a rain cap or other form of termination that prevents rain water from entering into the water heater must be installed. · Do not terminate vent into a chimney. If the vent must go through the chimney, the vent must run all the way through the chimney with approved vent pipe. · The water heater shall not be connected to a chimney flue serving a separate appliance, designed to burn solid fuel. · When an existing Category I appliance is removed or replaced, the original venting system may no longer be sized to properly vent the attached water heater. An improperly sized venting system may cause formation of condensate, leakage, and spillage and so on. Follow all instructions in this manual.
General rules for vent terminations: · Avoid locating the water heater vent termination near any air intake devices. These fans can pick up the exhaust flue products from the water heater and return them to the building. This can create a health hazard. · Locate the vent termination so that it cannot be blocked by any debris, at any time. Most codes require that the termination be at least 12 in (305 mm) above grade and anticipated snow level, but the installer may determine if it should be higher depending on the job site condition and applicable codes. · A proper sidewall termination is recommended when the water heater is vented through a sidewall. · Regarding the clearances from the exhaust termination to the air inlet or opening, refer to pages 14 to 16.

13 Page

D E

-Vent termination clearances-

Installation Manual Installation

Inside corner detail
G
V
A

Legend: V = Vent terminal X = Air supply inlet = Area where terminal is not permied
H

LB

C

V

Fixed closed

Operable

FV

B

B

B Fixed

V

V Operable closed

B

X

V

B A

J

I

15

M

X

V

K

Regulator vent outlet In the event no regulator is present, H and I can be disregarded

US Installations1

Direct vent

Other than direct vent

A Clearance above grade, veranda, porch, deck, or balcony

1 ft (30 cm)

1 ft (30 cm)

B Clearance to window or door that may be opened

1 ft (30 cm)

4 ft (1.2 m) below or to side of opening;
1 ft (30 cm) above opening

C Clearance to permanently closed window

0

0

Vertical clearance to ventilated soffit located above D the terminal within a horizontal distance of 2 ft (61
cm) from the center line of the terminal

3 ft (91 cm)

3 ft (91 cm)

E Clearance to unventilated soffit

F Clearance to outside corner

G Clearance to inside corner

H

Clearance to each side of center line extended above meter/regulator assembly

3 ft (91 cm) 2 ft (61 cm) 2 ft (61 cm)

3 ft (91 cm) 2 ft (61 cm) 2 ft (61 cm)

I Clearance to service regulator vent outlet

Clearance to non-mechanical air supply inlet to J a building or the combustion air inlet to any other
appliance.

K Clearance to mechanical air supply inlet

L

Clearance above paved sidewalk or paved driveway located on public property

1 ft (30 cm)
3 ft (91 cm) above if within 10 ft (3 m) horizontally.
7 ft (213 cm)

4 ft (1.2 m) below or to side of opening;
1 ft (30 cm) above opening 3 ft (91 cm) above if within
10 ft (3 m) horizontally.
7 ft (213 cm)

M Clearance under veranda, porch deck, or balcony

1 ft (30 cm)**

1 ft (30 cm)**

*Clearance in accordance with local installation codes and the requirements of the gas supplier. **Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

The vent for condensing water heaters shall not terminate:

· over public walkways; or

· near soffit vents or crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or cause property damage; or

· where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other

equipment.

Notes:

1. In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code

2. If locally adopted installation codes specify clearances different than those illustrated, then the most stringent clearance shall prevail.

3. Blocking air supply and exhaust vent by snow may cause incomplete combustion and an appliance failure. Install the termination by

providing sufficient clearance from anticipated snow line in accordance with local code or manufacture’s instructions and make sure

there in no blockage.

4. Provide an appropriate clearance between a vent termination and a building to prevent degradation to building materials caused by

flue gases.

5. Water heaters installed outdoors follow the Other Than Direct Vent clearances.

14 Page

Installation Manual Installation
-Clearances for sidewall terminations-

Improper installation can result in carbon monoxide poisoning or death. Follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the clearances below can be used as guidelines. Local codes supersede these guidelines. WARNING

(30m15ifmnt.m) (61m02imfnt.m)

TerEmxAhinnaauttisictoinpat(e30dm51Simfntn.mo)w

level cInosrindeer

Multiple Sidewall Terminations An exhaust termination must be at least 1 ft (305 mm) away from another exhaust termination. An exhaust termination must also be at least 2 ft (610 mm) away from an inside corner. (If the adjacent wall is less than 2 ft (610 mm) of length, the minimum required distance away from the inside corner will be equal to the length of that adjacent wall.)

2 ft (610 mm) min.

Exhaust termination

Combined intake and exhaust termination

2 ft

1 ft (305 mm)

(610 mm) min.

min.

1 ft

(305 mm)

min. Anticipated Snow

level Inside

corner

Multiple DV Sidewall Terminations
A direct vent (DV) termination must be at least 1 ft (305 mm) away from other direct vent terminations. A direct vent termination must also be at least 2 ft (610 mm) away from an inside corner. (If the adjacent wall is less than 2 ft (610 mm) of length, the minimum required distance away from the inside corner will be equal to the length of that adjacent wall.)

<Case 1> Exhaust

For direct vent sidewall

Intake

terminations that use two

separate penetrations for the

intake and exhaust, keep the

termination clearances shown in 1 ft (305 mm)

the diagrams on the right.

min.

X3TM CARTRIDGE is not shown.

Exhaust Intake
0.5 ft (159 mm) min.

Exhaust and/or direct vent sidewall terminations should be at least 2 ft (610 mm) away from an opposite surface/wall. Do not place the termination directly in front of an opening into a building.

<Case 2> Exhaust
1 ft (305 mm) min. Intake

Exhaust Intake
0.5 ft (159 mm) min.

15 Page

-Clearances for rooftop terminations-

Installation Manual Installation

WARNING

Follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the clearances below must be met. Local codes supersede these clearances. Failure to observe this warning may result in severe personal injury or death.

Angled roof termination

2 ft (610 mm) min.
Exhaust

1 ft (305 mm)
min.

Intake

1 ft (305 mm)
min.

1 ft (305 mm)
min.

Anticipated snow level

Flat roof termination

Intake

3 ft (914 mm) min.

Exhaust

1 ft (305 mm)
min.

1 ft (305 mm)
min.

Anticipated snow level

Multiple angled roof terminations

Multiple flat roof terminations

1 ft (305 mm)
min.
1 ft (305 mm)
min.

Exhaust

1 ft (305 mm)

Exhaust

min.

3 ft (914 mm)
min.

Intake

1 ft (305 mm)
min.

Intake
1 ft (305 mm)
min.

2 ft (610 mm)
min.

2 ft

(610 mm)

min.

Exhaust

Exhaust

1 ft (305 mm)
min.

1 ft (305 mm)
min.

3 ft (914 mm)
min.

Anticipated snow level

Ancipated snow level

Intake

Intake

WARNING

· Exhaust terminations must be at least 1 ft (305 mm) away from any obstructions. · Minimum spacing between multiple terminals:
intake terminals: 1 ft (305 mm) spacing between each exhaust terminals: 1 ft (305 mm) spacing between each · The exhaust termination must be a horizontal distance of at least 2 ft (610 mm) from a wall or surface unless specified differently by local code. · Failure to observe this warning may result in severe personal injury or death.

16 Page

-Combustion air supply-

Installation Manual Installation

WARNING

This gas water heater requires an adequate source of clean air for combustion and ventilation. Without sufficient air, your water heater may not operate properly and may emit excessive and abnormal amounts of carbon monoxide which may result in carbon monoxide poisoning or death.

NOTICE

The guidelines in this section apply to installations within the United States. All U.S. installations must conform to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (current edition) and local codes.

Before installing the water heater, you must determine the amount of air needed to supply this water heater and any other gas appliances in the same area and provide adequate air for combuson and venlaon. Consult a qualified person if you’re unsure of the proper way to supply air to your water heater.
Check for Chemicals: Air for combuson and venlaon must be clean and free of corrosive chemicals. If corrosive chemicals, such as sulfur, fluorine, or chlorine are present, the water heater must be direct vented. Failure due to these corrosive chemicals is not covered by the warranty.
WARNING! In all cases, ensure that corrosive chemicals are not present at the air intake. Presence of such chemicals at the air intake could result in death, personal injury, or property damage. Examples of locaons that require outside air due to chemicals include:
· Beauty salons
· Photo processing labs
· Indoor pools · Laundry, hobby, or craft rooms · Chemical storage areas
· Restaurants
Products such as aerosol sprays, detergents, bleaches, cleaning solvents, gasoline, air fresheners, paint and varnish removers, and refrigerants should not be stored or used near the water heater.
Does your installation space have sufficient combustion air?
Venlaon with outside air is recommended for all installaons. Even if the water heater is installed in a large, open room inside the house, outdoor air is usually needed because modern homes are very ghtly sealed and often do not supply enough air to the water heater. However, when installed in a large indoor space, it may be possible to provide enough air without outside venlaon. If you are unsure if your installaon locaon has enough venlaon, contact your local gas ulity company or code officials for a safety inspecon or direct vent the water heater The following instrucons will help determine if it may be possible to install the water heater without outside venlaon.
Calculate total BTU/h rating of all appliances. To calculate the combuson air and venlaon required, add up the total BTU/h rangs of all gas burning appliances (e.g., water heaters, furnaces, clothes dryers) in the same area. Do not include appliances that are direct vented. Refer to the following example.

17 Page

Installation Manual Installation
Your water heater’s BTU/h rating is on the rating plate. The BTU/h ratings should be on the other appliances’ rating plates. If you have trouble determining the BTU/h ratings, contact the manufacturer or have a qualified person determine the ventilation requirements.
NOTICE: If you are replacing your old water heater with one that has a higher BTU/h rang, the amount of venlaon required may be greater.

Example:

Gas Burning Appliance
Gas Water Heater Furnace Dryer

BTU/h Rating
199,000 75,000 20,000

Your appliances:

Gas Burning Appliance Gas Water Heater

BTU/h Rating

Total

294,000

Total

Calculate the air volume of the room Air requirements depend on the size of the room.
Room Volume (ft3) = Floor Area (ft2) X Ceiling Height (ft) If there are large objects in the room (e.g., refrigerator, furnace, car), subtract their volume from the volume of the room to get a beer esmate of the air available.
Air Volume = Room Volume – Object Volume
NOTE: Adjoining rooms with permanently opened doorways can be counted as part of the calculaon.
Calculate required air volume
A water heater installed in an unconfined attic, garage, or space requires that the space be at least 50 ft3 (1.42 m3) per 1,000 BTU/h of the total input for all gas burning appliances in the same area.
Required Air Volume (ft3) =Total Appliance Energy Rang (btu/h) X 50 ft3 / 1000 (btu/h) Example:
(294,000 / 1000) x 50 = 14,700 ft3
If the air volume of the room is less than the required air volume, you must direct vent the water heater or provide permanent outside air openings that draw in sufficient air. Go to “Install with outside venlaon” if you want to provide combuson air with outside venlaon.
If the air volume of the room is greater than the required air volume, it may be possible to install the water heater without outside venlaon. However, be sure to consider the effects of exhaust fans. Exhaust fans can affect the amount of combuson air that is available in your home. Appliances such as furnaces, whole house fans, and clothes dryers draw air out of your home. If they draw air out faster than it can be replaced, your water heater may not have enough oxygen to fire properly. Back-drafting may also result, which is when negave air pressure pulls air backwards through chimneys or appliance vents. These events can cause unsasfactory water heater performance. The best soluon is to direct vent the water heater or install an adequate number of make-up air vents. (See “Install with outside venlaon”.) For more informaon, consult a qualified technician or your local gas ulity. Install with outside ventilation
Venlaon with outside air is recommended, and, for most installaons, is needed. There may be exisng venlaon that is adequate, or you may need to add more venlaon.
Supplying outside air to the water heater typically requires two openings. One opening must be within 12 in (305 mm) from the floor and the second opening must be within 12 in (305 mm) from the ceiling. Although a single opening is not preferred, you may use a single opening to outside air if the minimum free area is sized according to Table 1. Two openings must be used when venlang with air from another room. The outside air can be taken from a crawl space or attic open to the outdoors and adequately venlated. You may use vercal or horizontal ducts.
18 Page

Installation Manual Installation
Determine type of ventilation
There are several types of venlaon that can be used. The various opons are listed below. See also the illustraons on the next page.
1. Direct to outdoors
2. Vercal ducts 3. Horizontal ducts-Single opening (not recommended; must be at least 100 in2 (645 cm2) . Not appropriate for con-
fined spaces smaller than 50 ft3 (1.42 m3) per 1,000 BTU/h or when getting air from another room.) 4. From a larger room inside the house (not recommended ­ refer to “Calculate the air volume of the room” above to
determine if the combined volume of the rooms may be adequate).
Determine minimum free area required for each vent opening
The size of the vent openings depends on the total BTU/h rang of all appliances in the space (use your calculaon from “Before beginning”) and the type of vent used. Table 1 provides the minimum free area for each vent opening depending on the type of venlaon.
Calculate minimum size of vent openings and ducts
The vent cross-seconal area needed to provide the free area depends on the covering on the vent openings. Typical vents use louvers or grilles to protect the opening. The louver or grill itself blocks some of the free area, so the opening may need to be larger to meet the minimum free area requirements. Use the following formula to calculate the required cross-seconal area:
Cross-seconal area = minimum free area required ÷ percent free area of covering (in decimals ­ e.g., 60 % = 0.6) For example, an installaon area that requires openings with 100 in2 (645 cm2) of free area would need 134 in2 (865 cm2) openings if using metal louvers rated at 75% free area (100 in2 ÷ 0.75 = 134 in2). If you do not know the % free area for your louver or grill, use the following values:
· For wood louvers or grilles: 25% · For metal louvers or grilles: 75% Follow these rules to ensure that vents and ducts provide adequate air flow: · Each vent opening must be no smaller than 100 in2 (645 cm2). · Ducts must have the same cross-seconal area as free area of the opening. · Rectangular ducts must have a minimum dimension of no less than 3 in (76 mm). · All screens must have mesh ¼” or larger. · Moveable louvers must be locked open or interconnected with the equipment so that they open automacally during
operaon. · Keep louvers and grills clean and free of debris or other obstrucons.
Check that air source is clean and free of chemicals
Air for combuson and venlaon must be clean and free of corrosive or flammable chemicals. A failure due to corrosive chemicals in the air is not covered by the warranty. Combuson air must be free of acid-forming chemicals such as sulfur, fluorine, and chlorine. Be sure that air at the vent inlets is free of such chemicals.

Table 1

Minimum Free Area of Permanent Openings for Venlaon and Combuson Air Supply ­ Air from outdoor or

indoor spaces.

Based on the total BTU/h input rang for all gas burning appliances within a confined space.

Opening Source

Minimum Free Area

Direct to outdoors*

1 in2 (6.5 cm2) per 4,000 BTU/hr (see Figure 1, 2)

Vercal ducts Horizontal ducts

1 in2 (6.5 cm2) per 4,000 BTU/hr (see Figure 3) 1 in2 (6.5 cm2) per 2,000 BTU/hr (see Figure 4)

Single Opening

1 in2 (6.5 cm2) per 3,000 BTU/hr (see Figure 5)

Two permanent openings to another room**

1 in2 (6.5 cm2) per 1,000 Btu/hr (see Figure 6) Opening: 100 in2 (645 cm2) MIn

Minimum dimension of air openings:

no less than 3 in (76 mm)

*These openings connect directly with the outdoors through a venlated attic, a venlated crawl space, or through

an outside wall.

**For direcon on combining spaces in different stories within the structure, refer to the current edion of the Na-

onal Fuel Gas Code ANSI Z223.1/NFPA 54.

See graphics on next page.

19 Page

Combustion air supply options
X3TM CARTRIDGE NOT SHOWN FOR CLARITY.

Confined Space

Gable vent to outdoors
Install above insulation
Outlet air to attic 1 in2 (6.5 cm2) per 4,000 btu/h

Alternate Air Inlet

Inlet air from the crawl space

1 in2 (6.5 cm2) per 4,000 btu/h

Open foundation vent

Figure 1 – Direct to outdoors openings

Confined Space

Gable vent to outdoors Install above insulation

12″ (305 mm) maximum

Outlet air to attic 1 in2(6.5 cm2) per 4,000 btu/h Inlet air duct 1 in2 (6.5 cm2) per 4,000 btu/h

Figure 3 – Vercal duct openings

Installation Manual Installation

12″ (305 mm) maximum

Two permanent Openings
1 in2 (6.5 cm2) per 4,000 btu/h

Confined Space 12″ (305 mm) maximum

Figure 2 – Direct to outdoors openings Two permanent openings

Confined Space

1 in2 (6.5 cm2) per 2,000 btu/h
Outlet Outdoor Air Ducts
Inlet

1 in2 (6.5 cm2) per 2,000 btu/h
Figure 4 – Horizontal duct openings

CSpoancfiened

Alternative Opening Location
1 in2 (6.5 cm2) per 3,000 btu/h

12″ (305 mm) maximum
Confined Space

Two permanent Openings

1 in2 (6.5 cm2) per 1,000 btu/h

12″ (305 mm) maximum

Figure 5 – Single opening

20 Page

Figure 6 – Two permanent openings

Installation Manual Installation

-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The indoor models can be vented with schedule 40 PVC (temperature rated up to 149 °F), CPVC, ABS, or polypropylene.

Item

Material

United States

Schedule 40 PVC

ANSI/ASTM D1785

Exhaust pipe and Fittings

PVC-DWV Schedule 40 CPVC Schedule 40 ABS-DWV

ANSI/ASTM D2665 ANSI/ASTM F441 ANSI/ASTM D2661

Polypropylene

UL-1738

PVC

ANSI/ASTM D2564

Pipe Cement/Primer

CPVC

ANSI/ASTM F493

ABS

ANSI/ASTM D2235

Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in non-metallic venting systems is prohibited. Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.

· The maximum length of exhaust vent piping must not exceed 70 ft (21.3 m) for 3 venting, which depends on the elevation where the water heater is installed, and 100 ft (30.5 m) for 4 venting (deducting 5 ft (1.5 m) for each elbow used in the venting system). Do not use more than 5 elbows. See the table below.
· When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft (0.9 m) intervals with overhead hangers.

Diameter 3 in 4 in

Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length*

5

70 ft (21.3 m)

5

100 ft (30.5 m)

*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.

No. of Elbows*
0

0 to 3,000 ft (0 to 914 m)
70 ft (21.3 m)

Vertical or Horizontal (Total) Vent Length

3″ venting

3,001 to 6,000 ft (915 to 1,829 m)

6,001 to 10,100 ft (1,830 to 3,078 m)

40 ft (12.2 m)

25 ft (7.6 m)

1

65 ft (19.8 m)

2

60 ft (18.3 m)

35 ft (10.7 m) 30 ft (9.1 m)

20 ft (6.1 m) 15 ft (4.6 m)

3

55 ft (16.8 m)

25 ft (7.6 m)

10 ft (3.0 m)

4

50 ft (15.2 m)

20 ft (6.1 m)

N/A

5

45 ft (13.7 m)

N/A

N/A

Excludes vent terminators, one termination elbow, or rain caps. For details on the vent connection, refer to pages 22 to 24. *For each elbow added, deduct 5 ft (1.5 m) from max. vent length.

21 Page

4″ venting 0 to 10,100 ft (0 to 3,078 m) 100 ft (30.5 m)
95 ft (29.0 m)
90 ft (27.4 m)
85 ft (25.9 m)
80 ft (24.4 m)
75 ft (22.9 m)

Installation Manual Installation
-DIP switch settings for vent length-
Typical installations using PVC, CPVC, ABS, or polypropylene vent

·
· WARNING ·

Adjust the appropriate DIP switches according to model and vent length as shown below. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. Failure to observe these warnings could lead to carbon monoxide poisoning or death.

3 inch & 4 inch vent installation
X3TM CARTRIDGE NOT SHOWN.

Two-pipe, direct-vent installation

Horizontal Installation
Wall
Hanger

Vertical Installation
Roof

Hanger

Roof flashing

Fire stop

Connect between exhaust vent collar and piping. See the instrucons on the next page.
For details on the vent components, refer to the vent manufacturer’s instructions.

Single-pipe with room-air intake installation

Horizontal Installation

Vertical Installation

Hanger Wall

Roof
Roof flashing

Elbow

Elbow
Fire stop Connect between exhaust vent collar and piping. See the instrucons on the next page.
For details on the vent components, refer to the vent manufacturer’s instructions.

22 Page

Installation Manual Installation

·
· WARNING ·

Adjust the appropriate DIP switches according to model and vent length as shown in the following. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. Failure to observe these warnings could lead to carbon monoxide poisoning or death.

240HX3/340HX3

540HX3

Upper bank of DIP switches

Bank of DIP switches

Lower bank of DIP switches

Set DIP switches shown in the table below depending on the vent diameter, the installation, and the vent length.

Vent diameter & Installation

3 venting* 4 venting

Two-pipe, Direct vent
Single vent Two-pipe, Direct vent &
Single vent

240HX3/340HX3 Indoor

5 to 20 ft (1.5 to 6.1 m) (DEFAULT)
5 to 45 ft (1.5 to 13.7 m) (DEFAULT)
5 to 50 ft (1.5 to 15.2 m) (DEFAULT)
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : O N No. 7 : OFF

Vent length
21 to 40 ft (6.2 to 12.2 m) 46 to 70 ft (13.8 to 21.3 m)
51 to 100 ft (15.3 to 30.5 m)
ON 1 2 3 4 5 6 7 8 9 10 OFF
No. 6 : OFF No. 7 : OFF

41 to 70 ft (12.3 to 21.3 m)
ON 1 2 3 4 5 6 7 8 9 10 OFF
No. 6 : O N No. 7 : O N

540HX3 Indoor (Upper bank of DIP switches)

ON 1 2 3 4 5 6 7 8
OFF
No. 3 : O N No. 4 : OFF

ON 1 2 3 4 5 6 7 8
OFF
No. 3 : OFF No. 4 : OFF

ON 1 2 3 4 5 6 7 8
OFF
No. 3 : O N No. 4 : O N

*PVC concentric termination (100112163) installation is applied to the DIP switch settings of 3″ venting. (Refer to page 10.)

3″ vent connection for PVC/CPVC venting only

3″ straight pipe
Intake vent collar with 3″ adapter (Female)

3″ straight pipe
Exhaust vent collar with 3″ adapter (Female)

· PVC adapter will accept 3″ straight pipe.

3″ street elbow with bird screen

3″ straight pipe

Intake vent collar with 3″ adapter (Female)

Exhaust vent collar with 3″ adapter (Female)

1. Connect spigot end of 3″ street elbow into the intake vent collar with 3″ adapter. Be sure to insert bird screen into the hub side.
2. Connect 3″ straight pipe into the exhaust vent collar with 3″ adapter.

23 Page

4″ vent connection for PVC/CPVC venting only

Installation Manual Installation

4″straight pipe

4″ straight pipe

3″ x 4″ increaser
3″straight pipe no more than 12″ (305 mm)
Intake vent collar with 3″ adapter (Female)

3″ x 4″ increaser
3″ straight pipe no more than 12″ (305 mm)
Exhaust vent collar with 3″ adapter (Female)

1. Insert no more than 12″ (305 mm) of 3″ straight pipe into the exhaust/intake vent collar with 3″ adapter.
2. Connect 3″ x 4″ increasers to straight pipes. 3. Connect 4″ straight pipes to the increasers.

4″ straight pipe

3″ x 4″ increaser

3″ street elbow with bird screen

3″ straight pipe no more than 12″ (305 mm)

Intake vent collar with 3″ adapter (Female)

Exhaust vent collar with 3″ adapter (Female)

1. Insert no more than 12″ (305 mm) of 3″ straight

pipe into the exhaust vent collar with 3″ adapter.

2. Connect a 3″ x 4″ increaser into the 3″ straight

pipe.

3. Connect 4″ straight pipe into the increaser.

4. Connect spigot end of 3″ street elbow into the

intake vent collar with 3″ adapter. Be sure to

insert bird screen into the hub side.

<How to remove 3″ PVC adapter from the intake/exhaust collar>

*Remove the 3″ adapter when using vent material other than PVC or CPVC.

3″ adapter*
Intake vent collar (Female)
Screws

3″ adapter*
Exhaust vent collar (Female)

1. Remove each screw from 3″ adapter to detach the adapters from each vent collar.

POLYPROPYLENE VENTING
WARNING! Do not mix parts or fittings of different material types, and do not mix pipe, fittings, or joining methods from different manufacturers. Combustion exhaust can contain carbon monoxide and must be properly vented outside. Breathing abnormal amounts of carbon monoxide can result in serious injury or death.

Centrotherm Innoflue polypropylene venting is approved for use with these water heaters. Follow the instructions in this manual and in the vent manufacturer’s instructions when installing vent pipe.

Description
4”/6” x 39″ (990 mm) Concentric Wall 101 mm to 3″ Adapter

Centrotherm Part No. (Trade Name
InnoFlue)
ICWS4639
ISA010103

Description
3”/5” x 13” (330 mm) Concentric Wall Termination SS
3″ Twin Pipe to 3″/5″ Concentric Adapter

Centrotherm Part No. (Trade Name
InnoFlue)
ICWS3513
ICTC0335

101 mm to 4″ Adapter

ISA010104

24 Page

Installation Manual Installation
-Exhaust vent (Stainless steel vent)-
This is a Category IV appliance and must be vented accordingly. The vent system must be sealed airtight. All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed aluminum adhesive tape having a minimum temperature rating of 160 °F (71 °C). For best results, a vent system should be as short and straight as possible.
· The Indoor models are a Category IV appliance and must be vented accordingly with any 4 vent approved for use with Category III/IV or Special BH type gas vent.
· The manufacturer recommends the NovaVent® or Z-Vent® venting manufactured by Z-Flex® U.S. and are listed to UL 1738.
· Follow the vent pipe manufacturer’s instructions when installing the vent pipe. · The maximum length of exhaust vent piping must not exceed 100 ft (30.5 m) (deducting 5 ft (1.5 m) for
each elbow used in the venting system). Do not use more than 5 elbows. · When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft (0.9 m) intervals with over-
head hangers.

Diameter Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length*

4 in

5

100 ft (30.5 m )

*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.

No. of Elbows Max. Vertical or Horizontal Vent Length No. of Elbows Max. Vertical or Horizontal Vent Length

0

100 ft (30.5 m)

3

85 ft (25.9 m)

1

95 ft (29.0 m)

4

80 ft (24.4 m)

2

90 ft (27.4 m)

5

75 ft (22.9 m)

Excludes vent terminators, termination elbows, or rain caps.

-DIP switch settings for vent length-
Typical installations using stainless steel vents

·
· WARNING ·

Adjust the appropriate DIP switches according to model and vent length as shown below. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. Failure to observe these warnings could lead to carbon monoxide poisoning or death.

Horizontal Installation
Wall Hanger

Vertical Installation
Rain cap Roof

Hanger

Roof flashing

Fire stop
Sidewall vent terminaon
For details of the optional items, refer to the Installation manual for each optional item. X3TM CARTRIDGE NOT SHOWN.
25 Page

Installation Manual Installation

DIP switch settings : Single pipe and Direct vent installations / Vent diameter : 4″ venting

240HX3/340HX3 Indoor

540HX3 Indoor (Upper bank of DIP switches)

5 to 50 ft (1.5 to 15.2 m) (DEFAULT)
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : O N No. 7 : OFF

Vent length 51 to 100 ft (15.3 to 30.5 m) 5 to 50 ft (1.5 to 15.2 m)
(DEFAULT)

ON 1 2 3 4 5 6 7 8 9 10

ON 1 2 3 4 5 6 7 8

OFF

OFF

No. 6 : OFF No. 7 : OFF

No. 3 : O N No. 4 : OFF

51 to 100 ft (15.3 to 30.5 m)
ON 1 2 3 4 5 6 7 8 OFF
No. 3 : OFF No. 4 : OFF

<How to remove 3″ PVC adapter from the intake/exhaust collar>

*Remove the 3″ adapter when using metal vent.

3″ adapter*

3″ adapter*

Intake vent collar

(Female)

Screw

4″ vent connection for direct-vent installation

Exhaust vent collar (Female)

4″ stainless steel vent straight pipe or appliance adapter
Intake vent collar (Female)

4″ stainless steel vent straight pipe or appliance adapter
Exhaust vent collar of the Indoor models (Female)

· Connect 4″ stainless steel vent straight pipes or appliance adapters to the exhaust/intake vent collar.

4″ vent connection for single vent installation

4″ elbow with bird screen
Intake vent collar (Female)

4″ stainless steel vent straight pipe or appliance adapter
Exhaust vent collar of the Indoor models (Female)

1. Connect a 4″ stainless steel vent pipe or appliance adapter to the exhaust vent collar.
2. Connect a 4″ elbow to the intake vent collar.

· Follow the clearances listed on pages 14-16 when installing the vent and air intake terminations.
· Follow the vent manufacturer’s installation instructions and clearance requirements. WARNING · Use 4″ Category III/IV approved or Special BH, single or double wall stainless steel vent pipe.
· Do not mix parts or fittings of different material types, and do not mix pipe, fittings, or joining methods from different manufacturers. Combustion exhaust can contain carbon monoxide and must be properly vented outside. Breathing abnormal amounts of carbon monoxide can result in serious injury or death.

26 Page

Installation Manual Installation

Approved Category IV, Single Wall, Venting Suppliers and Part Numbers

Description

Heater Vent Kits

Z-FLEX®

Nova VENT®

Z-VENT®

4″ Adjustable straight pipe – 10″-18″ (254 – 457 mm) adjustability

100112405 2NVAL4

2SVSPA04

4″ Sidewall termination (4″ Termination Hood)

100112419 2NVTH4

2SVSHTX04

4″ Vent termination tee

100112547 2NVTT4

2SVSTTF04

4″ Rain Cap

100112415 2NVRC4

2SVSRCF04

4″ Extreme weather rain cap
4″ 3-in-1 adapter (F-F adapter, condensate drain, & back-flow preventer)
4″ F-F adapter

100112548 2NVWC4 2SVSHRC04 100112549 2NVBFA4 2SVBFDPA04 100112399 2NVAFF4 2SVEEWCF0445

4″ Backflow preventer w/ F-F adapter

100112416 2NVBFU4

4″ exhaust/3″ intake DV concentric termination – 5″-10″ (127 – 254 mm) adjustability
4″ exhaust/3″ intake DV concentric termination – 12″-18″ (305 – 457 mm) adjustability

100112550 100112551

2NVHTC43S 2NVHTC43

4″ Sidewall termination, adjustable pipe

100187853 2NVBV4

4″ exhaust/3″ intake concentric termination – 5″ to 10″ (127 – 254 mm) adjustability
4″ exhaust/3″ intake concentric termination – 12″ to 18″ (305 – 457 mm) adjustability
4″ exhaust / 4″ intake concentric termination – 5″ to 10″ (127 – 254 mm) adjustability
4″ exhaust/4″ intake concentric termination – 12″ to 18″ (305 – 457 mm) adjustability

100112550 2NVHTC43S 100112551 2NVHTC43 100112552 2NVHTC44S 100112553 2NVHTC44S

2ZVB04 2SVSHTC43S 2SVSHTC43
n/a 2SVSHTC43S 2SVSHTC43 2SVSHTC04S 2SVSHTC04

NOTICE

Refer to heater manufacturer literature/website and the vent manufacturer for available components.

27 Page

Installation Manual Installation
-Common-venting system-
The Indoor model can be vented together using the same exhaust and intake venting. · The 240HX3/340HX3/540HX3 models do not have Easy-Link or Multi-Unit capability. · Up to 8 water heaters can be common-vented together. · A non- return valve (100113130) must be used for each water heater that is part of the system. · The water heaters must all be direct-vented. · The common- venting system shall be in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (Current Editions), local codes, and the venting manufacturer’s instructions. · For common-venting pieces and components, the manufacturer recommends Centrotherm’s vent line.
Allowable Indoor models for common-venting
240HX3, 340HX3, 540HX3, 240H, 340H, 540H, 540P, CT-199

Only the models listed in the table above can be common-vented together. Other models cannot be common-vented. WARNING Failure to observe these warnings could lead to carbon monoxide poisoning or death.

Typical common-vent installation examples

Roof

Exhaust

Roof

Condensate drain port

Intake wall

Condensate drain port

Exhaust

Intake

Roof

Non-Return Valve
Exhaust

Non-Return Valve

wall

Condensate drain port
Non-Return Valve

Intake

NOTICE

For details on the installation of a common-vent system, please refer to “Common Venting Tankless Gas Water Heaters.” It is a manual which is available on the water heater manufacturer’s website.

X3TM CARTRIDGE NOT SHOWN. wall
28 Page

Installation Manual Installation

To determine the dimension of a common-venting system

Determine the vent diameter (D) and the total vent length based on the number of water heaters installed. The total vent length (L) consists of the horizontal width (W) and the vercal height (H). See the table below.

· Total vent length (L)=”H”+”W”+
(Number of Elbows X 5)
· Vent diameter=”D”

NOTICE

· Regarding the clearances
between the exhaust terminaon and the intake terminaon, refer to pages 14 to 16.
· Insert bird screen in elbow
terminations.

Elbow terminal Exhaust

Elbow terminal

“H”

Intake

“D” “W”

X3TM CARTRIDGE NOT SHOWN.

Non-Return Valve

WARNING

· A Non-Return Valve must be installed for each water heater. This prevents the escape of combustion gas through non-operating appliances.
· For detailed instructions on the common-venting system, refer to the instructions that are packaged with the vent parts or web site.

Common-venting system

Vent Diameter*
(D)
4 in

Max. No. of water heaters
2

Max. Vertical and Horizontal
(Total) Vent Length** (L)
25 ft (7.6 m)

DIP switch settings

WARNING

2 5 in
3

2

3

6 in

4

5

6

3

4

5 8 in
6

7

8

5

50 ft (15.2 m) 20 ft (6.1 m) 100 ft (30.5 m) 75 ft (22.9 m) 50 ft (15.2 m 25 ft (7.6 m) 20 ft (6.1 m) 100 ft (30.5 m) 100 ft (30.5 m) 85 ft (25.9 m) 65 ft (19.8 m) 50 ft (15.2 m) 41 ft (12.5 m) 100 ft (30.5 m)

240HX3/340HX3 Indoor
ON 1 2 3 4 5 6 7 8 9 10 OFF
No. 6 : ON / No. 7: OFF
540HX3 Indoor (Upper bank of DIP switches)
ON 1 2 3 4 5 6 7 8 OFF
No. 3 : ON / No. 4: OFF

· Adjust the appropriate DIP switches according to model as shown in the left table. DO NOT adjust the other DIP switches. (Refer to page 23 for the location of the DIP switches.)
· Turn off the power supply to the water heater before changing the DIP switch settings.
· Failure to observe these warnings could lead to carbon monoxide poisoning or death.

6 10 in
7

100 ft (30.5 m) 100 ft (30.5 m)

8

100 ft (30.5 m)

*Diameters of pipes are in accordance with Centrotherm’s specifications. **One elbow is equivalent to 5 ft (1.5 m) linear length, and the maximum number of elbows is 5.

29 Page

GAS SUPPLY AND GAS PIPE SIZING
-General-

Installation Manual Installation

· Do not use this water heater with any gas other than the one listed on the rating plate. · Ensure that any and all gas regulators used are operating properly and providing gas
pressures within the specified range shown below. Excess gas inlet pressure may cause WARNING serious accidents.
· Conversion of this unit from natural gas to propane or vice versa will void all warranty. Contact your local distributor to get the correct unit for your gas type. The manufacturer is not liable for any property and/or personal damage resulting from gas conversions.
· Failure to observe these warnings could result in severe personal injury, carbon monoxide poisoning, or death.

· The minimum and maximum inlet gas pressures are:

Gas type

Inlet gas pressure

Natural Gas Min. 4.0″ W.C. (1.00 kPa) ­ Max. 10.5″ W.C. (2.61 kPa)

Propane

Min. 8.0″ W.C. (1.99 kPa) ­ Max. 13.0″ W.C. (3.23 kPa)

· Inlet gas pressures that fall outside the range of values listed above may adversely affect the performance of the water heater. These pressures are measured when the water heater is in full operation and in standby.
· Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified range will cause dangerous operating conditions and damage to the unit.
· Until testing of the main gas line supply pressure is completed, ensure the gas line to the water heater is disconnected to avoid any damage to the water heater.
· If the gas supply pressure to the heater is greater than the specified maximum, a field-supplied regulator is required. The regulator must lower the gas pressure within the approved range.
· Install the gas regulator according to the manufacturer’s instructions. · The regulator must be sized for the water heater input and provide the specified pressures that are listed on
the rating plate. · In the absence of minimum install distance stated by the regulator manufacturer, it is recommended that
there is at least 3 ft (1 m) of piping between the regulator outlet and the water heater’s inlet gas connection.
-Gas connections-

1. Install a manual gas shutoff valve between the water heater and the gas supply line. 2. When the gas connections are completed, it is necessary to perform a gas leak test either by applying soapy
water to all gas fittings and observing for bubbles or by using a gas leak detection device. · The water heater and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa). · The water heater must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).
3. Always purge the gas line of any debris and/or water before connecting to the gas inlet.

NOTICE

Size the gas pipe appropriately to supply the necessary volume of gas required for the water heater using ANSI Z223.1/NFPA 54. Otherwise, flow capabilities and output temperatures will be limited.

30 Page

Installation Manual Installation

-Natural gas supply piping-

Maximum delivery Capacity in Cubic Feet of Gas per Hour (based on IPS Pipe carrying Natural Gas with 0.60

Specific Gravity with a Pressure Drop of 0.5″ W.C.).

Based on Energy Content of 1,000 BTU/Cubic ft: The water heater requires 160 Cubic ft/hr for the 240HX3 model, 180

Cubic ft/hr for the 340HX3 model, and 199 Cubic ft/hr for the 540HX3 model.

The following tables are from NFPA 54.

Unit: Cubic feet per hour

Pipe Size

Length

Diameter

10′ (3 .0 m)

20′ (6.1 m)

30′ (9.1 m)

40′ (12.2 m)

50′ (15.2 m)

60′ (18.3 m)

70′ (21.3 m)

80′ (24.4 m)

90′ (27.4 m)

100′ (30.5 m)

125′ (38.1 m)

150′ (45.7 m)

200′ (61.0 m)

1/2″ 172 118 95

81

72

65

60

56

52

50

44

40

34

3/4″ 360 247 199 170 151 137 126 117 110 104 92

83

71

1″

678 466 374 320 284 257 237 220 207 195 173 157 134

1-1/4″ 1,390 957 768 657 583 528 486 452 424 400 355 322 275

1-1/2″ 2,090 1,430 1,150 985 873 791 728 677 635 600 532 482 412

2″ 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,020 928 794

-Propane (LP) supply piping-

Maximum Capacity of Propane (LP) Based on 11″ W.C. supply pressure at a 0.5″ W.C. pressure drop

Unit: kBTU per hour

Pipe Size

Length

Diameter

10′

20′

(3 .0 m) (6.1 m)

30′ (9.1 m)

40′

50′

60′

70′

80′

90′ 100′ 125′ 150′ 200′

(12.2 m) (15.2 m) (18.3 m) (21.3 m) (24.4 m) (27.4 m) (30.5 m) (38.1 m) (45.7 m) (61.0 m)

1/2″ 268 184 148 126 112 101 93

87

82

77

68

62

53

3/4″ 567 393 315 267 237 217 196 185 173 162 146 132 112

1″ 1,071 732 590 504 448 409 378 346 322 307 275 252 213

1-1/4″ 2,205 1,496 1,212 1,039 913 834 771 724 677 630 567 511 440

1-1/2″ 3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976 866 787 675

2″ 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496 1,260

Gas sizing example (Natural Gas)

Water heater 199,000 BTU/h

Dryer 35,000 BTU/h

5′ (1.5 m)Length 1-1/4″ Pipe size
A
5′ (1.5 m) Length 1-1/4″ Pipe size

10′ (3 m)Length

3/4″ Pipe size

15′ (4.6 m)Length 1″ Pipe size

B

10′ (3 m)Length 1/2″ Pipe size

10′ (3 m )Length 10′(3 m)Length 1″ Pipe size 3/4″ Pipe size

15′ (4.6 m)Length 1/2″ Pipe size
C

Gas meter

Furnace 120,000 BTU/h

Range 65,000 BTU/h

Based on Energy Content of 1,000 BTU/Cubic ft: Divide each appliance’s BTU/h requirement by 1,000 BTU/ft3 to get the appliance’s ft3/h requirement. Take into account the distance the appliance is from the gas meter, then look in the above gas chart to properly size the line. For sections of the gas line supplying gas to more than one appliance (Ex: Point A to Point B), add up the cubic ft per hour requirements of the appliances that are being supplied by that section, and size to the farthest appliance. For Example: The section from A to B supplies gas to the furnace, range and dryer. Adding up the BTU/h requirements and dividing by 1,000 yields a cubic ft per hour requirement of 220 cubic ft of gas per hour. The farthest appliance is the range, which is 50 ft away from the meter. Looking at the above chart, and under the column of 50 ft, Section A to B needs to be 1″ in order to supply 220 cubic ft.

31 Page

WATER CONNECTIONS

Installation Manual Installation

Do not use this appliance if any part has been under water. Immediately contact a qualified installer or service agency to replace a flooded water heater. Do not attempt to repair the unit! It must be replaced! WARNING
NOTICE Do not reverse the hot outlet and cold inlet connections to the water heater. If you reverse the connections, the water heater will not activate properly.

All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for potable water systems.

1. A manual shutoff valve must be installed on the cold water inlet to

the water heater between the main water supply line and the water

heater.

2. In addion, a manual shutoff valve is also recommended on the hot

water outlet of the unit.

Pressure relief valve

3. If the water heater is installed within, or subjected to, a closed loop

water system, a thermal expansion tank or code approved device to

handle thermal expansion must be installed. NOTE: If the plumbing system is subject to water hammer, then it is

Hot outlet

Cold inlet

Gas inlet

recommended that water hammer arrestors be installed.

4. Before installing the water heater, flush the water line to remove all debris, and after installaon is complete,

purge the air from the line. Failure to do so may cause damage to the heater.

5. There is a wire mesh filter within the cold inlet to trap debris from entering your heater. This will need to be

cleaned periodically to maintain opmum flow. (Refer to page 49.)

-Pressure relief valve-
The water heater has a high-temperature shutoff switch built in as a standard safety feature (called a Hi-Limit switch) therefore a “pressure only” relief valve is required. · An approved pressure relief valve is supplied with your water heater and must be installed on the outlet
connection. NOTE: When an isolation valve kit that includes a pressure relief valve is installed on the water heater, use the provided ¾” male NPT plug to close the pressure relief port on the outlet connection. · The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash outward and cause damage or personal injury. · Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6 in (152 mm) from the floor. This discharge tube must allow free and complete drainage without any restrictions. WARNING! Do Not plug the pressure relief valve. · If the pressure relief valve discharges periodically, this may be due to thermal expansion in a closed water supply system. Contact the water supplier or a local plumbing professional on how to correct this situation. · The pressure relief valve must be manually operated periodically to check for correct operation. Before operating the valve manually, check that it will discharge in a place for secure disposal. · No valve must be placed between the relief valve and the water heater.
If another pressure relief valve is used or needs to be replaced, it must meet the following: · The pressure relief valve must conform to ANSI Z21.22 · CSA 4.4 and installation must follow local codes, · The discharge capacity must be at least 160,000 BTU/h for the 240HX3 model, 180,000 BTU/h for the
340HX3 model, and 199,000 BTU/h for the 540HX3 model, · The pressure relief valve needs to be rated for a maximum of 150 psi (1 MPa).

32 Page

Installation Manual Installation
Hot water could be released when the pressure relief valve is opened. This could result in severe personal injury. Before operating the pressure relief valve manually, check that it will discharge in a safe place. If water does not flow freely from the end WARNING of the discharge pipe, turn the gas supply and power OFF and call a qualified person to determine the cause. Refer to the pressure relief valve manufacturer’s instructions for inspection and maintenance requirements.
-X3TM Scale Prevention Technology-
This water heater is equipped with X3TM Scale Prevention Technology to inhibit scale formation within the heat exchanger tubing of this unit. Part of the X3TM Technology’s anti-scale protection comes from the special X3TM Cartridge media. The X3TM Cartridge must be installed into the manifold located on the underside of the heater cabinet prior to operation of the unit (shown as follows). The X3TM system is designed to be hassle-free; eliminating the need to drain the heater for installation, removal, or replacement of the cartridge. X3TM Scale Prevention Technology reduces the formation of scale in the heat exchanger, extending the operating life of the unit in typical potable water installations. Specific water conditions may impact the efficiency of X3TM, such as excessive iron (>0.3 mg/l). Consult a water quality expert to determine if your water is within acceptable X3TM and EPA guidelines. X3TM Technology Installation/Removal Installation 1. Align the symbol with the symbol and insert the X3TM Cartridge into the X3TM manifold 2. Turn it right until the symbol aligns with the symbol. Removal 1. Close the shutoff valve on the cold water supply. 2. Turn off the power supply. 3. Open a hot water fixture to relieve water pressure in the heater. 4. If a drain pan is not installed, place a bucket or pan underneath the X3TM Cartridge as some water may be
present when removing. 5. Turn the X3TM Cartridge left until the symbol aligns with the symbol. 6. Pull down to remove it from the water heater. It is normal for a small amount of water to drip. NOTE: the
cartridge will be full of water. Take care to not tilt it till you can drain the water.
INSTALLATION
REMOVAL
33 Page

CONDENSATE DRAIN

Installation Manual Installation

This high efficiency water heater produces acidic condensate that must be properly drained per local codes. The water heater does not have a built-in neutralizer to raise the pH level. A neutralizer is available from the water heater manufacturer, if needed. Follow the instrucons in this secon in order to install the condensate drain line.
· All preventave measures and safety pracces must be adhered to when draining condensate. The manufacturer will not be responsible for any damage caused by condensate.
· A drain pan, or other means of protecon against water damage, is recommended to be installed under the water heater in case of leaks.
· Discharge condensate (acidic water) in accordance with all local codes and common safety pracces. In the absence of applicable local codes and regulaons, the manufacturer recommends that a condensate neutralizer is installed and dispose the condensate into a drain. See picture on page 35.
· Use corrosion resistant pipe, such as PVC, for the condensate drain line. Do not use metallic pipe.
· The condensate drain does not require a trap.
· A field-supplied bypass is required if a neutralizer is installed. · The condensate drain is at atmospheric pressure (non-pressurized) and therefore must be allowed to drain
freely with gravity only. Ensure that the condensate drain tube is not plugged, blocked, or kinked. Ensure that it slopes downward to allow condensate to flow freely. All porons of the condensate drain (neutralizer and drain tube) must be at a lower elevaon than the water heater to prevent condensate water from building up inside the heat exchanger.
· Do not connect the condensate drain line directly to a condensate pump.
The condensate drain system must be inspected regularly to make sure it drains properly and in accordance with local codes or the part manufacturer’s instrucons.
· Condensate cannot be effecvely neutralized if the neutralizer elements inside the Neutralizer accessory have been completely consumed. If this happens, condensate will remain acidic and can possibly cause damage to items such as pipes, concrete, etc.
· The actual life of the neutralizer may vary, depending on the applicaon and usage. Replace the cartridge when the condensate pH goes below 6.0. This can be tested using litmus pH test strips.
· Please ensure that the cartridge is properly replaced before the neutralizer elements have been completely consumed.

34 Page

Installation without neutralizer

Installation Manual InstallationInstallation with neutralizer
X3TM CARTRIDGE NOT SHOWN FOR CLARITY.

1/2″ Condensate drain tube*

1/2″ MPT Condensate connection

1/2″ Condensate drain tube*

Overflow bypass* (1/2″ Condensate
drain tube)

1/2″ MPT Condensate connection
1/2″ Condensate drain tube
1/2″ MPT x 3/8″ FPT (Included with Neutralizer accessory) Neutralizer cartridge (Included with Neutralizer accessory)
1/2″ FPT x 1/2″ HB (Included with Neutralizer accessory)
1/2″ Condensate drain tube

2″ (50 mm) MIN. distance**

2″ (50 mm) MIN. distance**
Floor drain, standpipe, pump, or other acceptable drain

2″ (50 mm) MIN. distance**
Floor drain, standpipe, pump, or other acceptable drain

*Maintain downward slope, including installations in which the drain is not directly below the heater. **A 2″ (50 mm) minimum distance must be maintained between the condensate line and drain to allow full flow of the condensation.

35 Page

ELECTRICAL CONNECTIONS

Installation Manual Installation

· Ensure that circuit power is turned OFF before you complete the following steps.

· Follow the electrical code requirements of the local authority having jurisdiction. In the

absence of such requirements, follow the current edition of the National Electrical Code

WARNING

ANSI/NFPA 70.

· When servicing or replacing parts within the water heater, label all wires prior to dis-

connection to facilitate an easy and error-free reconnection. Wiring errors can cause

improper and dangerous operation. Verify proper operation after servicing.

· Failure to observe these warnings could result in personal injury or loss of life.

Indoor model comes with a power plug instead of a junction box. The following procedure is for the outdoor model only.
1. The water heater must be electrically grounded. Do not attach the ground wire to either the gas or the water piping.
2. The water heater requires a 120 VAC, 60 Hz electrical power supply that is properly grounded. · A proper disconnect (i.e. on/off switch, power plug, etc.) controlling the main power to the water heater must be provided for service reasons. (Must comply with local codes.) · Connect the power supply to the water heater exactly as shown in the wiring diagram.
3. A green screw is provided in the junction box to ground the connection. 4. The water heater can be hardwired or wired to a plug-in. 5. The use of a surge protector is recommended in order to protect the water heater from power surges.

Outdoor

Ground

Green screw
Connect Power supply 120VAC, 60Hz

Boom view of water heater

View of electrical connecons in the juncon box

36 Page

Installation Manual Installation

TEMPERATURE REMOTE CONTROLLER

-Included accessories-Outdoor models only
· The remote control is an optional accessory that can be installed in a hall, closet, etc., to allow for temperature adjustment without having to go to the heater.
· When installed, the remote will take priority over the built-in controller of indoor models.

Verify that the items listed below are included with the remote controller.

Temperature remote controller

Screws

Fork terminals

Manual

Remote controller cable*

Qty: 1

Qty: 2

Qty: 4

Qty: 1

Qty: 1

100209924 (TM-RE42) It is also an optional accessory as a second remote for the indoor models. Refer to pages 9 and 10. *The optional remote controller (sold separately) has no remote controller cable.

-Installation-

WARNING

· This remote controller is NOT waterproof. · The water heater can only have one remote controller. · Do not install in high temperature environments, high humidity conditions outdoors, in direct
sunlight, or within the reach of children. · Make sure the remote controller does not come into contact with water or oil. · Failure to observe these warnings could result in personal injury or electrical shock.

NOTICE

· Do not place the remote controller cable close to other wires from other products.
· Cables used for the remote controller connection must be: · Minimum 20 gauge wire (No polarity) · Maximum 400 ft (122 m) long