REZNOR CA1 Power Venter Kit Installation Guide
- June 11, 2024
- Reznor
Table of Contents
Revision: I-F-B-PV (03-23) 97967-C
Supersedes: I-F-B-PV (03-21) 97967-B
POWER VENTER KIT INSTALLATION
OPTIONS CA1, CA2, AND CA3 FOR UNIT HEATER MODELS F AND B
IMPORTANT SAFETY INFORMATION
Please read all information in this manual thoroughly before installing the
power venter kit. Pay attention to all dangers, warnings, cautions, and notes
highlighted in this manual. Safety markings should not be ignored and are used
frequently throughout to designate a degree or level of seriousness.
DANGER: A danger statement describes a potentially hazardous situation
that if not avoided, will result in severe personal injury or death and/or
property damage.
WARNING: A warning statement describes a potentially hazardous situation
that if not avoided, can result in severe personal injury and/or property
damage.
CAUTION: A caution statement describes a potentially hazardous situation
that if not avoided, can result in minor or moderate personal injury and/or
property damage.
NOTE: A note provides important information that should not be ignored.
DANGER ****
-
Failure to follow safety warnings exactly and/or improper installation, adjustment, alteration, service, or maintenance can result in dangerous operation, serious injury, death, or equipment/ property damage.
-
The information listed in these instructions must be followed during the installation, service, and operation of this unit. Read the installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment. Unqualified individuals should not attempt to interpret these instructions or install this equipment.
-
The gas burner in all Reznor gas-fired equipment is designed and equipped to provide safe, complete combustion. However, if the installation does not permit the burner to receive the proper supply of combustion air, complete combustion may not occur. The result is incomplete combustion which produces carbon monoxide, a poisonous gas that can cause death. Safe operation of indirect-fired gas burning equipment requires a properly operating vent system which vents all flue products to the outside atmosphere. FAILURE TO PROVIDE PROPER
VENTING WILL RESULT IN A HEALTH HAZARD WHICH COULD CAUSE SERIOUS PERSONAL INJURY OR DEATH. -
Always comply with the combustion air requirements in the installation codes and instructions. Combustion air at the burner should be regulated only by manufacturer-provided equipment. NEVER RESTRICT OR OTHERWISE ALTER THE SUPPLY OF COMBUSTION AIR TO ANY HEATER. Indoor units installed in a confined space must be supplied with air for combustion as required by Codes and in the heater installation manual. MAINTAIN THE VENT SYSTEM IN STRUCTURALLY SOUND AND PROPERLY OPERATING CONDITION.
⚠ WARNING ⚠
This power venter kit is designed for use only with Reznor® models F and B
unit heaters and is not applicable to other Reznor brand products or to
appliances not manufactured as Reznor products.
DO NOT DESTROY. PLEASE READ CAREFULLY. KEEP IN A SAFE PLACE FOR FUTURE
REFERENCE.
GENERAL INFORMATION
NOTE: When installation of the power venter is complete, place this
instruction booklet in the instruction envelope supplied with the heater. It
is important that this booklet be kept for future reference.
Application
The power venter is a motorized vent exhauster designed to permit the
operation of Reznor ® gravity-vented model F (fan) or B (blower) unit heaters
in areas of negative pressure up to 0.15 IN WC or where horizontal venting is
required.
Sequence of Operation
When the thermostat calls for heat, the thermostat contacts close the circuit,
which after a delay of approximately 30 seconds, starts the venter. When the
venter starts, air from the venter blower closes the pressure switch built-in
to the venter. This completes the electric circuit to the burner controls and
opens the gas valve. When the thermostat is satisfied, the thermostat closes
the gas valve and deenergizes the time delay relay. Approximately 45 seconds
after the thermostat is satisfied, the venter blower stops and the pressure
switch resets to the OPEN position.
Pre-Installation Checklist
- Read this entire manual
- Ensure that power venter option kit matches unit heater
- Note that size of vent pipe changes with addition of this venter
KIT COMPONENTS
Kit components are shown in Figure 1. Refer to Table 1 for kit and component
PNs. Parts bag components are listed in Table 2. The parts bag, which is
standard for all option kits, contains all items required for any installation
and may include parts that do not apply to your particular installation. The
highlighted parts should always be used.
Table 1. Power Venter Kits and Kit Components
Component
| Option (Voltage)
---|---
CA1 (115V)
| CA2 (208V)|
CA3 (230V)
Unit Size
025–100| 125| 130–200| 250–400| 125| 130–200| 250–400| 125| 130–200|
250–400
PN *****
Option package| 98467| 136862| 98468| 98471| 135441| 98469| 98472| 135442|
98470| 98473
Venter sub-assembly **| 97976| 97976| 97976| 97955| 97977| 97977| 97956|
97978| 97978| 97957
Flue adapter assembly ***| 97823| 146094| 97824| 97825| 146094| 97824|
97825| 146094| 97824| 97825
Conduit, flexible, 3/8-inch × 24 inches| 19680
Parts bag (refer to Table 2)| 97966
Quantity is one (1) except for conduit, which is quantity of two (2).
Includes factory-assembled motor, venter wheel and housing, pressure switch,
time delay relay, and junction box.
Flue adapter assembly for unit size 125 is a flat plate with flanges and a
4-inch collar.
Table 2. Parts Bag Components
Component| Description| PN|
Quantity
Screw| Sheet metal, #10 × 1/2-inch| 11813| 11
Wire connector| Twist-on, orange, Ideal #3-0273| 16354| 13
Box connector| T&B #253| 16199| 3
90-degree| 1417| 1
Bushing| Anti-short, red| 16358| 4
Open/closed, black, Heyco #OCB-625| 148086| 2
Wire assembly| Brown| 98364| 1
Wiring, #18AWG, 105°C| Blue, 60 inches long| 38462| 1
Orange, 60 inches long| 91453| 1
Yellow, 60 inches long| 38463| 1
Brown, 60 inches long| 38464| 1
Black, 36 inches long| 3841| 1
White, 36 inches long| 87880| 1
Label| Warning| 103171| 1
Hanger bracket| Assembly| 96386| 2
Flue restrictor| 1 × 7 inches, unit sizes 125 and 165| 97943| 1
1-1/2 × 7-3/4 inches, unit sizes 130 and 250–300| 97944| 1
2 × 6 inches, unit sizes 075–100| 98664| 1
2-3/4 × 6 inches, unit sizes 025–050| 98665| 1
Wire connector| Twist-on, yellow (for field-connection on model B units)|
16355| 2
KIT INSTALLATION
Install the power venter kit in accordance with the following steps:
⚠ DANGER ⚠
-
This power venter is to be installed by a qualified service agency in accordance with these instructions and in compliance with all codes and requirements of authorities having jurisdiction.
Failure to follow instructions could result in death, serious injury, and/or property damage. The agency performing this work assumes responsibility for this installation. -
Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read these installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment.
-
Ensure that gas supply and electric power to heater is OFF.
-
Remove side panel(s):
a. If heater is fan model with standard two-point suspension, remove both outer side panels to allow installation of two hanger brackets in option package.
b. If heater is fan model with factory-equipped optional four-point suspension or if heater is blower model, remove only left (when facing rear of heater) outer side panel to allow access for wiring connections. Proceed to step 4. -
Install hanger brackets (fan models with two-point suspension only):
⚠ WARNING ⚠
Four-point suspension is required to balance and level the heater when power venter kit is installed.
NOTE: Because the power venter adds weight to the back of the heater, additional suspension points must be used to maintain the unit in a level position without placing a load on the gas valve and piping. With the outer side panel removed, the factory-installed hanger bracket is visible.
a. Remove screw from inner side panel at side of heater between rear of heater and factory-installed hanger bracket. Position hanger bracket from option kit at this location.
b. Insert screw removed in step 3a through slotted hole in hanger bracket—top hole for unit sizes 025–125, bottom hole for unit sizes 130–400—and secure bracket to inner side panel as shown in Figure 2, DETAIL A. Slide hanger bracket up against top of inner side panel, align clearance hole and cage nut, and tighten screw.
c. Repeat steps 3a and
3b to install hanger bracket on opposite side of heater.
NOTE: To prevent the outer side panel from being removable for future service, do not lock the hanger rod to the outer panel.
d. If heater is already installed, install hanger rods at two new suspension points. Ensure that heater is level and that hanger rods are locked to inner panel using locknuts as shown in Figure 2, DETAIL B. -
Install flue restrictor (all unit sizes except 200 and 400):
⚠ WARNING ⚠
The flue restrictor controls the volume of dilution airflow through the draft hood and vent pipe. For safe and efficient operation, the correct flue restrictor must be installed where required.
NOTES:
• There are four flue restrictors (rectangular pieces of sheet metal) included in the parts bag of the option package.
• Measure the flue restrictor before installing to ensure the correct size.
• Heaters manufactured before OCT 1989 have a fixed vertical vent outlet. If the heater being serviced has a fixed vertical vent outlet, install the flue restrictor on the flue adapter assembly over the fixed vent outlet.
• Unit sizes 200 and 400 DO NOT require a flue restrictor.
a. Refer to Table 2 to select appropriate flue restrictor.
NOTE: The flue adapter assembly with a 4-inch flue collar for unit size 125 (see Figure 3, DETAIL
A) is different from that for other unit sizes.
b. Position flue restrictor across flue opening inside flue adapter assembly from kit, align flue restrictor holes shown in Figure 3, and secure restrictor to assembly using two sheet metal screws.
-
Remove existing flue collar assembly:
a. For unit sizes 025, 050, 075, 100, 130, 165, and 200: remove and discard factory-installed flue collar assembly (if heater was manufactured before OCT 1989, it has fixed vertical vent outlet so there is nothing to remove).
b. For unit size 125: if heater is already installed, remove and discard flue collar plate with 7-inch collar. If heater has not been installed, proceed to step 6.
c. For unit sizes 250, 300, and 400: if heater is already installed, remove and discard flue collar assembly and cover plate. If heater has not been installed, proceed to step 6. -
Install flue adapter assembly:
a. For unit sizes 025, 050, 075, 100, 130, 165, and 200: install flue adapter assembly in accordance with Table 3.
b. For unit size 125: if heater is already installed, replace flue collar assembly removed in step 5a with flue adapter assembly using sheet metal screws in existing holes. If heater has not been installed, install flue adapter assembly in accordance with Table 3.
c. For unit sizes 250, 300, and 400: install flue adapter assembly as follows. If heater has not been installed, install flue adapter assembly in accordance with Table 3.
(1) Center flue adapter assembly (with flue restrictor installed in step 4) on top of heater. Align flue adapter assembly holes (see Figure 3) and mark three new screw holes on top of heater.
(2) Remove flue adapter assembly and drill holes marked in step 6c(1) using 1/8-inch drill bit.
(3) Secure flue adapter assembly to heater using five sheet metal screws.
Table 3. Flue Adapter Assembly Installation
Unit Size
025, 050, 075, 100, 130, 165, 200| 125|
250, 300, 400
1. Center flue adapter assembly (with flue restrictor installed) on top of
heater over flue outlet support.| NOTE: The flue collar assembly with the
7-inch oval flue collar provided with the heater is not used.| NOTE: None of
the flue outlet pieces shipped with the heater are used.
2. Align flue adapter assembly holes (see Figure 3) and mark three new
screw holes on top of heater.| 1. Assemble flue outlet using flue collar
support and flat cover provided with heater and flue adapter assembly (with
flue restrictor
installed). *****
| 1. Remove two center screws (one of each side) that secure flue outlet
pieces in place for shipping. Discard all three pieces and parts bag.
3. Remove flue adapter assembly and drill holes marked in step 2 using
1/8-inch drill bit.| 2. Attach flue collar support as instructed.| 2. Center
flue adapter assembly (with flue restrictor installed) on top of heater.
4. Secure flue adapter assembly to heater using five sheet metal screws.| 3.
Secure flue outlet assembled in step 1 to heater and attach flat cover plate.|
3. Align flue adapter assembly holes (see Figure 3) and mark three new
screw holes on top of heater.
4. Remove flue adapter assembly and drill holes marked in step 3 using
1/8-inch drill bit.
5. Secure flue adapter assembly to heater using five sheet metal screws.
*Refer to the instructions in the heater installation manual or in form I-F/B-HV125 in the standard vent outlet hardware bag (manuals are also found online at www.reznorhvac.com ).
-
Install venter sub-assembly:
NOTE: The venter sub-assembly is assembled and wired at the factory. It includes the venter wheel and housing, the motor, a junction box, a pressure switch, a time delay relay, and on unit sizes 300 and 400, a capacitor.
a. Position venter sub-assembly on flue adapter assembly as shown in Figure 4.
NOTE: To ensure continued proper operation of the sail switch, DO NOT position the venter with the vent opening in a direction below horizontal.
b. Rotate venter to position that best suits vent pipe direction.
c. While holding venter sub-assembly in desired position (never below horizontal), drill hole through connecting overlap in top (see Figure 4) of venter sub-assembly and flue adapter assembly.
d. Secure venter sub-assembly to flue adapter assembly using sheet metal screw.
e. Drill two more holes approximately 120 degrees apart and further secure venter sub-assembly to flue adapter assembly using sheet metal screws.
-
Install conduit:
NOTES:
• All electric wiring and connections, including electrical grounding MUST be in accordance with the National Electric Code ANSI/NFPA No. 70 (latest edition) or, in Canada, with the Canadian Electrical Code, Part I-C.S.A., Standard C22.1. In addition, the installation must comply with local ordinances and applicable gas company requirements.
• The electrical supply wiring connects to the heater on the upper rear of the left side of the unit (facing the back of the heater).
• If a fan model has an optional unit-mounted disconnect switch, the ON/OFF switch is at the electrical supply box.
a. Locate two plugged conduit holes shown in Figure 5—typically either to side or below wiring access panel.
b. Carefully pinch—do not pry—and remove two conduit hole plugs.
c. Install red plastic anti-short bushings in ends of conduit and attach straight box connectors to one end of each flexible conduit.
d. Insert conduit connector with conduit into conduit hole and push connector until it snaps into place. Similarly, install other assembled conduit and connector.
e. Remove cover from venter junction box (see Figure 4) using 1/4-inch socket or screwdriver.
f. Depending on
direction of vent, position straight and 90-degree box connectors at knockouts
in venter junction box as shown in Figure 6, DETAIL A. Ensure that straight
connector is positioned so that it is possible to tighten holding screw.
Secure box connectors using their locknuts and tighten with pliers.
⚠ CAUTION ⚠
The conduit must not interfere with fan operation or contact the hot surfaces of the flue gas collection box or vent pipe.
NOTE: The conduit in the hole closest to the rear of the heater will attach to the 90-degree box connector. The conduit in the hole toward the front of the heater will attach to the straight box connector. Depending on the size of the unit and the direction of the vent, you may have to shorten the lengths of the conduit pieces.
g. Route other ends of conduits installed in step 8d to box connectors as shown in Figure 6, DETAIL B. To shorten, bend the conduit until it breaks. Using a pair of wire snips, finish cutting and deburr the end. -
Install and connect wiring:
⚠ WARNING ⚠
Ensure that all electrical connections are made in accordance with the wiring diagram shown in Figure 7 and that anti-short bushings are installed in line and low voltage conduits.
a. Run two line voltage wires (black and white) through conduit connected at hole nearest to rear of heater and four low voltage wires (brown, yellow, blue, and orange) through conduit connected at hole nearest to front of heater.
b. Install red plastic anti-short bushings in ends of conduits.
OPERATING SEQUENCE
– SET THERMOSTAT AT LOWEST SETTING.
– TURN ON MAIN AND PILOT MANUAL GAS VALVES.
– TURN ON POWER TO UNIT.
– SET THERMOSTAT AT DESIRED SETTING.
– THERMOSTAT CALLS FOR HEAT ENERGIZING THE VENTER MOTOR AFTER A TIME DELAY OF APPROX. 30 SECONDS.
– PRESSURE SWITCH CLOSES FIRING UNIT AT FULL RATE AFTER PILOT PROVING SEQUENCE.
– FAN CONTROL SENSES HEAT EXCHANGER TEMPERATURE. ENERGIZING THE FAN MOTOR.
– WHEN THE THERMOSTAT IS SATISFIED, THE GAS VALVE CLOSES AND THE VENTER MOTOR RUNS FOR APPROX. 45 SEC.
– IF THE FLAME IS EXTINGUISHED DURING MAIN BURNER OPERATION, THE SAFETY SWITCH CLOSES THE MAIN VALVE. IF THE PILOT IS NOT ESTABUSHED WITHIN 120 SEC. THE UNIT LOCKS OUT FOR ONE HOUR, UNLESS IT IS RESET BY INTERRUPTING POWER TO THE CONTROL CIRCUIT. (SEE LIGHTING INSTRUCTIONS)
– SET THERMOSTAT AT LOWEST SETTING FOR SHUTDOWN.
NOTES – THE FOLLOWING CONTROLS ARE FIELD INSTALLED OPTIONS: THERMOSTAT AND 51W SWITCH – THE FOLLOWING CONTROLS ARE FACTORY INSTALLED OPTIONS: NONE
– DOTTED WIRING INSTALLED BY OTHERS.
– CAUTION: IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 105 DEGREES C., EXCEPT FOR SENSOR LEAD WIRE WHICH MUST SE 150 DEGREES C.
– USE 118 GA WIRE FOR ALL WIRING ON UNIT.
– LINE AND BLOWER MOTOR BRANCH WIRE SIZES SHOULD BE OF A SIZE TO PREVENT VOLTAGE DROPS BEYOND 5% OF SUPPLY LINE VOLTAGE.
– ON 230V. UNITS THE CONTROL TRANSFORMER HAS A DUAL VOLTAGE PRIMARY. FOR 230V. UNITS USE BLACK AND YELLOW LEADS (CAP RED). FOR 208V. UNITS USE BLACK AND RED LEADS (CAP YELLOW). ON 115V. UNITS THE CONTROL TRANSFORMER IS A SINGLE VOLTAGE PRIMARY. FOR 115V. UNITS USE BLACK AND YELLOW LEADS
– SEE INSTALLATION INSTRUCTIONS FOR GREATER DETAIL
——————–FACTORY WIRING
——————-FIELD WIRING
G
OPTIONAL (8F4 OPTION) FACTORY WIRIN OR OPTIONAL (CHI OPTION) FIELD WIRING
FACTORY SUPPLIED FIELD INSTALLED WIRING
c. Feed two line voltage wires (black and white) into venter
junction box through 90-degree box connector and tighten cover on connector
being careful not to punch hole in conduit. Feed four low voltage wires
(brown, yellow, blue, and orange) into venter junction box through straight
box connector and tighten holding screw.
d. Connect two line voltage and four low voltage wires in venter junction box using twist-on wire connectors provided in kit. Refer to Figure 7 to ensure proper connections.
NOTE: To make the power venter-to-heater wiring connections, ensure that the left (when facing the rear of the heater) outer side panel that was removed in step 2 has not been reinstalled.
e. Refer to Figure 7 and connect line voltage wires (black and white) in electrical supply box on inner side panel as follows:
(1) On blower units, make connections using two large (yellow) twist-on wire connectors from kit.
NOTE: On fan units equipped with the optional disconnect switch (option AL1), the ON/OFF switch is located at the electrical supply box. When the disconnect switch is OFF, power should be disconnected to the venter.
(2) On fan units equipped with optional disconnect switch (option AL1), ensure that switch is OFF and connect black supply wire in series after disconnect switch.
f. Refer to Figure 7 and connect low voltage wires (orange, brown, blue, and yellow) as follows:
NOTE: Heaters manufactured before JUN 1992 have two metal partitions. Heaters manufactured after MAY 1992 have an upper metal partition and plastic cable holders in the lower position.
(1) Intall black open/closed bushing(s) from kit in metal partition(s)as shown in Figure 8, DETAIL A.
(2) Run low voltage wires (orange, brown, blue, and yellow) down side of heater through top metal partition and either plastic cable holders or bottom metal partition as shown in Figure 8, DETAIL B.
(3) Connect wires in accordance with Figure 7. Ensure that brown wire (ground) is connected properly.
-
Install warning label:
a. Select location—not on hot surface—on fan back panel or blower adapter back to affix warning label from kit.
b. Wipe surface with clean, dry cloth.
c. Peel adhesive backing from label and adhere it to heater.
NOTES:
ADDITIONAL INSTALLATION NOTES:
- Heaters manufactured after APR 1991 are equipped with a blocked vent switch. The optional power venter is designed to function with the blocked vent switch. Do not disable the blocked vent switch when installing the power venter. The blocked vent switch is an important safety device.
- If the heater is not installed, be sure to support the bottom with plywood or other appropriate material. The bottom access panel could be damaged if the bottom is not supported. Install the heater in accordance with the installation instructions supplied with the heater (also found at www.reznorhvac.com ) and with the venting, testing, and warning instructions in this booklet.
VENT INSTALLATION
⚠ DANGER ⚠
All gas-fired units must be vented to the atmosphere.
Vent Piping Dimensions
The addition of the power venter changes the vent system requirements. It is
recommended that a 12- to 18-inch piece of straight pipe be connected to the
venter before attaching an elbow. The required venter outlet diameters are 4
inches round for unit sizes 025–200 or 6 inches round for unit sizes 250–400.
Vent piping length requirements are listed in Table 4.
Table 4. Vent Piping Maximum Length Requirements
Unit Size
|
Without Condensation
|
With Possible Condensation *****
Diameter (Inches)| Length (Feet (Meters)) **| Diameter (Inches)|
Length (Feet (Meters)) **
025| 3 | 30 (9)| 3 | 50 (15.2)
4| 4
050| 3 | 30 (9)| 4| 75 (22.9)
4| 40 (12.2)
075| 4| 50 (15.2)| 5 | 75 (22.9)
100| 4| 50 (15.2)| 5 | 75 (22.9)
125| 4| 75 (22.9)| 8 | 100 (30.5)
130| 4| 75 (22.9)| 5 | 100 (30.5)
165| 4| 75 (22.9)| 5 | 100 (30.5)
200| 4| 50 (15.2)| 6 | 100 (30.5)
250| 4 | 15 (4.6)| 6| 100 (30.5)
5 | 40 (12.2)
6| 75 (22.9)
300| 6| 100 (30.5)| 7 | 125 (38.1)
400| 6| 100 (30.5)| —
65°F surrounding vent pipe and heater on cycle time of three minutes or greater.
Deduct 15 feet (4.6 meters) for each 90-degree elbow and 7 feet (2.1 meters)
for each 45-degree elbow. Elbow deduction does not apply to condensation
determination.
Connect a taper-type enlarger or reducer to the venter outlet. The vent cap
must be the same diameter as the vent system.
Vent Run
Ensure that the vent run conforms to the following:
- Use either vent pipe approved for a Category III heater or appropriately sealed 26-gauge galvanized steel or equivalent single-wall pipe.
- Use only one of the flue pipe diameters listed in Table 4 for the size of heater being installed.
- If the vent pipe passes through a combustible roof, ceiling, side wall, or floor, provide standard wall thimble as made by the vent pipe manufacturer. When venting through a roof, provide adequate height to clear possible snow level. Refer to the Vent Termination (Vent Pipe and Vent Cap) section.
Vent System Joints
Vent system joints depend on the installation and the type of pipe being used.
Ensure that vent system joints conform to the following:
- If using single-wall, 26-gauge or heavier galvanized pipe, secure slip-fit connections using sheet metal screws or rivets. Seal pipe joints either with tape suitable for 550°F or with high-temperature silicone sealant.
- If using category III vent pipe, follow the pipe manufacturer’s instructions for joining pipe sections. When attaching category III pipe to the venter outlet or to the vent cap, make secure sealed joints following a procedure that best suits the style of category III pipe being used.
Vent System Support
Support lateral runs every 6 feet, using noncombustible material such as a
strap steel or chain. Do not rely on the heater for support of either
horizontal or vertical vent pipe.
Vent Termination (Vent Pipe and Vent Cap)
⚠ DANGER ⚠
Horizontal vent termination requires a power venter. DO NOT use a horizontal
vent with a gravityvented heater.
Requirements for both vertical and horizontal vent termination are shown in
Figure 9, Figure 10, Figure 11, and Figure 12. Ensure that the vent terminal
conforms to the following:
- The vent system must be terminated with a suitable vent cap.
- The vent terminal and vent cap must be the same diameter as the vent run.
- Any commercially available cap listed for use as a vent cap for fuel burning appliances is acceptable. For optimum stability under wind conditions, a Reznor option CC1 vent cap is recommended.
- Many local codes require the use of double-wall (type B) vent for the portion of vent pipe (terminal) on the outside of the building. Instructions for installing double-wall (type B) vent pipe to single-wall pipe and to the vent cap are as follows (see Figure 10 and Figure 12):
a. Locate flow arrow on vent pipe and orient pipe in accordance with arrow.
b. Slide vent pipe so that single-wall pipe or vent cap is inside double-wall pipe.
c. Drill hole—slightly smaller than sheet metal screw being used—through vent pipe into single-wall pipe or vent cap.
d. Secure—do not overtighten—vent pipe using 3/4-inch-long sheet metal screw.
e. Drill two additional holes—evenly spaced 120-degrees apart—and secure pipe with two additional screws.
f. Seal any gaps using silicone sealant. If there is annular opening, run bead of sealant in opening, large enough to seal opening but not necessarily large enough to fill full volume of annular area.
Vent Termination (Vent Pipe and Vent Cap)—Continued
Vent Termination Clearances
⚠ DANGER ⚠
- To prevent combustion products from entering the occupied space, all vent terminations must be positioned or located away from fresh air intakes, doors, and windows. Failure to comply could result in severe personal injury or death and/or property damage.
- Consider local snow depth conditions. The vent must be at least 6 inches (152 mm) above the anticipated snow depth.
⚠ WARNING ⚠
Do not locate a vent termination where it may cause hazardous frost or ice
accumulations on adjacent property surfaces.
NOTES:
HORIZONTAL VENT TERMINATIONS:
- The location of the termination of the horizontal vent system must be in accordance with National Fuel Gas Code Z223.1.
- Products of combustion can cause discoloration of some building finishes and deterioration of masonry materials. Applying a clear silicone sealant that is normally used to protect concrete driveways can protect masonry materials. If discoloration is an esthetic problem, relocate the vent or install a vertical vent.
Ensure that distance of vent termination from adjacent public walkways and buildings and window and building openings complies with local codes. Absent any local codes, distance must comply with National Fuel Gas Code Z223.1. Refer to Table 5 to ensure that location complies with minimum clearance requirements.
NOTE: Local codes supersede all provisions in these instructions and in National Fuel Gas Code Z223.1.
Table 5. Minimum Clearance Requirements for Vent Termination Location
Component/Structure|
Minimum Clearance, All Directions Unless Specified (Feet (Meters))
Forced air inlet within 10 feet (3.1 meters) *| 3 (0.9) above
Combustion air inlet of another appliance| 6 (1.8)
Mechanical air supply inlet to any building| Canada: 6 (1.8)
Any building opening (door, window, or gravity air inlet)| 4 (1.2) horizontal
and below
1 (0.3) above
Gas meter, ** electric meter, and relief equipment| US: 4 (1.2) horizontal
Canada: 6 (1.8) horizontal
Gas regulator **| US: 3 (0.9) horizontal
Canada: 6 (1.8) horizontal
Adjoining building or parapet| 6 (1.8)
Adjacent public walkway| 7 (2.1) above
Grade (ground level)| 3 (0.9) above
* Does not apply to the inlet of a direct vent appliance.
** Do not terminate the vent directly above a gas meter or service
regulator.
OPERATIONAL TESTING
Test power venter and heater for proper operation as follows:
⚠ DANGER ⚠
Do not put a heater into service that does not properly exhaust flue gases to
the outside atmosphere.
⚠ WARNING ⚠
The power venter must be installed and wired in accordance with these
installation instructions.
The pressure switch MUST be wired in series with the thermostat to interrupt
the main gas valve circuit. The pressure switch must be checked for proper
operation before and after installation of the vent.
-
Turn ON electric and gas supply.
-
Light heater in accordance with lighting instructions.
-
Test unit for proper venting:
a. With building at maximum negative pressure, operate heater at normal input.
b. Check airflow direction at relief opening of draft hood—room air should be flowing into relief opening (see Figure 13). -
Install junction box cover and heater side panel(s) that were removed in Kit Installation section.
Specifications and illustrations subject to change without notice or incurring
obligations.
Latest version of this manual is available at
www.reznorhvac.com.
©2023 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved.
I-F-B-PV (03-23) 97967-C
Documents / Resources
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REZNOR CA1 Power Venter
Kit
[pdf] Installation Guide
CA1 Power Venter Kit, CA1, Power Venter Kit, Venter Kit
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