Page 1
Form CP-CAUA-GC (01-18)
Obsoletes CP-CAUA-GC (04-15)
Gas Conversion Kits and Instructions
Applies to: Model CAUA
General and Warnings
FOR YOUR SAFETY
— WHAT TO DO IF YOU
SMELL GAS
• Do not try to light any
appliance.
• Do not touch any
electrical switch; do not
use any phone in your
building.
• Leave the building
immediately.
• Immediately call your
gas supplier from a
phone remote from the
building. Follow the gas
supplier’s instructions.
• If you cannot reach your
gas supplier, call the
re department.
— Installation and service
must be performed by
a qualied installer,
service agency, or the
gas supplier.
DANGER:
The conversion kit is to be selected and installed by a qualied
service person 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 qualied
agency performing this work assumes responsibility for this
conversion.
In Canada, gas conversion shall be carried out in accordance with the
requirements of the Provincial Authorities having jurisdiction and in
accordance with the requirements of CSA-B149.1 and .2 installation
code.
WARNING
Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, injury, or death.
Read the installation, operation, and maintenance instructions
thoroughly before installing or servicing this equipment.
FOR YOUR SAFETY: Do not store or use gasoline or other
ammable vapors and liquids in the vicinity of this or any
other appliance.
HAZARD INTENSITY LEVELS used in this manual.
1. DANGER: Failure to comply will result in severe personal injury or
death and/or property damage.
2. WARNING: Failure to comply could result in severe personal
injury or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury
and/or property damage.
DANGER:
The gas burner in this gas-red 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.
DANGER
Safe operation of indirect-red gas burning equipment requires a properly operating vent system
which vents all ue products to the outside atmosphere. FAILURE TO PROVIDE PROPER VENTING
WILL RESULT IN A HEALTH HAZARD WHICH COULD CAUSE SERIOUS PERSONAL INJURY OR
DEATH.
If installed as a separated-combustion system, install either the horizontal or vertical combustion
air/vent system illustrated in the heater installation manual, using the concentric adapter supplied.
All installations must comply with the combustion air requirements in the installation codes and
instructions. Units installed in a conned space must be supplied with air for combustion and
ventilation as required by Code and in the heater installation manual. 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. MAINTAIN THE VENT SYSTEM IN
PROPERLY OPERATING CONDITION.
Form CP-CAUA-GC, P/N 170635R9, Page 1
Page 2
Description and
Kit Selection
NOTE: When converting
a unit with a twostage valve (Option
AG2), check for valve
manufacturer. If the unit
has a two-stage WhiteRodgers valve, a new
two-stage gas valve is
required. See page 8 for
details.
FIGURE 1 - View of
Model CAUA Control
Compartment with
Access Panel and
All Sections of
the Burner Cover
Removed
(Wires are not illustrated.)
The gas conversion kits in these instructions are for Model CAUA heaters equipped
with specic single-stage or two-stage valves (see NOTE left). The kits are for operation at sea level. See pages 5-6 for conversion kit application and components. See
page 7 for high altitude burner orices.
In order to verify which conversion kit is compatible to your heater, it is necessary to
know the type of valve that is on the heater. From the rating plate, copy the complete
Model of the heater. Also, copy the manufacturer's name and number found on the
gas valve.
IMPORTANT: Match the actual Model No. of the valve to the one listed for that kit.
If the actual Model No. is different from the one listed, contact your manufacturer
Representative to select and verify parts required for gas conversion.
Gas Conversion
1. Check kit contents to the parts list. (Parts lists are on pages 5-6.)
Instructions
2. Turn off the gas supply at a shutoff valve upstream of the combination gas valve
3. Install the Regulator Spring Kit
The manufacturer of the regulator spring kit and the gas valve
MUST be the same. Spring kits of different manufacturers are not
interchangeable, and each spring kit MUST be used only in the
Form CP-CAUA-GC, P/N 170635R9, Page 2
valve for which the kit is designated.
The conversion kits include two or three regulator spring kits -- one or two for a singlestage valve and one for a two-stage valve. Check the package carefully and choose
the regulator spring kit that corresponds with the valve on the heater. NOTE: The other
regulator spring kit(s) will not be used.
The kits listed in this manual are intended for use on units that will be operated at
sea level. Conversion of a unit using these kits will not alter the input rate. Refer to
the rating plate on the heater for input rate and other appropriate information.
and turn off the electrical supply. Open the control access panel.
WARNING
Page 3
To install a regulator spring conversion kit, follow the valve manufacturer's
installation instructions that are included with the regulator spring kit. After a new
spring kit is installed, it is necessary to adjust the spring for the correct manifold
pressure. This adjustment can only be made after the heater is in operation.
Instructions are in Step No. 7.
4. Install Burner Orices
WARNING
Do not attempt to drill orices. Use factory-supplied orices only.
NOTES: Kits that apply to various sizes of heaters include the quantity of burner ori-
ces required for the largest size of heater. When converting the smaller sizes, there
will be extra burner orices which will not be used. Burner orices in these kits apply to
sea level operation only. For high altitude, see Burner Orice Chart, page 7.
1) Remove all burner cover sections. Depending on when the unit was
manufactured, there will be either two or three sections. If two, there will be
a right and a left section which extend over the front. If three, there will be a
right, a left, and a separate front section.
2) Disconnect the manifold from the valve.
3) Remove the screws that retain the manifold assembly. (See FIGURE 1.)
4) With the manifold assembly removed from the heater, unscrew all of the
existing orices and replace with the orices included in the conversion kit.
5. Re-Assemble the Heater
Reverse the procedure in Step 4 to re-assemble the heater.
Be certain that the manifold is positioned properly in relationship to the burner rack.
Attach the conversion disk to the heater near the gas valve.
6. Check for Gas Leaks
Use a commercial leak detecting uid or a rich soap and water solution. Leaks are
indicated by the presence of bubbles.
a) Turn on the gas shutoff valve upstream of the combination gas valve. Check for
gas leaks between the gas shutoff valve and the combination gas valve. If a leak
is detected, tighten the connection and recheck. When there are no leaks, turn the
manual shutoff valve off.
b) Turn on the electrical supply. Turn on the gas and follow the instructions on
the heater to relight the burner. Check all manifold connections for leaks. If a leak
cannot be stopped by tightening, turn off the gas and the electric, and replace the
part or parts until there are no leaks.
7. Measure the Manifold Pressure
Before attempting to measure or adjust the manifold gas pressure, be certain that
the inlet (supply) pressure is within the specied range (see pressure requirements
in tables below) for the gas being used both when the heater is in operation and
on standby. Incorrect inlet pressure could cause excessive manifold gas pressure
immediately or at some future time.
Follow these requirements and the instructions to measure and, if needed, adjust
the manifold gas pressure:
Pressure Requirements for Natural Gas
Inlet (Supply)Pressure
Manifold
Pressure
Pressure Requirements for Propane
Inlet (Supply) Pressure
Manifold
Pressure
Single stage 3.5" w.c.
2-stage high re 3.5" w.c.
2-stage low re 1.8" w.c.
Single Stage 10" w.c.
2-stage high re 10" w.c.
2-stage low re 5" w.c.
5" w.c. minimum (or as stated on the
rating plate); 14" w.c. maximum
11" w.c. minimum (or as stated on the
rating plate);14" w.c. maximum
Form CP-CAUA-GC, P/N 170635R9, Page 3
Page 4
Gas Conversion
Instructions
(cont'd)
7. Measure the Manifold Pressure (cont'd)
WARNING
Manifold gas pressure must never exceed 3.5" w.c. for natural
gas or 10" w.c. for propane.
Instructions for Measuring and Adjusting Manifold Pressure:
1) Locate the 1/8” outlet pressure tap on the valve. Turn the knob on the top of
the valve to “OFF”. Connect a manometer to the 1/8” pipe outlet pressure tap.
Use a water column manometer that is readable to the nearest tenth of an
inch. (NOTE: A manometer (uid-lled gauge) is recommended rather than a
spring type gauge due to the difculty of maintaining calibration of a spring type
gauge.)
Open the valve and operate the heater. Measure the gas pressure to the
manifold. To measure low re pressure on a two-stage valve, disconnect
the wire from the "HI" terminal on the gas valve and measure the pressure.
Reconnect the wire.
If pressures are correct, remove the manometer and replace the cap. Check for
leakage at the pressure tap tting. Tighten if needed. Continue to Step 8.
If adjustment is required, follow instructions in 2) below.
2) If adjustment is required:
CAUTION: DO NOT bottom out the gas valve regulator
adjusting screw. This can result in unregulated manifold
pressure causing excess overre and heat exchanger failure.
Single-Stage and Two-Stage High Fire - Remove the cap from the outlet
pressure adjusting screw and adjust the manifold pressure. Adjust pressure
by turning the regulator screw IN (clockwise) to increase pressure or OUT
(counterclockwise) to decrease pressure.
Two-Stage Low Fire - Disconnect the wire from the “HI” terminal on the gas
valve. Locate the low re adjusting screw. Turn the regulator screw to adjust the
low re outlet pressure. Re-connect the wire to the gas valve.
Turn up the thermostat. Cycle the burner once or twice to properly seat the
adjustment spring in the valve.
Re-check the pressure(s). When the outlet pressure is right for the installation,
remove the manometer and replace the cap.
Check for leakage at the pressure tap tting. Tighten if needed.
8. Check for safe and proper operation of the heater by operating the heater for at
least one cycle. Observe main burners for complete ame carryover.
WARNING
In the event of improper ignition, wait at least ve minutes before
attempting to relight the heater.
9. Complete the information required on the gas conversion tape and afx the tape to
a clean, dry surface near the heater rating plate. Close the access door.
Form CP-CAUA-GC, P/N 170635R9, Page 4
Page 5
Components Natural to Propane
Conversion Kits
See page 2 for Serial No.
Code information and NOTE
about verifying parts.
The burner orices in these kits are for sea-level operation only. (For high altitude
installation (above 2000 ft), see the Burner Orice Chart on page 7.) All kits include
the quantity of orices required for the largest size of heater. Excess parts may not be
returned for credit.
NOTE: When converting a unit with a two-stage valve (Option AG2), check for valve
manufacturer. If equipped with a Honeywell valve, select the kit below. If equipped
with a 2-stage White-Rodgers valve, a new gas valve is required. See page 8 for
replacement valve, additional required parts, and instructions.
Natural TO Propane Conversion Kit, P/N 269833
Applies to Model CAUA 150
Equipped with
Components:
Qty P/N Description
1 98720
1 260605
1 197207
8 97359 Burner Orice, 1.25 mm
1 64391 Conversion Tape
1 37752 Propane Disk
Any of these Natural Gas Valves
Manufacturer's No.
H/W VR8304M2816
H/W
VR8205M1130
H/W
VR8215S1263
H/W
VR8204Q2418 2-Stage
Nat to LP Spring Kit, H/W 393691, for a VR8105,
VR8205, VR8305 Single-Stage Valves
Nat to LP Spring Kit, H/W 396221 for a VR8215
Single-Stage Valve
Spring Regulator Kit, H/W 396021 (2-stage valve)
Natural TO Propane Conversion Kit, P/N 269834
Applies to Model CAUA 200
Equipped with
Any of these Natural Gas Valves
Manufacturer's No. Type
H/W VR8304-M 2816
H/W
VR8205M1130
H/W
VR8215S1263
H/W
Components:
Qty P/N Description
1 98720
1 260605
1 197207
10 11830 Burner Orice, #55
1 64391 Conversion Tape
1 37752 Propane Disk
Nat to LP Spring Kit, H/W 393691, for a VR8105,
VR8205, VR8305 Single-Stage Valves
Nat to LP Spring Kit,
Stage Valve
Spring Regulator Kit,
VR8204Q2418 2-Stage
H/W
396221 for a VR8215 Single-
H/W
396021 (2-stage valve)
Natural TO Propane Conversion Kit, P/N 170815
Applies to Model CAUA 250
Equipped with
Any of these Natural Gas Valves
Manufacturer's No. Type
W/R 36C68-452
W/R 36H32-441
H/W
VR8305M4009
H/W
Components:
Qty P/N Description
1 82524 Spring Regulator Kit, W/R F920659 (1-stg W/R valves)
1 98720
1 197207
13 97359 Burner Orice, 1.25 mm
1 64391 Conversion Tape
1 37752 Propane Disk
Nat to LP Spring Kit, H/W 393691, for a VR8105, VR8205,
VR8305 Single-Stage valves
Spring Regulator Kit,
VR8304Q4404 2-Stage
H/W
396021 (2-stg valve)
Type
1-Stage
1-Stage
1-Stage
Natural TO Propane Conversion Kit, P/N 170816
Applies to Model CAUA 300
Equipped with
Any of these Natural Gas Valves
Manufacturer's No. Type
W/R 36C68-452
W/R 36H32-441
H/W
VR8305M4009
H/W
VR8304Q4404 2-Stage
Components:
Qty P/N Description
1 82524 Spring Regulator Kit, W/R F920659 (1-stg W/R valves)
1 98720
1 197207
15 11830 Burner Orice, #55
1 64391 Conversion Tape
1 37752 Propane Disk
Nat to LP Spring Kit, H/W 393691, for a VR8105,
VR8205, VR8305 Single-Stage Valves
Spring Regulator Kit, H/W 396021 (2-stg valve)
Natural TO Propane Conversion Kit, P/N 170817
Applies to Model CAUA 350
Equipped with
Any of these Natural Gas Valves
Manufacturer's No. Type
W/R 36C68-452
W/R 36H32-441
H/W
VR8305M4009
H/W
Components:
Qty P/N Description
1 82524 Spring Regulator Kit, W/R F920659 (1-stg W/R valves)
1 98720
1 197207
12 9789 Burner Orice, #53
1 64391 Conversion Tape
1 37752 Propane Disk
VR8304Q4404 2-Stage
Nat to LP Spring Kit, H/W 393691, for a VR8105, VR8205,
VR8305 Single-Stage Valves
Spring Regulator Kit, H/W 396021 (2-stg valve)
Natural TO Propane Conversion Kit, P/N 170818
Applies to Model CAUA 400
Equipped with
Any of these Natural Gas Valves
Manufacturer's No. Type
W/R 36C68-452
W/R 36H32-441
H/W
VR8305M4009
H/W
VR8304Q4404 2-Stage
Components:
Qty P/N Description
1 82524 Spring Regulator Kit, W/R F920659 (1-stg W/R valves)
1 98720
1 197207
14 61653 Burner Orice, 1.55mm
1 64391 Conversion Tape
1 37752 Propane Disk
Nat to LP Spring Kit, H/W 393691, for a VR8105, VR8205,
VR8305 Single-Stage Valves
Spring Regulator Kit,
H/W
396021 (2-stg valve)
1-Stage
1-Stage
1-Stage
Form CP-CAUA-GC, P/N 170635R9, Page 5
Page 6
Components Propane to Natural
Conversion Kits
See page 2 for Serial No.
Code information and NOTE
about verifying parts.
The burner orices in these kits are for sea-level operation only. (For high altitude
installation (above 2000 ft), see the Burner Orice Chart on page 7.)
All kits include the quantity of orices required for the largest size of heater. Excess
burner orices may not be returned for credit.
NOTE: When converting a unit with a two-stage valve (Option AG2), check for valve
manufacturer. If equipped with a Honeywell valve, select the kit below. If equipped
with a 2-stage White-Rodgers valve, a new gas valve is required. See page 8 for
replacement valve, additional required parts, and instructions.
Propane TO Natural Conversion Kit, P/N 269849
Applies to Model CAUA 150
Equipped with
Any of these propane valves
Manufacturer's No. Type
H/W VR8204M1018
H/W VR8205M1148
H/W VR8215S5215
Components:
Qty P/N Description
1 98721
1 261651
1 197208 Spring Conversion Kit,
8 164866 Burner Orice, 2.1mm
1 64391 Conversion Tape
1 1401 Natural Gas Disk
H/W VR8304Q4412 2-Stage
LP to NAT Spring Kit, H/W 394588, for a VR8105,
VR8205, VR8305 Single-Stage Valves
LP to NAT Spring Kit,
Stage Valve
H/W
396222, for a VR8215 Single-
H/W
#3906025 (2-stage valve)
Propane TO Natural Conversion Kit, P/N 269850
Applies to Model CAUA 200
Equipped with
Any of these propane valves
Manufacturer's No. Type
H/W VR8204M1018
H/W VR8205M1148
H/W VR8215S5215
Components:
Qty P/N Description
1 98721
1 261651
1 197208 Spring Conversion Kit,
10 11833 Burner Orice, #44
1 64391 Conversion Tape
1 1401 Natural Gas Disk
H/W VR8304Q4412 2-Stage
LP to NAT Spring Kit, H/W 394588, for a VR8105,
VR8205, VR8305 Single-Stage Valves
LP to NAT Spring Kit,
Stage Valve
H/W
396222, for a VR8215 Single-
H/W
#396025 (2-stage valve)
Propane TO Natural Conversion Kit, P/N 170811
Applies to Model CAUA 350
Equipped with
Any of these propane valves
Manufacturer's No. Type
1-Stage
Components:
Qty P/N Description
1 82525 Spring Conversion Kit, W/R #92-0656 (1-stage W/R valves)
1 98721
1 197208 Spring Conversion Kit,
12 11835 Burner Orice, #37
1 64391 Conversion Tape
1 1401 Natural Gas Disk
W/R 36C68-325
1-StageW/R 36H32-442
H/W VR8305M4819
H/W VR8304Q4412 2-Stage
LP to NAT Spring Kit, H/W 394588, for a VR8105, VR8205,
VR8305 Single-Stage Valves
H/W
#396025 (2-stage valve)
Propane TO Natural Conversion Kit, P/N 170812
Applies to Model CAUA 400
Equipped with
Any of these propane valves
Manufacturer's No. Type
1-Stage
Components:
Qty P/N Description
1 82525 Spring Conversion Kit, W/R #92-0656 (1-stage W/R valves)
1 98721
1 197208 Spring Conversion Kit,
14 45870 Burner Orice, #38
1 64391 Conversion Tape
1 1401 Natural Gas Disk
W/R 36C68-325
W/R 36H32-442
H/W VR8305M4819
H/W VR8304Q4412 2-Stage
LP to NAT Spring Kit, H/W 394588, for a VR8105,
VR8205, VR8305 Single-Stage Valves
H/W
#396025 (2-stage valve)
1-Stage
Propane TO Natural Conversion Kit, P/N 170810
Applies to Models CAUA 250 and CAUA 300
Equipped with
Any of these propane valves
Manufacturer's No. Type
W/R 36C68-325
H/W VR8305M4819
Components:
Qty P/N Description
1 82525 Spring Conversion Kit, W/R #92-0656 (1-stage W/R valves)
1 98721
1 197208 Spring Conversion Kit,
15 11833 Burner Orice, #44
1 64391 Conversion Tape
1 1401 Natural Gas Disk
Form CP-CAUA-GC, P/N 170635R9, Page 6
H/W VR8304Q4412 2-Stage
LP to NAT Spring Kit, H/W 394588, for a VR8105, VR8205,
VR8305 Single-Stage Valves
H/W
#396025 (2-stage valve)
1-StageW/R 36H32-442
Page 7
Burner Orice Chart -
Model CAUA
The gas conversion kits on
pages 5 and 6 include the
standard sea level burner
orices listed as 0-2000 ft in
the chart.
Model CAUA 150 200 250 300 350 400
BURNER ORIFICES Quantity 8 10 13 15 12 14
Natural Gas, 0-2000 ft,
installation in U.S. or Canada
(orices in the conversion kits)
Propane, 0-2000 ft, installation
in U.S. or Canada (orices in
the conversion kits)
Natural
Installed in
Canada
Gas
Propane
20014500 ft
Natural
Gas
Propane
20013000 ft
Natural
Gas
Propane
30014000 ft
Natural
Gas
Propane
40015000 ft
Natural
Installed in
the U.S.
Gas
Propane
50016000 ft
Natural
Gas
Propane
60017000 ft
Natural
Gas
Propane
70018000 ft
Natural
Gas
Propane
80019000 ft
P/N 164866 11833 11833 11833 11835 45870
Size 2.1mm #44 #44 #44 #37 #38
P/N 97359 11830 97359 11830 9789 61653
Size 1.25mm #55 1.25mm #55 #53 1.55mm
P/N 40414 38678 38678 38678 45871 11792
Size #48 #45 #45 #45 #39 #41
P/N 63003 11830 63003 11830 11834 61652
Size 1.2mm #55 1.2mm #55 #54 1.45mm
P/N 84853 38678 38678 38678 45870 45871
Size #47 #45 #45 #45 #38 #39
P/N 97359 11830 97359 11830 11834 9789
Size 1.25mm #55 1.25mm #55 #54 #53
P/N 84853 38678 38678 38678 45871 87391
Size #47 #45 #45 #45 #39 #40
P/N 63003 11830 63003 11830 11834 9789
Size 1.2mm #55 1.2mm #55 #54 #53
P/N 40414 38678 38678 38678 45871 11792
Size #48 #45 #45 #45 #39 #41
P/N 63003 11830 63003 11830 11834 61652
Size 1.2mm #55 1.2mm #55 #54 1.45mm
P/N 40414 16590 16590 16590 87391 11792
Size #48 #46 #46 #46 #40 #41
P/N 63003 39658 63003 39658 11834 61652
Size 1.2mm #56 1.2mm #56 #54 1.45mm
P/N 40414 84583 84583 84583 11792 84437
Size #48 #47 #47 #47 #41 #42
P/N 39658 39658 39658 39658 11834 61652
Size #56 #56 #56 #56 #54 1.45mm
P/N 39651 84853 84853 84853 84437 84437
Size #49 #47 #47 #47 #42 #42
P/N 63922 39658 63922 39658 11834 11834
Size 1.15mm #56 1.15mm #56 #54 #54
P/N 39651 40414 40414 40414 84437 11828
Size #49 #48 #48 #48 #42 #43
P/N 63922 39658 63922 39658 11830 11834
Size 1.15mm #56 1.15mm #56 #55 #54
Form CP-CAUA-GC, P/N 170635R9, Page 7
Page 8
Gas Conversion - Applies only to Model CAUA with 2-Stage White-Rodgers Valve (Serial No.
Codes H5, H6, M9) NOTE: See example on page 2 for decoding the serial number.
Components required to convert a Model CAUA with a 2-stage White-Rodgers valve:
□ The applicable conversion kit listed on pages 5 - 7. (Spring kits in the conversion kit will not be used.)
□ Parts listed by size in the table:
CAUA
Size
150 177396 177398 107367 37385
200 177396 177398 107367 37385
250 177397 177398 107367 -
300 177397 177398 107367 -
350 177397 177398 107367 -
400 177397 177398 107367 -
2-stage Gas Valve Brass
Natural Gas Propane
Plug
3/4 to 1/2 Bushing -
Natural to Propane only
□ If operating above 2000 ft, select orices on page 7.
Instructions - Follow all of the conversion instructions starting on page 2, REPLACING Steps 3, 4, and
5 with the following:
3. Change the Combination Gas Valve (applies to heaters with White-Rodgers 2-stage valve)
1) Mark the wires and disconnect them from the existing valve. Disconnect and remove the valve.
WARNING: The operating valve is the primary safety shutoff. The gas supply line
must be free of dirt or scale before connecting the unit.
2) On the new valve (from the table above), locate the port labeled "pilot". Since the Model CAUA does not
have a pilot, use the brass plug, P/N 107367, to plug the port.
3) Connect the inlet side of the valve to the gas supply line. (Do not connect the valve to the manifold until
after the orices are changed.)
4) Connect the wires to the valve as marked; verify connections with the unit wiring diagram. Consult the valve
manufacturer's literature for details concerning the valve.
4. Install Burner Orices
WARNING: Do not attempt to drill orices. Use factory-supplied orices only.
NOTES: Kits that apply to various sizes of heaters include the quantity of burner orices required for the largest size
of heater. When converting the smaller sizes, there will be extra burner orices which will not be used. Burner orices
in these kits apply to sea level operation only. For high altitude, see Burner Orice Chart, page 7.
1) Remove all burner cover sections. Depending on when the unit was manufactured, there will be either two
or three sections. If two, there will be a right and a left section which extend over the front. If three, there
will be a right, a left, and a separate front section.
2) Remove the screws that retain the manifold assembly. (See FIGURE 1, page 2).
3) With the manifold and control assembly removed from the heater, unscrew all of the existing orices and
replace with the orices included in the conversion kit.
5. Re-Assemble the Heater
Reverse the procedure in Step 4 to re-assemble the heater. When converting Sizes 150 and 200 from natural gas
to propane, use a 3/4" to 1/2" reducing bushing (see chart above) to connect the valve.
Be certain that the manifold is positioned properly in relationship to the burner rack.
Attach the conversion disk to the heater near the gas valve.
Return to page 3 and complete Steps 6 through 9 to check for leaks and check manifold pressure.
Form CP-CAUA-GC, P/N 170635R9, Page 8
Specications & illustrations subject to change without notice and without incurring obligations.
© Nortek Global HVAC LLC 2018. All rights reserved.
All trademarks are the property of their respective owners.
Printed in the U.S.A. (01/18)
Form CP-CAUA-GC (01-18)
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