International comfort products H8UH5050B12C2 Installation Instructions Manual page 16

14. Using pipe joint compound that is resistant to Propane gas,
tighten the fitting assembly into the inlet side of the gas valve.
(Figure 13). Position fitting assembly as shown.
15. Screw the Propane pressure switch into the bushing. Use
pipe dope on connection. Tighten securely.
Note: Do not block inlet port of pressure switch with pipe dope.
Switch will not operate if inlet port is blocked.
16. Remove one yellow wire from the air pressure switch.
Connect this wire to the male insulated yellow wire in the wire
harness provided.
17. Connect the other yellow wire in the harness to the open
termination on the air pressure switch.
18. Connect the other end of the wire harness to the two
terminals on the Propane switch.
Figure 13
Typical Gas Piping and Adding Propane Low Pressure Switch
Propane Low
pressure switch.
Left Hand gas pipe
entry detail
# Union should be outside cabinet except when
clearances disallow, then it may be installed inside
the cabinet .
Manual shut- off valve MUST be upstream of dripleg, union, and furnace.
Gas Piping Requirements
NOTE: The gas supply line must be installed by a qualified service
technician in accordance with all building codes.
1. Install gas piping in accordance with local codes, or in the
absence of local codes, the applicable national codes.
2. It is recommended that a manual equipment shutoff valve be
installed in the gas supply line outside the furnace. Locate
valve as close to the furnace as possible where it is readily
accessible. Refer to Figure 13.
3. Use black iron or steel pipe and fittings or other pipe approved
by local code.
4. Use pipe thread compound which is resistant to natural and
Propane gases.
5. Use ground joint unions and install a drip leg no less than 3"
(76mm) long to trap dirt and moisture before it can enter gas
valve inside furnace.
1
6. Provide a / " (3mm) NPT plugged tapping for test gauge
8
connection immediately up stream of gas supply connection to
furnace.
16
Left pipe entry
Manual shut- off
valve
O
N
O
F F
Drip Leg &
Union #
Propane
Low
Pressure
Switch
Detail
Specifications are subject to change without notice
19. Reassemble all parts in reverse order as removed. Attach
Propane Conversion Label next to the furnace rating plate or
to the front exterior of the furnace.
20. Be sure to engage the main burner orifices in the proper
openings in the burners.
21. After reassembly, turn the gas on and check all joints for gas
leaks using a soapy solution. All leaks must be repaired
immediately.
22. Affix Propane Gas Conversion Rating plate next to furnace
rating plate.
23. Fill and attach Conversion Label to front exterior of furnace.
24. Check operation in Section Checks and Adjustments.
Alterative
O N
O F F
installation
25--25--53
Right Hand gas
pipe entry detail
!
FIRE HAZARD.
Failure to follow this warning could result in
personal injury or death.
Use wrench to hold furnace gas valve when turning
elbows and gas line to prevent damage to the gas
valve and furnace.
7. Use two pipe wrenches when making connections to prevent
furnace gas valve from turning.
NOTE: If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously served another gas appliance.
8. Flexible corrugated metal gas connector may NOT be used
inside the furnace or be secured or supported by the furnace or
ductwork.
9. Properly size gas pipe to handle combined appliance load or
run gas pipe directly from gas meter or Propane gas regulator.
10. Install correct pipe size for run length and furnace rating.
Right pipe entry
O N
O F F
Use elbows and 3" pipe nipple to
connect valve to piping when using
right side gas pipe entry.
O N
O F F
25--25--51
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