508189-01
Issue 2116
Page 22 of 42
11.
Are flame rollout switches tripped? If flame rollout
switches are tripped, call the service technician for
inspection.
Safety or Emergency Shutdown
Turn off unit power. Close manual and main gas valves.
Extended Period Shutdown
Turn off thermostat or set to “UNOCCUPIED” mode.
Close all gas valves (both internal and external to unit)
to guarantee no gas leak into combustion chamber. Turn
off power to unit. All access panels and covers must be in
place and secured.
Heating System Service Checks
C.S.A. Certification
All units are C.S.A. design certified without modifications.
Refer to the 80G2DFE Operation and Installation
Instruction.
Gas Piping
Gas supply piping should not allow more than 0.5” W.C.
drop in pressure between gas meter and unit. Supply gas
pipe must not be smaller than unit gas connection.
Compounds used on gas piping threaded joints should be
resistant to action of liquefied petroleum gases.
If a flexible gas connector is required or allowed by
the authority that has jurisdiction, black iron pipe shall
be installed at the gas valve and extend outside the
furnace cabinet. The flexible connector can then be
added between the black iron pipe and the gas supply
line.
CAUTION
Do not over torque (800 in-lbs) or under torque (350
in-lbs) when attaching the gas piping to the gas valve.
WARNING
Testing Gas Piping
In case emergency shutdown is required, turn off the
main shut-off valve and disconnect the main power to
unit. These controls should be properly labeled by the
installer.
IMPORTANT
When pressure testing gas lines, the gas valve must be
disconnected and isolated. Gas valves can be damaged
if subjected to more than 0.5 psig (14” W.C.). See Figure
14. If the pressure is greater than 0.5psig (14”W.C.), use
the manual shut-off valve before pressure testing to isolate
furnace from gas supply.
Figure 14.
MANUAL MAIN SHUT-OFF VALVE
WILL NOT HOLD TEST PRESSURE
IN EXCESS OF 0.5 PSIG (14”W.C.)
GAS VALVE
CAP
1/8 NPT PLUG
When checking piping connections for gas leaks, use
preferred means. Kitchen detergents can cause harmful
corrosion on various metals used in gas piping. Use of a
specialty Gas Leak Detector is strongly recommended.
Do not use matches, candles, flame or any other source
of ignition to check for gas leaks.
WARNING
Supply Pressure Measurement
A threaded plug on the inlet side of the gas valve provides
access to the supply pressure tap. Remove the threaded
plug, install a field-provided barbed fitting and connect a
manometer to measure supply pressure. Replace the
threaded plug after measurements have been taken. See
