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Installer's Guide
The Furnace must be isolated from the gas supply pip-
ing by closing its individual manual shut-off Valve dur-
ing any pressure testing of the gas supply piping system
at test pressures equal to or less than 1/2 psig (3.5 kPa).
NOTE: Maximum pressure to the Gas Valve for natural
gas is 13.8" W.C. Minimum pressure is 5.0" W.C. Maxi-
mum pressure to the Gas Valve for propane is 13.8"
W.C. Minimum pressure is 11.0" W.C.
All gas fittings must be checked for leaks using a soapy
solution before lighting the Furnace.
CHECK WITH AN OPEN FLAME!
AIR FLOW
MAIN MANUAL
SHUTOFF VALVE
GROUND UNION
JOINT
HORIZONTAL FURNACE GAS PIPING MAY BE FROM EITHER SIDE
Figure 15
20
DO NOT
AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF
DRIP LEG
(Typical UPFLOW Furnace in horizontal configuration shown)
Figure 14
LEFT SIDE PIPING (STANDARD)
RIGHT SIDE PIPING (OPTIONAL)
TOP VIEW OF RIGHT SIDE PIPING
GROUND UNION
JOINT
MAIN MANUAL
SHUTOFF VALVE
AIR FLOW
DRIP LEG
AUTOMATIC GAS VALVE
WITH MANUAL SHUTOFF
18-CD24D1-2
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