Page 20
FIGURE 18
FIGURE 19
GROUND
JOINT
UNION
AUTOMATIC
GAS VALVE
FIELD
PROVIDED
AND INSTALLED
GROUND
JOINT
UNION
Left Side Piping
(Standard)
Right Side Piping
(Alternate)
AUTOMATIC
GAS VALVE
DRIP LEG
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
(With 1/8 in. NPT
Plugged Ta p Shown)
MANUAL
MAIN SHUT-OFF
VALVE
(With 1/8 in. NPT
Plugged Ta p
Shown)
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
Possible Gas Piping Configurations
Horizontal Application
Left-Side Air Discharge
Horizontal Application
Right-Side Air Discharge
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
FIELD
PROVIDED
AND
INSTALLED
Leak Check
After gas piping is completed, carefully check all eld-in-
stalled piping connections for gas leaks. Use a commer-
cially available leak detecting solution specically manu-
factured for leak detection. Never use an open ame to
test for gas leaks.
The furnace must be isolated from the gas supply system
by closing the individual manual shut-o valve during any
gas supply system at pressures greater than or equal to ½
psig. (3.48 kPa, 14 inches w.c.). This furnace and its com-
ponents are designed, manufactured and independent-
ly certied to comply with all applicable ANSI/CSA stan-
dards. A leak check of the furnace and its components is
not required.
IMPORTANT
When testing pressure of gas lines, gas valve must be
disconnected and isolated. See gure 28. Gas valves
can be damaged if subjected to pressures greater than
1/2 psig (3.48 kPa, 14 inches w.c.)..
CAUTION
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly after
leak test has been completed. Do not use matches,
candles, ame or other sources of ignition to check for
gas leaks.
MANUAL MAIN
SHUT-OFF VALVE
WILL NOT HOLD
NORMAL TEST
PRESSURE
CAP
ISOLATE
GAS VALVE
FURNACE
1/8 NPT PLUG
FIGURE 20
To Next Page
Loading...
