507266-04B
Page 38 of 56
Issue 1904
NOTE - BLACK IRON PIPE
ONLY
TO BE ROUTED INSIDE OF CABINET
FIELD
PROVIDED
AND INSTALLED
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
Upflow Application
Right Side Piping
(Alternate)
Gas Valve
In LP/Propane applications, a 4” BIP nipple must be
installed to allow clearance for the low inlet pressure switch.
GROUND
JOINT
UNION
Upflow Application
Left Side Piping
(Standard)
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
AUTOMATIC
GAS VALVE
(with manual
shut-off valve)
Gas Valve
Figure 60.
Upflow Applications
Possible Gas Piping Configurations
Figure 61. Horizontal Applications
Possible Gas Piping Configurations
NOTE - BLACK IRON PIPE
ONLY
TO BE ROUTED INSIDE OF CABINET
FIELD
PROVIDED
AND INSTALLED
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
Horizontal Application
Right-Side Air Discharge
Gas Valve
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
Horizontal Application
Left-Side Air Discharge
Gas Valve
Figure 62.
When testing pressure of gas lines, gas valve must be
disconnected and isolated. See Figure 62. Gas valves
can be damaged if subjected to pressures greater than
1/2 psig (3.48 kPa).
IMPORTANT
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could
result in serious injury, death, or property damage.
Never use an open flame to test for gas leaks. Check
all connections using a commercially available soap
solution made specifically for leak detection. Some
soaps used for leak detection are corrosive to certain
metals. Carefully rinse piping thoroughly after leak test
has been completed.
IMPORTANT