Lennox 95G2UHV Installation Instructions Manual page 38

Upflow Application
Left Side Piping
(Standard)
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
Horizontal Application
Right-Side Air Discharge
Figure 62.
IMPORTANT
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).
Page 38 of 58
AUTOMATIC
GAS VALVE
(with manual
shut-off valve)
Gas Valve
DRIP LEG
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
Figure 60. Upflow Applications
Possible Gas Piping Configurations
Gas Valve
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
Figure 61. Horizontal Applications
Possible Gas Piping Configurations
FIELD
PROVIDED
AND INSTALLED
In LP/Propane applications, a 4" BIP nipple must be
installed to allow clearance for the low inlet pressure switch.
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
FIELD
PROVIDED
AND INSTALLED
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.
Issue 1933
Upflow Application
Right Side Piping
(Alternate)
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
Gas Valve
Horizontal Application
Left-Side Air Discharge
Gas Valve
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
IMPORTANT
507266-05