Lennox ML193UH Installation Instructions Manual page 34

WARNING
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.
Upflow Application
Left Side Piping
(Standard)
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
Horizontal Application
Right-Side Air Discharge
1/2" NPT
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
FIGURE 55
Horizontal Applications
Possible Gas Piping Configurations
NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
FIGURE 56
FIELD
PROVIDED
AND INSTALLED
MANUAL
MAIN SHUT-OFF
VALVE
GROUND
JOINT
UNION
DRIP LEG
FIELD
PROVIDED
AND INSTALLED
Page 34
Upflow Application
Right Side Piping
(Alternate)
1/2" NPT
MANUAL
MAIN SHUT-OFF
GROUND
JOINT
UNION
DRIP LEG
Horizontal Application
Left-Side Air Discharge
MAIN SHUT-OFF
GROUND
VALVE
MANUAL
VALVE
JOINT
UNION
DRIP LEG