Lennox MERIT ML180UHE Installation Instructions Manual page 24

Left Side Piping
MANUAL
(Standard)
MAIN SHUT−OFF
AUTOMATIC
MANUAL
VALVE
GAS VALVE
MAIN SHUT−OFF (With 1/8 in. NPT
AUTOMATIC
VALVE
Plugged Tap
GAS VALVE
(With 1/8 in. NPT
Shown)
Plugged Tap Shown)
GROUND
JOINT
UNION
GROUND
JOINT
UNION
DRIP LEG
Right Side Piping
FIELD
(Alternate)
PROVIDED
AND INSTALLED
DRIP LEG
NOTE − BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
FIGURE 26
Horizontal Applications
Possible Gas Piping Configurations
MANUAL
MAIN SHUT−OFF
VALVE
MANUAL
MAIN SHUT−OFF
Horizontal Application
VALVE
Left−Side Air Discharge
GROUND
JOINT
UNION
GROUND
JOINT
DRIP LEG
UNION
DRIP LEG
MANUAL
MAIN SHUT−OFF
VALVE
GROUND
JOINT
UNION
FIELD
PROVIDED
AND INSTALLED
Horizontal Application
Right−Side Air Discharge
NOTE − BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
DRIP LEG
FIGURE 27
Page 24