27
The gas piping may enter the left or right side of the fur-
nace cabinet. The installer must supply rigid pipe long enough to reach the outside of the cabinet to seal the grommet cabinet
penetration. A semi-rigid connector to the gas piping can be used outside the cabinet per local codes. 1/2” NPT pipe and
fittings are required. For models with an “L” shaped manifold, a 4 1/2” long nipple is required. For models with a hook
shaped manifold, a 2” long nipple is required.
A semi-rigid connector to the gas piping can be used outside the cabinet per local codes. From the elbow, the length of
pipe and the fittings required will vary by the side chosen, location of union and cabinet width. The union may be placed
inside or outside of the cabinet.
Alternate
Gas Line
Location
Plug in
Alternate
Gas Line
Hole
Gas Valve
Burners
Manual Shut Off Valve
(upstream from ground joint pipe union)
Drip Leg
Grommet
in Standard
Gas Line
Hole
*Ground
Joint
Pipe Union
*Ground
Joint
Pipe Union
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
COUNTERFLOW
Figure 30
Drip Leg
Plug in Main Gas Line Hole
Alternate
Union
Location
Manual Shut Off Valve
(upstream from
ground joint pipe union)
Gas
Valve
Burners
Drain Trap
Manifold
Plug in Alternate Gas Line Hole
Grommet in
Standard Gas Line Hole
UPFLOW - HORIZONTAL LEFT
Figure 31
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
COUNTERFLOW - HORIZONTAL RIGHT
Figure 32
Gas Piping Connections
Alternate
Gas Line
Location
Gas Valve
Burners
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
Drip Leg
Grommet
in Standard
Gas Line
Hole
*Ground
Joint
Pipe
Union
*Ground
Joint
Pipe
Union
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
Manifold
UPFLOW
Figure 29
