Goodman *MSS9* Installation Instructions Manual page 27

Alternate Manifold
Gas Line
Location
Gas Valve
*Ground
Joint
Pipe
Union
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
Alternate
Union
Location
Grommet in
Standard Gas Line Hole
Burners
Gas
Manifold
Valve
Drain Trap
UPFLOW - HORIZONTAL LEFT
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.
Burners Manual Shut Off Valve
(upstream from
ground joint
pipe union)
*Ground
Joint
Pipe
Union
Drip Leg
Grommet
in Standard
Gas Line
Hole
UPFLOW
Figure 29
Manual Shut Off Valve
(upstream from
ground joint pipe union)
Drip Leg
Plug in Alternate Gas Line Hole
Plug in Main Gas Line Hole
Figure 31
*Ground
Joint
Pipe Union
Grommet
in Standard
Gas Line
Hole
Drip Leg
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
COUNTERFLOW - HORIZONTAL RIGHT
27
Manual Shut Off Valve
(upstream from ground joint pipe union)
Burners
COUNTERFLOW
Figure 30
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
Figure 32
Gas Piping Connections
Alternate
Gas Line
Location
*Ground
Joint
Pipe Union
Plug in
Alternate
Gas Line
Hole
Gas Valve