Goodman *CVC96 Installation Instructions Manual page 30

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Semi-rigid metallic tubing and metallic fittings.
Aluminum alloy tubing must not be used in exterior
locations. In order to seal the grommet cabinet
penetration, rigid pipe must be used to reach the
outside of the cabinet. A semi-rigid connector to the
gas piping may be used from there.
•
Use listed gas appliance connectors in accordance with their
instructions. Connectors must be fully in the same room as
the furnace.
•
Protect connectors and semirigid tubing against physical
and thermal damage when installed. Ensure aluminum-alloy
tubing and connectors are coated to protect against external
corrosion when in contact with masonry, plaster , or insulation,
or subjected to repeated wetting by liquids such as water
(except rain water), detergents, or sewage.
Manual Shut Off Valve
(upstream from ground joint pipe union)
*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
The gas piping may enter the left or right side of the furnace
cabinet. The installer must supply rigid pipe long enough to reach
the outside of the cabinet to seal the grommet cabinet penetra-
tion. A semi-rigid connector to the gas piping can be used outside
the cabinet per local codes. 1/2" NPT pipe and fittings are re-
quired. For models with an "L" shaped manifold, a 4 1/2"
long nipple is required. For models with a hook shaped mani-
fold, 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
*Ground
Joint
Pipe Union
Plug in
Alternate
Gas Line
Hole
Gas Valve
Burners
Figure 37
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
COUNTERFLOW - HORIZONTAL RIGHT
Gas Piping Connections
30
Manual Shut Off Valve
Burners
(upstream from
ground joint
pipe union)
*Ground
Joint
Pipe
Union
Drip Leg
Grommet
in Standard
Gas Line
Hole
UPFLOW
Figure 36
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 38
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
Figure 39