27
•
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.
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 32
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 33
Manual Shut Off Valve
(upstream from
ground joint
pipe union)
COUNTERFLOW - HORIZONTAL RIGHT
Figure 34
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 31
