30
Gas Piping Connections—Counterflow
Gas Piping Connections—Horizontal Upflow
Gas Piping Connections—Horizontal Counterflow
NOTES:
■
When the gas line is in the alternate location, swap the
position of the plug and grommet.
■
The drip leg may terminate with a
¹⁄₂
" x
¹⁄₈
" pipe plug to
accommodate line gas pressure measurement.
Direct/Standard Inlet Piping
When gas piping enters directly to the gas control valve through
the standard inlet hole, the installer must supply straight pipe
with a ground joint union to reach the exterior of the furnace. The
rigid pipe must be long enough to reach the outside of the
cabinet to seal the grommet cabinet penetration. A semirigid
connector to the gas piping can be used outside the cabinet
according to local codes.
Indirect/Alternate Inlet Piping
When gas piping enters indirectly to the gas control valve through
the alternate gas inlet hole, the following
¹⁄₂
" pipe fittings (starting
from the gas control valve) must be supplied to reach the outside
of the cabinet:
■
90º street elbow
■
2
¹⁄₂
" pipe nipple
■
90º elbow
■
Straight pipe
NOTE: The straight pipe must be long enough to reach the
outside of the cabinet so as to seal the grommet cabinet
penetration and to install the ground joint union outside of the
cabinet. A semirigid connector to the gas piping can be used
outside the cabinet according to local codes.
A. Manual shutoff valve (upstream
from ground joint pipe union)
B. Alternate gas line location
C. Plug in alternate gas line hole
D. Gas control valve
E. Manifold
F. Burners
G. Grommet in standard gas line hole
H. Ground joint pipe union
I. Drip leg
J. Height required by local codes
A. Gas control valve
B. Ground joint pipe union
C. Manual shutoff valve (upstream
from ground joint pipe union)
D. Drip leg
E. Grommet in standard gas line hole
F. Drain trap
G. Plug in alternate gas line hole
H. Alternate gas line location
I. Manifold
J. Burners
A
B
C
D
E
F
G
H
I
J
C
D
E
B
A
I
H
G
F
J
A. Gas control valve
B. Ground joint pipe union
C. Manual shutoff valve (upstream
from ground joint pipe union)
D. Drip leg
E. Grommet in standard gas line hole
F. Drain trap
G. Plug in alternate gas line hole
H. Alternate gas line location
I. Manifold
J. Burners
A
B
C
D
E
F
G
H
I
J
Goodman 56
Edges of sheet metal holes may be sharp. Use gloves as
a precaution when removing hole plugs.
WARNING
