30
HORIZONTAL [UPFLOW MODEL]
MANUAL SHUT-OFF VALVE
JOINT PIPE UNION)
DRIP LEG
GAS LINE HOLE
LINE LOCATION
MANIFOLD
PLUG IN ALTERNATE
GAS LINE HOLE
GAS VALVE
PIPE UNION
BURNERS
PLUG IN
ALTERNATE
GAS LINE
HOLE
DRIP LEG
GAS VALVE
HORIZONTAL[COUNTERFLOW MODEL]
HORIZONTAL[COUNTERFLOW]
GAS LINE
PLUG IN
GAS LINE
HOLE
PIPE UNION
MANIFOLD
GAS VALVE
SHUT OFF VALVE
(UPSTREAM FROM
PIPE UNION)
GAS LINE HOLE
DRIP LEG
Gas Piping Connections
E
DGES
OF
SHEET
METAL
HOLES
MAY
BE
SHARP
. U
SE
GLOVES
AS
A
PRECAUTION
WHEN
REMOVING
HOLE
PLUGS
.
WARNING
DIRECT/STANDARD INLET PIPING
When gas piping enters directly to the gas valve through the stan-
dard 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 semi-rigid connector to the gas
piping can be used outside the cabinet per local codes.
INDIRECT/ALTERNATE INLET PIPING
When gas piping enters indirectly to the gas valve through the
alternate gas inlet hole, the following 1/2 inch pipe fittings (starting
from the gas valve) to reach the outside of the cabinet must be
supplied:
• (1) Close nipple
• (1) 90 degree street elbow
• (1) 2 1/2” pipe nipple
• (1) 90 degree elbow
• Straight Pipe
• 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 the cabinet. A
semi-rigid connector to the gas piping can be used outside
the cabinet per local codes.
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