Gas Piping Connections - Goodman ComfortNet GCVC95 Series Installation Instructions Manual

GROUND JOINT
PIPE UNION
GAS VALVE
BURNERS
MANIFOLD
ALTERNATE GAS
LINE LO CATION
HORIZONTAL [UPFLOW MODEL]
GAS VALVE
BURNERS
MANIFOLD
ALTERNATE GAS
LINE LOCATION
HORIZONTAL[COUNTERFLOW]

Gas Piping Connections

MANUAL SHUT-OFF VALVE
(UPSTREAM FROM GROUND
JOINT PIPE UNION)
DRIP LEG
GROMMET IN STANDARD
GAS LINE HOLE
DRAIN TRAP
PLUG IN ALTERNATE
GAS LINE HOLE
DRAIN TRAP
PLUG IN ALTERNATE
GAS LINE HOLE
D /S I
IRECT TANDARD NLET
E
DGES OF SHEET METAL HOLES
PRECAUTION WHEN REMOVING
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.
I /A I
NDIRECT LTERNATE NLET
When gas piping enters indirectly to the gas valve through the
alternate gas inlet hole the following fittings (starting from the gas
valve) to reach the outside of the cabinet must be supplied:
•
Coupling.
•
90 degree elbow.
•
2 inch close nipple.
•
90 degree elbow.
•
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 so as to seal the grommet cabinet
penetration. A semi-rigid connector to the gas piping can
be used outside the cabinet per local codes.
G P C
AS IPING HECKS
Before placing unit in operation, leak test the unit and gas connec-
tions.
T
O AVOID THE POSSIBILITY
OR OPEN FLAME TO TEST FOR
Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
testing methods.
NOTE: Never exceed specified pressures for testing. Higher
pressure may damage the gas valve and cause subsequent
overfiring, resulting in heat exchanger failure.
Disconnect this unit and shutoff valve from the gas supply piping
system before pressure testing the supply piping system with
pressures in excess of 1/2 psig (3.48 kPa).
Isolate this unit from the gas supply piping system by closing its
external manual gas shutoff valve before pressure testing supply
piping system with test pressures equal to or less than 1/2 psig
(3.48 kPA).
33
P
IPING
WARNING
. U
MAY BE SHARP SE GLOVES
.
HOLE PLUGS
P
IPING
WARNING
,
OF EXPLOSION OR FIRE NEVER
.
LEAKS
AS A
USE A MATCH