Goodmans CPG SERIES User Manual
11
(LP) gas is permitted with the use of the factory authorized
conversion kit (see the unit Technical Manual for the appro-
priate kit). For High Altitude derates, refer to the latest edition
of the National Fuel Gas Code NFPA 54/ANSI Z223.1.
conversion kit (see the unit Technical Manual for the appro-
priate kit). For High Altitude derates, refer to the latest edition
of the National Fuel Gas Code NFPA 54/ANSI Z223.1.
NATURAL
Min. 5.0" W.C., Max. 10.0" W.C.
PROPANE
Min. 11.0" W.C., Max. 14.0" W.C.
INLET GAS PRESSURE
IInlet Gas Pressure Must Not Exceed the Maximum Value Shown in Table
Above.
Above.
The minimum supply pressure should not vary from that
shown in the table above because this could prevent the unit
from having dependable ignition. In addition, gas input to the
burners must not exceed the rated input shown on the rating
plate. Overfiring of the unit could result in premature heat
exchanger failure.
shown in the table above because this could prevent the unit
from having dependable ignition. In addition, gas input to the
burners must not exceed the rated input shown on the rating
plate. Overfiring of the unit could result in premature heat
exchanger failure.
P
IPING
IMPORTANT NOTE: To avoid possible unsatisfactory opera-
tion or equipment damage due to under firing of equipment,
do not undersize the natural/propane gas piping from the
meter/tank to the unit. When sizing a trunk line, include all
appliances on that line that could be operated simultaneously.
tion or equipment damage due to under firing of equipment,
do not undersize the natural/propane gas piping from the
meter/tank to the unit. When sizing a trunk line, include all
appliances on that line that could be operated simultaneously.
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. The gas line installation
must comply with local codes, or in the absence of local codes,
with the latest edition of the National Fuel Gas Code NFPA
54/ANSI Z223.1.
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. The gas line installation
must comply with local codes, or in the absence of local codes,
with the latest edition of the National Fuel Gas Code NFPA
54/ANSI Z223.1.
Natural Gas Connection
Length of
Pipe in Feet
1/2
3/4
1
1 1/4
1 1/2
10
132
278
520
1050
1600
20
92
190
350
730
1100
30
73
152
285
590
980
40
63
130
245
500
760
50
56
115
215
440
670
60
50
105
195
400
610
70
46
96
180
370
560
80
43
90
170
350
530
90
40
84
160
320
490
100
38
79
150
305
460
Pressure = .50 PSIG or less and Pressure Drop of 0.3" W.C. (Based
on 0.60 Specific Gravity Gas)
Natural Gas Capacity of Pipe
in Cubic Feet of Gas Per Hour (CFH)
Nominal Black Pipe Size (inches)
B T U H Fu rn ace In p ut
H eating Valu e o f G as (B T U /C u b ic F oo t)
C FH =
Refer to the Proper Piping Practice drawing for the general
layout at the unit. The following rules apply:
layout at the unit. The following rules apply:
1. Use black iron pipe and fittings for the supply piping.
The use of a flex connector and/or copper piping is
permitted as long as it is in agreement with local
codes.
permitted as long as it is in agreement with local
codes.
2. Use pipe joint compound on male threads only. Pipe
joint compound must be resistant to the action of the
fuel used.
fuel used.
3. Use ground joint unions.
4. Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum
of three inches long.
of three inches long.
5. Use two pipe wrenches when making connection to
the gas valve to keep it from turning.
6. Install a manual shut-off valve in a convenient location
(within six feet of unit) between the meter and the
unit.
unit.
7. Tighten all joints securely.
8. The unit must be connected to the building piping by
8. The unit must be connected to the building piping by
one of the following methods:
•
Rigid metallic pipe and fittings
•
Semirigid metallic tubing and metallic fittings
(Aluminum alloy tubing must not be used in exterior
locations)
(Aluminum alloy tubing must not be used in exterior
locations)
•
Listed gas appliance connectors used in accordance
with the terms of their listing that are completely in
the same room as the equipment
with the terms of their listing that are completely in
the same room as the equipment
•
In the prior two methods above the connector or
tubing must be protected from physical and thermal
damage. Aluminum alloy tubing and connectors must
be coated to protect against external corrosion when
in contact with masonry, plaster or insulation or are
subject to repeated wettings by liquids (water - not
rain water, detergents or sewage).
tubing must be protected from physical and thermal
damage. Aluminum alloy tubing and connectors must
be coated to protect against external corrosion when
in contact with masonry, plaster or insulation or are
subject to repeated wettings by liquids (water - not
rain water, detergents or sewage).
BURNER
DOOR
DOOR
DRIP
LEG
LEG
MANUAL
SHUT-OFF
SHUT-OFF
GROUND JOINT
UNION
UNION
TBD
Proper Piping Practice
NOTE: The unit gas supply entrance is factory sealed with
plugs. Keep plugs in place until gas supply is ready to be
installed. Once ready, replace the plugs with the supplied
grommets and install gas supply line.
plugs. Keep plugs in place until gas supply is ready to be
installed. Once ready, replace the plugs with the supplied
grommets and install gas supply line.