GPG16M Installation Instructions

8
HIGH ALTITUDE DERATE (U.S. INSTALLATIONS ONLY)
Installation of this furnace at altitudes above 2000 ft (610 m) shall be made in accordance with the Listed High Altitude Conversion
Kit available with this furnace.
D’installation de ce générateur de chaleur à des altitudes supérieures à 2000 pi (610 m) doit être effectuée conformément auxinstructions
accompagnant la trousse de conversion pour haute altitude fournie avec cet appareil.
IMPORTANT NOTE: The gas/electric units naturally derate with altitude. Do not attempt to increase the firing rate by changing
orifices or increasing the manifold pressure. This can cause poor combustion and equipment failure. At all altitudes, the
manifold pressure must be within 0.3 inches W.C. of that listed on the nameplate for the fuel used. At all altitudes and with
either fuel, the air temperature rise must be within the range listed on the unit nameplate. Contact your distributor or refer to
the specification sheet for your model for listing of approved high altitude conversion kit(s). Refer to the Installation Manual
provided with the high altitude kit for altitude adjustments.
NOTE: No changes are required up to 2,000 feet. Use the appropriate high altitude kit above 2,000 feet.
PIPING
IMPORTANT NOTE: To avoid possible unsatisfactory operation 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.
Natural Gas Connection
Refer to the Proper Piping Practice drawing for the general 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.
2. Use pipe joint compound on male threads only. Pipe joint
compound must be resistant to the action of the 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.
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.
7. Tighten all joints securely.
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)
• Listed gas appliance connectors used in accordance 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)
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.
Len
g
th 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)
BTUH Furnace Input
Heatin
g
Value of Gas
(
BTU/Cubic Foot
)
CFH =
DRIP LEG
MANUAL
SHUT-OFF
VALVE
GROUND JOINT UNION
(INSTALLED AHEAD OF GAS VALVE)
GROMMET
Proper Piping Practice