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If it is necessary for the installer to supply additional line voltage
wiring to the inside of the furnace, the wiring must conform to all
local codes, and have a minimum temperature rating of 105°C.
All line voltage wire splices must be made inside the furnace
junction box.
The integrated control module humidifier terminals (HUM) are
energized with 115 volts whenever the induced draft blower is
energized. The integrated control module electronic air cleaner
terminals (EAC) are energized with 115 volts whenever the
circulator blower is energized.
24-Volt Humidifier
A 5" (12.7 cm) long brown wire in the wire harness at the low-fire
pressure switch provides 24 VAC humidifier control. This wire is
powered any time the pressure switch is closed. To connect
24 VAC HUM, connect the 24 VAC line of the humidifier to the 5"
(12.7 cm) brown wire. The connection can be made by either
stripping the wire and using a wire connector or by using a
field-supplied quick connect terminal. The wiring must conform
to all local and national codes. Connect the COM side of the
humidifier to the C terminal on the furnace control board (or to
the COM side of the 24 VAC transformer).
NOTE: Do not connect 115-volt humidifier to these terminals.
GAS SUPPLY AND PIPING
The furnace rating plate includes the approved furnace gas input
rating and gas types. The furnace must be equipped to operate
on the type of gas applied. This includes any conversion kits
required for alternate fuels and/or high altitude.
CAUTION
To prevent unreliable operation or equipment damage,
Goodman 61
the inlet gas supply pressure must be as specified on the
unit rating plate with all other household gas-fired
appliances operating.
Inlet gas supply pressures must be maintained within the ranges
specified in the Inlet Gas Supply Pressure chart. The supply
pressure must be constant and available with all other household
gas-fired appliances operating. The minimum gas supply
pressure must be maintained to avoid unreliable ignition. The
maximum must not be exceeded to keep the furnace from
overfiring.
Inlet Gas Supply Pressure
Natural gas
5.0" W.C. minimum; 10.0" W.C. maximum
Propane gas
11.0" W.C. minimum; 13.0" W.C. maximum
NOTE: Adjusting the minimum supply pressure below the limits in
the Inlet Gas Supply Pressure chart could lead to unreliable
ignition. Gas input to the burners must not exceed the rated input
shown on the rating plate. Overfiring of the furnace can result in
premature heat exchanger failure. Gas pressures in excess of
13" W.C. can also cause permanent damage to the gas control
valve.
At all altitudes, the manifold pressure must be within 0.3" W.C. of
that listed in the Specification Sheet applicable to your model for
the fuel used. At all altitudes and with either fuel, the air
temperature rise must be within the range listed on the furnace
nameplate.
Should this appliance be converted to LP gas, refer to the
instructions included in the factory-authorized LP gas conversion
kit.
High Altitude Derate
NOTE: The furnace will naturally derate itself 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.
High altitude installations may require both a pressure switch and
an orifice change. These changes are necessary to compensate
for the natural reduction in the density of both the gas fuel and
the combustion air at higher altitude.
For installations above 7,000 ft (2,133.6 m), please refer to your
distributor for the required kit(s).
Gas
Altitude
Kit
Natural
None
0 to
7,000 ft
Propane
LPM-05*
(2,133.6 m)
LPM-06*
NOTES:
LPM-05* supports White-Rodgers 2-stage valve only.
LPM-06* supports both Honeywell and White-Rodgers
2-stage volves.
In Canada, gas furnaces are only certified to 4,500 ft
(1,371.6 m).
Contact the distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude
installations. The indicated kits must be used to ensure safe
and proper furnace operation. All conversions must be
performed by a qualified installer or service agency.
Propane Gas Conversion
WARNING
Possible property damage, personal injury or death may
occur if the correct conversion kits are not installed. The
Goodman 52
appropriate kits must be applied to ensure safe and proper
furnace operation. All conversions must be performed by
a qualified installer or service agency.
This furnace is configured for Natural gas. The appropriate
manufacturer's propane gas conversion kit, must be applied for
propane gas installations. Refer to "Propane Gas and/or High
Altitude Installations" section for details.
Contact your distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude
installations. The indicated kits must be used to ensure safe and
proper furnace operation. All conversions must be performed by
a qualified installer or service agency.
Manifold
Pressure
Pressure
High
Low
Switch
Orifice
Stage
Stage
Change
#43
3.5"
1.9"
None
W.C.
W.C.
#55
10.0"
6.0"
None
W.C.
W.C.
17
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