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115-Volt Line Connection Of Accessories-Electronic Air Cleaner; Make Gas Connections - Whirlpool WFM18 Installation Instructions Manual

80% single-stage multispeed gas furnace


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115-Volt Line Connection of Accessories—
Electronic Air Cleaner
Goodman 6
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
The furnace's integrated control module is equipped with
line-voltage accessory terminals for controlling power to an
optional field-supplied electronic air cleaner.
The accessory load specifications are as follows:
Electronic Air Cleaner—1.0 amp maximum at 120 VAC
Turn off power to the furnace before installing any
Follow the air cleaner manufacturers' instructions for locating,
mounting, grounding and controlling these accessories.
Accessory wiring connections are to be made through the ¹⁄₄"
quick connect terminals provided on the furnace integrated
control module.
The electronic air cleaner hot terminal is identified as EAC-H.
The electronic air cleaner neutral terminal is identified as
All field wiring must conform to applicable codes.
Optional Accessories Wiring
Connections should be made as shown below.
Hot 120 VAC
Optional Accessories
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 electronic air cleaner terminals
(EAC) are energized with 115 volts whenever the circulator
blower is energized.
Control Module
Neutral 120 VAC
Air Cleaner
24VAC Humidifier
The yellow wire connected to the induced draft blower pressure
switch is powered anytime the pressure switch is closed and
provides 24VAC humidifier control.
1. Remove the yellow wire.
2. Connect the supplied brown jumper wire to the pressure
switch terminal.
3. Reconnect the yellow wire to the "piggyback" terminal on the
brown jumper.
4. Connect the 24VAC line of the humidifier to the stripped end
of the brown wire.
NOTE: Using a wire connector or a field-supplied quick
connect terminal can make this connection. The wiring must
conform to all local and national codes.
5. Connect the COM side of the humidifier to the B/C terminal
on the furnace control board (or to the COM side of the
24VAC transformer).
NOTE: Do not connect 155V humidifier to these terminals.

Make Gas Connections

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.
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
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
Propane Gas Conversion
Goodman 52
Possible property damage, personal injury or death may
occur if the correct conversion kits are not installed. The
appropriate kits must be applied to insure 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. See "Propane Gas/High Altitude
Installations" in "Location Requirements."


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