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24-Volt Dehumidistat Wiring
The optional usage of a dehumidistat allows the furnace's
circulator blower to operate at a slightly lower speed (82% of
desired speed) during a combined thermostat call for cooling and
dehumidistat call for dehumidification. This can be done through
an independent dehumidistat or through a thermostat's DEHUM
terminal (if available). This lower blower speed enhances
dehumidification of the conditioned air as it passes through the
AC coil. For proper function, a dehumidistat applied to this
furnace must operate on 24 VAC and utilize a switch which opens
on humidity rise.
To install/connect a dehumidistat:
1. Turn off power to furnace.
2. Secure the dehumidistat neutral wire (typically the white lead)
to the terminal marked DEHUM on the furnace integrated
control module.
3. Secure the dehumidistat hot wire (typically the black lead) to
the terminal marked R on the furnace integrated control
module.
4. Secure the dehumidistat ground wire (typically the green lead)
to the ground screw on the furnace junction box.
NOTE: Ground wire may not be present on all dehumidistats.
5. Turn on power to furnace.
To enable the dehumidify function on the integrated control
module, set the dehumidification DEHUM DIP switch from Off to
On.
Once the switch is set, the dehumidify function is enabled during
a combination call for cooling (T-Stat) and dehumidification
(DEHUM-Stat).
ON
9
10
Fossil Fuel Applications
This furnace can be used in conjunction with a heat pump in a
fossil fuel application. A fossil fuel application refers to a
combined gas furnace and heat pump installation which uses an
outdoor temperature sensor to determine the most cost efficient
means of heating (heat pump or gas furnace).
A heat pump thermostat with 3 stages of heat is required to
properly use a 2-stage furnace in conjunction with a heat pump.
Refer to the fossil fuel kit installation instructions for additional
thermostat requirements.
Strictly follow the wiring guidelines in the fossil fuel kit installation
instructions. All furnace connections must be made to the
furnace 2-stage integrated control module and the FURNACE
terminal strip on the fossil fuel control board.
16
OFF
DEHUM
Unused
S5
115-Volt Line Connection of Accessories (Humidifier
and Electronic Air Cleaner)
WARNING
Goodman 115
HIGH VOLTAGE!
To avoid personal injury or death due to
electrical shock, disconnect electrical
power before servicing or changing any
electrical wiring.
The furnace integrated control module is equipped with line
voltage accessory terminals for controlling power to an optional
field-supplied humidifier and/or electronic air cleaner.
The accessory load specifications are as follows:
Humidifier
Electronic Air Cleaner
NOTES:
Turn off power to the furnace before installing any
accessories.
Follow the humidifier or 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 humidifier and electronic air cleaner hot terminals are
identified as HUM and EAC.
The humidifier and electronic air cleaner neutral terminals are
identified as NEUTRAL.
All field wiring must conform to applicable codes.
Connections should be made as shown in the "Optional
Accessories Wiring" illustration.
Optional Accessories Wiring
15-Circuit Connector
Integrated Control Module
Humidifier
Electronic
Air Cleaner
1.0 Amp maximum at 120 VAC
1.0 Amp maximum at 120 VAC
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