27
Field Wiring for WFM19 Furnace with 2-Stage Condenser
115-Volt Line Connection of Accessories (Humidifier
and Electronic Air Cleaner)
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:
NOTES:
■
Turn off power to the furnace before installing any
accessories.
■
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 terminals are identified as
EAC-H.
■
The 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
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.
24-Volt Humidifier
The yellow wire connected to the induced draft blower pressure
switch is powered anytime the pressure switch is closed and
provides 24 VAC humidifier control.
1. Remove the yellow wire and connect the supplied brown
jumper wire to the pressure switch terminal.
2. Reconnect the yellow wire to the “piggyback” terminal on the
brown jumper.
3. Connect the 24 VAC line of the humidifier to the stripped end
of the brown wire.
NOTES:
■
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.
4. Connect the COM side of the humidifier to the B/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.
A. Eco-tech motor
B. Field supplied relay
C. Heating/cooling room thermostat
D. Remote condensing unit
E. Furnace control
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
E
Y
Y1
Y1
Y2
Lo
-H
e
a
t
Hi
-H
e
a
t
Co
o
l
Li
n
e
-H
T4
T2
T3
T5
Y2
A
B
C
D
W
W
R
R
R
G
G
C
C
C
Goodman 115
HIGH VOLTAGE!
WARNING
To avoid personal injury or death due to
electrical shock, disconnect electrical
power before servicing or changing any
electrical wiring.
12-Pin Connector
Integrated
Control
Module
Electronic
Air Cleaner
EAC-H
120 VAC Hot and
Park Terminals
120 VAC
Neutral Terminals
