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10
WIRING
WIRE DEHUMIDIFIER TO HVAC EQUIPMENT
• Six wires are required to connect the dehumidifier to the HVAC equipment. See Figure 10.
• Connect wires from the R, C, W, and Y terminals on the dehumidifier to the corresponding terminals on the HVAC equipment
control board.
• On the HVAC equipment control board, disconnect the G wire that comes from the thermostat and use a wire nut (not provided)
to connect the G wire from the thermostat to the G
S
wire on the dehumidifier.
• Connect the G
H
wire from the dehumidifier to the (now open) G terminal on the HVAC equipment control board. Note: the only wire
connected to the G terminal on the HVAC equipment control board should be the G
H
wire from the dehumidifier.
CAUTION
Improper wiring to the HVAC equipment could cause damage to the dehumidifier control and/or the HVAC equipment.
NOTE – When installing the dehumidifier in a system with a power-stealing thermostat, the use of load resistors on
the Y and W terminals are recommended.
THERMOSTAT HVAC EQUIPMENT
OPTIONAL
VENTILATION
DAMPER
OPTIONAL
DEHUMIDIFIER
SYSTEM
DAMPERS
OPTIONAL
OUTDOOR
TEMPERATURE
SENSOR
(Model 4278)
24 VAC
(40 VA min)
TRANSFORMER
DEHUMIDIFIER
CONTROL
WIRE NUT
24 VAC
(10 VA min)
TRANSFORMER
ON
12344321
ON
A
TIMED
BLOWER
2 HOUR
3 HOUR
30 MIN.
1 HOUR
+
B
REMOTE CONTROL
SYSTEM SETUP
CYCLE PERIOD
–
ON
REMOTE
LOCAL
CYCLE TIME
HVAC EQUIPMENT
Cf Gs Gh W YRf
R
C
G
W
YY
W
G
C
R
ODT
SENSOR
DEHVENT
DAMPERDAMPER
SYSTEM
HVAC FAN
VENT DAMPER
DEH DAMPER
REMOTE
BLOWER-OFF
HOUSE
VENT-AUTO
REMOTE-OFF
TEST
60
MIN.
OFF
0
MIN
MIN.
30
FIGURE 10
90-781