SYSTEM OPERATION
11
1
2
C
R
C
G
Y
Optional
Optional
Optional if
feature
supported by
thermostat
1
2
C
R
C
G
Y
When using the furnace with a single stage non-
communicating air conditioner or heat pump use the wiring
methods shown. When using a single stage air conditioner,
the thermostat must be setup for single stage heating and
single stage cooling mode. When using a single stage
heat pump, the thermostat must be setup for dual fuel
operation where the reversing valve is energized in cooling
mode (see Non-Communicating Single Stage Heat Pump
wiring diagram). In both cases airow must be selected
using the tonnage menu where Airow = (400 CFM) x
(Selected Tonnage). Tonnage values range from 1 to 6 in
0.1 increments.
R
C
G
Y
Optional
Optional
R
C
G
Y
1
2
C
Optional
R
C
Y
This is the only
case where setting the
thermostat to heat pump
mode is acceptable.
R
C
G
Y
Optional
Optional
Optional if
feature
supported by
thermostat
1
2
C
R
C
G
Y
C
Y
Remote
Condensing Unit
(Single-Stage Cooling)
The control board is equipped with a 24 volt dehum
input in the thermostat wiring connector to be used with
a thermostat or dehumidistat. Dehumidication mode
allows the air handler’s circulator blower to operate at a
slightly lower speed (85% of calculated speed) during a
combined thermostat call for cooling and thermostat call for
dehumidication or dehumidistat call for dehumidication.
This lower blower speed enhances dehumidication of the
conditioned air as it passes through the AC coil. If using the
dehum input with a thermostat, congure the thermostat
to energize this terminal when dehumidication is desired.
If using an external dehumidistat, connect it between the
R and Dehum terminals. The dehumidistat must operate
on 24 VAC and utilize a switch which closes on humidity
rise. Refer to the low voltage wiring diagrams for additional
wiring details.
R
C
G
Y
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