25
NOTE: For single stage cooling applications, a jumper may be required between Y1 and Y2 at the furnace control in order to achieve
the desired single stage cooling airflow. Use of ramping profiles and dehumidification features require a jumper between Y1 and O.
NOTE: Thermostat “R” required if outdoor unit is equipped with a Comfort Alert™ module or if the out door unit is a
part of the ComfortNet™™ family of equipment AND is wired as a non-communicating system.
SINGLE-STAGE HEATING THERMOSTAT APPLICATION
A single-stage thermostat with only one heating stage may be used to control this furnace. The application of a single-stage
thermostat offers a timed transition from low to high fire. The furnace will run on low stage for a fixed period of time before
stepping up to high stage to satisfy the thermostat’s call for heat. The delay period prior to stepping up can be set at either
a fixed 5 minute time delay or a load based variable time between 1 and 12 minutes (AUTO mode). If the AUTO mode is
selected, the control averages the cycle times of the previous three cycles and uses the average to determine the time to
transition from low stage to high stage.
To use a single-stage thermostat, turn off power to
the furnace, move the thermostat selection DIP switch
to the OFF position. Set the desired transition time
by setting the transition delay DIP switch to the de-
sired ON/OFF position. Turn power back on. Refer to
the following figure.
24 VOLT DEHUMIDISTAT WIRING
The optional usage of a dehumidistat allows the furnace’s
circulator blower to operate at a slightly lower speed (85%
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
R
Y C
NEU
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
R
Figure 29
NOTE: To apply a single-stage Heating Thermostat, the thermostat selector switch on the
Integrated Control Module must be set on single-stage.
Thermostat - Single -Stage Heating with Single-Stage Cooling
R
Y C
Furnace Inte
rated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
NEU
R
Thermostat - Two-Stage Heating with Single-Stage Cooling
Figure 30
W1 W2
Y2
Furnace Integrated
Control Module
Remote
Condensing Unit
(Two-Stage Cooling)
Dehumidistat
[Optional]
Y2
NEU
W1 W2
Y2
Thermostat - Two-Stage Heating with Two-Stage Cooling
Thermostat Wiring Diagrams
Figure 31
3
4
Thermostat
Stage Delay
Move to the ON position
to select two-stage
thermostat or OFF to
select single stage
thermostat
Move to the ON position
to select Auto transition
delay or OFF for 5 minute
transition delay
Heat OFF Delay
DIP Switches
ONOFF
S1
If 3 is ON, #4 is ignored.
Figure 32
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