23
R
Y
C
NEU
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
R
NOTE:
To apply a single-stage Heating Thermostat, the thermostat
selector switch on the Integrated Control Module
must
be set
on single-stage.
Figure 28
Thermostat - Single -Stage Heating with Single-Stage Cooling
R
Y
C
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
NEU
R
Thermostat - Two-Stage Heating with Single-Stage Cooling
Figure 29
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 30
S
INGLE
-S
TAGE
H
EATING
T
HERMOSTAT
A
PPLICATION
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 step-
ping 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 fur-
nace, move the thermostat selection DIP switch to the OFF
position. Set the desired transition time by setting the tran-
sition delay DIP switch to the desired ON/OFF position. Turn
power back on. Refer to the following figure.
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
ON
OFF
S1
If 3 is ON, #4 is ignored.
Figure 31
24 V
OLT
D
EHUMIDISTAT
W
IRING
The optional usage of a dehumidistat allows the furnace’s circu-
lator blower to operate at a slightly lower speed (85% of desired
speed) during a combined thermostat call for cooling and dehu-
midistat call for dehumidification. This can be done through an
independent dehumidistat or through a thermostat’s DEHUM ter-
minal (if available). This lower blower speed enhances dehumidi-
fication 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.
Refer to the “Thermostat Wiring Diagrams” figure for
additional wiring details.
To install/connect a dehumidistat:
1. Turn OFF power to furnace.
2. To enable the dehumidify function on the integrated control
module, set the dehumidification ENABLE dip switch from
OFF to ON.
3. Secure the dehumidistat neutral wire (typically the white
lead) to the terminal marked “DEHUM” on the furnace
integrated control module.
4. Secure the dehumidistat hot wire (typically the black lead)
to the terminal marked “R” on the furnace integrated
control module.
5. 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.
6. Turn ON power to furnace.
Once the switch is set, the dehumidify function is enabled during
a
combination
call for cooling (T-Stat) and dehumidification
(DEHUM-Stat).
1
2
DEHUM
TRIM ENABLE
ON
OFF
S5
Select ON to enable
trim selected by S3 3 & 4.
Move to the ON position
to enable dehumidification.
Figure 32
