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.
To use a single-stage thermostat, turn off power to the furnace, move the thermostat selection DIP switch to the OFF position. Turn
power back on. Refer to the DIP switch chart in this manual.
24 V
OLT
D
EHUMIDISTAT
W
IRING
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 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. Secure the dehumidistat neutral wire (typically the white lead) to the terminal marked “DEHUM” on the furnace integrated
control module.
3. Secure the dehumidistat hot wire (typically the black lead) to the terminal marked “R” on the furnace integrated control
module.
4. 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.
5. If the condenser is a straight cooling unit, install a jumper from Y1 to 0 on the furnace board.
6. Turn ON power to furnace.
To enable the dehumidify function on the integrated control module, set the dehumidification ENABLE DIP switch from OFF to ON.
Once the switch is set, the dehumidify function is enabled during a
combination
call for cooling (T-Stat) and dehumidification
(DEHUM-Stat). Refer to the DIP switch chart in the back section of this manual.
T
O
USE
A
SINGLE
-
STAGE
H
EAT
T
HERMOSTAT
, DIP
SWITCH
#13
ON
THE
FURNACE
CONTROL
BOARD
MUST
BE
SET
TO
THE
OFF
POSITION
.
IMPORTANT NOTE
THERMOSTAT
R
Y
C
NEU
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
R
Thermostat - Single-Stage Heatingwith Single-Stage Cooling
Figure 31
W1
W2
Y2
Furnace Integrated
Control Module
Remote
Condensing Unit
(Two-Stage Cooling)
Dehumidistat
[Optional]
Y2
NEU
W1
W2
Y2
Field installed jumper
to enable cooling
ramping profile when
using a straight
cooling unit.
Thermostat - Two-Stage Heating with Two-Stage Cooling
Figure 33
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 32
THERMOSTAT
S
ET
DIP
SWITCH
#14
TO
ON
POSITION
WHEN
USING
A
2-
STAGE
COOLING
THERMOSTAT
.
IMPORTANT NOTE (COOLING SETUP)
