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Cooling'. Refer to the following figures for proper connections to
the integrated control module.
Low voltage connections can be made through either the right or
left side panel. Thermostat wiring entrance holes are located in
the blower compartment. The following figure shows connec-
tions for a "heat/cool system".
This furnace is equipped with a 40 VA transformer to facilitate
use with most cooling equipment. Consult the wiring dia-
gram, located on the blower compartment door, for further
details of 115 Volt and 24 Volt wiring.
NOTE: Use of cooling ramping profiles and dehum feature
requires a jumper between Y1 and O when a straight cool-
ing unit is used.
IMPORTANT NOTE
T
"R"
HERMOSTAT
REQUIRED IF OUTDOOR UNIT IS EQUIPPED WITH A
C
A
™
OMFORT
LERT
MODULE OR IF THE OUTDOOR UNIT IS A PART OF
C
N
™
THE
OMFORT
ET
FAMILY OF EQUIPMENT
24 V THERMOSTAT CONNECTIONS
Low Voltage Connections with Auxiliary Terminals
The auxiliary contacts are shipped with a factory installed
jumper. As an option, the auxiliary contacts may be wired
to a normally closed float switch. In the event of open
contacts, the gas heat and cooling will be disabled until
the condition is corrected. These are 24 volt terminals
powered internally, do not apply another voltage source to
these terminals.
THERMOSTAT
Y
C
Remote
Condensing Unit
(Single-Stage Cooling)
Thermostat - Single-Stage Heatingwith Single-Stage Cooling
30
.
AUX
Figure 31
R
Furnace Integrated
R
Control Module
NEU
Dehumidistat
[Optional]
Figure 32
IMPORTANT NOTE
T
-
H
O USE A SINGLE
STAGE
EAT
FURNACE CONTROL BOARD MUST BE SET TO THE
THERMOSTAT
Y
C
Remote
Condensing Unit
(Single-Stage Cooling)
Thermostat - Two-Stage Heating with Single-Stage Cooling
Y2
Y2
Field installed jumper
to enable cooling
ramping profile when
using a straight
cooling unit.
Y2
Remote
Condensing Unit
(Two-Stage Cooling)
Thermostat - Two-Stage Heating with Two-Stage Cooling
IMPORTANT NOTE (COOLING SETUP)
S
DIP
#14
ON
ET
SWITCH
TO
.
COOLING THERMOSTAT
S
-S
H
T
INGLE
TAGE
EATING
HERMOSTAT
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 fur-
nace, 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
D
W
OLT
EHUMIDISTAT
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 en-
hances dehumidification of the conditioned air as it passes
through the AC coil. For proper function, a dehumidistat ap-
plied 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.
T
, DIP
#13
HERMOSTAT
SWITCH
OFF
POSITION
R
Furnace Integrated
R
Control Module
NEU
Dehumidistat
[Optional]
Figure 33
W1
W2
Furnace Integrated
W1
W2
Control Module
NEU
Dehumidistat
[Optional]
Figure 34
2-
POSITION WHEN USING A
STAGE
A
PPLICATION
IRING
ON THE
.
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