Installations Instructions

30
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.
T HERM OSTAT “R” REQUIRED IF OUTDOOR UNIT IS EQUIPPED W ITH A
C
OM FORT A LERT ™ M ODULE OR IF THE OUTDOOR UNIT IS A PART OF
THE C OM FORT N ET ™ FAM ILY OF EQUIPM ENT .
IMPORTANT NOTE
AUX
DEHUM
W2
C 1
Y1
2 R
W1
Y2
G O
24 V THERMOSTAT CONNECTIONS
Low Voltage Connections with Auxiliary Terminals
Figure 31
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
R
Y C
NEU
Furnace Inte
g
rated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
R
Thermost at - Single-St age Heat ingwit h Si ngle-St age Cool i ng
Figure 32
T O USE A SINGLE - STAGE H EAT T HERM OSTAT , DIP SW ITCH #13 ON THE
FURNACE CONTROL BOARD M UST BE SET TO THE OFF POSITION .
IMPORTANT NOTE
THERMOSTAT
R
Y C
Furnace Integrated
Control Module
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
NEU
R
Thermost at - Two-St age Heat ing wit h Singl e-St age Cooli ng
Figure 33
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.
Thermost at - Two-St age Heat i ng wi t h Two-St age Cooling
Figure 34
S ET DIP SW ITCH #14 TO ON POSITION W HEN USING A 2- STAGE
COOLING THERM OSTAT .
IMPORTANT NOTE (COOLING SETUP)
SINGLE-STAGE HEATING THERMOSTAT APPLICATION
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 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 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 humidit y ri se. Refer to the “Thermostat
Wiring Diagrams” figure for additional wiring details.