27
24 VOLT T HERMOSTAT W IRING
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
Low voltage connections can be made through either the right or
left side panel. Thermostat wiring entrance holes are located in the
blower compartment. Wire routing must not to interfere with circu-
lator blower operation, filter removal, or routine maintenance. Re-
fer to the following figure for thermostat connections to the inte-
grated control module terminal strip.
W
W
W
Y
Y
Y
C
C
R
R
R
G
G
W
Y
C
R
G
HEATING
ROOM
THERMOSTAT
HEATING AND
COOLING ROOM
THERMOSTAT
FURNACE
FURNACE
REMOTE
CONDENSING
UNIT
Thermostat Diagram
This furnace is equipped with a 40 VA transformer to facilitate use
with most cooling equipment. Consult the wiring diagram, located
on the blower compartment door, for further details of 115 Volt and
24 Volt wiring.
GME95 FURNACE WITH 2-STAGE CONDENSER FIELD WIRING
The GME95 model furnaces may be used with a 2-stage outdoor
air conditioner. A two stage cooling/single stage gas heat thermo-
stat is required, in addition to a field supplied relay. The relay must
have a 24VAC coil and contacts rated for up to 1 horse power at
125VAC.
1. Install the field supplied relay on the control mounting panel
near the furnace ignition control. The relay should be
installed such that the motor leads will reach the relay
contact terminals.
2. Connect the “Y2” (high stage cool) thermostat terminal to
one coil terminal of the field supplied relay. Connect the
other field supplied relay coil terminal to the “C” terminal on
the furnace ignition control. Typical 18AWG thermostat wire
may be used.
3. Connect the common terminal of the field supplied relay to
the “LINE-H” terminal on the furnace ignition control. Use
wiring having copper conductors only and a temperature
rating of at least 105°C.
4. Using the GME95 airflow tables in this manual, determine
the motor speed tap needed to deliver the required high
stage cooling airflow. Connect the selected motor speed
tap to the normally open terminal on the field supplied relay.
Use wiring having copper conductors only and a temperature
rating of at least 105°C.
5. See the following wiring schematic.
Furnace
Control
Remote Condensing Unit
Heating/Cooling
Room Thermostat
Y
Y1
Y1 Y2
Lo-Heat
Hi-Heat
Cool
Line-H
T4
T2
T3
T5
ECO-TECH
MOTOR
Field
Supplied
Relay
Y2
Field Wiring for GME95 Furnacewith 2-Stage Condenser
115 VOLT LINE CONNECTION OF ACCESSORIES (ELECTRONIC
AIR C LEANER)
HIGH VOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
SERVICING
OR
CHANGING
ANY
ELECTRICAL
WIRING
.
WARNING
The furnace’s integrated control module is equipped with line volt-
age accessory terminals for controlling power to an optional field-
supplied electronic air cleaner.
The accessory load specifications are as follows:
Electronic Air Cleaner 1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any accessories.
Follow the air cleaner manufacturers’ instructions for locating,
mounting, grounding, and controlling these accessories. Acces-
sory wiring connections are to be made through the 1/4" quick
connect terminals provided on the furnace integrated control mod-
ule. The electronic air cleaner hot terminal is identified as EAC-H.
The electronic air cleaner neutral terminal is identified as LINE
NEUTRAL. All field wiring must conform to applicable codes. Con-
nections should be made as shown below.
ELECTRONIC
IR CLEANER
OPTIONAL
CCESSORIES
12 PIN
CONNECTOR
120 VAC
NEUTRAL
TERMINALS
120 VAC
HOT AND
PARK
TERMINALS
INTEGRATED
CONTROL
MODULE
Accessories Wiring
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