GMES96-U Installation Manual
21
Connect hot, neutral, and ground wires as shown in the wiring
diagram located on the unit’s blower door. For direct vent ap-
plications, the cabinet opening to the junction box must be
sealed air tight using either an UL approved bushing such as
Heyco Liquid Tight or by applying non-reactive UL approved
sealant to bushing.
Line polarity must be observed when making field connections.
Line voltage connections can be made through either the right
or left side panel. The furnace is shipped configured for a left
side electrical connection with the junction box located inside
the burner compartment. To make electrical connections through
the opposite side of the furnace, the junction box must be
relocated to the other side of the burner compartment prior to
making electrical connections. To relocate the junction box,
follow the steps shown in the Junction Box Relocation section.
HIGH VOLTAGE !
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
SERVICING
OR
CHANGING
ANY
ELECTRICAL
WIRING
.
WARNING
L
ABEL
ALL
WIRES
PRIOR
TO
DISCONNECTION
WHEN
SERVICING
CONTROLS
. W
IRING
ERRORS
CAN
CAUSE
IMPROPER
AND
DANGEROUS
OPERATION
. V
ERIFY
PROPER
OPERATION
AFTER
SERVICING
.
CAUTION
HIGH VOLTAGE !
T
O
AVOID
THE
RISK
OF
INJURY
,
ELECTRICAL
SHOCK
OR
DEATH
,
THE
FURNACE
MUST
BE
ELECTRICALLY
GROUNDED
IN
ACCORDANCE
WITH
LOCAL
CODES
OR
IN
THEIR
ABSENCE
,
WITH
THE
LATEST
EDITION
OF
THE
N
ATIONAL
E
LECTRIC
C
ODE
.
WARNING
115 VOLT LINE VOLTAGE CONNECTION OF ACCESSORIES
(HUMIDIFIER AND ELECTRONIC AIR CLEANER)
The furnace integrated control module is equipped with line volt-
age accessory terminals for controlling power to an optional field-
supplied humidifier and/or electronic air cleaner.
The accessory load specifications are as follows:
Turn OFF power to the furnace before installing any accessories.
Follow the humidifier and/or air cleaner manufacturers’ instruc-
tions for locating, mounting, grounding, and controlling these
accessories. Accessory wiring connections are to be made through
the 1/4" quick connect terminals provided on the furnace inte-
grated control module. The humidifier and electronic air cleaner
hot terminals are identified as HUM and EAC. The humidifier
and electronic air cleaner neutral terminals are identified as NEU-
TRAL. All field wiring must conform to applicable codes.
Humidifier 1.0 Amp maximum at 120 VAC
Electronic Air Cleaner 1.0 Amp maximum at 120 VAC
Table 4
If it is necessary for the installer to supply additional line voltage
wiring to the inside of the furnace, the wiring must conform to
all local codes, and have a minimum temperature rating of 105°C.
All line voltage wire splices must be made inside the furnace
junction box.
The integrated control module single humidifier terminal (HUM)
is energized with 115 volts whenever the induced draft blower is
energized. This terminal can also be used to provide 115 volt
power to a humidifier transformer. The remaining primary
transformer wire would be connected to the Line N on the
control board. The integrated control module electronic air
cleaner terminals (EAC) are energized with 115 volts whenever
the circulator blower is energized.
NOTE: Wire routing must not to interfere with circulator blower
operation, filter removal, or routine maintenance.
Figure 26
JUNCTION BOX RELOCATION
Line voltage connections can be made through either the
right or left side panel. The furnace is shipped config-
ured for a left side electrical connection. To make elec-
trical connections through the opposite side of the fur-
nace, the junction box must be relocated to the left side
prior to making electrical connections. To relocate the
junction box, perform the following steps.
1. Remove the burner compartment door.
2. Remove and save the two screws securing the junction
box to the side panel.
3. Relocate junction box and associated plugs and grommets
to opposite side panel. Secure with screws removed in
step 2.
W
IRE
ROUTING
MUST
NOT
INTERFERE
WITH
CIRCULATOR
BLOWER
OPERATION
,
FILTER
REMOVAL
OR
ROUTINE
MAINTENANCE
.
IMPORTANT NOTE