25
Junction Box Relocation
1. Remove the burner compartment door.
2. Remove and save the 2 screws securing the junction box to
the side panel.
3. Relocate junction box and associated plugs and grommets to
opposite side panel.
4. Secure with screws removed in Step 2.
Junction Box Relocation
To ensure proper unit grounding, the ground wire should run from
the furnace ground screw located inside the furnace junction box
all the way back to the electrical panel.
NOTE: Do not use gas piping as an electrical ground.
To confirm proper unit grounding, turn off the electrical power
and perform the following check.
1. Measure the resistance between the neutral (white)
connection and one of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch
which interrupts the unit voltage when the blower door is opened
for servicing.
NOTE: Do not defeat this switch.
24-Volt Thermostat Wiring
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 interfere with
circulator blower operation, filter removal or routine maintenance.
Refer to the following illustration for thermostat connections to
the integrated control module terminal strip.
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.
NOTE: To apply a single-stage heating thermostat, the
thermostat selector switch on the integrated control module must
be set on single-stage.
115-Volt Line Connection of Accessories (Humidifier
and Electronic Air Cleaner)
The furnace integrated control module is equipped with line
voltage accessory terminals for controlling power to an optional
field-supplied electronic air cleaner.
The accessory load specifications are as follows:
NOTES:
■
Turn off power to the furnace before installing any
accessories.
■
Follow the air cleaner manufacturers’ instructions 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 integrated
control module.
■
The electronic air cleaner hot terminals are identified as
EAC-H.
■
The electronic air cleaner neutral terminals are identified as
NEUTRAL.
■
All field wiring must conform to applicable codes.
■
Connections should be made as shown in the “Optional
Accessories Wiring” illustration.
A. Standard junction box location
B. Alternate junction box location
Edges of sheet metal holes may be sharp. Use gloves as
a precaution when removing hole plugs.
WARNING
*
*
*
*
*
*
*
A
B
HIGH VOLTAGE!
WARNING
To 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
National Electric Code (NEC).
A. Heating room thermostat
B. Furnace
C. Heating and cooling room thermostat
D. Remote condensing unit
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
W
W
W
Y
Y
Y
C
C
R
R
R
G
G
W
Y
C
R
G
A
B
C
B
D
HIGH VOLTAGE!
WARNING
To avoid personal injury or death due to
electrical shock, disconnect electrical
power before servicing or changing any
electrical wiring.
