22
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.
*
*
*
*
*
*
*
*
*
STANDARD
JUNCTION BOX
LOCATION
ALTERNATE
JUNCTION BOX
LOCATION
Junction Box Relocation
WARNING
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.
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 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 unit voltage when the blower door is opened for servic-
ing. Do not defeat this switch.
24 V
OLT
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.
115 V
OLT
L
INE
C
ONNECTION
OF
A
CCESSORIES
(H
UMIDIFIER
AND
E
LECTRONIC
A
IR
C
LEANER
)
WARNING
T
O AVOID INJURY, ELECTRICAL SHOCK OR DEATH, DISCONNECT ELECTRICAL
POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING.
The furnace’s 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:
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any accessories.
Follow the humidifier or 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 mod-
ule. The humidifier and electronic air cleaner hot and neutral termi-
nals are identified as HUM and EAC. All field wiring must conform to
applicable codes. Connections should be made as shown below.
ELECTRONIC
AIR CLEANER
HUMIDIFIER
OPTIONAL
ACCESSORIES
12 PIN
CONNECTOR
120 VAC
NEUTRAL
TERMINALS
HUM-N
EAC-N
HU
M
-H
EA
C
-H
120 VAC
HOT AND
PARK
TERMINALS
INTEGRATED
CONTROL
MODULE
Accessories Wiring
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 humidifier terminals (HUM) are en-
ergized with 115 volts whenever the induced draft blower is ener-
gized. The integrated control module electronic air cleaner termi-
nals (EAC) are energized with 115 volts whenever the circulator
blower is energized.
24 V
OLT
H
UMIDIFIER
A 1/4” piggy back quick connect terminal on the pressure switch
provides 24VAC humidifier control. This terminal is powered any
time the pressure switch closes. To connect 24VAC HUM, connect
the
24VAC
line of the humidifier to the piggyback on the pressure
switch and the
COM
line of the humidifier to
C
on the control board
terminal strip (or to the
COM
side of the 24VAC transformer). Do
not connect 115V humidifier to these terminals.
XII. GAS SUPPLY AND PIPING
G
ENERAL
The furnace rating plate includes the approved furnace gas input
rating and gas types. The furnace must be equipped to operate on
the type of gas applied. This includes any conversion kits required
for alternate fuels and/or high altitude.
