Service Guide

SYSTEM OPERATION
22
electrical disconnect must be provided at the furnace location.
 Line polarity must be observed when making eld
connections.


 0% R R  SS  R R S
    S S    R  J
X

S  R  RSK  R R  J
X      K R 
Connect hot, neutral, and ground wires as shown in the wiring
diagram located on the unit’s blower door. Line polarity must
be observed when making eld connections. Line voltage
connections can be made through either the right or left side
panel.


S  S  S   SR

S S  R
 R  S
 Wire routing must not interfere with circulator blower
operation, lter removal, or routine maintenance.


   RSK  R SK JR R  
R S  R R  R  
S R  R S   S   



R






 

S

R R SR 
R
  R R

 R
SRS   RS

R   S  S
RR  RS JR R 

       



Accessory wiring connections are to be made through the 1/4”
quick connect terminals provided on the furnace integrated
control module. The Humidier and Electronic Air Cleaner
hot and neutral terminals are identied as HUM and EAC. All
eld wiring must conform to applicable codes. Connections
should be made as shown below.
ELECTRONIC
AIR CLEANER
HUMIDIFIER
OPTIONAL
ACCESORIES
12 PIN
CONNECTOR
120 VAC
NEUTRAL
TERMINALS
NEUTRAL
HUM-H
EAC-H
120 VAC
HOT AND
PARK
TERMINALS
INTEGRATED
CONTROL
MODULE


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 humidier terminals (HUM)
are energized with 115 volts whenever the induced draft
blower is energized. The integrated control module electronic
air cleaner terminals (EAC) are energized with 115 volts
whenever the circulator blower is energized.

 Low voltage connections can be made through either
the right or left side panel. Wire routing must not interfere
with circulator blower operation, lter removal, or routine
maintenance.
A 40 V.A. transformer and an integrated electronic control are
built into the furnace to allow use with most cooling equipment.
Consult the wiring diagram, located in the Technical Manual
or on the blower door for further details of 115 Volt and 24
Volt wiring.

The single stage furnace will have a “W” terminal and will use
a single stage thermostat. The following drawing illustrates
the typical eld wiring for a heat only single stage system and
a single stage heating/single stage cooling system. Refer to
the following gures for proper connections to the integrated
control module.