18
18
W1
G
Y
Two-Stage Heating with Single-Stage Cooling
R
W2
B/C
G
R
W1
W2
O
YLO
Y
DEHUM
TWIN
Y
C
NEU
HOT
Furnace Integrated
Control Module
Thermostat
Two-Stage Heating
with
Single-Stage Cooling
(
)
Remote
Condensing Unit
(Single-Stage Cooling)
Dehumidistat
[Optional]
G
Y
Two-Stage Heating with Two-Stage Cooling
R
B/C
G
R
W1
W2
O
YLO
Y
DEHUM
TWIN
NEU
HOT
Furnace Integrated
Control Module
Thermostat
Two-Stage Heating
with
Two-Stage Cooling
(
)
Remote
Condensing Unit
(Two-Stage Cooling)
Dehumidistat
[Optional]
Y
C
YLO
YLO
W2
W1
Thermostat Diagrams
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 Volt
Line Connection of Accessories (Humidifier and Elec-
tronic Air Cleaner)
WARNING
To avoid electrical shock, injury or death, disconnect
electrical power before servicing, or changing any
electrical wiring.
The furnace’s integrated ignition control is equipped with
line voltage 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 manufac-
turers’ instructions for locating, mounting, grounding, and
controlling these accessories. Accessory wiring connec-
tions are to be made through the 1/4" quick connect
terminals provided on the furnace integrated ignition con-
trol. The humidifier and electronic air cleaner hot and
neutral terminals are identified as HUM and EAC. All field
wiring must conform to applicable codes. Connections
should be made as shown in the
“Accessories Wiring”
figure.
EA
C
Li
ne
T
ran
sf
or
me
r
Hu
m
Li
ne
T
ran
sf
or
me
r
EA
C
Hu
m
Air Cleaner
Humidifier
Control Module
Hot 120 VAC
Neutral 120 VAC
Optional
Accessories
{
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 tempera-
ture rating of 105°C. All line voltage wire splices must be
made inside the furnace junction box.
The integrated ignition control humidifier terminals (HUM)
are energized with 115 volts whenever the induced draft
blower is energized. The integrated ignition control elec-
tronic air cleaner terminals (EAC) are energized with 115
volts whenever the circulator blower is energized.
Electrical Connections
