Installation Guide
12
18-HD72D1-6
Diagram 12 - 1 or 2 Stage Cooling w/Variable Speed Gas Furnace
AUX 1
AUX 2
24VAC HOT
COMMON
SOV
COOLING
FAN
HEATING
ODT
RS
AUX1
AUX1
AUX2
AUX2
RC
RH
B/C
O
O
Y1
Y2
Y2
Y1/Ylo
Y/Y2
G
BK
BK
W1
W2
W3
ODT
ODT
RS1
RS1
R
R
B
G
W1
W2
B
Y/Y1
Optional
Outdoor
Sensor*
Optional
Remote
Sensor*
*Caution: Do not run Outdoor/Remote
sensor wires in the same bundle
with HVAC wires. Also, keep away
from high voltage wiring to avoid
interference.
NOTES
:
1. Cut and remove the factory installed BK jumper at
the indoor unit IFC Board (some units may require
DIP switch settings)
2. R & Y2 connections at outdoor are only required for
two stage units
824 COMFORT CONTROL
12- 1 OR 2 STAGE COOLING W/VARIABLE SPEED GAS FURNACE
INDOOR UNIT
OUTDOOR UNIT
2
1
2
Diagram 11 - 1 Stage w/Cooling Gas Furnace
AUX 1
AUX 2
24VAC HOT
COMMON
SOV
COOLING
FAN
HEATING
ODT
RS
AUX1
AUX1
AUX2
AUX2
RC
RH
B/C
O
Y1
Y
Y2
G
BK
W1
W2
W3
ODT
ODT
RS1
RS1
R
B
W3
G
W1
W2
B
Y
Optional
Outdoor
Sensor*
Optional
Remote
Sensor*
*Caution: Do not run Outdoor/Remote
sensor wires in the same bundle
with HVAC wires. Also, keep away
from high voltage wiring to avoid
interference.
824 COMFORT CONTROL
11- 1 STAGE COOLING W/GAS FURNACE
INDOOR UNIT
OUTDOOR UNIT
