Installation Guide
page 12
18-HD72D1-1
Diagram 12 - 1 or 2 Stage Cooling w/Variable Speed Oil Furnace
Diagram 11 - 1 Stage Cooling w/Non-Variable Speed Oil Furnace
AUX 2
AUX 1
24VAC HOT
COMMON
SOV
COOLING
FAN
HEATING
ODT
RS
AUX2
AUX2
AUX1
AUX1
RC
RH
B/C
O
Y1
Y
Y2
G
BK
W1
W2
W3
ODT
ODT
RS1
RS1
R
C
G
T
T
B/C
Y
Optional
Outdoor
Sensor
Optional
Remote
Sensor
NOTES
:
1. Remove factory RC/RH jumper for systems
with seperate heating and cooling low voltage
transformers
824 COMFORT CONTROL
11- 1 Stage Cooling w/Non-Variable Speed Oil Furnace
FURNACE
FAN CENTER
OIL BURNER
PRIMARY
AIR
CONDITIONER
T
T
AUX 2
AUX 1
24VAC HOT
COMMON
SOV
COOLING
FAN
HEATING
ODT
RS
AUX2
AUX2
AUX1
AUX1
RC
RH
B/C
O
O
Y1
Y2
Y2
G
BK
W1
W2
W3
ODT
ODT
RS1
RS1
R
R
B
BK
G
W1
B
Y1
Y1/Ylo
Y/Y2
Optional Outdoor Sensor
Optional Remote Sensor
OIL BURNER
PRIMARY
NOTES
:
1. “Y2” & “R” connections at outdoor unit are only
required for 2-stage heat pumps
2. Remove the factory installted jumper at “BK” on the
indoor unit
3. Remove factory RC/RH jumper for systems
with seperate heating and cooling low voltage
transformers
4. ”BK” is not connected on non-Trane/American
Standard units
5. “Y1/Ylo” and/or “Y/Y2” must be connected at the
indoor unit on non-Trane/American Standard units
824 COMFORT CONTROL
12- 1 or 2 Stage Cooling w/Variable Speed Oil Furnace
INDOOR UNIT
OUTDOOR UNIT
3
5
5
2
