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12
IO-230F 08/04
C
W2
O Y R
Y O C G R E
W2
TYPICAL H/P
ROOM THERMOSTAT
HEAT PUMP
AR/ARUF/ARPF/ARPT
18-60
10 KW & BELOW
(OPTIONAL)
OUTDOOR THERMOSTAT
CLOSE ON TEMPERATURE FALL
RED
GREEN
WHITE
BLUE
AR UNIT
R
Y
O
W
BL
#18 GA. 5 WIRE
#18 GA. 7 WIRE
SEE
NOTE
#3
R
G
BR
W
BL
R
E
D
Y
E
L
L
O
W
O
R
A
N
G
E
W
H
I
T
E
B
L
U
E
#18 GA. 6 WIRE NEEDED WHEN OT IS USED
O
R
A
N
G
E
Y
E
L
L
O
W
#18 GA. 7 WIRE NEEDED WHEN TWO OT'S ARE USED
#18 GA. 5 WIRE
BL
O
W
Y
BL
SEE
NOTE
#3
W
G
BLUE
WHITE
GREEN
TYPICAL H/P
ROOM THERMOSTAT
AR/ARUF/ARPF/ARPT
18-60
ABOVE 10 KW
HEAT PUMP
B
L
U
E
W
H
I
T
E
C
W2
R
E
D
YO R
R
Y CO
W2
#18 GA. 7 WIRE
RG E
R
AR UNIT
RED
OT-1
OT-2
3
EHR
1
2
4
BROWN
SEE
NOTE
#2
NOTES:
1) OUTDOOR THERMOSTAT (OT-1) SHOULD BE THE
FIRST TO CLOSE AND THE LAST TO OPEN.
2) CONNECT WHITE AND BROWN WIRES FROM AIR-
HANDLER TOGETHER IF OT-2 IS NOT USED.
3) REMOVE WIRE WHEN USING OUTDOOR THERMOSTAT
NOMENCLATURE
OT ---OUTDOOR THERMOSTAT (OPTIONAL)
EHR -EMERGENCY HEAT RELAY (OPTIONAL)
COLOR CODES
R --RED
Y --YELLOW
BL-BLUE
BR-BROWN
O --ORANGE
W -WHITE
G --GREEN
(OPTIONAL)
OUTDOOR THERMOSTAT
CLOSE ON TEMPERATURE FALL
BR
R
G
BL
W
G
R
BL
BR
FIGURE 12
FIGURE 13
Important: If outdoor thermostat is not used, tie white and brown wires from Air Handler together