18
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING.
MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
WARNING
NOTES:
1) OUTDOOR THERMOSTAT (OT-1) SHOULD BE THE
FIRST TO CLOSE AND THE LAST TO OPEN.
2) JUMPER W1 AND W2 TOGETHER IF OT-2 IS NOT
USED.
3) REMOVE WIRE WHEN USING OUTDOOR THERMO-
STAT.
NOMENCLATURE:
OT - OUTDOOR THERMOSTAT (OPTIONAL)
EHR - EMERGENCY HEAT RELAY (OPTIONAL)
COLOR CODES
RD - RED
YL - YELLOW
BL - BLUE
BR - BROWN
OR - ORANGE
WH - WHITE
Y
G
W
W2
R
COOLING UNIT WITH OPTIONAL HEAT KITS OF 15 kW AND ABOVE
AND ROOM THERMOSTAT WITH TWO STAGES OF HEAT
C
W1
W2
Y2
Y1
O
G
R
TB
YL
BL
CONDENSING UNIT
24V CONNECTION
BL
YL
GR
RD
#18 GA. 5 WIRES WITH COOLING
4 WIRES WITHOUT
WH
YL
BR
BR
BR
YL
G
C
R
HEAT PUMP UNIT WITH OPTIONAL HEAT KITS OF 10 kW AND BELOW
C
W1
W2
Y2
Y1
O
G
R
TB
#18 GA. 7 WIRE
O
Y
C
W2
R
Y
O
W2
E
RD
BR
GR
BR
BL
WH
OR
YL
YL
YL
YL
RD
BL
WH
WH
OR
BL BL
WH
ASPT UNIT
ASUF UNIT
ASPT UNIT
ASUF UNIT