Service Manual

53
W IRING DIAGRAM S
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
OT18-60A OUTDOOR THERM OSTAT
BLUE
WHITE
ORANGE
GREEN
YELLOW
RED
SEE NOTE 1
#18 GAUGE 7 WIRE
REQUIRED FOR
HEAT PUMPS
PACKAGE SYSTEM WIRING DIAGRAM - 1 STAGE ELECTRIC HEAT
TYPICAL HP
ROOM THERMOSTAT
OUTDOOR THERMOSTAT
CLOSE ON TEMPERATURE FALL
12
YO
CW1G
R
E
R
Y
Y
R
G
O
O
G
W
BR
BL
BL
R
PACKAGE UNIT
LOW VOLTAGE
JUNCTION BOX
BL
W2 C RYO W1G E
TYPICAL HP
ROOM THERMOSTAT
12
OUTDOOR THERMOSTAT
CLOSE ON TEMPERATURE FALL
PACKAGE UNIT
LOW VOLTAGE
JUNCTION BOX
BLUE
BROWN
WHITE
ORANGE
GREEN
YELLOW
RED
SEE NOTE 1
#18 GAUGE 8 WIRE
FOR HEAT PUMPS
PACKAGE SYSTEM WIRING DIAGRAM - 2 STAGE ELECTRIC HEAT
ABOVE 10 KW
SEE NOTE 2
R
Y
G
O
O
Y
G
R
BL
BL
BR
R
W
BR
W
NOTES:
1) "O" and "E" used on heat pumps only.
2) Connect wire from terminal #1 on outdoor thermostat to the white
wire on package units if single stage indoor thermostat is used.
Color Codes
R - Red
Y - Yellow
BL - Blue
BR - Brown
O - Orange
W - White
G - Green
Wiring is subject to change. Alw ays refer to the wiring diagram on the unit for the most up-to-dat e wiring.