52
WIRING DIAGRAMS
HIGH VOL
T
A
G
E
!
DIS
C
ONNECT
AL
L
POW
E
R BEF
O
RE
SERVICI
NG OR IN
S
T
A
L
L
IN
G
T
H
IS
UNIT
.
M
U
L
T
IPL
E
PO
W
E
R SO
UR
CES M
A
Y BE P
R
ESEN
T
.
F
A
IL
URE
T
O
DO
SO
M
A
Y CAUS
E PRO
P
ERTY DAM
A
G
E
,
PERSO
NAL
I
N
J
U
R
Y
O
R
DE
A
T
H
.
OT18-60A OUTDOOR THERMOSTAT
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
1
2
Y
O
C
W1
G
R
E
R
Y
Y
R
G
O
O
G
W
BR
BL
BL
R
PACKAGE UNIT
LOW VOLTAGE
JUNCTION BOX
BL
W2
C
R
Y
O
W1
G
E
TYPICAL HP
ROOM THERMOSTAT
1
2
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. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
