GRD.
LUG
CONTACTOR
GRD.
SCREW
M
T1
L1
L2
OUTDOOR UNIT
THERMOSTAT
INDOOR UNIT
T2
POWER WIRING
208/230-1-60
230-1-50
POWER WIRING
24V CONTROL WIRING
(NEC CLASS 2)
CIRCUIT
Jumper terminals E and W to
heat on first stage during
Emergency Heat.
LOW VOLTAGE TERMINAL BLOCK
IN AIR HANDLER WITH ELECTRIC HEAT
Check the low voltage terminal block on the indoor unit for the actual arrangement of the terminals.
BREAKER***
ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
Connect power wiring to terminal block 3TB on units without electric heat or circuit breaker.
3,4
1
3
4
Terminal not used on all thermostats.
2
Y
W1 or 66
W
DEFROST
CONTROL
R
C
R
60 or W2
G
O
B or C
W1
Y
R
O
G
W
Y
7 WIRES
RED
B or C
L or X
T
E
FIELD
INSTALLED
JUMPER
1
2
2
BLK
YEL
ORG
WHT
BRN
PRP
X
O
FIGURE 8 -
TYPICAL LOW VOLTAGE FIELD WIRING
—
SINGLE PHASE
— 10, 12, & 14 SEER HEAT PUMPS MODELS
AIR HANDLERS / ELECTRIC HEAT
Y
O
W 1 or 66
W
GRD.
LU G
DEFROST
CONTROL
CONTACTOR
GRD.
SCREW
M
RR
60 or W 2
G
O
B or C
W1
Y
R
O
G
W
Y
7 W IR E S
OUTDOOR UNIT
THERM OSTAT
IN D O O R U N IT
POW ER W IRING
208/230-3-60
460-3-60
POW ER W IRING
24V CONTROL W IRING
(NEC CLASS 2)
LOW VOLTAGE TERM INAL BLO CK
3,4
IN AIR HANDLER W ITH ELECTRIC HEAT
3
C heck the low voltage term inal block on the indoor unit for
the actual arrangem ent of the term inals.
ALL W IRING TO BE IN ACCORDANCE W ITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
RED
POW ER
SUPPLY
208/230-3-60
460-3-60
B or C
L or X
Jum per term inals E and W to
heat on first stage during
Em ergency H eat.
Term inal not used on
all therm ostats.
T
E
FIELD
IN STA LLED
JUM PER
1
1
2
2
2
BLK
YEL
ORG
WHT
BRN
PRP
T1
L1
L2
T2T3
L3
C
X
4
C onnect pow er w iring to term inal block 3TB on units
w ithout electric heat or circuit breaker.
FIGURE 9 -
TYPICAL LOW VOLTAGE FIELD WIRING
—
THREE PHASE
— 10 SEER HEAT PUMPS MODELS
AIR HANDLER/ELECTRIC HEAT
515.16-N3Y
8 Unitary Products Group
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