8
Unitary Products Group
FIGURE 7 : TYPICAL 1 PHASE FIELD WIRING (AIR HANDLER / ELECTRICAL HEAT)
FIGURE 8 : TYPICAL 3 PHASE FIELD WIRING (AIR HANDLER / ELECTRICAL HEAT)
GRD.
LUG
CONTACTOR
GRD.
SCREW
M
T1
L1
L2
OUTDOOR UNIT
THERMOSTAT
INDOOR UNIT
T2
POWER WIRING
208/230-1-60
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
W
DEFROST
CONTROL
R
C
R
W2
G
O
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
GRD.
LUG
CONTACTOR
GRD.
SCREW
M
OUTDOOR UNIT
INDOOR UNIT
POWER WIRING
208/230-3-60
460-3-60
POWER WIRING
ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
POWER
SUPPLY
208/230-3-60
460-3-60
T1
L1
L2
T2
T3
L3
