035-14519-002 Rev. B (1204)
Unitary Products Group
11
FIGURE 15:
Two-Stage Cooling Wiring
Y1
Y2
R
R
Y
G
W2
Y1
Y2
X
R
HUM
X
Y1
Y2
W1
O
C
G
W2
W1
C
C
Y2 OUT
DEHUMIDIFICATION CONTROL CONNECTION
(”HUMIDISTAT” JUMPER ON CFM SELECTION BOARD
MUST BE REMOVED)
INDOOR UNIT CFM
SELECTION BOARD
THERMOSTAT
(TWO STAGE COOLING
MUST BE USED)
INDOOR UNIT CFM
CONTROL BOARD
WIRE NUT
YEL
BRN
PUR
BRN
BRN
BLU
NOTE: THERMOSTAT TERMINAL “W1, W2” NOT USED FOR COOLING ONLY.
FIGURE 16:
Heat Pump Wiring
DEHUMIDIFICATION CONTROL CONNECTION
(”HUMIDISTAT” JUMPER MUST BE REMOVED)
ALL WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND/OR LOCAL CODES
INDOOR UNIT
LOW VOLTAGE TERMINAL BLOCK
IN AIR HANDLER WITH ELECTRIC HEAT
3,4
THERMOSTAT
OUTDOOR UNIT
DEFROST
CONTROL
GND.
SCREW
**TERMINAL NOT
AVAILABLE ON ALL
THERMOSTATS.
IMPORTANT NOTE:
HEAT PUMP JUMPER
ON THE CFM
SELECTION BOARD
MUST BE REMOVED
WHEN AIR HANDLER
IS USED WITH A HEAT
PUMP UNIT.
7 WIRES
CONTROL
BOARD
CFM SELECTOR
BOARD
CONTACTOR
T2
T1
L2
L1
M
POWER WIRING
208/230-1-60
230-1-50
CHECK THE LOW VOLTAGE TERMINAL BLOCK ON THE INDOOR UNIT FOR THE ACTUAL ARRANGEMENT OF THE TERMINALS.
CONNECT POWER WIRING TO TERMINAL BLOCK 3TB ON UNITS WITHOUT ELECTRIC HEAT OR CIRCUIT BREAKER.
3
4
POWER WIRING
24V CONTROL WIRING
(NEC CLASS 2)
JUMPER TERMINALS E AND W TO HEAT ON FIRST STAGE DURING EMERGENCY HEAT.
TERMINAL NOT USED ON ALL THERMOSTATS.
1
2
FIELD
INSTALLED
JUMPER
1
GND.
LUG
CIRCUIT
BREAKER***
WIRE NUT
OR SCREW
TERMINALS
O
R
W
G
Y
T
2
E
2
R
Y
G W2 W1 O
C
Y2 Y1 X Hum
O
X
R
C
W
Y
W1
L or X
B or C
FIELD
INSTALLED
JUMPER
RED
YEL
GRN
BRN
WHT
ORG
BLK
PUR
