TYPICAL INSTALLATION
60” OVERHEAD CLEARANCE
10” CLEARANCE AROUND PERIMETER 
NOTES:
ALL OUTDOOR WIRING MUST BE WEATHERPROOF. MINIMUM 24” UNIT TO UNIT CLEARANCE.
MINIMUM 18” SERVICE ACCESS CLEARANCE 
ON ONE SIDE
WEATHERPROOF
DISCONNECT
SWITCH
CONTROL
ACCESS
PANEL
THERMOSTAT
NEC CLASS 1 WIRING
NEC CLASS 2 WIRING
TO FURNACE OR
AIR HANDLER
TERMINAL BLOCK
TO INDOOR COIL
SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT
TYPICAL FIELD WIRING
ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODES
THERMOSTAT
INDOOR UNIT
LOW VOLTAGE TERMINAL BLOCK 3,4 IN AIR HANDLER WITH ELECTRIC HEAT
OUTDOOR UNIT
DEFROST
CONTROL
R
B or C
Y
O
W
L or X
G
T2
E2
1FIELD INSTALLED JUMPER
R
C
Y
O
W2
G
W1
BK 
RED | R |
|
|
| CONTACTOR | ||
BLK |
| ||
C |
|
| |
|
|
| |
YEL | Y | T2 | T1 |
|
|
| |
ORG | O |
| M |
|
|
| |
WHT W | L2 | L1 | |
PUR X/L |
|
| |
BRN | W1/66 |
|
|
|
|
| |
GND.
SCREW
1JUMPER TERMINALS E AND W TO HEAT
ON FIRST STAGE DURING EMERGENCY HEAT.
2 TERMINAL NOT USED ON ALL THERMOSTATS.
POWER WIRING
24V CONTROL WIRING (NEC CLASS 2)
DEHUMIDIFICATION CONTROL CONNECTION (Humidistat* Jumper must be removed)
GND.
LUG
CIRCUIT
BREAKER***
POWER WIRING
3CHECK THE LOW VOLTAGE TERMINAL BLOCK ON THE INDOOR UNIT FOR THE ACTUAL ARRANGEMENT OF THE TERMINALS.
4CONNECT POWER WIRING TO TERMINAL BLOCK 3TB ON UNITS WITHOUT ELECTRIC HEAT OR CIRCUIT BREAKER.
Johnson Controls Unitary Products | 23 |