Johnson Controls Unitary Products
9
445073-LTG-A-0109
TYPICAL INSTALLATION
TYPICAL FIELD WIRING
THERMOSTAT
SEAL OPENING(S) WITH
PERMAGUM OR EQUIVALENT
TO INDOOR COIL
TO FURNACE OR
AIR HANDLER
TERMINAL BLOCK
NEC CLASS 2 WIRING
NEC CLASS 1 WIRING
ALL OUTDOOR WIRING
MUST BE WEATHERPROOF.
CONTROL
ACCESS
PANEL
WEATHERPROOF
DISCONNECT
SWITCH
MINIMUM 24” SERVICE
ACCESS CLEARANCE
ON ONE SIDE
48” OVERHEAD
CLEARANCE
10” CLEARANCE
AROUND PERIMETER
NOTE:
THERMOSTAT
INDOOR UNIT
OUTDOOR UNIT
LOW VOLTAGE TERMINAL BLOCK
IN AIR HANDLER WITH ELECTRIC HEAT
DEFROST
CONTROL
FIELD
INSTALLED
JUMPER
DEHUMIDIFICATION CONTROL CONNECTION
(Humidistat* Jumper must be removed)
GND.
SCREW
CONTACTOR
T2
T1
L2
L1
M
R
L or X
Y
O
W
G
T
2
E
2
R
R
Y
Y
O
O
W2
W
W1
C
C
X/L
G
W1
BK
GND.
LUG
CIRCUIT
BREAKER***
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.
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.
B or C
ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODES
RED
BLK
YEL
ORG
BRN
PUR
WHT
CC
GRY
/66
GRAY FOR USE WITH OPTIONAL OUTDOOR THERMOSTAT KITS.
5
1
2
3
4
5
1
3,4