406905-UIM-C-1009
Johnson Controls Unitary Products
7
FIELD CONNECTIONS CONTROL WIRING
1.
Route low voltage wiring into bottom of field wiring box as shown
in Figure 6. Make low voltage wiring connections inside the low
voltage box per Figures 8 - 11.
2.
The complete connection diagram and schematic wiring label is
located on the inside surface of the unit service access panel.
3.
Replace the corner cover removed in Step 2.
4.
All field wiring to be in accordance with national electrical codes
(NEC) and/or local-city codes.
5.
Mount the thermostat about 5 ft. above the floor, where it will be
exposed to normal room air circulation. Do not place it on an out-
side wall or where it is exposed to the radiant effect from exposed
glass or appliances, drafts from outside doors or supply air grilles.
6.
Route the 24-volt control wiring (NEC Class 2) from the outdoor
unit to the indoor unit and thermostat.
FIGURE 5:
Outdoor Unit Field Wiring Control Box
High
Voltage
Wiring
Low
Voltage
Wiring
A Start Assist Kit is available for 1-phase units and is recommended
for long line set applications or in areas of known low voltage prob-
lems.
To eliminate erratic operation, seal the hole in the wall at the ther-
mostat with permagum or equivalent to prevent air drafts affecting
the operation of in the thermostat.
NOTICE
NOTICE
FIGURE 6:
Typical Field Wiring (Air Handler / Electrical Heat) (Single-Phase)
ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODES
POWER WIRING
208/230-1-60
CONTACTOR
TERMINALS
COIL
GND.
LUG
C
Y
R
G
W
Y
R
G
W
POWER WIRING
CONTROL WIRING
FACTORY WIRING
24 VOLT CONTROL WIRING
MINIMUM 18 GA. WIRE
(NEC CLASS 2)
FURNACE OR AIR HANDLER TERMINAL BLOCK
ROOM THERMOSTAT
CONDENSING UNIT
ALL OUTDOOR WIRING MUST BE WEATHERPROOF. USE COPPER CONDUCTORS ONLY.
TERMINAL W IS ONLY
REQUIRED ON SYSTEMS
WITH HEAT.
*
*
FIGURE 7:
Typical Field Wiring (Air Handler / Electrical Heat) (Three-Phase)
ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODES
POWER WIRING
CONTACTOR
TERMINALS
COIL
GND.
LUG
C
Y
R
G
W
Y
R
G
W
POWER WIRING
CONTROL WIRING
FACTORY WIRING
24 VOLT CONTROL WIRING
MINIMUM 18 GA. WIRE
(NEC CLASS 2)
FURNACE OR AIR HANDLER TERMINAL BLOCK
ROOM THERMOSTAT
CONDENSING UNIT
ALL OUTDOOR WIRING MUST BE WEATHERPROOF. USE COPPER CONDUCTORS ONLY.
TERMINAL W IS ONLY
REQUIRED ON SYSTEMS
WITH HEAT.
*
*
