830867-BIM-B-0412
Johnson Controls Unitary Products
5
10. Check for leaks.
a. After the line set connections have been made they should be
checked for leaks.
b. If the valves were kept clean and lubricated per instruction no
leaks should be found.
c. Use leak detect solution or soap solution for leak testing. An elec-
tronic leak detector is recommended.
SECTION IV: ELECTRICAL CONNECTIONS
GENERAL INFORMATION & GROUNDING
Check the electrical supply to be sure that it meets the values specified
on the unit nameplate and wiring label.
Power wiring, control (low voltage) wiring, disconnect switches and over
current protection must be supplied by the installer. Wire size should be
sized per NEC requirements.
The complete connection diagram and schematic wiring label is located
on the inside surface of the unit service access panel.
FIELD CONNECTIONS POWER WIRING
1. Install the proper size weatherproof disconnect switch outdoors and
within sight of the unit.
2. Remove the screws at the top and sides of the corner cover. Slide
corner cover down and remove from unit.
3. Run power wiring from the disconnect switch to the unit.
4. Route wires from disconnect through power wiring opening provided
and into the unit control box as shown in Figure 7.
5. Install the proper size time-delay fuses or circuit breaker, and make
the power supply connections.
FIELD CONNECTIONS CONTROL WIRING
1. Route low voltage wiring into bottom of control box as shown in Fig-
ure 7. Make low voltage wiring connections inside the low voltage
box per Figures 8 & 9.
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 outside
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.
IT IS UNLAWFUL TO KNOWINGLY VENT, RELEASE OR DIS-
CHARGE REFRIGERANT INTO THE OPEN AIR DURING REPAIR,
SERVICE, MAINTENANCE OR THE FINAL DISPOSAL OF THIS
UNIT.
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND THE
OWNER HAS BEEN FULLY INSTRUCTED, SECURE THE
OWNER’S APPROVAL.
All field wiring must USE COPPER CONDUCTORS ONLY and be in
accordance with Local, National, Fire, Safety & Electrical Codes. This
unit must be grounded with a separate ground wire in accordance
with the above codes.
FIGURE 7:
Outdoor Unit Control Box
GROUND
LUG
“FINGERED”
BUSHING
LOW
VOLTAGE
BOX
REVERSIBLE HIGH
VOLTAGE CONDUIT PLATE
DUAL
RUN/FAN
CAPACITOR
CONTACTOR
A Start Assist Kit is available and recommended for long line set
applications or in areas of known low voltage problems.
To eliminate erratic operation, seal the hole in the wall at the thermo-
stat with permagum or equivalent to prevent air drafts affecting the
operation of in the thermostat.
FIGURE 8:
Typical Furnace Thermostat Wiring
NOTICE
NOTICE
1
VARIABLE
SPEED
FURNACE
C
Y
R
W
HUMIDISTAT CONTACTS OPEN ON HUMIDITY RISE.
HUMIDISTAT JUMPER ON CFM SELECTION BOARD
MUST BE REMOVED.
G
C
Y
R
O
Y1
W2
W1
G
HUM
Y2
X/L
1
THERMOSTAT
AIR
CONDITIONER
CONTACTOR
COIL
CONTACTOR
COIL
