Outdoor Unit Control Box - Single Phase; Outdoor Unit Control Box - Three Phase; Electrical Connections; Field Connections Power Wiring - York THGD Series Installation Manual

Refrigerant charging should only be carried out by a qualified air con-
ditioning contractor.
Compressor damage will occur if system is improperly charged. On
new system installations, charge system per tabular data sheet for
the matched coil and follow guidelines in this instruction.
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.
SECTION VIII: 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.
Defrost
Control
Board
Low
Voltage
Box
"Fingered"
Bushing
Reversible High
Voltage Conduit Plate
FIGURE 6: Outdoor Unit Control Box - Single Phase
FIELD CONNECTIONS CONTROL WIRING
1. Route low voltage wiring into bottom of control box as shown in Fig-
ures 6 or 7. Make low voltage wiring connections inside the low volt-
age 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 control box 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.
Johnson Controls Unitary Products
Contactor
Start
Relay
(Optional)
Dual
Run/Fan
Capacitor
Start Capacitor
Ground
(Optional)
Lug
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.
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.
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 from the control box cover 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 Figures 6 or 7.
5. Install the proper size time-delay fuses or circuit breaker, and make
the power supply connections.
Defrost
Control
Board
Fan
Relay
Low
Voltage
Box
"Fingered"
Bushing
Reversible High
Voltage Conduit Plate
FIGURE 7: Outdoor Unit Control Box - Three Phase
6. Route the 24-volt control wiring (NEC Class 2) from the outdoor unit
to the indoor unit and thermostat.
NOTICE
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.
A Start Assist Kit is available and recommended for long line set
applications or in areas of known low voltage problems.
835961-UIM-D-0213
Contactor
Fan
Ground
Capacitor
Lug
7