OUTDOOR UNITS
TC-16001-rev.5
2-43
2.15.2 Electrical Wiring Method
Connect the electrical wiring according to the following gure:
(1) Connect the power supply wirings to L1 and L2 for the power source on the terminal block TB1 and
ground wiring to the terminal in the electrical control box.
(2) Connect the communication cables between the outdoor unit and indoor units to the terminals
1 and 2 on the terminal block TB1. When shielded cabling is applied (M4), proper bonding and
termination of the cable shield is required as per Johnson Controls guidelines. Plenum and riser
ratings for communication cables must be considered per application and local code requirements.
Communication cable shall be a minimum of AWG18 (0.82mm
2
), 2-Conductor, Stranded Copper.
(3) Insert the communication cables into the PVC tube “VW-1 600V” (accessory) to separate from the
power supply wirings and the communication cables in the outdoor unit.
Then, tighten both ends of the PVC tubing with the cable bands (accessory) in order to secure the
PVC tubing to the communication cables.
(4) Tighten screws for the terminal block according to the following table.
< Required Tightening Torque >
Size Tightening Torque
M4 0.7 to 1.0 ft∙lbs (1.0 to 1.3 N∙m)
M5 1.5 to 1.8 ft∙lbs (2.0 to 2.4 N∙m)
M6 3.0 to 3.7 ft∙lbs (4.0 to 5.0 N∙m)
M8 6.6 to 8.1 ft∙lbs (9.0 to 11.0 N∙m)
M10 13.3 to 17.0 ft∙lbs (18.0 to 23.0 N∙m)
For Power Supply Wiring or
Communication Cable
1-1/8 (Conduit Hole)
Communication Cable
with PVC Tube (Accessory)
Power Supply Wiring
and Ground Wiring
1. Insert the wirings into
the cord clamp and
clamp them as shown
in the figure.
2. Perform wiring so
that wires do not touch
the compressor, refrigerant
pipes or edge of the covers.
Wiring Method with Clamp
Insert the power supply wiring,
the ground wiring and
the communication cable into here.
Tape or
Sleeve
12
N
Power
Supply
Wirings
L1
Ground
Wiring
Terminal
Ground
Wiring
Communication
Cables
Attach
insulation
sleeve
Terminal
Block (TB1)
L2 12
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