Position Of Electrical Wiring Connection - Johnson Controls (H,Y,C)IDM012B21S Installation And Maintenance Manual

8.3

Position of Electrical Wiring Connection

• The electrical wiring connection for the indoor unit is shown in Section 8.2.2.
• The connection at the terminal block for the indoor unit is shown below. Check the outdoor unit for the
combination before the wiring work begins. Screw fasteners at the terminal block should be tightened
according to recommended torque specifications as shown in the table below.
Torque Specifications for Terminals
Screw Size
TB1 M4
TB2 M3.5
Terminal Block for Power Supply Wiring
TB1
L1
● Do not connect the main power supply wiring to the communication
line (Terminals A, B, 1 and 2 of TB2). If these are connected, the
printed circuit board (PCB) will be destroyed.
● Note the following for wire connections at TB1 and TB2:
(A) Attach a piece of insulation tape or sleeve at each terminal.
(B) Maintain a safe distance between the electrical box and the
terminals to prevent a short circuit.
(C) Maintain a safe distance between the terminals.
P00792Q-rev.2
Torque Specification
0.7 - 1.0 ft·lbs
(1.0 - 1.3 N·m)
0.9 ft·lbs
(1.2 N·m)
Terminal Block for Communication Cable
L2
NOTICE
TB2
1 2 A B
(B)
(C)
Screw
(A)
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