Position Of Electrical Wiring Connection - Hitachi RPC-2.0FSR Installation & Maintenance Manual

7.3 Position of Electrical Wiring Connection
● Tightly secure wirings to the terminal
block according to the specified torque. If
tightening the terminals is not completed,
heat generation, an electric shock or a fire
will occur at the terminal connection.
● Make sure that the wires are securely fixed
in order not to apply an external force to the
terminal connection of the wirings. If fixing is
not completed, heat generation or a fire will
occur.
• The electrical wiring connection for the indoor
unit is shown in the item 7.2.2.
• The connection at the terminal block for the
indoor unit is shown in the figure below. Check
the outdoor unit for the combination before the
wiring work. The screws at the terminal block
should be performed according to the tightening
torque as shown in the table below.
Tightening Torque for Terminals
Tightening Torque
M4 1.0 - 1.3 (N-m)
Terminal Block for
Power Source Cable
TB1 (black)
-
R/L1 S/N
A10762300A-rev.1
Terminal Block for
Control Cable
TB2 (white)
A B 1 2
● Do not connect the main power source cables to
the control line (Terminals A, B, 1 and 2 of TB2).
If connected, the printed circuit board (PCB) will
be broken.
● Pay attention to followings when wires are
connected to terminal block.
(A) Attach an insulation tape or a sleeve to each
terminal.
(B) Maintain the distance between the electrical
box and the terminals to prevent a short
circuit.
(C) Maintain the distance between the terminals.
(B)
(1) Connect the cable for the optional wired
controller or the optional extension cable
to the terminals inside the electrical box
through the connecting hole in the cabinet.
(2) Connect the power supply and the earth
wires to the terminals in the electrical box.
(3) Connect the wires between the indoor unit
and the outdoor unit to the terminals in the
electrical box.
(4) Connect cables correctly to match the
terminal No. and the mark band.
(5) Connect the transition wires between indoor
units connected to the same outdoor unit.
(6) Do not connect the main power source
cables to the control line (Terminals A, B,
1 and 2 of TB2). If connected, the printed
circuit board (PCB) will be broken.
(7) Tightly clamp the wires using the cord clamp
inside the electrical box.
(8) Standard compliance when installing the unit
in Australia.
(a) Connect the both ends of shielded twist
pair cable (controller cable and control
cable) to the earth as shown bellow.
Shielded Twist Pair Cable
Earth
(b) A lockable isolator shall be mounted
adjacent to but not on the unit and will
disconnect all active conductors to the unit
from the supply circuit.
(C)
Screw
(A)
Wires
Shield
Earth
29