Hitachi AIR CORE 700 PPIM-B18UFA1DQ Manuel D'utilisation, D'installation Et D'entretien page 28

7. Electrical Wiring
1. The electrical wiring connection at the terminal block for the indoor unit is shown in the figure below.
Check the outdoor unit for the combination before starting the wiring work.
Outdoor Unit
TB2
NOTES:
(1) Terminals TB2 is installed on the main board. Each connection hole can be connected to one or
two 20AWG transmission wires. Generally, each connection hole is connected to one wire, and is
connected to two wires only when the center controller is connected.
(2) Connect the control cables between the indoor unit and the outdoor unit correctly.
(3) Use the shielded twist pair cable for control between the outdoor unit and the indoor units. They
are connected to the terminals 1 and 2 of the terminal blocks(TB2) on the PCB. The Wired remote
controller cable is connected to the terminals A and B of terminal block (TB2) on the PCB.
(4) Check to ensure that the shielded twist pair cable(20AWG) with total length of less than 3280ft(1000m)
and size complying with local code are used for intermediate wiring between the outdoor unit and
the indoor units to prevent noise obstacle.
(5) When the standard wire is used for field-wiring connection, the M4 and M5 crimping terminal
should be used. When a single wire is used, make it into the shape as shown in the figure below
and connect it to tighten the washer uniformly. The screws at the terminal block should be rotated
according to the tightening torque as shown in the table below:
Connect it with the
crimping terminal
Standard Wire
2. Connect the cable for the wired remote controller or the optional extension cable to the terminals
inside the electric box through the connecting hole on the control box.
3. Connect the power cables and grounding cables to the terminals in the electric box.
4. Connect the wires between the indoor and outdoor units to the terminal in the electric box.
5. Connect cables correctly to match the terminal numbers with the mark band numbers.
6. Wireless infrared receiver connection:
Outdoor unit
Power terminal block(TB3)
L1 N2
Terminal1(TB2) on the main board
Indoor Unit
Transmission
(Transmission)
1 2
1 2
Transmission cable
Connect it directly
as shown below
Single Wire
Indoor
unit
Main
A B
board
Wireless
infrared
receiver
Terminal(TB2)
A B 1 2
Field wiring side
L2
L1
R,S,C
A B
Power Supply (208/230V/1Ph/60Hz)
Tightening torque for terminals
Size
Power source M4
Earth connection M5
Wired remote controller connection:
Outdoor unit
-16-
Tightening torque
0.7 to 1.0 lbf.ft (1.0-1.3 N·m)
1.5 to 1.8 lbf.ft (2.0 to 2.5 N·m)
Indoor
unit
Main
A B
board
Wired
remote
controller