3
3
(1) Connect the power supply wirings to the terminal block TB1 and ground wiring to the terminal in the
electrical control box. The ELB (Earth leakage breaker), FUSE and S (Main switch) must be installed to each
power source of outdoor unit.
(2) Connect the transmission cables between the outdoor unit and indoor units to the terminals 1 and 2 on
the terminal block. The transmission cables must be made from the shielded twist pair cabling. Proper bonding
and termination of the cable shield is required as per guidelines. The installation must be considered per
application and local code requirements. Transmission cable shall be a minimum of 0.75mm
2
, 2-Conductor,
Stranded Copper.
(3) For the model of RAS-3.0~7.0HNSKQ outdoor units, the magnetic rings in the package of the
outdoor unit should be used on the power supply wire
、
transmission cable and ground wire.
(4) Connect the transmission cables between the indoor unit and wired controller to the terminals A and B
on the terminal block.
(5) The transmission cable should be separated from the power supply wiring.
Keep at least 5cm distance between the transmission cable and the power supply wiring, and also min.
1.5m distance between the transmission cable and power supply wiring for other electrical devices. If it is not
secured, put the power supply wiring into the metal conduit tube to separate from other wirings.
(6) Do not connect the power supply wiring to the terminals 1 and 2 on the terminal block for transmission
wiring. Otherwise, printed circuit board may be damaged.
(7) Connect the ground wire for the outdoor/indoor units. The ground wiring work under the condition of
100Ω (max.) ground resistance should be performed by the qualified person.
(8) Tighten screws for the terminal block according to the following table:
Size
Tightening Torque
M4
1.0~1.3 N·m
M5
2.0~2.5 N·m
M6
4.0~5.0 N·m
M8
9.0~11.0 N·m
M10
18.0~23.0 N·m
◆
◆
◆
◆
The ELB (Earth leakage breaker), FUSE and S (Main switch) must be installed to each power source of
outdoor unit and indoor units. If not, it may cause of an electrical shock or fire.
Perform the electrical work according to the regulations of each region and this installation and
maintenance manual. A separate, dedicated electrical circuit must be used. If the electrical wiring work is
performed incorrectly or there is a capacity shortage of the power circuit, it will cause an electric shock or
fire.
Check that the ground wire is securely connected. Otherwise, it may lead to an electrical shock. Do not
connect the ground wiring to gas piping, water piping, lightning conductor, or telephone ground wirings.