Hitachi RAS-8.0HNBRMQ1 - Page 40

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INSTALLATION
Table 4.1 Recommended Electrical Characteristics
Model Power Supply
Maximum
Running
Ampacity
(A)
Power Supply
Wiring
(Cores×mm
2
)
Transmission
cable
(Cores×mm
2
)
ELB
Rated
Ampacity
(A)
Rated Sensitive
Ampacity
(mA)
RAS-3.0~3.5
HNBRKQ1
220-240V/1Ph/50Hz 21 3×4.0 2×0.75 32 30
RAS-4.0~6.5
HNBRKQ1
220-240V/1Ph/50Hz 31 3×6.0 2×0.75 40 30
RAS-7.0~8.0
HNBRMQ1
380-415V/3Ph/50Hz 20 5×6.0 2×0.75 25 30
RAS-10~12
HNBRMQ1
380-415V/3Ph/50Hz 28 5×6.0 2×0.75 40 30
(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-3.0~6.5HNBRKQ1 outdoor units, the magnetic rings in the package of the outdoor
unit should be used on the power supply wire and transmission cable. For the power supply wire, two
magnetic rings should be paralleled and the wire should through them by one cycle. For the transmission
cable between the outdoor unit and indoor units, the cable should be through the magnetic ring by 3
cycles.
(4) Connect the transmission cables between the indoor unit and wireless controller to the terminals A and B
on the terminal block.
(5) The transmission cable is required to 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 device. If the above
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 qualied 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