Hitachi RAC-112SQB, Руководство по установке

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13
4. Wiring
(1) Electrical work
Ask a qualified agent (electrician) to carry out electrical work with reference to national electrical regulations.
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1) Wiring with 1 Φ 230VAC. Select wire gauge according to the following guidelines. There are two ways of wiring:
1. From the outdoor unit (Method B).
2. Individual power supply for the indoor and outdoor units (Method C).
From the outdoor unit (Method B)
Individual power supply for the indoor and outdoor units (Method C)
Single phase:
Precautions
y Follow the instructions in the installation manual of the indoor unit when wiring is different.
y Connect the operation circuit of the outdoor unit and indoor unit with 0.75-1.25mm 2 , 2C (type: VCTF, VCT, CVV,
MVVS, CVVS, VVR, VVF) or 2C stranded (type: KPEV, KPEV-S equivalent). Also, wire length must be under 1,000m.
y Wires other than the 2C and 2C stranded wires mentioned above can be used in H-LINK systems and wiring under 100m.
y Connect the wired remote control and the operation circuit of the indoor unit with 2C stranded wires (type: KPEV,
KPEV-S equivalent). Also, wire length must be under 500m. Wires (0.3mm
2 ) other than double stranded wires can also
be used for wire length under 30m.
y
When shielded wires (type: MVVS, CVVS, KPEV-S) are used for connecting the operation circuit of the indoor and
outdoor units, earth with shielded wires.
Precautions for H-LINK system connection
y The factory setting of unit terminal impedance (DSW5-1: ON) is shown on the right diagram.
When more than two outdoor units are connected to the H-LINK, disabled the terminal
impedance (DSW5-1: OFF) from the second outdoor unit onward
. Make sure that the
terminal impedance of only one outdoor unit in the H-LINK is ON. When there is only one
outdoor unit, do not change the factory setting.
y
Use the same type of cables for all units on the H-LINK.
Located on the mainboard
of the outdoor unit.
● Precautions for Indoor and Outdoor Units Wiring (Methods
※
Insulation materials for pipe should resist the heat from
the pipe.
Gas refrigerant pipe
Fluid refrigerant pipe
Power circuit cable
between the indoor
and outdoor units.
Operation circuit cable
between the indoor and
outdoor units.
Factory
Setting:
DSW5-1:
ON.
B and C)
When connecting the outdoor unit and the indoor unit, the
distance between the operation circuit of the outdoor unit and the
230V power line should at least be 5-6cm. Therefore, do not use
co-axi
a l cables. Also, when the power source of the A/C and
other machines is in parallel, keep at distance of at least 1m.
When it is unable to separate them, wire the power line wire
inside a metal conduit (earthed on one end) to separate them.