Electrical Wiring - Hitachi PC-ARF Technical Catalogue

5 Centralised remote controls
PSC-A64GT
4 Fix the switch box (Field-supplied: JIS Switch Box for 4
Switches (with cover) (JIS C8340) by accessory fixing
screw (M4 x 16 mm).

5.1.3 Electrical wiring

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Electrical wiring connection
The central station requires wiring work for the power supply, air conditioner and control wiring (H-LINK) cables.
Outdoor unit
1 2 1 2
1 2 1 2
Remote control switch
Type of wiring
Power supply cable
Earth wiring
H-LINK (Control Wire)
Wiring for external Input: Non-voltage normal open
input and output
N O T E
• The central station may be damaged because of incorrect wiring.
• Transmission wires shall be separated from the power supply wiring and other electrical device wiring. Keep a separation of at least
30 cm between transmission wiring and the power supply wiring. If it is not possible to secure this space, then route the power supply
wiring and transmission wiring through separate metal conduit tubes. One end of the metal conduit tubes shall be earthed for noise
reduction.
• Do not connect the power supply wiring to the terminals for transmission of central station. However, if the power supply wires are
connected incorrectly, the fuse of the printed circuit board will blow out for protection. In such a case, turn ON pin 2 of DSW2 on the
printed circuit board to allow emergency operation without the fuse.
• Always remove the earth wiring of "FG" terminal when performing insulation capacity test or withstand voltage test. Failure to do so
may result in damage to the central station.
• Remove the earth wiring of "FG" terminal securely when the insulating capacity test or the withstand voltage test is performed. If the
above is not secured, it may cause of breaking down of the central station.
224
TCGB0106 rev.0 - 12/2014
Connect the transmission
wires to the TB terminals
1 2
 and  of the outdoor
units and the indoor units.
H-LINK
(Transmission wire)
Indoor unit
1 2 1 2
To TB2
of central
station
Specification
AC100~240V
DC5V
Output: DC12V, ≤75mA
M4 screws
(Q'ty: 4)
PSC-A64GT
Terminal
Terminal
board TB3
board TB2
1 2 1 2 3 4 5 6
Length of Cable specifica-
wiring tion
-
1.25 to 2.0 mm2
≤1000m
0.75 to 1.25 mm2
≤70m
0.75 to 1.25 mm2
Switch box
(Field-supplied)
(JIS C8340 4 switches (with cover))
Terminal
board TB1
2 FG
1
Frame ground
terminal
Power supply
100 to 240V
Recommended cable model
600V CV, CCV, CEV (Hitachi Cable)
Twist pair cable with shield > 0.75
mm2 (Equivalent to KPEV-S)
JKPEV-S, JKEV-S, CVV-S, CVV,
600V VCT (Hitachi Cable)