Electrical Wiring - Hitachi PC-ARF Technical Catalogue

5 Centralised remote controls
PSC-A32MN

5.2.3 Electrical wiring

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
Remote control switch
Type of wiring
Power supply cable AC100 ~ 240V
Earth wiring -
H-LINK(Control wire) DC5V
Input:
Wiring for external in-
normal open
put and output
Output: DC12V,
75mA>
N O T E
• In case that a specified wire length is mentioned for the external input of transmission side, use either [1] the specified wire length of
transmission side or [2] 300 m, whichever is shorter.
• The central station may be damaged because of incorrect wiring.
• The controller may be damaged in case of performing wiring work with the main power turned ON.
Turn OFF the main power of the air conditioner and the controller before performing any wiring work.
• 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 sup-
ply 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.
C A U T I O N
When using an AC200V to 240V power supply.
• In case of using a 200V~240V power supply, diverge the main power supply cables by using a pull box as shown in the figure.
• The electricity supply to the unit should be via an exclusive power control switch and protective circuit breaker, certified and installed
in accordance with local or national safety regulations.
296
TCGB0106 rev.0 - 12/2014
Connect the transmission
wires to the TB terminals
1 2 1 2
 and  of the outdoor
units and the indoor units.
(Transmission wire)
2 1 2 1 2
Specification Length of wiring
-
-
≤1000 m
Non-voltage
≤300 m
Pull box
PSC-A32MN
PSC-A32MN
Terminal
board TB2
H-LINK
CN1
1 2
Indoor unit
Cable specification
1.25 to 2 mm
2
-
0.75 to 1.25 mm
2
0.5 to 1.25 mm
2
To outdoor unit or power
circuit breaker
Indoor units
Terminal
Terminal
board TB3
board TB1
CN2 CN3
2 FG
1
Frame ground
terminal
Power supply
100 to 240V
Recommended cable model
600V CV, CCV, CEV (Hitachi Cable)
-
JKPEV-S, JKEV-S,
CVV-S, CVV, 600V VCT
(Hitachi Cable)