Hitachi CENTRAL STATION PSC-A32MN Installations- Und Betriebshandbuch Seite 16

Electrical wiring
4 ELECTRICAL WIRING
The central station requires wiring work for the power supply, air conditioner and control wiring (H-LINK) cables.
1 2
1 2 1
Remote control switch
Type of wiring
Power supply cable
Earth wiring
H-LINK (Control wire)
Wiring for external input Input: Non-voltage normal open
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 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.
!
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. (Refer to other
documents such as the Technical Catalogue for the proper connection of power cables between indoor units).
• 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.
• Use an earth leakage breaker with medium sensitivity, and an activation speed of 0.1 or less. If this is not fitted, there is a risk of electric shock
and/or fire.
• Install an earth leakage breaker, fuse and circuit breaker for each outdoor unit power line. Not fitting it may cause an electric shock or fire.
• This model is a single phase unit (1~, AC 100-240V, 50/60Hz). Do not connect a three-phase power source. It may cause a failure.
8 PMML0332A rev.0 - 05/2015
Outdoor unit
transmission wires to
the TB terminals  and
1 2 1 2
 of the outdoor units
(Transmission wire)
2 1 2 1 2
Specification
AC100 ~ 240V
-
DC5V
Connect the
Terminal
board TB2
and the indoor units
H-LINK
1 2
Indoor unit
Length of wiring Cable specification
- 1.25 to 2 mm
-
≤1000 m 0.75 to 1.25 mm
≤300 m 0.5 to 1.25 mm
PSC-A32MN
PSC-A32MN
Terminal
Terminal
board TB3
board TB1
CN1 CN2 CN3
2 FG
1
Frame ground
terminal
Power supply
100 to 240V
Recommended cable model
600V CV, CCV, CEV (Hitachi Cable)
2
-
2
JKPEV-S, JKEV-S, CVV-S, CVV,
600V VCT (Hitachi Cable)
2
To outdoor unit or power
circuit breaker
Pull box
Indoor units
-