Electrical Connection Of The Rasc Unit; Transmission Wiring Between Rasc And Indoor Unit - Hitachi RASC-HNPE CENTRIFUGAL VRF Series Installation And Operation Manual

Electrical and control settings

13.3 ELECTRICAL CONNECTION OF THE RASC UNIT

C A U T I O N
13.3.1 Wiring size
Model
RASC-4HNPE
RASC-5HNPE
RASC-6HNPE
RASC-8HNPE
RASC-10HNPE
N O T E
13.3.2 Minimum requirements of the protection devices
C A U T I O N
•
•
Main switch protection
Select the main switches in according to the next table:
Model
RASC-4HNPE
RASC-5HNPE
RASC-6HNPE
RASC-8HNPE
RASC-10HNPE
ELB: Earth leakage breaker; CB: Circuit breaker

13.4 TRANSMISSION WIRING BETWEEN RASC AND INDOOR UNIT

• The transmission is wired to terminals 1-2.
• The H-LINK II wiring system requires only two transmission
cables that connect the indoor unit and the RASC unit.
1 2
1 2
• Use twist pair wires (0.75 mm²) for operation wiring between
RASC unit and indoor unit.
35 PMML0319A rev.1 - 06/2015
Max. current
Power supply
3N~ 400V 50Hz
Power source
3N~ 400V 50Hz
Indoor unit
RASC unit
Power supply cable size
(A)
EN60 335-1
14.1 4 x 4.0mm
14.1 4 x 4.0mm
16.0 4 x 4.0mm
24.7 4 x 6.0mm
24.7 4 x 6.0mm
N O T E
•
•
•
Max. current
(A)
14.1
14.1
16.0
24.7
24.7
• The wiring must consist of 2-core wires (Do not use wire with
more than 3 cores).
• Use shielded wires for intermediate wiring to protect the
units from noise interference, with a length of less than
300m and a size in compliance with local codes.
•
rubber bushes to the panel with adhesive.
C A U T I O N
Transmitting cable size
EN60 335-1
2 + GND
2 + GND
2 + GND 2 x 0.75mm
2 + GND
2 + GND
CB ELB
(A) (no. poles/A/mA)
20
20
20 4/40/30
30
30
2