Hitachi SET FREE MINI RAS-3 Manuel D'installation page 29

DSW6: Setting Conditions for piping length &
lift
The Outdoor Unit is located
higher than Indoor Unit
(0~25m)
The Outdoor Unit is located
lower than Indoor Unit
(0~20m)
The Outdoor Unit is located
lower than Indoor Unit
(20~25m)
14.3. COMMON WIRING

CAUTION:
All the field wiring and electrical components must
comply with local codes.
14.3.1. ELECTRICAL WIRING BETWEEN INDOOR
UNIT AND OUTDOOR UNIT
Connect the electrical wires between the indoor unit and
the outdoor unit, as shown below.
Follow local codes and regulations when performing
-
electrical wiring.
If the refrigerant piping and the control wiring are
-
connected to the units in the same refrigerant cycle.
Use twist pair wire (more than 0.75 mm²) for operation
-
wiring between outdoor unit and indoor unit, and
operation wiring between indoor unit and indoor unit.
Use 2-core wire for the operating line (Do not use wire
-
with more than 3 cores).
Use shielded wires for intermediate wiring to protect the
-
units from noise obstacle at length of less than 300 m
and size complied with local code.
(In case of RAS-3HP, RAS-4HP and RAS-5HP, Power Supply shall be connected to Outdoor Unit and Indoor Unit separately.)
(Max.4 units per refrigerant Cycle) 3FSVNE
(Max.6 units per refrigerant Cycle) 4FSVNE
(Max.7 units per refrigerant Cycle) 5FSVNE
Nº Description
No. 0 System Outdoor Unit

Operating Line (Twisted Shielded Pair Cable or Shielded Pair

Cable DC5V (Non-Pole Transmission, H-Link System).
Remote Control Switch

Indoor Units

≤
25 m length
<
Length 0~25m
50m
ON
ON
1 2 3
1 2 3
(before shipment)
ON ON
1 2 3 1 2 3
1. OFF: Piping length 0~25m
<
ON: Piping length 25~50m
2. OFF: Outdoor unit is higher than Indoor unit. 0~25m
ON: Outdoor unit is Lower than Indoor unit. 20~25m
Open a hole near the connection hole of power source
-
wiring when multiple outdoor units are connected from
one power source line.
The recommended breaker sizes are shown in Table of
-
electrical data and recommended Wiring, Breaker Size/1
O.U.
In the case that a conduit tube for field-wiring is not used,
-
fix rubber bushes with adhesive on the panel.
All the field wiring and equipment must comply with local
-
and international codes.

ATTENTION:
Pay attention to the connection of the operating line.
Incorrect connection may cause the failure of PCB.
TB
- Terminal Board.
CB
- Circuit Breaker.
ELB
- Earthleakage Breaker.
- Field Wiring.
- Field Supplied.
- Optional Accessory..
ELECTRICAL WIRING
(Max.4 units per refrigerant Cycle) 3FSVNE
(Max.6 units per refrigerant Cycle) 4FSVNE
(Max.7 units per refrigerant Cycle) 5FSVNE
14
21