System Wiring Diagram - Hitachi RASC-4HNPE Instruction Manual

ELECTRICaL WIRING
3 Harmonics situation of each model regarding IEC 61000-3-2
and IEC 61000-3-12 is as follows:
MODELS SITUATION REGARDING
IEC 61000-3-2 AND
IEC 61000-3-12 Ssc "xx"
Equipment complying with IEC
61000-3-12 (professional use)
This equipment complies with IEC
61000-3-12 provided that the short-
circuit power Ssc is greater than or
equal to xx (see Ssc column) at the
interface point between the user's
supply and the public system. It is
the responsibility of the installer or
user of the equipment to ensure,
by consultation with the distribution
network operator if necessary, that the
equipment is connected only to a supply
with a short-circuit power Ssc greater
than or equal to xx (see Ssc column)
4 Check to ensure that the power supply voltage is within +/-
10% of the rated voltage.
5 Check to ensure that power supply has an impedance low
enough to warranty not reduce the starting voltage more
than 85% of the rated voltage.
6 Check to ensure that the ground wire is connected.
7 Connect a fuse of specified capacity.

10.1 SYSTEM WIRING DIAGRAM

Connect the units (outdoor and indoor unit) according to the
following electric diagram:
• Connect the operation wiring to the units in the same
refrigerant cycle (The refrigerant piping and the control
wiring should be connected to the same indoor units). If the
refrigerant piping and the control wiring are connected to
the units in the different refrigerant cycle, it may cause an
abnormal operation.
• Use twist pair wire (more than 0.75 mm²) for operation wiring
between RASC unit and indoor unit, and operation wiring
between indoor units (H-Link connection). It can be also
used shielded pair wiring. Shield shall be connected to earth
only in one cable side.
• 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.
• Do not use more than 3 cores for operation wiring (H-Link).
Core sizes must be selected according to the national
regulations.
15 PMML0399B rev.0 - 11/2015
!
•
Ssc
•
MODELS "xx"
(kVA)
•
RASC-4HNPE
RASC-5HNPE -
•
RASC-6HNPE
•
•
•
RASC-8HNPE
3138
RASC-10HNPE •
•
•
!
•
•
•
•
•
•
!
•
•
C A U T I O N
Check to ensure that screws for terminal block are tightly tightened.
Check to ensure that the indoor unit fan and the RASC fan have
stopped before electrical wiring work or periodical check is performed.
Protect the wires, drain pipe, electrical parts, from rats or other small
animals. If not protected, rats may damage unprotected parts, and at
the worst, a fire will occur.
Wrap the accessory packing around the wires, and plug the wiring
connection hole with the seal material to protect the product from any
condensed water and insects.
Tightly secure the wires with the cord clamp inside the indoor unit.
Lead the wires through the knockout hole in the side cover when
using conduit.
Secure the cable of the remote control switch with the cord clamp
inside the electrical box.
Electrical wiring must comply with national and local codes. Contact
your local authority in regards to standards, rules, regulations, etc.
Check that the ground wire is securely connected.
Connect a fuse of specified capacity.
D A N G E R
Do not connect of adjust any wiring or connections unless the
main power switch is OFF.
Check that the earth wire is securely connected, tagged and
locked in accordance with national and local codes.
Check and test to ensure that if there is more than one source of
power supply, that all are turned OFF.
Open a hole near the connection hole of power source
wiring when multiple RASC 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
RASC unit.
In the case that a conduit tube for field-wiring is not used, fix
rubber bushes with adhesive on the panel.
C A U T I O N
All the field wiring and electrical components must comply with local
codes.
Pay attention to the connection of the operating line. Incorrect
connection may cause the failure of PCB.