Hitachi UTOPIA RAS-4HVRP2E Installations- Und Betriebshandbuch Seite 44

Electric wiring
10 ELECTRIC WIRING
10.1 GENERAL CHECK
!
D A N G E R
• Do not connect or adjust any wiring or connections unless the
main power switch is OFF. Check and test to ensure that if there
is more than one source of power supply, all are turned OFF.
• 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 or circuit breaker of the
specific capacity for each outdoor unit power line. Not fitting it
may cause an electric shock or fire.
• Check that the earth wire is securely connected, tagged and
locked in accordance with national and local codes.
!
C A U T I O N
• Before any work to the electrical wiring or regular inspections, switch
off the mains power supply of the indoor and outdoor units. Wait three
minutes before starting installation or maintenance work.
• Make sure that the interior and exterior fans have come to a complete
standstill before starting work on the electrical wiring or regular
inspections.
• Protect cables, the drainage pipe, electrical components, etc. from
rodents and insects; otherwise these might damage unprotected
components and this could result in fire.
• Do not allow cables to come into contact with the refrigerant pipes,
metal edges, printed circuit boards (PCB) or the electric components
inside the unit; the cables may be damaged and this could result in
fire.
• Make sure the refrigerant pipes and communication cables between
the outdoor and indoor units are connected to the same refrigeration
cycle. Failure to do so could lead to abnormal operations or a serious
accident.
• Make sure that the field-supplied electric components in the installation
(mains power switches, earth leakage breaker, circuit breaker, cables,
connectors, cable terminals and others) have been selected and
install correctly in line with the electrical data given in this Manual. Also
make sure that these components are compliant with local, national
and regional electrical regulations, codes and standards
• Connecting the operating line cables incorrectly may lead to faults in
the PCB.
• Firmly secure the cables inside the outdoor unit with plastic flanges.
• Check to ensure that screws for terminal block are tightly tightened.
• Secure the cable of the remote control switch with the cord clamp
inside the electrical box.
• 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.
• Check to ensure that the indoor fan and the outdoor fan have stopped
before electrical wiring work or periodical check is performed.
• 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.
• Make sure the electric components in the installation (earth leakage
breaker, circuit breaker, cables, connectors, cable terminals and main
power switches) have been selected correctly in line with the electrical
data given in this Manual. Also make sure that these components are
compliant with national and local codes.
• Check that the ground wire is securely connected.
• Connect a fuse or CB of specified capacity.
13 PMML0545 rev.2 - 04/2021
?
N O T E
• To avoid electromagnetic noise interferences use shielded wires
for H-LINK communication twist pair wire (more than 0.75 mm²)
operation wiring between outdoor unit and indoor unit, and operation
wiring between indoor unit and indoor unit.
• H-LINK twist pair shielded wire must be grounded in the outdoor unit
side.
• Using cable sections between units no longer than 300 m, and
using cables according to local codes and regulations. H-LINK
communication circuit shall be not longer than 1000 m in total length
• Sometimes, the refrigeration/heating system is not able to operate
correctly in cases when the system is supplied from the same
supply line as other major consumers (heavy machinery, power
inverter systems, cranes, welding machinery, etc). Also when the
supply cables of the major consumers and the system are very close
together, induction in the wiring may arise due to a rapid change in
the electricity consumption of the above consumers and their start-up.
• Check and test to ensure that if there is more than one source of
power supply, that all are turned OFF.
• Check the connection of the power wiring terminals and supply
voltage according to each model specification.
1 Following the Council Directive 2014/30/EU, relating to
electromagnetic compatibility, next table indicates:
Maximum permissible system impedance Z
interface point of the user's supply, in accordance with
EN61000-3-11
MODEL Z
max
RAS-4HV(R/N)(C/P)2E 0.30
RAS-5HV(R/N)(C/P)2E 0.30
RAS-6HV(R/N)(C/P)2E 0.30
2 Harmonics situation of each model regarding EN 61000-3-2
and EN 61000-3-12 is as follows:
MODELS SITUATION
REGARDING EN 61000-3-2
AND EN 61000-3-12 Ssc "xx"
Equipment complying with
EN 61000-3-2 (professional use)
Equipment complying with
EN 61000-3-12
3 Check to ensure that the power supply voltage is within
+/- 10% of the rated voltage.
4 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.
at the
max
(Ω) MODEL Z
RAS-4H(R/N)(C/P)2E
RAS-5H(R/N)(C/P)2E
RAS-6H(R/N)(C/P)2E
MODELS
RAS-(4-6)H(R/N)(C/P)2E
RAS-(4-6)HV(R/N)(C/P)2E
(Ω)
max
-
-
-
Ssc
"xx"
(KVA)
-
633