Power Supply; Commissioning - Hitachi UTOPIA RAS-3HVRC2 Bedienungsanleitung

COMMISSIONING

10.3.2 Wire size and Main switch protection
Recommended minimum sizes for field provided wires and select the main switches according to the next table:
Model

Power supply

All Indoor Units
1~ 230V 50Hz
RAS-3HVRC2
?
N O T E
• ELB: Earth leakage Breaker; CB: Circuit breaker
• Follow local codes and regulations when selecting field wires, Circuit breakers and Earth Leakage breakers.
• Use the wires which are not lighter than the ordinary polychloroprene sheathed flexible cord (code designation 60245 IEC 57).
11 COMMISSIONING
When installation is completed, perform test run according to the
following procedure, and hand over the system to the customer.
Perform test run regarding indoor units one by one in order, and
confirm that the electrical wiring and the refrigerant piping are
correctly connected.
!
C A U T I O N
Do not operate the system until all the check points have been cleared:
• Check to ensure that the electrical resistance is more than 1 MΩ, by
measuring the resistance between ground and the terminal of the
electrical parts. If not, do not operate the system until the electrical
leakage is found and repaired. Do not impress the voltage on the
terminals for transmission 1 and 2.
• Check to ensure that the stop valves of the outdoor unit are fully
opened, and then start the system.
• Check to ensure that the switch on the main power source has been
ON for more than 12 hours, to warm the compressor oil by the oil
heater.
Pay attention to the following items while the system is running:
• Do not touch any of the parts by hand at the discharge gas side,
since the compressor chamber and the pipes at the discharge side
are heated higher than 90°C.
• DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES), it
will cause a serious accident.
• Do not touch any electrical components for more than three minutes
after turning OFF the main switch.
• Confirm that the gas line stop valve and the liquid line stop valve are
fully open.
• Confirm that the leakage of the refrigerant does not exist. The flare
nuts are sometimes loosened by vibration during transportation.
• Check that the refrigerant piping and the electrical wiring conform to
the same system.
• Confirm that the DIP switch setting on the printed circuit board of the
indoor units and the outdoor units are correct.
• Check whether or not the electrical wiring of the indoor units and the
outdoor units are connected as shown in the chapter
wiring".
14 PMML0548 rev.0 - 04/2020 - A10648790A
Power source cable size Transmitting cable size
EN60 335-1
0.75 mm²
4.0 mm
2
"10 Electric
Max. current
EN60 335-1
0.75 mm²
15.8
!
C A U T I O N
Confirm that field-supplied electrical components (main switch fuse, fuse-
free breaker, earth leakage breakers, wires, conduit connectors and wire
terminals) have been properly selected according to the electrical data
given in the Technical Catalog of the unit and ensure that the components
comply with national and local codes.
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N O T E
For 2 indoor units system check the indoor unit outlet air temperature
at test run. If the temperature difference is large (aprox. 10 deg. or
more (cooling) 20 deg. or more (heating) recheck the refrigerant piping,
installation may have some problem.
CB ELB
(A) (A) (nº poles/A/mA)
5.0 6
2/40/30
20