Hitachi UTOPIA RAS-3HVRC2 - Transportation and Handling; Before Operation

Start-up and Operation: Check to ensure that all the stop valves are fully opened and no obstacle exists at the inlet/outlet sides
before start-up and during the operation.
Maintenance:Periodically check the high pressure side pressure. If the pressure is higher than the maximum allowable pressure,
stop the system and clean the heat exchanger or remove the cause.
Maximum allowable pressure and high pressure cut-out value:
Maximun allowable pressure (MPa) High pressure switch cut-out value (MPa)
4.15 4.00 ~ 4.10
? NOTE
ThelabelforthevesselunderPEDareattachedonthehighpressure
vessel.Thepressurevesselcapacityandvesselcategoryareindicated
onthevessel.
Location of High Pressure Switch
Compressor
? NOTE
Thehighpressureswitchisindicatedontheelectricalwiringdiagramas
PSHconnectedtoprintedcircuitboard(PCB1)intheoutdoorunit.
Structure of High Pressure Switch
Contact point
Pressure detected
Connected to the electrical wire
! DANGER
• Do not change the high-pressure switch locally or change the high pressure cut-out set value locally. If changed, it will cause serious
injury or death due to explosion.
• Do not attempt to turn service valve rod beyond its stop.
4 TRANSPORTATION AND HANDLING
When hanging the unit, ensure a balance of the unit, check
safety and lift it up smoothly.
Do not remove any packing materials.
Hang the unit under packing condition with two ropes.
For safety reasons ensure that the outdoor unit is lifted smoothly
and does not lean.
Model Unit Gross Weight (kg)
RAS-3HVRC2 48
1
515 mm
180 mm
275 mm
Center of
gravity
5 BEFORE OPERATION
! CAUTION
• Supply electrical power to the system for approximately 12 hours
before start-up or a long shutdown. Do not start the system
immediatelyafterpowersupply,itmaycauseacompressorfailure
becausethecompressorisnotheatedwell.
• Whenthesystemisstartedafterashutdownlongerthatapproximately
3months,itisrecommendedtocheckthe system by your service
contractor.
• TurnOFFthemainswitchwhenthesystemistobestoppedforalong
periodoftime:IfthemainswitchisnotturnedOFF,electricitywillbe
used,becausetheoilheaterisalwaysenergisedduringcompressor
stopping.
• Makesurethattheoutdoorunitisnotcoveredwithsnoworice.If
covered,removeitbyusinghotwater (approximately 50°C). If the
watertemperatureishigherthan50°C,itwillcausedamagetoplastic
parts.
TRANSPORTATION AND HANDLING
PMML0548 rev.0 - 04/2020 - A10648790A
3
EN