Hitachi RAS-3HVNC1 - 14.2 PIPING CONNECTION FOR OUTDOOR UNIT; Connecting Outdoor Unit Piping and Stop Valves

12
ON
DSW6
12
ON
DSW6
12
ON
DSW6
Operating line
Operating line Operating line
Remote control line
Remote control line
Remote control line
Individual control
Running ON/OFF individually
Thermo.ON/OFF individually
Individual control
Running ON/OFF simultaneously
Thermo.ON/OFF individually
Simultaneous control
Running ON/OFF simultaneously
Thermo.ON/OFF simultaneously
(IVX series only)
10.3.2 Wire size and Main switch protection
Recommended minimum sizes for eld provided wires and select the main switches according to the next table:
Model Power supply
Power source cable size Transmitting cable size
Max. current
(A)
CB
(A)
ELB
(nº poles/A/mA)
EN60 335-1 EN60 335-1
All Indoor Units
1~ 230V 50Hz
0.75 mm²
0.75 mm²
5.0 6 2/40/30
RAS-2HVNP1 2.5 mm
2
13.8 16
2/40/30
RAS-2.5HVNP1 4.0 mm
2
15.8 20
RAS-3HVNC1 4.0 mm
2
17.8 20
RAS-3HVRNS3 4.0 mm
2
17.8 20
? NOTE
• ELB:Earthswitch;CB:Circuitbraker
• Followlocalcodesandregulationswhenselectingeldwires,CircuitbreakersandEarthLeakagebreakers
• Usethewireswhicharenotlighterthantheordinarypolychloroprenesheathedexiblecord(codedesignationH05RN-F)
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
conrm that the electrical wiring and the refrigerant piping are
correctly connected.
Test run should be performed according to the “11.1TestRun
procedurebyRemoteControlSwitch(PC-ARTexample)” on
next page.
! CAUTION
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
• Conrmthatthegaslinestopvalveandtheliquidlinestopvalveare
fullyopen.
• Conrmthattheleakageoftherefrigerantdoesnotexist.Theare
nutsaresometimesloosenedbyvibrationduringtransportation.
• Checkthattherefrigerantpipingandtheelectricalwiringconformto
thesamesystem.
• Conrm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 “10 Electric
wiring”.
! CAUTION
Conrmthateld-suppliedelectricalcomponents(mainswitchfuse,fuse-
freebreaker,earthleakage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.
? NOTE
• 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.
• Inthecaseofanualcoolingoptional function, cut JP1 outandset
theDSW6-1toOFF.(Individualcontrolisnotavailablewhenanual
coolingisselected),(IVXseriesonly).
COMMISSIONING
PMML0398B rev.0 - 11/2015 - P5416651
14