Hitachi RPC-6.0FSR - Refrigerant Piping Work; Piping Materials

14
A10762300A-rev.1
5. Refrigerant Piping Work
(3) Prepareeld-suppliedcopperpipes.
(4) Selectcleancopperpipes.Makesurethereisnodustandmoistureinside.
(5) TherefrigerantlubricatingoilusedintheseunitsisPolyvinylether(PVE),achemicallystable,resilient,
syntheticlubricantthat,whencombinedwithrefrigerantR410AorrefrigerantR32,maintainsits
compatibility,lubricity,andviscosityoverextendedperiodsoftimeandisimpervioustoheat,oxidation,
moistureabsorptionandbreakdownaslongasitremainsinasealedsystem.Itschemicalproperties
willremainintactonlysolongasmoistureisnotintroducedintothesystem.
Thegaseouselement,PVEisamoisturemagnetthat,onceexposedtoopenairandcan
quicklybecomesaturatedwithmoisture,loseitslubricity,andbecomeuseless.Minimize
exposuretotheopenair,overthesummermonths,andinsouthernortropicalclimates.
(6) Useapipecuttertoavoidagrindswarfgenerationforthepipecuttingwork.(Donotuseasawora
grindstonetocutpipes.)Blowtheinsideofthepipeswithnitrogenordryair,toremoveanydustor
foreignmaterialsbeforeconnectingpipes.
5.1 PipingMaterials
(1) Thetoleranceofrefrigerantpipinglengthdi󰀨ersdependingonthecombinationwiththeoutdoorunit.
Thedetailsshallbereferredto“Installation&MaintenanceManual”oftheoutdoorunit.
(2) Selectthepipingsizefromthefollowingtable.
mm(in.)
Model GasPiping LiquidPiping
RPC-1.5FSR
RPC-2.0FSR
f
12.7 (1/2)
f
6.35 (1/4)
RPC-2.5FSR
RPC-3.0FSR
RPC-4.0FSR
RPC-5.0FSR
RPC-6.0FSR
f
15.88 (5/8)
f
9.52 (3/8)
Fortherefrigerantpipingwork,vacuumpumpandrefrigerantcharge,thedetailsshallbereferredto
“Installation&MaintenanceManual”oftheoutdoorunit.
This machine uses refrigerant R410A or refrigerant R32.
The type of enclosed refrigerant is described in the specication nameplate and caution nameplate
attached to the outdoor unit. When installing, repairing, or relocating, do not mix substances other
than the refrigerant described on the specication nameplate or caution nameplate attached to
the outdoor unit. Also, do not mix refrigerant R410A and refrigerant R32. Entering non-designated
refrigerants, air, oxygen, ammable substances such as propane or alcohol may cause explosion,
re or injury.
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct
CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape.
Attach a cap
or vinyl tape.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water
can enter.