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User Manual - Page 9

For RXS15LVJU.

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8
■
English
Outdoor Unit Installation
6. Relling the refrigerant
Checkthetypeofrefrigeranttobeusedonthemachinenameplate.
Precautions when adding R410A
Fill from the gas pipe in liquid form.
Itisamixedrefrigerant,soaddingitingasformmaycausetherefrigerantcompositiontochange,preventingnormaloperation.
1) Beforelling,checkwhetherthecylinderhasasiphonattachedornot.(Itshouldhavesomethinglike“liquidllingsiphon
attached”displayedonit.)
Filling a cylinder with an attached siphon
Stand the cylinder upright when
filling.
There is a siphon pipe inside, so the
cylinder need not be upside-down to
fill with liquid.
Filling other cylinders
Turn the cylinder upside-down
when filling.
•BesuretousetheR410Atoolstoensurepressureandtopreventforeignobjectsentering.
7. Refrigerant piping work
7-1 Caution on pipe handling
1) Protecttheopenendofthepipeagainstdustandmoisture.
2) Allpipebendsshouldbeasgentleaspossible.Useapipebenderfor
bending.
7-2 Selection of copper and heat insulation materials
Whenusingcommercialcopperpipesandttings,observethefollowing:
1) Insulationmaterial:Polyethylenefoam
Heattransferrate:0.041to0.052W/mK(0.024to0.030Btu/fth°F(0.035to0.045kcal/mh°C))
BesuretouseinsulationthatisdesignedforusewithHVACSystems.
2) Besuretoinsulateboththegasandliquidpipingandtoprovideinsulation
dimensionsasbelow.
Gasside Liquidside
Gaspipethermal
insulation
Liquidpipethermal
insulation
O.D.3/8inch
(9.5mm)
O.D.1/4inch
(6.4mm)
I.
D.15/32-19/32inch
(12-15mm)
I.D.5/16-13/32inch

(8-10mm)
Minimumbendradius Thickness13/32inch(10mm)Min.
1-3/16inch(30mm)ormore
Thickness0.031inch(0.8mm)(C1220T-O)
•Useseparatethermalinsulationpipesforgasandliquidrefrigerantpipes.
Wall
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt or
water out.
Be sure to
place a cap.
Rain
Gas pipe
Liquid pipe
Gas pipe
insulation
Liquid pipe
insulation
Finishing tape
Drain hose
Inter-unit wire
01_EN_3P300674-1B.indd 8 8/28/2012 5:51:00 PM
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