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User Manual - Page 9

For CDXS18LVJU.

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8 ■English
Refrigerant Piping Work
CAUTION
Besuretoinsulateanyeldpipingallthewaytothepipingconnectioninsidetheunit.Anyexposedpipingmaycause
condensationorburnsiftouched.
Cautions on Pipe Handling
•Protecttheopenendofthepipeagainstdustandmoisture.
(Tightenbothedgeswithclamp.)
•
Allpipebendsshouldbeasgentleaspossible.Useapipebenderforbending.
(Seetheminimumbendradiusinthetablebelow.)
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
Selection of Copper and Heat Insulation materials
Whenusingcommercialcopperpipesandttings,observethefollowing:
•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.
•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.1/2inch
(12.7mm)
O.D.5/8inch
(15.9mm)
O.D.1/4inch
(6.4mm)
I.D.15/32-19/32
inch(12-15mm)
I.D.9/16-5/8
inch(14-16mm)
I.D.5/8-25/32
inch(16-20mm)
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
1-9/16inch
(40mm)ormore
1-15/16inch
(50mm)ormore
1-3/16inch
(30mm)ormore
Thickness0.031inch(0.8mm)
(C1220T-O)
Thickness0.039
inch(1.0mm)
(C1220T-O)
Thickness0.031
inch(0.8mm)
(C1220T-O)
Also,whensubjecttohighhumidity,heatinsulationoftherefrigerantpiping(theunitpipingand
branchpiping)mustbefurtherreinforced.
Reinforcetheinsulationwheninstallingtheunitnearbathrooms,kitchens,andothersimilarlocations.
Refertothefollowing:
•86°F(30°C),morethan75%RH:13/16inch(20mm)Min.inthickness
Iftheinsulationisnotsufcient,condensationmayformonthesurfaceoftheinsulation.
•Useseparatethermalinsulationpipesforgasandliquidrefrigerantpipes.
Gas pipe
Liquid pipe
Gas pipe
insulation
Liquid pipe
insulation
Finishing tape
Drain hose
Drain Piping Work
CAUTION
Makesureallwaterisoutbeforemakingtheductconnection.
■
Install the drain piping.
•Makesurethedrainworksproperly.
•Thediameterofthedrainpipeshouldbegreaterthanorequaltothediameterof
theconnectingpipe(vinyltube;pipesize:25/32inch(20mm);outerdimension:
1-1/32inch(26mm)).
Drain pipe connection hole
Refrigerant pipes
Connect the drain pipe after
removing the rubber cap and
insulation tubing attached to
the connection hole.
•Keepthedrainpipeshortandslopingdownwardsatagradientofatleast1/100
topreventairpocketsfromforming.
OK
Wrong
01_EN_3P297301-4D.indd 8 5/8/2017 5:10:24 PM
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