Installation manual

5
4. Installingtherefrigerantpiping
4.1. PrecautionsfordevicesthatuseR410Arefrigerant
• Refertopage3forprecautionsnotincludedbelowonusingaircondition-
erswithR410Arefrigerant.
• Useesteroil,etheroil,alkylbenzeneoil(smallamount)astherefrigeration
oilappliedtothearedsections.
• Use C1220copper phosphorus, for copper and copper alloy seamless
pipes,toconnecttherefrigerantpipes.Userefrigerantpipeswiththethick
-
nesses specied in the table to the below.Make sure the insides of the
pipesarecleananddonotcontainanyharmfulcontaminantssuchassul
-
furiccompounds,oxidants,debris,ordust.
 Alwaysapplyno-oxidationbrazingwhenbrazingthepipes,otherwise,the
compressorwillthedamaged.
Warning:
Wheninstallingormovingtheairconditioner,useonlythespeciedrefriger
-
ant(R410A)tochargethe refrigerantlines.Donotmixitwithanyotherre
-
frigerantanddonotallowairtoremaininthelines.Airenclosedinthelines
cancausepressurepeaksresultinginaruptureandotherhazards.
Pipe size (mm) ø6.35 ø9.52 ø12.7 ø15.88 ø19.05 ø22.2 ø25.4 ø28.58
Thickness (mm)
0.8 0.8 0.8 1.0 1.0 1.0 1.0 1.0
• Donotusepipesthinnerthanthosespeciedabove.
• Use1/2HorHpipesifthediameteris22.2mmorlarger.
• FortheRP250,use1/2HorHpipesifthediameteris19.05mmorlarger.
4.2. Connectingpipes
• When commercially available copper pipes are used, wrap liquid and gas pipes
with commercially available insulation materials (heat-resistant to 100°C or more,
thickness of 12 mm or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam
insulation materials (specic gravity of 0.03, thickness of 9 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten
-
ing are nut.
A
(Fig. 4-1)
• Use two wrenches to tighten piping connections.
B
(Fig. 4-1)
• Use leak detector or soapy water to check for gas leaks after connections are
completed.
• Apply refrigerating machine oil over the entire are seat surface.
C
(Fig. 4-1)
• Use the are nuts for the following pipe size.
D
(Fig. 4-1)
INDOOR UNIT RP50 RP60, 71 RP100-140
Gas side Pipe size (mm)
ø12.7 ø15.88 ø15.88
Liquid side Pipe size (mm)
ø6.35 ø9.52 ø9.52
• When bending the pipes, be careful not to break them. Bend radii of 100 mm to
150 mm are sufcient.
• Make sure the pipes do not contact the compressor. Abnormal noise or vibration
may result.
1
Pipes must be connected starting from the indoor unit.
Flare nuts must be tightened with a torque wrench.
2
Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil
(Applied on site).
• When usual pipe sealing is used, refer to Table 1 for aring of R410A refrigerant
pipes.
The size adjustment gauge can be used to conrm B measurements.
Table 1 (Fig. 4-2)
Copper pipe O.D.
(mm)
B (mm)
Flare tool for R410A Flare tool for R22·R407C
Clutch type
ø6.35 (1/4") 0 - 0.5 1.0 - 1.5
ø9.52 (3/8") 0 - 0.5 1.0 - 1.5
ø12.7 (1/2") 0 - 0.5 1.0 - 1.5
ø15.88 (5/8") 0 - 0.5 1.0 - 1.5
ø19.05 (3/4") 0 - 0.5 1.0 - 1.5
3
Use the following procedure for connecting the gas-side piping. (Fig. 4-3)
1 Braze the
E
Joint pipe provided to the outdoor unit using locally procured braz
-
ing materials and
C
Local piping without oxygen.
2 Connect the
E
Joint pipe to the gas-side Stop valve.
Use two wrenches to tighten the are nut.
* If order is reversed, refrigerant leak occurs because of the part damaging by brazing re.
• For PEA-RP200, 250, 400, 500GA
The method of pipe connection is brazing connection.
PEA-200 PEA-250 PEA-400 PEA-500
Gas side Pipe size (mm)
ø25.4 ø25.4 ø25.4 ø25.4
Liquid side Pipe size (mm)
ø9.52 ø12.7 ø9.52 ø12.7
A
(Fig. 4-1)
Copper pipe O.D.
(mm)
Flare dimensions
øA dimensions (mm)
ø6.35 8.7 - 9.1
ø9.52 12.8 - 13.2
ø12.7 16.2 - 16.6
ø15.88 19.3 - 19.7
ø19.05 23.6 - 24.0
B
(Fig. 4-1)
Copper pipe O.D.
(mm)
Flare nut O.D.
(mm)
Tightening torque
(N·m)
ø6.35 17 14 - 18
ø6.35 22 34 - 42
ø9.52 22 34 - 42
ø12.7 26 49 - 61
ø12.7 29 68 - 82
ø15.88 29 68 - 82
ø15.88 36 100 - 120
ø19.05 36 100 - 120
A
Flare cutting dimensions
B
Flare nut tightening torque
A
Die
B
Copper pipe
A
Stop valve (gas-side)
B
Seal section
C
Local piping
D
Double spanner section
E
Joint pipe
F
Pipe cover
Fig.4-1
Fig.4-2
Fig.4-3
45° ± 2°
90° ± 0.5°
R0.4 ~ R0.8
BG79U791K01_en.indd 5 9/18/2007 3:43:19 PM