PUMY-SP112YKMD User Manual

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A Flare cutting dimensions

B Flare nut tightening torque

A Die

B Copper pipe

Fig.4-8

Fig.4-9

A (Fig. 4-8)

B (Fig. 4-8)

90°± 0.5°

øA

45°± 2°

R0.4 - R0.8

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

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

4.2. Connectingpipes(Fig.4-8)

Fig. 4-1, 4-2 is a sample of piping system.

• Conductsufcientanti-condensationandinsulationworktopreventwaterdripping

fromtherefrigerantpiping.(liquidpipe/gaspipe)

• Increase insulation depending on the environment where the refrigerant piping

is installed, or condensation may occur on the surface of the insulation material.

(Insulation material Heat-resistant temperature: 120 °C, Thickness: 15 mm or more)

* When the refrigerant piping is used in locations subject to high temperature and

humidity such as in the attic, further addition of insulation may be required.

• Toinsulatetherefrigerantpiping,applyheat-resistantpolyethylenefoambetween

the indoor unit and insulation material as well as to the net between the insulation

materialllingallgaps.

(Condensation forming on the piping may result in condensation in the room or

burns when contacting the piping.)

• Besuretoseparatethermalinsulationforgasandliquidrefrigerantpipes.

• Theindoorpartsofthedrainpipeshouldbewrappedwithpolyethylenefoaminsula-

tion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tightening

arenut.A

• Use2wrenchestotightenpipingconnections.B

• 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

• Usethearenutsforthefollowingpipesize.D

City Multi Indoor unit

Outdoor unit

15-50 63-140

Gas side Pipe size (mm) ø12.7 ø15.88 ø15.88

Liquid side Pipe size (mm) ø6.35*1 ø9.52 ø9.52

*1 Ifthefarthestpipinglengthaftertherstjointexceeds30m,useapipesizeofø9.52.

• When bending the pipes, be careful not to break them. Bend radius of 100 mm to

150mmis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 (Ap-

plied on site).

• Whenusualpipesealingisused,refertoTable3foraringofR410Arefrigerant

pipes.

 ThesizeadjustmentgaugecanbeusedtoconrmAmeasurements.

 * Toconnectthe CONNECTIONKIT(PAC-LV11M-J),refertotheinstallation

manualfortheCONNECTIONKIT.

Table 3 (Fig. 4-9)

Copper pipe O.D.

(mm)

A (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

4. Installingtherefrigerantpiping

RG79Y960H01.indb 12 2018/02/09 14:31:06

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User Manual - Page 12