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5

English

Outdoor Unit Installation

3.

Flaring the pipe end. 

1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing 

downward so that the chips do not enter the pipe.

3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.

 WARNING

1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incomplete flaring may cause refrigerant gas leakage.

4.

Refrigerant piping.

 CAUTION

1) Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
3) Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.

Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches. 

(Cut exactly at 

right angles.)

 Remove burrs

Set exactly at the position shown below.

A

Flaring

Die

Check

Flare’s inner 
surface must 
be flaw-free.

The pipe end must 
be evenly flared in 
a perfect circle.

Make sure that the 
flare nut is fitted.

A

0-0.5mm

Clutch-type

Flare tool for R410A

1.0-1.5mm

Clutch-type (Ridgid-type)

1.5-2.0mm

Wing-nut type (Imperial-type)

Conventional flare tool

Torque wrench

Piping union

Flare nut

 

Flare nut tightening torque

  

Gas side 

Liquid side

  

3/8 inch 

1/4 inch

  

32.7-39.9N • m  

14.2-17.2N • m

   (333-407kgf • cm)  

(144-175kgf • cm)

 

Valve cap tightening torque

  

Gas side 

 

Liquid side

  

3/8 inch 

 

1/4 inch

  

21.6-27.4N • m  

 

21.6-27.4N • m

   (220-280kgf • cm)  

  (220-280kgf • cm)

Service port cap  

 

10.8~14.7N • m

tightening torque  

(110~150kgf • cm)

Do not apply refrigeration 

oil to the outer surface.

Flare nut

Apply refrigeration oil to 

the inner surface of the 

flare.

Do not apply refrigeration 

oil to the flare nut avoid 

tightening with over torque.

Spanner

[Apply oil]

[Tighten]

3PEN395501-3G.book  Page 5  Thursday, June 2, 2016  8:07 AM

Summary of Contents for RX25KMV1B

Page 1: ...INSTALLATION MANUAL R410A Split Series Models RX25KMV1B RX35KMV1B 3PEN395501 3G book Page 1 Thursday June 2 2016 8 07 AM...

Page 2: ......

Page 3: ...ositivamente por B de acuerdo con el Certificado C 06 Nota delineato nel A e giudicato positivamente da B secondo il Certificato C 07 A B C 08 Nota tal como estabelecido em A e com o parecer positivo...

Page 4: ...receive no external stresses Incomplete connections or clamping may cause terminal overheating or fire After connecting interconnecting and supply wiring be sure to shape the cables so that they do n...

Page 5: ...nnot be installed hanging from ceiling or stacked CAUTION When operating the air conditioner in a low outdoor ambient temperature be sure to follow the instructions described below 1 To prevent exposu...

Page 6: ...pe exceeding 10m in length Be sure to add the proper amount of additional refrigerant Failure to do so may result in reduced perfomance The suggested shortest pipe length is 1 5m in order to avoid noi...

Page 7: ...nit refer to Precautions for Selecting the Location and the Outdoor Unit Installation Drawings 2 If drain work is necessary follow the procedures below 2 Drain work only for heat pump models If the dr...

Page 8: ...en tightening the flare nuts to prevent damage to the flare nuts and gas leakage Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand Then tighten them fully with the torqu...

Page 9: ...mes from gauge manifold to gas stop valve s service port 2 Fully open gauge manifold s low pressure valve Lo and completely close its high pressure valve Hi High pressure valve subsequently requires n...

Page 10: ...lation dimensions as below 3 Use separate thermal insulation for gas and liquid refrigerant pipes Gas side Liquid side Gas pipe thermal insulation Liquid pipe thermal insulation O D 9 5mm O D 6 4mm I...

Page 11: ...ss the indoor unit operation stop button Using the main unit s remote controller 1 Press the operation stop button Operation will start 2 Press the temperature button and the operation select button a...

Page 12: ...match Tighten the terminal screws securely We recommend a flathead screwdriver be used to tighten the screws The screws are packed with the terminal board Observe the notes mentioned below when wiring...

Page 13: ...roblems with the work may cause heat and fires 3 Pull the wire and make sure that it does not disconnect Then fix the wire in place with a wire stop Strip wire end to this point Excessive strip length...

Page 14: ...T THERMISTOR E H HEATER RC RECEIVER F U FU FORCHARACTERISTICS REFERTOPCBINSIDEYOURUNIT FUSE S C LIMITSWITCH FG CONNECTOR FRAMEGROUND S L FLOATSWITCH H HARNESS S NPH PRESSURESENSOR HIGH H P LED V L PIL...

Page 15: ...al to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a small amount of power in its standby mode If the system is not to be used for some...

Page 16: ...3PEN395501 3G book Page 1 Thursday June 2 2016 8 07 AM...

Page 17: ...3P395501 3G 2016 05 Copyright 2016 Daikin 3PEN395501 3G book Page 2 Thursday June 2 2016 8 07 AM...

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