Daikin AHQ-C - Инструкция по эксплуатации - Страница 12

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D

A

Piping Works And Flaring Technique

Do not use contaminated or damaged copper tubing. If any pipings, evaporator or condenser had been exposed or had been 
opened for 15 seconds or more, the system must be vacuumed. Generally, do not remove plastic, rubber plugs and brass 
nuts from the valves, 

fi

 ttings, tubings and coils until it is ready to connect suction or liquid line into valves or 

fi

 ttings.

If any brazing work is required, ensure that the nitrogen gas is passed through coil and joints while the brazing work is 
being done. This will eliminate soot formation on the inside walls of the copper tubings.

Cut the pipe stage by stage, advancing the blade of the pipe cutter slowly. Extra force and deep cut will cause more distortion 
on the pipe and thus extra burr. See Figure I.

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Cutting Copper Tube

Figure II

Figure I

Remove Burr

Figure III

Copper Tube

Swaging Block

Spanar

Torque Wrench

Indoor Piping

Flare Nut

Flared Tube

Flare Joint

Figure IV

Ø Tube, D

A (mm)

Inch

mm

Imperial 

(Wing-nut Type)

Rigid 

(Clutch Type)

1/4"

6.35

1.3

0.7

3/8"

9.52

1.6

1.0

1/2"

12.70

1.9

1.3

5/8"

15.88

2.2

1.7

3/4"

19.05

2.5

2.0

Pipe Size 

(mm/in)

Torque 

(Nm/ft-lb)

6.35 (1/4")

18 (13.3")

9.52 (3/8")

42 (31.0")

12.70 (1/2") 

55 (40.6")

15.88 (5/8") 

65 (48.0")

19.05 (3/4") 

78 (57.6")

1/4t

Remove burrs from cut edges of the pipes with remover 
as shown in Figure II. This will avoid unevenness on the 

fl

  are faces which will cause gas leak. Hold the pipe on top 

position and burr remover at lower position to prevent metal 
chips from entering the pipe.

Insert the 

fl

 are nuts, mounted on the connection parts of 

both the indoor unit and outdoor unit, into the copper 
pipes.

The exact length of pipe protruding from the top surface 
of the swaging block is determined by the 

fl

 aring  tool. 

Refer Figure III. 

Fix the pipe 

fi

  rmly on the swaging block. Match the centers 

of both the 

fl

  are die and the 

fl

  aring punch, and then tighten 

the 

fl

 aring punch fully.

Piping Connection To The Units

Align the center of the piping and tighten the 

fl

 are  nut 

suf

fi

 ciently with 

fi

 ngers. Refer Figure IV.

Finally, tighten the 

fl

 are nut with the torque wrench until 

the wrench clicks.

When tightening the 

fl

 are nut with the torque wrench, 

ensure that the tightening direction follows the arrow 
indicated on the wrench.

The refrigerant pipe connection are insulated by closed 
cell polyurethane.

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1 IM 5CEY-0711(1)-EN-Siesta.indd10   10

1 IM 5CEY-0711(1)-EN-Siesta.indd10   10

4/3/13   3:25:53 PM

4/3/13   3:25:53 PM