51
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Tightening of connection parts
Alight the pipes to be connected and tighten the flare nuts with your hands first and then with a torque wrench, tighten
it in a direction shown in below illustration.
- You can avoid of gas leakage by applying refrigerant oil on the flare connection part.
Pipe
Flare connection part
Flare nut
Monkey
spanner
Torque
wrench
Diameter(D)
ø6.35mm
ø9.52mm
ø12.70mm
ø15.88mm
ø19.05mm
Torque (kgf•cm)
140~170
250~280
380~420
440~480
990~1210
• Apply the torque depending on the diameter and tighten it securely to make sure there is no leakage.
CAUTION
5. Eliminate the uncondensed gas with vacuum pump and open the service valve to put the refrigerant.
- Make sure to perform leak test. (Refer to 'Performing leak test' on page 58.)
6. Insulate the drain hose after connecting it.
- Insulate it correctly to avoid dew formation.
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Pipe insulation
1) Insulate the refrigerant pipes heavily with the finishing tape.
If the insulation is poor, dew may form and leak through the
indoor.
2) Use finishing tape wind up the refrigerant pipe.
3) When you bend the pipe and secure a minimum bending
radius of 100mm to prevent any distortion of the pipe.
Pipe insulation
Finishing tape
Indoor/outdoor unit
power cable
Indoor/outdoor unit
communication cable
7. Wind a finish tape when connecting refrigerant pipe, and communication cable is completed.
Indoor unit
Outdoor unit
Low
pressure
pipe
High
pressure
pipe
Flare
nut
High pressure side
Low pressure side
Service port
Stop valve
Service port cap
L wrench
Valve core
사우디,남아공향 FAC MEMORY 냉난방_IBIM_EN_03892A(2).indd 51
2013-04-17 오전 11:07:50
