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Idiomas disponibles
Idiomas disponibles
Pipe size (mm)
[ Caution ]
Depending on the installation conditions, excessive torque will damage the flared mouth, and too small torque cannot
tighten the nut, which will cause refrigerant leakage. Please refer to the above table to determine the appropriate
tightening torque.
5
Refrigerant Piping Fixing
Angle iron brackets or round steel hangers should be used for fixing. When the liquid pipe and gas pipe are suspended
together, the size of the liquid pipe shall prevail.
Outer diameter of copper
pipe (mm)
Horizontal pipe distance (m)
Stand pipe distance (m)
6
Vacuum Pumping
Connect the refrigerant piping to the gas
and liquid pipes of the ODU, and use a
vacuum pump to evacuate the gas and
liquid pipes of the ODU at the same time.
[ Caution ]
Do not use the refrigerant enclosed in the ODU for vacuuming. The reduction of ODU refrigerant may cause
performance degradation of the air conditioner.
7
Leak Detection
Fill the system with nitrogen and increase its pressure to detect leaks. The following methods are recommended:
1. By foam
Apply soapy water or foam evenly (spray) on areas where leakage may occur, and observe whether air bubbles
appear. If there are no air bubbles, it indicates that the system is airtight.
2. By instrument
Use a refrigerant leak detector to identify leaks. Align the leak detector probe with the part where leakage may occur,
and follow the instructions to determine whether there is a leak.
Φ6.35
Φ9.52
Φ12.7
Φ15.9
Φ19.1
≤20
1.0
1.5
Tightening torque [ N.m (kgf.cm)]
14.2–17.2 (144–176)
32.7–39.9 (333–407)
49.5–60.3 (504–616)
61.8–75.4 (630–770)
97.2–118.6 (990–1210)
20~40
1.5
2.0
IDU
Vacuum pump
30
Installation
≥40
2.0
2.5
ODU
Check valve
High pressure
gauge
Pump
valve
Low pressure
gauge
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