Excessive torque can break nut on installation conditions.
When flared joints are reused indoors,the flare part should be re-fabricated.
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.
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.
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
Caution
Pipe size (mm)
Tightening torque [ N.m (kgf.cm)]
Φ6.35
14.2–17.2 (144–176)
Φ9.52
32.7–39.9 (333–407)
Φ12.7
49.5–60.3 (504–616)
Φ15.9
61.8–75.4 (630–770)
Φ19.1
97.2–118.6 (990–1210)
Refrigerant Piping Fixing
Vacuum Pumping
Pipe outer diameter (mm)
≤20
20~40
≥40
Horizontal pipe distance (m)
1.0
1.5
2.0
Stand pipe distance (m)
1.5
2.0
2.5
Do not use the refrigerant enclosed
in the ODU for vacuuming. The
reduction of ODU refrigerant may
cause performance degradation of
the air conditioner.
25
Installation
IDU
ODU
High pressure gauge
Pump valve
Vacuum pump
Check
valve
Low pressure gauge
Summary of Contents for KSEF-22 DN5.0
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