Samsung AM300MXVGNR4ET - Vacuum Drying Procedure

88
Air tightness test and vacuum drying
Vacuum drying pipes and indoor units
 Ƹϑʪϩͱͱϑ˙ͱθŵࣛߦߣߢϩͱΧθʪЭʪϩϩ˵ʪѤͱиͱ˙˙ͱθʪ˝ϑЇɵϑϩɇʀʪϑɇʒθʪϑϑϩɇ˝ɇϑϩϩ˵ʪϩʪθɇΧθʪϑϑЇθʪ࢏
 Use vacuum pump that allows vacuuming under -100.7kPa (5 Torr).
 Ƹϑʪϩ˵ʪЭɇʀЇЇΧЇΧиϩ˵ϩ˵ʪʀ˵ʪʀЭɇЭʪϩͱΧθʪЭʪϩΧЇΧͱ˙θͱѤͱи˝ɵɇʀиɇθʒи˵ʪϩ˵ʪЭɇʀЇЇ
pump is stopped.
 Completely close the liquid gas side service valve of the outdoor unit.
Charge additional refrigerant to the pipe
No
Yes
Perform vacuum drying again
Check for gas leakage
Vacuum destruction
࡛Apply nitrogen gas to the pipe at
ΧθʪϑϑЇθʪͱ˙ߢ࢏ߢߧđΧɇ࢏
YesNo
ĮЭʪθࣛߣߢߢ࢏ߩťɇ࣑ߧƟͱθθ࣒
Pressure increase
Connect the manifold gauge to the liquid
side pipe and gas side pipe (when installing
outdoor units in module).
When installing outdoor units in module, connect the manifold
gauge to liquid side pipe and the gas side pipe.
Perform vacuum drying of the liquid side pipe
and gas side pipe (when installing outdoor
units in module) using a vacuum pump.
Make sure that check valve is installed to prevent pump oil from
Ѥͱи˝ϩͱϩ˵ʪΧΧʪ࢏
While the vacuum gauge pressure is less than
ࣛߣߢߢ࢏ߩťɇ࣑ߧƟͱθθ࣒ࡥΧʪθ˙ͱθϩ˵ʪЭɇʀЇЇʒθц˝
for more than 1 hour and close the valve.
Vacuum pressure must be checked with the vacuum gauge.
After vacuum pump stops, check whether
ϩ˵ʪΧθʪϑϑЇθʪϑɇϩɇʪʒиϩ˵ࣛߣߢߢ࢏ߩťɇ
࣑ߧƟͱθθ࣒˙ͱθɇ˵ͱЇθ࢏
࢜
If the pressure rises in an hour, either water is remaining inside the pipe or there is a leakage.
࢜
Ǯ˵ʪϩ˵ʪɇɵʪϩϩʪΧʪθɇϩЇθʪͱ˙ЭɇʀЇЇ˝ΧΧʪϑͱи࣑ʪϑϑϩ˵ɇߢঌA࣒ࡥͱϑϩЇθʪ˝˵ϩθʪɇиϩ˵
the pipe. Therefore, pay special attention to the pipe sealing in the winter.