Samsung AG010KSV Series Installation Manual page 77

Vacuuming the pipes
Use tools for R-410A to prevent the inflow of foreign substances and resist against the internal pressure.
Use vacuum pump that allows vacuuming under 5 Torr.
Use the vacuum pump with the check valve to prevent pump oil from flowing backward while the vacuum pump is
stopped.
When testing air tightness and vacuuming, use charging port on product.
Connect manifold gauge to charging port
Perform vacuuming using a vacuum pump
While the pressure is less than 5 Torr on
vacuum gage, perform vacuuming for
more than 1 hour and close the valve
After the vacuum pump stops, check
whether the pressure is maintained within
5 Torr for an hour
Over 5 Torr
No
Charging refrigerant
CAUTION
If the pressure rises in an hour, either water is remaining inside the pipe or there is a leakage.
When the ambient temperature of vacuuming pipe is low (less than 0°C (32°F)), moisture might remain within
the pipe. Therefore, pay special attention to the pipe sealing in the winter.
When installing products in module, connect the manifold gauge to
each charging port.
Make sure that check valve is installed to prevent pump oil from
flowing into the pipe.
Vacuum pressure must be checked with the vacuum gauge.
Check leakage
Yes
Vacuum destruction
Apply nitrogen gas to the pipe at
pressure of 0.05 MPa (7.25 psi)
Perform vacuum drying again
No
Pressure increase
Yes
English
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