Data Aire DAL-06 - Flooded System Charging (Systems with Low Ambient Receiver Package)

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Top-up the oil while the compressor is idle. Use any accessible connector on the compressor suction
line and a suitable pump. ALWAYS use clean original Danfoss POE oil 160SZ or equivalent from new
cans.
After charging, verifying subcooling and oil level.
Close the valve on the refrigerant manifold gauge set and close the service valve on the refrigerant
tank and disconnect the refrigerant manifold gauge set.
Flooded System Charging (Systems with Low Ambient Receiver Package)
NOTICE: Prior to refrigerant charging, the proper tools and/or equipment must
be available, and the system vacuum and moisture removal procedure must
have been carried out. Refer to Section 5.1 Charging/Installation Work
Procedures and 5.2 Triple Evacuation and Dehydration Procedure prior to
charging the system.
NOTICE: Improper charging procedure could cause compressor damage in
several ways: excessive Low/High Pressure differences, liquid slugging or
vacuum operation. The below system refrigerant charge procedure is strongly
recommended to reduce these risks.
WARNING: The compressor power must be OFF and safeties ON and
prevented from starting inadvertently/automatically.
WARNING: If the system is charged from a vacuum, the preheating of the
compressor is not necessary. But if starting a compressor that has not
been charged from a vacuum, the crankcase heater must be energized
for a minimum of 12 hours to reduce the possibility of liquid slugging on
startup. Failure to energize the crankcase heater could result in
compressor damage.
NOTICE: Charging to a full liquid line sight glass should never be the sole
means of determining the correct refrigerant charge. Other parameters such
as superheat, suction pressure, head pressure, subcooling and ambient
temperature are also important. A system charged to a clear sight glass is
often overcharged.
WARNING: Avoid trapping refrigerant in sections where hydrostatic
pressure can develop. If refrigerant can be trapped in part of the system,
a liquid line relief valve may be required.