gForce Ultra IOM
61
NOTE: 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, sub-cooling and
ambient temperature are also important. A system charged to a clear sight
glass is often overcharged.
Stop the compressor by pressing and holding the ESC key to put the unit in OFFbyKEY mode. Then
reset the require return air temperature setpoint.
Flooded System Charging (Systems with Low Ambient Receiver Package)
WARNING:
The fixed speed compressor (2
nd
stage) must be charged
before charging the variable speed compressor (1
st
stage) in an Ultra dual
circuit system.
NOTE:
Prior to refrigerant charging, a system vacuum and moisture
removal procedure must have been carried out. Refer to Section
Charging/Installation Work Procedures
NOTE:
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 the safeties ON to
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
start-up. Failure to energize the crankcase heater could result in
compressor damage.
NOTE:
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, sub-cooling and
ambient temperature are also important. A system charged to a clear sight
glass is often overcharged.
Summary of Contents for gForce Ultra
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