gForce Ultra IOM
54
Charging Procedures
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: 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.
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.
Refrigerant Handling
The use of recovery/recycling units is required by U.S. Environmental Protection Agency (EPA)
regulations. Technicians who service and dispose of air conditioning and refrigeration equipment must
recover the refrigerant instead of venting it to the atmosphere. Except for extremely small releases of
refrigerant such as what occurs when disconnecting service hoses, a technician who knowingly
releases or vents refrigerant to the atmosphere is in violation of this regulation. Refrigerant purchasers
must be certified technicians and have a valid EPA certification card.
Air-cooled System Charging
Air-cooled condensers provided with Data Aire equipment have integral fan speed controls. The fan
speed control is programmed at the factory to start the fan at a specific head pressure and increase
speed (i.e., airflow) when enough head pressure is developed, the fan will run at full speed. The
programming of this fan speed control is based on the refrigerant (R-410A) required by the order.
Please see the Air-Cooled Condenser User Manual for more detailed information on fan speed control.
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.
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