Refrigerants; Refrigerant Oil Charge; Evacuation Procedures - Compu-aire System 2100 Series Installation And Operation Manual

7 REFRIGERANTS

7.1 REFRIGERANT OIL CHARGE

DO NOT MIX DIFFERENT TYPE OF REFRIGERANT ON THE SAME SYSTEM.
For adding refrigerant oil please follows compressor manufacturer for the proper type of refrigerant
oil used for the system. DO NOT MIX DIFERRENT TYPE REFRIGERANT OIL IN THE SAME SYSTEM OR
COMPONENT FAILURE AND SYSTEM MALFUNCTION MAY OCCUR.
The system 2100 unit is shipped with factory pre-charged refrigerant or nitrogen. System must be
charged enough with correct type of refrigerant and refrigerant oil. Generally, the oil charge should
be 2 to 3% of the liquid line charge. USE ONLY POLYOL ESTER (POE-32) OIL FOR ALL THE
COMPRESSORS. See the compressor name plate for original oil charge. Manufacturer recommends
compressor should be charged 4 fluid ounces (118 ml) less than the name plate value for a full
complete recharge on the compressor.
It is recommended if the system contains more than 20 lbs (9 kg) of refrigerant; add one fluid ounce
for every additional 5 pounds (15ml/kg) of refrigerant over this amount.

7.1.1 Evacuation Procedures

CAUTION: PULL ALL FUSES EXCEPT MAIN FAN AND TRANSFORMER FUSES. To reduce the possibility
of non-condensable in the refrigerant system during charging, the solenoid valves must be open and
a vacuum must be pulled on both the suction side and the discharge side of the compressor.
PROCEDURE FOR DEHYDRATION - METHOD #1
1) Open all disconnects switches.
2) Pull all fuses except main fan and transformer fuses.
3) Turn disconnect ON
4) Start the main fan by pushing the main fan switch.
5) Check amperage on main fan and make sure it does not exceed FLA (full load amps).
6) Check fan rotation and correct if necessary.
7) Set thermostat at 40
8) Proceed with paragraph #4 in procedure #2.
PROCEDURE FOR DEHYDRATION - METHOD #2
By using a separate control voltage transformer having an output of 24 volts at 40 VA, the
solenoid can be energized without starting the unit.
1) Turn all power OFF to the unit.
o
F.
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