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Desert Aire - LC/LV Manual
Acid Indicated
•
Install a suction line filter shell and charcoal activated core such as a Sporlan or Emerson
HH core type or equivalent. The acid levels will be monitored and several core changes may
be required. Install ball valves on either side of the suction filter to facilitate these changes.
Note that larger Desert Aire systems will have suction filter shells installed from the factory.
The shell can be used with charcoal activated cores. Note that a “safety screen” may be
required with some manufacturer’s cores to prevent small pieces of the core from dislodging
and finding their way to the compressor. Follow filter shell and core manufacturer’s
instructions.
•
Review compressor and suction line for area where future oil samples can be taken from the
system. If an access fitting exists on the compressor shell below the oil level, no further
action is needed. If this is not available, an access fitting can be located at the bottom of a
trap in the suction line. Braze in a fitting as required to be able to remove an oil sample.
Note:
It is acceptable to use acid test kits that sample the refrigerant and connect to
Schrader fittings.
•
Ensure there are access fittings directly upstream and downstream of the suction filter. There
is typically one fitting installed on the suction filter. There may be a bulkhead fitting attached
to the compressor suction side.
•
Do not use acid neutralizing additives or other chemicals for acid removal. The refrigeration
system must contain only oil and refrigerant. Precipitates of additives and acids may be
considered contamination in the refrigeration system. Other compounds may be present in
additives as carriers. Long-term effects of specific additives or compounds with a particular
system or design are unknown without significant controlled testing.
Particulate Indicated
•
Install a replaceable core liquid line filter shell. Note that larger Desert Aire systems will have
replaceable core liquid line filter shells installed from the factory. The pressure drop levels will
be monitored and several core changes may be required. Install ball valves on either side of
the filter shell to facilitate these changes.
•
Install a secondary filter such as Sporlan FS-series or equivalent 20 micron filter in the
replaceable core.
•
Ensure there are access fittings directly upstream and downstream of the liquid filter. There
is typically one fitting installed on the filter shell. There is typically a fitting installed on the
outlet side of the receiver.
Summary of Contents for ExpertAire LC Series
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