Refrigeration:
Only qualified service technicians should work on
the refrigeration system. Recovery techniques
should be used where required for the amount of
refrigerant in the system. Refrigeration ports are
not part of factory construction. A suction side port
must be added to service the refrigeration system.
The compressor process tube is a good place to
add the port. Do not add a discharge side port, as
the minimal charge will be affected by the added
space.
Note: prior models use an aluminum condenser
with copper stubs, very careful heat sinks are
required to braze at those connections. An
example could be a flare block clamped over the
aluminum tubing of the condenser. Current models
use copper tube condensers.
The evaporators are also aluminum.
Always use a new drier whenever the sealed
refrigeration system has been opened.
Check the parts list for the correct compressor, fan
motor, blade and condenser.
Replacement of the compressor or condenser is
best done by removing the cabinet from the base.
This requires that the tubing connections to the
evaporator be cut. Removal of the screws at the
side of the base will allow the cabinet to be lifted
up and off the base.
Refrigerant charge for RF33A-1A is 1.75 ounces of
R-12.
Refrigerant charge for RF33A-1WA-1A is 2 ounces
of R-12.
RF33
November 1992
Page 10
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