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Light ballasts are located on mullions of
the door frames. See the Anthony ballast re-
moval instructions at the back of the booklet.
Commercial Doors –
See Door Instructions at
the back of this booklet.
Refrigeration –
As stated previously, these cases are self-
contained with the condensing unit mounted at
the top or bottom. they are equipped with a
hermetic compressor and a capillary tube. The
condenser is of fin and tube construction and
should be periodically cleaned to maintain effi-
cient operation.
If it should become necessary to leak test
the system, please adhere following notice:
NOTICE –
Because of the CFC atmoshperic
considerations being taken today, we ask that
leak testing be done with refrigerant 22 mixed
with nitrogen. If the condensing unit nameplate
designates a refrigerant other than R-22 re-
move all R-22 from the immediate area to avoid
confusion after leak testing and evacuating the
unit. Recharge the unit with proper refriger-
ant.
Leak Testing -
The test gas cylinder must be equipped
–
CAUTION
with a pressure gauge and regulators so that
system test pressures do not exceed maximum
allowable limits. Do not ever use anything
other than an R-22/Nitrogen mixture for leak
testing.
Attach a refrigerant test gas cylinder to
your service manifold and connect the manifold
to the charging port on the liquid line valve.
Charge an R-22/Nitrogen mixture into the sys-
tem, raising the pressure to the remote unit's
nameplate for the low side and high side pres-
sures. Using the electronic detector, carefully
check the entire system for leaks. Take special
care to inspect all brazed and flare connections.
Evacuation –
After the system is proven leak tight,
thoroughly evacuate the system according to
the following procedure:
Discharge the refrigerant-nitrogen mixture,
allowing it to blow from the system as rap-
idly as possible, into an empty cylinder. Be
sure that all service valves and solenoid
valves are open to allow all of the mixture to
be discharged.
Connect a deep-drain vacuum pump to both
the high and low side of the system. Pull a
vacuum on the system to at least 1500 mi-
corns.
Break the vacuum by adding refrigerant
into the system until the pressure is above 0
psig. Always charge the refrigerant line into
the system through a new drier in the charg-
ing manifold line. A 16 cubic inch drier is
sufficient for this purpose.
Page 7
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