SECTION C - REFRIGERATION SYSTEMS AND SERVICE
*IMPORTANT WARNING
THE INSTRUCTIONS IN THIS MANUAL SEEK TO ACCOMPLISH THE MONTREAL PROTOCOL ESTABLISHED
REQUIREMENTS, BY WHICH THE MANUFACTURE AND USE OF THE PRESENT CHLOROFLUOROCARBONATED
REFRIGERANT SHOULD BE COMPLETELY DISCONTINUED. PRACTICAL KNOWLEDGE ON INSTRUCTIONS USE
FOR REPAIRING HERMETIC REFRIGERATION SYSTEMS IS REQUIRED AS WELL AS TRAINING ON THIS AND ON
THE USE OF RECOVERY AND RECYCLE EQUIPMENT, AND KNOW AND UNDERSTAND ALL THE LAWS (LOCAL
AND INTERNATIONAL LAWS) RULING CHLOROFLUOROCARBON (CFC) REFRIGERANTS MANIPULATION.
NOTE: ATLAS INDUSTRIAL S.A.
doesn’t allow the use of recovered refrigerant in the service or our products for
repairs covered or not by the guarantee, nor products covered by service contracts. For this reason, only new refrigarant
or manufacturer remanufactured refrigerant will be used, as per the new specifications.
SAFETY INSTRUCTIONS
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CAUTION Compressor Tests:
When testing a compressor, be careful not to damage terminals. A compressor with
damaged terminal or grounded winding might expulse the terminal from its isolated box at the compressor operation. If
this happens, a refrigerant and oil mixture might be expulsed and inflamed if it contacts a heat external source (a flame,
heater, etc.). If there is air in the system when this occurs, a spark in the compressor shield could set on fire this
refrigerant and oil mixture.
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WARNING When loading hermetic systems:
Loading refrigerant excess in a refrigeration system can be dangerous.
If overload is enough to submerge the main motor and compressor parts into refrigerant liquid, a situation followed by
several circumstances may cause the compressor shield joints separations.
A hydraulic blocking prevents the compressor run. This condition is known as “blocked rotor”, the electric current
continues flowing through the compressor motor windings actually transformed into electric heater resistances. The
heat produced starts to vaporize the liquid refrigerant surplus and the system pressure increases rapidly. If the
compressor protector devices don’t work, the system pressure can increase much over the design limits. In such
conditions, the welded joint around the compressor shield might be separated with explosive strength releasing oil and
vapor from the refrigerant that might set on fire and cause serious injuries to people around.
In order to eliminate this very uncommon but feasible danger, refrigerant shouldn’t be added to hermetic systems. If it
needs refrigerant, the existing load must be evacuated and re–loaded with the adequate measured quantity of refrigerant
specified for the system.
NOTE:
Fix an approved self - threaded line extraction valve to the process tube.
Connect the refrigerant recovery
system to the valve.
Run the recovery system, open the line extraction valve and allow the refrigerant pass to an
approved type tank.
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CAUTION
Always make sure the equipment is in good conditions, and follow the manufacturer instructions to avoid an
accidental hose breakage that might cause physical damage. Operate the system until 27 inches vacuum. Turn off the
system and allow settling for two minutes. If pressure remains under (0) pounds per square inch, disconnect the
equipment and start the work. If pressure is not under (0) pounds per square inch, repeat the indicated procedure until
all the refrigerant is emptied and the system maintains vacuum.
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