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10 Cards in this Set
- Front
- Back
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Cooling the recovery system will? |
Lower its pressure and speed up the recovery process or removal of refrigerant charge from a system |
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Heating the cylinder will? |
Also speed up the recovery process as this will increase the pressure differential between the tank and the system c |
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Compressors or recovery machines rely on the flow of refrigerant thought the compressor for cooling and may over heat when? |
Drawing a deep vacuum |
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The motor winding of a hermetic refrigeration compressor could be damaged if energized under a deep vaccuum |
Care should be taken to avoid energizing these compressors when refrigerant is being recovered |
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Before making a major repair to an R 410A containing more then 200 lbs of refrigerant must be evacuated to ? |
10 inches of hg vacuum |
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The refrigerant receiver will typically be found where? |
In the liquid line at the outlet of the condenser |
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In the suction line at the outlet of the evaporator suction line accumulators can be found where ? |
Between the evaporator and the compressor |
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If a compressor burns out the oil should be tested for |
The presence of acid |
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It may be nessassary to break the vacuum by increasing the pressure. With ? |
Nitrogen to counteract freezing of moisture |
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Using to large of a vacuum pump will cause |
Water to freeze |
