HVAC CORE EPA
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What is the maximum percent by weight that a cylinder may be filled?
TO avoid the possibility of a hydrostatic explosion,refrigerant cylinders should never be filled above 80% of the container capacity (by weight)
What can happen if a cylinder is overfilled?
Extremely high pressure generated by expanding liquid in an enclosed space (hydrostatic pressure) could cause a refrigerant tank to rupture with extreme violence.
List three methods for measuring the fill level of a recovery cylinder.
Fill -limit devices,often a part of the recovery machine,vary and include floats,thermistor type sensors,and weighing scales
How often must reusable cylinders be hydrostatically tested?
Never use refrigerant cylinders unless they have been properly tested at least once every five years
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