Refrigerator refrigerant leak detection
Refrigerant Leak Detection – Handling refrigerants: safety precautions
Although the common refrigerants (RI2, R22, R502 etc.) are not considered hazardous, it must be remembered that all refrigerants are heavier than air and will replace air in a confined space very quickly. This can be dangerous; if the air does not contain at least 19 per cent oxygen, loss of consciousness may result.
When testing [...]
Refrigerant Leak Detection – Pressure Leak Testing
This is carried out on new system installations or when a plant has been discharged of refrigerant prior to repair. It involves the use of oxygen-free nitrogen (OFN) which is a high pressure gas. This is used to obtain a higher pressure than that of the refrigerant in normal ambient temperatures. This pressure should be [...]
7Nov2009 | admin | 0 comments | ContinuedRefrigerant Leak Detection – Test pressures
During normal service operations a leak test does not entail a prior evacuation of the system unless the system is contaminated or the refrigerant has been completely discharged. It is essential however, that a minimum of 30 psig (pounds per square inch gauge) or 2 bar exists in the system when testing for leaks. If [...]
7Nov2009 | admin | 0 comments | ContinuedRefrigerant Leak Detection – Dye Systems
Some plants may be charged at the time of installation with a refrigerant which contains a coloured dye to provide a visual indication of leakage. Systems using refrigerant containing a dye must always be liquid charged. This is most important when adding refrigerant to a system after a considerable loss due to leakage.
The dye tends [...]