Refrigeration technology (refrigeration plant, heat pump, and split air conditioner)
© robatherm 79
Connection of the refrigerant line
WARNING
Eye injury from refrigerant-filled coils due to pressure
When opening the piping to prepare for brazing of refrigerant-filled coils, nitrogen
escapes at approx. 5-10 bar. This can result in small flying parts and chips that can
cause injury to the eye.
• Wear protective goggles with side protection
Before connection, check the coils and lines for tightness; i.e., whether the factory protective gas
filling is still under pressure.
In the case of direct expansion coils, after opening the coil connection lines, the nitrogen inert gas
charge must escape with a hissing noise. Otherwise, there is a leakage.
The piping outside the AHU must be insulated to be diffusion-tight.
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