PIPEWORK
Pipework to and from the cooler should be suitable for:
•
Working fluid (guidance can be provided by Kelvion representative or pipe suppler)
•
Atmospheric conditions
•
Maximum operating pressure including relevant safety factor
Damage caused by incorrect installation will invalidate the
manufacturer’s warranty obligations.
Pipework to and from the coolers should be selected to suit the application and not the connection size of the unit. Pipework sizes should be selected to ensure
pressure drop does not exceed an equivalent of 2K at full load conditions.
Pipework should be supported independently from the cooler unit in a way that prevents the transmission of vibration to the units. A qualified engineer should
install the refrigerant pipework to a high standard of refrigeration practice. All pipework used must be clean and to refrigeration quality, all cuts should be made
using a pipe cutter, never a hacksaw, and care must be taken to remove all burrs and swarf.
Braze using silver bearing brazing rod and ensure that all joints are cleaned before brazing. During brazing care should be taken to ensure that all components
near joints should not be excessively overheated, a wet cloth should be applied where necessary. Dry nitrogen should be passed through the pipework during
brazing to minimise oxidisation.
WARNING!
Use appropriate PPE (personal protection equipment) during pipework, refrigerant charging and commissioning. During brazing ensure
the temperature of coils with vinyl coated fins does not exceed 300°F as toxic fumes would be produced .
When brazing and leak testing
are complete the suction line should be insulated with 3/4” thick Class ‘O’ insulation. The unit has been thoroughly tested during
manufacture however after on site brazing is complete all pipework should be pressure tested for leaks to maximum of 1.3 capacity pressure
Be aware of the below hazards during pipework and refrigerant charging:
IN THE EVENT OF INJURY, SEEK MEDICAL ATTENTION IMMEDIATELY.
It is the responsibility of the installer to ensure piping to and from the condenser is suitable for the application, although guidance from your Kelvion
representative can be provided.
Unless otherwise specified, twin section units should be connected in parallel to each other, not in series; failure to do so will result in excessive fluid pressure
drop and a corresponding loss in performance.
All pipework and fittings should be pressure tested upon installation completion in accordance with relevant regulations or legislations. Any pressure test should
not exceed the unit’s maximum operating pressure or the pressure rating of any safety devices.
Frost burns
Cuts or Wounds
Heat burns
Inhalation
