Refrigerant charging onboard ship

  • Normally refrigerant in the liquid state is changed at the high-pressure side.
  • Weigh the bottle with a spring scale.
  • Connect the charging pipe between liquid valve of bottle and charging valve (ensure air is purged out the collecting cylinder).
  • Fully open bottle liquid valve, charging valve is still closed.
  • Close main liquid stop valve is outlet from condenser (or receiver) & run the compressor, so that system (compressor stop on  lp cut out) is starved of refrigerant - carry out short cycling.
  • Slowly open charging valve (avoid frosting on suction pipe). changing to be done in stages. After filling compressor is shut down & cooling water kept for some hour. (3/4 of sight glass).
  • Then air can be purged out from air vent valve of condensor.

Charging connection:
Liquid (blue) - between the receiver and Silva gel filter or through filter gas(red) - before the suction valve.

  • Silica gel filter has been replaced by the desiccant, which is a filter and depends on the type of refrigerant used
  • To purge charging line after charging refrigerant, valve 1&3 to be in close position and valve 2 to be open & run compressor.
  • We can also use a vacuum pump instead of an empty bottle to purge the charging line.
  • HP charging connection is provided between receiver and dryer (filter) or through a filter. LP charging connection is provided at the suction of compression. (generally avoided).


2 comments:

  1. This comment has been removed by the author.

    ReplyDelete
  2. Wonderful blog. incredibly informative Thank you for sharing that with me. Trimac Piping Solution thought it was fantastic.

    ReplyDelete

Powered by Blogger.