Arctiko SF SERIES, Руководство по обслуживанию, Страница: 11 / 48

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The cooling system is evacuated with a two-stage vacuum pump for at least 30 minutes.
Both from the pressure piping and process piping.
Blow the system with nitrogen, both from the suction and the pressure side.
3e. Changing the dryfilter
The dryfilter must pick up moisture in the system during operation and function as the ca-
pillary tube in front of the capilary tube, in order to avoid clogging. Clogged filter or capillary
tube causes a pressure drop, by this the filter becomes colder and ice will block the system.
The compressor is overloaded with a possibility of crash.
The dryfilter is placed after the condenser outlet, immediately before the capillary. Any
opening of the cooling system, dryfilter change to ensure the function and lifetime of the
freezer.
It is therefore recommended always to order a new filter drier, along with a new service cy-
linder with cooling agent.
To prevent moisture from penetrating during the repair, the drying filter must not be open
for more than 10 minutes.
After evacuation and blowing with nitrogen, the tubes must be cleaned on both sides of the
filter drier, before cutting. By doing this the pipe ends are free from impurities and metal pie-
ces and ready for soldering.
Cut off the pressure pipe close to the filter with a pipe cutter.
Cut off the capillary tube with a capillary tube scissors.
It is recommended to use a special tongs to create a wave on the capillary tube which en-
sures the correct positioning in the filter.
Process pipe and pressure
tube fitted with a valve.