Equator 375 service manual Replacing the Filter Drier, The following procedure should be used

2.2. Replacing the Filter Drier

Some moisture and impurities will always be accumulated in the filter drier, both from residue left in the system after installation and from contamination given off by the compres- sor, pipe system and refrigerant. When repairs are made to the refrigerating system, the filter will often be unable to absorb the extra contamination which results, and ice blockage and contamination of the capillary tube can result.

It is therefore important to note that REPAIRS MADE TO THE REFRIGERATING SYSTEM HAVE NOT BEEN CORRECTLY CARRIED OUT UNLESS THE FILTER DRIER HAS ALSO BEEN REPLACED.

The following procedure should be used:

Open the refrigerating system by breaking off the capillary tube approx. 5cm after the filter drier (use special-purpose pliers or capillary tube scissors).

Discharge the refrigerant. In case of recovery of refrigerant - see Section 2.1.1. + 2.1.3.

Cut out the filter using a pipe cutter.

THE FILTER MUST NOT BE SOLDERED OFF, AS ANY MOISTURE COLLECTED IN THE FILTER WILL EVAPO- RATE BACK INTO THE SYSTEM.

Open the system at the process pipe and blow dry nitrogen

(N2) through the system. In case of recovery of refrigerant - see Section 2.1.1. + 2.1.3.

Install an outsize service filter (as specified in the spare parts list).

Ensure that the capillary tube does not touch the compressor when the filter is positioned.

Should this happen, the flow through the capillary tube can be reduced (moisture barrier). This problem can be confused with slight under-filling of the system.

This filter drier has been installed correctly. Special-purpose pliers have been used to make a wave in the capillary tube.

The filter drier shown here has been installed incorrectly, with the capillary tube touching the filter net. The end of the tube is not free, and the resistance is thus increased. The tube will become completely blocked after a period of use. Special- purpose pliers should therefore be used.

Here the capillary tube has not been inserted far enough into the filter. This will increase the risk of the tube becoming plugged with flux or silver during soldering. The risk of the tube becoming plugged during operation is also high, as circulating particles will be led directly down into the capillary tube. Special-purpose pliers should therefore be used.

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