IceTech CD 50, Service Manual

Page: 34 / 37

Granular Ice Technical Service Manual
34 COD: IQ02_404MTIN.DOC
In order to avoid damage to the gear-box, the safety trip is very sensitively adjusted and may
trip easily. You may teach the end user to re-connect the machine (by inserting a
pen/screwdriver through the front grille blades). This is best done after a one hour pause.
Should the machine trip on a regular basis (more than once a week), the end user must get in
touch with the service department.
9.1. Special advise concerning R-404 Refrigerant
•
R-404 is a mixture of 3 liquid-phase gases. On evaporating, the 3 component gases separate
•
Always use the liquid phase valve (at the end of condenser or accumulator) for refills and
purges.
•
When replacing a compressor, wash inside of circuit with a suitable s pump, dry with
nitrogen gas, REPLACE THE DRIER WITH ONE SUITABLE FOR R-404, which must also
have ANTI-ACID properties.
•
If you need to add oil, use one which is specific for R-404 (POE). If you are in doubt, contact
the machine manufacturer.
•
If there is a leak anywhere in the circuit where R-404 in the GAS phase, and a refill of over
10% is required, then ALL THE GAS IN THE CIRCUIT MUST BE PURGED AND THEN
REFILL AS DESCRIBED PREVIOUSLY (LIQUID PHASE VALVE)
•
When charging via low-pressure valve, do not start compressor immediately, allow about one
hour for liquid to gasify.