IceTech CD 50, Руководство по обслуживанию

Страница: 33 / 37

Granular Ice Technical Service Manual
33 COD: IQ02_404MTIN.DOC
return line to the compressor should be covered in frost right up to the weld). If high-pressure
manometer is connected do not disconnect until you stop the machine and pressures have
stabilised. Check that a large amount of gas has not been lost in connecting/disconnecting
manometers, and use the shortest hoses you can find in H.P.
•
Any gearbox oil leaks?
NOTE:
Newly installed electromechanical control devices will suffer variations in their adjustment
caused by the machine’s own functioning. Once a second adjustment of these devices is carried
out, this should be good for several years. It is recommended, however, to check these devices
yearly, this is best done between October to April.
SAFETY TRIP (CIRCUIT-BREAKER) IN NEW MACHINES WILL SWITCH OFF THE
MACHINE DUE TO ONE OF THE FOLLOWING:
•
Ambient temperature is below 5ºC
•
Water temperature is below 5ºC
•
Evaporation temperature is below -20ºC
•
Cooling temperature below +30ºC
•
Refrigerant charge slightly low
In the first three cases, so long as temperatures do not drop below 3ºC (machine limit), re-adjust
fan pressostat to 42ºC and check that by-pass opens at -21ºC. In the last two cases bypass will
open and close very often. Adjust bypass, fan pressostat and add refrigerant if necessary.
Gearbox current consumption should be between 1.9A (min) and 2.6A (peaks) with an average
2.2A. Safety trip will work at 2.4-2.6A and switch off the machine immediately.
If the machine is over 2 years old, also inspect the auger, bearings, and grease on bearings.
In case of excess current consumption, you can verify that the problem is in the gear-box by
either physically detaching gearbox and motor from auger and checking current consumption, or
by removing only the brown wire which provides current to the compressor.