ITV SPIKA MS 1000, Руководство по обслуживанию

Страница: 13 / 42

SERVICE MANUAL SPIKA SERIES
13
4. SEQUENCE OF OPERATION UNDER COUNTER MODELS (NG)
Initial Start-up:
It’s recommended that the first time the machine is started (or the water tray
has been emptied) it begins with the harvest sequence to ensure the water tray is filled.
Freeze sequence: The compressor is energized. The timer G2 de-energizes the hot gas valve,
so the evaporator begins to freeze. The timer G2 energizes the water pump so the water
circulates from the water tray to the upper distributor, flowing through each cube cell, where it
freezes.
Harvest sequence: The compressor will continue energized. The timer G2 energizes the hot
gas valve during a certain time. The timer G3 at the same time energizes the water inlet valve
during a certain time to fill the water tray with the appropriate quantity of water. The ice slab
slides off the evaporator and into the bin. After this, the freeze sequence starts again.
When storage bin is full the stock thermostat detects a low temperature and the machine shuts
off at the end of the freeze sequence. The ice machine remains off until enough ice has been
removed from the storage bin and the stock thermostat doesn’t detect this low temperature.
5. SEQUENCE OF OPERATION - MODULAR MODELS (MS)
Initial Start-up: The pump and the drain electro valve are energized during 30 seconds to
empty the water tray preventing the scale build-up in water. Then the pump and the drain
electro valve are de-energized, and the water inlet valve is energized filling the water tray until
the water level sensor detects the water reaches the appropriate level. Then the freeze
sequence starts
, opening first during 5” the hot gas valve to equilibrate.
Freeze sequence: The compressor is energized and the water pump is energized after 30
seconds. The water inlet valve is also energized at the same time that the water pump to
replenish water level and then de-energized. The compressor and water pump will continue
energized until the thickness sensor detects the thickness of the ice slab is the appropriate.
Then the harvest sequence starts.
Harvest sequence: The compressor will continue energized. The hot gas valve is energized
throughout the harvest phase to divert hot refrigerant gas into the evaporator. The water pump
and the drain electro valve are energized during 45 seconds to empty the water tray and