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Ice cubes production
The timer, in the first phase, starts up the pump and the utilizer
units, as described in the scheme of the previous page.
Timer
Evaporator
thermostat
Pump
Utilizer
Unit
Some minutes after the beginning of the ice production phase,
due to the refrigerant in expansion in the coil, an ice layer starts
to form inside the cups; the evaporator thermostat, perceiving a
drop in temperature of the evaporator, starts the timer, in order
to complete the ice production phase.
Defrosting
The timer, once reached the set up time, simultaneou
sly
commutes three contacts, letting the defrosting phase begin.
Evaporator
thermostat
Timer
Hot gas
valve
Water-inlet
valve
(Evaporator)
The pump is stopped and also the spray noozles stop; on the
contrary, the hot gas valve is started in order to pipe the
refrigerating fluid (overheated) directly to the evaporator.
The water inlet valve opens and allows the water to flow from
water mains into the basin.
The evaporator thermostat, perceiving a temperature rise (due
to the circulation of hot fluid), starts up the timer again, so to
complete the defrosting phase.
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