ICE TECH SS / SP Technical Service
Manual
5
which closes the circuit with 3. A different blue wire goes to 2 on terminal G1 which at this moment
is connecting 1 and 4. A red wire connects bin thermostat T1 and micros G1 and G2 which close
the circuit with 4 and provide current via G1 to the timer G.
At this point the following are connected:
•
COMPRESSOR (S)
•
WATER INLET VALVE (P)
•
HOT GAS VALVE (Q)
•
TIMER MOTOR (G)
After 2 to 4 minutes micros G1 and G2 will open and close circuits 1-2. Via terminal 2 on micro
G2, current reaches the pump. Circuit 4 on micro G2 which provides current to the hot gas valve
(Q) and water inlet valve (P) will be interrupted. Since the thermostat is between 1 and 3 the timer
will receive no current. The compressor continues switched on.
Air-cooled machines have a fan (R) which is controlled by the pressostat (F). In water-cooled
models without pressostatic valve, pressostat (J) opens and closes the condenser electrovalve
(K).
Evaporator temperature decreases until the cycle thermostat (T2) set point is reached, at this
temperature circuit 1-2 will be closed and timer motor (G) will switch on.
Once the cycle is over, the pins on the timer wheels will force the micros to change circuits,
stopping the pump and opening the hot gas valve and water valve. The combined effect of hot
gas and water sprayed on the top of the evaporator will release the ice cubes and change the
position of the cycle thermostat (T2).
The ice production and defrosting cycle will continue until the ice storage bin is full, at which point
cycle thermostat (T1) will disconnect the machine, but never during a cycle, but at the beginning
of the defrosting stage, since during the production cycle, current will reach the pump via terminals
1-2 of micro G1.
The machine will remain disconnected until the level of ice in the bin drops below the thermostat
because of ice consumption. At this point the machine will connect automatically.
