Ice Frost Operator’s Manual
Managing the Bowl Levels
When one of the two level probes fails to detect the presence of liquid in the bowl, the Fill solenoid valve is activated to refill the correct level.
The probes relating to each bowl are completely independent, therefore the following situation will occur:
Bowl Level Probe | Bowl Level Probe |
Safety Probe Input | Safety Probe Input |
Bowl Fill Solenoid | Bowl Fill Solenoid |
Bowl Level Probes Uncovered Bowl Fill Solenoids = ON
| FIGURE 34 |
Bowl Level Probe | Bowl Level Probe |
Safety Probe Input | Safety Probe Input |
Bowl Fill Solenoid | Bowl Fill Solenoid |
Bowl Level Probes Covered Bowl Fill Solenoids = ON
FIGURE 35
NOTE 1: The level/s refill phase must take place within a maximum time lapse which is controlled by the (controller (see Alarms chapter).
NOTE 2: The level/s refill phase may only concern one of the two bowls, but it will maintain the same features.
NOTE 3: It is essential that the safety probes are covered for the bowl/s filling phase to take place.
Safety Probes (only for ICE FROST GENERIC Pre-mix)
In addition to the two level probes relating to the two bowls (see FIGURE 32 through FIGURE 35), the μZ4LP system also monitors the two ‘safety’ probes designed to monitor the presence of liquid in the external tanks.
The monitoring of the probes (covered/uncovered) is only active during the bowl loading phase. It follows, then, that a lack of liquid in the tanks during the
If: | Safety probe inputs uncovered when bowl fill solenoids = OFF - | no signal |
Example of how the safety system works:
Supposing the safety probe is uncovered and the solenoid valve is
Then the level probe located in the bowl is uncovered. The solenoid valve is enabled to allow the bowl to fill correctly.
3 seconds after the activation of the solenoid valve, the safety signal is activated as the probe has been identified as uncovered. The fill solenoid valve is deactivated and the buzzer emits an intermittent signal lasting 6 seconds.
© | - 19 - | Publication Number: M620919596OPR |