Cornelius ICE FROST - Manual (Page 21)

Ice Frost Operator’s Manual
© 2004-2006, IMI Cornelius Inc. - 17 - Publication Number: M620919596OPR
ELECTRONIC MONITORING
E
LECTRONIC
B
OWL
M
ONITORING AND
S
AFETY
S
YSTEM
P
RESSURE AND
L
EVEL
C
ONTROL
C
ARD
G
ENERAL
F
EATURES
The diagram shows the electronic pressures and levels
management system:
1. Safety valve.
2. Monitoring card for maximum limit exceeded probes.
3. Bowl 1 overpressure discharge relief valve solenoids.
4. Bowl 2 overpressure discharge relief valve solenoids.
5. CO
2
inlet solenoid valve.
6. Pressure and levels monitoring card.
7. CO
2
pressure switch.
FIGURE 31
In addition to the product level probes, each bowl is fitted with 2 further ‘overfull’ safety probes.
In fact, if the level probes should cease functioning and so the product begins to fill up the bowls, these
safety probes will transmit this information electronically to the monitoring card (2), which will then
disconnect the pressures and levels monitoring card (6).
The pressures and levels control cards have various functions, which are described below.
Via a micro-controller, the
μZ4LP allows the operator to manage the levels and the relative safety devices
linked to the two cold drink bowls. An electronic pressure switch card (amplified, linearized, and
compensated) is provided for monitoring the pressure of the gas used in the post-mix phase of the said
drink.
The Electronic Pressure Switch Card will have the following features:
• Independent level control for each bowl.
• CO
2
gas pressure reading.
• Acoustic warning signal in the event of a lack of liquid/s.
• Pressure maintained between two pre-set points by means of a relay.
The use of these mixed THT and SMD components makes it possible to maximize the services/
dimensions/quality relationship (better immunity to external troubles).
The ECU is composed of two main printed circuits:
• Power’ section including transformer, relay, and power supply.
• Logic’ section including (controller and level control circuiting).
1
2
3
4
5
7
6