Control Elements and Safety Devices
Operation
Only by
of ice machine
operating switch
1.
When switching off the machine by the operating
6. Safety Device for the Compressor:
switch, the drive motor of the freezing unit continues
A built-in or external motor protection guards the
to run for further 3 minutes. Thus the new ice
compressor motor against overheating
produced by the re-evaporation will still will be removed,
and excessive drawing of current.
preventing a possible freeze-up of the machine.
When the machine is switched off by the
7. Overload cut-out
emergency cut-out or the main switch
All other motors are also protected against
provided at site, the after running is out of
overload by overload cut-out devices or
operation. Therefore a period of approx.
motor protection switches.
30 minutes should elapse for safety reasons,
before the machine is switched on again.
8. Capacity control
The capacity control protects the evaporator and
2. Cut-out of machine when storage is full:
the compressor against over burdeninhg by too
low ambient- or water temperature.
a) Light barrier in the ice hose:
The light barrier switches the machine off, when the
storage is full and the ice mounts into the ice hose.
9. Crankcase Heating
Automatic restart after removal of ice.
As a crankcase heater is installed, the machine
must be switched on by the main switch
b) Heated light barrier:
at least 1 hour in advance to allow pre heating.
For larger cold rooms we recommend a heated light-
barrier to switch the machine off when the bin is full.
This light barrier has been chosen by us for these
10. Phase sequence Relay
particular conditions. Please contact us.
The phase sequence relay switches off the
machine,if the phases are not connected in the
c) Other cut-off devices:
correct order. (see electrical connection)
Also when the ice is produced directly in an ice car,
a cut-off device should be installed.
11. Low voltage relay
Please contact our service department.
The relay cuts the machine off, if the voltage
drops under the tolerated 10% low voltage.
3. Control lamps:
white:
Machine operates and produces ice
12. Automatic water drain
yellow:
The ice bin is full or the Compressor
In order to reduce nucleation in stagnant water,
is switched off and the freezing
a solenoid valve closes the water inlet as soon
units run for further 3 minutes. See above.
as the machine is out of operation.
red:
The lamps indicate, where a failure
Another opens the water drain thus emtying the
has occured.
water chamber and the freezing unit.
4.
Water-Level Control
The water-level control switches the machine off
13.
Ice jam switch on the ice outlet
in case of water shortage. After-running as
This security switch switches off the machine,
described under 1 (Control lamp lights up).
should the ice jam in the ice hose.
Automatic reset, when the water supply has been
(e.g. if the light barrier fails)
restored.
After the failure has been found and the ice outlet.
has been reinstalled, the machine switches on
again automatically.
5. High/Low pressure switch
The machine is switched off, if there is e.g.
excess pressure in the refrigeartion system
caused by too high ambient temperature or soiled
condenser, or if the pressure is insufficient
due to refrigerant loss. (Control lamp lights on)
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