The Display - JEM Glaciator X-Stream User Manual

HEAVY FOG GLACIATOR

THE DISPLAY

Two LED displays are used in the Heavy Fog Glaciator to show status and
control information. The left display shows all information for the fog
generation functions of the machine, whilst the right display shows the
information for the Ice functions.
Located below each display are 4 function keys that can be used to control
the display and the settings on the machine. The functions of the keys are
shown in the following drawing.
MENU ENTER
KEY KEY
The message displayed will depend on the operating mode of the machine at
the time. However, pressing the menu key at any time will cause the display
to go into the edit mode, allowing the operating parameters to be adjusted.
After approximately 15 seconds since the last keystroke, the display will
leave the edit mode and revert to displaying the current status information.
Pressing the menu key will display the current menu function, whilst pressing
and holding will scroll through the available menus. All keys work the same
way, and can be operated with single keystrokes or held down to force the
display to scroll through the available options/values. The scrolling function
comes into operation 1 second after the key is pressed.
When the user has set the required menu function, pressing the enter key
will display the current value associated with that menu item. The user can
now use the UP/DOWN keys to move through the available options/values
either by single keystrokes or by scrolling.
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USER
GUIDE
UP KEY DOWN
KEY
HEAVY FOG GLACIATOR
EVAPORATOR FAN CONTROL
When the current firing cycle is over, the evaporator fan will run at maximum
speed for 3 seconds to clear the remaining smoke from the evaporator
compartment. To allow for machines with ducting on the output, a special
extended run mode can be selected. By setting the special function switch 1
(s1) to ON (down), a 6 second run-on time for the evaporator fan can be
selected. Remember that the density setting for ducting is 'Lo', since this
gives the greatest fan speed for any given fog output level.
The evaporator fan may run at other times to assist in the control of the
refrigeration system.
CONDENSER TEMPERATURE CONTROL
The radial blowers used to cool the condenser unit are powered from a 2
speed relay which is controlled by the machine's microprocessor. The speed
of the fans is determined by the temperature of the condenser unit and the
thermal load on the evaporator. The control software uses a timer to prevent
short-cycling of the speed controller. Under almost all ambient conditions,
the fans should run at low speed when the machine is idling, but when fired,
the system will switch to high speed. The high speed running will continue
after the end of the current firing cycle, and is timed according to the
temperature of the condenser unit.
The filter material fitted to the condenser unit can be changed by removing
the four screws securing the condenser top cover. The guidelines for filter
change/cleaning are:
Normal conditions:
Inspect and clean/replace every 250 hours.
Severe conditions:
Inspect and clean/replace every 150 hours.
USER
GUIDE
13