Technical data

Installation, use and Maintenance manual - ed. 04/14 18
Dip-Switch 5 – 24hr Dry Cycle: The cooler will dry out for 30 minutes during every 24
hours of continuous operation. This can be applied to in certain circumstances to improve
the hygiene of the cooler
Dip-Switches 6 and 7 – Maximum speed settings
This enables the top speed of the fan to be limited. This may be used to either reduce
overall capacity or reduce noise. The standard motor used is a double wound 4 pole/6pole
motor.
Speed
Dip –switch default
6 OFF - 7 OFF 6 ON - 7 OFF 6 OFF - 7 ON
5 1390 1200 1000
4 1220 1090 960
3 1050 980 910
2 870 870 870
1 600 600 600
Dip-Switch 8 – Auto Stop Conditions
In ‘AUTO’ mode the default condition is the cooler remains at Speed 1, ‘VENT’ mode when
the set point has been achieved. If this switch is enabled then the cooler will shut down
completely.
3.3.3 – Water probes
The four water level probes are base on
magnetic floats which operate reed
switches. They provide the input for the
following functions.
At start-up the low level probe is checked –
if it is covered then the cooler drains fully
prior to starting the water cycle.
When in ‘COOL’ mode water enters the sump, with both inlet valves open, until the high
level probe is covered. Inlet valve V1 then closes. The water then evaporates until the
Low Level probe is uncovered. Valve V1 then opens (V2 is already open) and fills to High
Level when V2 closes.