RELEASE NOTE C (1)
O43002D Rev. 01 06-04-1999
General information on the heater control algorithm
Due to an advanced energy controlled technology, the boiler temperature will continuously
change in order to adapt the use of the machine. This assures a very accurate brew
temperature of 90 C in the centre of coffee cake. The instant water temperature can be set
in 3 temperature ranges by adjusting the amount of cold water injection (see the above
description). Therefore the setting of a boiler temperature is not an issue on this machine.
By means on a VIDTS record, a complete set of parameters can be changed in order to
achieve a different brew temperature, if required. Changes to these parameters requires an
in depth knowledge of the algorithm and the heat/energy physics. Changes to these
parameters must always be confirmed and tested by Tech. Ops. at Wittenborg.
The water tank temperature control algorithm is self-calibrating. It will
automaticautomatically compensate for fluctuations of the main power supply voltage and
inlet water temperatures. By sudden and big fluctuations 1-2 beverages too cold or too hot
may be expected, but the machine quickly recovers from this condition by it self. Supply
voltage fluctuations of 30-50 V and Inlet water temperature fluctuations of 10-20 C
°
is
considered BIG fluctuations. Fluctuations below these limits should give no problems.
By installing a new machine correct temperatures can be expected after 30-45 minutes and
10 to 20 dispensed beverages.
Yours sincerely
Wittenborg A/S
Kim Dalgaard Andersen
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