Marco Marco 1000680, Руководство по обслуживанию

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Service manual April 2017 Uber boiler
3.3.2 Temperature Calibration :
The flow rate must be calibrated before the temperatures as a low flow rate will effect
temperature readings. The thermometer used must be calibrated each day by R&D, who will
sign the test bench form.
The thermistors should be calibrated between 93-96°C. When the tank is full press Boost
and set to 95.5°C, and leave it pumping/circulating for several minutes to ensure an even
temperature throughout the tank. Now press all 4 buttons to enter calibration mode.
Go to option 2 to first calibrate the Font thermistor. hold the wire thermometer probe under
the spout about 10-20mm and set it to note the max reading, now dispense about 1L of
water and adjust the offset until the current reading matches the max temp recorded on the
thermometer. It is important to allow time for the probe to heat up to give the true max
reading so pour slowly at first and then faster.
While in calibration mode the tank will not heat so it will be slowly dropping in temperature so
you must act quickly when setting your offset to match the max temp reading.
The font thermistor is far more sensitive than the tank thermistor, since it is now calibrated
you can use it to set the tank temp. There is a temperature drop of 0.5°C between the tank
and font outlet (i.e. the tank is always 0.5°C hotter). While in calibration mode you can note
the current font temp readout and quickly scroll back to option 1 to set the tank temperature.
e.g. if your calibrated font temp is 95°C then set your tank to 95.5°C.
If either thermistor offset is greater than +/-1°C then the thermistor should be replaced and
recalibrated. If the font thermistor is out of range, it must be replaced before calibrating the
tank temperature.
Scroll to the “Save & Exit” option and press Time to Save.