RVR Energy Technology MICROMAT EC 45, Instruction For Usage, Installation & Commissioning, Page: 48 / 56

48
18.5 setting domestic
hot water temperature
E n e r g y T e c h n o l o g y
Ltd.
18.6
service button/setting heating output
pump speeds and minimum mixed
flow temperature
A) With HWS sensor in/on DHW Calorifier
• Set desired stored hotwater temperature by using the “green” potentiometer on the boiler control panel. This
arrangement will give the potential to charge hot water continuously (24 hour/day) with priority over the heating
demand. This arrangement is recommended only with high/quick recovery type caloriflers.
B) With cylinder thermostat in/on DHW Calorifier
• Set desired stored hot water temperature by the adjustment of the cylinder thermostat. With this arrangement
the “green” potentiometer on the boiler control panel has no function. With this arrangement time control of
hot water charging is possible by installing a time switch in series with the cylinder thermostat, but hot water
charging always takes priority over the heating demand.
The service button is located adjacent to the Dip switch block (bottom right hand of control panel) and has a number
of functions
a) Setting maximum output to heating.
The output to heating may be limited if required and may be set between 20% and 100%, by performing
the following:
i) Press “red” reset button once.
Press service button once.
Screen display will show “Mxhea”???>??%
The figures to the left of the “>” symbol are the current settings for maximum heating output as a percentage
of the maximum output of the boiler
ii) To change the output, turn the “red” potentiometer and the figures to the right of the “>” symbol will
change. Set the required % output by adjusting the “red” potentiometer. - - equals 100%.
iii) To “store” the new setting; press the service button once.
iv) If no further adjustments are required then set “red” potentiometer back to it’s original position as this
affects the compensation slope setting if compensation is active.
b) Setting maximum pump speed. (Normal setting 100%)
If it is required to limit the maximum speed of the in built boiler pumps then this may be done by the following:
i) Press “red” reset button once.
Press service button once.
Press “red” reset button twice.
Screen display will show “Mx pum”???>??%.
ii) To change maximum pump speed (not recommended, normally left at - - (100%) follow procedure as