Technical data

50
STRATA1
19.5 Setting domestic
hot water temperature
19.6 Service button/setting
heating output,
pump speeds and minimum
mixed flow temperature.
A) With HWS sensor in/on DHW Calorifier.
1) 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 calorifiers.
B) With cylinder thermostat in/on DHW Calorifier.
1) 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 in a) ii)-iv) above.