Bosch FM443/CMS 910 Operating Instructions Manual page 11

Operation Mode
FM443/CMS 910
Different operating modes
Press manual ON ("day mode" key) to set the solar control unit to
"permanent on".
Press automatic mode ("AUT" key) to set the solar control unit to
automatic mode.
Press manual OFF ("night mode" key) to switch off the solar control
unit.
Input range
Automatic
OFF
ON
Manual ON
No control functions are involved when the circuit is running in this
mode; however, the solar thermal system will cut out if either the
collector array or the cylinder(s) exceed(s) the maximum
permissible temperatures.
In constant mode:
– The hot medium of the solar thermal system (e.g. glycol:water
mixture) can flow from the cylinder to the collector array.
– The cold medium (< 0 °C) of the solar thermal system
(e.g. glycol:water mixture) can flow from the collector to the
cylinder – the cylinder temperature drops, so that reheating
must start, for example.
USER INFORMATION
The "Manual ON" mode returns automatically to automatic mode
after 30 minutes.
Functions of the FM443/CMS 910 | 11
Factory setting
Automatic
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