Safety instructions For your safety Please follow these safety instructions closely to prevent accidents and mate- rial losses. Safety instructions explained Danger Incorrect work on the system can Danger lead to life-threatening acci- This symbol warns against the dents. risk of injury. Work on electrical equipment must only be carried out by a Please note...
Introductory information Commissioning The commissioning and matching up of the control unit to local conditions and the structural characteristics of the build- ing plus the instruction of the user in operating the system must be carried out by your heating contractor.
Operation Operation Controls °C OK key; to confirm your selection Cursor keys or adjustment To adjust values Symbols line To change from the scanning level to the setting level To terminate a value adjustment in progress Cursor keys To scroll through the menu To the right, underneath the symbols line on the display, you will see which keys you can operate to make adjustments...
Operation Operation (cont.) Symbol Permanent display Flashing Fully functioning system — Relay 1 ON — Â (solar circuit pump) Relay 2 ON — Ã Set DHW temperature Collector cooling function, È reached return cooling enabled Frost protection active Failed to reach minimum col- Ç...
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Scanning options Displaying actual values With keys / , you can scan the follow- ■ kWh – Energy in kWh, if a heat meter ing actual values, subject to the system is active equipment level: ■ MWh – Energy in MWh, if a heat meter ■...
What to do if... The solar thermal system does not start Cause Remedy The solar control unit MCB has respon- Contact your local heating contractor. ded. Power failure After power has been restored following a failure, the solar control unit returns into operation automatically.
¨ flashes. Applicability Applicable for the Vitosolic 100, type SD1 Part no. 7418 199 Your contact Contact your local contractor if you have any questions regarding the maintenance and repair of your system. You may, for example, find local contractors on the internet under www.viessmann.com.
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