English 
 6 
Safety requirements 
These instructions are intended exclusively for authorised 
professionals. All installation and wiring work on the controller must 
only be carried out in a zero-volts state. 
The opening, connection and commissioning of the device may only be 
carried out by competent personnel. In so doing, all local security 
requirements must be adhered to. 
 
The device corresponds to the latest state of the art and fulfils all necessary safety 
conditions. It may only be used or deployed in accordance with the technical data and the 
safety conditions and rules listed below. When using the device, the legal and safety 
regulations apposite to the particular use are also to be observed. Incorrect use will result in 
the negation of any liability claims. 
 
► The device must only be installed in a dry interior room. 
► It must be possible to isolate the controller from the mains using an all-pole isolating 
device (plug/socket or double pole isolator). 
► Before starting installation or wiring work, the controller must be completely isolated from 
the mains voltage and protected against being switched back on. Never interchange the 
safety extra-low voltage connections (sensor connections) with the 230V connections. 
Destructive and life-threatening voltages at the device and the connected sensors may 
occur. 
► Solar thermal systems can become very hot. Consequently there is a risk of burns. Take 
care when fitting temperature sensors! 
► For safety reasons, the system should only be left in manual mode when testing. In this 
operating mode, no maximum temperatures or sensor functions are monitored. 
► Safe operation is no longer possible if the controller or connected equipment exhibits 
visual damage, no longer functions or has been stored for a lengthy period of time under 
unsuitable conditions. If this is the case, place the controller and equipment out of service 
and secure against unintentional use. 
 
Maintenance 
  The system does not require maintenance if handled and used properly. Use a cloth 
moistened with soft alcohol (such as spirit) to clean. Do not use cleansers and/or solvents 
such as trichlorethene. 
  As none of the components relevant to accuracy are under loads when used properly, 
they have a long service life without much drift. The unit thus does not have any adjustment 
options. No adjustments are needed. 
  The design characteristics of the unit must not be changed during repairs. Spare parts 
must correspond to the original spare parts and be as good as new.