4 Commissioning [specialist]
2016/05
997655910x-mub-en
–
V07
11
4
Commissioning [specialist]
Please observe the following safety instructions regarding the commissioning of the station:
WARNING
Risk of burning and scalding!
The valves and fittings can heat up to more than 100 °C. It is therefore not
allowed to flush or fill the installation when the collectors are hot (intense solar
radiation). Please note that hot solar fluid leaks from the pressure relief valves
in case of too high system pressure! During venting, solar fluid may escape as
vapour and cause scalding!
Only flush and fill the installation if the collector temperatures are below 70 °C.
NOTICE
Risk of frost!
It often happens that the solar system can not be completely drained after flushing. There is
thus a risk of late frost damage when flushing with water. Flush and fill the solar installation
therefore only with the solar fluid used later.
Use a water and propylene glycol mixture with maximum 50% of propylene glycol as
solar fluid.
NOTICE
Note regarding the commissioning sequence
During commissioning, fill the heating circuit first and the solar circuit afterwards.
This guarantees that heat that may possibly be absorbed by the collectors during
commissioning can be dissipated.
NOTICE
Note regarding the expansion tank
To prevent that dirt particles of the solar system are washed into the expansion tank, some
manufacturers recommend to disconnect the expansion tank from the solar circuit during
flushing and filling. Please observe the instructions of the manufacturer on this topic.
