4 Commissioning [specialist]
2020/09
9976x0210x-mub-en – V01
9
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 may heat up to more than 100 °C. Therefore, do not clean
or fill the system when the collectors are hot (intense sunshine). Please note that
hot solar fluid will leak from the safety valve when the system pressure is too high!
During venting the solar fluid may escape as vapour and result in scalding!
Flush and fill the system only when the collector temperatures are below
70 °C.
ATTENTION
Risk of frost!
It often happens that solar systems cannot be completely drained after flushing. Thus, there
is a risk of frost damage later on when flushing with water. Therefore, only use the solar fluid
used later on for flushing and filling the solar installation.
Use a water/propylene glycol mixture with max. 50% of propylene glycol as solar fluid.
ATTENTION
Note regarding the commissioning sequence
During commissioning, fill the heating circuit first and the solar circuit afterwards.
This guarantees that the heat possibly absorbed by the collectors during
commissioning can be dissipated.
