Idiomas disponibles
Idiomas disponibles
VHM 2.1 - 2.7
commIssIonIng InstructIons
Flushing and filling
For safety reasons, only carry out filling when the sun is not out or after covering the collectors.
Attention
Only use the foreseen antifreeze liquid (see list).
It may no longer be possible to completely empty collectors that are already filled. For this, in case of risk of frost, the collectors must be
filled with a water and antifreeze solution also for operation and pressure tests. Alternatively, the pressure test can be done with com-
pressed air and leak detection spray.
Operating pressure
The maximum operating pressure is 10 bar.
Air venting
The air must be vented:
•
at the time of commissioning (after filling)
•
4 weeks after commissioning
•
when necessary, e.g. in case of faults
Warning: Risk of scalding from steam or heat transfer fluid!
Operate the vent valve if the temperature of the heat transfer fluid is < 60°C. When emptying the system, the collectors must be cold!
Cover the collectors and, if possible, empty the system in the morning.
Heat transfer fluid check
Periodically (every 2 years) check the antifreeze properties and the pH value of the heat transfer fluid.
•
Check the antifreeze with a tester and change or replenish it if necessary!
•
Check the pH value with a measuring instrument (nominal value of pH 7.5 approx.): if it drops below the limit value of pH 7, change
the heat transfer fluid.
Collector maintenance
Once a year, visually check the collectors for any damage, dirt or leaks.
It is also advisable to do a check whenever the collectors undergo higher than normal stresses (e.g. strong wind gusts, heavy loads due
to snow, etc.).
Cod. 3541I450 - Rev. 03 - 02/2017
EN
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