4 Commissioning [specialist]
2020/10
997655810x-mub-en – V08
13
Airstop
The Airstop with manual vent valve is used to vent the solar system.
To ensure a perfect venting of the solar circuit, the flow velocity must
be at least 0.3 m/s in the flow line.
Pipe diameter [mm]
Flow rate at 0.3 m/s
∅ outside
∅ inside
l/h
l/min
15
13
~ 143
~ 2.4
18
16
~ 217
~ 3.6
22
20
~ 339
~ 5.7
The air liberated from the solar fluid is collected in the upper part
of the Airstop and can be released at the vent plug [4.2].
WARNING
Danger of scalding due to escaping vapour!
The escaping medium can have a temperature of more than 100 °C and cause
scalding.
Carefully open the vent plug and close it again as soon as medium
escapes.
Venting the solar installation after commissioning
At the beginning, vent the solar installation daily and then weekly or monthly,
depending on the vented air quantity. Thus, an optimum operation of the solar
installation is ensured. Check the system pressure after venting and increase
it to the prescribed operating pressure, if necessary.
4.2
