Commissioning; Filling The Solar System - AOSmith MVI 103 Notice D'installation Et D'utilisation

4
4.1 Filling the solar
system
4.1.1
MVI pompstation / MVI pump station / station de pompage MVI

Commissioning

Observe the following safety instructions regarding the commissioning of the station:
Attention: Risk of burns and scalding!
The valves and fittings can heat to temperatures of more than 100°C due to
the solar fluid. Therefore, do not clean or fill the installation with the
collector's heated (intense sunshine).
Observe that hot solar fluid can leak from the safety valves in case of too
high system pressure!
Attention: Risk of frost!
It often happens that the solar system cannot be completely drained after
flushing. Thus, there is a risk of frost damage when flushing with water.
Therefore, do only use the solar fluid used later to flush and fill the solar
system.
Use a water and propylene glycol mixture with max. 50% propylene glycol
as solar fluid.
Note regarding the commissioning sequence
When putting the system into operation, first fill the heating circuit and then
the solar circuit. This guarantees that eventually absorbed heat can also be
dissipated.
The fill and drain valves required to flush and fill are integrated in the station. Make sure not
to wash dirt particles that may be present in the solar system into the expansion vessel.
Isolate the solar expansion vessel from the solar circuit during flushing and filling with the
valve between the solar expansion vessel and the security group and only use flush and fill
stations with fine filters.
Note:
The system must be clean and free of air and contaminants to ensure the
perfect functioning of the system.
Non drain back system
H
G
C
I
1. Disconnect the power supply. The pump may not run during filling.
2. All the connections on the roof (collectors) must stay closed.
3. Isolate the expansion vessel (F) by closing the valve.
4. Close the valve (C) on the right side of the pump.
A
J B
E
C
D
F
59