5 Maintenance [specialist]
2020/10
997655810x-mub-en – V08
19
5
Maintenance [specialist]
5.1
Draining the solar system
1.
Switch off the controller and secure it
against being switched on again.
2.
Open the check valves in the return ball
valves [1.2I7.1], by turning them to 45°
position (45°, see page 12).
3.
Connect a heat-resistant hose to the
lowest drain valve of the solar installation
(possibly drain valves [3.2
ￜ
9.2]).
Make sure that the solar fluid is collected
in a heat-resistant container.
WARNING
Danger of scalding due to hot solar fluid!
The escaping solar fluid can be very hot!
Position and secure the heat-resistant collecting container such that
persons nearby are not put at risk when the solar system is drained.
4.
Open the drain valve at the lowest point of the solar installation.
5.
To accelerate draining of the solar circuit, you can open the air-bleed valve,
if present, at the highest point of the solar system.
6.
Dispose of the solar fluid observing the local regulations.
