5724 267 v1.0
Draining the solar circuit
17
Service
WARNING
The escaping medium may be very hot. Place the
collecting container so that anyone standing nearby are
not in danger of scalding when the solar system is being
emptied.
1. Disconnect power supply to the controller and make
sure that an accidental restart is not possible.
2. Open the check valves in the supply and return ball
valves (a) (b) by turning them to position 45° (see
page 13).
3. Connect a heat-resistant hose to the fill valve (h).
Make sure that the solar fluid being drained is collected
in a heat-resistant container.
4. Open the fill valve (c) of the solar station.
5. Open a vent valve that may be present at the highest
point of the solar system.
6. Dispose of the solar fluid observing the local
regulations.
a
b
c
Fig. 16 Primary solar loop components
