Draining The Solar System - AOSmith MVI 103 Notice D'installation Et D'utilisation

4.3 Draining the solar
system
4.3.1
MVI pompstation / MVI pump station / station de pompage MVI
1. Disconnect the power supply. The pump may not run during draining.
2. Connect a heat resistant hose to the drain valve connection.
Note:
Make sure that the solar fluid is collected in a heat resistant container.
3. Open the drain valve (I) to remove solar fluid and reduce the pressure of the solar
system.
4. Open the air elimination valve, mounted on the highest part of the collector field.
Note:
Be prepared. It could be possible that hot fluid is still coming out of this
elimination valve.
5. The fluid can now be drained from the system. Dispose the solar fluid observing the
local prescriptions.
Danger: Danger of scalding due to hot solar fluid!
The escaping medium may be very hot. Place the collecting container so
that people standing nearby are not endangered when the solar thermal
system is being emptied.
Dismantling the expansion vessel
The following procedure must be followed to dismantle the expansion vessel.
1. Depressurize the installation
2. Remove the protective cap (G) and valve cap (H)
3. Push the inner valve (J) in to drain the pressure from the expansion vessel
4. Unscrew the expansion vessel
5. When disposing the expansion vessel observe local regulations
Note:
A full expansion vessel is heavy.
Danger: Danger of scalding due to hot solar fluid!
The escaping medium (both from the inner valve (J) as from the water
nipple) may be very hot. Execute the work safely so that people standing
nearby are not endangered when the expansion vessel is dismantled.
65