Scope Of Inspection - Viessmann Vitosol 200-T Service Instructions Manual

Scope of inspection

The solar thermal system should be
inspected once a year to ensure opera-
tional reliability.
In addition to this, a visual inspection of
all essential components (e.g. collectors
and pipework) is recommended every 3
to 5 years.
■ Vent the solar thermal system.
■ Compare system operating pressure
with the set value. If the values are dif-
ferent, check the expansion vessel.
■ Check the heat transfer medium.
■ Start circulation pumps manually if
necessary (listen for noises).
■ Compare flow rate with set value.
■ Check thermostatic mixing valve (if
installed).
■ Check plausibility of the solar param-
eters subject to the current insolation
level (e.g. flow and return tempera-
tures at the thermometers; collector
and cylinder temperatures at the solar
control unit).
Only check the safety valve if there are
visible signs of it being open (e.g. depos-
its, drips).
Scope of inspection
15