Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 121

Further details regarding the individual steps
Filling and venting the solar circuit
Danger
Overheated collector areas and
overheated heat transfer medium
can cause burns/scalding and
equipment damage.
When working on the collector
and the solar circuit with heat
transfer medium, protect the col-
lector areas against solar irradia-
tion.
1. Check the pre-charge pressure of the
diaphragm expansion vessel.
Checking expansion vessels and the primary circuit/heating cir-
cuit pressure
Observe design information.
Vitocal technical guide
Commissioning assistant
The commissioning assistant guides you
automatically through all the menus
where settings have to be made.
!
Please note
Incorrect operation at "Coding
level 1" can result in damage to
the appliance and heating sys-
tem.
Always observe the installation
and service instructions; failure to
observe these will void your war-
ranty rights.
Commissioning, inspection, maintenance
(cont.)
!
2. Please note
To prevent equipment dam-
age, only fill the solar circuit
with Tyfocor LS.
3. Vent the solar circuit.
Minimum system pressure: 1.7 bar
Permiss. operating pressure: 6 bar
Note
■ The scan "Start commissioning
assistant?" only appears during ini-
tial commissioning.
■ The configuration, parameter settings
and function check can also be carried
out without the commissioning assis-
tant (see page 171, separate menu
structure and operating instructions).
■ When the unit is first commissioned,
the display is in German:
121