Ventilating The Solar Heating System - Viessmann VITOSOL-F Service Instructions Manual

Further details regarding the individual steps

Ventilating the solar heating system

1. Open the air vent valve.
Vent the circulation pumps. For
this, adjust the circulation pumps to
their maximum speed switching the
pump ON and OFF several times (a
ventilated pump runs almost
silently) through a relay test
(manual operation).
Repeat the ventilation process
until the float in the flow meter of
the Solar-Divicon holds a constant
position when the pump is running
(highest pump rate).
Note
Air can be recognised in the flow
rate indicator (float moves).
Adjustable flow rates
Vitosol 200-F, type 5DI
Throughput 3 to 4 l/min
Vitosol 200-F, 300-F
The details in the following table do not take the pipe pressure drop into
account.
Commissioning, inspection, maintenance
(cont.)
2. Set required flow rate above output
rate of the circulation pump (see
following tables for approximate set
values).
Read the value on the underside of
the float.
3. Repeat the ventilation process
after the system has been opera-
tional for several days.
Note
If the system pressure drops, top-
up the heat transfer medium in the
cold state and ventilate again.
4. Always shut-off the air vent valve
after ventilation.
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