Filling The Solar Circuit - Viessmann VITODENS 242-F Installation And Service Instructions Manual

Further details regarding the individual steps

Filling the solar circuit

Solar thermal system installation
and service instructions
A Solar circuit fill valve
!
Please note
Overheated collector areas and
overheated heat transfer medium
can cause burns/scalding and
equipment damage.
When working on the collector
and the solar circuit, protect the
collector area against solar irra-
diation.
1. Thoroughly flush the on-site pipe-
work.
Commissioning, inspection, maintenance
(cont.)
2. Fill solar circuit with "Tyfocor LS" via
fill valve A.
■ Minimum system pressure: 1.7 bar
(0.17 MPa)
■ Permissible operating pressure:
6 bar (0.6 MPa)
!
Please note
To prevent appliance dam-
age, only use "Tyfocor LS".
Never fill with water.
3. Close ball valve in fill valve A.
4. Open the air vent valve at the solar
collector.
5. Start the solar circuit pump via the
actuator test (see page 123).
6. Let the solar circuit pump run until the
solar circuit is fully vented. If the sys-
tem pressure is below 1.7 bar
(0.17 MPa), add more "Tyfocor LS".
7. Close the air vent valve at the solar
collector.
8. Check system pressure. If the system
pressure is below 1.7 bar
(0.17 MPa), add more "Tyfocor LS".
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