Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual page 28

Commissioning, inspection, maintenance
Further details regarding the individual steps
!
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
irradiation.
1. Thoroughly flush the on-site pipe-
work.
2. Open non-return valve A.
3. Fill the solar circuit via fill valve B
with "Tyfocor G-LS". Check the
system pressure at pressure gauge
C.
Minimum system pressure: 1.7 bar.
Permiss. operating pressure:
3.5 bar.
!
Please note
To prevent equipment
damage,
use exclusively "Tyfocor G-
LS". Never fill with water!
28
(cont.)
4. Close ball valve of fill valve B.
5. Open the air vent valve at the solar
collector.
6. Start the solar circuit pump.
At the Vitosolic 100 select "MM"
with a/b and confirm with d.
Select "1" with a/b and con-
firm with a.
The solar circuit pump starts.
7. Let the pump run until the solar cir-
cuit is fully vented. Check the sys-
tem pressure at pressure gauge
C. Below 1.7 bar top up with
"Tyfocor G-LS".
8. Close the air vent valve at the solar
collector.
9. Switch OFF the solar circuit pump.
At the Vitosolic 100 select "4" with
a/b and confirm with d.