Checking The Function Of All Safety Valves; Checking All Gas Equipment For Soundness At Operating Pressure - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
2. Release the hose tie on sight hose
D, pull the sight hose out and
drain its contents into a suitable
container.
Note
The container has a capacity of
approx. 9 l.

Checking the function of all safety valves

Checking all gas equipment for soundness at operating pres-
sure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for
soundness.
44
(cont.)
3. Secure sight hose D again with
cable ties.
Check the function of the safety
valves on the solar side A and the
heating circuit side B.