Viessmann Vitomax HS M73 Operating And Service Instructions page 56

Checklist
Suggested tests and test intervals
Note
The extent of inspections and time intervals are manu-
facturer's recommendations. As part of the commis-
sioning, these should be matched to the individual sys-
tem as part of the arrangements made with the system
user, the supervisory authority and the manufacturer.
Recommendation
We recommend that the 6-monthly tests are conducted
in accordance with the applicable regulations
(e.g. EN 12953) by a qualified employee of the manu-
facturer.
Note
The checklists included in the appendix can be used
as templates.
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