Viessmann Vitodens 333 Service Instructions Manual page 7

Steps initial start-up, inspection and . . .
Commissioning steps
Inspection steps
Maintenance steps
20. Checking the condensate drain and cleaning the
siphon
21. Checking the neutralising system (if installed)
22. Testing the anode earth current with an anode
tester
23. Cleaning the DHW cylinder
24. Checking and replacing the magnesium anode (if
required)
25. Returning the DHW cylinder into use
26. Checking the diaphragm expansion vessel and
system pressure
27. Checking the function of all safety valves
28. Checking the tightness of electrical connections
29. Checking all gas equipment for soundness at
operating pressure
30. Checking the combustion quality
31. Checking the ionisation current
32. Checking the external LPG safety valve (if
installed)
33. Matching the control unit to the heating system
34. Adjusting the heating curve (only for weather
compensated control units)
35. Connecting the control unit to the LON system
(only for weather compensated control units)
36. Implementing a user check (in conjunction with
the LON system for weather compensated control
units)
37. Instructing the system user
38. Scanning and resetting the "Maintenance" display
Initial start-up, inspection, maintenance
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