Viessmann B1HF - Performing an Actuator Test; Setting the Maximum Heating Output

42
Yes
Burner in operation
No
Shuts down below the set
boiler water temperature and
restarts immediately.
Check the flue system for
tightness (flue gas recircula-
tion). Check gas flow pres-
sure.
Yes
Automatic calibration of
the combustion controller
No
Fault 62, 373 Ensure adequate heat trans-
fer. Reset the appliance.
Fault 346, 377 Check gap between ionisa-
tion electrode and burner
gauze assembly.
Check flue system. Remove
flue gas recirculation if re-
quired.
Reset the appliance.
Operating instructions
For further details regarding faults, see "Troubleshoot-
ing".
Setting the maximum heating output
A limit can be set on the maximum heating output for
heating mode. The limit is set via the modulation
range.
B1HF-11
The max. heating output is not adjustable.
Tap the following buttons:
1. and OK simultaneously for approx. 4 s, then
release.
2. Use / to select "b.2" for system configura-
tion.
3. OK
4. Use / to select "7" for max. heating output.
5. OK
6. Use / to set the required value in % of rated
heating output. Factory setting 100 %.
7. OK
Performing an actuator test
The actuator test can only be set via the software tool.
Commissioning, inspection, maintenance
Function sequence and possible faults (cont.)
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