Vitotronic 300, GW2B Installation and Service
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Testing the High Limit Safety Cut-out
1. Hold down the “TEST” key until the burner has shut
down:
Thermostat is bridged. The high limit safety cut-out
must shut down the burner at the latest when the
safety temperature has been reached.
2. Release the “TEST” key.
3. Wait until the boiler water temperature has dropped
approx. 15 to 20 K below the selected safety
temperature.
4. Reset the high limit safety cut-out by pressing reset
button.
Commissioning
Changing the Language
Setting the Date and Time
The time and date need to be reset during commissioning
or after prolonged time out of use.
The following is displayed during commissioning
(factory set German).
Refer to the Operating Instructions
The minimum circulation volume should be 10%
of the circulation volume at rated load.
Reduce the heat consumption as far as possible.
