HDG F20 - Switching off the heating system for repair work

6 Using the heating system – Switching off the heating system for repair work
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10.Press Yes (1).
✓ The display switches to the chimney sweep test.
✓ All heating components are activated for heating components.
✓ Do not test yet! is shown on the display
11.Hold off with the test until the thresholds set for the boiler
temperature and for the combustion chamber temperature have
been exceeded.
✓ The display will then show Measurement done.
✓ The chimney sweep test can be started.
6.5 Switching off the heating system for repair
work
1. Allow the fire in the boiler to burn out and cool off.
2. Switch the heating system off.
Figure 6/23 - Chimney sweep test security query
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Figure 6/24 - Chimney sweep test
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Pressing the Cancel test button (1) cancels the chimney sweep test.
If you do not change the operating mode within 45 minutes, the
heating system will automatically return to the previous operating
mode.
Important!
Frost danger
Only completely shut off the power to the heating system if the
danger of frost can be ruled out.