Viessmann VITOLIGNO 300-S Operating Instructions Manual page 52

Maintenance
Emptying the heat exchanger ash pan
Fig. 42
Cleaning the sight glass
1.
2.
Fig. 43
52
1. Open the cleaning door using the hand knob.
2. Empty the ash pan.
3. Clean the flue gas collector chamber and secon-
4. Check the gaskets for wear and damage. Replace
5. Reinsert the ash pan and close the cleaning door.
2.
Note
Ensure that all cleaning covers and doors are shut. If
the cleaning cover does not close properly this can
adversely affect combustion performance.
1.
1. Remove the casing panel.
2. Remove the sight glass from the inspection port
3. Reinstall the sight glass and casing panel by fol-
3.
dary air chamber with a scraper or vacuum
cleaner.
the gaskets if necessary.
and clean.
lowing the above steps in reverse order.