necessary. Reinstall in the same orientation, and lock bayonet port with a clockwise
quarter-turn.
7.5 Cleaning the sight glass
When a new combi boiler is first fired up, gases in the system can cloud up the viewport. If so, you
will need to clean the sight glass to view the presence of a flame.
1. Turn off the electric power and gas supply to the combi boiler.
2. Allow the combi boiler to cool down.
3. Remove the two screws holding the sight glass in place.
4. Remove the four components of the sight glass and wipe the glass clean.
5. Before you reassemble the sight glass, check that the gaskets are in good condition.
6.
Assemble the components (see image below), by first inserting the rubber gasket l inside
the refractory top m followed by the glass k, and then the graphite gasket j.
Figure 47 Four components of the sight glass
7. Replace onto the lid, and fasten with the two screws.
7.6 Cleaning the condensate trap
Warning
If condensate neutralization is used, check the pH level of condensate before and after
neutralization to verify effectiveness and ensure that the discharge has neutral pH
levels. Never operate the combi boiler unless the trap is filled with water. Failure to
comply will result in severe personal injury or death.
Section: Service and maintenance
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