Cleanig The Burner; Checking The Combustion Fan; Checking The Flue - Biasi Riva Plus Installation And Operation Instructions Manual

17. Annual Maintenance Cont.
17.5 Checking the pressurization in the expansion vessel:
Empty the central heating system as described in section 17.3 of this chapter and check that
the pressure in the expansion vessel is not less than 1 bar (14.5 psi). See also section 13.2
page 26 of this manual. If the pressure should be lower, take steps to correct the pressure
level.
Follow the instructions for removing the external panels from
17.2. Remove the nine screws labelled C in figure 17.4. Now
you will have complete access to the combustion chamber.
The sloping and multi-gas type burner (7 on page 11) does not
need special maintenance, but it is sufficient to dust it with a
bristle paintbrush.
The combustion fan does not require any special maintenance. Lubrication is not necessary
due to the fact that the ball bearings are sealed. Check that the fan operates and that the
visible impeller fins are free of any dirt or obstructions.
Have the integrity of the flue outlet pipe (24 on page 12) air intake pipe (25 on page 12),
checked periodically, the venturi device (23 on page 12) cleaned and the efficiency of the flue
safety circuit checked at least once a year. For all the above maintenance operations it is
advisable to call an approved Service Engineer.
Remove the four Phillips head screws
•
from the vent connector on the boiler.
Remove the vent connector from the
•
boiler by pulling vertically on it.
Remove the first elbow from the
•
horizontal run of the exhaust to the
outside.
blockage.
•
Riva Plus Manual
17.6 Cleaning the burner:

17.7 Checking the combustion fan:

17.8 Checking the flue:

Using a flashlight inspect each length of
•
vent pipe for obstructions and dirt
buildup. Clean any that is found with an
appropriate sized brush.
Inspect the venture device inside the
•
outlet of the combustion fan. Make sure
that it is free of any dirt build up or
FIG.17.4
45