Checking The Magnesium Anode; Cleanig The Burner; Checking The Flue; Riva Combi Manual - Rev B - Biasi Riva Combi Installation & Operation Instructions

17. Annual Maintenance Cont.
• Take off the front panel of the case, then the sealed chamber lid and the front panel of
the combustion chamber.
If you notice dirt on the fins of the primary heat exchanger (11 on page 11), cover the
sloping surfaces of the burner (9 on page 11) entirely in a protective layer (sheets of
newspaper or similar). Brush out the primary heat exchanger (11 on page 11) with a
bristle paintbrush.
17.6 Checking the pressurization in the expansion vessel:
Empty the central heating system as described in section 17.4 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.
17.7 Checking the pressurization in the d.h.w. expansion vessel:
Empty the d.h.w. circuit as described in section 17.3 of this chapter and check that the
pressure in the d.h.w. expansion vessel is not less than 3,5 bar (50 psi). See also section
13.2 page 26 of this manual. If the pressure should be lower, take steps to correct the
pressure level.
To guarantee protection of the storage tank from corrosion, it is advisable to check
periodically the magnesium anode (31 on page 12) by an Approved Service Person.
Note: Empty the storage tank as shown on 17.3 before checking the magnesium anode
The sloping and multi-gas type burner (9 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 (33 on page 12) air intake pipe (34 on page 12),
checked periodically, the venturi device (29 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.

RIVA COMBI MANUAL - REV B

17.5 Cleaning the primary heat exchanger:

17.8 Checking the magnesium anode:

17.9 Cleaning the burner:
17.10 Checking the combustion fan:

17.11 Checking the flue:

•
Remove the first elbow from the
horizontal run of the exhaust to
the outside.
•
Using a flashlight inspect each
length of vent pipe for
obstructions and dirt build up.
45