Checking The Pressurisation In The Expansion Vessel; Cleaning The Burner; Checking The Flue; Visual Inspection Of Appliance - Biasi RIVA COMPACT M90E.24S User Manual And Installation Instructions

Maintenance
9.7 Checking the pressurisation
in the expansion vessel
Empty the central heating system as described in
section 9.4 of this chapter and check that the pres-
sure in the expansion vessel is not less than 1 bar.
See also section 4.4 page 11 of this manual.
If the pressure is lower, take steps to correct the
pressure level.
9.8

Cleaning the burner

The sloping and multi--- gas type burner (29 on
page 9) does not need special maintenance, but
it is sufficient to dust it with a bristle paintbrush.
To reach the burner:
1 Take off the front of the case.
2 Take off the removable front of the air--- tight
chamber and the front panel of the combustion
chamber.
3 Brush out the burner with a bristle paintbrush.
NOTE --- When removing the airtight chamber
cover it is not necessary to remove the screws lo-
cated at the top edge on either side.
36
9.9

Checking the flue

Have the integrity of the flue outlet pipe (45 on
page 10) air intake pipe (46 on page 10), checked
periodically, the venturi device* (42 on page 10)
cleaned and the efficiency of the flue safety circuit
checked at least once a year.
* For details see the section Fan, venturi device
and air pressure switch in the service manual.
For all the above maintenance operations it is ad-
visable to call an approved Service Engineer.
9.10 Visual inspection of
appliance
Visually inspect all water joints, seals and connec-
tions for any evidence of leakage and retighten,
grease or replace them as necessary.
9.11 Gas pressures and
soundness
Check appliance for gas soundness. Recheck op-
erational pressures and adjust as necessary as
described in section 7.6 page 29 of this manual.