Visual Inspection Of Appliance; Gas Pressures And Soundness - Biasi Riva Combi Installation & Operation Instructions

17. Annual Maintenance Cont.
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 blockage.
•
Make sure the seals are properly
seated in the female ends of the
vent pipe with the fins facing the
male end of the pipe.
To check the pressure at the venturi device, use the test points in Fig. 17.6.
• Remove the caps of
the pressure test
points and connect a
differential pressure
gauge.
• Switch on the boiler.
Visually inspect all water joints, seals and connections for any evidence of leakage and
retighten, grease or replace them as necessary.
Check appliance for gas soundness. Recheck operational pressures and adjust as
necessary as described in Section 15.5 page 32 of this manual.
RIVA COMBI MANUAL - REV B
• Compare the value on
the gauge with the
minimum values of
venturi pressure
indicated in the
Section 2 on page 10.

17.12 Visual inspection of appliance:

17.13 Gas pressures and soundness:

•
Reinstall the elbow onto the
horizontal run of the pipe first by
simply pushing the parts together.
•
Push the vent adapter down onto
the top of the boiler and reinstall
the four Phillips head screws.
Venturi test
points
Figure 17.6
35