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

17. Annual Maintenance Cont.
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.
Using a flashlight, inspect each
•
length of vent pipe for obstructions
and dirt build up. Clean any that is
found with an appropriate sized
brush.
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.
46
• 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:

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.
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
RIVA COMBI MANUAL - REV B
Figure 17.6