Combustion Analysis Check; Cleaning The Primary Heat Exchanger - Biasi RIVA COMPACT M90E.24S User Manual And Installation Instructions

Maintenance
2 Open the central heating drain cock (17 in
Fig. 9.4).
Fig. 9.4
3 A small quantity of water will remain in the
d.h.w. heat exchanger after draining. If the
boiler is being drained to prevent freezing, the
d.h.w. heat exchanger must be removed and
inverted to drain fully or an antifreeze solution
added.
9.5

Combustion analysis check

To carry out a combustion analysis:
1 remove the front panel of the case (see the sec-
tion 9.2 in this manual).
2 Remove the plugs indicated in Fig. 9.5.
17
Fig. 9.5
Reference figures are given in the sections 4.5 or
4.6 of this manual (Flue gas figures).
9.6 Cleaning the primary heat
exchanger
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.
If you notice dirt on the fins of the primary heat ex-
changer (31 on page 9):
3 cover the sloping surfaces of the burner (29 on
page 9) entirely in a protective layer (sheets of
newspaper or similar).
4 Brush out the primary heat exchanger (31 on
page 9) 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.
Air--- Flue exhaust
Sampling points
35