Check The Pressure In The Heating Expansion; Tank; Cleaning The Domestic Hot Water Exchanger; Checking The Flue Gas Expulsion Duct - Biasi RINNOVA ADAPTIVE User Manual And Installation Instructions

Figure 9.14
If there is any dirt on parts of the primary con-
densate exchanger (which can be seen after
removing the burner casing), brush them with
a bristle brush and then remove the dirt using
a vacuum cleaner.
The burner does not require particular mainte-
nance, simply dust it off using a bristle brush.
More specific maintenance will be assessed
and performed by a technician from an Autho-
rised Service Centre.
For reassembly, repeat the opera-
tions but in reverse order, being
careful not to damage the gas pipe
OR gasket when the pipe is insert-
ed in the gas/air diaphragm. Carry
out the gas tightness test after
tightening the gas pipe swivel
joint.
9.8 Check the pressure in the heating
expansion tank
Empty the heating circuit as described in sec-
tion "Emptying the heating circuit" on page
61 and check that the expansion tank pres-
sure is not less than 1 bar.
If the pressure is lower, correct the pressure.
MAINTENANCE
9.9 Cleaning the domestic hot water
exchanger
Descaling the domestic hot water exchanger
will be assessed by a technician from an Au-
thorised Service Centre, who will perform the
cleaning using specific products.
9.10 Checking the flue gas expulsion
duct
Have a technician from an authorised service
centre periodically check the condition of the
flue gas exhaust duct, the air duct and the ef-
ficiency of the flue gas safety circuit (at least
once a year).

9.11 Checking boiler efficiency

Carry out performance checks at the intervals
anticipated by the regulations in force.
• Connect a flue analyser to the flue gas anal-
ysis outlets on the flue gas exhaust on the
boiler Figure 9.15.
Figure 9.15
• Make sure that the room thermostat is in the
"heat request" position.
• Draw off an abundant amount of DHW by
opening the taps.
• Activate the "chimney sweep function" at
maximum output in heating mode (see "Set-
ting the boiler's chimney sweep function" on
page 64)
• Check the boiler combustion using the out-
lets located on the flue pipes (Figure 9.15)
and compare the data measured with the
Flue gas analy-
sis outlets
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