Check The Pressure In The Heating; Expansion Tank; Cleaning The Domestic Hot Water Exchanger 64 9.8 - Biasi RINNOVA COND 24S User Manual And Installation Instructions

be replaced every 2 years.
Figure 9.9
If there is any dirt on parts of the primary
condensate 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 any particular
maintenance. Remove any dust using a
bristle brush.
More specific maintenance will be assessed
and performed by a technician from an Au-
thorised Service Centre.
For reassembly, repeat the oper-
ations in reverse order, being
careful not to damage the gas
pipe OR gasket when the pipe is
inserted in the gas/air dia-
phragm. Carry out the gas tight-
ness test after tightening the
gas pipe swivel joint.
9.6 Check the pressure in the heat-
ing expansion tank
Empty the heating circuit as described in
section "Emptying the heating circuit" on
page 62 and check that the expansion
- 64 -
MAINTENANCE
tank pressure is not less than 1 bar.
If the pressure is lower, correct the pres-
sure.
9.7 Cleaning the domestic hot wa-
Descaling the domestic hot water exchang-
er will be assessed by a technician from an
Authorised Service Centre, who will perform
the cleaning using specific products.
9.8 Checking the flue gas expul-
Have a technician from an authorised ser-
vice centre periodically check the condition
of the flue gas exhaust duct, the air duct and
the efficiency of the flue gas safety circuit
(at least once a year).
9.9 Checking boiler efficiency
Carry out performance checks at the inter-
vals anticipated by the regulations in force.
• Connect a flue analyser to the flue gas
analysis outlets on the flue gas exhaust
on the boiler Figure 9.10.
Figure 9.10
• Make sure that the room thermostat is in
the "heat request" position.
• Draw off an abundant amount of DHW by
opening the cocks.
• Activate the "chimney sweep function" at
maximum output in DHW mode (see "Set-
ter exchanger
sion duct
Flue gas
analysis outlets