Cleaning The Burner; Controlling The Flue Gas Exhaust Duct; Checking Boiler Efficiency - Biasi RINNOVA CV Series User Manual And Installation Instructions

9.8 Cleaning the burner

The ramp and multi-gas type burner does not
require any special maintenance, simply dust
it off using a bristle brush. More specific main-
tenance for this component will be assessed
and performed by a technician from an autho-
rised service centre.
9.9 Controlling the flue gas exhaust
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).
To check the vacuum of the Venturi, use the
tapping points indicated in Figure 9.6.
Figure 9.6
Refer to the following table for the minimum
pressure value for the Venturi:
M290E.24CV model
Minimum Venturi pressure
M290E.28CV model
Minimum Venturi pressure
M290E.32CV model
Minimum Venturi pressure
Figure 9.7
MAINTENANCE

9.10 Checking boiler efficiency

Carry out performance checks at the intervals
anticipated by the regulations in force.
• 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-
ting the boiler's chimney sweep function" on
page 60)
• Check boiler combustion using the flue gas
outlet on the flue gas exhaust pipe near the
boiler and compare the data measured with
those below.
Model L1P26-LUCA 24 S
Nominal heat input
Nominal efficiency
Combustion efficiency
Air index
Composition of CO2 fumes
Composition of O2 fumes
Flue gas temperature
Values refer to tests with 60/100 1 m concentric
discharge and Methane gas G20 and with heating
delivery/return temperature of 60°/80°C
Figure 9.8
Model L1P31-LUCA 28 S
Pa 76
Nominal heat input
mbar 0.76
Nominal efficiency
Combustion efficiency
Pa 111
Air index
mbar 1.11
Composition of CO2 fumes
Composition of O2 fumes
Pa 149
Flue gas temperature
mbar 1.49 Values refer to tests with 60/100 1 m concentric
discharge and Methane gas G20 and with heating
delivery/return temperature of 60°/80°C
Figure 9.9
kW 25,5
% 92,8
% 93,7
n 1,7
% 6,9
% 8,6
°C 123
kW 31,1
% 93,3
% 94,8
n 1,5
% 7,6
% 7,3
°C 111
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