22
0312_1702
Figure 12
Positioning of the ignition
and flame sensing electrode
Check of combustion parameters
To measure combustion performance and hygiene levels of combustion
products, the forced draught boiler models are equipped with two test
points on the tapered coupling specifically designed for this purpose.
One of the two test points is connected to the exhaust flue duct to allow
measurements of the combustion products hygienic standards and
combustion efficiency.
The second test point is connected to the comburant air inlet duct to
check possible combustion products circulation in case of coaxial ducts.
The exhaust flue duct test point allows measurements of the following:
• combustion products temperature;
• concentration of oxygen (O
2
) or, alternatively, of carbon dioxyde
(CO
2
);
• concentration of carbon monoxyde (CO).
The comburant air temperature must be measured at the test point
connected to the air inlet duct.
9912070100
Electronic board calibration
When the jumper or the switch is in the (fig. 13a) position:
MET
operation of system with NATURAL gas
T-off
3-minute heating stand-by time
When the jumper or the switch is in the (fig. 13b) position:
GPL
operation of system with LPG
T-off
10-seconds heating stand-by time
NB Make sure that electrical power supply has been disconnected before
making settings.
Figure 13b
Figure 13a
0403_0809
0402_1702
0402_1701
Summary of Contents for Performa 24
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