80
GB
MAINTENANCE
Electric control board
To access the electric control board, loosen the screws (1) that hold the terminal board cover (A). Remove the
clamp covers (A). ATTENTION: these parts may be live during functioning.
1
1
A
M
Combustion control
In order to obtain the best combustion yield, and with respect for the environment, it is recommended to perform
-
control and regulation of combustion with suitable tools. Fundamental values to consider are:
- CO
2
It indicates with which air excess combustion takes place; if the air increases, the % value of CO
2
decreases and
if the combustion air decreases the CO
2
increases. Acceptable values are 11-12 %.
- Smoke number (Bacharach). This indicates that solid unburned particles are present in the combustion gas.
If n°2 on the BH scale is passed, check that the nozzle is not faulty and that it is suitable for the burner and boiler
(brand, type, spray angle). In general the BH n° tends to decrease by raising the pressure in the pump. In this case
it is necessary to pay attention to the fuel flow rate that increases and therefore, if required, reduce the capacity
at the nozzle.
- Flue gas temperature. It is a value that represents the dispersion of heat through the flue; the higher the tempe
-
rature the greater the dispersion and the lower the combustion yield.
Содержание LMB LO 1300
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