13
2915246
GB
COMBUSTION CHECKS
CO
2
It is advisable to not exceed 10% of CO
2
(gas with calorific value of 8600 kcal/m3), in order to avoid the risk that small
changes of the adjustments due, for instance, at draught variation, may cause combustion with insufficient air and
consequently formation of CO.
CO
For safety reason the value of 0.1% (one thousand p.p.m.) must not be exceeded.
IONIZATION CURRENT
The minimum current necessary for the control box operation is 6 µA.
The burner normally supplies a higher current value, so that no check is needed.
However, if a measurement of the ionization current is required, it is necessary to disconnect the probe lead and insert
a d.c. microamperometer.
Motor lock-out
This is caused by the thermal protector relay, in case of overloading, or by the lacking of the phase.
To clear, pushdown the appropriate knob, after having removed the protective cover.
BURNER START-UP
If during operation the flame shut off, lock-out occurs within 1 sec.
