Table of Contents
Advertisement
4.11
Calibration of the thermal relay
The thermal relay serves to avoid damage to the motor due to an
excessive absorption increase or if a phase is missing.
For the calibration, act on the wiper 2)(Fig. 25) by referring to the
wiring diagram.
In case of burner lock-out, due to the thermal relay, press the but-
ton 1)(Fig. 25).
The automatic reset can be dangerous.
This operation is not foreseen in the burner oper-
ation.
WARNING
4.12
Measuring the ionisation current
The burner is fitted with an ionisation system to check that a
flame is present. The minimum current for control box operation
is 6 µA.
The burner provides a much higher current, so controls are not
normally required.
If it is necessary, however, to measure the ionisation current, dis-
connect the plug-socket 2)(Fig. 26) on the ionisation probe cable
and insert a direct current microammeter 1)(Fig. 26) with a base
scale of 100 µA.
Carefully check the polarities!
WARNING
Installation
2
1
2
23
GB
20142908
1
Fig. 25
D8696
Fig. 26
20194185
Advertisement
Table of Contents
