17
20153481
GB
Technical description of the burner
4.15 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 calibration
2)
, see the table in the wiring diagram.
To reset, in case of an intervention of the thermal relay, press the
“RESET” button 1) of Fig. 10.
The red “TEST” button 3) opens the NC (95-96) contact and
stops the motor.
4.16
Motor rotation
As soon as the burner starts up, go in front of the cooling fan of
the fan motor and check it is rotating anticlockwise (Fig. 11).
If this is not the case:
set the burner switch to “0” (off) and wait for the control box
to carry out the switch-off phase.
Invert the phases on the three-phase motor power supply.
CAUTION
The automatic reset can be dangerous. This oper-
ation is not foreseen in the burner operation.
Therefore do not position the “RESET” button
1) on “A”.
3
1
2
RESE
T
H
A
TEST
95
96
97
98
Fig. 10
20073932
DANGER
Disconnect the electrical supply from the burner
by means of the main system switch.
Fig. 11
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