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5.15.2 Supply cables and external connections
passage
All the cables to be connected to the burner should be passed
through cable grommets, as shown in Fig. 32.
To guarantee the protection level of the burner, it
is necessary to close any holes and fairleads not
used using the plugs supplied.
WARNING
1
3
2
6
5
4
20062902
5.16
Motor rotation
As the burner is not fitted with a phase sequence checking de-
vice, the motor rotation may be incorrect.
As soon as the burner starts up, go in front of the
fan motor cooling fan and check it is rotating anti-
clockwise (Fig. 33).
WARNING
If this is not the case:
turn the burner switch to position "0" (OFF) and wait for the
control box to carry out the switch-off phase;
disconnect the power supply to the main panel;
invert the phases on the three-phase power supply.
This operation must be carried out with the electri-
cal supply disconnected.
DANGER
5.17
Calibration of the thermal relay
The thermal relay (Fig. 34) serves to avoid damage to the motor
due to an excessive absorption increase or if a phase is missing.
For calibration 2), refer to the table indicated in the electrical lay-
out (electrical wiring in charge of the installer).
To reset, in case of an intervention of the thermal relay, press but-
ton "RESET" 1).
The button "STOP" 3) opens the NC contact (95-96) and stops
the motor.
Insert a screwdriver in the window "TEST/TRIP" 4) and move it in
the arrow direction (to the right) to carry out the thermal relay test.
The automatic reset can be dangerous.
This operation is not foreseen in the burner oper-
ation.
WARNING
Installation
5
5
7
6
7
6
7
7
7
Fig. 32
29
GB
Key (Fig. 32)
1
Electrical supply
2
Minimum gas pressure switch
3
Pressure switch for VPS gas valve leak detection
4
Gas train
5
Consents/Safety
6
Available
7
Plug
After carrying out maintenance, cleaning or
checking operations, reassemble the cover and
all the safety and protection devices of the burner.
20079199
Fig. 33
D11301
Fig. 34
20124044
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