ENGLISH
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0006160045_201802
CONTROLS
After starting the burner, check the safety devices, photoresistor, lock
components, thermostats.
•
The photoresistor is the device controlling the flame and therefore
must be able to intervene if the flame turns off during operation.
•
The burner must lock out and remain in that condition when, during
the ignition sequence in the time pre-set by the control device, the
flame does not appear regularly.
•
The lock-out causes the immediate stop of the motor and burner
and the switching on of the corresponding lock-out light indication.
Proceed as follows to check the efficiency of the photoresistor and the
relating lock-out warning light:
•
Start the burner.
• After ignition, remove the photoresistor, pulling it out of its housing,
to simulate absence of flame by darkening the photoresistor
blocking off the window in the photoresistor support with a cloth
•
The burner flame must go out.
•
Keep the photoresistor darkened to restart the burner, but if the
photoresistor does see the light within the time preset by the
control device, the burner will lock-out.
•
The equipment can only be reset manually by pressing the specific
button.
•
To check the thermostats’ efficiency, increase the boiler water
temperature up to at least 50° C.
•
Act on the thermostat control knob to lower the temperature until
the burner stops.
•
The thermostat should activate within a maximum range of 10° C
with respect to the boiler thermometer; if not, change the setting on
the thermostat scale to match that of the thermometer.
DIAGRAM FOR REGULATING THE ELECTRODE DISK DISTANCE
E
D
B
A
C
3
4
1
1
0002933770
Model
A
B
C
D
E
BT 17N
2
19
21
2÷3
10
1 - Ignition electrodes
3 - Flame disc
4 - Combustion head
After having installed the nozzle, check the
correct position of the electrodes and disk
according to the following values, indicated in
millimetres.
After each operation on the head, make sure to
comply with the indicated values.
DANGER / ATTENTION
To prevent damage to the support, carry
out nozzle assembly and disassembly
tasks with the aid of a wrench and
counter-wrench.
Summary of Contents for BT 17N
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Page 63: ...ENGLISH 63 64 0006160045_201802 WIRING DIAGRAMS...
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