PART IV: MAINTENANCE
54
Checking the detection current
To check the detection signal follow the scheme in the picture below. If the signal is less than the value indicated, check the position of
the detection electrode or detector, the electrical contacts and, if necessary, replace the electrode or the detector.
Seasonal stop
To stop the burner in the seasonal stop, proceed as follows:
1
turn the burner main switch to 0 (Off position)
2
disconnect the power mains
3
close the fuel valve of the supply line
Burner disposal
In case of disposal, follow the instructions according to the laws in force in your country about the “Disposal of materials”.
Fig. 33: Detection by photocell QRA..
Control box
Minimum detection signal
Siemens LME21-22
200 µA
:
GP/SB
R/W
N
QRA...
br
rt
sw
AGQ3...
sw
br
bl rt
sw
AGQ3...
sw
bl
QR
A
Control box
Minimum detection signal
Siemens LME7...
70µA with UV detector)