Unigas HR93A, Руководство по установке, использованию и обслуживанию

Страница: 42 / 52

C.I.B. UNIGAS - M039213CB
42
Removing the oil gun, replacing the nozzle and the electrodes
To remove the oil gun, proceed as follows:
1 remove the combustion head as described on the prevoius paragraph;
2 loosen the VL screw and remove the oil gun and the electrodes: check the oil gun, replace it if necessary;
3 after removing the oil gun, unscrew the nozzle and replace it if necessary;
4 in order to replace the electrodes, unscrew the VE fixing screws and remove them: place the new electrodes being careful to
observe the measures showed on pag.: reassemlbe following the reversed procedure.
Caution : adjust the nozzle position according to the air pipe, by means of the VU screw, ance the VL screw is fastened.
Adjusting the electrodes position
Adjust the electrodes position, according to the quotes shown othe next picture
Fig. 33
Cleaning and replacing the detection photocell
To clean/replace the detection photocell, proceed as follows:
1 Disconnect the system from the electrical power supply.
2 Shut off the fuel supply;
3 remove the photocell from its slot (see next figure);
4 clean the bulbe if dirty, taking care not to touch it with bare hands;
5 if necessary, replace the bulb;
6 replace the photocell into its slot.
Checking the detection current
To check the detection current follow the diagram on Fig. 34. If the signal is lower 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.
Fig. 34Detection with detector QRA...
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”.
ATTENTION: avoid the electrodes to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler operation
would be compromised. Check the electrodes position after any intervention on the combustion head.
Control box Minimum detection signal
Siemens LFL1.3..
70µA ( with UV detector)
VU
VL
VE
U
E
TG
Keys
E
electrodes
TA air pipe
TG ignition gas pipe
U nozzle
TA
TERMINAL BOARD
MC