Unigas TP512A, Installation, User'S, And Maintenance Manual

Page: 39 / 56

CIB UNIGAS - M039177CA
39
Replacing the detection electrode
To replace the detection electrode, proceed as follows:
1 remove the combustion head according to the procedure on paragraph “Removing the combustion head”;
2 by means of an allen key, loose the fixing screws of the detection electrode ER and replace it;
3 replace the combustion head.
Checking the detection current
To check the detection signal follow the scheme in Fig. 38 or Fig. 39. 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.
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), otherwise
the boiler’s operation would be compromised. Check the electrodes position after any intervention on the combustion
head.
Control box Minimum detection signal
Siemens LFL1.3..
6µA (with electrode)
Siemens LFL1.3..
70µA with UV detector)
Fig. 38: Detection by electrode
Fig. 39: Detection by photocell QRA..
ER
ER
TERMINAL BOARD MC
SCALA µA DC
27
TERMINAL BOARD
MC