Riello DB 12 LSE C13 A0 FS1 FR Installation, Use And Maintenance Instructions page 40

7
Maintenance
Checking the flame detector
UV cell
Minimum current for correct working is 70 µA.
If the value is lower, it could be due to:
• exhausted photocell;
• low current (lower than 187 V);
• bad regulation of the burner.
In order to measure the current, use a microammeter of 100 A c.c., connected in series to the photocell, as in the scheme, with
a capacitor of 100 F - 1V c.c. at the same level of the instrument.
7.2 Periodic checks
We recommend carrying out the following checks:
LIST OF MONTHLY CHECKS
1 Inspect the flame detection device and check it is undamaged and clean.
2 Check the ignition device and clean if necessary.
3 Check the right pressure levels for fuel and air.
4 Check the correct movement and setting of the air damper and relative lifting assemblies.
5 Check the start up sequence and the safety interlocks, by simulating the relative anomaly situation.
LIST OF YEARLY CHECKS
1 Check the fuel blocking valves are still well sealed.
2 Check the settings on the pressure switches.
3 Visual check of the wires and connectors.
4 Check and clean the pressure test points.
5 Check the installation pipes for leaks.
6 Visual check of any damage and/or deformation of the following components:
- cylinder/distributor unit;
- flame disc;
- ignition unit;
- flame pipes.
7.3 Oil lance disassembly
To remove the oil lance, proceed as follows:
• loosen the fixing nut (A) on the lower part of the terminal fixed to the air box;
• disconnect the rubber hose from the rapid coupling and slide out the oil lance.
18
Fig. 27
D2158
D1143
Fig. 28
A