Riello DB3 SM C01 TC FS1 A0 T250, Installation, Use And Maintenance Instructions, Page: 39 / 64

17
CHAPTER
5
Preparation for start up
5.6 Flame present check
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
5.7 Periodic checks
We recommend carrying out the following checks:

LIST OF MONTHLY CHECKS
1 Verify the photocell and possibly clean it.
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 electrodes;
- flame pipes.
D1143
Fig. 23