Riello DB 3 LSM C13 Installation, Use And Maintenance Instructions page 55

Safety test - with gas ball valve closed
It is fundamental to ensure the correct execution of the electrical
connections between the gas solenoid valves and the burner to
perform safely the commissioning.
For this purpose, after checking that the connections have been
carried out in accordance with the burner's electrical diagrams,
an ignition cycle with closed gas ball valve -dry test- must be
performed.
1 The manual ball gas valve must be closed
2 The electrical contacts of the burner limit switch need to be
closed
3 Ensures closed the contact of the low gas pressure switch
4 Make a trial for burner ignition
The start-up cycle must be as follows:
– Starting the fan for pre-ventilation
– Performing the gas valve seal control, if provided
– Completion of pre-ventilation
– Arrival of the ignition point
– Power supply of the ignition transformer
– Electrical Supply of solenoid gas valves
Since the manual gas ball valve is closed, the burner will not
light up and its control box will go to a safety lockout condition.
The actual electrical supply of the solenoid gas valves can be
verified by inserting a tester. Some valves are equipped with
light signals (or close/open position indicator) that turn on at the
same time as their power supply.
IF THE ELECTRICAL SUPPLY OF THE GAS VALVES
OCCURS AT UNEXPECTED TIMES, DO NOT OPEN
MANUAL GAS BALL VALVE, SWITCH OFF POWER
LINE; CHECK THE WIRES; CORRECT THE ERRORS
WARNING
AND REPEAT THE COMPLETE TEST.
24
CHAPTER
Safety components
The safety components must be replaced at the end of their life
cycle indicated in Tab. B. The specified life cycles do not refer
to the warranty terms indicated in the delivery or payment con-
ditions.
Safety component
Flame control
Flame sensor
Gas valves (solenoid)
Pressure switches
Pressure adjuster
Servomotor (electronic
cam) (if present)
Oil valve (solenoid)(if
present)
Oil regulator (if present)
Oil pipes/ couplings
(metallic) (if present)
Flexible hoses (if present)
Fan impeller
7
Maintenance
Life cycle
10 years or 250,000
operation cycles
10 years or 250,000
operation cycles
10 years or 250,000
operation cycles
10 years or 250,000
operation cycles
15 years
10 years or 250,000
operation cycles
10 years or 250,000
operation cycles
10 years or 250,000
operation cycles
10 years
5 years or 30,000 pressurised
cycles
10 years or 500,000 start-ups