Safety Components; Measuring The Ionisation Current; Checking The Air And Gas Pressure On The Combustion Head - Riello 1146T1 Installation, Use And Maintenance Instructions

7.2.3

Safety components

The safety components should be replaced at the end of their life
cycle indicated in the following table.
The specified life cycles do not refer to the warranty terms indi-
cated in the delivery or payment conditions.
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
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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
Tab. U
7.2.4

Measuring the ionisation current

The burner is fitted with an ionisation system to check that a
flame is present.
The minimum current for control box operation is 4 µA. The oper-
ator panel displays "30%" (see "List of parameters" on page 47,
parameter no. 954).
The burner provides a much higher current, so controls are not
normally required.
However, if it is necessary to measure the ionisation current, dis-
connect the plug-socket on the ionisation probe cable and insert
a direct current microammeter with a base scale of 100 µA, as
shown in Fig. 37.
Carefully check the polarities!
WARNING
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7.2.5 Checking the air and gas pressure on the
combustion head
To carry out this operation it is necessary to use a pressure
gauge to measure the air and gas pressure at the combustion
head, as shown in Fig. 38.
Checking
air pressure
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54 GB
Fig. 37
Checking
gas pressure
Fig. 38