Safety Components; Measuring The Ionisation Current; Checking The Air And Gas Pressure On The Combustion Head - Riello RS 310/E ULX Installation, Use And Maintenance Instructions

Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics in-
tact, especially the flue gas temperature and combustion cham-
ber pressure.
Gas leaks
Make sure that there are no gas leaks on the pipe between the
gas meter and the burner.
Gas filter
Change the gas filter when it is dirty.
Electric current to the flame sensor
Clean the ionization probe from any dust.
Check the mechanical integrity of the component and the flame
signal measured by the flame control.
Combustion
If the combustion values measured before starting maintenance
do not comply with applicable legislation or do not indicate effi-
cient combustion, consult the table or contact our Technical Sup-
port Service to implement the necessary adjustments.
It is advisable to set the burner according to the type of gas used
and following the indications in Tab. Q.
EN 676
Max. output
CO
CO theoretical
2
2
GAS
max. 0% O
 = 1.2
2
G 20 11.7 9.7
G25 11.5 9.5
8.2.4

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
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)
Fan impeller
Air excess
Min. output
 1.2  1.3
% Calibration
CO
 = 1.3 mg/kWh mg/kWh
9.0  100
8.8  100
Life cycle
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
10 years or 500,000 start-ups
Maintenance
8.2.5

Measuring the ionisation current

The burner is fitted with an ionisation system to check that a fla-
me is present.
The minimum current for flame control operation is 4 μA. The
operator panel displays "30%"(see "List of parameters" on
page 44, 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, di-
sconnect 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. 34.
Carefully check the polarities!
WARNING
+
NO
X
 170
 170
Tab. Q
8.2.6 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. 35.
Checking
gas pressure
Checking
air pressure
Tab. R
51 GB
-
+
-
20201488
Fig. 34
20198302
Fig. 35
20205048