Measuring The Ionisation Current; Checking The Air And Gas Pressure On The Combustion Head - Riello RS 55/E BLU Installation, Use And Maintenance Instructions

Combustion
If the combustion values found at the start of the intervention do
not satisfy current standards or anyway indicate a poor state of
combustion (consult the table below), contact the Technical As-
sistance Service for the necessary adjustments.
EN 676
Max. output
Theoretical
max. CO
GAS
2
0 % O
2
G 20 11.7
G 25 11.5
G 30 14.0
G 31 13.7
7.2.3

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 Op-
erator Panel visualises "30%" (see "Parameter list" at page 45,
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 - see
Fig. 38.
Carefully check the polarities!
WARNING
7.2.4 Checking the air and gas pressure on the
combustion head
To carry out this operation a pressure gauge must be used to
mesure the air and gas pressure at the combustion head, as
shown in Fig. 39.
After checking the gas pressure, remember to
close the small bleed screw located on the plug.
DANGER
20068446
Air excess
Max. output
  1.2   1.3
CO % Calibration
2
mg/kWh
 = 1.3
 = 1.2
 1000
9.7 9
 1000
9.5 8.8
 1000
11.6 10.7
 1000
11.4 10.5
Maintenance
CO
D8154
Tab. R
+
Checking
gas pressure
D8155
52 GB
_
+
Checking
air pressure
Fig. 38
_
Fig. 39