Safety Components; Checking The Air And Gas Pressure On The Combustion Head - Riello RS 68/EV O2 ULX Installation, Use And Maintenance Instructions

Gas leaks
Make sure that there are no gas leaks on the pipes between the
gas meter and the burner.
Gas filter
Replace the gas filter when it is dirty.
Flame inspection window
Clean the glass of the flame inspection window.
Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics intact,
especially the flue gas temperature and combustion chamber
pressure.
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 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
CO
CO theoretic
2
2
GAS
al max. 0% O
 = 1.2
2
G 20 11.7 9.7
G 25 11.5 9.5
6.2.4

Safety components

The safety components should be replaced at the end of their life
cycle indicated
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
20205796
Air excess
Min. output
  1.2   1.3
% Calibration
CO
 = 1.3 mg/kWh mg/kWh
9.0  100
8.8  100
in Tab.
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
6.2.5 Checking the air and gas pressure on the
combustion head
To carry out this operation a pressure gauge must be used to
measure the air and gas pressure at the combustion head, as
shown in Fig. 39 and Fig. 40.
Air pressure in
absolute mode
NO
X
 170
 170
Tab. P
Q.
Tab. Q
42 GB
+
_ _
Checking
Checking
air pressure gas pressure
+
_
Air pressure in
differential mode
20209399
+
_
Fig. 39
20209377
+
_
Fig. 40