Riello 20155654, Installation, Use And Maintenance Instructions

Page: 61 / 84

59 20155699 GB
Maintenance
Gas filter
Change the gas filter when it is dirty.
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases.
Significant differences with respect to the previous measure-
ments indicate the points where most care should be exercised
during maintenance.
If the combustion values measured before starting maintenance
do not comply with applicable legislation or do not indicate effi-
cient combustion, consult the 9.2.6 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 9.2.6.
Tab. V
9.2.4 QRI flame sensor
In order to reach the flame detector, proceed as follows:

extract the QRI flame sensor 1)(Fig. 99);

clean the glass cover from any dust that may have accumu-
lated.
9.2.5 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. 100.
9.2.6 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.
Tab. W
EN 676
Air excess
Max. output

1.2
Min. output

1.3
GAS
CO
2
theoretic
al max. 0% O
2
CO
2
% Calibration
CO
NO
X

= 1.2

= 1.3 mg/kWh mg/kWh
G 20 11.7 9.7 9.0

100

170
G 25 11.5 9.5 8.8

100

170
G 30 14.0 11.6 10.7

100

230
G 31 13.7 11.4 10.5

100

230
Fig. 99
1
20131505
Safety component Life cycle
Flame control
10 years or 250.000
operation cycles
Flame sensor
10 years or 250.000
operation cycles
Gas valves (solenoid)
10 years or 250.000
operation cycles
Pressure switches
10 years or 250.000
operation cycles
Pressure adjuster 15 years
Servomotor (electronic
cam)(if present) 10 years or 250.000
operation cycles
Oil valve (solenoid)
(if present) 10 years or 250.000
operation cycles
Oil regulator (if present)
10 years or 250.000
operation cycles
Oil pipes/ couplings
(metallic)(if present)
10 years
Flexible hoses (if present)
5 years or 30.000 pressurised
cycles
Fan impeller 10 years or 500.000 start-ups
20076586
Checking
air pressure
Checking
gas pressure
Fig. 100