Riello Bio RLS 68/M Installation, Use And Maintenance Instructions page 36

Servomotor
Disengage the cam 4)(Fig. 40 at page 30) from the servomotor,
by pressing and moving button 3)(Fig. 41) towards the right, and
turn it backwards and forwards by hand to make sure it moves
freely.
Now engage the cam again by moving the button 2)(Fig. 41) to
the left.
Burner
Check for excess wear or loose screws in the mechanisms con-
trolling the air gate valve and the gas butterfly valve.
Also make sure that the screws securing the electrical leads in
the burner terminal strip are fully tightened.
Clean the outside of the burner, taking special care with the trans-
mission joints and cam 4)(Fig. 40 at page 30).
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 OIL OPERATION
Filters
Check the filtering baskets on line and at nozzle present in the
system. Clean or replace if necessary.
If rust or other impurities are observed inside the pump, use a
separate pump to lift any water and other impurities that may
have deposited on the bottom of the tank.
Pump
The delivery pressure must be stable. The depression must be
less than 0.4 bar.
Unusual noise must not be evident during pump operation.
If the pressure is found to be unstable or if the pump runs noisily,
the flexible hose must be detached from the line filter and the fuel
must be sucked from a tank located near the burner.
This measure permits the cause of the anomaly to be traced to
either the suction piping or the pump.
If the pump is found to be responsible, check to make sure that
the filter is not dirty.
The vacuometer is installed upstream from the filter and conse-
quently will not indicate whether the filter is clogged or not.
Contrarily, if the problem lies in the suction line, check to make
sure that the filter is clean and that air is not entering the piping.
Please check that the supply line and filters are clear.
The use of a pump vacuum gauge will assist in this.
This measure permits the cause of the anomaly to be traced to
either the suction line or the pump.
If the problem lies in the suction line, check to make sure that the
filter is clean and that air is not entering the piping.
Hoses
 Check periodically the flexible pipes conditions.
They have to be replaced at least every 2 years.
 In case of use of gas oil and bio fuel blends, it is strongly rec-
ommended to inspect even more frequently the hoses and
replace them where contamination has occurred.
 Check to make sure that the hoses are still in good condi-
tion.
Nozzles
Do not clean the nozzle openings; do not even open them.
The nozzle filters however may be cleaned or replaced as re-
quired.
20034985
Maintenance
It is advisable to replace nozzles every year during regular main-
tenance operations.
Combustion must be checked after the nozzles have been
changed.
Fuel tank
If water or contamination is present within the fuel tank, it is es-
sential that this is removed before the equipment is to be used.
This is extremely important when gas oil containing Bio diesel is
in use. If in doubt about how to achieve this then please contact
the fuel or oil tank supplier.
Combustion
In case the combustion values found at the beginning of the inter-
vention do not respect the standards in force or, in any case, do
not correspond to a proper combustion, contact the Technical
Assistant and have him carry out the necessary adjustments.
EN 267
Theoretical max. CO
0 % O
2
15.2
Gas leaks
Make sure that there are no gas leaks on the pipework between
the gas meter and the burner.
Gas filter
Change the gas filter when it is dirty.
Combustion
In case the combustion values found at the beginning of the inter-
vention do not respect the standards in force or, in any case, do
not correspond to a proper combustion, contact the Technical
Assistant and have him carry out the necessary adjustments.
EN 676
Theoretical max.
GAS CO
0 % O
G 20 11.7
G 25 11.5
G 30 14.0
G 31 13.7
34 GB
Excess air
Max output
  1.2
Calibration CO %
2
2
 = 1,2  = 1,3
12.6 11.5
GAS OPERATION
Excess air
Max output
  1,2
Calibration
CO %
2
2
 = 1,2  = 1,3
2
9.7 9.0
9.5 8.8
11.6 10.7
11.4 10.5
Min output
  1.3
CO
mg/kWh
 100
Min output
  1,3
CO
mg/kWh
 100
 100
 100
 100