Maintenance - Riello RL 22 BLU Installation, Use And Maintenance Instructions

D836
(A)
(B)
(D)
D1108
(E)
D1763
15

MAINTENANCE

Pump
The pressure must be stable and at the same
level as measured during the previous check.
The depression must be less than 0.45 bar. Val-
ues different from those measured previously
may be due to a different level of fuel in the tank.
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 de-
tached 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 vacuum
meter is installed upstream from the filter and
consequently 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.
Filters (A)
Check the following filter boxes:
• on line 1) • in the pump 2) • at the nozzle 3), and
clean or replace as required.
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.
Then clean the insides of the pump and the cover
sealing surface.
Fan
Check to make sure that no dust has accumulat-
ed inside the fan or on its blades, as this condi-
tion will cause a reduction in the air flow rate and
provoke polluting combustion.
Combustion head
Check to make sure that all the parts of the com-
bustion head are in good condition, positioned
correctly, free of all impurities, and that no defor-
mation has been caused by operation at high
D484
temperatures.
Nozzles
Do not clean the nozzle openings; do not even
(C)
open them. The nozzle filters however may be
cleaned or replaced as required.
It is advisable to replace nozzles every year dur-
ing regular maintenance operations or whenever
necessary.
Combustion must be checked after the nozzles
have been changed.
UV Sensor (B)
To extract the UV sensor 1) loosen the screws 2)
and unhook the support 3).
Flame inspection window (C)
Clean the glass whenever necessary.
D837
Flexible hoses
Check to make sure that the flexible hoses are
still in good condition and that they are not
crushed or otherwise deformed.
Light oil fuel supply line
If the previous checks have suggested that air
may be entering the circuit somewhere, pressur-
ize the circuit piping.
Fuel tank
Approximately every 5 years, or whenever nec-
essary, suck any water or other impurities pres-
ent on the bottom of the tank using a separate
pump.
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.
Lastly, check the condition of the flue gas stack.
To open the burner (D)
- Switch off the electrical power.
- Remove screw 1) and withdraw the casing 2).
- Unscrew screw 3).
- Pull part A backward keeping it slightly raised
to avoid damaging the flameholder 6) on blast
tube 7).
Fuel pump and/or couplings replacement (E)
In conformity with fig. (E).