Final Checks; Maintenance - Riello RL 34/1 MZ Instrucciones De Instalación, Funcionamiento Y Mantenimiento

(A)

FINAL CHECKS

• Obscure the photocell and switch on the con-
trol devices: the burner should start and then
lockout about 5 s after opening of the 1st noz-
zle operation valve.
• Illuminate the photocell and switch on the con-
trol devices: the burner should start and then
go into lockout after about 10 s.
• Obscure the photocell while the burner is oper-
ating, the following must occur in sequence:
flame extinguished within 1 s, pre-purging for
about 20 s, sparking for about 5 s, burner goes
into lock-out.
• Switch off control device TL while the burner is
operating: the burner should stop.

MAINTENANCE

!
technician in conformity with legislation and
local standards.
D482
!
excessive consumption of fuel and consequent
pollution.
!
to the burner acting on the main switch of the
system.
Combustion
The optimum calibration of the burner requires
an analysis of the flue gases. Significant differ-
ences with respect to the previous measure-
ments indicate the points where more care
should be exercised during maintenance.
Pump
The delivery pressure must be stable at 12 bar.
The depression must be less than 0.45 bar. Unu-
sual 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 vacuom-
eter is installed upstream from the filter and con-
sequently 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.
Fan
Check to make sure that no dust has accumu-
lated inside the fan or on its blades, as this con-
dition 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
temperatures.
Nozzles
Do not clean the nozzle openings.
It is advisable to replace nozzles every year dur-
ing regular maintenance operations.
The change of nozzle requires the combustion to
be controlled.
Photocell
Clean the glass cover from any dust that may
have accumulated. To extract the photocell 4)
(A)p.3 pull it outward forcefully. it is only pressed
in.
Flexible hoses
Check to make sure that the flexible hoses are
still in good condition and that they are not
crushed or otherwise deformed.
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.
12
The burner requires periodic maintenance
carried out by a qualified and authorised
Periodic maintenance is essential for the
reliability of the burner, avoiding the
Before carrying out any cleaning or control
always first switch off the electrical supply