Maintenance - Riello RL 28/M Electrical Installation, Use And Maintenance Instructions

(A)
(B)
D2532
(D)
D875
(E)
D482
D484
X
dimension
14

MAINTENANCE

All the installation, maintenance and
disassembly operations must be carried
out with the electricity supply disconnected.
PERICOLO
The installation of the burner must be
carried out by qualified personnel, as
indicated in this manual and in compliance
with the standards and regulations of the
ATTENZIONE
laws in force.
Combustion
An analysis of the flue gases at the boiler outlet is
required. Significant differences with respect to the pre-
vious measurements indicate the points where more
care should be exercised during maintenance.
Pump
The pump delivery pressure must be stable at 290 PSI.
The suction must be less than 6.5 PSI.
Unusual noise must not be evident during pump opera-
tion.
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 test permits the cause of the anom-
aly to be traced to either the suction line or the pump.
If the pump is found to be responsible, check to make
sure that the filter is not dirty. The vacuum gauge is in-
stalled up-line from the filter and consequently will not in-
dicate whether the filter is clogged or not.
If the problem lies in the suction line, check to make sure
that the filter is clean and that air is not entering the pip-
ing.
Servomotor
Disengage servomotor and turn it backward and forward
by hand to make sure it is free moving.
Filters (A)
Check the following filters:
• on line 1) • in pump 2) • at nozzle 3),
and clean or replace as required.
If rust or other impurities are observed inside the pump,
(C)
use a separate pump to suck out any water and other
impurities that may have deposited on the bottom of the
tank.
Combustion head
Check to make sure that all the parts of the combustion
head are in good condition, positioned correctly, free of
all impurities, and that no deformation has been caused
by operation at high temperatures.
Nozzle
Do not clean the nozzle orifices.
It is advisable to replace nozzles once a year during
periodical maintenance. Combustion must be checked
after the nozzles have been changed.
Flame sensor (cad sensor) (B)
Clean the glass cover from any dust that may have
accumulated. Flame sensor 1) is held in position by a
pressure fit and can therefore be removed by pulling it
outward.
Flame inspection window (C)
Clean the glass.
Flexible hoses
Check to make sure that the flexible hoses are still in
good condition.
Fuel tank
Every 5 years, or whenever necessary, suck out any
water or other impurities present on the bottom of the
tank using a separate pump.
Burner
Make sure that the screws are fully tightened.
TO OPEN THE BURNER (D):
- switch off the electrical power.
- Remove screw 1 and withdraw the casing 2).
- Unscrew screw 3).
- Fit the two extensions 4) supplied with the burner onto
the slide bars 5) (models with long blast tube).
- Pull part A backward keeping it slightly raised to avoid
damaging the disk 6) on blast tube 7).
Fuel pump and/or couplings replacement (E)
See fig. (E). Dimension X should be set as follows:
RL28/M - "
1 / 4
RL38/M - "
3 / 16
D2854
RL50/M - "
5 / 16