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(A)
(B)
(D)
(E)
D482
D483
X
dimension
FINAL CHECKS
• Obscure the flame sensor and switch on the burner:
the burner should start and then lock-out about 5 s af-
ter opening of the low fire nozzle valve.
• Illuminate the flame sensor and reset the burner: the
burner should go into lock-out .
• Obscure the flame sensor while the burner is in high
fire operation, 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 operating control while the burner is running:
the burner should stop.
MAINTENANCE
Combustion
An analysis ot 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 174 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 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.
Filters (A)
Check the following filters:
• on line 1) • at nozzle 3), pump 2) and clean or replace
as required.
If rust or other impurities are observed inside the pump,
use a separate pump to suck out any water and other
impurities that may have deposited on the bottom of the
D484
tank.
Fan
(C)
Check to make sure that no dust has accumulated
inside the fan or on its blades, as this condition will
cause a reduction in the air flow rate and create incom-
plete combustion.
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.
Nozzles
Do not clean the nozzle orifices.
It is advisable to replace nozzles every year during regu-
lar maintenance operations. Combustion must be
D486
checked after the nozzles have been changed.
Flame sensor (cad sensor) (B)
Clean the glass cover from any dust that may have
accumulated. Sensor 1) can be removed by pulling it
outward forcefully.
Flame inspection window (C)
Clean the glass.
Flexible hoses
Check to make sure that the flexible hoses are still in
good condition.
Boiler
Clean the boiler as indicated in its accompanying
instructions in order to maintain all the original combus-
tion characteristics intact, especially the flue gas tem-
perature and combustion chamber pressure. Lastly,
check the condition of the flue gas stack.
TO OPEN THE BURNER (D)
- Switch off the electrical power.
- Loosen screws 1) and withdraw the cover 2).
- Unscrew screws 3).
- Fit the two extensions 4) supplied with the burner onto
the slide bars 5) (model with long blast tube, obtaina-
ble with the kit).
- 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:
RL28/2 -
RL38/2 -
D2854
RL50/2 -
11
1 / 4
"
5 / 32
"
"
5 / 32
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