Final Checks; Maintenance - Riello RL 70/M Installation, Use And Maintenance Instructions

(A)
(B)
D1232
(D)
(E)
D1233
X
dimension

FINAL CHECKS

• Obscure the photocell and switch on the control
devices: the burner should start and then lock-out
about 5 s after starting.
• Illuminate the photocell and switch on the control
devices: burner should go into lock-out.
• Obscure the photocell while the burner is operating:
flame should go out and burner lock out within 1 s.
• Switch off control devices while the burner is operat-
ing: the burner should stop.

MAINTENANCE

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
D707
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 measure permits the
cause of the anomaly 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
installed up-line from the filter and consequently will not
indicate whether the filter is clogged or not. If the prob-
lem lies in the suction line, check to make sure that the
filter is clean and that air is not entering the piping.
Servomotor
Disengage the cam 4)(A)p.10 from the servomotor and
turn it backwards and forwards by hand to make sure it
moves freely.
Filters (A)
Check the following filters:
• on line 1) • in pump 2) • at nozzle 3), and clean or
D709
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.
Replace the nozzles every 2-3 years or whenever nec-
essary. Combustion must be checked after the nozzles
have been changed.
Photocell (cad cell) (B)
Clean the glass cover from any dust that may have
accumulated. Photocell 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.
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
- Loosen screws 1) and withdraw the cover 2)
- Unscrew screws 3)
- Fit the two extensions 4) supplied with a kit on request
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)
As per fig. (E), dimension X should set as follows:
RL70/M -
RL100/M -
RL130/M -
D2854
14
"
1 / 2
"
5 / 16
"
7 / 16