Final Checks; Maintenance - Riello RS 28 Instrucciones De Instalación, Funcionamiento Y Mantenimiento

FLAME INSPECTION WINDOW
(A)
OPENING THE BURNER
(B)
FINAL CHECKS (with burner running)
• Disconnect one of the wires on the minimum
gas pressure switch:
• Open remote control device TL:
• Open remote control device TS:
the burner must stop
• Disconnect the common wire P from the air
pressure switch:
• Disconnect the ionisation probe lead:
the burner must lock out
• Make sure that the mechanical locking sys-
tems on the various adjustment devices are
fully tightened.

MAINTENANCE

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.
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Gas leaks
Make sure that there are no gas leaks on the
pipework between the gas meter and the burner.
Gas filter
Change the gas filter when it is dirty.
Flame inspection window
Clean the flame inspection window (A).
Combustion head
Open the burner and make sure that all compo-
nents of the combustion head are in good condi-
tion, not deformed by the high temperatures,
free of impurities from the surroundings and cor-
rectly positioned. If in doubt, disassemble the
elbow fitting 7)(B).
Servomotor
Disengage the cam 4)(A)p.14 from servomotor,
by turning slot 2)(A)p.14 through 90° and turn it
backward and forward by hand to make sure it is
free moving. Now engage cam 4)(A)p.14 again.
Burner
Check for excess wear or loose screws in the
mechanisms controlling the air gate valve and
the gas butterfly valve. Also make sure that the
screws securing the electrical leads in the
burner connections are fully tightened.
Clean the outside of the burner, taking special
care with the transmission joints and cam
4)(A)p.14.
Combustion
Adjust the burner if the combustion values found
at the beginning of the operation do not comply
with the regulations in force, or at any rate, do
not correspond to good combustion. Use the
appropriate card to record the new combustion
values; they will be useful for subsequent con-
trols.
TO OPEN THE BURNER (B):
- Switch off the electrical power.
- Remove screw 1) and withdraw cover 2).
- Disengage the articulated coupling 3) from
the graduated sector 4).
- Remove screw 5), the split pin 9) and pull the
burner back by about 100 mm on the slide
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bars 6). Disconnect the probe and electrode
leads and then pull the burner fully back.
- Turn the burner as shown in the figure and fit
the split pin 9) into one of the slide bar holes
so that the burner remains in position.
Now extract the gas distributor 7) after having
removed the screw 8).
TO CLOSE THE BURNER (B):
- Remove the split pin 9) and push the burner
until it is about 100 mm from the sleeve.
- Re-connect the leads and slide in the burner
until it comes to a stop.
- Refit screw 5), the split pin 9) and pull the
probe and electrode leads gently out until
they are slightly stretched.
- Re-couple the articulated coupling 3) to the
graduated sector 4).
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