Final Checks; Maintenance - Riello RS 190 Installation, Use And Maintenance Instructions

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
D709
should be exercised during maintenance.
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 5)(B).
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 terminal strip are fully tightened.
Clean the outside of the burner, taking special
care with the transmission joints and cam
4)(A)p.14.
Combustion
D3041
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.
- Loosen screws 1) and withdraw cover 2).
- Disengage the articulated coupling 7) from
the graduated sector 8).
- Fit the two standard supplied extensions onto
the slide bars 4).
- Remove screws 3), and pull the burner back
by about 100 mm on the slide bars 4). Discon-
nect the probe and electrode leads and then
pull the burner fully back.
Now extract the gas distributor 5) after having
removed the screw 6).
TO CLOSE THE BURNER (B):
- 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 screws 3), and pull the probe and elec-
trode leads gently out until they are slightly
stretched.
- Re-couple the articulated coupling 7) to the
graduated sector 8).
- Remove the two extensions from the slide
bars 4).
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