Inspection and maintenance
Greenstar Utility
ErP -
6 720 821 751 (2018/04)
38
7.4.3
Fan and housing cleaning
▶ Loosen the two Allen screws and remove the air intake cover and
clear any debris from the air intake and air damper.
▶ Note the position of the air damper adjustment and check the air
damper moves freely.
▶ Note the position of the air damper disc and clean if necessary.
▶ Loosen the four Allen screws to disassemble the burner to allow
access to the impeller.
▶ Check the condition of the gaskets between these parts and replace
is necessary.
▶ Clean both sides of the impeller and remove any debris from the
burner housing.
▶ Check the impeller rotates freely.
▶ Reassemble the components.
7.4.4
Photocell cleaning
▶ Withdraw the photocell from its housing and wipe clean and replace
into the housing.
7.4.5
Combustion head maintenance and nozzle replacement
▶ Disassemble the combustion head from the burner and verify that all
components are in good condition, dirt and soot free and correctly
positioned.
▶ Clean the combustion head.
▶ Verify the position of the electrodes.
▶ Replace nozzle.
Riello RDB 3.2 BX (32/50)
▶ To remove the blast tube [1], loosen the three screws [2] from the
collar and remove the blast tube.
▶ To disconnect the electrode cables [6], loosen the screw [8] and
disconnect the electrode cables.
▶ Remove the electrode-stabiliser unit [3].
▶ Secure the nozzle-holder [7] in position with a spanner and with
another spanner remove the nozzle [4].
▶ Still securing the nozzle holder [7] with the spanner, fit a new nozzle
and tighten with the other spanner.
▶ Reconnect the electrode cables [6] and tighten screw [8] to secure.
▶ Reassemble the electrode-stabiliser unit [3].
▶ Replace the blast tube [1] and tighten the three screws [2] to secure
▶ Check that the combustion head setting is correct for the output of
your appliance, refer to table 13 for the correct setting.
▶ Check the alignment of the electrodes, refer to section 6.5.2 for the
correct settings.
Fig. 59 Riello RDB 3.2 BX maintenance position
CAUTION:
▶ Ensure that no dust has accumulated inside the fan
or on its blades, as this condition can cause a
reduction in the air flow rate, resulting in incomplete
combustion.
NOTICE:
Do not dismantle the oil nozzle or clean the oil
nozzle tip.
▶ It is recommended that the oil nozzle is replaced at
every annual service.
NOTICE:
For safe and efficient operation.
▶ Only use the specified/recommended oil nozzles.
NOTICE:
Always check the position of electrodes after
having replaced the oil nozzle.
An incorrect position could cause ignition troubles.
▶ After refitting the blast tube, check that the electrode
gaps are correct.
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