Inspection and maintenance
Greenstar Utility
ErP -
6 720 821 751 (2018/04) 39
Riello RDB 3.2 BT (50/70)
▶ To remove the blast tube [1] loosen the fixing screws [2] and remove
the blast tube.
▶ Disconnect the cables [5] from the electrodes [6].
▶ To remove the diffuser disc-holder assembly from the nozzle-holder
[4], loosen the retaining screw [3].
▶ Secure the nozzle-holder [7] in position with a spanner and with
another spanner remove the nozzle.
▶ Still securing the nozzle holder with the spanner, fit a new nozzle and
tighten with the other spanner.
▶ Reconnect the cables [5] to the electrodes [6]
▶ Reassemble the diffuser disc-holder assembly onto the nozzle holder
and secure with the retaining screw [3].
▶ Refit the blast tube [1] and secure with the screws [2]
▶ Check that the combustion head setting is correct for the output of
your appliance, refer to table 14 for the correct setting.
▶ Check the alignment of the electrodes, refer to section 6.5.2 for the
correct settings.
Fig. 60 Riello RDB 3.2 BT maintenance position
7.4.6 Oil pump
▶ Verify the pump pressure.
– In case of anomalies check the oil filter and the oil supply line.
▶ Check the internal pump filter and clean if clean if necessary.
7.4.7 External oil filter
▶ Remove the paper element from the external oil filter and replace it.
If the filter contains a washable element, thoroughly clean in
kerosene and reassemble into the filter.
7.5 Re-commission the burner
▶ Fit a suitable pressure gauge and a vacuum gauge on the oil pump.
▶ Slide the burner into position in the heat exchanger and secure with
the retaining nut on top of the burner.
▶ Reposition the flexible air supply tube over the burner air supply
connection.
– Secure the flexible air supply tube in place with the hose clamp.
▶ Plug the burner lead into the control box.
▶ Create a demand:
▶ Run the appliance for approximately 10 minutes uninterrupted
before re-commissioning the burner.
▶Check:
– Oil pressure is correct for the required appliance output.
– Bacharach (smoke) reading is between 0 -1.
▶ If the Bacharach (smoke) reading is above 1:
– Check the air settings
▶ If the air setting is correct:
– Check that the burner has been reassembled correctly
Allow the appliance to warm up then:
▶ Ensure that the CO
2
levels are correct as indicated in the burner
settings data table.
– Adjust the CO
2
if necessary using the air damper.
▶ Check the flue gas temperature are close to the values in the burner
settings data table.
– If the flue gas temperature is too high and the baffles are correctly
fitted, then reduce the oil pump pressure 5-10 p.s.i. (0.35-0.67
bar) to compensate for oil nozzle variations.
When the combustion settings are correct:
▶ Remove the pressure gauge and refit the blanking plug.
▶ Refit the plastic cover.
Before hand over
▶ Ensure the oil flexible line/s are routed correctly so to avoid being
damaged or trapped.
▶ Ensure that the rigid 90° connection at the pump points to the entry
point of the oil supply into the appliance when the appliance is
viewed from the front.
6720821571-45.1Wo
1
5
4
6
2
3
WARNING: Flue gas leakage
The seal between the burner and the mounting flange
must form a gas tight seal to prevent leakage of
potentially dangerous gases from the combustion
chamber.
▶ Unless the burner is level when pushing the burner
into the flange the O ring may not seat properly
allowing flue gas to escape! The retaining nut may not
pull the burner into the flange. The burner must be
fully engaged in the flange before the retaining nut is
fitted and tightened
▶ Always check that the O-ring seal is in good condition
before fitting the burner. Replace the O-ring seal if
defective.
Combustion and burner settings
▶ Combustion and burner settings refer to section 6.5,
they contain the settings and adjustment details for
the burner.
▶ For the operation check of the burner refer to section
6.4.6.
▶ For full details on burner commissioning check refer
to section 6.4.5.
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