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Model 

Riello RDB2 

Ignition 

8 kV / 16 mA 

Electrical supply 

230/280 V 

– 50 Hz fused at 5A 

Control box 

RBL 535 SE/LD analogue 

Motor 

RBL 90W 

Pump 

RBL 

Rpm 

2,700 

Fuel 

Kerosene C2 

Capacitor 

4.5 mF 

 

 

 

 

 

Output 

Input 

Nozzle 

Pump 

pressure 

Primary air 

damper 

Secondary 
air damper 

CO

2

 

15.0 kW·h 

50,000 Btu·h 

15.5 kW·h 

52,860 Btu·h 

0.45 x 60ºES 

110 psi 

7.6 bar 

2.0 

11.0% 

17.5 kW·h

*

 

60,000 Btu·h 

19.1 kW·h 

64,993 Btu·h 

0.5 x 80ºEH 

130 psi 

9 bar 

4.0 

11.3% 

20.5 kW·h 

70,000 Btu·h 

22.1 kW·h 

75,528 Btu·h 

0.6 x 80ºEH 

130 psi 

9 bar 

4.0 

11.5% 

20.5 kW·h 

70,000 Btu·h 

22.1 kW·h 

75,528 Btu·h 

0.6 x 80ºEH 

130 psi 

9 bar 

3.0 

11.5% 

23.4 kW·h

*

 

80,000 Btu·h 

25.0 kW·h 

85,350 Btu·h 

0.65 x 80ºEH 

135 psi 

9.3 bar 

5.0 

11.5% 

26.3 kW·h 

90,000 Btu·h 

28.3 kW·h 

96,374 Btu·h 

0.75 x 80ºEH 

135 psi 

9.7 bar 

5.5 

11.5% 

29.0 kW·h 

100,000 Btu·h 

31.5 kW·h 

107,441 Btu·h 

0.85 x 80ºEH 

130 psi 

9 bar 

4.5 

12.0% 

32.8 kW·h

*

 

112,000 Btu·h 

35.3 kW·h 

120,500 Btu·h 

1.0 x 80ºEH 

110 psi 

7.6 bar 

4.0 

12.0% 

36.0 kW·h 

125,000 Btu·h 

39.2 kW·h 

133,712 Btu·h 

1.1 x 80ºEH 

125 psi 

9 bar 

4.5 

12.0% 

 

Note 1

 The primary air damper should remain at the position indicated. The secondary air damper settings are 

for guidance only; individual site conditions

—such as the type of flue and level of draught—will often compel 

deviation from the recommended positions. See 

fig 3

 for air damper adjustment instructions.  

 

Note 2

 The CO

2

 ratio is correct for a combustion air temperature of 20°C; see 

fig 2

 for other temperatures.

 

 

Note  3

 The 

*

 indicates factory settings. To attain different outputs, changes to the nozzle specification, pump 

pressure  and  air  setting  may  be  required.  The  boiler  should  be  set  to  match  the  heat  requirements  of  the 
system. Incorrect matching may impede the boiler's correct operation and invalidate its warranty. 

BURNER SETUP

 

Fig 1 

TECHNICAL SPECIFICATIONS

 

Summary of Contents for RDB2

Page 1: ...15 20 kW 20 26 kW 29 36 kW Please read these instructions carefully before commissioning and using this appliance To be retained by the householder Burner Setup Details Riello RDB2 ...

Page 2: ...her exposed areas When disposing of materials limit dust and the risk of inhalation by using a water spray Ensure materials are securely wrapped Seek urgent medical attention if inhaled or ingested Exposure to eyes and skin should be followed by immediate cleansing of the affected areas and medical attention if necessary Glues Sealants and Paints The glues sealants and paints used present no known...

Page 3: ... Page no Technical specifications 4 Burner setup 4 Combustion air adjustment 5 Oil pump 6 Nozzle replacement 7 Electrode positions 8 Burner removal 8 Control box wiring removal 9 Fault finding 10 11 Spares 12 13 ...

Page 4: ... 31 5 kW h 107 441 Btu h 0 85 x 80ºEH 130 psi 9 bar C 4 5 12 0 32 8 kW h 112 000 Btu h 35 3 kW h 120 500 Btu h 1 0 x 80ºEH 110 psi 7 6 bar E 4 0 12 0 36 0 kW h 125 000 Btu h 39 2 kW h 133 712 Btu h 1 1 x 80ºEH 125 psi 9 bar E 4 5 12 0 Note 1 The primary air damper should remain at the position indicated The secondary air damper settings are for guidance only individual site conditions such as the ...

Page 5: ...Allen key provided The air setting will be indicated in the display window COMBUSTION AIR AIR DAMPER ADJUSTMENT To conform to Efficiency Directive 92 42 EEC the concentrations of CO and CO2 in the flue gases must be verified As combustion air can be taken from the room in which the boiler is situated or from outside there may be variations in the ratio depending on the combustion air temperature U...

Page 6: ...tion lift is necessary A second flexible hose will be required and the oil pump must first be converted for use Remove the return line plug 2 insert the bypass screw 3 and connect a second flexible oil line not supplied Single pipe oil supplies with a de aerator Where a two pipe suction lift is required but it is not feasible to fit a return pipe an oil de aerator can be used The burner should be ...

Page 7: ...the electrodes remove the nozzle with an appropriate socket or box spanner fig 6 6 Fit a new nozzle of the same specification 7 Replace the flame ring in the same position check the electrode positions fig 7 and tighten 8 Refit the blast tube Fig 5 Fig 6 NOZZLE REPLACEMENT 1 Blast tube retaining screws x2 2 Oil pump 3 Control box 4 Reset button light 5 Mounting flange gasket 6 Air damper fine tuni...

Page 8: ...ng the nozzle loosen the screw B and move the electrodes ahead Fig 7 To remove the burner 2 unscrew the nut that holds it to the mounting flange 1 and pull away leaving the mounting flange and gasket 5 attached to the boiler 4 To remove replace the flange and gasket undo the retaining nuts 3 ...

Page 9: ... Mains switch ST Limit thermostat RT Control thermostat Fig 10 To remove the control box 1 Loosen the screw 1 and open lid 2 2 Remove all components 3 Remove the solenoid valve 3 4 Loosen the two retaining screws 4 5 Disconnect the ignition leads and remove the control box ...

Page 10: ...hotocell not seeing flame Clean photocell check for damage ensure it is fully inserted replace as necessary Low oil pressure Check pump pressure and adjust Morning start lock out Faulty non return valve or air leak Replace non return valve repair leak Low voltage to the boiler Check with electricity supplier to remedy Incorrect combustion settings Check combustion under normal running conditions s...

Page 11: ...11 Fig 11 Burner Fault finding Logic Chart ...

Page 12: ... TBC TBC TBC 224796 TBC 17 Pump o ring TBC TBC TBC TBC 224797 TBC 18 Pump filter o ring TBC TBC TBC TBC 224798 TBC 19 Oil line connector TBC TBC TBC TBC 224799 TBC 20 Flexible oil line TBC TBC TBC TBC 224800 TBC 21 Oil supply pipe TBC TBC TBC TBC 224801 TBC 22 Pressure gauge connector TBC TBC TBC TBC 224802 TBC 23 Pump drive coupling TBC TBC TBC TBC 224803 TBC 24 Solenoid valve TBC TBC TBC TBC 224...

Page 13: ...13 Fig 12 ...

Page 14: ...strations contained within are vested in TR Engineering Ltd and neither the brochure nor any part thereof may be reproduced without prior written consent TR Engineering s policy is one of continuous research and development This may necessitate alterations to this specification Instructions correct at time of going to print January 2011 Item No 224812 Issue No 1 Rev 0 ...

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