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APPENDIX A1
RDB BLU BURNER INFORMATION
A1.1 GENERAL
All Grant VortexBlue boilers are fitted with a Riello RDB BLU blue
flame burner. This has been designed to operate with reduced
NOx emissions that meet the European Ecodesign emissions
regulations.
From September 2018 the maximum permissible NOx level for oil
fired boilers is 120mg/kWh. All Grant VortexBlue boilers, fitted with
the Riello RDB BLU burner, will operate well below this minimum
level and thus fully comply with these emissions regulations when
they come into effect.
A1.2 BURNER FEATURES
The Riello RDB BLU blue flame burner fitted to the Grant
VortexBlue boilers is very similar to the Riello RDB 'yellow flame'
burners, such as those fitted to the Vortex range of oil fired
boilers.
The main differences with the blue flame burner are as follows:
•
An Ultra Violet (UV) sensor is used - the blue flame cannot
be detected by the usual photocell.
•
A digital control box is used - the UV cell cannot be used with
the usual “analogue” control box.
•
A clear reset button (on the control box) with burner status
and fault identification by the use of different coloured
indicator lights.
•
A longer combustion head – to allow the necessary
recirculation of the combustion gases.
•
A post purge following flame shut off – requiring a permanent
live to the burner in addition to the usual switched live.
3
9
5
6
10
4
1
7
8
2
Figure A1-1:
Burner components
Table A1-1:
Burner components key
Key
Description
1
Oil pump
2
Digital control box
3
Reset push-button with lockout lamp
4
Flange with insulating gasket
5
Air damper adjustment screw
6
Snorkel (balanced flue)
7
Pump pressure adjustment screw
8
Pressure gauge port
9
UV sensor
10
Combustion head
! WARNING !
The burner and flange are matched.
If the burner is changed, the correct flange for the
replacement burner MUST be fitted.
Refer to Section 13 (Spare Parts).
Appendix A1: RDB BLU Burner Information
