Worcester Bosch Burner Assembly RDB-2.2 12/18kW 87186864130

The Worcester Bosch 87186864130 is a complete burner assembly built around the Riello RDB-2.2 burner platform, rated for 12/18kW output. It is the unit that mixes fuel and air, delivers the flame into the combustion chamber and carries the ignition and flame-sensing components on the Worcester Bosch Greenstar Heatslave II oil-fired combi range. The assembly is supplied as a Worcester Bosch spare and is covered by the manufacturer's guarantee.

• The boiler locks out repeatedly and will not establish or hold a flame.
• Ignition is erratic, with delayed light-up or a pulsing start.
• The flame burns yellow or lazy instead of a clean, steady shape.
• Soot deposits build up on the burner head, blast tube or combustion chamber.
• Flue gas readings drift outside the expected CO2 and CO figures for the appliance.

• Confirm the appliance model and serial number against the compatibility list, as the 12/18kW Heatslave II uses this RDB-2.2 assembly.
• Note the alternative number 2238715 when cross-referencing older documentation or stock records.
• Check whether the burner gasket or seal at the mounting flange needs renewing at the same time.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.