Bosch Worcester 28CDi User Instructions

Bosch Worcester 28CDi User Instructions

Bosch appliances boiler user manual
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24CDi, 28CDi & 35CDi II
24CDi Fanned Flued (RSF)
24CDi Balanced Flued (BF)
24CDi Open Flued (OF)
28CDi Fanned Flue (RSF)
35CDi II Fanned Flue (RSF)
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Worcester supports the
Benchmark code of practice
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47 311 31
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  Summary of Contents for Bosch Worcester 28CDi

  • Page 1 24CDi, 28CDi & 35CDi II APPLIANCE 24CDi Fanned Flued (RSF) 24CDi Balanced Flued (BF) 24CDi Open Flued (OF) 28CDi Fanned Flue (RSF) 35CDi II Fanned Flue (RSF) USER INSTRUCTIONS & CUSTOMER CARE GUIDE V o t e f o r y o f t h e y e a r ’...
  • Page 2: Excellence Comes As Standard

    What’s more, you also have the assurance of our no- nonsense 1 year parts and labour guarantee. And, to keep your boiler operating at peak condition and efficiency, an optional maintenance scheme is available from Worcester. Contact our Service Contracts team on 01905 754624 for further details.
  • Page 3: General Description

    A checklist can be found in the back of every installation manual. This is a vital document that needs to be completed by the installer at the time of installation. It confirms that the boiler has been installed and commissioned according to the manufacturers instructions.
  • Page 4 OFF mode. A flow restrictor is fitted within the appliance which limits a hot water delivery rate to a maximum of: 24CDi 28CDi 35CDi II 12.0 (±15%) litres/minute Hot Water and Central Heating mode: Gas to water...
  • Page 5: General Notes

    GENERAL NOTES CENTRAL HEATING SYSTEM During the first few hours of operation of the central heating system, check that all radiators are being heated at an even rate. Should the upper area of a radiator be at a lower temperature than the base of the radiator, it should be vented by releasing air through the venting screw at the top of each radiator.
  • Page 6: Room Thermostat

    CLEARANCES 24,28CDi RSF Left-hand side Right-hand side In Front Above Below Minimum clearances in millimetres. Your installer will have provided adequate space around the appliance for safety and servicing. Do not restrict this space by the addition of cupboards, shelves etc. close to the appliance.
  • Page 7: Circulating Pump

    BS 6798:1987: Section 6. It is essential that the airing space is separat- ed from the boiler space by a perforated non-combustible partition as described in BS 6798:1987. CIRCULATING PUMP This may be fitted with a speed adjuster.
  • Page 8: Operation Of Controls

    OPERATION OF CONTROLS OPERATING SWITCH In the ‘ ’ position there is no mains electricity to the appliance. In the ‘I’ position mains electricity is connected to the appliance. CENTRAL HEATING TEMPERATURE CONTROL The position of this knob will determine the temperature of the water delivered to the radiators between the ‘I’...
  • Page 9: Indicator Lights

    Fig. 2. Controls. Central heating demand indicator Mains electricity indicator Operating CH temperature switch control knob INDICATOR LIGHTS Mains electricity indicator: OFF : No mains electricity to the appliance ON : Mains electricity is connected to the Central heating demand indicator: OFF : No demand for heat to the central ON : Central heating demand FLASHING SLOW : Ignition lockout...
  • Page 10: To Light And Stop Appliance

    Fig. 3. CDi with front panel removed. Clip Circulating pump Locating peg TO LIGHT AND STOP THE APPLIANCE TO LIGHT THE APPLIANCE Check that the water valves to the central heating circuit are open. On sealed systems check that the grey needle on the pressure gauge is not below the required pressure.
  • Page 11: Ignition Lockout

    The appliance can be reset by pressing the reset button and holding in for 5 seconds. IGNITION LOCKOUT The appliance will enter a lockout condition in the event of the burner failing to ignite. If the burner fails to light within a preset time of 10 seconds the electricity supply to the gas valve will be interrupted.
  • Page 12: Appliance Fails To Operate

    APPLIANCE FAILS TO OPERATE A diagnostic system is provided which gives a flashing light dis- play on the facia panel. Press the reset button to attempt to restart the appliance. If the appliance does not return to normal operation then contact your installer or Worcester Bosch. More than 30% of all calls made to our contact centre reporting appliance faults or breakdowns prove to be false alarms, as there is often a simple explanation for the apparent malfunction.
  • Page 13: Maintaining Your Appliance

    In order to realise its maximum working life, and to ensure it continues to operate at peak efficiency and performance, it is essential that your boiler receives regular, competent servicing and annual maintenance checks beyond the initial 12 month guarantee period.
  • Page 14: Service Centres

    CONTACT NUMBERS: UK Contact Centre Tel. UK Contact Centre Fax. Scotland only Eire OPERATING HOURS: Mon - Fri Please contact our UK Contact Centre number where our friendly oper- ators will book your call with one of our team of nationwide engineers. Please refer to our website for our bank holiday opening hours.
  • Page 15 Worcester, Bosch Group is a trading name of BBT Thermotechnology UK Ltd. that the appliance was correctly commissioned. This information must then be documented in the Benchmark Gas Boiler Commissioning Checklist. 4. That any product or part thereof returned for servicing under the...
  • Page 16: Guarantee Registration

    Worcester CDi appliance and, while this will not affect your statutory rights in any way, it will assist us to maintain an effec- tive and efficient customer service by establishing a reference and permanent record for your boiler. IMPORTANT: SERIAL NUMBER. Copy the number off the Guarantee Card.

This manual is also suitable for:

Worcester 35cdi iiWorcester 24cdi