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General| Model | Worcester 28CDi |
|---|---|
| Category | Boiler |
| Output | 28 kW |
| Max CH Output | 24 kW |
| ErP Space Heating Efficiency Class | A |
| ErP Water Heating Efficiency Class | A |
| Max Working Pressure | 3 bar |
| Flow Rate | 11.4 l/min |
| Fuel Type | Natural Gas |
| Mounting | Wall-mounted |
| Type | Combination boiler |
Details gas safety regulations for appliance installation and use, emphasizing competent persons and CORGI registration.
Explains the Benchmark initiative for correct installation, commissioning, and servicing of boilers.
Describes the Worcester CDi models as combi appliances for domestic hot water and central heating.
Details how the appliance operates to supply domestic hot water only when heating is not required.
Explains operation when both hot water and central heating are demanded, with heating controlled by thermostat.
Guidance on checking radiators during initial central heating system operation and venting procedures.
Information on maintaining pressure in sealed heating systems and how to repressurise using the filling key.
Brief mention of open vented heating systems, stating no pressure gauge observation is needed.
Specifies minimum clearances required around the appliance for safety and servicing.
Explains the function and location of a room thermostat for central heating temperature control.
Details requirements for thermostatic radiator valves, including specific room thermostat placement.
Guidance on using taps, showers, and mixing valves with the appliance, including mains pressure suitability.
Explains the impact of water supply failure on appliance operation and heating.
Recommends In-Line scale inhibitors for areas with exceptionally hard water supply.
Details the requirement for adequate fresh air supply for open flued appliances and ventilation precautions.
Explains ventilation requirements for balanced and room sealed appliances, emphasizing unobstructed openings.
Provides advice on draining the appliance for long periods of non-use to prevent freezing.
Emphasizes the importance of annual servicing for efficiency and longevity, and how to arrange it.
Instructs immediate actions for suspected gas leaks: turn off supply, ventilate, do not use electrical switches.
Advises on cleaning the outer casing using a damp cloth and detergent, avoiding abrasive cleaners.
Explains the function of the operating switch ('O' for off, 'I' for on) to connect/disconnect mains electricity.
Describes how to set the radiator water temperature and switch to hot water only mode.
Explains how to set the domestic hot water tap temperature and how flow affects it.
Mentions the possibility of a fitted programmer and refers to its specific instructions.
Instructions on pressing the reset button for five seconds if indicator lights flash slowly.
Explains the function of the red (set) and grey (actual) needles on the pressure gauge for sealed systems.
Describes the 'OFF' and 'ON' states of the mains electricity indicator light.
Explains the states of the central heating indicator: off, on, flashing slow (lockout), flashing fast (fault).
Explains the states of the DHW indicator: off, on, flashing fast (airflow/spillage fault).
Describes the condition where both CH and DHW indicators flash together, indicating overheat cut-off.
Details the flame detection indicator: 'OFF' for burner off, 'ON' for burner on.
Step-by-step instructions on how to light the appliance, including checking valves and setting controls.
Instructions for stopping the appliance for short periods (turning down CH temp) and long periods (switch off).
Explains what happens to the appliance during an electricity supply failure and after restoration.
Describes the function of the overheat cut-off thermostat and the indicator lights when activated.
Explains the ignition lockout condition, its causes, and how to reset the appliance.
Details lockout conditions related to air flow faults in RSF appliances and how to check the flue terminal.
Explains flue spillage faults in OF appliances, the device's function, and automatic reset.
Provides instructions on how to safely remove and replace the front panel of the appliance.
Explains the diagnostic system, how to attempt a restart, and when to contact support.
Details the conditions under which call-outs are free or chargeable, including installation date and fault origin.
Highlights the necessity of regular, competent servicing for peak efficiency and product longevity.
Advises on arranging service contracts with installers or contacting Worcester for assistance.
Lists contact numbers and fax for UK and Eire service centres.
Provides the operating hours for the UK Contact Centre from Monday to Sunday.
Directs users to the website for bank holiday opening hours and further information.
Outlines the 24-month guarantee period, requiring registration and initial service within 12 months.
Details that faulty components will be repaired or exchanged free of charge by BBT Thermotechnology UK Ltd.
Lists exclusions such as faulty installation, neglect, misuse, or non-observance of instructions.
Specifies that the guarantee applies only to equipment purchased and used in mainland Great Britain.
Explains the importance of returning the Guarantee Registration Card within 30 days for customer service.
Instructs users to record model, serial number, and installation date for their own reference.
Advises on checking installer's CORGI registration by phone and recording details in the log book.
