Worcester bosch 28si service manual

Page 36 Is the gas supply Rectify gas supply connected and at the problem. Remove front panel. Remove inner cover.

Repair or replace Reset and restart the Reset and restart the Are the electrodes and spark electrode boiler. Can a flame be boiler. Page 37 Is the multiway connector at board position ST16 pushed Push fully home fully home on to the board? Check the DHW sensor. Is it correctly Re-fix sensor onto pipe fitted onto the pipe with heat conductive paste between the pipe and sensor? Remove multiway connector from board position ST Page 38 Turn off boiler.

Is there Does the fan run Remove the fan continuity across the before the fault connector from board C and NO terminals of occurs? Is where green wires are Replace control board. Page 39 The gas valve mode Turn to 'NORM' switch concealed by position the facia side panel is not set correctly Light indication during fault not Control board is likely covered by above to be wet or damaged details.

Check for wet board or connections. Telephone: Fax: Technical Helpline Page 41 Replace white case. Page 43 1. Flue Terminal Position Fig. When installed the minimum clearance between the terminal and any adjoining vertical walls or obstructions must be at least mm. Page 44 The maximum equivalent flue heights, excluding the flue terminal assembly are: Table 2.

Page 45 Fig. Adaptor 3. Preparation and General Notes Ensure the ducts are correctly located into 3. Page 46 3. However, joints must be sealed and fixed as described. Align the centre of the flue spigot with the ceiling and mark the centre position. Page 47 4. Measurement of Ducts 4. This is dimension 'E ' Refer to Fig. Page 48 4. Page 49 4. Page 50 Fig. Drill two holes at the appliance.

Page 52 Important: Do not forget to fix the fire stop spacer as the assembly of the system proceeds. From outside, pass the terminal assembly through the roof flashing. Page 55 Gas Safety Installation and Use Regulations : All gas appliances must be installed by a competent person, in accordance with the above regulations.

Failure to install the appliance correctly could lead to prosecution. The manufacturers notes must not be taken, in any way, as overriding statutory obligations. Page 56 Programmer connection Fig. The domestic hot water is permanently available upon demand and will take priority over the supply of heat to the system during the demand.

Pressing the SET button repeatedly progresses you through the settings. Pressing and holding down the YES button starts the clock fast running until it reaches the first switching time when the output changes and the display halts to show the time of switching and the output state.

Page 60 Temperature Control: The Central Heating water temperature is controlled by the centre knob on the facia. The Domestic Hot Water Temperature is controlled by the right hand knob on the facia. This manual is also suitable for: 25si. Print page 1 Print document 62 pages. Rename the bookmark. Delete bookmark? Cancel Delete. Delete from my manuals? Download 1. Order hard copy Please use the form to order printed copies of the document you selected.

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