Worcester WR 325 BF Installation And Servicing Instructions
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Worcester WR 325 BF Installation And Servicing Instructions

Worcester WR 325 BF Installation And Servicing Instructions

Gas fired multipoint
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See also: User Operating Instructions
WR 325 BF
Gas Fired Multipoint
Water Heater
INSTALLATION AND
SERVICING INSTRUCTIONS
For your safety – if you smell gas:
1. Turn off the appliance
2. Open all windows and doors
This appliance conforms to European Standard EN 26.
It is the law that all gas appliances are installed by competent persons.
The following instructions should be read carefully as the manufacturer cannot be held
responsible for any damage to property, persons or animals caused by incorrect installation
or operation of the appliance.
It is recommended that the appliance be serviced annually by a competent person or the
local Gas Region.
The Users Instructions should be handed to the user and the function and operation of the
appliance explained.
Bosch Thermotechnik
GC NUMBER 52 311 01
3. Do not operate any electrical switches
4. Extinguish all naked flames
5. Contact the local Gas Region immediately

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Summary of Contents for Worcester WR 325 BF

  • Page 1 Bosch Thermotechnik WR 325 BF Gas Fired Multipoint Water Heater INSTALLATION AND SERVICING INSTRUCTIONS GC NUMBER 52 311 01 For your safety – if you smell gas: 3. Do not operate any electrical switches 1. Turn off the appliance 4. Extinguish all naked flames 2.

  • Page 2: Table Of Contents

    Contents Gas Supply ..............Page 6 Installation Regulations..........Page 2 Installation ..............Page 6 General Information ............Page 2 Commissioning ..............Page 7 Technical Data ..............Page 5 10. Inspection and Servicing ..........Page 8 Siting the Appliance ............Page 5 11. Replacement of Parts ............Page 9 Siting the Flue Terminal ......
  • Page 3 Fig. 1. Appliance water flow diagram KEY TO COMPONENTS Heat exchanger Pilot gas valve stem Water strainer Pilot gas pipe Pilot gas button Hot water connecting pipe Gas injector nozzle Gas control slide Cold water connecting pipe Measuring point Piezo igniter Volumetric water governor Gas filter Water flow selector...
  • Page 4 Fig. 2. Appliance components KEY TO COMPONENTS 1. Heat exchanger 30. Flue hood 2. Pilot gas pipe 31. Combustion chamber seal 13. Gas control slide 32. Main gas burner 14. Piezo igniter 33. Pilot assembly *20. Gas inlet – downward facing 34.

  • Page 5: Technical Data

    3. Technical Data TABLE 1 – GENERAL TABLE 2 – FLUE DETAILS Natural Gas Wall hole size – width 224 mm (9 in.) Wall hole size – height 326 mm (13 in.) Minimum rated output 7 kW 7 kW Standard flue – minimum length 260 mm (10.4 in.) Maximum rated output 21.4 kW...

  • Page 6: Air Supply

    Fig. 3. Siting of the flue terminal. TERMINAL POSITION MIN. DISTANCE MINIMUM SITING DIMENSIONS FOR POSITIONING THE BALANCED A– directly below an openable window or ¢ ¡ ¤ £ ¤ £ ¤ ¥ ¦ ¥ ¨ §  © ¤ £    ¤   other opening e.g.

  • Page 7: Commissioning

    (b) Lay the appliance on its back and pull off the Temperature Fig. 4. Inlet pressure test point Control Knob. (c) Unscrew the plastic Temperature Control Knob housing. (d) Remove the four casing screw covers. Take out the four casing fixing screws and lift the casing clear. (e) Remove the collector hood from the appliance by slackening the two fixing screws and lifting the hood clear.

  • Page 8: Inspection And Servicing

    Fig. 7. Gas control slide – shut down position 10. Inspection and Servicing Piezo igniter To ensure continued efficient operation of the appliance, it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of servicing will depend upon the particular installation conditions and usage but in general once a year should be adequate.

  • Page 9: Replacement Of Parts

    The ball within the valve should move freely. Check by shaking. 3. The seals around the igniter cable/thermocouple and pilot gas pipe are correctly seated in the combustion chamber Check the O-ring and replace if necessary. base and the pilot injector has been fitted. Re-assemble in reverse order.

  • Page 10: Fault Finding

    12. Fault Finding Problem Cause Solution Incorrect water temperature Incorrect gas rate Check the gas supply to appliance gas service cock Open the gas service cock Check the burner pressure Check the inlet pressure Water section sticking or faulty Clean or replace Incorrect water flow rate Incoming supply valve closed Open supply valve...
  • Page 11 Additional Information 1. CE Certification 0064 MODEL WR325-1AD... WR325-1AV... CE NUMBER CE 0085 AQ 0293 CATEGORIES TYPE 2. Symbols on Data Plate Nominal useful output Minimum useful output Nominal heat input Minimum heat input Maximum service water pressure Minimum service water pressure wmin Type: C - Natural draught appliances...
  • Page 12 Bosch Thermotechnik Worcester Heat Systems Limited, Cotswold Way, Warndon, Worcester WR4 9SW. Telephone: (01905) 754624. Fax: (01905) 754619. This booklet is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are changed in the interests of continued improvement.

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