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Bosch WR8/11 G Series Installation And Operating Istructions

Gas instantaneous water heater
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Gas Instantaneous Water Heater
WR8/11 G...
Installation and Operating Instructions
Read installation manual prior to installation of this unit!
Read user manual before putting this unit in operation!
Observe the warnings in the manuals!
The installation room must fulfill the ventilation requirements!
Installation by an authorised person only!
6720607845

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  Summary of Contents for Bosch WR8/11 G Series

  • Page 1 Gas Instantaneous Water Heater WR8/11 G... Installation and Operating Instructions Read installation manual prior to installation of this unit! Read user manual before putting this unit in operation! Observe the warnings in the manuals! The installation room must fulfill the ventilation requirements! Installation by an authorised person only! 6720607845...
  • Page 2: Table Of Contents

    2 | Table of contents Table of contents Periodic maintenance work ... . 14 Key to symbols and safety instructions ..3 Startup after maintenance work .
  • Page 3: Key To Symbols And Safety Instructions

    Key to symbols and safety instructions | 3 If there is a smell of burnt gases: Key to symbols and safety instructions ▶ Disconnect the appliance. ▶ Open doors and windows. Key to symbols ▶ Inform an installation company. Warnings Fitting, modifications ▶...
  • Page 4: Technical Characteristics And Dimensions

    4 | Technical Characteristics and Dimensions appliance and understand the resulting Accessories (Included with Appliance) • Gas water heater, dangers. Children must not play with the • Attachment elements, appliance. Cleaning and user maintenance • Installation accessories, must not be performed by children without •...
  • Page 5: Dimensions

    Technical Characteristics and Dimensions | 5 Dimensions Fig. 1 [1] Front cover [9] Flue socket [2] Hole for fixing to wall [10] Draught diverter with flue gas monitor [3] Observation window [11] Heat exchanger [4] Temperature control [12] Automatic gas valve [5] LED indicator Fault/ "Burner Out"...
  • Page 6: Electrical Diagram

    6 | Technical Characteristics and Dimensions Electrical diagram Fig. 2 Electrical diagram [1] Servo valve (normally open) pilot burner flame is then extinguished after a short period of [2] Diaphragm valve time. [3] Gas valve for pilote burner (normally closed) This is a way of saving a great amount of energy as the pilot [4] Ionisation detector burner only operates for the minimum necessary time to ignite...
  • Page 7: Technical Characteristics

    Technical Characteristics and Dimensions | 7 Technical characteristics Technical characteristics Symbol Units WR11 Power and flow Nominal useful power 11,8 19,2 Minimum useful power Pmin Useful power (adjustment range) 7 - 11,8 7 - 19,2 Nominal thermal flow 13,5 21,8 Minimum thermal flow Qmin Gas data...
  • Page 8: Product Data On Energy Consumption

    8 | Technical Characteristics and Dimensions Product data on energy consumption The following product data complies with the requirements of EU Regulations 811/2013, 812/2013, 813/2013 and 814/2013 as supplement to the Directive 2010/30/EU. Product data Symbol Unit 7701431589 Product type –...
  • Page 9: Use

    Use | 9 Open all water and gas blocking devices. Purge the pipes. CAUTION: The front panel in the burner and pilot burner area may reach high temperatures, with risk of burning in case of contact 6720680412-03.1av Before starting up the heater Fig.
  • Page 10: Power Adjustment

    10 | Regulations Power adjustment ▶ Turn clockwise. Decreases flow and increases water temperature. Lower water temperature. Less power. Regulating the temperature to the minimum required value reduces energy consumption as well as the possibility of limescale deposits in the heat exchanger. Purge the appliance If there is a risk of freezing, proceed as follows: ▶...
  • Page 11: Installation

    Installation | 11 • To avoid corrosion, the combustion air must be free from Installation harmful substances. Examples of particularly corrosive substances: halogenated hydrocarbons contained in solvents, paints, glues, engine gases and various domestic DANGER: Explosion detergents. If necessary, take adequate measures. ▶...
  • Page 12: Heater Mounting

    12 | Installation ▶ Connect the water pipes to the water valve using the CAUTION: provided connection accessories. Ensure that the extremity of the evacuation pipe is placed between the ledge and the ring of the flue. If these conditions cannot be met, a different location must be selected for the gas intake and evacuation.
  • Page 13: Inlet/Exhaust Pipe Installation

    (inspection) or if proceed as explained in “ 7.3 Combustion gas probe”. necessary (maintenance). These jobs can only be done by a Bosch Technical Assistance delegate. Adjustments (must be carried out only by qualified technicians)
  • Page 14: Periodic Maintenance Work

    14 | Maintenance (must be carried out only by qualified technicians) Periodic maintenance work If the appliance shuts down while in operation: ▶ ventilate the room. Functional check ▶ Wait about 10 minutes then restart the appliance. ▶ Check the operation of all safety, adjustment and If the problem recurs, call an engineer.
  • Page 15: Problems

    Problems | 15 Problems Assembly, maintenance and repairs must be performed by qualified technicians only. The following chart offers solutions to possible problems (solutions followed by an * must be undertaken by qualified technicians only). Problem Cause Solution The heater does not ignite. Switch turned off.
  • Page 16: Environment / Disposal

    16 | Environment / disposal Environment / disposal Environmental protection is a fundamental corporate strategy of the Bosch Group. The quality of our products, their efficiency and environmental safety are all of equal importance to us and all environmental protection legislation and regulations are strictly observed.
  • Page 17 | 17 Notes 6 720 607 845 (2015/05)
  • Page 18 Bosch Thermotechnik GmbH Sophienstrasse 30-32 D-35576 Wetzlar www.bosch-thermotechnology.com...