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Bosch WR11 series Installation And Operating Instructions Manual

Gas instantaneous water heater
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Installation and Operating Instructions
Gas Instantaneous Water Heater
Safety instructions:
If you smell gas:
- Do not operate any electrical switches.
- Do not telephone from inside the danger area.
- Turn off the gas cock.
- Open windows and ventilate room.
- From outside, call the gas company and your approved
installer.
Do not use or store easily combustible materials in the vicinity
of the appliance.
WR11..G...
WR14..G...
WR18..G...
With electronic ignition and triple safety system
consisting of ionisation detector, flue gas monitor
and heat exchanger temperature sensor.
Installation and servicing of the appliance may only be
carried out by an approved technician.
The appliance should be regularly serviced in order to ensure
that it remains in perfect and safe working order.
If there is a risk of freezing, the appliance must be switched
off and drained. If the appliance has not been drained during
a cold spell, when it is switched on again check that it
produces hot water. If problems occur, contact your installer.

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  Summary of Contents for Bosch WR11 series

  • Page 1 Installation and Operating Instructions Gas Instantaneous Water Heater WR11..G... WR14..G... WR18..G... With electronic ignition and triple safety system consisting of ionisation detector, flue gas monitor and heat exchanger temperature sensor. Safety instructions: If you smell gas: Installation and servicing of the appliance may only be - Do not operate any electrical switches.
  • Page 2: Table Of Contents

    Contents Technical Characteristics and Dimensions 2.5 HDG funcioning ..............5 2.6 Gas connection ..............5 1. 1 General Description ............2 2.7 Flue ..................5 1.2 Explanation of Model Code ..........2 2.8 Commissioning ..............5 1.3 Accessories ................ 2 1.4 Dimensions .................
  • Page 3: Dimensions

    Dimensions 1. Outer case 2. Hole for fixing to wall 3. Observation window 4. Temperature control 5. LED failure indicator 6. On/Off switch 7. LED indicator for burner status 8. Output control 9. Gas connection 10. Flue socket 11. Draught diverter with flue gas monitor 12.
  • Page 4: Circuit Diagram

    Circuit diagram Servo valve (normally open) Diaphragm valve Main valve (normally closed) Ionisation detector Igniter electrode Flue gas safety device Temperature limiter Igniter unit LED failure indicator LED indicator for burner status On/Off switch Hydrogenerator Fig. 4 Technical characteristics Technical Data Symbol Unit WR11...
  • Page 5: Preconditions For Installation

    Preconditions for installation and the heat exchanger.The HDG has a turbine,which turns with the water flow.This movement is transmitted to an electric generator,which supplies the electronic box. The appliance can only be sold in the countries mentioned The electric voltage supplied by the HDG is a value between in the type plate.
  • Page 6: Operation And Maintenance

    HDG and other parts. Check the gas and water valves for leaks and carry out a complete function check. If components need to be replaced, use only genuine Bosch spare parts. 6 720 607 529...
  • Page 7: Troubleshooting

    Troubleshooting Installation, servicing and repairs may only be carried out by an approved engineer. The following table illustrates only a few solutions to straightforward problems. Fault Possible Cause Solution Appliance does not ignite. Switch set to Off Check position and refit/replace. Pilot flame lights slowly/with difficulty Low water flow.
  • Page 8: Operation

    Operation Turn on all gas and water taps Purge air from pipes Switching on/off Press “ “ switch to switch - On (I) appliance on/off - Off (0) Starting up Temperature adjustment Low water temperature Turning control anti-clockwise Lower output increases water flow rate and reduces water temperature High water temperature...

This manual is also suitable for:

Wr18 seriesWr14 series