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Bosch W11B 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.
W11..B...
W14..B...
W18..B...
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 W11B

  • Page 1 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.
  • Page 2: Table Of Contents

    3.7 Troubleshooting ... 7 Operation ... 8 Explanation of Model Code S… S… S… W Gas instantaneous water heater 11 Flow rate (l/min) B Electronic ignition powered by 1.5 V batteries 23 Natural gas type H 31 LPG (butane/propane) S... Country code Accessories (Included with Appliance) - Sleeves and hooks for wall-mounting.
  • Page 3: Dimensions

    Dimensions Dimensions (mm) W11..B... 112,5 W14..B... 132,5 132,5 W18..B... Appliance design 6 720 607 527 H (Ø) Natural Gas 1/2" 1. Outer case 2. Hole for fixing to wall 3. Observation window 4. Temperature control 5. LED indicator for battery charge level 6.
  • Page 4: Circuit Diagram

    Circuit diagram Technical characteristics Technical Data Rated max. heat output Rated min. heat output Output (modulation range) Rated max. heat input Rated min. heat input Supply pressure: Natural gas LPG (butane/propane) Consumption: Natural gas LPG (butane/propane) Number of injectors Max. water pressure** Temperature control at maximum setting Temperature increase Flow rate...
  • Page 5: Preconditions For Installation

    Preconditions for installation The appliance can only be sold in the countries mentioned in the type plate. 2. 1 Regulations Any local by-laws and regulations pertaining to installation and use of gas-heated appliances must be observed. Please refer to the laws that should be attended in South Africa. Location The appliance should be sited in a well ventilated room where it will not be exposed to temperatures below freezing.
  • Page 6: Functions And Maintenance

    Sealed parts must not be interfered with. 3. 1 Function This water heater is fitted with automatic electronic ignition that provides for easy commissioning. All that is required is to press the On/Off switch (Fig. 6). The appliance will then ignite automatically as soon as a hot water tap is turned on.
  • 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 Appliance does not ignite. Pilot flame lights slowly/with difficulty Red LED flashes Water not hot enough Water not hot enough, no flame Flame goes out while appliance is in operation...
  • Page 8: Operation

    Operation Turn on all gas and water taps Purge air from pipes Insert two 1.5 V type R 20 batteries in battery compartment Safety precautions for use of batteries: - Do not dispose of batteries with normal household waste, take them to a recycling site instead.

This manual is also suitable for:

W14bW18b