Bosch
W 135 K.B. User Manual

For your safety
If you smell gas:
- Turn off gas isolating valve;
- Open windows to increase air circulation;
- Do not operate any electrical switches;
- Do not use the telephone on the premises;
- Call an authorised technician or the local gas authority
immediately.
Installation and servicing should only be performed
by authorised personnel.
Regular maintenance is recommended to ensure correct
and safe performance.
Do not store or use inflammable liquids or materials near
the appliance.
If the appliance is installed in a position likely to be affected
by frost, isolate gas and water supplies, remove batteries
and drain. If problems occur call an authorised technician
immediately.
The installer should explain to the customer how the
appliance functions and how to operate it. A copy of these
instructions must be made available to him.
W 135 K.B..
W 275 - 1 K.B..
W 350 - 1 K.B..
W 400 - 1 K.B..
Gas Fired Instantaneous
Water Heaters
Installation, Servicing and User Instructions
With electronic ignition and
ionisation probe safety
system
6 720 605 351 PT 1999.11

Bosch
W 135 K.B. Specifications

General

Brand	Bosch
Model	W 135 K.B.
Category	Water Heater
Language	English

Summary

Main Features and Technical Data

Dimensions

Detailed physical dimensions and diagram of the water heater models.

Technical Data

Key technical specifications including output, input, gas, and water data.

Installation Requirements

Location

Guidance on selecting an appropriate, well-ventilated, frost-free location.

Water Connection

Instructions for connecting water pipes, including flushing and filter use.

Gas Connection

Requirements for connecting the gas supply and verifying pressure compatibility.

Flue Pipe Connection

Details on connecting the flue pipe for proper exhaust gas removal.

Air Supply

Requirements for room air vents and clearances for ventilation.

Installation

Steps for final installation checks, including gas/water valves and battery insertion.

Operating and Servicing

Operating the Water Heater

Instructions on how to operate the water heater using the output slide control.

Flue Gas Safety Device

Explanation of the flue gas safety device and troubleshooting steps.

Servicing

Recommendations and procedures for annual servicing by a qualified technician.

Fault Finding

Common problems, their causes, and solutions for troubleshooting the appliance.