Bosch WR 18 B User Manual

Installation Manual and Operating Instructions
Gas Instantaneous Water Heater
WR 11/14/18 .B..
6720648592 (2014/05) ZA
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!

Bosch WR 18 B Specifications

General

Gas Type	Natural Gas
Temperature Range	60°C
Connection Type	1/2 inch
Exhaust Type	Flue
Frequency	50 Hz
Protection	Overheating protection

Summary

Installation Manual & Operating Instructions

Key Symbols and Safety Instructions

General Safety Guidelines

Covers safety for gas leaks, burn-back, modifications, and general operational practices.

User and Installer Obligations

Technical Characteristics and Dimensions

Heater Description and Dimensions

Electrical Diagram and Function

Detailed Technical Specifications

Lists detailed technical specifications including power, flow, pressure, and consumption data.

Installation by Qualified Technicians

Pre-Installation Checks and Site Selection

Covers regulations, important information, gas valve, pipe testing, and installation location requirements.

Heater Mounting and Water Connection

Gas and Flue Pipe Installation

Covers gas connection safety, flue pipe installation, and final startup procedures.

Adjustments and Gas Conversion

Pressure and Gas Flow Adjustment

Details procedures for adjusting burner pressure and maximum gas flow using specific tools.

Gas Type Conversion

Maintenance and Servicing

Periodic Maintenance Tasks

Covers functional checks, heat exchanger, burner, water filter, and pilot injector cleaning.

Flue Gas Safety Device

Troubleshooting Common Problems