Bosch KBR42-3 User Manual

Installation and Service Instructions for Contractors
Residential Gas Condensing Boiler
Greenstar FS/Combi FS
6720810590-00.2Wo
WARNING:
Improper installation, set-up, modification, operation or
maintenance of the heating system can cause personal injury and
property damage.
Follow these instructions precisely.
If you require assistance or further information, contact a trained
and certified installer or the gas supply company.
WARNING:
The operating instructions are part of the technical documents that
must be handed over to the owner or operator of the heating
system.
Explain to the owner or operator how to use the heating system
using the operating instructions. Make sure that they are familiar
with all required information for the safe and proper operation of
the heating system.
NOTICE:
In Massachusetts, this appliance must be installed by a licensed
plumber or gas fitter.
These instructions are available in English and French.
Please keep these instructions for future reference.
Warranty information available at www.bosch-climate.us
Annual service is required
KBR16-3. |KBR21-3. |KBR28-3. |KBR35-3. |KBR42-3. |KWB28-3. |KWB35-3. |KWB42-3.
6720810590 (2015/05) CA/US

Bosch KBR42-3 Specifications

General

Brand	Bosch
Model	KBR42-3
Category	Boiler
Language	English

Summary

Key to Symbols and Safety Instructions

General Safety Instructions

General safety guidelines and warnings.

Information About the Appliance

Electrical Wiring Heating Boiler KBR..-3A

Electrical wiring diagram for heating boiler.

Technical Data Heating Boiler KBR 16-3

Installation

Installation and Operation

General installation and operation guidelines.

Selecting the Installation Location

Installing a Low Water Cut Off (LWCO)

Connecting Flue Gas Accessories

Installation of the Exhaust and Air Intake System

Installing exhaust and air intake systems.

Making the Electrical Connections

General Notes

Important safety and general electrical notes.

Electrical Connections in the Junction Boxes

Connecting Mains Power Supply

Connecting the LWCO Device

Commissioning

Before Operating the Appliance

Pre-operation checks and system filling.

Startup

Initial appliance start-up procedure.

Programming the FW 200 Heating Control Unit (Optional Accessory)

Setting Frost Protection

Heatronic Boiler Control Settings

Description of the Service Functions

Gas Type Conversion

Converting to a Different Gas Type

Procedure for converting gas types.

Setting the Gas-Air Ratio (CO2 or O2)

Adjusting gas-air ratio.

Flue Gas Test

Measuring CO Content of Flue Gas

Inspection and Maintenance

Description of Various Steps

Steps for inspection and maintenance.

Burner Servicing

Heat Exchanger Block Inspection and Cleaning

Checklist for Annual Inspection and Maintenance

Checklist for annual service.

Faults

Troubleshooting

General troubleshooting advice.

Faults That Are Shown on the Display

List of displayed fault codes and solutions.

Check Sensor Values

Commissioning Log for the Appliance