Bosch KBR28-3 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 KBR28-3 Specifications

General

Brand	Bosch
Model	KBR28-3
Category	Boiler
Language	English

Summary

Key to Symbols and Safety Instructions

General Safety Instructions

Essential safety guidelines for installation and operation.

Information About the Appliance

Proper Use

Defines the intended and prohibited uses of the appliance.

Regulations

Compliance with Standards and Regulations

Outlines the standards and guidelines applicable to installation.

Installation

Installation and Operation

Covers essential steps for installing and operating the heating system.

Installing a Low Water Cut Off (LWCO)

Details the process of installing a safety device for low water levels.

Connecting Flue Gas Accessories

Explains how to connect venting systems and accessories.

Making the Electrical Connections

General Notes

Covers general safety and electrical requirements for connections.

Electrical Connections in the Junction Boxes

Connecting the LWCO Device

Commissioning

Before Operating the Appliance

Outlines crucial checks before starting the appliance for the first time.

Startup

KBR..-3A Appliances (Heating Boiler) with DHW Tank: Thermal Disinfection

Thermal Disinfection

Heatronic Boiler Control Settings

First Service Level

Gas Type Conversion

Converting to a Different Gas Type

Guides on converting the appliance for different gas types.

Flue Gas Test

Emissions Test Button

Measuring CO Content of Flue Gas

Inspection and Maintenance

Description of Various Steps

Burner Servicing

Heat Exchanger Block Inspection and Cleaning

Checklist for Annual Inspection and Maintenance

Provides a checklist for performing annual service.

Faults

Troubleshooting

Offers general guidance for diagnosing and resolving appliance faults.

Faults That Are Shown on the Display

Lists faults displayed on the unit and their elimination steps.

Check Sensor Values