Bosch KBR35-3 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 KBR35-3 Specifications

General

Category	Boiler
Power Consumption	35 kW
Weight	30 kg
Protection Class	IPX4D
Power Supply	220-240V
Heating Capacity	35 kW

Summary

Key to Symbols and Safety Instructions

General Safety Instructions

Provides essential safety guidelines for operating the boiler.

Scope of Delivery

Information About the Appliance

Proper Use

Defines the intended and unintended uses of the appliance.

Heatronic Boiler Control Settings

Gas Type Conversion

Technical Data Heating Boiler KBR 16-3

Technical Data Combi Boiler KWB 28-3

Regulations

Compliance with Standards and Regulations

Outlines compliance with national and local codes.

Operating Limits of the Boiler

Specifies the maximum operating parameters for the boiler.

Additional Regulations for Installation in Massachusetts

Lists specific installation rules for Massachusetts.

Common Applications of KBR Boilers

Installation

Installation and Operation

General guidance for installing and operating the system.

Notes on Installation and Operation

Details on fill and make-up water and commissioning steps.

Comparing the Size of the Integrated Expansion Vessel (KWB-3A Boiler Only)

KBR..-3A Appliances (Heating Boilers): Selecting an Expansion Vessel

Selecting the Installation Location

Low Loss Header (LLH) Utilization

To Utilize the LLH

Step-by-step instructions to utilize the Low Loss Header (LLH).

Locating the Appliance

Positioning the Appliance

Guidance on correctly positioning the boiler for proper operation.

Installing a Low Water Cut Off (LWCO)

Connecting Flue Gas Accessories

Installation of the Exhaust and Air Intake System

Vent and Combustion Air Pipe Lengths

Testing Gas and Water Connections for Leaks

Making the Electrical Connections

General Notes

General precautions and requirements for electrical work.

Electrical Connections in the Junction Boxes

Details electrical connections within junction boxes.

Connecting Mains Power Supply

Instructions for connecting the main power supply to the boiler.

Connecting the LWCO Device

Provides instructions for connecting the LWCO device.

Commissioning

Before Operating the Appliance

Steps to take before initial appliance startup.

Startup

Instructions for switching the appliance ON and OFF.

Setting Up Space Heating

Guide to setting the maximum supply temperature for space heating.

Programming the FW 200 Heating Control Unit (Optional Accessory)

Guide to programming the optional FW 200 control unit.

Resetting All Settings (for Installers Only)

Procedure for resetting all system settings to factory defaults.

After Commissioning

Checks and procedures to perform after the initial commissioning.

KBR..-3A Appliances (Heating Boilers) with DHW Tank: Setting the DHW Temperature

Setting the DHW temperature for KBR heating boilers.

KWB..-3A Appliances (Combi Boilers): Setting the DHW Temperature

Setting the DHW temperature for KWB combi boilers.

Setting Frost Protection

Instructions for setting frost protection for heating system and DHW.

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

Procedure for thermal disinfection of the DHW system.

Heatronic Boiler Control Settings

Service Function 2.b: Maximum Supply Temperature

Sets the maximum allowed supply temperature.

Service Function 2.d: Thermal Disinfection (Legionella Protection)

Details thermal disinfection for Legionella protection.

Service Function 2.F: Operating Mode

Allows temporary change of the appliance's operating mode.

Service Function 7.E: Building Drying Function

Service Function 0.d: Altitude Adjustment

Service Function 8.E: Restore Boiler to Factory Settings

Resets all appliance parameters to factory settings.

Service Function 9.d: Set Fan Start Speed

Gas Type Conversion

Converting to a Different Gas Type

Details the process for converting the appliance to different gas types.

Installation Location Higher Than 2,000 Feet (610 m) Above Sea Level

Setting the Gas-Air Ratio (CO2 or O2)

Dynamic Gas Pressure Test

Flue Gas Test

Measuring CO Content of Flue Gas

Inspection and Maintenance

Description of Various Steps

Details various steps for inspection and maintenance.

Plate Type Heat Exchanger (Only Combi Boiler KWB..-3A)

Burner Servicing

Instructions for servicing the boiler's burner.

Heat Exchanger Block Inspection and Cleaning

Expansion Vessel

Setting the Boiler Water Pressure

Testing System Water Quality

Checklist for Annual Inspection and Maintenance

A checklist to guide annual service and maintenance procedures.

Faults

Troubleshooting

General troubleshooting steps for appliance faults.

Faults That Are Shown on the Display

Lists faults indicated on the boiler display and their remedies.

Faults That Are Not Shown on the Display