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Bosch Greenstar Series User Manual

Bosch Greenstar Series
80 pages
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6721822579 (2021/01) US/CA
Installation and Service Instructions for Contractors
Residential Gas Condensing Boiler
Greenstar
0010004900-002
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.
These instructions are available in English and French.
Please keep these instructions for future reference.
ZBR 21-3 A... | ZBR 28-3 A... | ZBR 35-3 A... | ZBR 42-3 A... | ZWB 28-3 A... | ZWB 35-3 A... |
ZWB 42-3 A...

Table of Contents

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Bosch Greenstar Series Specifications

General IconGeneral
BrandBosch
SeriesGreenstar
Fuel TypeNatural Gas
Vent TypeSealed combustion chamber
Heat Exchanger MaterialAluminum-silicon alloy
WeightVaries by model
CategoryBoiler
Output Range15-30 kW
NOx EmissionsLow NOx

Summary

Explanation of Symbols and Safety Instructions

General Safety Instructions

Provides essential safety guidelines for handling gas leaks, flue gas, and general appliance operation.

Product Description

Electrical Wiring ZBR...-3A

Electrical Wiring ZWB...-3A

Regulations

Compliance with Standards and Regulations

Ensures installation adheres to applicable national, local codes, and standards.

Additional Regulations for Installations in the Commonwealth of Massachusetts

Specifies unique requirements for Massachusetts installations, including CO detectors and signage.

Examples of Installations

Multiple Zones Using Zone Valves with DHW

Illustrates piping for a system with multiple heating zones controlled by zone valves.

Multiple Zones Using Circulators

Notes on Installation and Operation

Important Notes

Key considerations for filling and making-up water for the heating system.

Mounting the Appliance

Installing the Low Water Cut Off (LWCO)

Connecting Flue Gas Accessories

Installation of the Exhaust and Air Intake System

Examples of Approved Horizontal and Vertical Venting Installation

Vent and Combustion Air Pipe Lengths

Testing Gas and Water Connections for Leaks

Electrical Connection

Low Voltage Electrical Connections in the Heatronic Boiler Control

Details electrical connections for low voltage components within the Heatronic control.

Electrical Connections in the Junction Box (120 VAC)

Connecting the LWCO Device

Commissioning

Before Operating the Appliance

Crucial steps before initial operation to prevent damage and ensure proper function.

Switching the Appliance ON/OFF

Procedure for turning the appliance on and off, including display indications.

Switch on Heat

Guidance on setting the maximum supply temperature based on heat loss.

Programming the Bosch Room Controller

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

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

Setting Frost Protection

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

Heatronic Boiler Control Settings

Gas Adjustment

Checking and Setting the Gas-Air Ratio (CO2 or O2), if Required

Procedure for checking and adjusting the gas-air mixture for optimal combustion.

Dynamic Gas Pressure Test Port

Flue Gas Test

Measuring CO Content of Flue Gas

Procedure for measuring carbon monoxide levels in flue gas.

Inspection and Maintenance

Burner Servicing

Maintenance and Inspection Checklist

Readings on the Display

Faults

Troubleshooting

General advice for troubleshooting appliance faults and potential hazards.

Faults That Are Shown on the Display

Faults That Are Not Shown on the Display

Check Sensor Values

Commissioning Log for the Appliance

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