Bosch ZWB35-3A Series User Manual

Installation and Service Instructions for Contractors
Residential Gas Condensing Boiler
Greenstar
6 720 806 992-00-1O
ZBR16-3A... | ZBR21-3A... | ZBR28-3A... | ZBR35-3A... | ZBR42-3A... | ZWB28-3A... | ZWB35-3A... | ZWB42-3A...
6 720 806 992 (2015/03) CA/US
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.

Bosch ZWB35-3A Series Specifications

General

Brand	Bosch
Model	ZWB35-3A Series
Category	Boiler
Language	English

Summary

Key to Symbols and Safety Instructions

General Safety Instructions

Provides essential safety information for installation, operation, and maintenance.

Information About the Appliance

Technical Data

Provides detailed technical specifications for various boiler models.

Regulations

Installation

Installation and Operation Notes

Covers essential notes for proper installation and initial operation.

Selecting Installation Location

Guides on choosing the optimal location for appliance installation.

Mounting the Appliance

Details the steps for physically mounting the boiler unit.

Connecting Flue Gas Accessories

Instructions for connecting various flue gas system components.

Vent Pipe Lengths

Specifies maximum allowable lengths for vent and combustion air pipes.

Testing Gas and Water Connections

Procedures for testing gas and water connections for leaks.

Making Electrical Connections

General Notes and Low Voltage Connections

Covers electrical safety, Heatronic controls, and low voltage wiring.

Junction Box Connections

Details electrical connections within the 120 VAC junction box.

LWCO and Mains Power Connections

Instructions for connecting LWCO device and main power supply.

Commissioning

Before Operation and Switching

Space Heating and Control Programming

Quick Start and Settings

ZBR..-3A Appliances: Thermal Disinfection

Heatronic Boiler Control Settings

Description of Service Functions

Gas Type Conversion

Converting Gas Type and Setting Gas-Air Ratio

Flue Gas Test

Measuring CO Content of Flue Gas

Inspection and Maintenance

Description of Various Steps

Burner and Heat Exchanger Maintenance

Inspection Checklist

Faults

Troubleshooting and Faults Overview

Sensor Values and Code Plugs

Commissioning Log for the Appliance