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Worcester ZB 7-28 HE system

Worcester ZB 7-28 HE system
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Users Instructions and
Customer Care Guide
Greenstar HE combi Condensing boiler
Greenstar HE system Condensing boiler
6 720 610 577-00.10
ZWB 7-25 HE combi
GC-Number: 47 311 73
ZWB 7-30 HE combi
GC-Number:
47 311 74
ZB 7-28 HE system
GC-Number: 41 311 58
6 720 610 577 GB (03.02) OSW
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Worcester ZB 7-28 HE system Specifications

General IconGeneral
MountingWall-mounted
Boiler TypeCondensing
TypeSystem
Fuel TypeNatural Gas
Output7.2 to 28 kW

Summary

Excellence comes as standard

Benchmark Initiative

New code of practice for correct installation, commissioning, and servicing of boilers.

Safety Precautions

Gas Leak Procedures

Steps to take if you suspect a gas leak from the appliance.

Fume Detection Procedures

Actions to take if fumes are detected from the appliance.

Installation and Modification Safety

Guidelines for safe installation and modifications by qualified personnel.

Maintenance and Servicing Advice

Recommendations for regular servicing and using genuine spare parts.

General Notes

Appliance Safety and Environment

Covers combustible materials, health aspects, and air requirements for safe operation.

Heating System Operation Guidance

Details on sealed and central heating systems, pressure, and radiator checks.

Controls

Key Indicators and Switches

Overview of pressure gauge, master switch, and indicator lamps.

Temperature and Flow Controls

Adjustments for central heating, hot water, and specific modes like ECO.

Valves and Connections

Details on service valves, gas isolation, and water inlets.

Operating the Appliance

3.1 Preparation

Steps for preparing the appliance, including turning on gas and system valves.

Central Heating System Pressure Check

Guidance on checking and maintaining correct system pressure.

3.2 Switching the Appliance OnOff

Instructions for powering the appliance on and off using the master switch.

3.3 Switching on the Central Heating

How to set the central heating temperature control to desired levels.

3.4 Controlling Central Heating

Steps for setting timer, room thermostat, and radiator valves for heating control.

3.5 Combination Boilers: Setting Hot Water Temperature

How to set hot water temperature and use ECO/Comfort modes.

3.6 Summer Mode, Hot Water Only

Instructions for operating the appliance for hot water only during summer.

3.7 Frost Protection

Guidance on preventing frost damage during cold periods.

3.8 Fault Condition

Procedures for identifying and resolving fault codes displayed by the appliance.

Tips on Saving Energy

Heating Economically

Advice on efficient boiler operation and modulating control for comfort.

Central Heating Systems with Room ThermostatsRadiator Valves

Optimizing heating control using thermostats and radiator valves.

Reduced-Output Operation

Methods for saving fuel by slightly reducing room temperatures.

General Information

Hot Water Energy Saving

Tips for energy saving related to hot water temperature settings and ECO button.

Cleaning the Outer Case

Instructions for cleaning the appliance's exterior.

Appliance Identification for Service

Information on identifying the appliance and preparing for customer service.

Maintaining Your Appliance

Service Contracts and Extended Warranty

Information on regular servicing and extended warranty options.

Service Centres

Fault or Breakdown

Service Engineer Attendance Conditions

Conditions for free and chargeable attendance by a service engineer.

Call-out Charge Criteria

Criteria under which a call-out charge will apply for service visits.

Fault Reporting and Contacting Support

Procedures for reporting faults and contacting customer service for assistance.

Your Bosch Guarantee

Guarantee Terms and Conditions

Terms and conditions for the 24-month guarantee against material or workmanship faults.

Guarantee Registration

Guarantee Registration Process

Instructions for completing and returning the Guarantee Registration Card.

Appliance Record Keeping

Advice on recording appliance details like model and serial number for user reference.

Operating Instructions Quick Reference

Appliance Power Management

Quick guide to turning the appliance on and off.

Central Heating Operation Summary

Summary of how to control central heating temperature and modes.

Hot Water Operation Summary

Summary of how to set and use hot water temperature and modes.

Fault Condition Reset Procedure

Quick reference for resetting the appliance during a fault condition.

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