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United Kingdom
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Installation and Service Manual & Boiler Fiche
High-efficiency wall-hung condensing gas boiler
500 System 2
15 - 18 - 24
These instructions include the Benchmark Commissioning Checklist & Boiler Fiche and should be left
with the user for safe keeping. They must be read in conjunction with the Flue Installation Guide.
For LPG conversion see p.47.
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Table of Contents
Related Manuals for Baxi 515 System 2
Summarization of Contents
Baxi 500 System 2 Installation and Service Manual
Installation and Service Manual & Boiler Fiche
Comprehensive guide for installation and service of the boiler.
High-efficiency wall-hung condensing gas boiler
Details about the boiler's type and efficiency.
1 Safety
1.1 Benchmark
Information on the Benchmark scheme for boiler installation and servicing.
1.2 General safety instructions
Essential safety guidelines for operating and maintaining the boiler.
1.3 Recommendations
Recommended practices for safe installation and use.
1.4 Specific safety instructions
Detailed safety precautions for specific situations.
1.5 Liabilities
Defines responsibilities of manufacturer, installer, and user.
2 About this manual
2.1 General
Introduction to the manual's purpose and intended audience.
2.2 Additional documentation
Lists related documents required for installation and operation.
2.3 Symbols used
Explains the meaning of symbols used throughout the manual for safety.
2.4 Abbreviations/Glossary
Provides definitions for technical terms and abbreviations.
3 Technical specifications
3.1 Homologations
Details certifications and compliance with standards and directives.
3.2 Technical data
Contains detailed performance and operational data for the boiler.
3.3 Dimensions and connections
Illustrates boiler dimensions and connection points.
3.4 Electrical diagram
Shows the boiler's internal wiring diagram.
4 Description of the product
4.1 General description
Overview of the boiler's purpose, features, and benefits.
4.2 Operating principle
Explains how the boiler functions, including combustion and heat transfer.
4.3 Main Components
Identifies and illustrates the primary parts of the boiler.
4.4 Control panel description
Details the functions of the control panel, buttons, and display.
5 Before installation
5.1 Installation standards and rules
Outlines regulations and standards that must be followed during installation.
5.2 Installation requirements
Specifies prerequisites and conditions for boiler installation.
5.2.1 Gas supply
Requirements for the gas supply connection and standards.
5.2.2 Electrical supply
Specifies electrical supply requirements and safety measures.
5.2.3 Hard water area
Advice on water quality and softening in hard water areas.
5.2.4 Bypass
Information on the integral and optional bypass requirements.
5.2.5 System control
Requirements for external controls like thermostats for efficient operation.
5.2.6 Treatment of water circulating systems
Guidelines for treating system water to prevent corrosion and damage.
5.2.7 Showers
Recommendations for shower controls used with the appliance.
5.2.8 Expansion vessel (CH only)
Details on the expansion vessel, its charge pressure, and capacity.
5.2.9 Safety pressure relief valve
Information on the safety relief valve, discharge pipe, and its requirements.
5.3 Flow rate/head at the plate characteristics
Graph and explanation of the boiler's flow rate and head performance.
5.4 Choice of the location
Guidance on selecting a suitable location for the boiler installation.
5.4.1 Location of the boiler
Requirements for siting the boiler, including wall mounting and frost protection.
5.4.2 Bath and shower rooms
Regulations for installing boilers in bathrooms and shower areas.
5.4.3 Ventilation
Notes on ventilation requirements for installed boilers.
5.4.4 Condensate drain
Detailed instructions for installing and terminating the condensate drain pipe.
5.4.4 Condensate drain
Continued instructions for condensate drain installation and prevention of freezing.
5.4.5 Clearances
Minimum clearances required around the boiler for installation and maintenance.
5.4.6 Flue/chimney location
Guidelines for siting balanced flue terminals, considering plume dispersal.
5.4.6 Flue/chimney location
Further details on flue terminal positioning relative to boundaries and openings.
5.4.7 Horizontal flue/chimney systems
Instructions for installing horizontal flue extensions and their lengths.
5.4.7 Horizontal flue/chimney systems
Further guidance on flue protrusion and joint sealing.
5.4.8 Flue/chimney trim
Information on fitting flexible flue trims.
5.4.9 Terminal guard
Details on when and how to install a terminal guard.
5.4.10 Flue/chimney deflector
Instructions for fitting a flue deflector.
5.4.11 Flue/chimney accessories
Reference to further details on flue accessories.
5.4.12 Data plate and boiler service label
Location and importance of the data plate and LPG conversion label.
5.5 Transport
Guidelines for transporting the boiler safely.
5.6 Unpacking & initial preparation
Steps for safely unpacking and preparing the boiler.
5.6.1 Unpacking
Detailed steps for unpacking the boiler and its components.
5.6.2 Initial preparation
Steps for preparing the installation site and mounting the bracket.
5.7 Connecting diagrams
Overview of connection diagrams for the system.
5.7.1 Filling information
Guidance on filling the system with water and relevant regulations.
6 Installation
6.1 General
General requirements for installing the boiler according to regulations.
6.2 Assembly
Steps for assembling the boiler and its components.
6.2.1 Fitting the pressure relief discharge pipe
Instructions for installing the pressure relief discharge pipe.
6.2.2 Connecting the condensate drain
Steps to connect the condensate drain pipe to the boiler.
6.3 Air supply/flue gas connections
Procedures for connecting the air supply and flue gas system.
6.3.1 Connecting the flue/chimney
Detailed steps for connecting the flue/chimney to the boiler.
6.3.1 Connecting the flue/chimney
Further steps for connecting and securing the flue/chimney.
6.4 Electrical connections
Instructions for making the electrical connections to the boiler.
6.4.1 Accessing the electrical connections
How to access the boiler's connection points.
6.4.2 Connecting the room thermostat
Steps for connecting a room thermostat or OpenTherm device.
6.4.3 Service connection (SERVICE)
Connecting a wireless interface for service purposes.
6.4.4 Connecting on wall outdoor sensor
How to install and connect an external outdoor temperature sensor.
6.4.5 Connecting the outside sensor (OS)
Specific connection terminal for the outdoor sensor.
6.4.6 Identifying label
Information about the identifying label for weather compensation.
6.5 Filling the installation
Procedures for filling the heating system and checking the condensate trap.
6.5.1 Flushing the system
Instructions for flushing the heating system.
6.5.2 Fill the installation
Steps for filling the heating system and relevant regulations.
6.5.3 Filling the condensate trap
Ensuring the condensate trap is primed.
6.6 Draining the installation
How to drain the heating installation.
7 Commissioning
7.1 General
Overview of the commissioning process and its purpose.
7.2 Checklist before commissioning
Pre-commissioning checks to ensure safety and proper setup.
7.3 Commissioning procedure
Step-by-step guide for commissioning the boiler.
7.4 Gas settings
Procedures for setting and adjusting gas parameters.
7.4.1 Check the operational (working gas inlet pressure and gas rate)
How to check gas pressure and rate for correct operation.
7.4.2 Combustion parameters
Measuring and analyzing combustion gases for efficiency and safety.
7.4.2 Combustion parameters
Continued explanation of combustion checks and activating chimney sweep mode.
7.4.3 LPG conversion procedure
Step-by-step guide to convert the boiler for LPG use.
7.4.4 Service settings
Table of fan parameters and combustion settings for service.
7.4.5 Adjusting the gas valve
Detailed procedure for adjusting the gas valve for optimal combustion.
7.5 Final instructions
Concluding steps and advice for handover.
7.5.1 Handover
Procedures for handing over the boiler and documentation to the user.
8 Operation
8.1 Use of the control panel
How to navigate and use the boiler's control panel.
8.1.1 Browsing the menus
Steps to access and navigate through the menu options.
8.1.2 Running the automatic detection function
Procedure for running the auto-detect function after PCB replacement.
8.1.3 Information menu display
How to view information displayed in the Information menu.
8.2 Start-up
Procedures for initial startup and operation.
8.2.1 Procedure for first start-up
Detailed steps for the initial startup sequence of the boiler.
8.2.2 Changing the heating flow temperature
How to adjust the flow temperature for heating mode.
8.2.3 Changing the domestic hot water (DHW) temperature
How to adjust the DHW temperature setting.
8.3 Shutdown
Instructions for shutting down the boiler's heating and DHW functions.
8.4 Degassing function
Explanation and procedure for using the degassing function.
8.5 Frost protection
Information on the boiler's frost protection feature and its limitations.
9 Settings
9.1 Accessing the settings
How to navigate and access the boiler's settings menu.
9.2 List of parameters
A table detailing various adjustable parameters and their ranges.
9.2.1 Resetting factory settings
Procedure for resetting the boiler's settings to factory defaults.
9.3 Setting the parameters
General guidance on setting operational parameters.
9.3.1 Setting the heating curve
How to adjust the heating curve based on external conditions.
9.4 Reading out measured values
How to access and view the boiler's current operational values.
9.4.1 Statuses and sub-statuses
Explanation of boiler operating statuses and sub-statuses.
9.4.1 Statuses and sub-statuses
Lists of possible boiler statuses and sub-statuses for diagnostics.
9.5 Reading counters
How to access and view various operational counters.
10 Maintenance
10.1 General
General safety and economic recommendations for boiler servicing.
10.3 Standard inspection and maintenance operations
Routine checks and maintenance tasks for the boiler.
10.3.1 Annual Servicing
Guidelines for performing annual servicing on the boiler.
10.3.2 Checking the water pressure
How to check and maintain the correct water pressure in the heating circuit.
10.3.3 Checking the expansion vessel
Procedure for checking the expansion vessel.
10.3.4 Checking the flue gas discharge and the air supply
Checking the integrity of flue gas and air intake connections.
10.3.5 Checking the combustion
How to measure and check combustion parameters.
10.3.6 Checking the automatic air vent
Verifying the function of the automatic air vent.
10.3.7 Cleaning the siphon
Instructions for dismantling and cleaning the boiler siphon.
10.3.8 Electrode distances
Verifying the correct distances for electrodes.
10.3.9 Checking the burner and cleaning the heat exchanger
Procedures for inspecting the burner and cleaning the heat exchanger.
10.4 Specific maintenance operations
Detailed procedures for specific maintenance tasks.
10.4.1 Detection/ignition electrode replacement
How to replace the detection/ignition electrode.
10.4.2 Flow and return sensors
How to replace flow and return sensors.
10.4.3 Pressure Sensor
Procedure for replacing the pressure sensor.
10.4.4 Safety pressure relief valve
Instructions for replacing the safety pressure relief valve.
10.4.5 Pump - replacement
Steps for replacing the boiler pump.
10.4.6 Replacing the expansion vessel
Procedure for replacing the expansion vessel.
10.4.7 Replacing the PCB
How to replace the main printed circuit board (PCB).
10.4.8 Setting an uncalibrated gas valve
Procedure for calibrating an uncalibrated gas valve.
11 Troubleshooting
11.1 Temporary and permanent faults
Explains the types of faults and how they are displayed.
11.2 Error codes
Lists and explains temporary faults and their causes/solutions.
11.2 Error codes
Continues listing temporary faults and their troubleshooting steps.
11.2 Error codes
Lists more temporary faults and their causes/solutions.
11.2 Error codes
Lists permanent faults that require resetting and their troubleshooting.
11.2 Error codes
Lists more permanent faults and their causes/solutions, including a note on Room Unit faults.
12 Decommissioning
12.1 Disassembly
Step-by-step instructions for safely disassembling the boiler.
12.2 Recommissioning
Instructions for recommissioning the boiler after disassembly.
13 Disposal
13.1 Disposal and recycling
Guidelines for environmentally sound disposal and recycling of the boiler.
14 Appendix
14.1 Product fiche - System boilers
Technical data sheet for system boilers, including energy efficiency.
14.2 Package fiche - boilers
Information on the energy efficiency of packaged boiler systems.
Baxi Customer Support and Warranty Information
Baxi Customer Support Contact
Contact details and opening hours for Baxi customer support.
Warranty Maintenance Requirements
Key steps to ensure the boiler warranty remains valid.
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