Baxi Solo 3 User Manual

Supplied By www.heating spares.co Tel. 0161 620 6677
Baxi Solo 3 PFL System
Wall Mounted Powered Flue System Boiler
Gas Fired Central Heating Unit
Installation and
Servicing Instructions
Please leave these instructions with the user

Baxi Solo 3 Specifications

General

Category	Boiler
Flue Type	Conventional Flue
Warranty	2 years
Model	Solo 3
Fuel Type	Natural Gas
Mounting	Wall Mounted

Summary

1.0 Introduction

1.1 Description

Details the Baxi Solo 3 PFL System boiler and its features, including model outputs.

1.2 Installation

Outlines general installation requirements and adherence to regulations for the appliance.

1.3 Important Information

Provides crucial advice on handling man-made mineral fibre components within the appliance.

2.0 General Layout

2.1 Layout (Figs. 3 & 4)

Identifies and labels the main components of the boiler through diagrams and a list.

3.0 Technical Data

4.0 System Details

4.1 Water Circulating Systems

Specifies requirements for fully pumped sealed systems and general system conditions.

4.2 Treatment of Water Circulating Systems

Details the necessity and procedure for flushing and treating water systems to prevent corrosion.

4.3 Bypass Requirements

Explains the boiler's pump overrun device and requirements for system bypass circuits.

4.4 Pipework

Covers pipe sizes and connection types for the boiler's flow and return pipes.

4.5 System Components

Lists requirements for system components regarding operating temperature and pressure.

4.6 System Controls

Recommends control systems for optimum operation, including timers and thermostats.

4.7 Thermal Stores & Heat Stores

Specifies requirements for using approved thermal or heat stores with the boiler.

4.8 System Filling and Pressurising

Guides on the procedure for filling and pressurising the central heating system.

4.9 Expansion Vessel

Details the appliance's expansion vessel capacity and requirements for larger systems.

4.10 Pressure Relief Valve (Figs. 6 & 7)

Explains the operation, discharge pipe requirements, and safety settings of the relief valve.

5.0 Site Requirements

5.1 Location

Provides guidelines for selecting a suitable installation location for the appliance.

5.2 Minimum Clearances (Fig. 8)

Specifies necessary clearances around the appliance for installation and servicing.

5.3 Flue Position

Outlines general requirements for siting balanced flue terminals, including protection measures.

5.4 Flue Dimensions

Details available flue extensions and maximum lengths for various flue configurations.

5.5 Ventilation of Compartments

Addresses ventilation requirements when the appliance is installed in a cupboard or compartment.

5.6 Gas Supply

Covers requirements for gas installation and appliance connection.

5.7 Electrical Supply

Details electrical connection requirements, including earthing and isolation.

6.0 Installation

6.1 Initial Preparation

Describes the initial steps for preparing the appliance for installation, including component removal.

6.2 Initial Preparation (continued)

Continues the preparation steps, focusing on wall plate positioning and flue hole marking.

6.3 Fan Outlet Restrictor

Explains how to fit the fan outlet restrictor for rear flue installations.

6.4 Rear Flue Preparation

Details how to prepare components for a rear flue installation based on wall thickness.

6.5 Assembly of Rear Flue

Guides on assembling the rear flue duct, air duct, and terminal assembly.

6.6 Fitting the Wall Plate

Covers fitting the wall plate, making good around the air duct, and attaching the flue trim.

6.7 Left or Right Flue

Provides instructions for fitting the appliance with left or right hand side flues.

6.8 Side Flue Preparation

Details preparing components for side flue installations, including calculating and cutting flue lengths.

6.9 Fitting the Flue and Wall Plate

Describes two methods (A & B) for fitting the flue and wall plate assembly.

6.10 Method A (Cont)

Continues the instructions for Method A of fitting the flue and wall plate assembly.

6.11 Method B

Provides instructions for Method B of fitting the flue and wall plate assembly.

6.12 Terminal Guard

Advises on obtaining and ordering terminal guards for the appliance.

6.13 Fitting a Terminal Guard (Fig. 60)

Details the procedure for positioning and fixing a terminal guard to the wall.

6.14 Internal Fitting Kit

Explains how to install the internal fitting kit for walls of specific thicknesses.

6.14 Internal Fitting Kit (Cont)

Continues the instructions for installing the internal fitting kit, including sealing and securing.

6.15 Connection and Flushing

Covers connecting the pipes and performing the initial system flush.

6.16 Fitting the Combustion Box Assembly

Details the process of fitting the combustion box assembly to the wall plate.

6.17 Electrical Connections

Provides a wiring diagram and key for all electrical connections to the appliance.

6.18 Making the Electrical Connections

Guides on routing and connecting the supply cable to the boiler's terminals.

7.0 Commissioning the Appliance

7.1 Commissioning the Appliance

Outlines the step-by-step process for commissioning the boiler after installation.

7.1 Commissioning the Appliance (Cont)

Continues the commissioning procedure, including burner pressure checks and system balancing.

8.0 Fitting the Outercase

8.1 Fitting the Outercase

Describes how to fit the outer case, including infill panels and securing the door.

9.0 Overheat Cut-Off Device

9.1 Operation

Explains the function of the manual reset overheat cut-off device and how to reset it.

10.0 Annual Servicing

10.1 Dismantling the Boiler

Details the steps required to safely dismantle the boiler for annual servicing.

10.2 Cleaning the Combustion Box

Provides instructions for cleaning the combustion box components, including burner and baffles.

10.3 Cleaning the Heat Exchanger

Explains how to clean the heat exchanger fins to ensure efficient operation.

10.4 Cleaning the Burner Injector

Guides on removing, cleaning, and refitting the burner injector.

10.5 Cleaning the Pilot

Details the procedure for cleaning the pilot assembly, including electrode and injector.

11.0 Changing Components

11.1 Changing Components

General safety precautions before changing any boiler components.

11.2 Replacing the Circuit Board

Step-by-step guide for replacing the main circuit board of the appliance.

11.3 Ignition Electrode (Fig. 109)

Instructions for disconnecting and replacing the ignition electrode.

11.4 Gas Valve (Fig. 110 & 111)

Details the procedure for replacing the gas valve, including electrical and pipe connections.

11.5 Thermostat Sensor (Fig.112 & 113)

Instructions for disconnecting and replacing the thermostat sensor.

11.6 Over-Heat Thermostat (Fig.112 & 113)

Guides on how to disconnect and replace the overheat thermostat.

11.8 Fan (Fig. 116)

Instructions for removing and fitting a new fan assembly for the appliance.

11.9 Pressure Switch (Fig. 117)

Details how to disconnect and replace the pressure switch.

11.10 Burner (Fig. 118)

Instructions for removing and refitting the burner assembly.

11.11 Burner Injector (Fig. 120)

Guides on replacing the burner injector.

11.12 Pilot Burner Injector (Fig. 121)

Details how to replace the pilot burner injector.

11.13 Gas Manifold (Fig. 123)

Instructions for removing and refitting the gas manifold.

11.15 Pump (Head Only) (Fig. 128)

Steps for replacing only the pump head of the appliance.

11.16 Pump (Complete) (Fig. 125 & 127)

Instructions for replacing the complete pump assembly.

11.16 Pressure Gauge

Guides on how to replace the pressure gauge on the appliance.

11.17 Pressure Relief Valve (Fig. 129)

Instructions for replacing the pressure relief valve.

11.18 Re-pressurising Expansion Vessel

Details the procedure for repressurising the expansion vessel after maintenance.

12.0 Short Parts List

12.1 Short Parts List

A list of common replacement parts with their key numbers and manufacturer part numbers.

13.0 Fault Finding

Testing Potentiometer

Detailed instructions for testing the potentiometer using a multimeter.

Two Pin Connector

Specific instructions for testing potentiometers with a two-pin connector.