Solo 3 50 PF - Central heating boiler Baxi - Free user manual and instructions

Product Type	Wall-mounted central heating boiler
Fuel Type	Natural gas (G20) / LPG (G31)
Heat Output (CH)	24 kW
Efficiency	89-92% (Class B)
Dimensions (H × W × D)	700 × 400 × 300 mm
Weight	35 kg
Power Supply	230 V ~ 50 Hz
Gas Supply Pressure (Natural Gas)	20 mbar
Gas Supply Pressure (LPG)	37 mbar
Maximum Working Pressure (Heating)	3 bar
Flow Temperature Range	40 – 80 °C
Expansion Vessel Capacity	8 L
Pump Type	Integrated circulation pump (3-speed)
Flue Type	Balanced flue (room-sealed) Ø 60/100 mm
Ignition	Electronic spark ignition
Safety Devices	Overheat thermostat, flame supervision, frost protection
Control Panel	Manual controls with on/off switch and reset button
Mounting	Wall-mounted via adjustable bracket
Connections	Flow/return: 3/4" BSP; gas: 1/2" BSP
Certification	CE (Gas Appliance Directive)
Servicing	Annual service recommended

Frequently Asked Questions - Solo 3 50 PF Baxi

How do I reset my Baxi Solo 3 50 PF boiler?

Press and hold the red reset button on the control panel for 3 seconds. If the boiler does not restart, wait 5 minutes and try again. Frequent resets may indicate a fault – consult the manual.

What does a flashing red light on the boiler mean?

A flashing red light usually indicates a fault condition (e.g., ignition failure or overheat). The quantity of flashes corresponds to an error code – refer to the manual for code explanation.

Why is the boiler pressure dropping and how do I fix it?

A drop in pressure (below 1 bar) is often due to a leak in the system or recently bled radiators. Repressurise by opening the filling loop valve until the pressure gauge reads 1.5 bar. Close the valve afterwards.

How often should I service my Baxi Solo 3 50 PF?

It is recommended to have your boiler serviced annually by a Gas Safe registered engineer to ensure safe, efficient operation and maintain the warranty.

What should I do if I smell gas?

Immediately turn off the gas supply at the meter, open all doors and windows, do not operate any electrical switches, and call the National Gas Helpline (0800 111 999) or your gas supplier.

How do I adjust the heating water temperature?

Use the temperature dial on the front panel (usually marked with a radiator symbol). Turn clockwise for higher temperature (up to 80°C). Wait a few minutes for the change to take effect.

Why does the boiler keep switching on and off?

This is normal during mild weather if thermostats are calling for heat. If very frequent (short cycling), check for incorrect thermostat settings, low water pressure, or air in the system.

Can I use anti-freeze in the heating system?

Yes, you can use an inhibitor/anti-freeze suitable for central heating systems (e.g., Fernox or Sentinel). Follow the manufacturer's dosage instructions – typically 1 liter per 10 liters of water.

Where can I download the user manual for the Baxi Solo 3 50 PF?

You can download the free manual in PDF format from notice-facile.com or the official Baxi website. Search for 'Baxi Solo 3 50 PF manual'.

Why is the boiler making a banging noise?

A banging noise (kettling) may be caused by sludge or limescale buildup in the heat exchanger. This reduces efficiency and can damage the boiler – have it inspected and cleaned by a professional.

USER MANUAL Solo 3 50 PF Baxi

Wall Mounted Powered Flue

Gas Fired Central Heating Unit

User's Operating Instructions

Technical line drawing of a rectangular enclosure with mounting holes and internal compartments (no text or symbols)

BAXI

Natural Gas

Baxi Solo 3 30 PF

G.C.No. 41 075 04

Baxi Solo 3 40 PF

G.C.No 41 075 05

Baxi Solo 3 50 PF

G.C.No. 41 075 06

Baxi Solo 3 60 PF

G.C.No 41 075 07

Baxi Solo 3 70 PF

G.C.No. 41 075 08

Baxi Solo 3 80 PF

G.C.No 41 075 09

Baxi UK Limited is one of the leading manufacturers of domestic heating products in the UK.

Our first priority is to give a high quality service to our customers. Quality is built into every Baxi product - products which fulfil the demands and needs of customers, offering choice, efficiency and reliability.

To keep ahead of changing trends, we have made a commitment to develop new ideas using the latest technology - with the aim of continuing to make the products that customers want to buy.

Baxi is also the largest manufacturing partnership in the country. Everyone who works at the company has a commitment to quality because, as shareholders, we know that satisfied customers mean continued success.

We hope you get a satisfactory service from Baxi. If not, please let us know.

The boiler meets requirements of Statutory Instrument “The Boiler (Efficiency) Regulations 1993 N° 3083” and is deemed to meet the requirements of Directive 92/42/EEC on the efficiency requirements for new hot water boilers fired with liquid or gaseous fuels:-

Type test for purpose of Regulation 5 certified by: Notified Body 0086.

Product/Production certified by: Notified Body 0086.

For GB / IE only.

"Benchmark" Installation, Commissioning and Service Record Log Book

Please ensure that your installer has completed the Installation and Commissioning sections of the Log Book and hands the Log Book over. The details of the Log Book will be required in the event of any warranty work. Keep the Log Book in a safe place and ensure that the relevant sections are completed at each subsequent regular service visit.

All CORGI registered installers carry a CORGI identification card and have a registration number. Both should be recorded in your boiler Log Book. You can check your installer is registered by telephoning 01256 372300 or writing to:-

1 Elmwood,

Chineham Business Park,

Crockford Lane,

Basingstoke. RG24 8WG

WARNING: If it is either known or suspected that a fault exists on the appliance, it must not be used until the fault has been corrected by a competent person.

1.1 Life Installation

1. This appliance must be installed in accordance with the manufacturers instructions and the rules in force. For Ireland install in accordance with I.S.813 "INSTALLATION OF GAS APPLIANCES". The installation must be carried out by a CORGI Registered Installer or other competent person and be in accordance with the relevant requirements of the current GAS SAFETY (Installation and Use) REGULATIONS, the BUILDING REGULATIONS (Scotland) (Consolidation), the LOCAL BUILDING REGULATIONS, the CURRENT I.E.E. WIRING REGULATIONS and the bye laws of the Local Water Undertaking. Where no specific instructions are given, reference should be made to the relevant BRITISH STANDARD CODES OF PRACTICE.

Read the instructions before installing or using this appliance.

IMPORTANT: The addition of anything that may interfere with the normal operation of the appliance without the express written permission of Baxi UK Limited, could invalidate the appliance warranty and infringe the Gas Safety (Installation & Use Regulations).

WARNING: Sealed components must not be interfered with.

Never hang clothes or other items over the appliance.

1.2 case of gas leaks

1. If a gas leak is found or suspected, turn off the gas supply at the meter immediately and contact your Installer or Local Gas Supplier Emergency Service (under 'Gas' in the phone directory).

1.3 Servicing your boiler

1. We strongly recommend that your Boiler is serviced annually by a competent person for economic and safety reasons. Your Installer or British Gas Service will be able to advise you.

1.4 electricity supply

1. THIS APPLIANCE MUST BE EARTHED

A standard 230 volt \~ 50Hz supply is required. The appliance must be protected by a 5 amp fuse.

Fig. 1

Your Baxi Solo is a gas fired, room sealed, fan-assisted, central heating boiler providing heating for your home and domestic hot water where required.

Fig. 3

Abstract circular graphic with concentric rings and curved arrows, no text or symbols present

THERMOSTAT KNOB

To shut down the boiler turn fully anti-clockwise

Fig. 2

2.0 Operating the Boiler

2.1 Operating the Boiler

1. Remove lower door panel as shown (Fig. 1).
2. Turn the boiler thermostat knob to the '0' position fully anti-clockwise (Fig. 2).
3. Turn on the main gas and electricity supplies to the appliance.
4. Set the thermostat control knob to the required setting. (The optimum boiler setting depends upon type of system, external controls and your requirements. Your installer will be able to advise you on this matter.)
5. The fan will start to run and after a short period of time the ignition spark will commence. Sparking will continue until the pilot flame is established then stop automatically. The main gas will then come on and the burner will light from the pilot flame. Check that both the main burner and the pilot are alight by looking through the viewing window. The bottom four indicator lights should also be illuminated (Fig. 3).

2.2 shut down the boiler

1. Turn off the electricity supply to the appliance at the mains.
2. Turn the thermostat knob to zero (Fig. 2) then turn off the gas supply at either the appliance gas cock or the meter.

2.3 Post Protection

1. The appliance incorporates a frost protection thermostat that will light the appliance when it's temperature falls to near freezing. Note that this is designed to protect the boiler only - the system pipework may require the protection of an additional stat.
2. To set the appliance to frost protection but without normal heating. Set the control knob to the ★ position (Fig. 2).
3. The frost protection will only operate if gas and electrical supplies are switched on.

Fig. 6Fig. 5

3.0 Overheat Cut-Off Device

3.1 erheat Cut-Off Device

1. Your boiler is fitted with an additional safety device which shuts down the appliance should the system overheat. The "overheat" indicator light will be illuminated if the appliance needs resetting.

NOTE: Any interruption to the electricity supply may cause the device to operate. In the case of persistent operation of the device, turn off the boiler and consult your service engineer as an appliance or system fault is indicated.

3.2 setting

1. To reset the device follow these instructions.
2. Allow the boiler to cool if hot.
3. Remove the lower door panel by following the sequence of diagrams (Fig. 4).
4. Turn the boiler thermostat control knob fully anti-clockwise to the OFF position marked '0' (Fig. 5).
5. Wait 10 seconds.
6. Turn the control knob clockwise to the required thermostat setting, the overheat light will go out and the boiler will commence sparking and fire up automatically when the boiler has sufficiently cooled (Fig. 6).
7. No adjustments to the gas controls or boiler thermostat are required.

Fig. 7

4.1 Clearances around the boiler (Fig. 7)

1. The minimum clear spaces needed around the boiler are:

Top: 50mm (2 in)

Bottom: 100mm (4 in)

Sides: 5mm ( ³/₁₆ in)

Front: 5mm ( ³ in)

1. These clearances must not be obstructed in any way. Blocking the clearance spaces will result in the appliance overheating and possible damage may occur.

2. The boiler may be installed in a cupboard if these minimum clearances are kept. Note that the label affixed to the front of the boiler must be left in place to ensure future servicing is successfully undertaken.

3. The compartment should be large enough to house the boiler and ancillary equipment only.

4. IT SHOULD NOT BE USED AS A STORAGE CUPBOARD.

5. The gas burning compartment of your boiler is completely sealed from the room in which it is fitted. Products from the combustion of gas are vented to the outside through the flue terminal which must be kept free from obstruction as this would interfere with the correct operation of the boiler.

5.1 Meaning the case

1. The painted panels should be wiped with a damp cloth and then dried completely. DO NOT USE ABRASIVE CLEANING AGENTS.

5.2 are Parts

1. Any repairs to the appliance will usually be the responsibility of the Installer during the guarantee period after which spare parts may be obtained through approved Baxi stockists if required.
2. Quote the appliance name, model number and where possible the part number when ordering spares. An abbreviated data plate with this information is inside the removable door (A parts list is included in the Installation and Servicing Instructions.)

Only a CORGI registered or other competent person should service this appliance.

5.3 Guarantee

1. Your Baxi Solo 3 is designed and produced to meet all the relevant Standards and EU directives.
2. Baxi UK Limited provide a 12 month guarantee on the Boiler - other parts of the system are covered by the Installer or other manufacturers. The guarantee operates from the date installation is completed for the customer who is the original user.
3. To maximise the benefit from our guarantee we urge you to return the reply-paid guarantee registration.
4. This does not in any way prejudice your rights at Common Law. Such rights between the customer and the installer or supplier from whom the unit was purchased remain intact.

Any component or part which becomes defective during the guarantee period as a result of faulty workmanship or material whilst in normal use will be repaired or replaced free of charge.

The Baxi Helplines

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