SB50 XA - Pump Baxi - Free user manual and instructions

Product type	Domestic hot water circulator (wet rotor pump)
Brand	Baxi
Model	SB50 XA (SB-4X range)
Power supply	Single-phase 230 V / 50 Hz, 5 W
Protection rating	IP 42
Connection	Threaded R 1/2 (Rp 1/2)
Installation length	84 mm (type A/C: 138 mm)
Max. operating pressure	10 bar
Fluid temperature range	+2 °C to +65 °C (temporary +70 °C for 2 h)
Max. ambient temperature	+40 °C
Max. water hardness (DHW loop)	36 °fH
Integrated functions	Non-return valve on discharge side, shut-off valve on suction side
Application	Potable water only
Installation	Installation by qualified personnel, electrical connection by an electrician
Routine maintenance	Clean the exterior with a slightly damp cloth (without detergent)
Motor head replacement	Possible without draining (integrated shut-off valves)
Safety	Disconnect power before any intervention
Spare parts	Motor head, gaskets, connector, thermal insulation shell
Warranty / Compliance	CE, European directives

Frequently Asked Questions - SB50 XA Baxi

What type of fluid can the Baxi SB50 XA pump handle?

This pump is designed only for potable water. Do not use it for other liquids.

What is the maximum allowed operating pressure?

The maximum operating pressure is 10 bar.

How to bleed air from the pump after installation?

The pump self-bleeds after a short period of operation. To speed up, you can turn it on and off 5 times for 30 seconds each.

What to do if the pump does not start?

Check the power supply (fuses, circuit breaker). If the motor is blocked by deposits, call a professional to disassemble and clean the impeller.

How to replace the pump motor head?

Close the shut-off valve by turning the slot with a screwdriver to diagonal position. Disconnect the connector, unscrew the motor head and replace it. Caution, hot fluid may escape: allow the pump to cool down beforehand.

What is the allowed fluid temperature range?

The normal range is +2 °C to +65 °C, with the possibility of temporary operation up to +70 °C for a maximum of 2 hours.

How to clean the exterior of the pump?

Clean with a slightly damp cloth without using aggressive cleaning products.

What safety precautions to take before any intervention?

Always disconnect the power supply and secure it against reconnection. Electrical work must be carried out by a qualified electrician.

What possible normal noises are there?

Noises may occur during automatic bleeding or if the motor runs dry. Check that the shut-off valves are fully open and repeat bleeding if necessary.

Where to find original spare parts?

Use only original genuine spare parts from Baxi. Contact a specialized tradesperson or Baxi customer service to order the motor head, gaskets, etc.

USER MANUAL SB50 XA Baxi

Installation, Assembly and Operation Instructions for the INSTALLER and USER

6%□□; 6%□□;

Technical line drawing of a mechanical device with threaded ports and a base (no text or symbols)

1 2 3 4 5

Fig. 3: Fig. 4:

Technical illustration of two mechanical components with directional arrows indicating motion (no text or symbols)

Technical line drawing of two mechanical pressure regulator components with rotating arrows (no text or symbols)

Technical line drawing of two mechanical components with cross-sectional lines, no text or symbols present

Fig. 5: Fig. 6:

Technical diagram of a mechanical device with labeled parts and directional arrows indicating flow or movement.

Line drawing of a wrench tool interacting with a bolt and nut (no text or symbols)

Fig. 7a:

32mm 7mm

Fig. 7b:

PE N L

Fig. 7c:

Technical line drawing of a mechanical connector assembly (no text or symbols)

Fig. 7d:

click!

Fig. 7e: Fig. 8:

Technical line drawing of a mechanical component with a rotating shaft and housing (no text or symbols)

Technical diagram illustrating a mechanical assembly with numbered steps and rotation indicators

1 Safety

1.1 About these instructions

Read through these instructions completely before installation. Non-observance of these instructions can result in injury to persons and damage to the pump/unit.

Once installation work is complete, pass the instructions on to the end user.

Keep the instructions near the pump. They can be used as a reference if problems occur later.

We accept no liability for damages resulting from failure to follow these instructions.

1.2 CE Declaration of Conformity

The design and operation of this product conform to the applicable European directives and supplementary national requirements. Conformity has been demonstrated.

The Declaration of Conformity can be viewed at www.baxi.es or alternatively can be requested from your local BAXI sales office.

1.3 Safety information

Important safety information is indicated as follows:

DANGER: Indicates a danger to life due to electrical current.

WARNING: Indicates a possible danger to life or injury.

CAUTION: Indicates possible risks to the pump or other items.

NOTE: Highlights tips and information.

1.4 Qualification

The pump may only be installed by qualified personnel. This product may not be commissioned or operated by persons with insufficient accountability (including children) or who do not possess the relevant specialist knowledge. Exceptions are only permitted on appropriate instruction from safety-responsible persons. The electrical connection may only be established by a qualified electrician.

1.5 Regulations

The current versions of the following regulations must be observed when installing the equipment:

• Accident prevention regulations
- Worksheets
- Other local regulations

1.6 Conversion, spare parts

The pump must not be technically modified or converted. It is not permitted to open the pump motor by removing the plastic lid. Only use original spare parts.

1.7 Transport

Unpack and check the pump and all accessories upon receipt. Report any damage sustained in transit immediately.

Dispatch the pump in the original packing only.

1.8 Electrical current

There is a danger of an electric shock when working with electrical current. Therefore:

• Switch off the power before beginning work on the pump and make sure that it cannot be switched on again accidentally.
• Do not kink or nip the power cable or allow it to come into contact with heat sources.
• The pump is protected against drips in accordance with protection class IP 42. Protect the pump against water spray. Do not immerse in water or other fluids

2 Technical Data

2.1 Type key

SB-4X Series:

Standard secondary hot water circulation pump, glandless pump with check valves

2.2 Connections (Fig. 1)

SB-4X

Screwed connection: 15 (Rp 12 ") and check valves

2.3 Data

	SB-4X
Mains voltage	1 ~ 230 V / 50 Hz
Protection class	IP 42
Nominal diameter of connecting pipes	R 1⁄2
Installation length	84 mm (Type A/C: 138 mm)
Max. permissible operating pressure	10 bar
Permitted fluid temperature range	+2°C to +65 °C in short-term operation to 2 hours 70 °C
Max. ambient temperature +40 °C
Max. permitted hardness in secondary hot water circulation systems	36° fH

See name plate or catalogue for further information.

2.4 Scope of delivery

• Pump
  • Thermal insulation shell
• Sealing rings
• Connector
  • Installation and operating instructions

3 Principle of operation

3.1 Application

This circulator is suitable for drinking water only.

3.2 Functions (Fig. 2)

Valves

The SB-4X is equipped with a non-return valve (1) on the pressure side and with a stop valve (2) on the suction side. When exchanging the motor head (3), it is sufficient to cut the power by unplugging the connector (5) and to close the stop valve at the rotating slot (4). The motor head can then be simply unscrewed → Page 16.

4 Installation and electrical connection

4.1 Mechanical Installation

DANGER: Before starting work, make sure that the pump has been disconnected from the power supply.

Installation site (Fig. 3)

Provide a weatherproof, frost-free, dust-free and well-ventilated room for the installation. Choose an installation site that is easily accessible.

CAUTION: Dirt can cause the pump to fail. Flush the pipe system before installation.

NOTE: The stop valve and non-return valve are pre-installed.

1. Prepare the installation site so that the pump can be installed without being exposed to mechanical stresses.

2. Choose the right installation position - only as shown in (Fig. 3 A). The arrow on the back of the housing indicates the direction of flow.

Turn the motor head or remove it (Fig. 4)

1. Release the union nut - unscrew it completely if necessary.

CAUTION: Do not damage the housing seal. Replace damaged seals.

1. Turn the motor head so that the connector points downwards.

CAUTION: If the position is wrong, water can penetrate and destroy the pump.

1. Tighten the union nut again.

Open the stop valve (Fig. 5)

1. Turn slot (1) with a screwdriver so that it is parallel to the direction of flow.

NOTE: To close, turn the slot so that it is across the direction of flow.

1. Fit the thermal insulation shell.

CAUTION: The plastic parts of the motor may not be heat-insulated in order to protect the pump from overheating.

Connecting (Fig. 6)

1. Connect the pipework.

CAUTION: For the versions with stop and non-return valves, these are already pre-installed and sealed with a tightening torque of 15 Nm (hand-tight). Screwing with excessive tightening torque destroys the valve screw connection and the O ring. When installing the valve, use a fixed spanner to prevent twisting.

4.2 Electrical connection

DANGER: Only a qualified electrician is allowed to work on the electrical connection. Before establishing the connection, make sure that the connecting cable is dead.

Establish the electrical connection as follows: (Fig. 7a - Fig. 7e)

Open the connector as follows: (Fig. 8)

4.3 Filling and venting

1. Fill the system
2. The pump rotor space vents automatically after a short time in operation. This may cause noises. If necessary, switch off and on repeatedly to accelerate the bleeding. Dry running for short periods will not harm the pump.

5 Maintenance/faults

Cleaning

Clean the outside of the pump with a slightly damp cloth only. Do not use detergents.

Replacing the motor head

WARNING: When removing the motor head or pump, hot fluid may spurt out under high pressure. Allow the pump to cool down beforehand.

Close the stop valves before removing the pump → Page 16.

NOTE: When the motor is removed and running, noises and a change in rotation may occur. This is normal for this situation.

Faultless operation can only be guaranteed when the pump is operated in fluid.

Replacing the motor head → Page 16.

Order the service motor from a specialist retailer.

Faults	Causes	Remedies
Pump does not start.	Interruption in the power supply, short- circuit or defective fuses.	Have the power supply checked by a qualified electrician.
	Motor is blocked, e.g. by deposits from the water mains.	Have the pump removed by a qualified technician → Page 16. Check that the impeller can move by turning it and rinse out the dirt that has accumulated.
Pump is making noises.	Motor scraping, e.g. through deposits from the water mains.
	Running dry, too little water.	Check the check valves, they must be fully open.
	Air in the pump.	Switch the pump on/off 5 times for 30 s in each case.

NOTE: If you cannot remedy the fault, contact a specialist retailer.

6 Disposal

Damage to the environment and risks to personal health are avoided by the proper disposal and appropriate recycling of this product.

- Use public or private disposal organisations when disposing of the entire product or part of the product.

- For more information on proper disposal, please contact your local council or waste disposal office or the supplier from whom you obtained the product.

1 Sécurité

2.2 Raccordements (Fig. 1)

SB-4X