Wilo Yonos PICO 25/1-6-130 Circulating Pump

The Wilo Yonos PICO 25/1-6-130 circulator pump, reference 4215516, is a high-efficiency electronic wet-rotor pump designed for water circulation in heating and air conditioning systems. It offers a maximum flow rate of 3.6 cubic meters per hour, a maximum head of 6 meters, and an especially compact installation length of 130 millimeters.

Equipped with an ECM synchronous motor and integrated electronic control, it adapts its operation to the hydraulic requirements of the system. It allows selection of variable differential pressure, constant differential pressure, or constant speed with three curves, so it can be adjusted to both radiator systems and underfloor heating.

Wilo Yonos PICO 25/1-6-130 electronic circulator pump

The Yonos PICO is a maintenance-free wet-rotor circulator pump with threaded connection. It is designed to achieve efficient water circulation in building hydraulic systems, automatically adjusting motor output according to the selected control mode.

Its 130-millimeter connection length is especially useful in installations where available space is limited and also makes it easier to replace existing pumps with the same installation length.

Maximum flow rate of 3.6 cubic meters per hour

The Wilo Yonos PICO 25/1-6-130 provides a maximum flow rate of 3.6 cubic meters per hour. The actual flow rate depends on the pressure losses in the circuit, the selected head, and the configured control mode.

The integrated electronics automatically reduce performance when the system requires less circulation, preventing the pump from operating continuously at maximum power.

Maximum head of 6 meters

This model reaches a maximum head of 6 meters, offering the capacity to operate in heating and air conditioning circuits with different levels of hydraulic resistance.

The operating point should always be selected within the pump characteristic curve and according to the flow rate and differential pressure required by the installation.

Three control modes

The pump allows selection of three operating strategies to suit different circuit types:

• Variable differential pressure: the pump reduces differential pressure when the required flow decreases, making it especially suitable for circuits with thermostatic valves.
• Constant differential pressure: maintains the selected differential pressure almost constant, an appropriate option for many underfloor heating installations.
• Constant speed: allows selection between three fixed-speed curves for applications requiring constant hydraulic behavior.

Suitable for radiators and underfloor heating

Wilo allows the control mode to be selected according to the application for radiator heating or underfloor heating. This flexibility makes it easier to adapt the pump to new installations as well as replacement or modernization work on existing systems.

LED display with operating information

The Yonos PICO includes a segment LED indicator that allows the main operating parameters to be checked directly from the front.

The display can show:

• Selected setpoint value.
• Current flow rate.
• Instantaneous power consumption.
• Fault codes.

This information makes commissioning, adjustment, and basic pump diagnostics easier without the need for external equipment.

Configuration via Wilo green button

The characteristic Wilo green button allows the main operating parameters to be selected easily. The installer can configure the control mode and setpoint directly from the front of the pump.

Manual venting function

The pump incorporates a manual venting function designed to remove air accumulated in the motor compartment during commissioning or after work carried out on the hydraulic circuit.

Proper air removal promotes stable operation and helps reduce noise associated with air in the system.

Automatic unlocking and manual restart

The motor is designed to be blockage-resistant and includes an automatic unlocking function. The electronics also allow a manual restart when necessary after certain incidents.

Motor protection is integrated into the unit itself, simplifying electrical installation.

ECM synchronous motor

The Wilo Yonos PICO 25/1-6-130 uses a high-efficiency synchronous motor with ECM technology and electronic power control.

Speed can vary approximately between 700 and 4,200 revolutions per minute, adapting to the control mode and the required operating point.

Electrical consumption between 4 and 40 watts

Electronic control allows energy consumption to be adapted to the actual needs of the circuit. Wilo specifies a minimum consumption of 4 watts and a maximum of 40 watts.

The motor rated power is 30 watts. When hydraulic demand decreases, the pump can reduce both speed and electrical consumption.

Energy efficiency index equal to or lower than 0.20

The pump has an energy efficiency index equal to or lower than 0.20, a value that Wilo identifies as a reference for high-efficiency circulator pumps.

The combination of ECM motor and electronic control helps reduce consumption compared with conventional circulator pumps that operate continuously at fixed speed.

Single-phase 230-volt power supply

The Yonos PICO operates with a single-phase 230-volt power supply, with a 10 percent tolerance, and is compatible with 50 or 60 hertz frequencies.

Electrical connection is simplified by the Wilo quick connector, designed to speed up wiring during installation and maintenance tasks.

Fluid temperature between -10 and 95 degrees Celsius

The permitted fluid temperature range is between -10 and 95 degrees Celsius, allowing the pump to be used in different heating and air conditioning applications.

The permitted ambient operating temperature is between -10 and 40 degrees Celsius.

Maximum operating pressure of 10 bar

The Wilo Yonos PICO 25/1-6-130 is designed to operate at a maximum pressure of 10 bar.

Wilo also specifies minimum inlet pressure conditions to avoid hydraulic problems: a minimum inlet head of 0.5 meters at 50 degrees Celsius and 3 meters at 95 degrees Celsius.

DN 25 connection and 130-millimeter installation length

The pump features a G 1 1/2 threaded connection, corresponding to an alternative RP 1 connection and nominal diameter DN 25.

The distance between connections is only 130 millimeters, one of the main features of this version compared with the 180-millimeter Yonos PICO models.

• Pipe connection: G 1 1/2.
• Alternative connection: RP 1.
• Nominal diameter: DN 25.
• Length between threads: 130 millimeters.

Durable, maintenance-free construction

The pump body is made of grey cast iron. The impeller uses polypropylene reinforced with 40 percent glass fiber, while the shaft is made of stainless steel.

The bearings are made of metal-impregnated carbon and are designed for the characteristic operation of a wet-rotor circulator pump.

IPX4D protection and insulation class F

The motor has an IPX4D protection rating and insulation class F.

The pump also complies with applicable electromagnetic compatibility requirements and carries CE, VDE, and EAC approvals and markings.

Integrated particle filter

Wilo's technical data sheet indicates that the pump includes a particle filter as part of its equipment, helping protect internal components from certain particles present in the circuit.

Compact dimensions and reduced weight

The 130-millimeter version is specially designed for installations where the pump footprint needs to be minimized.

• Total length: approximately 138 millimeters.
• Height: approximately 102 millimeters.
• Width: approximately 131 millimeters.
• Installation length between threads: 130 millimeters.
• Net weight: approximately 1.6 kilograms.

Technical features of the Wilo Yonos PICO 25/1-6-130

• Brand: Wilo.
• Range: Yonos PICO.
• Reference: 4215516.
• Model: Yonos PICO 25/1-6-130.
• EAN: 4048482758480.
• Product type: electronic wet-rotor circulator pump.
• Application: heating and air conditioning.
• Maximum flow rate: 3.6 cubic meters per hour.
• Maximum head: 6 meters.
• Maximum operating pressure: 10 bar.
• Fluid temperature: between -10 and 95 degrees Celsius.
• Ambient temperature: between -10 and 40 degrees Celsius.
• Power supply: single-phase 230 volts, with 10 percent tolerance.
• Frequency: 50 or 60 hertz.
• Motor rated power: 30 watts.
• Minimum consumption: 4 watts.
• Maximum consumption: 40 watts.
• Minimum speed: 700 revolutions per minute.
• Maximum speed: 4,200 revolutions per minute.
• Energy efficiency index: equal to or lower than 0.20.
• Control modes: variable differential pressure, constant differential pressure, and constant speed with three curves.
• Display: segment LED indicator.
• Display information: setpoint, current flow rate, power consumption, and fault codes.
• Venting function: manual.
• Automatic unlocking: yes.
• Manual restart: yes.
• Blockage-resistant motor: yes.
• Integrated motor protection: yes.
• Particle filter: yes.
• Electrical connection: Wilo quick connector.
• Hydraulic connection: G 1 1/2.
• Alternative connection: RP 1.
• Nominal diameter: DN 25.
• Installation length: 130 millimeters.
• Pump housing: grey cast iron.
• Impeller: glass fiber reinforced polypropylene.
• Shaft: stainless steel.
• Bearings: metal-impregnated carbon.
• Protection rating: IPX4D.
• Insulation class: F.
• Total length: 138 millimeters.
• Height: 102 millimeters.
• Width: 131 millimeters.
• Net weight: approximately 1.6 kilograms.
• Approvals and markings: CE, VDE, and EAC.

Compact 130-millimeter pump for radiators and underfloor heating

The Wilo Yonos PICO 25/1-6-130 combines a maximum flow rate of 3.6 cubic meters per hour, a head of up to 6 meters, and an installation length of only 130 millimeters, making it especially suitable for installations where available space is limited.

Its ECM motor, electronic control, low consumption, LED display, venting function, automatic unlocking, and different operating modes make installation and adjustment easier in radiator circuits, underfloor heating, and other heating and air conditioning applications.