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Wilo Yonos Para St 15 7.5 Rkc High Efficiency Circulation Pump - Home Smart

Wilo Yonos Para St 15 7.5 Rkc High Efficiency Circulation Pump - Home Smart

The Wilo Yonos PARA ST 15 7.5 RKC is a high efficiency circulation pump designed for solar thermal...

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B&Q - Yonos Para St 15 7.5 Rkc High Efficiency Circulation Pump For Solar Thermal And Heating Systems

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B&QB&Q - Yonos Para St 15 7.5 Rkc High Efficiency Circulation Pump For Solar Thermal And Heating Systems
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Product Information

Full details

The Wilo Yonos PARA ST 15 7.5 RKC is a high-efficiency circulation pump for homeowners and professionals managing solar thermal and heating systems. Its key benefit is providing reliable water circulation with significant energy savings. A potential caveat is its manual control system, which requires user adjustment for optimal performance. This pump offers powerful circulation, durable construction, and flexible control options to ensure efficient heating system operation.

All features

Model Part NumberYonos PARA ST 15 7.5 RKC
BrandHome Smart

Extended Product Information

FAQs

What is the primary advantage of this circulation pump?

The primary advantage is its high energy efficiency, indicated by an Energy Efficiency Index (EEI) of ≤0.21, which helps significantly reduce electricity consumption compared to older pump models.

How do I adjust the pump's speed?

The pump features Wilo Red Knob technology. Simply turn the red knob to select between variable pressure operation or constant speed settings based on your system's requirements.

Can this pump be used with a glycol/water mixture?

Yes, the Wilo Yonos PARA ST 15 7.5 RKC is designed to work reliably with water glycol mixtures, commonly used in solar thermal systems, up to a concentration of 50% glycol.

What is the maximum head and flow rate?

The pump has a maximum delivery head of 7.6 metres and a maximum flow rate of 4.0 cubic metres per hour.

What is the expected lifespan of the pump?

The pump is constructed with durable materials like cast iron with corrosion protection, stainless steel, and reinforced composite, designed for long-term reliability in heating and solar thermal systems.

Is this pump suitable for all heating systems?

It is well-suited for most standard heating and solar thermal systems that require reliable circulation and benefit from energy savings. Ensure it meets the specific flow and head requirements of your system.

Does the pump come with integrated motor protection?

Yes, the pump includes integrated motor protection to ensure safe continuous operation and prevent damage from overheating.

Troubleshooting

Pump not running

Check that the power supply is connected and the circuit breaker is on. Ensure the system has water and there are no airlocks. Verify the pump is not set to 'off' or a minimal setting.

Reduced water flow or circulation

Check for blockages in the system's pipes or filters. Ensure the pump's speed setting is appropriate for the system's needs. Air in the system can also reduce flow; bleed the system.

Unusual noise from the pump

This could indicate cavitation (air in the system) or a foreign object in the impeller. Bleed the system to remove air. If noise persists, the pump may require inspection or professional service.

Pump overheating or shutting down

Ensure adequate ventilation around the pump. Check for system blockages that could cause the pump to work harder. The integrated motor protection should prevent permanent damage, but the cause of overheating needs to be addressed.

Pros and Cons

Pros

  • Significantly reduces energy consumption due to high efficiency motor.
  • Provides robust circulation performance for demanding heating and solar systems.
  • Durable materials ensure a long operational lifespan and resistance to corrosion.
  • Manual control is straightforward and adaptable to different system needs.
  • Compact size simplifies installation and replacement.

Cons

  • Manual speed adjustment may require user intervention for optimal efficiency.
  • Not suitable for systems requiring complex automated control.
  • Cast iron housing, while durable, can be heavy for some installations.

Setup, Compatibility & Care

Setup:

  1. Ensure the system is powered off and the water is cool before installation.
  2. The pump is designed for DN15 threaded connections and has a 130mm installation length.
  3. Connect the pump to the heating or solar thermal circuit according to local plumbing codes.
  4. Ensure the pump is oriented correctly, typically with the motor shaft horizontal, to allow proper drainage of air and prevent cavitation.
  5. Prime the pump and system by slowly refilling with water and bleeding air.
  6. Restore power to the system.

Compatibility:

  • Suitable for standard heating water systems and water glycol mixtures (up to 50% glycol).
  • Compatible with systems operating at temperatures up to 110°C.
  • Designed for 230V power supply.

Care:

  • Regularly check for leaks around the connections.
  • Periodically clean the exterior of the pump with a damp cloth.
  • Ensure the system is free of debris that could clog the pump's impeller; system flushing may be necessary.
  • Avoid running the pump dry.

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