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Danfoss HPA2 Zone Valve - 087N657900

Danfoss HPA2 Zone Valve - 087N657900

The Danfoss HPA2 is a 2-Port valve actuator designed for central heating and hot water circulation...

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B&QB&Q - Hpa2 2 Port Actuator Zone Valve Head
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City Plumbing GBDanfoss Hpa2 2-Port Valve Actuator 087N657900
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OnBuy.comDanfoss 087N657900 2 Port Valve Actuator 5013567062218
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eBayDanfoss HPA2 2 Port Motorised Valve Replacement Actuator 087N657900
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Product Information

Full details

This guide is for homeowners and building managers using the Danfoss HPA2 Zone Valve. It helps regulate central heating and hot water systems, offering reliable performance. However, it's essential to ensure compatibility with your existing valve body sizes (22mm and 28mm). This guide will help you understand its features, setup, and troubleshooting.

All features

SeriesHPA2
Model Part Number087N657900
BrandDanfoss

Extended Product Information

FAQs

What is the purpose of the Danfoss HPA2 Zone Valve?

It controls the flow of hot water in central heating and hot water systems.

What valve body sizes are compatible?

The Danfoss HPA2 is compatible with 22mm and 28mm valve bodies.

Is professional installation required?

It depends on your experience. While it is designed for easy replacement, electrical connections might require a professional.

How do I check if the valve is working?

After installation, turn on the system and observe whether the valve opens and closes in response to the thermostat.

Where can I find the wiring instructions?

Wiring instructions are provided with the product or can be found on the Danfoss website.

What should I do if the valve leaks?

Turn off the heating system immediately and contact a qualified heating engineer.

How often should I inspect the valve?

It is advisable to visually inspect the valve at least once a year.

Troubleshooting

Valve does not open or close.

Check the power supply and wiring connections. Ensure the valve is correctly installed and compatible with the valve body.

Heating system is not responding.

Verify the thermostat settings and check for any blockages in the system. Ensure the zone valve is receiving a signal from the thermostat.

Unusual noises coming from the valve.

Inspect for leaks or mechanical obstructions. Consider replacing the valve if the noise persists.

Pros and Cons

Pros

  • Effective regulation of water flow.
  • Easy to install as a replacement head.
  • Compatible with common valve sizes (22mm and 28mm).
  • Suitable for use in various building types.

Cons

  • Requires compatibility with Danfoss 2-Port valve bodies.
  • May require professional installation depending on existing setup.
  • Not compatible with all valve sizes beyond 22mm and 28mm.
  • Limited to central heating and hot water systems.

Setup, Compatibility & Care

Setup

  1. Preparation: Ensure the power to the heating system is off. Drain the system if necessary.
  2. Removal: Remove the old valve head by unscrewing it from the valve body.
  3. Installation: Align and attach the Danfoss HPA2 to the valve body, ensuring it is securely fastened.
  4. Wiring: Connect the electrical wiring according to the manufacturer's instructions. Incorrect wiring can cause the valve to malfunction.
  5. Testing: Restore power and test the valve's operation to ensure it opens and closes correctly.

Compatibility

The Danfoss HPA2 is compatible with Danfoss 2-Port valve bodies. Verify the valve body size (22mm or 28mm) before installation.

Care

  • Regular Checks: Inspect the valve periodically for any leaks or unusual noises.
  • Cleaning: Keep the area around the valve clean and free from debris.
  • Professional Service: If any issues arise, consult a qualified heating engineer.

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