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Honeywell Home Automatic Bypass Valve - Angled - 22mm

Honeywell Home Automatic Bypass Valve - Angled - 22mm

The Honeywell Home DU145 automatic bypass valve controls the flow of water through a bypass circui...

Best current price£60.00from City Plumbing GB

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Honeywell Home Auto By-Pass Valve With Externally Threaded 3/4" Connections Du145-3/4B

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Product Information

Full details

This guide is for homeowners and HVAC professionals using the Honeywell Home Automatic Bypass Valve (ABV). The ABV maintains optimal system pressure and prevents issues caused by reduced flow in your heating system. Note that proper installation and setting are crucial for effective operation.

All features

Model Part NumberDU145-3/4B
BrandHoneywell Home

Extended Product Information

FAQs

What is the purpose of an automatic bypass valve?

An automatic bypass valve regulates water flow in a central heating system, maintaining pressure and preventing boiler issues when some zones are closed.

Where should the ABV be installed?

It should be installed in the bypass circuit between the flow and return pipework, typically near the boiler.

What size fittings does the valve use?

The valve uses 22mm compression fittings.

How do I adjust the pressure?

Use the unique and simple adjustment mechanism on the valve to set the desired pressure.

Does the valve require maintenance?

No special maintenance is required, but check periodically for leaks and proper function.

What is the flow capacity?

The valve has a high capacity flow, up to 50 litres per minute.

What is the recommended differential pressure range?

The valve operates within a differential pressure range of 0.1 to 0.6 bar.

What happens if the pressure setting is adjusted incorrectly?

Incorrect pressure settings can affect system performance, potentially leading to noise, uneven heating, or boiler issues. Ensure the pressure is set to the correct values for your specific heating system.

Troubleshooting

System noise

Check valve setting and ensure the pressure is set correctly.

Boiler cycling frequently

Verify that the valve is installed correctly and functioning. Check for blockages in the system.

Uneven heating

Check the bypass circuit and valve setting. Ensure all zones are functioning correctly.

Pros and Cons

Pros

  • Prevents system noise.
  • Maintains even system pressure.
  • Ensures constant flow through the boiler.
  • Reduces energy consumption.
  • Simple adjustment mechanism.
  • Easy to install with 22mm compression fittings.

Cons

  • Requires proper initial setup.
  • May require periodic checks for optimal performance.
  • Specific to heating systems with a bypass circuit.
  • Requires access to the flow and return pipework for installation.
  • Setting the pressure incorrectly can affect system performance.

Setup, Compatibility & Care

  1. Installation: The valve is installed in the bypass circuit between the flow and return pipework, usually near the boiler. Use 22mm compression fittings.
  2. Compatibility: This valve is designed for use in central heating systems and is compatible with systems that have a bypass circuit. Ensure that the system meets the pressure and flow rate specifications.
  3. Pressure Setting: Use the unique and simple adjustment mechanism to set the desired pressure. The lockable setting prevents inadvertent adjustment.
  4. Care: Check the valve periodically to ensure it's operating correctly. No special maintenance is required, but it's important to ensure there are no leaks from the compression fittings.

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