Viessmann Cylinder Demand Box for System Boilers

Viessmann Cylinder Demand Box for System Boilers

The Viessmann Cylinder Demand Box (7574319) is a useful accessory for compatible Viessmann system boilers where a 230V cylinder thermostat and hot water controls are being used instead of the standard Viessmann hot water cylinder sensor.

Converts 230V Input to a Boiler Demand Signal

The Cylinder Demand Box is designed to convert the 230V AC input from the cylinder thermostat and hot water controls into the low-voltage demand signal required by compatible Viessmann Vitodens system boilers. This allows the boiler to respond correctly to a hot water demand when a conventional thermostat arrangement is being used. It provides a practical way to connect compatible external cylinder controls to the boiler while maintaining the appropriate control signal.

Compatible Viessmann System Boilers

The Cylinder Demand Box is designed for use with selected Viessmann Vitodens 050-W, 100-W and 200-W system boilers. It can be particularly useful when adapting a system to work with a 230V cylinder thermostat rather than a Viessmann hot water cylinder sensor. Always confirm compatibility with the specific boiler model and control arrangement before installation.

Complete Installation Pack

The box is supplied with the essential components needed for installation, including a mounting bracket, fixings and installation instructions. This provides installers with a convenient, manufacturer-specific solution for connecting the appropriate cylinder demand controls.

Key Features

• Viessmann Cylinder Demand Box for system boilers
• Viessmann part number: 7574319
• Designed for use with a 230V cylinder thermostat
• Suitable for compatible hot water controls
• Converts a 230V AC input into a low-voltage boiler demand signal
• Designed for compatible Viessmann Vitodens system boilers
• Suitable for Vitodens 050-W System Boilers
• Suitable for Vitodens 100-W System Boilers
• Suitable for Vitodens 200-W System Boilers

What's Included

• 1 x Cylinder Demand Box
• 1 x Mounting Bracket
• 1 x Fixings Pack
• 1 x Installation Instructions

Frequently Asked Questions

What is the Viessmann Cylinder Demand Box used for?

The Cylinder Demand Box is used with compatible Viessmann system boilers when a 230V cylinder thermostat and hot water controls are being used instead of the Viessmann hot water cylinder sensor.

What does the Viessmann Cylinder Demand Box do?

It converts the 230V AC input from compatible cylinder controls into the low-voltage demand signal required by the boiler. This allows the system boiler to recognise and respond to a hot water demand.

Which Viessmann boilers is the Cylinder Demand Box compatible with?

The Cylinder Demand Box is designed for compatible Viessmann Vitodens 050-W, 100-W and 200-W system boilers. The exact boiler and control configuration should be checked before installation to ensure compatibility.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.