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What is an underfloor heating manifold?

An underfloor heating manifold serves as the heart of a wet underfloor heating system. Managing the distribution of heated water from the heat source to different zones. The underfloor heating manifold provides precise control over each zone by regulating the flow and temperature of water. This control provides savings by enhancing your heating efficiency. A manifold permits uniform and optimal heating conditions across the entire home.

Underfloor heating manifold diagram

Blending Valve
A blending valve regulates the temperature of the water circulating within the UFH system. The temperature of the hot water from the heat source may be high, reaching around 80 °C. The standard temperature in an UFH circuit is 50 °C. The blending valve adds the cooler water returning from the loops to the hot water from the heat source. This adjusts the overall temperature to match the desired set point. This precise temperature control provides optimal performance of the heating system.

Actuators
An actuator connects to the underfloor heating manifold above each of the return ports. Each actuator is responsible for controlling the flow of hot water through the pipes. Coordinating with the wiring centre, each actuator controls a single loop in the system. When the actuator receives a signal, it can open or close adjusting the flow of water through the pipe. Actuators adjust the flow of water, ensuring precise temperature control in each loop.

Pump
The pump connects to the UFH manifold and is the main driving force behind the underfloor heating system. The pump’s primary function is to circulate heated water from the heat source through all pipes connected to the system. Using an efficient pump maintains the correct flow rate of water through the UFH system.

Manifolds

Actuators

Control Pack

Troubleshooting underfloor heating manifold FAQs

Below is a quick guide for identifying problems with your underfloor heating manifolds.

  1. Power Supply: The thermostats and wiring centre are the powered components of the system. Ensure both receive power and are working correctly. The pump and actuator are powered through the wiring centre. Ensure there is no interruption in the power supply.
  2. Thermostat: Verify that the thermostats are set to the desired temperature. The thermostats will indicate when they are signalling for heat. Check the related actuator to see if the valve is open.
  3. Valve: Ensure valves are not stuck or blocked. Valves can get jammed due to debris or sediment build-up.
  4. Pressure: Check the pressure flow meters on the manifold. Ensure system pressure in all loops is within the recommended 1 and 2 bars. other measurements could indicate problems in the system.
  5. Balancing: Uneven heating or colder spots in certain areas could indicate imbalances in the system or incorrect zoning settings.
  6. Temperature: Check the temperature difference in the flow and return rails. Indicated on the 2 dials on our standard control pack. The temperature drop should be around 5-10 °C. If the value is out with this range, the circulation pump or flow rates may be the cause.
  7. Call VPS: If you’re uncertain about the problem, give us a call. We will do our best to identify any issues in the system.