Leave a comment and we'll get back to you. The manifold provides flow and return circulation of warm water at the correct temperature and flow rate to ensure an even, comfortable temperature across the whole floor surface. The manifold is best positioned as centrally within the building as possible. This will keep the pipe circuit lengths to a minimum, thus helping to balance the system and control the temperatures within the rooms.
The manifold is normally fitted at least mm above the floor and ideally typically situated within either utility rooms, airing cupboards, cloak rooms or an understairs cupboard, and should be accessible for maintenance and servicing. Our quick and easy HepCalc tool gives you a free quote on your next underfloor heating project in minutes. Yes, the manifold can easily be extended. Additional circuits can be added at any time up to a maximum of 15 circuits.
The maximum number of circuits on one manifold is governed by the circuit lengths. These are adjusted using the flow meters on the flow bar. The UFH design will give the correct rates at which these should be set. If the blockage is caused by a physical item, rather than air, the system will need to be flushed through, to free the debris.
To adjust the flow rates of an underfloor heating manifold you will need to adjust the flow meters by turning them to increase or decrease the flow rate. Each loop on the flow bar has a flow meter, to clearly indicate the flow rate achieved in each loop — these can be used to balance the system at the commissioning stage.
If you suspect that you might need to bleed your underfloor heating system to release the air trapped in the system you will need to check the air vents, adjusting them will enable you to dislodge air. The Ambiente stainless steel Manifold comes with a manual air vent, which can easily be upgraded to an automatic version. Close the isolating ball valves that are connected to the manifold on both bars.
Isolate all zones by screwing down the blue caps on the bottom return bar and the flow meters on the top flow bar. Open the first flow meter start furthest away from the filling valve on the top flow bar use the red collar to turn the black section fully anticlockwise, do not use grips — hand tight only.
Ensure that all other flow meters are closed, except the loop that you are flushing. Open the filling valve using the key on the reverse of the drain valve cap. Fix a suitable hose to the drain valve on the bottom bar. Fully loosen the blue protection cap on the bottom bar on the first zone to be filled. Open the tap on the mains water supply and open the drain valve on the bottom bar using the key on the reverse of the blanking cap. Run water through the loop until air is removed from the system, closing down the blue caps on each loop as it is purged.
This can now be repeated for each zone by opening the next zone, closing the flushed zone and repeating steps At this point the system can be pressure tested if required, by closing the drain valve and unscrewing all the blue protection caps — the pressure should rise slowly — allow it to rise to 4 bar and then close the filling valve and close off the mains water.
This should be left for 24 hours to check for any significant drops in pressure. To service an underfloor heating manifold you will need to check the system pressure. You need to check the pumps work, check the system interlock, check each zone switches on, check the controls are set up correctly, look for leaks and bleed the system.
Underfloor heating manifolds should only be installed by qualified underfloor heating fitters and plumbing and heating engineers. Ambiente can provide installers with all of the documentation, installation guides, wiring diagrams and technical support needed for a perfect underfloor heating installation. Get in touch with Ambiente today to request a quote!
Get In Touch. Manifolds can control multiple circuits concurrently, warming different rooms to different temperatures at different times — each zone is typically controlled by a zone-specific thermostat, which is installed within the heated area. The S3 is available in a range of sizes and configurations with the ability to control between 2 to 12 zones, making it suitable for a wide variety of hydronic systems at different scales; from a small apartment to a large commercial project. The Drain Valves are used for the initial filling and draining of the system.
They are set during the installation to configure the correct flow rate for the circuit and to provide the designed heat output for that circuit — which is determined by the floor build-up and heat losses of the area.
These flow gauges also provide a visual indication of the flow rate through each of the floor circuits. Directly attached to the Manifold is a dual-purpose thermometer and pressure gauge for ease-of-use and accurate control. The Warmup S3 Mixing Unit blends water from the heating source and the floor circuits to maintain the designed temperature for the system.
The Mixing Unit allows optimised water temperature regulation of between 20 — 60 Degrees Celsius, the ideal temperature range for water underfloor heating systems and much lower than typical radiator-based central-heating systems. Connected to the Manifold arms, or the Mixing Unit if used , the Isolation Valves allow the Manifold to be isolated and tested without affecting the primary floor circuits. The Commissioning Valves control the water flow through the individual floor circuits, allowing the system to be filled, drained and pressure tested.
The Commissioning Caps are removed and replace with Actuators, to provide individual circuit control. The Wiring Centre controls the electrical aspect of an underfloor heating system and facilitates a connection between the Manifold and its components with the heat source and thermostat.
Typically connected to the Actuators and Thermostats, the Wiring Centre coordinates the operation of the heating system. The Manifold connects the heat source — a boiler, heat-pump or other — with the water underfloor heating circuits, regulates the incoming water temperature via the Mixing Unit and distributes this warm water throughout the floor circuits for an energy-efficient heating system.
Once successfully installed and the pipework connections made, the underfloor heating circuits are initially filled and purged with water. Connection to the heat source is made via the primary heating circuit. However, if the heat source can constantly provide the necessary water temperature for the system without over-heating then a Mixing Unit may not be required.
The Mixing Unit regulates the water temperature by means of an Actuator-controlled Mixing Valve and blends the heated water from the primary heating circuit with cooler water from within the floor circuits to achieve the ideal design temperature. This temperature is configured during the installation process to match the designed heat requirements; which is determined by heat losses, floor construction, heat outputs and other variables. When correctly configured, this ensures heated zones will evenly heat the space, even where different floor finishes have been used.
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