FoilFloat Install Guide
| STORAGE |
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If it is necessary to store the system once you have taken delivery, ensure it is kept in the following conditions: A dry, weather tight area Out of direct sunlight Away from sharp objects or chemical spillages |
| PREPARATION |
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Please ensure: Existing slab/floor deck meets at least SR2 (5mm deviation in 2m) requirements for floor regularity (BS8204) and preferably SR1 (3mm deviation in 2m). Area is clean free of debris. You will usually require some plain insulation, this is not supplied. Always refer to your floor finish manufacturers install instructions, they may have special requirements which take precedent when laying over underfloor heating. When working with any wood or insulation based products, dust and particles can become airborne and pose a hazard to health. This is particularly relevant when machining, cutting or routing. Please follow the relevant guidelines in the product safety datasheets (available on request) on reducing the risk of dust inhalation. Always follow all safety precautions when using power tools. |
| Stage 1 |
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Edge battens: Lay battens of the same thickness as the FoilFloat System, 18mm, 25mm, 35mm or 50mm x 50mm wide around the perimeter of the room leaving a 10mm edge gap for expansion. Battens can be fixed down as required using a suitable fixing for the sub-floor you have, OMNIE cannot determine the required fixing only take care that it does not interfere with the panels or the pipework. |
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| Stage 2 |
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FoilFloat panels: Following your OMNIE CAD design to determine the pipe direction, start in the corner of the room, lay the FoilFloat panels longways against the edge batten with the panels loop end against the adjoining wall batten, continue to the other end of the run rotating the last panel so you have a looped end against the other end edge batten, the panels in between can be trimmed, also use the off cuts to fit as required across the floor in a ‘run’ repeat butting the next run to the first, continue this until the room is complete. Following your OMNIE CAD design make sure to place and orientate panel loop ends where pipe returns along the panel. Unheated areas on your design showing no pipework will require a plain insulation of the same grade and thickness (by others) to complete the insulation, do not use FoilFloat panel off-cuts to infill unheated areas as you will need these on further heated areas. Once the FoilFloat panels have been laid, they should be protected with walking boards (especially in areas with high levels of foot traffic). |
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| stage 3 |
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Installing the pipe: The minimum temperature for laying the pipe should be +5°C. Following your OMNIE CAD design, start with one end of your first coil at the manifold allowing enough length for connection, once at the start of the zone, feed the pipe into the respective channels, piercing the foil layer in the FoilFloat panels, complete the circuit returning the other end to the manifold. Again once the pipes have been laid, they should be protected with walking boards (especially in areas with high levels of foot traffic). |
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| Stage 3a |
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If you need to, create extra channels for flows and returns where required (especially approaching the manifold). The easiest way to do this is by using a hot blade cutter (available to buy from OMNIE). |
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| Stage 4 |
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Once the panels and pipe have been installed, the circuits should be hydraulically pressure tested. It is preferable for the pipe to be kept under pressure while the covering deck is laid. If this is not possible, the pressure test must be carried out for a second time once the covering deck has been installed. |
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| A Quick Guide to Filling the System |
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1. If the manifold is being used to pressure test all circuits at once, close both primary isolation valves. 2. Connect a pressure tester to any drain valve, vent the system of air and increase the pressure to 6 bar. 3. Once at this pressure, leave for 60 minutes. If the pressure has dropped examine the pipework. It may be necessary to pressure test individual circuits to determine if there has been damage to the pipe. 4. If the pressure is maintained and passes the test, record the results on the pressure test certificate. Have the test witnessed and certified by a third party. 5. Maintain this test pressure whilst the floor deck and finish are being laid. SEE MANIFOLD INSTALLATION GUIDE (DOCUMENT CODE: IG UFH 17) FOR FULL INSTRUCTIONS |
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| Notes on Floating Floors |
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The floor deck should be timber or timber composite with tongued and grooved edges. FoilFloat panels and plain insulation should butt tightly together with no gaps. Battens should be installed around room perimeters to support the floor deck and at access traps and in door thresholds. Insulation sheets should be laid so that joints are not co-incident with joints in the floor deck above. During the initial heat up, the mixing valve should be set to supply temperature of between 20°C and 25°C which needs to be maintained for at least 3 days. After this period, the flow temperature can then be increased to the design maximum and should be held for a further 4 days to complete the process. NOTE: Always refer to the flooring manufacturers instructions. |
