The efficient operation of underfloor heating systems is ensured by a balanced and reliable collector group. This is a distribution block that delimits the coolant supply circuits along the branches of the heating pipeline. Such nodes can have different configurations and technical characteristics, and in some modifications also perform auxiliary functions. Qualitatively installed collector groups for underfloor heating make it possible to achieve not only an optimized water supply, but also significant energy savings.
What is a collector group?
The design of the distribution group is formed by two plumbing flanges on which shut-off valves are located . In the simplest models, such blocks are formed by the supply and return manifolds with openings for controlling coolants. Mechanized structures provide equipment with handwheels with knobs for adjustment. More sophisticated modern versions also allow automated control of the supply and discharge of water. Extended equipment assumes that the collector group for the heated floor assembly can be equipped with shut-off valves with a thermometer, end nodes and metal brackets. Additional functionality is usually represented by flow meters that integrate into the circuits.
Specifications
The upper limit of the operating temperature is a distinctive indicator of collectors designed for operation in a warm floor system. So, in comparison with radiator distributors, such designs work with heat carriers at 40-50 ° . At the same time, flow control can vary from 0.5 to 6 l / min on average. An important characteristic is the pressure under which the collector groups for the warm floor function . The pump can correct this value in the range of 6-10 bar. As for the materials of manufacture, the metal base is made of stainless steel, and the fittings are most often made of brass. Also, structures may include plastic components represented by polypropylene. By the way, heating circuits of the warm floor are also made from the same material.
Installation configurations
The use of vertical and horizontal schemes is practiced, according to which the supply of coolant circuits is organized. The simplest configuration involves the use of a single-tube vertical wiring system - respectively, and the collector will be required in a minimum configuration. But such designs have many shortcomings, among which are possible violations in the distribution of heat and low accuracy of adjustment of the initial temperature regime. The two-pipe system includes full-format collector groups for underfloor heating, which are organized separately from central heating. Among the minuses of such structures, high water consumption and the complexity of installation operations are noted.
Installation work
Installation of the underfloor heating system begins precisely with the installation of the manifold cabinet, into which all distribution equipment is then placed. The placement of the module is already implemented in assembled form, after which the contours are connected to its nodes. The connection of the individual components is carried out in different ways depending on the type of collector itself. For example, branch pipes can be provided with threads or special weld outs. The outlet nozzles may already have pre-installed control and adjustment elements, including valves, taps, tuning valves, etc.
Contour materials also affect the technology by which the collector group for underfloor heating will be mounted. With your own hands, if necessary, you can also implement transition points from polypropylene outputs to metal. The threaded connection in this case is carried out by combined fittings with the supplied fittings. As an alternative, a polypropylene tee is also offered, which will also ensure the distribution of ducts. After completion of technical operations, the system should be checked for functionality. A test run is carried out with a high pressure indicator. Relative to the normative level, the pressure should be increased by 20-25%. This will allow you to check the tightness of the connection, to identify defects and design defects.
Collector management
Manifold blocks are initially shipped with a closed adjustment system. The valves can be opened by removing the thermowell; at the same time, the flowmeter must be rotated by the adjusting nut until it stops. At the same time, it is not recommended to use wrenches, since there is a risk of shear and fastening thread of the device. To set the desired flow rate, it is necessary to reduce the flow rate. As this action is completed, the flow meter should also rotate. When the optimum value is reached, you can put the valve sleeve back on. The balancing and adjustment of each circuit should be carried out periodically in accordance with the manufacturer's recommendations. The regularity of preventive measures depends on the configuration in which the underfloor heating is supplied. After some time of operation, the collector group also becomes clogged at the joints and junctions. Therefore, you should clean and rinse these areas.
Recommendations for using flowmeters
Correct operation of the flowmeter is possible only if the heat supply circuits are optimally configured in accordance with the needs of the user. Unused valves must be tightly closed. It is advisable to keep the cap from the flowmeter 5-7 mm below the normal closed position. It should also be noted that the collector groups for the warm floor can be supplemented by other measuring devices. Their integration can make its own adjustments to the flow rate, so you should make a correction for the inappropriate flow rate of the coolant.
Collector manufacturers
Valtec and Comisa are among the leaders in the market of sanitary equipment for heating systems. These manufacturers produce high-quality collectors assembled, complemented by all the necessary accessories. In particular, the Valtec underfloor heating collector group in the latest versions provides for the presence of EPDM rings, which eliminate the need for sealants at the joints. Budget solutions are offered by IPS and TIM. These are functional and reliable units, which are also suitable for most floor heating systems.
Conclusion
Against the background of the spread of automated control systems for engineering equipment parameters, the mechanics of the collectors may seem outdated. Even electric underfloor heating has a huge advantage in this regard. On the other hand, collector groups for underfloor heating differ in their advantages in the form of economy and the absence of the need for wiring. The advantages of collector control include a high degree of reliability. Manufacturers of combs and sanitary fittings are constantly improving the connection mechanisms, which ensures not only the durability of the structure, but also the rational flow of the coolant.