Использование таких элементов конструкции, как mixing units in the "warm floor" systems, as well as ventilation equipment, allows you to adjust the temperature of the air entering the room or water. When installing them, you should follow certain rules.
Why do we need a mixing unit for underfloor heating
This kind of equipment is used foradjust the temperature of the coolant mainly in private homes. "Warm floors" are usually connected to the boiler. Consequently, the water in the pipes laid under the screed, and water intended for domestic needs, have the same temperature. And this, of course, is not always convenient, especially in summer. Hot water is also needed at this time, but a heated overlapping surface will clearly be superfluous. In addition, in the absence of a mixing unit, the floors may be too hot even in winter.
What is a mixing unit
These components of the "warm floor" systems consist of the following elements:
- circulation pump
- control valve or valve
- check valve,
- ball valves
- balancing valve
- filter,
- temperature sensor.
Principle of operation
Обычно этот элемент системы отопления «теплый floor ”is placed on the supply pipe. In that case, if the water temperature exceeds the specified values, the valve will open and the already cooled coolant from the return line will start to flow into the line. As a result of mixing, the water temperature in the feed pipe will decrease.
For small houses, usually only usedone mixing unit. In the cottages and two-three-storey country buildings they install several. Depending on the principle of operation, these elements can be included in the system in parallel or in series.
Cost
Поскольку самостоятельная сборка этого элемента – the procedure is technically quite complicated, experts advise the owners of country houses to buy a ready-made mixing unit. The price of it, depending on the brand, the degree of equipment and performance, can vary approximately in the region of 7-15 thousand rubles.
How to choose
First of all, when choosing this equipmentshould look at the manufacturer's brand. Most likely, the Smex mixing unit, for example, with the ARA 659 servo drives, will work very well, for example, the latter are intended for proportional control of the coolant temperature.
Another popular brand is Valtec hubs. Their main advantage is the possibility of manual adjustment of floor heating.
Подбирается это оборудование также в зависимости on which boiler is used in the system, as well as on what kind of floor heating scheme itself is developed. When buying, you need to look first of all at the permissible water temperature, maximum and working pressure, as well as the pump head pressure, which should be equal to six meters.
How to install
In private homes, mixing nodes with a two-way valve are usually used. Install such equipment in the following order:
- Clamps are fastened to the wall opposite the pipe.
- The unit is attached simultaneously to the pressure and return pipe (through tees with thermometers and ball valve), as well as to the wall.
- Tees are connected bypass.
- A pressure pump is connected to the bypass.
- The ball valve on the supply line is connected to a short tee pipe and a flow meter.
- At the end of the last valve is installed stub.
- The bottom valve is also with a tee, closed valve.
- If necessary, connect the automated drives.
- The tees are connected to the bends of all heating circuits.
- Adjustable knot mix.
Of course, the installation of equipment will take placefaster if before the installation will be drawn scheme of a warm floor. The node can be located at any convenient point in the system. But it is better to cut it in any place where there is less chance of air bubbles getting into the coolant. You also need to make sure that the parts of the site, under stress, does not get water.
Rules of operation
When using the system "warm floor" inFirst of all, you should follow the recommendations of the manufacturer, set out in the instructions. Water temperature and pressure should not exceed the performance, and in extreme cases - the maximum allowable.
Use mixing knots evenequipped with filters, increases the requirements for the quality of the coolant. Water should not contain solid impurities. It is highly undesirable that chemically aggressive substances are also present. The assembly design may include vulnerable parts made of copper, plastic, zinc or rubber.
Mixing unit air handling unit
Конструкции этого типа используются в системах, equipped with water heat exchangers. Their main purpose is to maintain the temperature of the air entering the room at a level set by the owners.
Mixing units of this type work exactlythe same as the elements mounted in the "warm floor". The difference is that in this case, three-way valves are commonly used. The assembly is as follows:
- A filter is installed on the return pipe of the heat exchanger.
- Further the circulation pump joins.
- Mounted equipped with an electric valve.
- The valve is connected to the supply line bypass.
- On the return and supply pipe are installed ball valves and connected bypass. On the latter, a check valve and a control valve are installed in series.
- An automatic air vent cuts into the supply line.
- Service cranes are installed on the supply and return pipes.
As you can see, mount the mixing nodeair handling is quite difficult. And therefore it is better to entrust this work to specialists. If errors are made during the assembly process, the ventilation system may not work properly.
Operate the mixing ventilating units also according to the recommendations of the manufacturer of this particular model. To monitor the quality of the coolant is also important in this case.
