manifold assembly

Manifold (mixing unit) for water underfloor

When the device water floor heating pipes laid considerable number - several segments, which are called contours. All of them get turned on the device, to distribute and collect the coolant - a collector for underfloor heating.

Warm water floor is characterized by a large number of pipe circuits and low temperature heat medium circulating therein. Basically coolant required heating to 35-40 ° C. Only boilers, which are able to operate in this mode - condensing gas. But they rarely set. All other types of boilers outputs the bole hot water. However, with its contour in such temperature can not run - too hot floor is uncomfortable. To reduce the temperature and mix with necessary components. They, in certain proportions, mixed with the hot water supply and return pipeline of ostyvshaya. Then, through the manifold for floor heating, it is supplied to the circuit.

Manifold for floor heating with a mixing unit and a circulation pump

To all water circuit acted same temperature, it is supplied to the comb underfloor - a device with one input and a certain number of outputs. Such comb collects chilled water from the circuit, from where it enters the boiler input (and partly goes to mix with the node). This device - a comb flow and return - also called collector for underfloor heating. He can go to the node mix with, and maybe - just comb without any additional "burden".

Manifold for underfloor heating are made of three materials:

  • Of stainless steel. Most durable and expensive.
  • Brass. Average price category. When using high-quality alloy are very long.
  • Polypropylene. The cheapest. For work with low temperatures (as in this case) polypropylene - good budget solution.

Manifold for underfloor heating circuits 6

Installation for feeding comb collector connected input circuits underfloor, to the return line comb - outputs loops. They are connected in pairs - it was easier to adjust.

When water floor heating device is recommended to make all the circuit of the same length. It is necessary to heat each loop is the same. The only pity is that this ideal is uncommon. differences in length are much more likely to have, and substantial.

To equalize heat all circuits in the feeding comb flowmeters put on the back comb - adjusting valves. Flowmeters - a device with a clear plastic lid with the applied grading. The plastic housing is a float, which marks the speed at which coolant moves in the loop.

It is clear that the smaller coolant passes, the cooler the room. To adjust the temperature change rate at each circuit. With this configuration the collector for underfloor heating do it manually using the control valves mounted on the back of a comb.

Consumption change respective rotation knob (pictured above are white). Make it easier to navigate, the installation of the collector node, all the circuits, it is desirable to sign.

Flowmeters (right) and servo / servos (left)

This version is not bad, but adjust the flow rate, and hence the temperature of the accounts manually. It is not always convenient. To automate the adjustment of the inputs are set servos. They work in tandem with room thermostats. Depending on the situation, to the actuator is commanded to close or open the flow. In this manner maintain the desired automated temperature.

Mixer assembly for floor heating may be based on two-way and three-way valve. If the heating system is mixed - with radiators and under-floor heating, the node is still present and a circulation pump. Even if the boiler has its tsirkulyatsionnik, all loops warm floor "selling" it can not. Therefore becoming the second. And the one on the boiler runs on radiators. In such case the group is sometimes called pump-mixing unit.

Three-way valve - a device that mixes the two water flow. In this case - it is heated by the water supply and a cold water from the return line.

The operating principle of the three-way valve

Inside this valve regulating a movable sector, which regulates the rate of flow of colder water. This sector can be controlled by a thermostat, a manual or electronic thermostat.

Scheme mixing unit the three-way valve is simple: the valve connects the outputs hot water supply and return pipes, as well as an output that goes to feed comb collector for floor heating. After a three-way valve is installed a pump that "pushes" the water in the direction of flow of the comb (the direction is important!). A little further pump installed temperature sensor from a thermal head, mounted on the three-way valve.

Scheme mixing group for the warm water on the floor three-way valve

Everything works like this:

  • From the boiler enters the hot water. At first, it is skipped without mix with valve.
  • The temperature sensor transmits the information on the valve that a hot water (above the set temperature). The three-way valve opens mix with water from the return line.
  • In this state the system operates as long as the water temperature reaches the preset parameters.
  • The three-way valve shuts off the cold water.
  • In this state, the system operates until the water is too hot. Next reopened podmes.

the algorithm simple and intuitive. But this scheme has a significant drawback - there is the possibility that in case of failures in the heating surface will be fed directly to the hot water, no mix with. Since pipes Heated floor laid essentially of polymers with prolonged exposure to high temperatures they may collapse. Unfortunately, this flaw in this scheme is not eliminated.

Note that in the above diagram is drawn in green jumper - bypass. It is necessary to exclude the possibility of the boiler without the expense. This situation may occur when all shut-off valves on the manifold for underfloor heating will be closed. That is a situation where the coolant flow rate will not be at all. In this case, if the bypass circuit is not present, the boiler can overheat (overheat even sure) and burn. In the presence of water with a bypass flow through the jumper (made pipe, the diameter of which is less than a step backbone) will be supplied to the boiler inlet. Overheating does not happen, it will work in normal mode as long as no expense will be (do not go down the temperature in one or more circuits).

Two-way valve is placed on the supply from the boiler. On bridge between supply and return conduit installed balancing valve. This device is adjustable, it is adjusted depending on the desired flow temperature (usually regulated Allen key). It determines the supply amount of cold water.

Two-way valve must be installed with a controlled temperature sensor. As in the previous scheme, the sensor is placed after the pump and the pump drives the fluid into the side of the comb. Only in this case changes the flow rate of hot water from the boiler. Accordingly, changing the feed water temperature at the pump inlet (stream of cold set and is stable).

Scheme mixing unit on the basis of two-way valve

As you can see, mix with cold water in such a scheme is always, so that in this scheme the ingress of water in the circuit directly from the boiler is not possible. That is, the scheme can be called more reliable. But mixing group on two-way valve can provide heating only 150-200 square meters of warm water floor - no valves with higher performance.

And two-way and three-way valve is characterized by bandwidth or capacity. This value showing the amount of coolant that it is able to skip through themselves per unit time. Most often expressed in liters per minute (l / min) or in cubic meters per hour (m3 / h).

In general, when designing a system, it is required to make a payment - to determine the capacity of the heating surface, take into account the hydraulic resistance, etc. But if the collector for underfloor heating is going with his own hands, the calculations do very rarely. Often based on experience, and they are as follows:

  • valve with a flow rate of 2 m 3 / h are required to provide approximately 50-100 sqm floor heating (100 squares - a stretch with good heat insulation).
  • if performance (sometimes denoted as a KVS) 2 m 3 / hr to 4 m 3 / h, their fashionable put on systems in which the underfloor area of ​​not more than 200 squares;
  • for areas of more than 200 m2 is needed capacity of more than 4 m 3 / h, but most do mix with two nodes - it turns easier.

The materials of which make the valve - two-way and three-way - brass and stainless steel. When choosing these elements is to take only the genuine and proven - of their work depends on the work of the entire floor heating. There are three clear leaders in quality: Oventrop, Esbi, Danfoss.

There is another option for which you should choose - limits the flow temperature adjustment. The performance is usually specified plug - minimum and maximum temperature. If you live in the middle zone, or south, in the off-season comfortable indoor temperature is maintained if the lower limit of adjustment of 30 ° C or less (at 35 ° C already hot). In this case, the adjustment limits may look like this: 30-55 ° C. For more northerly regions or poor insulation floor taken to limit adjustment of 35 degrees.

Manifold for underfloor heating with their own hands

Last editing: 21.10.2015

Author: Maxim Bezuh

For the installation of water sex is important to observe all the subtleties. Each circuit must be equipped with all necessary. And one of the important parts of the water floor system is a collector. If you buy a ready-collector, it is certainly the easiest option. However, you will need to prepare about 20 thousand rubles. If you want to save, then collect collector for underfloor heating with their own hands. In this article you will learn how to do it.

The collector has a role in mixing and distribution of warm water for several heating circuits in parallel. The large cross section and low speed promote effective mixing of warm and hot heat carrier, stabilizing temperature.

Wiring diagram is very simple. When the coolant passes through the loop, it is returned to the manifold and is mixed with the warm coolant. To adjust the ratio of hot and warm water are installed special valves. Also, the pressure sensor is mounted and heat for accurate temperature control. No installation costs and without the circulation pump, which increases the pressure in the system.

The following example will help you understand the purpose for which it is necessary to build a collector for underfloor heating:

Example: In your house the boiler. From it implemented wiring for heating radiators. For these reasons require a coolant having a temperature of from 75 ° C to 95 ° C. You also plan to install a warm floor. For him, the coolant should be at a temperature from 35 ° C to 55 ° C. The floor should have a maximum temperature of 30 ° C. Otherwise flooring will be spoiled. That's just in such a situation can not do without the collector. Indeed, in the floor heating circuit necessary to direct the coolant with a lower temperature than the battery. Moreover, because of the greater length of the tubes in the heat field must increase the pressure further. For this purpose, the collector pump is mounted.

Neutral collector for underfloor heating consists of the following major elements:

  • Three-way or two-way valve.
  • circulation pump.
  • Shut-off and balancing valves.
  • Two collectors.
  • Thermal head equipped with a temperature sensor.
  • To gauge pressure adjustment.
  • Duct. It is used to remove air.

The package also includes a collector nipples, fittings, tees and other elements that play an important role.

The structure of the two-way and three-way valve

Two-way valve has a lower bandwidth. For this reason, the coolant supply is without jumps and smoothly. This embodiment is ideal for home is not more than 200 m 2.

Note! Sooner or later, the valve may be damaged. So it was easy to replace, it is recommended to install an American.

Thus, the two-way valve operates in the following way:

  • Thermal head. It will control the temperature of the coolant, which enters the circuit.
  • When reaching a high temperature valve opens. After that hot water is not supplied.
  • Once the water cools down, opened the inning with a hot coolant.
  • Of the return water flows continuously. Hot, comes only in those cases when it is necessary.

With regard to the three-way valve, it is considered to be universal. As a rule, it is used in complex systems. If you have planned a lot of contours, the three-way valve is the optimal solution. However, it has an obvious flaw, which lies in the sharp fluctuations in temperature. The circuit can be supplied with hot heat transfer fluid erroneous data on the thermostat. The three-way valve features a large measure of bandwidth.

Note! Often, such a system additionally mounted actuators. They are controlled by sensors outside temperature or weather sensor.

The three-way valve operates as follows:

  • This device simultaneously controls the water supply from boiler return flow and the bypass line.
  • Inside this device is the mixing of hot water with warm.
  • Located inside the flap is in a perpendicular position with respect to the return pipe and supply pipe.
  • When adjustment can change the amount of coolant flow and temperature level.

If you want to temperature control was carried out in automatic mode, which reacts to the weather, additionally installed weather sensors. Although the adjustment can be done manually, but it is extremely difficult to accurately set the correct flow ratio. For this reason, and this element is mounted. Some models have the function of weather sensors to lower feed consumption during your absence. But such a device will be more expensive.

The collector also includes other essential elements, for example, an exhaust valve, a temperature sensor, and other elements. Each of them has an important function. When assembling the scheme should be guided.

So, we have learned from you about what to do manifold for underfloor heating of the forces of each.

How to assemble a homemade mixing unit, see below:

Copyright © 2018 Paul with his own hands. Partial or complete copying of materials is allowed only with a direct active link.

The information published on the website is of familiarization character.

Connect underfloor heating manifold

System warm water floor - only operate smoothly and more effective alternative to traditional heating. Underfloor heating can also be used as a supplement to the usual way, for example, for one or more rooms. Its advantage is that the system always operates autonomously and the main heating circuit is independent. Such autonomy provides a collector for underfloor heating with their own hands, working as a multifunction device. What is multitasking collector "warm floor" system?

Manifold for floor heating system

First of all, we analyze the concept of "warm floor". This independent heating system, is connected to the main heating ring. That the connection has been most effective in places docking was no heat loss, use the collector connection (in some cases - a few collectors, if the system has several heating circuits). The most primitive collector for warm water floor - a segment of heat-conducting tubes, which are outlets for connection to other heating pipes.

Scheme simple collector

That is, the collector - a coolant pipe distribution circuit that directs and controls the hot water flows through the pipes in the house heating. Standard connection underfloor manifold include an inlet header connected to coolant return pipe or the feed (depending on the heating circuit), the output devices are connected to the floor heating pipe system.

Primitive collector system for heating is used very rarely, because the more complex and more efficient units, commercially available in a large range, it is possible to pick up for anyone, even the most complex heating scheme. Modern collector - a technology design with many elements that guide and regulate the flow of coolant. The adjustment is required due to the fact that the boiler heat carrier heats up to 70 0 C, and sometimes up to 95 0 C, which is unacceptable for a warm floor - it is impossible to walk on such surface, and not every floor will stand high temperatures. Therefore, the installation of underfloor heating manifold necessarily needed - device evenly distributed temperature coolant flows, align it, and will monitor the performance of the heating system. The effective functioning of the reservoir is provided by the following elements in its composition:

  1. Combs: flow and return;
  2. Valves: two- or three-way;
  3. Circulation pump;
  4. Flow meters, pressure gauges and thermostats.

Manifold heating circuit

The standard collector circuit of floor heating (. See figure) works as follows: the comb are connected to each other and to a common manifold block. The coolant supply and return pipes are mixed in a mixer with simultaneous alignment and adjustment of the hot water temperature. The illustrated circuit - not the only, and the final assembly of the collector circuit depends on the number of heating circuits and their purpose. In any scheme to be applied mixing valves that will mix feed and return line. Tank line (cooled heating medium) is fed into the heating circuit manifold, the coolant supply is derived from the boiler.

To a two- or three-way combs connects circulation pump for heating. The entire circuit operates as follows: after reaching the set room temperature from the sensor signal supplied to the valves, which overlap for a certain time in the coolant supply pipe and the pump is stopped. After cooling the coolant to a predetermined point all going in reverse order.

Three-way mixing valve

Monitoring and Configuring the underfloor heating manifold occur manually or automatically. For automatic operation of the control unit must be installed or the servo. The control device includes a supply valve - two- or three-way. From conventional feed valves differ valve possibility coolant flowing in one direction. Install the valve need special attention - if you put the valve in the opposite direction, it quickly breaks down.

The locking element of the supply valve - a steel ball or a rod. By turning the handle valve opening overlap occurs, and turning itself can be carried out manually or by means of actuators that are connected to temperature sensors.

two-way valve

Two-way mixing valve allows fluid into one direction by adjusting the amount of hot fluid. Adjustment takes place smoothly and slowly due to the low capacity of the device capabilities.

Thus, installation of two-way valve with the reservoir provides a constant and comfortable throughout the entire coolant temperature floor heating pipe, and the smoothness of the temperature control device is provided by low throughput capacity. Two-way valves are easy to install and replace, they are reliable and durable. Their only drawback - is not recommended for heating systems that are designed for high warm area (≥ 200 m 2).

Scheme collector with a three-way valve

Three-way feed valve has a more complex and versatile device that combines in one housing a bypass and a bypass valve capabilities. A three-way valve of the collector housing has one outlet and two inlets, and the adjustment of the coolant in the same way as in the two-way device - or a steel ball or a rod. this valve difference is that neither the ball nor stem completely cover the flow of the coolant, and the construction itself is designed for redistribution and mixing of the return and supply. To automatically adjust the temperature in the embedded servo valve operating signals from temperature sensors and controllers. Servo controlled stop valve design providing the desired degree of flow mixing.

Three-way valve with actuator

Three-way valves are installed in the supply header nodes for a large area heated premises - ≥ 200 m 2 as well as in multiple-heating systems.

Manifold for floor heating system

Underfloor heating often mount a common collector node, or before each heating circuit is set a separate collector. If it is the last option, all collectors are fitted with flow meters, thermostats, as well as the following elements:

  1. The mixing valve and the return flow;
  2. Stopcock balancing heater;
  3. Overflow valve.

Most collect collector for underfloor heating can be under different schemes, and in some schemes collector assemblies used bypasses, but not always - only in the single-loop systems. If a system of warm floors is organized in two-loop, the collector can be enabled without bypass in the secondary circuit.

Dual-circuit system with floor heating manifold

Before you assemble the collector unit for underfloor heating, weigh the opportunities - sometimes it's easier to buy a ready-made design. If the collector will be bought, it is best to all its parts and elements are from the same manufacturer. With self-assembly assembly is necessary to select the material of which will be collected in the main assembly constituents: copper, steel, brass or polymers.

Also, when choosing the industrial design is important to consider the following options:

  1. How the system is heating circuits (generally from 2 to 12), the total length of piping and bandwidth circuits;
  2. The maximum allowable pressure in the pipes;
  3. Expandable heating system;
  4. Manual or automatic control of the collector;
  5. Electrical power all components and assemblies;
  6. The diameter of the internal manifold holes (throughput).

Collector with his own hands

The most efficient operation can be collected by the collector node to provide connection to them of equal length heating zones. With sufficient accuracy to equalize the length of the pipelines, they are divided into equal segments, which are connected to the collector. The easiest way to calculate the manifold assembly in a special computer program or an online calculator that does not appear the phenomenon called "thermal zebra", ie, non-uniform heating of the floor.

The following information is required for the calculation:

  1. Type decorative flooring;
  2. area of ​​heated space and the deployment plan in it for large items;
  3. The material and diameter of the pipes circuit;
  4. The nominal output of the boiler;
  5. Type of floor insulation.

Important: when installing floor heating pipes to avoid pipe joints - is prohibited by existing regulations. It should be remembered that the flow resistance of the coolant is increased at every turn of the pipeline and by increasing its length.

calculation of the collector

Installation of the collector - Recommendations

When designing a floor heating system, first you need to find the optimal location for mounting the collector. The standard unit is installed in the collector cabinet, and the cabinet is mounted at a height of 30-40 cm from the floor next to the flow and return.

In order not to narekat own mistakes and to ensure maximum heating underfloor heating pipes, read the instructions for connecting the collector. Then collect the next node in sequence (this applies to industrial collector unit):

  1. Extract the tube for the forward and reverse flow of coolant. Tubes must be with flow and feed valves. If multiple-collector, collect section into a single structure;
  2. Collected from the sections to assemble a node on the brackets (are included);
  3. Next install stop valves, automation, sensors and other connecting fittings;
  4. Assembly mounted to the wall or in a cabinet, assemble the thermostat, the actuator and the circulating pump;
  5. We connect the pipe from the boiler and pipes of the heating circuits of the system "warm floors".

set header

Now connect the underfloor heating manifold circuit is pressurized, then it is possible to pour the concrete floor. Thermal collector settings can be carried out after installation finish.

Manifold assembly with his own hands

Serial header - the product quite expensive, so many masters want to do with her hands. Many elements still have to buy, but the cost will be cheaper. The easiest way to self-made collector weld PVC pipes and fittings Ø 25-32 mm. Also need the tees and elbows of the same diameter, and check valves.

Important: homemade manifold assembly has a lot of joints, so all the solder must be carefully checked, and not only during assembly, but also during operation of underfloor heating.

homemade collector

The number of valves and fittings are calculated according to the number of heating circuits. Of the tools needed for soldering elements of propylene and attachment to it, special scissors for cutting tubes and roulette.

Partitioning collector is marking and cutting the desired length pipes, maintaining a minimum distance between tees. For PVC tees soldered soldering iron gates and passages. By this construction soldered fittings for connecting the pump. As you can see, everything is simple, but the more complex the collector nodes is better to buy ready-made.

Leave a Reply

Your email address will not be published. Required fields are marked *

82 + = 87