M2la24zs32 three-way valve DIY repair

In detail: m2la24zs32 three-way valve DIY repair from a real master for the site my.housecope.com.

Boiler Arderia ESR 2.16 pleased us with his trouble-free work for 3 years. And the other day, the household noticed a water leak from the unit. And it dripped normally, I even had to substitute the bucket.

I immediately remembered 2 observations that spoke of an imminent disaster:

the pressure in the system slowly dropped, it was necessary to top up once a week, two times;
the hot water tasted of rust.

Before calling the gas workers, I decided to try to figure out the topic myself. If the problem is not big - why bother busy people. Yes, and these busy people take for their services, traditionally, not weakly.

Disconnect the boiler from the 220 socket. Remove the front cover. There are no seals, no secrets, everything is in sight, 2 bolts.

Immediately I saw from where the trickle runs along the boiler body. We read the marking on the mechanism - m2la24zs32.

In the global network we find the name - Arderia 3-way valve (2040105).

There is a part on sale, it costs from 3300 to 4400 rubles. in different parts of the country. But there is interest in trying to fix it, if possible. A video with detailed instructions came across on YouTube. 10 minutes, and I'm a master, you can start.

Online help:

The three-way valve in boilers is designed to correctly redirect the heating medium (water). It is a branched adapter with a temperature sensor and an electric drive. It allows double-circuit boilers to quickly warm up liquid for heating systems and hot water supply. The valve is switched according to two main modes: heating the coolant, heating the service water. The principle of operation is as follows: in the first mode, the three-way valve blocks the access of the heat carrier to the second heat exchanger (for heating domestic water), in the second mode, the valve opens the access of hot water from the heating system to the second heat exchanger (the circulation of the heat carrier allows heating water to be supplied to the tap).

Video (click to play).

First of all, we disconnect from the heating and water supply network (we shut off all 4 taps from the bottom). We drain the water into the bucket through a special tube on the left, and a special tap-valve.

Then we remove the locking valves from all the tubular connections of the problem unit. As well as wires. We are trying to pull out the valve. Carefully! water will pour out of the freed pipes again - we catch it with a bucket and rags.

My valve did not want to go out on its own, I had to remove the heated water supply unit on the left with it. Fortunately, that is attached with only one bolt to the heat exchanger.

Wiggle, shake, pull out. I do not recommend using a lot of force.

We take the ill-fated three-way valve and settle down at the table, even a kitchen one, like me. It is extremely inconvenient to repair it on the weight and on the knee.

We unscrew the screws, remove the engine, it is unnecessary to disconnect the wires from the terminals:

Remove the plastic wheel from this side of the 3-way valve. He is not allowed contacts. We take out one, with a red wire, the second (double) - we do not completely take out:

We take out the wheel. We remove the cotter pin and the washer along them. Now you can unscrew the 4 screws on the other side of the valve:

And pull out this engineering marvel:

The rubber ball rotates with a motor and switches the flow of water in the pipes - heating or hot water supply. Essentially, it plugs up the holes.

The photo shows the wear of the ball (the surface has become rough), and the silicone rings:

I didn't rush to the store to look for O-rings, took off the dimensions, I'll look for it on occasion.

Image - M2la24zs32 three-way valve DIY repair

Online help:

The main and practically the only reason for the breakdown of a three-way valve is its strong contamination. Constant switching of water flows can lead to deposits of formations on the inner walls of the distributor.The action of a low-quality liquid with numerous additives can even affect a new element of the heating and heating system. Another factor (to which single valves are being modified) is simple wear due to long-term operation.

For the repair, I used FUM tape, cut into thin strips and wound on the seats of the oil seal rings. Naturally, winding such a trifle is not easy neatly, but it is possible.

Result. Hopefully not a lot and not a little rewound ribbons.

That's the whole repair. You can collect everything back. It is more convenient to install everything in the boiler also in tandem with plastic pipes from the hot water supply:

For ease of assembly, photographing of the process helps. Sometimes I had to flip through photos on my phone and check myself.

I poured water into the boiler, there is no leak. Started up the heating - bingo! Works and does not drip.

On the Internet, they write that the reason for the failure of this node is dirty water. I cannot agree with this, I think the reason is a lack of design. The rubber ball should press quite hard against the holes, the axle with silicone (or rubber) rings is under heavy stress. Those. the work on the rings is not only to retain water, but also to play the role of a bearing.

I'll see how long my repair will last. I will look for rings for repair. And hopefully the valve is always on sale.

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What is the valve stroke in the three-way valve of the Vaillant Atmo Pro VUW240-3 boiler, how is it completely disassembled.

Which Vaillant Atmo Pro VUW240-3 model are you talking about? series MAX or Tes?

Boiler series Atmomax Pro VUW 240-3 Thank you for your feedback.

jager If the three-way wedges in this series, then change it without even thinking.

Thank you, but I do not have such an opportunity. The nearest service is -130 km. If you have experience in disassembling and repairing a crane, be so kind and share. Thank you in advance.

Good day, uv. experts tell me please, there was a problem, in the summer when the heating is off, when the hot water supply is turned on, part of the water goes to the batteries.
I completely cleaned the three-way, the drive works, the stem pulls back and forth, everything works, went through the entire valve body, everything is in order, but when working on hot water, the water pushes to a small and large circle, especially after the tap is closed. THX.

turn off the supply tap for the summer

That is exactly what he did, but this is not an option, the most interesting thing is that in these models the hydroelectric system is made in such a way that in any case, part of the hot water goes to heating.
Apparently, the drive of the three-way valve does not reach the stop of the stem, probably the matter is in the drive, I will take a new drive from ours and try

Drive: plastic, and the worm is steel!
Development and results are in progress.
Either it doesn't close, or it doesn't work at all! But at the same time it does something!
You need to make a nut and a screw from the same materials!
It's a time bomb! Laid down by the much-hyped Wyllant.

jagerIf the three-way wedges in this series, then change it without even thinking.

I personally disassembled a month ago the three-way wedge of this boiler and removed this wedge - it stuck on the rubber barrel itself - in this valve it was still spherical - of the old type - it was decided by turning this sphere in diameter. The valve then works without problems. The instructions even say that in the new three-way, instead of a spherical barrel, a cylindrical barrel is used to reduce resistance to movement. This is exactly what I was doing - turning the sphere into a cylinder! Until it became free to walk! Perhaps the rubber has swollen in 10 years! The boiler was in 2004! After 10 years, this problem with the valve began. So I saved the owners UAH 1,500. Although before that the previous master simply replaced the broken three-way servo! But the valve never worked properly!

It is convenient to grind without pulling the rubber barrel from the body with a tool such as a dental drill - an engraver.

Official BAXI Forum in Russia

Message Shestov Yuri »05 Dec 2016, 19:52

Message BAXI-Ural »05 Dec 2016, 20:36

Message Shestov Yuri »06 Dec 2016, 18:25

He threw the terminal block away from the motor, the heating works smoothly, when it hooked up and opened the hot water tap back, the boiler hummed again and the heating temperature climbed up, as if when hot water was opened, the three-way tap closes the heating circulation, I close the hot water and the heating temperature drops, the boiler turns on for heating the heating, and sometimes after closing the hot water tap, the heating temperature remains at 65 degrees and does not drop. Naturally, the boiler freezes, the batteries cool down, and the temperature in the boiler does not drop, therefore it does not turn on. I thought maybe it's the brain or is it in the motor? Where can you get it in the Chelyabinsk region and how to check your motor for malfunction?

If heating or hot water supply does not work in a wall-mounted gas boiler, then there is a high probability of failure of the three-way tap. All work on the repair of gas equipment must be carried out by specialized organizations that have a license. Self-repair of the gas boiler is prohibited. If the three-way valve fails, it is recommended to call a specialist to replace it. But the old three-way valve can be repaired by yourself and left as a backup.

A three-way valve serves to redirect the flow of water. When the hot water supply tap opens, the heated water flows through it into the mixer. And when the tap is closed, the water is redirected through the heat exchanger to the heating system.

In the article, using the example of a malfunction of the three-way valve of the Navien gas boiler, we will describe possible breakdowns of the three-way valve, methods of checking for subsequent repair. A crane costs from 3 to 5 thousand rubles, depending on the region, and spare parts for repairs are ten times cheaper (except for the engine). Readers are given the opportunity not only to learn about the device of this part, but also to try their hand at repair. After all, except for a Phillips screwdriver, a tester and a soldering iron, nothing is required. The most important thing is care, accuracy and observe electrical safety measures, since the motor of the three-way crane is powered by an alternating voltage of 220 V.

So, we have a non-working three-way valve for the Navien gas boiler, which was successfully replaced by a new valve by specialists.

It can be seen that the inside is covered with rust. This happens when an additional filter for water purification has not been installed in the system, and its quality is poor. At a minimum, the tap will have to be disassembled and completely cleaned. But first things first.

First, unscrew the four screws on the valve body using a regular Phillips screwdriver.

Three-way valve of the navien boiler with an electric drive - remove the engine.

We disassemble the case in half. In the case, we see two microswitches. We check them with a multimeter. In the normal position, they are closed, and when pressed, they open. The appearance, position and dimensions of the switches may differ depending on the modification of the crane. If one of the microswitches is defective, replace them with a soldering iron. Sometimes, to determine if one of the switches is faulty, you may not need a multimeter. Often the malfunction is visible visually, the button sinks in one position, does not work clearly.

Checking the microswitches of a three-way motorized valve.

To check the motor, unscrew two more screws. The three-way valve can now be completely disassembled.

Disassembled three-way valve.

Having disconnected the wires, we take out the engine for checking.

Photo of a three-way crane motor.

Before checking the motor, check the resistance between the terminals. It should be about 15 kOhm. If the resistance is measured in Ohms or infinite, then immediately replace the engine, as it burned out. This happens due to the ingress of water inside it. If the resistance is normal, then power the motor with an alternating voltage of 220V.

Attention, observe safety measures during work. There is a risk of electric shock.

If the motor is spinning (very slowly, 3 rpm), then it is serviceable. If not, then you can disassemble it. Remove the cover after pressing the four latches. Inside, in addition to the engine, a gearbox is assembled. If, when removing the gears, the motor does not work, then replace the motor assembly. And if it works, then carefully examine the plastic gears, perhaps one of them is damaged.

With any repair of a three-way valve, it is necessary to carry out preventive cleaning from rust and replace all O-rings to be sure of its correct operation. After cleaning, the valve is assembled in reverse order.

Navien boiler three-way valve, assy.

After assembling the valve, be sure to re-energize the motor. Visually see that the stem moves. Otherwise, repeat the entire check procedure again.

Today we'll talk about long-burning solid fuel boilers, pyrolysis and pellet boilers, let's try to figure out if they are so good. What is it.

The article provides information on the causes of the malfunction, methods of determining the breakdown and repair of the tube with the turbocharged condensate collector.

Requirements for the room in which the gas boiler will be installed. What should be the boiler room? Questions of ceiling height, volume.

What kind of ignition options are provided in modern boiler equipment? Detailed consideration of piezo ignition and electric ignition. Which option is more.

The question often arises of how to heat a greenhouse, garage or other outbuildings. If it is not possible, connect to the city boiler room, then.

It may be that the issue has already been resolved in similar topics

We continue to heal childhood diseases of the turbocharged boiler ariston uno 24.
This time the yellow chimney light came on. Since the breakdown happened at night, it became cool in the apartment until the morning.
Symptoms: the boiler turned on, the chimney turbine tried to start, then it tried again and the boiler went into error mode.

An autopsy showed that the fan relay "blinks". It has a special round hole filled with transparent polymer. When the fan starts up, a blue glow is visible in this window.

In the second photo, the arrow indicated on which relay the glow was visible.
The relay was wiped out, swapped with the circulation pump relay (lower relay). And it was checked, the pump did not work, the fan turned on.

It was too lazy to run to the store, so I opened the relay, cleaned it and installed it in the place of the circulation pump (it switches least of all).

The image shows where you need to open the relay, carefully open a third of the top of the case with a clerical knife (I gently squeezed the relay in a vice), while gently prying and bending the notched part.
This part covers the compartment with contacts (I unknowingly opened the whole inch, the second compartment contains the coil and the retractor).
I analyzed the condition of the contacts, cleaned it up with a piece of paper and slightly bent the extreme burnt contact, reducing the switching gap.
After cleaning, I sealed the case with transparent tape, but probably better with non-burning electrical tape.

Later I'll go get a suitable relay, and then I'll see how long it will last.

In a wide range of valves used for heating systems, there is an element that is rarely used. Its shape resembles a tee, although the functions it performs are completely different. We are talking about a three-way valve, the principle of which will be discussed in this article.

Three-way valve working principle

What is this device, what is it for?

The three-way valve is mounted on those sections of the highways where it is required to divide the flow of the circulating fluid into 2 circuits:

with variable hydraulic mode;
with constant.

In most cases, a constant flow is required for those who are supplied with high quality fluid and in the indicated volumes. It is regulated in accordance with the quality indicators.As for the variable flow, it is used for facilities where quality indicators are not basic. There, the quantity ratio is of great importance. Simply put, the supply of the coolant there is carried out according to the required amount.

Note! An analogue of the device described in the article, a two-way valve, also belongs to the shut-off valves. How is it different? The fact is that the three-way option works according to a completely different principle. The stem, which is part of its design, is unable to block the flow of fluid, which has constant hydraulic performance.

The stem is open all the time, it is adjusted to a particular volume of liquid. Consequently, users will be able to get the volume they need, both in terms of quantity and quality. In general, this device is unable to shut off the fluid supply to a network in which the hydraulic flow is constant. In this case, the flow of a variable type, it can well shut off, due to which, in fact, it becomes possible to adjust the flow / pressure.

And if you connect a pair of two-way type devices, you can get one, but three-way. But it is necessary that both work in reverse, in other words, when one valve is closed, the next one should open.

Without prolonged injections, we note that the device can be of two types according to the principle of operation. It can be:The features of the action of each type are clear already from their name. The mixing device consists of two outlets and an inlet. In other words, it is necessary for mixing liquid streams, which may be required in order to lower its temperature. By the way, this is the most optimal option in order to set the desired mode in the "warm floor".The very procedure for adjusting the temperature regime is extremely simple. You just need to know about the current temperature readings of the incoming fluid flows, accurately calculate the required proportions of each of them so as to obtain the required indicators at the output. By the way, this device, subject to proper installation and adjustment, is able to function and split the flow.But the split valve divides one flow in two, therefore, it is equipped with one inlet and two outlets. This device is mainly used to divide the flow of hot water in DHW systems. Although quite often it is found in the piping of air heaters.Outwardly, both options are almost identical. But if you look at their sectional drawing, then their main difference can be seen immediately. The stem, which is installed in the mixing-type device, has one ball valve. It is centered and overlaps the main passage.As for the separating devices, the stem in them has two such valves, which are installed at the outputs. They function according to the following principle: one of them is pressed against the seat, closing the passage, and the other, in parallel with this, opens passage No. 2.According to the control method, modern models can be:In most cases, a hand-held device is used, which outwardly resembles an ordinary ball valve, but is equipped with three outlet pipes. But electrical models with automatic control are used mainly in private houses, namely, in order to distribute heat. For example, the user can adjust the temperature regime by room, and the working fluid will flow in accordance with the distance between the room and the heater. Alternatively, you can combine it with a "warm floor".

Article 61302483-01
The price is 4,000 rubles.

-If the cartridge ran and filled the motor, then you need to buy both the cartridge and the three-way valve motor, namely:
Article 60001583
Three-way valve of the gas boiler Ariston ASSEMBLY.

The price is 6,000 rubles.
Includes both a motor (servo drive) and a three-way valve cartridge for the Ariston boiler.

TO BUY THREE-WAY VALVE HERE:

Best regards, BAKSI PROFI
Chelyabinsk
t. 8 912 478 72 69
T. 8 951 489 52 13

Home / Spare parts for gas boilers / Spare parts for foreign boilers / Spare parts for gas boilers Arderia / Three-way valve Arderia ESR 2.13-2.35 (m2la24zs32, 2040105) - 4000 rubles.

Three-way valve Arderia ESR 2.13-2.35 (m2la24zs32) art. 2040105, 2201100-16.

The three-way valve in boilers is designed to correctly redirect the heating medium (water). It is a branched adapter with a temperature sensor and an electric drive.It allows double-circuit boilers to quickly warm up liquid for heating systems and hot water supply. The valve is switched according to two main modes: heating the coolant, heating the service water. The principle of operation is as follows: in the first mode, the three-way valve blocks the access of the heat carrier to the second heat exchanger (for heating domestic water), in the second mode, the valve opens the access of hot water from the heating system to the second heat exchanger (the circulation of the heat carrier allows heating water to be supplied to the tap).

The main and practically the only reason for the breakdown of a three-way valve is its strong contamination. Constant switching of water flows can lead to deposits of formations on the inner walls of the distributor. The action of a low-quality liquid with numerous additives can even affect a new element of the heating and heating system. Another factor (to which single valves are being modified) is simple wear due to long-term operation.

Arderia ESR 2.13
Arderia ESR 2.16
Arderia ESR 2.20
Arderia ESR 2.25
Arderia ESR 2.30
Arderia ESR 2.35

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Express delivery to any city in Russia 1-3 daysin more detail.
Delivery by Russian Post to settlements, villages, villages
Dispatch on the day of order
Payment by credit card without commission
Payment upon receipt

Part number: 2040105 (M2LA24ZS32)
English name: 3 Way Motor
Three-way valve for wall-mounted gas double-circuit boilers ARDERIA (ARDERIA) models:

Arderia ESR 2.13 FFCD
Arderia ESR 2.16 FFCD
Arderia ESR 2.20 FFCD
Arderia ESR 2.25 FFCD
Arderia ESR 2.30 FFCD
Arderia ESR 2.35 FFCD

Material: main body - 66 G / F 30% nylon.
Purpose: the three-way valve is used to switch the heating medium flow from the heating circuit to the DHW (hot water supply) preparation circuit.
Country of origin: South Korea.

Sending on the day of order by any transport company convenient for you or by Russian Post.
We work with companies: CDEK, Russian Post, Business Lines, PEK, Energia, KIT, Ratek Hotline: 8-800-100-21-58 - daily from 8:00 to 22:00 (free calls within Russia) Image - M2la24zs32 three-way valve DIY repair

In modern heating systems, the three-way valve is used quite often, since it is a means of high-quality regulation of the coolant - by temperature, and not by flow. After all, supplying optimally heated water to the radiators is the best way to save energy. Thermal mixing taps have other useful functions, which you can learn about from this article.

But first you need to consider how the three-way valve works, as well as understand its internal structure.

At first, it should be noted that three-way thermostatic valves are divided into several types according to the principle of operation:

mixing;
dividing;
switching.

The purpose of each of the three types of devices can be judged by the name. The first mix two streams of coolant with different temperatures, the second separate, and the third are engaged in switching water in different directions. Outwardly, it is not difficult to recognize each variety, usually the principle of operation is depicted on the body in the form of a picture. This is what a three-way mixing valve for heating looks like:

A similar designation appears on the dividing element. As for the switching valves, there may not be an image on their body, but there are significant external differences in shape.

Isolation (left) and switching (right) valves

By mixing or splitting flows, the optimal temperature of the heating medium is achieved, which is used in various circuits of the heating system. Switching is used in gas double-circuit boilers, when the heated water must be alternately sent to different heat exchangers.

To understand what the three-way thermo-mixing valve of the most common saddle type consists of and how it works, you should study the diagram below. Inside the brass body with three nozzles, 3 chambers are arranged by casting, the passages between which are blocked by poppet valves. They are fixed on one axis - a rod coming out of the body from the fourth side.

The principle of operation is as follows: when the rod is pressed, the passage for one stream will begin to open and gradually close for another, as a result of which water of the required temperature will be obtained in the mixing chamber of the valve. It leaves the brass body of the element through a third port. Adjustment of the force of pressing the rod is carried out by a thermal head with an external temperature sensor installed in accordance with the diagram.

The whole process is worth explaining in more detail. Imagine that an insufficiently heated heat carrier enters from the hot water side. Then the mechanism passes it further, and the third pipe is closed. The remote sensor is filled with a temperature-sensitive liquid and is connected by means of a capillary tube to a reservoir (bellows) inside the thermal head.

When the sensor heats up, this liquid expands, its volume in the tube and the bellows increases, as a result, the latter begins to press on the stem of the three-way valve. The moment of pressing is determined by the adjustment on the scale of the thermostatic head, set to the required temperature. After that, cold water is added to the flow of heated water from the third branch pipe and the temperature of the water at the outlet of the thermo-valve remains unchanged, although at the inlet the coolant continues to heat up.

If the incoming water continues to heat up, the thermostatic valve can completely close the inlet and open the side flow to maintain the set outlet temperature. In this case, the stem is lowered to the lowest position. As soon as the sensor marks the cooling of the coolant, the head will slightly release the stem, the valve seat on the hot side will open and the heated water will begin to mix.

The method of adjusting a three-way valve with a thermostatic head with a sensor is the most popular, since it is quite accurate and simple, and does not require electricity.

If we are talking about a separating valve, the principle of its operation is practically the same, only when the stem is pressed, one flow begins to be divided into two. But in the switching element, the direction of movement is changed by the electric drive, which is described in detail in the video:

In addition to the thermostatic head, the valve can be controlled in other ways. The first of them is manual, when the depth of pressing the rod is determined by the rotation of the handle outside the body. Not the best option and is only suitable if the temperature of the water entering the pipes is unchanged. Another option is control by means of a servo and an electric drive that receives commands from the controller. To work together with different actuators, another type of valves is used - rotary, whose device is shown in the figure: Image - M2la24zs32 three-way valve DIY repair

Here there is a certain similarity with a ball valve, only the working swivel element has a different hole shape in order to let the coolant pass in two directions at once. The principle of operation here is simple: the axis is rotated to the required angle, rotated by the drive. The latter is controlled by a controller that receives pulses from one or more sensors. Typically, valve actuators are installed in complex or automated weather-controlled heating systems.

When there is an understanding of what a three-way valve is and what its work is, you can consider various connection schemes, depending on the purpose and role of the element in heating the house.Installation of a thermo-mixing valve is carried out in the following cases:

To protect the solid fuel boiler from the effects of condensation and temperature shock after sudden power outages.
The coolant in the underfloor heating circuits must be heated to no more than 45 ° C, which is provided by a mixing unit with a three-way valve.
To maintain the required temperature of the coolant in different places in the system.

In order to protect the solid fuel heating unit from condensation, it is impossible to allow cooled water from the radiator network to be supplied to the boiler tank during its warming up. For this, the following boiler connection diagram with a bypass and a three-way mixing valve is used:

The circuit works like this. Until the heat generator has warmed up, the water circulates in a small circle through the bypass. When the coolant in the return line heats up to 50-55 ° C, the valve begins to open and mixes in the cold coolant from the system. When the heater enters the operating mode, the bypass is closed and the entire flow goes through the radiators. This topic is covered in more detail in the video:

In the underfloor heating system, this element performs the same functions. The circulation pump drives the coolant along the heating circuits until it starts to cool down. As soon as this happens, the sensor and the thermal head will work, after which the three-way valve will add hot water from the boiler to the closed circuit. How to properly install the underfloor heating collector, pump and valve with your own hands is shown in the diagram: Image - M2la24zs32 three-way valve DIY repair

The next example of use and connection of this important part is the piping of a solid fuel heat generator and a buffer tank, which is a heat accumulator. To warm it up completely quickly enough, the temperature of the supplied coolant must be from 70 to 85 ° C, which is not at all needed in the radiator heating system. The three-way valve installed behind the tank together with a separate circulation pump helps to lower it.

Important. When installing the mixing valve, remember that the pump must be located on the side where the always open connection of the three-way valve is located.

The complex heating system of a large cottage can have many consumers connected by means of a hydraulic arrow and a distribution manifold. Moreover, in each of the circuits, it is necessary to supply a coolant with a different temperature. The highest is needed for an indirect heating boiler, therefore there are no control valves on the supply to it. The rest of the consumers need a colder coolant, and therefore they are connected through three-way valves.

In simple heating systems of country houses, receiving thermal energy from a TT-boiler, it is allowed to install a three-way valve of a simplified type, acting autonomously. For work, he does not need a thermal head with a temperature sensor, and there is no rod there either. The thermostatic control element is installed inside the housing and is set to a certain outlet water temperature, for example, 60 or 50 ° C (indicated on the housing).

The scheme of work and the device of the valve

A thermo-mixing valve of this type always maintains a fixed outlet temperature of the coolant; this setting cannot be changed. Hence, there is a plus and a minus in the use of such fittings:

The advantage is lower cost than the thermal head assembly. The difference is significant - about 30%.
Disadvantage - you cannot regulate the heating of the outgoing heat carrier. When the element from the factory is set to 55 ° C, it will always supply water at this temperature ± 2 ° C.

Advice. Before buying a valve of a simplified design, carefully read the technical documentation for a solid fuel boiler, it often indicates the minimum temperature of the return heat carrier.You can find more information on the use of such fittings here.

Video (click to play).

The thermostatic three-way valve is a very useful thing in the heating system of a private house, which allows you to effectively use the heated coolant, and therefore save fuel. In addition, this simple part plays the role of a safety element for solid fuel boilers and allows them to extend their service life. On the other hand, you should not put the valve unnecessarily and anywhere, always consult with a specialist in this field about this.

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