Esbe - three-way valve: instructions. Installation and adjustment of Esbe three-way valve
Three-way mixing valves (taps, valves) and actuators ESBE
Esbe three-way valves are usually used as mixing valves, but can be used as switching or separating valves. It is necessary to ensure that the pressure rating, pressure drop and leakage are within acceptable limits. This information given for each valve.
Four-way valves are usually used when a high return coolant temperature is required (usually for solid fuel boilers). In systems with two heat sources or a storage tank, valves will help prioritize the use of an inexpensive heat source while maintaining good temperature separation in the storage tank.
Operating principle of Esbe 3-way valves VRG130. The required temperature in the system is achieved by adding required quantities water coming from the return pipe supplied to the boiler.
Technical characteristics of three-way valves Esbe VRG131, internal thread
| vendor code | DN | Kvs | Compound | A mm | B mm | C mm | D mm | E mm | Weight kg |
| 11600100 | 15 | 0,4 | Rp 1/2" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11600200 | 15 | 0,63 | Rp 1/2" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11600300 | 15 | 1 | Rp 1/2" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11600400 | 15 | 1,6 | Rp 1/2" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11600500 | 15 | 2,5 | Rp 1/2" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11600600 | 15 | 4 | Rp 1/2" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11600700 | 20 | 2,5 | Rp 3/4" | 36 | 72 | 32 | 50 | 36 | 0,43 |
| 11600800 | 20 | 4 | Rp 3/4" | 36 | 72 | 32 | 50 | 36 | 0,43 |
| 11600900 | 20 | 6,3 | Rp 3/4" | 36 | 72 | 32 | 50 | 36 | 0,43 |
| 11601000 | 25 | 6,3 | Rp 1" | 41 | 82 | 34 | 52 | 41 | 0,7 |
| 11601100 | 25 | 10 | Rp 1" | 41 | 82 | 34 | 52 | 41 | 0,7 |
| 11601200 | 32 | 16 | Rp 1 1/4" | 47 | 94 | 37 | 55 | 47 | 0,95 |
| 11603400 | 40 | 25 | Rp 1 1/2" | 53 | 106 | 44 | 60 | 53 | 1,68 |
| 11603600 | 50 | 40 | Rp 2" | 60 | 120 | 46 | 64 | 60 | 2,3 |
Technical characteristics of three-way valves Esbe VRG132, external thread
| vendor code | DN | Kvs | Compound | A mm | B mm | C mm | D mm | E mm | Weight kg |
| 11601500 | 15 | 0,4 | G 3/4" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11601600 | 15 | 0,63 | G 3/4" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11601700 | 15 | 1 | G 3/4" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11601800 | 15 | 1,6 | G 3/4" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11601900 | 15 | 2,5 | G 3/4" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11602000 | 15 | 4 | G 3/4" | 36 | 72 | 32 | 50 | 36 | 0,4 |
| 11602100 | 20 | 2,5 | G 1" | 36 | 72 | 32 | 50 | 36 | 0,43 |
| 11602200 | 20 | 4 | G 1" | 36 | 72 | 32 | 50 | 36 | 0,43 |
| 11602300 | 20 | 6,3 | G 1" | 36 | 72 | 32 | 50 | 36 | 0,43 |
| 11602400 | 25 | 6,3 | G 1 1/4" | 41 | 82 | 34 | 52 | 41 | 0,7 |
| 11602500 | 25 | 10 | G 1 1/4" | 41 | 82 | 34 | 52 | 41 | 0,7 |
| 11602600 | 32 | 16 | G 1 1/2" | 47 | 94 | 37 | 55 | 47 | 0,95 |
| 11603500 | 40 | 25 | G 2" | 53 | 106 | 44 | 60 | 53 | 1,69 |
| 11603700 | 50 | 40 | G 2 1/4" | 60 | 120 | 46 | 64 | 60 | 2,3 |
How does Esbe three way valve work?
The required temperature in the heating system is ensured by proportionally adding colder coolant to the hotter coolant flow from the boiler.
How does a four way valve work?
Valves of this type have a double mixing function, that is, the hotter coolant is mixed with the colder coolant supplied to the boiler. This allows you to increase the temperature of the coolant in the return (returning to the boiler) and reduce the risk of low-temperature corrosion, which significantly extends the operating time of the boiler.
Installation examples and hydraulic characteristics of mixing valves Esbe series VRG and 3F
Esbe VRG
Esbe 3F
Operating principle of Esbe 3, 4, 5 way and bivalent mixing valves 
Advantages of Esbe mixing valves:
- Easy to install drives.
- Compact size, lightness and ease of installation - installation requires a minimum of tools.
- Minimum dimensions of mixing valves, facilitating installation in cramped conditions.
- Reliable installation of valve with internal thread. The key edges are wider and have two edges instead of six. This provides a better grip and less risk of the pipe wrench or box wrench slipping.
- More flexible cable connection. The drives are supplied complete with a connecting cable and an additional cable contact. The advantage is that you can run a separate cable, for example, directly to circulation pump without connecting through a central controller.
- High control accuracy.
- Minimum delay and high accuracy of the entire cycle, from complete closure Until the valve is fully opened, the valves provide the ability to use the full angle of rotation. This adjustment is as close to ideal as possible and provides increased comfort and reduced energy consumption.
- Esbe valves are renowned for their minimal internal leakage and have been awarded the " Best product plumbing equipment 2003".
- The leakage rate is reduced from 0.1 to 0.05%. And this is achieved at double pressure, i.e. at 100 kPa (1.0 bar). A valve that provides tighter closure is difficult to find and buy on the rotary valve market.
- Easy and convenient regulation, high performance
- Reliable and have a long service life
What is Kvs? Every mixing valve has the characteristic Kvs ( throughput m3/h at a pressure loss of 1 bar). The Kvs parameter helps determine which valve is needed for your heating system. Determine Kvs Esbe valve according to the schedule below.
Esbe mixing valve size selection
Selection of Esbe mixing valves of the VRG and VRB series for floor or radiator system heating.
We start from the thermal power of the boiler in kW (for example, 25 kW). We move vertically to the selected temperature mode t (for example, 15°C). Next, we move horizontally to the shaded area (pressure drop range 3-15 kPa) and select a lower value of the Kvs coefficient (for example, 4.0).
In this case we select desired type valve with coefficient Kvs=4.0
The Kvs value is taken for flow in one direction only
Valid for 4-way valves double meaning pressure drop P indicated on the graph.
Materials used, coolant requirements.
The VRG, VRB and 5MG series valves are manufactured from a special brass alloy (DZR Dezincification Resistant Brass, CW 602N), offering advantages that cannot be achieved in designs combining cast iron and brass. This allows them to be used for water supply systems with sanitary hot water.
Selective corrosion of brass(ordinary brass releases zinc, leaving a brittle, porous copper mass) is the most dangerous type of corrosion, leading to a rapid decrease in service life and loss of functionality. Coating the inner surface of valves and valves with a layer DZR reduces the likelihood of contaminants and sediment sticking to the valves, which ensures reduced wear and more clean water. The alloy also contains less lead than many other products. and is especially suitable for installation plumbing systems cold water supply.
All other ESBE valves can only be used in closed systems ah with water that does not contain dissolved oxygen.
To protect against freezing, it is allowed to use a coolant containing glycol and additives that neutralize dissolved oxygen, with a concentration of up to a maximum of 50%. When glycol is added to water, its viscosity increases and its heat capacity changes, so this must be taken into account when choosing a valve. If the percentage of glycol is 30-50%, then in this case it is necessary to select another valve with a higher Kv coefficient by one level. Lower glycol content does not affect the valve's operation.
Specialists of the company "Thermogorod" Moscow will help you choose, buy, and install ESBE fittings, will find an acceptable solution at a price. Ask any questions you are interested in, a telephone consultation is absolutely free, or use the form "Feedback"
You will be satisfied by cooperating with us!
A three-way valve in a water supply or heating system is responsible for mixing or separating liquids different temperatures, and also for obtaining the required temperature at the liquid outlet (adjusting the temperature of the coolant using a servo drive).
Design Features
The device body contains two inlets and one outlet for the flow of liquids and a control element, which can be different designs(for example, a rotary ball or a running rod), also a place for a servo drive.
Typically, the valve is not designed to completely shut off the output liquid flow, but is only capable of controlling the mixing proportions of liquids and the temperature in the system. The instructions do not suggest, but functionally, it is quite possible to shut off the liquid supply.
A three-way valve of a certain type, which performs separation functions, may have a rotary servo drive to redirect the flow to different pipes(then it is called “constipated”).
In this case, gradual or smooth mixing of liquids with temperature control does not occur, and the swivel mechanism consists of a ball (like a Bugatti ball valve).
There are several varieties of it, depending on the type of drive mechanism, performing the same functions:
- Hydraulic rotary drive;
- Pneumatic drive;
- Electric servo drive.
Yes, three A new Esbe valve with a servo drive will require the sample itself and a compatible drive manufactured by the same company.
Types and differences
Esbe has been in business for over a hundred years and specializes in temperature control products for hydraulic systems in small buildings.
It produces a valve and rotary servo actuator for cooling or heating systems, also working in conjunction with indoor and outdoor temperature sensors in the system. The operating principle of the Esbe three-way valve is similar to the above options.
The company produces several model series of three-way valves, including a mixing valve:
- Rotary valves (series models: VRG130, VRG330, 3F, H, VRH130, HG);
- Linear valves (series models: VLF300, VLF200, VLE132);
- Thermostatic mixing valve (series models: VTA and VTS).
Rotary valves
Valves of the VRG130 series are used for hot/cold water supply systems. This model range, like the subsequent ones, have various options(for example, a three-way valve from Esbe VRG 131 also belongs to this series and has a connection for a servo drive).
They are compact brass alloy mixing models designed to minimize leakage and with a manual adjustment dial. The instructions indicate that they are also compatible with systems automatic control and Esbe controllers that allow you to automate the operation of valves.
Esbe three-way valve of this model series - supplied with standard sizes DN 15-50, pressure class - PN 10, model options include varieties with internal (three-way mixing valve type Esbe model VRG131 with connection to an actuator), external thread
(model VRG132), with union nut or compression fittings.
Trekhodo howl mixing tap Esbe VRG330 series has similar qualities to the previously described VRG131 series (DN 20-50, PN 10), but is designed specifically to work with large flows (60 percent kvs difference between inputs).
Can also be equipped with compatible controllers and automatic control. Available with three types of connection: internal thread, external thread, rotating nut.
According to Esbe specifications, the 3F series rotary mixing valves are designed for use in heating and cooling systems.
Esbe controllers and automatic control systems can also be used with them ( three way valve Esbe model VRG131 with electric drive is not immediately supplied, which allows you to choose the most convenient option company products).
For ease of installation, the Esbe 3F three-way valve is marked with an adjustment scale on both sides. The valve body is made of cast iron, the model is also supplied with an adapter for a PN 6 flanged pipe, model sizes are DN25-150.
The mixing valve from Esbe series H (DN25-40) and HG (DN25) is designed for installation in limited space.
This three-way control valve from Esbe is only suitable for heating systems and is specified for work with the boiler group (made of cast iron, special “H”-shaped body). It also has a reasonable price.
As the main type of connection, both internal thread and its mixed type are used. Compatible with Esbe controllers and drives like VRG131.
Models of the VRH130 series are also made in the “H”-shaped version, but made of brass with a pressure class of PN 10. This model more versatile than the previous model and can also be used in water supply systems, available in different body widths.
Linear valves
The VLF300 series is a three-way linear mixing unit with standard sizes DN 15-50.
This model range is It is made of nodular cast iron and can be used with a working fluid such as cold/hot water or containing antifreeze components (glycol, for example).
In the latter case, the sample must be equipped with a rod heater. It is equipped with a flange for a PN 6 pipe. Models similar to those previously indicated, VLF200 dn25, are distinguished by a higher operating pressure of up to 16 bar (versus 6 bar for the previously indicated model range).
Models VLE132 – made of bronze with standard sizes DN 15-50. These are linear motorized valves, which, like the previously mentioned similar models, can use water with glycol as working fluids (connection - PN16 external thread), unlike the VRG131 series. Its price ranges from 140 to 350 euros.
All linear three-way valves listed are compatible with the Esbe controller and actuator.
Thermostatic mixing valve
VTS520/550 - the instructions indicate that three-way valves are designed to work with hot water supply systems that are connected to the system solar heating. Its price starts from 150 euros.
A special feature of this model range is that the Esbe three-way thermostatic valve comes with specialized protection against burns, since the liquid circulating in the system is sufficiently high temperature.
Esbe's three-way thermostatic mixing valve with "anti-scald" features a sensor that automatically turns off the servomotor for flow hot water, If cold water not served.
The coolant with which these models work is water (including drinking water), the coolant of closed systems is water with non-freezing components. Pressure class - PN 10, the body is made of brass, resistant to corrosion, for example, the VRG131 valve is not suitable for such a system.
VTA330/530 - Esbe thermostatic mixing valve of this series is designed for use in domestic hot water systems, as well as in taps or showers where no other means of temperature control is provided (VTA330), or in high-flow domestic hot water systems (VTA530). Its price is around 150 euros.
Also equipped with a protection system you from burns. Pressure class PN 10 (material – brass, resistant to corrosion), available with external threaded connection, fittings or adapters.
VTA360/560 is a series similar to the previous one in design, but equipped with a large number of fittings and connections. The instructions assume that the drive of the Esbe three-way device of this series must also be compatible with the specifications specified by the company.
Representatives of the VTA320/520 series can be used both in conditions similar to the operating modes of previous model series, and in systems where other temperature control systems are present.
These valves are recommended for use in hot water circulation (HWC) or underfloor heating systems. Also equipped with “scald protection”. VTA370/570 – models designed for use in a “warm floor” system, have a high throughput.
VTA310 is a sample supplied with an adjustment knob, without a burn protection system. It is used in domestic water supply systems, including closed-circuit hot water supply (HWC) systems. Its price starts from 50 euros.
Valve Design Overview (video)
Installation features and prices
When installing a three-way mixing valve, choose various options, instructions and algorithms for installation. As a rule, the part is not installed directly to the heat source, since the system uses a gravity manifold or “hydraulic arrow”.
In the version for heating, the simplified instructions involve supplying coolant from the boiler to the valve, from there the coolant is supplied to the heating system through a pump.
The liquid that has passed through the heating system and cooled is sent to the boiler for heating, but also to the mixing valve, which ensures temperature control of the supplied substance.
The instructions for the Esbe three-way valve usually include a description of connecting the valve to the system, which may vary depending on the model range.
A three-way valve cw602n Esbe (the brand of brass is indicated here) of the VRG130 model series (namely VRG131 ½) costs an average of $170 (if purchased complete with an actuator).
The price of a three-way valve from Esbe linear VLA330, depending on the configuration, is $150 (not equipped with an electric drive).
The Esbe 3-way thermostatic valve (VTA 320) can cost $70 or more.
The ESBE type three-way valve is just one of the elements of the life support systems of a residential building. On the one hand, this simple design. On the other hand, it performs an important task in engineering networks. Demand creates supply. There are many models on the market presented by different manufacturers. Three-way valves produced under the ESBE brand have good performance characteristics.
Some useful knowledge
Three way rotary valve ESBEThe three-way valve is a control device in liquid piping systems. working environment. Speaking in simple language, built into the design of the heating network, it will act like a well-known faucet that switches or mixes flows. Installing the valve allows you to solve a number of practical problems:
- Redirection of flows coming from different pipelines.
- Reaching the desired temperature working fluid by mixing hot and cold flow.
- Receiving a jet with constant temperature through dynamic redirection.
Difficult? Only at first glance. In order to understand the principle of operation of the device, let's consider its design features.
Design
A three-way mixing valve has a control element, which is a rod or ball. The rod moves vertically, the ball moves around its axis. Since the movement of the control element does not completely block the flow of the working fluid, it is mixed and redistributed. The simplest models are a regular faucet. Their main advantage is low cost and design simplicity. The disadvantage is the impossibility of stabilizing the outlet temperature. Despite the disadvantages, the faucet can be installed in underfloor heating systems. Now let's imagine a faucet with an electric drive. This design is already more functional, since it is capable of adjusting temperature regime automatically. A simple valve is a balancing valve. Its main function is to adjust the cross section for the passage of the work flow. Conventionally, the principle of its operation can be described as follows:
- The handle is turned 50% - uniform mixing of the two flows, since the inlet valves will be equal.
- The handle is turned 100% - the first valve is fully pressed and blocks the movement of liquid flow.
Modifications on the market may have different handle rotations, but the principle of their operation remains the same. The tap and its position are manually adjusted, thereby ensuring a balance between the two flows.
Kinds
There are several types of such devices:
- With hydraulic drive.
- With pneumatic drive.
- Electrically driven.
A motorized three-way valve, such as the ESBE model, will have a slightly different operating principle. The electric drive performs the function of a conventional thermostat, which allows you not only to mix flows, but to maintain set temperature. When the temperature decreases/increases, the drive automatically changes the position of the shut-off valves, increasing or decreasing the cross-section of the hot water flow. At the same time, the cross section at the point of inlet of the cold flow also changes. The result is water with a constant temperature. No human intervention crane ESBE does not require. Its operation is regulated automatically.
Valve operating principle Equipped with electric actuators and thermostats, ESBE valves are equally suitable for use in heating and hot water systems. In principle, the valve can be installed in any pipeline where it is necessary to mix two liquid streams with constant temperature maintenance. No matter how high-quality and reliable a three-way valve with a thermostat is, it will have one drawback that is characteristic of absolutely all devices of this type.
This disadvantage is the strong narrowing of the entrance points. The narrowed cross-section of the inlet point, in turn, increases hydraulic resistance.
Such a faucet will work well in water supply systems. ESBE valves are suitable for installation in underfloor heating systems, but require a special connection diagram. In addition to the designs described above, three-way thermostatic valves are available on the market. These devices are often confused with each other, but they are still completely different. Thermostatic models have a thermostat with a remote sensor, but they differ not only in this element, but also in the principle of operation. Unlike conventional models, in thermostatic taps the flow is regulated at only one point, the remaining two are open and their cross-section does not change. When choosing such a design, you need to check whether there is any narrowing at point 2, otherwise hydraulic resistance will lead to difficulties in the operation of the device. It may be necessary to install a mixing valve in an alternative ring to minimize the problem.
Connection diagrams
Three-way valve - connection diagram Almost all three-way valves on the market are connected according to the same circuit. Let's look at it using ESBE cranes as an example. Let's start with water supply systems, since this is where the mixer tap is used most often. The main purpose for which the valve is installed is to reduce the risk of backflow.. Between the two streams - cold and hot water - there will inevitably be a pressure difference. It can lead to backflow. When installing ESBE valves, such incidents rarely occur. In heating systems, ESBE valves are used in only three directions:
- In mixing units of “warm floor” systems.
- To stabilize the temperature of the liquid flow in the incoming boiler pipeline.
- To reduce the supply of high-temperature coolant from the boiler to the pipeline.
Valve in the mixing unit
Let's look at how the ESBE tap is used in underfloor heating systems. The mixing unit creates an additional circuit in the system. WITH distribution manifold it is connected at two points, which ensures constant circulation of the liquid at the outlet. At the inlet, flow is only provided if additional heat is required. A valve with a thermostat is connected to the mixing unit. Since at point 2 all valves, including ESBE, are narrowed, insufficient pump flow may be observed. To increase it, a second line is created to reduce energy consumption by pumping equipment. A second line is not always required. Some models of three-way valves have sufficient passage.
Diagram of a heated floor with a three-way valve If there is insufficient flow power on the first line, the thermostat will not be able to open the passage to the required amount . The problem is easily solved in two ways: by narrowing the second line or installing it on balancing valve. The second method is more productive. It allows you to fine-tune the flow. You can connect a three-way valve using another scheme that does not require installation balancing valve. For this pump equipment connects to the second line. As a result, the temperature of the inlet and outlet streams is compared. A faucet with a thermostat can be installed in systems with one circuit. The simplest example of such systems is heated floors in small spaces. Creating a mixing unit here , with its considerable dimensions , is not always justified. It is better to connect a heated floor with one circuit. A three-way valve with a thermostat is installed on the return line, through which the cooled coolant flows. In this case, the thermostat will move the shut-off valves, increasing the cross-section and opening the flow. After heating the pipe, the temperature sensor reads the data and reduces the flow.
For heating boilers
Three-way valves for heating boilers should be considered separately. The main task of their installation is to prevent cold coolant flow into the incoming pipeline connected to the boiler. Otherwise, condensation will begin to form on the pipes, and temperature changes in the system will lead to its deformation at the joints. There is no need to talk about the consequences of such deformations. IN best case scenario a small leak forms, in the worst case, the system will have to be completely changed.
Three-way valve in a heating system It is especially important to connect shut-off valves to solid fuel boilers, characterized by significant temperature changes during operation. Connecting a mixing valve makes it possible to ensure that liquid with a temperature below 50 degrees does not enter the inlet of the boiler equipment. As a result, the temperature difference decreases, negative impact cold with all the ensuing consequences is reduced. It is recommended to install mixing valves in systems with plastic piping. The goal here is to prevent high temperature coolant from entering the pipeline. Despite all the advantages of polymers, they do not withstand frequent increases in temperatures above operating parameters. Under such operating conditions, the pipeline quickly collapses. Temperatures recommended by experts range from 75 to 85 degrees. Installing valves can solve many problems, but the model must be selected exactly according to technical characteristics utility network, and must have sufficient passage.
Conclusion
The simplest shut-off valves - three-way mixing valves - important element engineering communications. Modern models created at the intersection of old traditions and modern technologies, allowed us to achieve excellent results their use for a variety of purposes.
I provide passport data and a video of the servo drive working. I also show how to connect and mount and then configure the servomotor for a three-way valve.
And so let's get started...
In this article we will look at the most versatile servo drive today, ESBE 99K2, which is shown in the picture, and the ESBE VRG131 valve.
The servomotor is sold with two connection kits, for two different standards of three-way valves with a circular rotating valve for unlimited rotation. More details will be indicated both in the passport and in the video.
It's important to understand:
1. The three-way valve itself contains a ball valve that rotates in a circular manner for unlimited rotation. For work, the valve must be turned clockwise and counterclockwise from 90-180 degrees of rotation.
2. Servo drive is electrical equipment and a device for rotating this ball valve. By rotating the valve, two passages are opened and closed, and the third passage is constantly open. The servo drive, through a temperature sensor, rotates in the desired direction to open or close the feed hotline circulation. More details in the video and in the passport. We also look at how to configure the valve for a specific circuit.
Servo drive ESBE 99K2, advantages:
- Power supply 220 Volt
- Electrical remote temperature sensor
- Temperature adjustment(15-70 degrees) in real time
- Adjusting the time (1-70 seconds) for checking the temperature sensor and turning on the rotation.
- Rotation adjustment: from 10-180 degrees
- Switching rotation clockwise and counterclockwise (reverse)
At 90 degrees, it is possible to set the required rotation of the ball valve in real time for testing (press the button and scroll). If a 180 degree rotation is required, the handle is not installed and adjustment cannot be made. And this is of no use, the function is only useful for masters when testing the mixing unit.
Flaw: If there is no power, the valve does not return to any position, but freezes in the position in which it was set automatically.
In general, it is used for large facilities where it is necessary to make a mixing unit with a high flow rate (from 2 cubic meters per hour and above).
Acquaintance Three way valve with servo drive
Connection Three way valve with servo drive
Servo setup Three way valve
Passports:
Three-way valve with servo drive for domestic hot water
For many novice plumbers there are many mysteries and mysteries. In this article I will try to explain how it will work with a servo drive of three different models. We will look at the operating logic and electrical connection diagram.
Option 1: Price from 6300 to 9200 rubles. There may be variants of articles.
Option 2: The price is about 2500-5000 rubles, if you try to find it on a Chinese website and order it from China.
Option 3. An expensive option, but there are a lot of options. The price can be about 15-20 thousand rubles.
Connection diagram of a three-way valve with a servomotor for domestic hot water supply
The valve can be installed both on the supply line (supply) and on the return line of the pipeline (return).
Many will ask the question:- Where is it better? For supply or return?
In terms of DHW functionality, this is not important. But there are some nuances why it is necessary to put it on supply or return.
Nuances between supply and return:
Anyone Do any of you know why it is necessary to install a hydraulic accumulator on the return line of the pump? Or does he think it can be placed anywhere? Do you know why the pump is installed on supply or return? Answer: This is because the pressure distribution at different points in the pipeline changes depending on where these elements are located. And in some cases, the reason again becomes the convenience of filling and draining coolant in the heating system. It also helps to avoid airing and much more.
And why Does the boiler equipment manual recommend keeping the pressure at least 1.5 Bar? Because the pressure in the boiler heat exchanger cannot be reduced! A decrease in pressure leads to cavitation of the coolant in the heat exchanger. It also leads to early boiling of the coolant. And all this leads not only to a decrease in boiler power, but also to the deposition of scale in the heat exchangers, which leads to scale deposition and overgrowth of the heat exchangers. Which in turn will lead to a short service life of the boiler equipment.
Do you think, if the pressure gauge shows 1.5 Bar, this means that pressure less than 1.5 Bar cannot be present in the system at the same height. Where is the pressure gauge? Answer: This can happen and more often it happens to owners who independently figure out where the pump and hydraulic accumulator will be located. And they don’t understand how the pressure will be distributed after that.
Also how does a hydraulic accumulator affect pressure distribution: http://santeh-baza.ru/viewtopic.php?f=2&t=93
Why do you need a three-way valve for domestic hot water?
The main task of a three-way valve for domestic hot water is to redirect the movement of coolant from the heating system towards the Boiler indirect heating(another heat exchanger) and back in automatic mode.
As soon as the command comes to heat the indirect heating boiler, you need to redirect the coolant towards the BKN coil. The heating signal is generated by a special relay, which is located at the BKN (Indirect Heating Boiler). That is, the BKN has a built-in electric thermal relay, which provides a switching contact.
What does a three-way valve for domestic hot water look like?
Electrical diagram of valve operation for DHW boiler Thermona?
Electrical diagram with boiler and boiler
The servo drive has three contacts, one common. If you give a voltage of 220 Volts to two contacts (direction 1 + common), there will be one position. For another position, you need to give a voltage of 220 Volts to the other contact (Direction 2 + common). Phase and neutral of a 220 Volt network is not important.
Option 3. Most difficult option, which requires more detailed study. Has a variety of functionalities.
If you have a more efficient heating + hot water system with higher costs. It is not possible to use valves of options 1 and 2, since they have low capacity!
This device consists of two parts:
1. Rotary mixing valve (diameter optional)
Servo drive ESBE
Servo drive model: ESBE ARA641 for 220 Volts. 30 seconds. Article number 12101100
Drive characteristics:
1. Rotate 90 degrees. There is a degree adjustment setting. You can do a little more or move it a little to the side.
2. 3 point control. That is, 3 220 Volt contacts for control: Terminal 1, terminal 2 and common terminal.
3. The time it takes for the drive to rotate 90 degrees depends on the model. Model ARA641 30 sec.
4. Wire cable 1.5 meters.
5. Torque force: 6 Nm.
Servo drive electrical circuit: ESBE ARA641
This device has three conductors: Blue, brown and black.
Blue– common conductor, usually Zero is connected to it
Brown and black These are position 1 and 2 conductors.
When there is a voltage of 220 Volts on the blue and black drives, the drive rotates 90 degrees in one direction.
When there is a voltage of 220 Volts on the blue and brown drives, the drive turns 90 degrees in the other direction.
Such servos have a button to disable the direction of movement. That is, you can force the valve to the desired position during repairs or tests.
Please note that the larger the number, the more torque may be required.
In the ESBE catalog You can choose other valves and servos!
For example,
1. Select not three-point (three-contact) control, but two-point control. That is, one contact goes constant pressure, and to the second contact you simply give or take away voltage.
2. The rotation angle can be more than 90 degrees. For example, 180 degrees.
3. The closing time is not 30 seconds, but much longer. For example, you may need to smoothly transition up to 1200 seconds.
4. Take a drive with a different torque force.
5. Drive 24 or 220 volts.
6. You can choose not only for switching, but also for obtaining the desired temperature by mixing.
Download ESBE catalog for selecting valve and actuator: esbekatal.pdf
If someone has a two-point signal from an indirect heating boiler or from some thermostat that has only a two-point contact, then an electromagnetic switching relay can be used.
This model should be looked for in specialized electrical and electronics stores.
Model: ABB CR-P230AC2. 220 volts are supplied to pins 1 and 2. The load of the switching contacts must not exceed 8 amperes. 8 A x 220 Volts = 1700 W. Can withstand equipment up to 1700 W. Does not apply to pumps and incandescent lamps since the first start-up requires high currents.
In order to connect it to the wires, a special connector is used:
ABB CR-PLSx (logical) socket for CR-P relay
It should look like this:
That's all. Ask questions! Did you understand everything? Maybe something is missing?
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A series of video tutorials on a private home
Part 1. Where to drill a well?
Part 2. Construction of a water well
Part 3. Laying a pipeline from the well to the house
Part 4. Automatic water supply
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Self-priming pump calculation
Calculation of diameters from central water supply
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How to choose a pump for a well?
Setting up the pressure switch
Pressure switch electrical diagram
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Hydraulic calculation of a two-pipe associated heating system Tichelman loop
Hydraulic calculation of a single-pipe heating system
Hydraulic calculation of radial distribution of a heating system
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