How to choose and connect a security group to a heating system

There’s more to installing a boiler and radiators in your home than that to ensure their safety and efficiency. The security group is one important element that is frequently disregarded. This little but essential gadget is essential to maintaining the integrity of your heating system and guarding against damage.

It can be difficult to choose the best security group for your heating system, especially with so many options on the market. But, being aware of the fundamentals and the things to take into account can streamline the procedure and assist you in coming to a well-informed conclusion.

Understanding the role of a security group in a heating system is crucial first and foremost. In essence, a security group functions as a safety valve, controlling temperature and pressure to avert potentially disastrous malfunctions like boiler leaks or explosions. It prevents damage to the system and your house by releasing excess pressure and managing temperature swings.

A number of considerations need to be made when choosing a security group, such as the kind of heating system you have, the highest pressure and temperature it can operate at, and any applicable local building codes or regulations. For seamless integration and best performance, it’s also essential to take the material, size, and compatibility with other system components into account.

The efficacy of your heating system depends critically on proper installation after you’ve selected the ideal security group. Following the manufacturer’s instructions and paying close attention to details are necessary for properly connecting the security group. A small mistake made during installation could jeopardize its functionality and possibly necessitate expensive repairs later on.

What is included in the security group of the heating system

Three components make up the security group, which is joined by a collector—a technical component that divides the flow into multiple parallel branches.

Automatic air vent

Air masses are intended to be released from the heating system via the automated air valve. The manual cranes on radiators designed by Maevsky is his previous alternative. When the temperature rises above 90 °C, the air in the heating system’s pipes and radiators slows down, the coolant circulates more slowly, and the system becomes less efficient. This can cause damage to the heating system and depressurize it.

Even when used carefully and competently, air can still appear. The most typical causes are:

• initial filling of the heating system with a coolant with air tolerance;
• the release of air bubbles when the water used as a coolant is over 90 ° C;
• improper use of a tap of recharge;
• wear of the elements and components of the heating system, which violates its tightness.

Human configuration or intervention is not necessary for automatic air vents. Air enters the air vent canal as soon as it forms within the system. This cylindrical channel’s float descends, lowering the locking stem, which causes the valve to open and remove all of the air from the channel.

Manometer

The manometer’s function is to show the precise pressure inside the heating system so that indicators can be controlled. Bars are typically used as measurement units. After you’ve adjusted the pressure to a specific level, you can check the pressure gauge to make sure the system is operating correctly, all nodes are completely tight, and other security group members are carrying out their duties.

Safety discharge valve

When a critical mark is reached, the safety valve automatically releases air, steam, or coolant, creating space in the system for the coolant to continue expanding. In addition to air formation, which is what the air vent does, extreme heating can also cause the coolant to expand, which can result in leaks and other damage and an increase in pressure within the heating system.

The boiler heat exchanger, which is frequently rated for three or even two barra, is the most susceptible component of the heating system if radiators and pipes can typically tolerate pressures of seven to nine bars.

The safety valve is chosen based on the highest allowable working pressure; different models are available, each with an adjustable value that is installed during installation and configuration. The spring mechanism, which is utilized in practically all security group options, is the most popular and best in terms of price-quality ratio.

The balance of pressure within the system and the clamping force of the valve spring constitute the fundamental working principle of the spring safety valve:

• From the inside, the coolant exerts pressure on the valve shutter;
• On the other hand, the spool is pressed with a rod on which the spring presses, thereby holding the valve in the closed position;
• As soon as the pressure in the system exceeds the critical value, it outweighs the pressing power of the spring and the valve opens, pulling the excess air, steam or coolant;
• As soon as the pressure drops below the critical mark, the spring strength is enough to transfer the valve to the original closed position.

The operation algorithm

Give a succinct explanation of the group’s guiding principles. An automated air vent starts working as soon as the system is commissioned, expelling all of the air. It is helpless, though, when it overheats and reaches critical pressure marks. The safety valve is activated to prevent an emergency by removing extra coolant from the system and lowering system pressure.

The security group has a manometer that displays the current pressure in order to monitor the system’s performance: low pressure signifies depressurization, malfunctions with the expansion tank, or a tap tap; increased pressure indicates coolant expansion or an excessive steam discharge from overheating.

How to choose a security group for a private home heating system

Selecting a suitable model is not difficult; all you have to do is consider:

1. The maximum allowable system power (kW) for which the knot is designed. This is usually 44, 50 or 55 kW. If the system has lower power – excellent, if it is large – you need to look for a stronger option.
2. Safety valve. As a rule, valves with a fixed value are installed in finished nodes – 1.5 bar, 3 bar, 4 or 6 bar. The position of the operation should correspond to the maximum permissible working pressure of the most vulnerable element of heating systems – usually the steel heat exchanger of the boiler, designed for 2 or 3 bar. It is difficult to find safety valves for 2 bar, despite sufficient demand, it is difficult to find a way out of the situation – to assemble the knot with your own hands, by buying a safety valve and other elements separately (about this, see further).
3. Working temperature -This is the permissible temperature of the coolant, in almost all modern models it is within -10 ° C -110 ° C, which is more than enough.
4. Compatibility with the coolant – if instead of water, antifreeze is used as a coolant.
5. The diameter of the threaded connection – It can be with a diameter of 1 ″, 1/2 ″ or 1.4 ″. You can choose a knot that is inappropriate in diameter of the thread, but then you will have to take care of the selection of the adapter, which is not always simple.

It is crucial to consider the manufacturing material used; stainless steel or galvanized steel are good choices, but not the best. Brass products are more costly, but they are also more robust, resistant to wear, and even more resistant to corrosion. The characteristics may not always specify the material of manufacture; for example, the collector may be composed of steel while the remaining components may be made of brass. A distinctive monophonic, matte color (bronze-golden or silver, depending on the alloy) sets brass apart.

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Best famous manufacturers and models: characteristics and prices

TIM JH-1024-1.5

Among the least expensive, but well-reliable models. possesses a brass collector despite its low cost. The COS has a maximum capacity of 50 kW, a safety valve threshold of 1.5 bar, and a connection diameter of 1 BP. China is the country of manufacture.

Valtec VT.460.0

One of the best pre-made safety groups available for the well-known Italian manufacturer Valtec’s boiler and heating system. Completely composed of nickelled brass, the node features an extra threaded output to connect to the expansion tank. is distinguished by the excellent quality and dependability of all its technical components and compounds. The diameter of the network connection is 1 b, the operating threshold is 3 bar, and the maximum capacity of COS is 44 kW.

Watts KSG 30

Another well-known German company that produces in Italy is Security Group. There is a full range available on the market, with models intended for power outputs of up to 100 and even 200 kW. The collector’s case is made of galvanized steel, which is an expensive drawback considering the quality. On the other hand, there is a thermal insulation casing and brass technical elements. The COS has a maximum capacity of 50 kW, an internal thread annex diameter of 1′′, and an operating pressure of 3 bar.

CALEFFI 302631

Another dependable and excellent (based on components and assembly) model made entirely of brass that comes with a polystyrene thermal insulation shell as part of the kit. It is produced in Italy. The COS has a maximum capacity of 50 kW, an operating pressure of 3 bar, and a threaded connection diameter of 1 VR.

Cost: 4,500–4,750 rubles.

Prices: Final table

Where is the security group

The security group is positioned as near to the boiler unit as feasible, but above its level, on the heating boiler’s feed line. Any filters, locking reinforcement, or other components that restrict the pipeline between the security group and the boiler cannot be installed. The knot in the horizontal plane can be rotated to your preference, but the security group must be installed strictly in the vertical plane to ensure that the safety valve and air vent are in an upright position.

Please be aware that connecting an expansion tank through an appropriate output pipe is advised if one exists. If this isn’t done, a cork needs to be used to drown out the expansion tank’s output pipe.

We’ll walk you through each step of the process in the article "How to Choose and Connect a Security Group to a Heating System," which covers the installation and selection of security groups for heating systems. In order to keep your heating system safe and effective and to stop problems like overpressure and water leaks, you need a security group. We’ll go over the functions of security groups, how to select the best one for your setup, and how to connect them correctly. Knowing this procedure will help you, whether you’re a professional or a homeowner, guarantee the trouble-free operation of your heating system and give you peace of mind for years to come.

Connection to the heating system

The threaded connection to the vertical pipe that was previously assigned to a security group (the diameter of the pipe thread = the diameter of the security group) and the performance evaluation of its modules comprise the entire process of connecting a security group to the heating system. The diagram below shows an example of how a security group is installed.

Following a sealed connection, you must forcefully open the air vent to check its functionality by turning the valve handle (upper cap) until it clicks. We don’t close the air vent. It is preferable to close the automatic air vent during the coolant filling period. It is required to attach a drain pipe to the sewer or the floor (into the prepared container) on the reset valve. In the first scenario, the effects of the collision will be apparent; however, you might not be identified if you are pulled into the sewer after the event.

How to assemble a knot correctly with your own hands

An appropriately constructed security group should resemble a trident with the air vent situated directly above the security group’s pipe in the center. Thus, there won’t be any barriers and the air will enter it with certainty.

The components of a homemade security group are as follows:

• manometer, automatic air vent and safety valve;
• 2 steel or brass squares under 90 ° C of the outer and internal threads (the diameter is selected under the diameter of the threads of the modules and the crosses);
• 1 steel or brass cross;
• 1 coupling/nipple for connecting the knot of the finished node with the tee of the heating system;
• Packla or silicone for compaction of compounds (FUM-toe is not recommended, since it is deformed at temperatures over 70-80 ° C).

Assemble the components according to the illustration below, attach them to the heating system, and evaluate the functionality.

A vital step in guaranteeing the effectiveness and safety of your home’s heating system is selecting and connecting a security group to your heating system. Because there are so many options on the market, it’s important to take into account things like ease of installation, safety features, and compatibility with other systems.

Priority one should be given to compatibility. Make sure the security group you choose is appropriate for your particular heating system. There are security groups made to function with various types of heating systems, including radiant, heat pump, and boiler systems. If you’re not sure which option is best for your setup, speak with an expert.

Safety is the most important consideration for your heating system at all times. Seek out security groups with integrated safety features like temperature sensors and pressure relief valves. By preventing overheating and overpressure, these parts lower the possibility of malfunctions and possible risks.

When selecting a security group, take installation simplicity into account as well. Choose models with easy-to-follow instructions and ease of use. To ensure correct installation and peace of mind, don’t be afraid to enlist the assistance of a qualified technician if you’re not confident in your ability to do it yourself.

It’s critical to install your security group correctly once you’ve chosen the best one for your heating system. Carefully adhere to the manufacturer’s instructions, and make sure all connections are secure by checking them twice. Maintaining the best possible operation of your security group also requires routine inspections and maintenance.

In conclusion, you should not make this decision hastily when choosing and installing a security group for your heating system. You may make sure that your house stays warm, cozy, and most importantly, safe for you and your loved ones by giving compatibility, safety, and simplicity of installation top priority.

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