How to connect two boilers in the heating system

An effective heating system is crucial for maintaining a comfortable and warm atmosphere in our homes. Connecting multiple boilers to your heating system is one way to guarantee adequate heat distribution throughout your home. The comfort of your house can be greatly improved by knowing how to connect two boilers, whether you’re installing a new system or upgrading your current one.

In a heating system, connecting two boilers requires precise planning and execution. It’s not as easy as just plugging them in. A thorough understanding of each boiler’s operation and how it will interact with the rest of the heating system is necessary for the proper integration of multiple boilers. For optimum performance and energy efficiency, each boiler must work in concert with the others.

It’s important to consider your home’s layout and heating requirements before beginning the connection process. Take into account variables like the number of rooms, the size of the area you need to heat, and the insulation levels. Knowing what you need will help you choose the boiler location and capacity that will work best for you.

One of the most important things to consider when connecting two boilers is how well they will function together. This entails combining them into a single heating system that can provide uniform heat throughout your house. For both boilers to function effectively and help maintain a comfortable interior temperature, proper piping, controls, and balancing are necessary components.

In setting up a heating system, connecting two boilers effectively is crucial for efficient and reliable performance. By properly linking the boilers in your heating setup, you can ensure consistent warmth throughout your home while also maximizing energy efficiency. Firstly, it"s essential to assess your heating needs and select boilers that can collectively meet your requirements. Then, ensure that both boilers are compatible and properly sized for your system. Next, establish a parallel or series connection based on your heating demands and system layout. Implementing appropriate piping and valves is key to evenly distributing heat and maintaining balanced operation between the boilers. Additionally, integrating controls such as thermostats and zone valves can help regulate temperature and optimize energy usage. Regular maintenance and monitoring are essential to keep the boilers running smoothly and efficiently over time. With careful planning and installation, connecting two boilers in your heating system can enhance comfort while minimizing energy costs.

In what cases it is necessary to install two boilers

The choice to install a second boiler is typically made when the primary boiler is unable to independently supply all of the heat load required by the interior heating system. The issue with boiler equipment power is resolved by such a scheme.

However, there are additional justifications for linking two boilers to a single heating system in order to maintain a hygienic temperature in the space:

1. An erroneous preliminary calculation of the thermal power of heating plants.
2. Increased heated area of the house.
3. The need to increase the functional capabilities of the heat supply source, for example, the installation of a hot water system or heating the air in the calorifier installations.
4. Increasing the autonomous operation of the heating source when using different types of energy carriers, for example, solid fuel during the day and electricity for diphthral accounting at night.
5. The lack of stocks on the main fuel allows you to use two boiler units operating on different types of fuel.

Requirements for premises with two boiler units

In the event that the same type of heating sources are selected, the requirements for the combustion are applied to a certain type of fuel used: gas, coal, pallets or electric heating.

When choosing units that operate on distinct energy sources, the premises must match both, and a larger indicator must be chosen.

Specifications for solid fuel-using units:

1. The floor area of the furnace room is selected according to the total thermal power of the devices: up to 32 kW required 7.50 m2, up to 62 kW – 13.50 m2, up to 200 kW – 15.0 m2.
2. The unit of more than 30 kW is installed in the center of the combustion to ensure reliable circulation of air masses.
3. Superficial elements of the furnace: floor, walls, ceiling and partitions are made of fire -resistant building materials, using waterproofing protection.
4. The boiler is installed on a reliable foundation from fire -resistant building materials.
5. For units up to 30 kW, the requirements for fire resistance are lower, it is enough to cover it with a steel sheet.
6. The supply of solid fuel is stored in a separate dry room, and the daily supply can be in the boiler room at a distance of at least 1 m from the boiler.
7. In the furnace, the door and windows can be installed that can provide reliable three -time air circulation at the rate of the existing volume of the room.

Top-level requirements for gas-operating boiler units:

1. Gas boilers with a total capacity of up to 30 kW are allowed to be installed in a non-residential room of the house, where there are windows and doors that can provide 3-multiple air circulation.
2. With a power of a gas source of more than 30 kW, a separate furnace with a ceiling height of at least 2 is required.5 m and a total area over 7.5 m2.
3. If this equipment is installed in the kitchen in which the gas stove operates, then the room should be at least 15 m2.

Connection schemes

A very important step is to tie two different boilers into one thermal scheme. With the exception of thermal equipment operating inefficiently, any small mistake can result in a crisis inside the home.

The design organization should be tasked with the computation of the two-leather connection scheme so that they can select the best pair of units with a parallel or consistent strain and control options (manual or automatic).

Automatic boilers

From a hydraulics perspective, this scheme differs little from the manual control principle because it only has two check valves installed.

In order to prevent "parasitic" or idle coolant flows through the boiler unit—which is in reserve—this is necessary. Another way to solve this issue is to install a hydraulic shot. On the return highways pointed in the direction of one another, finding valves are installed.

Additionally, a thermostat that shuts off the forced circulation pump is required for this system. After the boiler’s coal burns through, there will be no purpose in running idle water through a stopped apparatus, which will hinder the second device’s ability to function.

Connection scheme 2 boilers with manual control

In this implementation, shut-off-regulating reinforcement is the only requirement for maintaining the boiler units’ consistent operation. By opening and closing two valves on the reverse coolant line, the operator switches between the units manually. You must close the fourth valve and pair on the feed and return in order to entirely stop the flow of hot water.

To account for the thermal expansion of water during the heating process of the boiler from a cold state, I incorporate expansion tanks into my schemes. It is not advised to leave one tank empty in an attempt to save money because it might not be able to handle the load when two boilers are operating.

Consistent and parallel inclusion

These two widely recognized threads of the pairwise binding of two boilers.

Consistent means using different units in different places without adding extra lines or nodes. In this instance, the unit heats the water in the direction that the water moves, and the second one warms it to the appropriate temperature.

Two locations where the flows of direct and reverse coolants connect are arranged in a parallel diagram. Boilers operate independently of one another in this version.

For tiny heating sources, the first choice is utilized. The fact that one unit cannot be removed for repairs without impairing the functionality of another makes it extremely uncommon in practice and is regarded as impractical.

If even one unit in the scheme malfunctions, it will not function. By adding bypass lines and an additional shut-off-regulating reinforcement, this scheme is partially modernized today.

The installation of an automatic control unit and a hydraulic rifle is made possible by the parallel inclusion in a single strapping of differentotypic boiler units, which is regarded as predominant.

Binding patterns by boilers

Although connecting the operations of two identical units is fairly simple, real operating conditions are not always possible. It is more common to need to combine the operation of units using various energy carriers in addition to different powers.

The most often used two-leather scheme pairs are:

• gas fuel and electricity;
• gas and solid fuel;
• firewood and electricity;
• propane and electricity;
• stove fuel and electricity;
• Pellets and electricity.

Connection of a gas and floor -fuel boiler

This is the most technically difficult method of strapping two boilers because it depends on the smoke ventilation system operating properly and the room’s dimensions being met in order to install large, potentially dangerous objects.

The design organization is the best choice to develop the plan because it must consider all safety regulations for both gas and solid fuel boilers.

Installing a multi-circuit system allows the heating network to operate at its best, necessitating the connection of boilers with two separate contours.

Since solid fuel devices are essentially incapable of controlling coolant temperature, an expansion tank installation should be done in conjunction with an open heat supply system.

Furthermore, utilizing a closed heat supply system with a gas and solid fuel boiler unit is unacceptable and a major fire safety hazard.

Electric and gas

Extremely manageable and efficient scheme. By integrating gas and electric boilers into a single heat supply system, a significantly higher thermotechnical effect can be achieved. Additionally, the circuit can operate more economically than conventional gas boilers when the unit operating modes are properly combined.

Since gas boilers have the lowest cost of thermal energy, they typically serve as the host in this pair. Using the lowest tariff, the electric circuit on the diphthide electricity accounting is turned on at night.

Such a plan for the strapping of boilers must be considered when selecting the equipment’s thermal power. The electric boiler can operate at its maximum power during the night or during periods of high heat consumption, but the gas unit ought to have greater power. There are no restrictions on this pair of boilers operating together in regulatory materials. Nevertheless, the boiler room project must be coordinated with the energy supervision and gas service during installation.

Connection of solid fuel and electric boiler

An efficient way to use a combined heat supply source is to connect an electric and solid fuel boiler. The solid fuel base boiler can run at a single load for at least eight hours. He does a good job of heating up the heat source.

The electric boiler is included in the operation in the mode of maintaining the temperature schedule after the fuel runs out and the coolant has cooled to 60 seconds. Having a hot water-water-water tank that is heated by an electric boiler in night economy mode is recommended for increased energy efficiency.

Because of the inertia of the combustion process, the solid fuel boiler itself has poor regulation and will operate at nearly nominal efficiency until the fuel runs out.

In this instance, the heating mode will be changed in the secondary heating circuit from the tank-accumulator through a three-way tap by connecting the hot supply line and the cold reverse coolant water. This will work to heat the primary circuit in the accumulator tank.

A heating system’s efficiency and dependability can be greatly increased by connecting two boilers, guaranteeing constant warmth throughout your house. You can optimise the advantages of multiple boilers operating in unison by meticulously organising and carrying out the connection process.

First and foremost, it’s critical to evaluate your heating needs and decide if connecting two boilers is required. This choice will be influenced by various factors, including your heating requirements, the size of your home, and the local climate. If you often have cold spots or inconsistent heating, adding more boilers might be helpful.

Make sure that both boilers are compatible and the right size for your heating needs before moving forward with the connection. To guarantee balanced operation, they should ideally have comparable capacity and efficiency. Furthermore, ascertain whether the integration of a second boiler into your current heating system can be done without placing an excessive amount of strain or imbalance on it.

Seek advice from a certified heating engineer before connecting the boilers to guarantee both optimal performance and adherence to safety standards. Installing extra controls, valves, and pipework may be necessary for the process to enable correct operation and temperature regulation. For optimal energy efficiency and to reduce heat loss, pipe insulation must be done properly.

After the boilers are connected, regular upkeep and observation are necessary to guarantee their safe and effective operation. To find problems early and fix them quickly, monitor fuel consumption, boiler temperatures, and system performance as a whole. By taking proactive measures, you can extend the life of your heating system and avert possible malfunctions.

In conclusion, connecting two boilers in a heating system requires careful planning, proper installation, and ongoing maintenance. When done correctly, it can improve heating efficiency, provide greater reliability, and enhance comfort in your home. By following these guidelines and seeking professional guidance when needed, you can enjoy the benefits of a well-integrated heating system for years to come.

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