How to install and connect a dual -circuit gas boiler to the heating system

A dual-circuit gas boiler installation and connection to your heating system is an essential step in guaranteeing your house remains warm and cozy all year round. An effective installation or upgrade of an existing system depends on your ability to comprehend the steps involved. We’ll walk you through all of the crucial procedures and factors to take into account for this significant home renovation project in this guide.

It is imperative that you become acquainted with the parts of a dual-circuit gas boiler system first and foremost. Dual-circuit boilers can supply your home with hot water as well as heating, unlike single-circuit boilers, which only heat. They are a popular option for many homeowners due to their versatility, which increases efficiency and convenience.

It’s critical to evaluate the heating needs of your house and choose the right dual-circuit gas boiler size and capacity before installation. Your choice will be influenced by various factors, including the number of occupants, insulation levels, and the size of your property. Making the best boiler choice for your requirements can be ensured by speaking with a licensed heating engineer.

Installation comes next after you’ve selected the ideal boiler. Usually, this process entails attaching the boiler to your current heating setup, which could consist of underfloor heating, radiators, or both. For safety and compliance, it’s crucial to carefully follow manufacturer instructions and abide by local building codes.

Care and accuracy are needed to connect the boiler to your heating system correctly. Installing controls, valves, and pipework is part of this process to guarantee maximum effectiveness and performance. It is imperative to take into account variables like flue installation and venting in order to securely release combustion gases from the boiler.

Ultimately, it’s critical to thoroughly test the system to make sure everything is operating as intended after installation is finished. Pressurizing the system, looking for leaks, and modifying settings to get the ideal temperature and comfort levels throughout your house might be part of this. To keep your boiler operating efficiently for many years to come, regular servicing and maintenance are also necessary.

We install the boiler correctly

Gas heating boiler installation and connection are subject to stringent regulations, in contrast to the installation of electrical and solid fuel units. Here’s how it works:

1. Contact the organization that supplies natural gas for permission to connect to the external network. The company issues technical conditions (TU) to join the highway.
2. According to the issued TU, a licensed company develops design documentation approved by the engineers of the organization of gas supplier.
3. After approving the project, the trained personnel of the company connects the gas -controlled installation to the external network.

Hint: Bring the passport of the purchased heater and the technical paperwork from a private residence when you speak with the management company. The second moment: the personnel of the "gas" office will undoubtedly be prompted by the appropriate project company.

Thus, the conclusion is that the best time to begin physically installing and connecting a double-circuit boiler is during the design phase, when the heating unit is assigned to the appropriate room in the house. The Gorgaz experts will not connect the trunk pipe if you put it in violation of the regulations.

It won’t harm you to familiarize yourself with the guidelines, even though the design engineer must know all the specifications for the positioning and connection of the gas boiler:

• room for the location of the heat generator: the kitchen (if the power does not exceed 60 kW), a separate room on any floor (up to 150 kW), an attached or separate furnace;
• The minimum height of the ceilings of the kitchen or furnace – 2 m, volume – at least 7.5 m³;
• If two gas apparatuses are placed (for example, a boiler + column), then you need to overlap 2.5 m and volume 13.5 m³;
• Ventilation: a natural extract of air in the amount of 3 volume of the room per 1 hour, for the influx to this amount add air to burning (the volume is indicated in the heater passport);
• The walls of the furnace should be non -combustible or protected from the fire and spread of flame;
• The minimum allowable area of the transparent part of the windows is 0.03 m² for each cubic meter of the volume of the combustion (called – a light -abandoned structure flying out of gas explosion);
• The passage in front of the thermal unit is not less than 125 cm, on the sides – 70 cm for maintenance;
• The distance from the boiler to the vertical chimney channel is no more than 3 m.

Note: The kitchen is ventilated by a window and a lumen located 0.025 m² beneath the front door. If necessary, passages are made in front of the heat generator; it must be able to withstand pressure from the sides and back.

Underneath the housing of a wall gas boiler installed on a wooden partition is a non-combustible sheet:

• Roofing steel 0.8-1 mm thick;
• asbestos 3 mm (unusable in the kitchen due to the dust output);
• basalt cardboard;
• Plates of mineritis.

Protection should be 10 cm larger than the case, with an additional 700 mm on top, as shown in the picture.

The manufacturer’s operating instructions, as illustrated in the diagram, specify the distance between the hinged heater and any nearby structures or cabinets. The floor heat generator is placed on a non-combustible base; a metal sheet needs to be placed over a wooden floor to keep it safe.

In this guide, we"ll walk you through the process of installing and connecting a dual-circuit gas boiler to your heating system. With clear, step-by-step instructions, you"ll learn how to safely and effectively integrate this essential component into your home. From preparing the necessary tools and materials to understanding the layout of your heating system, we"ll cover everything you need to know. Whether you"re a seasoned DIY enthusiast or a beginner looking to tackle your first home improvement project, this article will equip you with the knowledge and confidence to successfully complete the installation process. By following these guidelines, you"ll ensure that your home stays warm and comfortable throughout the year while maximizing energy efficiency and minimizing utility costs.

Binding wall models

The lower section of the gas double-circuit boiler releases five fittings with outdoor threads that are intended to connect the following highways (left to right):

1. The supply of heated coolant to the heating system.
2. The release of hot water guided by consumers (bathroom, kitchen, and so on).
3. In the middle there is a gas pipe eyeliner.
4. Cold water entrance.
5. Return pipeline from the heating network.

Every suspended unit has the pipes in the same place. We recommend watching this video about the operation of a double-circuit wall heat generator if you’re curious as to why the fixtures were installed in this particular order:

Significant observation. Two contours and five exits are a long way from a boiler sign. Water heater manufacturers frequently include extra pipes with single-circuit heat generators so that they can be connected to an indirect heating boiler in the same sequence.

In order to manually connect a gas unit to a private home’s power and heat supply mains, get ready the following supplies and equipment:

• Ball crashes with Americans the size of ½ inch – 3 pcs.;
• The same, with a diameter ¾ ” – 4 pcs.;
• Mesh filter for water and coolant (he is also a mud) – 2 pcs.;
• gas filter;
• expansion tank;
• pipeline fittings – tees and knee;
• Cable Electric three -core brand VVG with cross section 2.5 mm²;
• circuit breaker automatic two -pole lane 20 amperes.

This list is suggested for wall-mounted boilers with an open combustion chamber that are the least well-equipped models. The mini-boiling products in the middle and top price range come with their own expansion tank and gas filter.

Following our instructions, it is advised to compare the size of the heat generator’s standard capacity with the quantity of coolant in the heating system. You must install an additional membrane tank when the pipeline network is too big and the tank’s volume is insufficient.

Connection scheme to the heating system

Actually, there are only a few minor details that need to be taken into consideration; the binding of a double-circuit heater does not constitute a problem. One thing you should know is that a gas boiler is a dependable product; during its whole operating life, it is unlikely to be taken apart and rendered inoperable for maintenance. During the service life, similar circumstances arise one or two times.

Thus, the conclusion is that the primary purpose of overlapping cranes is to keep the heating system operating. The heat generator probably doesn’t need to be turned off and disassembled.

The standard wall-type dual-circuit boiler connection diagram is shown above and can be found in each product’s technical passport. We enlarged it to show the wiring and potential users. Pay attention to the plan and execute a strapping while considering the following advice:

1. Cranes with a diameter of ½ inch (DN15) put on a gas fittings, cold and hot water.
2. Ventiles in size ¾ ”(DN20) mount on nozzles with coolant. The third crane is designed to empty the system.
3. The reinforcement is screwed down by Americans down.
4. Mud at the entrance from the water supply and the heating network install in the horizontal position the “nose” down, so it is more convenient to clean them.
5. The external expansion tank attach to the opposite pipeline using additional reinforcement to cut off and empty the container, as illustrated in the diagram.
6. Plum pipe / subtracts with the tap, put at the lowest point of the system.

Suggestions. It is far more convenient to pack and screw valves to the fittings before hanging the boiler on the wall. If handles or "butterflies" get in the way of rotation, unscrew the rod’s nut to get rid of them. The dielectric gasket is used to install the gas valve.

When a homeowner fills the system with non-freezing coolant and wants to be resettled, an alternate plan for double-circuit heater binding is suggested. It is possible to disassemble the boiler and service the system without having to drain the antifreeze because of two cranes that are mounted on the feed and return.

The plan is applicable to two- or three-story buildings with radiator networks, water heating floors, and other systems where an additional expansion tank is required. Our expert Vladimir Sukhorukov will clarify the main points of the matter in a training video.

Joining a house network

Connecting an electrical line only requires two simple requirements: grounding and circuit breaker protection for the line. There is no need to run an additional cable to the distribution shield if the furnace room does not contain any powerful machinery, such as an electric boiler. In a nutshell, the specifications sound like this:

1. Place the switch in a safe place where water or coolant will not get in the case of a breakthrough.
2. The presence of a wire connected to the ground circuit is mandatory. If the cord in the boiler has no third core, connect the conductor to the steel body of the heat generator.
3. It is not allowed to use metal heating pipes and water supply as grounding for grounding.
4. Put the cable in a protective corrugated sleeve.

As a point of reference. Turbocharged boilers manufactured in Europe are phase-correction sensitive. The boiler cannot be operated by the electronic control unit if the zero and phase wires are mixed up.

It is preferable to arrange the unit’s note through a stabilizer that guards against electronics burnout in locations with erratic network voltage. Frequent power outages are an indication that you should invest in an uninterrupted power source; otherwise, you run the risk of losing heat when you turn off.

Installation of the floor unit

There are two types of stationary double-circuit heat generators that burn natural gas: those that depend on energy and those that need a power source. The second follow the same layout as the wall-mounted "brothers" in terms of being connected to both electricity and heat.

The energy -dependent floor boiler heats water on the hot water supply using a coil of copper or stainless steel built into the main heat exchanger. The burner, safety automation, and heat exchanger are the only components of the heater’s equipment. Apart from the cranes mentioned in the preceding section, you will require purchasing:

• a security group with a safety valve designed for the working pressure of the heat generator (indicated in the passport);
• circulation pump;
• Expansion tank of the calculated volume (10% of the total number of coolant).

The image displays the heating unit’s circuit in the closed-type heating network.

A brief explanation of how to link a double-circuit flooring boiler to the heating system’s gravity circuit. It does not require the security group or the pump, but it will require an open expansion tank with an overflow. Pipic diameters: 40 mm or more; the laying is done at a slope of 5 mm for every 1 m of sag. Transporters. The open tank is positioned at the highest point in the system, and the heater is at its lowest point. If there is electricity available, you can use a pump that is mounted on the bypas to arrange for forced circulation.

Double -circuit boiler and an indirect heating boiler

Homeowners who were dissatisfied with the way their gas heat-heat generator was operating started to exhibit this combination. This is not shocking, as the medium-power unit can only generate 10–13 liters of hot water per minute, insufficient to serve both the kitchen and the shower cabin at the same time.

In addition, the indirect heating boiler that was purchased is connected in an erroneous manner to a double-circuit boiler as shown in the diagram. A second circulation pump is produced by duct imitation, and it is incorporated and shut off at the thermostat’s signal.

A comparable plan operates improperly, which explains why:

1. The heating unit gives out water from the contour of the hot water with a maximum temperature of 60 ° C. Passing through the coil of the boiler, she can never heat its contents (and this is 150-200 liters) to the same temperature.
2. From the heat exchanger of the boiler, hot water 50-55 ° C comes into the second contour of the boiler instead of cold. It instantly heats up with a burner, disconnecting at the signal of the temperature sensor. But due to the duct, the inclusion occurs again after a few seconds-there is a “clue” (Stop-stop mode), which reduces the resource of the heat generator.
3. The boiler heats up much longer than the due time – from 40 minutes to 2 hours, depending on the power. During this period, the heating is disabled – the unit is occupied by the DOS contour (the video is said above in the video). The house cools down.
4. A harmful bacterium living in warm water is propagated in the storage tank – Legionella. Removed by a weekly warmer warmer to the maximum temperature, which is unrealistic to achieve.

Connect the indirect heating boiler to the gas boiler’s main heating circuit using the appropriate circuit so that it can be loaded in 20 to 25 minutes. DIS pipes just drown out; the heat generator’s resource is unaffected. In his video, the specialist will provide more details on the subject:

A dual-circuit gas boiler installed and connected to your heating system can greatly improve your home’s comfort and efficiency. You can guarantee a secure and efficient integration of this crucial appliance by taking the right procedures.

First things first, it’s important to comprehend the design of your heating system and the features of the boiler model you have selected. It’s important to spend some time carefully reading the manufacturer’s instructions because every boiler may have different installation and connection requirements.

Make sure the boiler is installed in a space that is adequately ventilated and has access for maintenance and repairs. Enough ventilation is necessary to keep the boiler operating safely and to keep dangerous gases from building up.

The domestic hot water system and the heating system must then be connected to the boiler. Installing pipework, valves, and controls is necessary to enable water flow from the boiler to the various heating infrastructure components in your home.

To ensure optimal efficiency and prevent heat loss, the pipework must be properly insulated. To further optimize energy usage, thermostatic radiator valves (TRVs) can be installed to help regulate the temperature in individual rooms.

It’s crucial to carry out careful testing and commissioning after installation to make sure the boiler is operating as intended. This could entail changing configurations, clearing the system of air, and looking for any leaks or problems.

To maintain the safe and effective operation of your dual-circuit gas boiler, regular maintenance is required. Plan yearly boiler servicing to ensure optimal performance and extend the boiler’s lifespan. A qualified technician will inspect and clean the boiler.

In conclusion, careful planning, close attention to detail, and compliance with safety requirements are necessary for the installation and connection of a dual-circuit gas boiler. You may take advantage of a dependable and energy-efficient heating system in your house by following the above instructions and getting expert help when necessary.