The connection of a gas boiler should be taken seriously. However, such work is usually not accompanied by difficulties, the main thing is to comply with safety rules so that the operation of heating equipment is not accompanied by risk. The simplicity of the work is due to the fact that some of the main strapping nodes are included in the gas device, among them it should be highlighted:
- expansion tank;
- pump;
- security group.
If you compare a gas boiler with a solid fuel, then for the latter you will need to purchase the listed components, bring them into the house and make the connection.
The algorithm of work
Before tying the boiler, the room must be prepared. Next, connect the chimney. If it is coaxial, then it is installed before installing the heating equipment in its place. At the next stage, you will need to prepare the harness and connect the device, only then you can start connecting the gas pipeline.
Installation features and basic requirements
Before you begin, you must select a gas boiler connection diagram. If you have to install outdoor equipment, then before you start, you need to check the foundation for strength, if necessary, strengthen it. When a wall-mounted device is connected, its installation should occur after creating a chimney, fixing the bracket and hanging the device itself.
The chimney can be classic or coaxial. In the first case, we are talking about devices that are suitable for boilers with natural draft. The second type of chimney is designed for forced draft equipment. Classic chimneys are made of metal steel pipes, which are additionally insulated. Coaxial chimneys are assembled from pipes that are part of the boiler kit. Such devices are immediately connected to the heating unit.
Regardless of the gas boiler connection scheme, you must comply with some requirements. Among others, it should be highlighted:
- the presence of a gas sensor ;
- maintaining the distance between the boiler and the walls;
- the presence of a boiler room with outdoor equipment;
- the presence of a layer of material between the wall / floor, as well as the heating unit.
Safety requirements
If you purchased a floor boiler, then it should be located in a boiler room with a volume of more than 15 m 3 . The room should have a separate entrance, inside there should be a window, the area of which is 0.45 m 2 . It is important that ventilation is provided. The room must have a gas sensor.
The layer of material between the floor and the wall, as well as the boiler, must be non-combustible. The nearest gas appliances are 20 cm away. A distance of 30 cm or more should be maintained between adjacent walls and the boiler.
Features of traditional schemes
The gas boiler connection scheme in a private house may not require compliance with certain rules, which will be listed below. Their implementation is not necessary, but can extend the life of the boiler and facilitate the maintenance of the system. Shutoff ball valves should be installed on the water pipes of the equipment. The water purification filter can be installed on the pipe through which chilled water flows. This protects the heat exchanger from contamination. After all, substances that can contribute to this come from the heating system. A similar filter is also installed on the cold water pipe on the 2nd circuit.
Sometimes the gas boiler connection scheme in the house involves the installation of shut-off ball valves on both sides of the filters, which facilitates their cleaning. The harness may include a chemical water softener that reduces stiffness and eliminates scale formation in the heat exchanger. It can be placed on the return pipe.
When connecting the equipment to the heating line, you can use detachable threaded couplings and the same pipes that form the basis of the heating system. The first is necessary if there is a need for dismantling the boiler. Thanks to this, the integrity of the pipes does not have to be violated. In the heating system there is a lower circuit on which a tap for draining water from the heating equipment is installed. Thanks to this, all the water does not have to be drained from the network.
Any scheme for connecting a gas boiler to heating requires a valve to drain the water. It is located on the bottom of the network. A make-up pipe should be connected to the water supply line to the system. This will not allow the coolant to enter the hot heat exchanger. The rule must be observed with respect to classic gas boilers.
If there is a condensation device, it is better to connect the supply line to the processing line. The shut-off valve between the safety group and the boiler should not be installed. This requirement is advisable if the node is part of the device.
Correct wiring diagrams
The easiest way to connect a gas heating boiler is to directly connect the device to the heating system. The supply and return lines of the heating network are connected to the nozzles of the unit. The above nuances should be observed. Such a scheme is suitable for simple heating systems. Usually they are in apartments and small private houses. Such a scheme is suitable only when a boiler with a safety group, an expansion tank and a circulation pump is used.
If the heating system is quite complex and involves the presence of high and low temperature elements, for the consistency of the movement of water in the house, the circuit should be supplemented with a hydraulic divider. Among the mentioned elements, towel warmers, underfloor heating, radiators should be highlighted.
A separator is needed to smooth out the influence of some contours on others. Such a gas boiler connection scheme is suitable for the case if the house has a separate circulation pump on the circuits of the heating system. At the same time, the pump is switched on in the warm floor, and in the wiring of radiators and pipes - an additional pump.
Scheme with additional heat exchanger
If you want to waterproof some of the system circuits, you can use the scheme mentioned in the subtitle. This need arises when using different coolants in the circuits. This indicates that water can move in one circuit and antifreeze in the other. The gas boiler connection diagram will look like this:
- heat exchanger;
- boiler;
- heating system circuits;
- security features;
- drain cock;
- make-up tap on each circuit.
A heat exchanger is a heat accumulator with three or more coils. One will go the water heated in the heating equipment, the other - different coolants. From the first coil, heat will be transferred through the water in which the other coils are located.
Having an additional heat exchanger has the benefit of being able to combine a closed and an open system. The latter is the safest for the operation of heating equipment, while the former is sparing for radiators.
Circuit with boiler
The wiring diagram for a single-circuit gas boiler may assume the presence of an indirect heating boiler. You can implement this venture using different rules. One of the technologies involves connecting the boiler in parallel. This will require a three-way valve. It should be located on a flexible pipe connecting the boiler supply pipe and the battery. Thanks to this, water will circulate through the boiler and move around. Such a scheme is accompanied by the attachment of a flexible pipe to the return line. The first will move away from the boiler.
Indirect heating boiler can be included in schemes where there is a water gun. This option is suitable for systems where the number of circuits is quite large. For implementation, it is necessary to fulfill one rule, which consists in installing a safety group on a circuit with a boiler, to which a circulation pump is also connected. Some circuits may involve serial connection of a boiler.
If you choose a wiring diagram for a dual-circuit gas heating boiler , the described one may also work. But the situation with the dual-circuit unit has one exception. The hot water supply system will need to be connected to the second circuit. Thanks to this, it is not necessary to use an indirect heating boiler, but there is a nuance here. Bypass equipment is suitable for homes whose residents consume a small amount of hot water. But when the volume of fluid consumption is large, the second circuit will not have time to heat it. Devices with a layer-by-layer boiler or storage tank can mitigate the situation.
Instructions for connecting dual-circuit wall equipment
The connection circuit of a double-circuit gas boiler assumes the presence of a shut-off valve and a filter on the pipeline. The last device will ensure the purity of the water in the system. You can also do it yourself. To do this, using a threaded connection, the device is screwed onto the pipe pipe. It is important to pay attention to the arrow on the device, which should indicate the direction of the water.
The connection circuit of the double-circuit gas boiler must include a shut-off valve, which will be needed if it is necessary to shut off the water supply to repair the boiler, replace or clean the filter. Next, connect the pipe nozzles and the heating system. It will be necessary to install shut-off valves, connect them to the boiler. The shut-off valve must be ball.
When studying the connection scheme of a wall-mounted double-circuit gas boiler, you should pay attention to the fact that the equipment includes an internal circulation pump. He will be responsible for the distribution of heat across the radiators. This device requires special strapping. A wall-mounted unit depends on electricity, so a power outage will reduce the efficiency of the system, which will be accompanied by a loss of thermal energy.
At the last stage of the connection, it is necessary to tackle the gas pipeline. A place should be found for the boiler so that it is closest to the gas pipe. The wall gas boiler connection diagram, however, may involve the use of special gas hoses. But they should not be long. It is better to bring the pipe to the installation site of the heater.
Description of the connection scheme and installation features of outdoor equipment
To start, the boiler is installed in its place. It can be a podium made of a refractory slab or a concrete base. If the room has a wooden floor, cover it with a metal sheet that extends 30 cm around the boiler body. For private homes, you can use another option. For the heater, a recess is prepared at 0, 30 m below the floor level. The bottom of the pocket is poured with concrete, and the walls are finished with non-combustible material.
For the boiler you will need a chimney, for which, in turn, you need a hole. The diameter of the intended parts must be checked again. It should be slightly larger than the cross section of the pipe. A transition adapter is put on the boiler outlet pipe, which connects to the chimney. Corrugation is prohibited when using wall-mounted equipment. The design is fixed to the wall or ceiling with clamps and brackets.
The connection diagram of the gas floor boiler at the stage of connecting to the heating system is accompanied by a drain and supply pipe to the heating equipment. For single-circuit devices, work ends here, while for double-circuit units, it will be necessary to connect to the water supply.
First you should deal with heating pipes. To protect the boiler from scale and dirt, a strainer must be installed. Shut-off valves are installed on the return line and on the supply, which prevents airing of the batteries and makes repairing the heater easier. To seal when connecting the elements, it is important to take care of the sealing. For example, in the case of a thread, tow or paint can be used.
The procedure for connecting the boiler to the water main is almost the same. It is important to install a filter so that no dirt gets into the device. Shutoff taps are installed on the water pipes. It is better to use American women with detachable joints, which allow you to replace a worn assembly quite quickly. In addition, it facilitates installation.
Finally
At the stage of improvement of the building, it is required to connect heating equipment. If it is a gas appliance, the work is one of the most responsible. The quality of installation work and the selected materials will depend on comfort in the home. A correctly selected strapping scheme can protect the system from overloads and provide heating for all rooms.