Step-by-step connection scheme for an indirect heating boiler

Centralized hot water supply is more a myth than reality. In most settlements this benefit of civilization has ceased to be available many years ago. But there is an excellent alternative - water heaters, they are also boilers. Many models of such units are available for sale: flow, storage, electric, gas, etc.

Step-by-step circuit for connecting an indirect heating boiler

And if specially trained people are to be engaged in the connection of gas water heater, the electric boiler can be connected to the water pipe by own means. The presented guide will help you to thoroughly understand all the subtleties and nuances of this event.

Preparing for heater connection

Choose the location for the unit. It is better that you have free access to all the connecting elements of the system - so it will be more convenient to carry out maintenance of the equipment and perform its repair when such necessity arises.

If a heater storage model is selected, make sure that the wall can withstand its weight with water. Thin interroom walls and plasterboard partitions with this task definitely can not cope.

Install the water heater in close proximity to the water supply pipes - so you eliminate the need for additional infrastructure. Therefore, the ideal place for installing a boiler is a bathroom.

Important! The heating elements of electric boilers have a sufficiently high power. On average, it is about 2 kW.In order to avoid problems with wiring in the future, experts recommend connecting such equipment directly to the switchboard, using as far as possible a copper wire with a large cross-section. The closer the boiler is installed to the dashboard, the less wire will be used. Take into account this moment.

After selecting the place for the heater installation, start preparing the tools and related accessories.

Set for operation of

1. Level.
2. Roulette or ruler.
3. Rotary hammer. It can be replaced by a shock drill.
4. Combination pliers.
5. Adjustable wrench. Tees-fittings. They will allow to make a cut in the water pipes.
6. Stopcocks.
7. Sealing tape. It is necessary to seal the connecting elements. You can replace the paste or special paste.
8. Flexible connecting hoses. Through them, water will be taken and taken away.
9. Additional pipes. Buy as needed. Be sure to ask the seller if the pipes you choose will be able to withstand operation in the upcoming conditions.

How to install and connect a boiler

We are about to install the boiler. Place the water heater to the point of its future placement on the wall. The distance between the tank and the ceiling must be at least 100 mm, otherwise you can not hang the unit on the fasteners.

Water heater capacity, l	Approximate pulling force, kg	Wall material	Recommended bolt diameter, mm	Recommended bolt length, cm
30-50 l	15-25	Concrete	6-8	6-8
30-50 l	15-25	Bricks / cinder block	8-10	8-10
80-100 L	25-35	Concrete	8-10	8-10
80-100 l	25-35	bricks / cinder block	10-12	10-12
150-200 l	45-60	Concrete	10-12	8-12
150-200 l	45-60	Brick / cinder block	12-14	12-15

Mark with a marker or pencil of the fixing point. Do it carefully. If the tank is big and heavy, ask for an assistant.

Drill holes and screw fasteners. Usually they come complete with a tank. If there are no fasteners, buy them separately. Suitable steel hooks.

Before installing the water heater, check the integrity of the threaded connections at the inlet and outlet of the water. Specialists note that hoses and relief valves are often twisted 1-2 turns. If you also found a similar defect, gently drive the thread with a die half an inch. Do not force the valve or hose with force.

Install two separate overhead cranes on the boiler. Examine the appearance of the output threads: you must connect cold water to the blue, and the heated liquid will come out through the red one. Wrap the sealing tape, screw the relief valve into the cold water inlet and connect to the water supply system in a convenient way( using tubes or hoses).Specialists strongly do not recommend the use of flexible hoses, especially in apartments.

Apply cold water to the boiler. Simultaneously open the tap for hot water - so you bleed the air out of the system.

In the end, it only remains to connect the boiler to electricity.

water heater It is strongly recommended not to simply connect the heater to the nearest outlet via a cheap extension cable. Although in practice it is most often done just like this, such a connection option is not safe and correct. Choosing it, all responsibility for possible trouble will lie on you.

The tank is recommended to be connected by a separate branch from the electrical panel. The branch must be equipped with an automatic shutdown device. The recommended power of the machine is 16A.To connect to the electrical network, remove the factory wire from the heater and replace it with a new cable from the shield. For wiring use a three-core copper cable with a cross section of 2.5 mm2.

The water heater must always be earthed. The lack of protective earthing is fraught with a lot of trouble. If the light "pinching" current during the shower can still survive, then the complete output of the wiring and the fire - the situation is much more tragic.

panel. Ground the tank directly in the switchboard. If you do not have the necessary skills for this, invite a qualified electrician. For earthing, it is also recommended to use a copper wire.

Nuances of connecting the boiler to pipes of different materials

Depending on the material of the water pipes, the order of the water heater insertion will be slightly different. See the existing nuances to do the job as high as possible.

Connection to polypropylene pipes

If the pipes are not hidden in the wall, there will be no problems with the boiler connection. The whole work boils down to the fact that you cut the water supply pipes in the right places( depending on the height of the tank installation), solder tees into the prepared holes, and already from them conduct the pipes to the heater. For connection to the cranes, use conventional couplings.

You will spend a little more time and effort on the connection if the pipes are embedded in the wall. In this situation, the order of actions will look like this:

• pipes are opened;
• is implemented by inserting the above scheme;
• pipes are output;
• pipes are closed back.

The connection is made using tees and split couplings. Wait until the complete hardening of the welded joints, connect the connectors and connect the boiler to the water supply.

Connection to metal-plastic pipes

The technology does not allow installing metal-plastic pipes in a hidden way, so with a sidebar no special problems will arise.

It is enough to cut pipes, insert tees and bring elements of water supply to the water-heater. The frame is now complete.

Connection to steel pipes

The most difficult case. In this case, the tank will be fed through the connections of the kitchen faucet. On each branch pipe it is necessary to put on a tee - this will allow to connect the boiler and the kitchen faucet to one pipe without cutting the thread.

Useful advices from

professionals There are a number of important nuances, without knowing and observing which the connection of the boiler to the water pipe will be wrong. You need to know that the hot water system does not need to be equipped with any additional elements, except for the shut-off valve. It is installed on the boiler nozzle.

The cold water connection is installed after the pre-installation of the tee. The tap for tapping excess cold water from the water heater cuts into the side branch of the splitter. Also, the return valve and the cut-off valve are connected to the tee. The latter is connected to the water supply.

When connecting the tank to the water pipe, do the following:

• open the protective window when the heater is on;
• to test an empty boiler. Beforehand, the tank must be filled with water, otherwise the heater can burn;
• drain the water without turning off the preheater;
• complete the water heater with the details from other boilers. The exception is the same models, as well as tanks with compatible spare parts.

Briefly important: safety valve

A separate section deserves such an element of the system under consideration as a safety valve. It excludes the possibility of the back-flow of liquid into the water supply system, and also helps to normalize the pressure in the system by dumping excess water during its heating.

Important nuance: do not install the non-safety valve. Because of this, the temperature relay may break, causing the boiler to explode.

The safety valve is installed at the point where cold water enters the heater. The connection method prohibits the installation of locking elements between the tank inlet and the safety valve.

Important! Observe the condition of the valve during operation of the tank. If the brass device remains dry for a long time, this may indicate a breakdown. The failed element should be replaced as soon as possible.

Now you can connect the heater to the water pipe in compliance with all the requirements and nuances of the technology. This is an excellent opportunity to save on plumbing services and keep the whole process under personal control.

Good work!

Video - How to connect an indirect heating boiler to the