Installation of a circulating pump in an open type heating system: circuit, photo

At present, many private houses still use old-style heating systems - open type. In such networks, the heated water flows through the pipes by gravity due to thermal expansion, which is not very convenient. Far from the boiler radiators in such systems are heated worse than near ones. As a result, heat is distributed unevenly about the house. An exit from this situation can be an insert into the system of the circulation pump. Worth such equipment is not too expensive and electricity consumes a bit. The benefit of it is huge. Installing the circulation pump in the heating system is not an easy operation, and can be done by yourself.

Device

You can buy the pump in any store specializing in the sale of equipment for all kinds of engineering systems. Its design is quite simple. In the case of stainless metal there is an electric motor. The impeller is attached to its shaft. It is it that drives water through the pipes.

Varieties

There are two types of circulation pumps:

• "Dry". This type is most often installed in heating systems in multi-storey buildings. Such pumps are very loud and very powerful. They are usually installed in separate rooms.
• "Wet." At such pumps, the rotor rotates directly in the water. This is not too powerful, "quiet" equipment. In the event that the owners of the country house came to the decision that the installation of a circulating pump in the heating system of a private house is a necessary thing, they should think about acquiring such a model.

How to choose

When buying a circulation pump, first of all, pay attention to such a parameter as the discharge head. To define it is very simple. To do this, the total length of the water pipe must be divided by 10 and multiplied by 0.5. The pump discharge pressure is indicated in the technical data sheet (in meters).

Where is it installed

Mount the circulation pump in such a way that access to it is subsequently free. After all, like any other equipment, it can fail. In this case it will be necessary to repair or replace it.

Installation of the circulation pump in an open heating system (as well as in a closed system) is performed on the return pipe. In this case, not such a hot coolant will pass through it. This can significantly extend its service life. On the supply line, you can put only the latest models, made of materials resistant to high temperatures.

Mount the pump in an open heating system best on bypass. Such a scheme is most convenient. When the power is turned off, the system can simply be switched to the natural circulation mode.

In closed heating systems, a circulating pump is usually installed in the immediate vicinity of the expansion tank. In the open it can be put anywhere. But the best option is still the installation next to the boiler.

What else do I need to purchase

In addition to the pump itself, the owners of the house will have to buy a coarse filter. This equipment is installed on the bypass just before the pump itself. It is necessary to cut it. Otherwise, the impeller will quickly be blocked with silt or scale. Water even in very clean wells contains various kinds of impurities. In addition, the owners of the house, who decided to perform such a procedure as installing a circulating pump in an open type heating system, should be purchased:

• Stop valves. We need two quality ball valves corresponding to the pump capacity (3/4 or 1) and one with a diameter equal to the same return rate.
• American, 2 end pieces necessary to insert a crane into the main and two under the pump itself.
• Pakluk, fixing clamps for cranes, nipple for filter.

Installation step by step

Installation of the circulation pump in the heating system begins with the evacuation of the coolant. Then the installation is done like this:

• A tap is put into the return pipe.
• Perform the actual operation, such as assembly of the pump assembly. In the heating system it must be built in strictly horizontal (shaft location). Also, during installation, make sure that the terminal box is located on top. For installation, take the ball valve and wind up on its thread a patch, paint it with paint and screw the filter.
• The nipple and the plug-in connection, which comes complete with the pump, are wound in series.
• A connection is wound on the second tap through the patch.
• Then the second part of the connections is installed on the pump.
• After the pump assembly is assembled, it is possible to proceed with its installation in the pipeline. For this purpose, the pipe segments are inserted into the cranes located on both sides.
• The whole structure is attached to the main line so that the crane inserted into it is in the middle. Further on the pipe marks are made, on which the holes are cut. In them, and you need to weld bends.
• At the final stage, the system is filled with water and its crimping is carried out.

The diagram of the installation of the circulation pump in the heating system is shown in the figure below.

Expansion tank

This element is always used in the heating system. After all, the volume of water pumped into the main line during its heating and cooling can vary considerably. In systems with natural circulation, usually open-type tanks are installed. They cost less membranes and quite well cope with their task. In this regard, the owners of private homes may raise the question of whether to change this element when performing such an operation as the installation of a circulating pump in a heating system with natural coolant flow.

With a lack of funds, you can leave it as it is. However, it is better to replace the tank. Membrane structures in comparison with conventional have such advantages:

• They are installed in the immediate vicinity of the boiler, and not in the attic, which, of course, facilitates the maintenance of the system.
• When using a tank of this design, the contact of the coolant with air is completely excluded. Consequently, the internal parts of the system (boiler, pump, etc.) oxidize less and last longer.
• When using a circulation pump, home owners have the possibility of creating excess pressure in the system. This is done so that the radiators do not accumulate air. If an open type tank is included in the system design, this becomes impossible.

Rules of operation

So, the technology of carrying out such a procedure, such as the installation of a circulating pump in the heating system by our own hands, has been examined in full detail. As you can see, this operation is not too difficult.

However, no matter how carefully the pump was installed, if the operation rules are not observed for a long time, it will not last. To extend its service life, experts advise to adhere to the following recommendations:

• Do not turn on the device when there is no coolant in the system.
• The volume of water in the pipes must be kept within the performance of the pump.
• In the event that the device will be idle for a long time, it should be started from time to time. You need to do this once a month for about fifteen minutes.
• Do not allow heating of the coolant above +65 degrees.

Inspection of the pump

Installation of the circulation pump in the heating system (the photo of the most suitable equipment and the process of its insertion are presented on the page), thus - a procedure that can be performed independently. If the installation technology is strictly observed, the heat transfer medium will operate smoothly. But only in case of his periodic inspections. And this operation should be at least once a month. The order of inspection of the pump is as follows:

• The device is connected to the network and checked for any foreign noise.
• Check the pressure of the coolant.
• The temperature of the pump is checked.
• Screw flanges are inspected and, if necessary, lubricated.
• The presence of earth between the housing and the terminal is checked.
• The pump is inspected for leaks.
• Inspected terminal box.

The correct installation of the circulation pump in the heating system and the owners' compliance with all the rules of its operation is a guarantee that he will serve for many years with faith and truth, and life in the house will be comfortable, including during the winter season.