At the moment, many private homes still use the old type of heating system - open. In such networks, heated water flows through pipes by gravity due to thermal expansion, which is not very convenient. Radiators distant from the boiler in such systems heat worse than their neighbors. As a result, heat is distributed unevenly about the house. A way out of this situation may be a tie-in to the circulation pump system. Such equipment costs are not too expensive and consumes little electricity. The benefit from it is enormous. Installing a circulation pump in a heating system is a simple operation, and can very well be done with your own hands.
Device
You can buy a pump in any store specializing in the sale of equipment for various kinds of engineering systems. Its construction is quite simple. An electric motor is placed in a stainless steel case. An impeller is fixed on its shaft. She also distills water through pipes.
Varieties
There are two types of circulation pumps:
- "Dry." This type is most often installed in heating systems of multi-storey buildings. Such pumps are very noisy and are very powerful. They are usually installed in separate rooms.
- “Wet.” For such pumps, the rotor rotates directly in the water. This is not too powerful, "quiet" equipment. In that case, if the owners of a country house have decided that installing a circulation pump in the heating system of a private house is a necessary thing, they should consider buying such a model.
How to choose
When buying a circulation pump, you should first pay attention to such a parameter as the output pressure. Defining it is very simple. To do this, the total length of the water supply needs to be divided by 10 and multiplied by 0.5. The pressure delivered by the pump is indicated in the technical data sheet (in meters).
Where is 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 need repair or replacement.
Installation of the circulation pump in an open heating system (as well as in a closed) is carried out on the return pipe. In this case, not so hot coolant will pass through it. This can significantly extend its life. Only the most modern models made of materials resistant to elevated temperatures can be installed on the supply line.
It is best to install the pump in an open heating system on the bypass. Such a scheme is most convenient. With a power outage, the system can simply be switched to natural circulation mode.
In closed heating systems, the circulation pump is usually installed in the immediate vicinity of the expansion tank. In open, you can put it anywhere. But the best option is still considered installation next to the boiler.
What else do you 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 immediately in front of the pump itself. Embed it should be. Otherwise, the impeller will quickly become clogged 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 circulation pump in an open heating system , need to purchase:
- Stop valves. You will need two high-quality ball valves corresponding to the pump capacity (3/4 or 1) and one with a diameter equal to the same indicator of the return line.
- American, 2 trailer, necessary for inserting the crane into the highway and two under the pump itself.
- I tow, fixing collars for cranes, a nipple for the filter.
Installation step by step
Installation of the circulation pump in the heating system begins with the pumping of the coolant. Further installation is carried out as follows:
- A tap is inserted into the return pipe.
- Actually carry out such an operation as the assembly of the circulation pump assembly. It must be installed in the heating system strictly horizontally (shaft location). Also, during installation, make sure that the terminal box is located on top. To install, take a ball valve and wrap tow on its thread, coat it with paint and screw on the filter.
- The nipple and the detachable connection that comes with the pump are screwed in sequentially.
- The connection is screwed onto the second tap through the tow.
- Next, the second parts of the connections are installed on the pump.
- After the pump unit is assembled, you can proceed with its installation in the highway. To do this, pipe pieces are inserted into the taps located on both sides of it.
- The whole structure is attached to the highway in such a way that the crane embedded in it is in the middle. Next, marks are made on the pipe along which holes are cut. They need to weld the bends.
- At the final stage, the system is filled with water and pressure testing is carried out.
The installation diagram of the circulation pump in the heating system is shown in the figure below.
Expansion tank
This element in the heating system is required. After all, the volume of water pumped into the highway during its heating and cooling can vary significantly. In systems with natural circulation, usually open type tanks are installed. They cost less than membrane and quite well cope with their task. In this regard, the owners of private houses may have a question about whether this element should be changed when performing such an operation as installing a circulation pump in a heating system with a natural coolant current.
With a lack of funds, you can leave everything as it is. However, it is better to replace the tank. Membrane designs, compared with conventional ones, have the following 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 eliminated. Consequently, the internal parts of the system (boiler, pump, etc.) oxidize less and last longer.
- When using a circulation pump, home owners can create excessive pressure in the system. This is done so that air does not accumulate in the radiators. If an open tank is included in the system diagram, this becomes impossible.
Terms of Use
So, the technology for carrying out such a procedure as installing a circulation pump in the heating system with our own hands, we have examined in detail. As you can see, this operation is not too difficult.
However, no matter how neatly the pump is installed, if the operating rules are not followed, it will not last long. To extend its life, experts advise to adhere to the following recommendations:
- Do not turn on the device if there is no coolant in the system.
- The volume of water in the pipes must be kept within the operating characteristics of the pump.
- In the event that the device will be idle for a long time, it should be run from time to time. This should be done once a month for about fifteen minutes.
- It is impossible to allow heating of the heat carrier above +65 degrees.
Pump inspection
Installing a circulation pump in the heating system (photos of the most suitable equipment and the process of its insertion are presented on the page), thus - a procedure that can be performed independently. With strict observance of the installation technology, the heat transfer pump will work smoothly. But only in the case of periodic inspections. Moreover, this operation should be performed at least once a month. The pump inspection procedure is as follows:
- The device is plugged in and checked for extraneous noise.
- The coolant pressure is checked.
- Checks the heating temperature of the pump.
- Threaded flanges are inspected and, if necessary, lubricated.
- Grounding between the case and the terminal is checked.
- The pump is inspected for leaks.
- The terminal box is inspected.
Correct installation of the circulation pump in the heating system and compliance by the owners with all the rules for its operation is a guarantee that it will serve faithfully for many years, and life in the house will be comfortable, including in the winter.