Heating pump: installation of a circulating pump in the heating system
Such device allows to increase efficiency of work of autonomous systems of heating of country houses and country houses., as a circulating pump for heating. Installation of this pump in the heating system is not particularly difficult, therefore perform the following procedure, having at least minimal skills in working with technical devices, you can do it yourself, without the involvement of qualified specialists.
Circulation pump in the heating system
Purpose of circulating pumps
Main task, which is solved by circulating pumps for heating boilers, is, to ensure constant movement through the pipeline of heat transfer fluid without changing the flow pressure. So, constantly moving along the pipeline at a certain speed, heated water promotes better heat transfer of heating system elements and, in accordance, faster and more efficient space heating.
Installation of a circulating pump in the heating system, operating on the principle of forced recirculation, is a must. In heating systems with natural circulation of the heat carrier to increase their thermal capacity, such devices are also installed. Many modern models of circulating pumps can operate at different speeds and are equipped with a special switch, which allows you to select the desired mode of operation.
Using adjustable circulating pumps, you can effectively control the operation of the heating system, including it to the maximum level of heat transfer, when it was very cold outside, and exposing the economic mode of operation thereafter, how comfortable air temperature will be established in heating rooms. Some models of adjustable pumps for boilers can work in auto mode, reacting to changes in air temperature in heating rooms and switching to the required speed of coolant supply to the pipeline system.
Device of circulating pumps for heating
Circulating pumps by design, installed on heating systems, are divided into two major categories: with "dry" and "wet" rotor. Devices with a "dry" rotor have higher efficiency and productivity, but they make a lot of noise when working, more difficult to maintain and repair. Hydraulic machines with a "wet" rotor are easy to maintain and highly reliable, if the required quality of the coolant is provided, are able to serve without failure for more than ten years.
in addition, circulating pumps of this type emit a minimum amount of noise during operation. Even low efficiency and performance of pumping devices with a "wet" rotor is enough for that, to ensure the efficient operation of the heating system of a private house or country house.
How to choose the right place to install
Before installing the circulation pump, it is necessary to determine the most suitable place for installation. Usually such a pump in the heating system is mounted after the boiler, on the pipeline section, located before the first branch. There is no significant difference, on which of the highways (submits or reverse) the pipeline is installed pump for heating. Manufacturers use materials to make circulating pumping equipment, which are able to withstand the temperature of the water in the system, coming to 100-115°, therefore installation of such device even on the direct pipeline, where the coolant temperature is maximum, will not harm him. On the hydraulic characteristics of the heating system and all elements, which are included in it, also does not have any negative impact then, on which of the pipelines the installation of the circulating pump is performed.
How to install a heating pump? The main attention should be paid to that, how the pumping is done and how the rotor is oriented. In heating systems, consisting of two separate branches (contours), each of which works to heat different parts of the house or its floors, it is better to put two circulating pumps - on each of circuits separately. The scheme of installation of circulating pumps on each of the branches of the heating system is left the same - immediately after the boiler and before the first branch on the pipeline.
The use of a separate pump for each of the branches of the heating system allows you to adjust the heat transfer of each of these heating circuits, creating the necessary temperature indoors, which are served by such circuits.
Heating system with double-circuit boiler and underfloor heating
In that case, if the first and second floors of the house are serviced by separate heating circuits, the use of two circulating pumps will also save on heating the building. This is the saving, that to heat the upper floors, where the air temperature is always higher, requires less thermal energy from the heating system. In accordance, circulating pump, serving heating circuit of the upper floors, can be set to a lower speed, which will save on energy, used to heat water in the boiler.
wiring diagrams
The connection diagram of the boiler pump depends on the type of heating system, on which such a device is installed. As mentioned above, allocate heating systems with forced or natural circulation of the heat carrier. The first ones simply do not work without such pumping equipment, others work, but are characterized by low heat transfer. Usually, heating systems, which can function as a circulating pump, and without him, used to equip homes, located in those areas, where there are frequent power outages. The use of such combined options allows you to store heat in the house regardless of the voltage in the centralized power supply. In those cases, when electricity does not enter the house, heating system, although with less heat dissipation, works without a circulating pump.
Installation in heating systems with forced circulation of the heat carrier
Installation of the pump in the heating system of a private house, which was originally designed with the use of such a device in mind, performed in the rupture of the pipe, supply or return circuit path. A very common cause of improper operation of the circulation pump and even its failure is the low quality of the coolant, the presence in its composition of sand and other insoluble impurities. This reason is especially characteristic of those cases, when an open heating system is used to heat the house.
Typical heating pump connection diagram
Solid insoluble particles, contained in the coolant, often cause impeller jamming and subsequent shutdown of the drive motor. In order not to face such problems, on the pipeline section, through which the coolant enters the pump, a coarse strainer must be installed.
For correct installation of the circulating pump in the heating system installation of ball valves on both sides of such device is necessary. These cranes are needed for that, so that the coolant does not drain from the entire pipeline during maintenance or repair of the pump.
Installation in heating systems with natural circulation of the heat carrier
To install the boiler pump, serving system with natural circulation of the heat carrier, be sure to use bypass. This is a pipe jumper, on which the coolant moves in the heating system in those cases, when the electric pump installed on it does not work.
Heating bypass scheme
A ball-type crane is mounted on the bypass, which during normal operation of the circulating pump is in the closed state. In those cases, when the hydraulic machine for any reason does not work and, in accordance, can not provide the necessary circulation of the coolant, the crane on the bypass is opened, and on the pipe section, which goes to the pump, close. So, the pump is cut off from the heating circuit, and the coolant begins to move on it naturally.
features of installation
Concerned about it, how to properly install the pump, which will ensure efficient circulation of the coolant in the heating pipes, a number of other important nuances should be taken into account. The first of these nuances is, that the rotor of the pumps during their installation must be strictly horizontal. This requirement is explained by those, that only at such arrangement of the pump with a "wet" rotor all moving elements of its internal design will effectively lubricate and, in accordance, will be able to avoid excessive friction and overheating.
Options for correct and incorrect installation of the heating pump
The second moment, which should be taken into account, installing a recirculation pump for heating, - is the direction of flow of the coolant in the pipeline. There is an arrow on the body of any circulating pump, which indicates, which indicates. which indicates, which indicates, easy: which indicates, which indicates, which indicates. It should be borne in mind, which indicates, which indicates.
When choosing a circulating pump to equip your heating system, keep in mind, that some models of such devices can be installed both horizontally, and in the vertical position. In the latter case, the pump may lose up to 30% pressure, which is formed in the discharge line.
Connect the device to the mains
When connecting the pump to the mains, for which it is necessary to use three wires (phasic, neutral and ground wire), it is better to use an individual line, equipped with automatic protection.
The scheme of connection of the circulating pump to the mains
The connection of the circulation pump is carried out by means of a standard three-contact plug and the socket or by means of a terminal block. Pump terminals, to which you need to connect the back end of the electrical cable, are under a plastic cover on the device case. Usually, each of these terminals has a designation, which allows you to easily understand it, which wire to connect to a specific terminal.
Many owners of country houses, so as not to find yourself in a situation, when the heating system stops working due to power outages, use backup power sources, to which in case of emergencies in the centralized power supply network the circulating pump is connected.
