Connection
Using the central screw, remove excess air from the pipes.
If the work is carried out correctly, liquid will begin to ooze from the special hole. For a manually operated pump, you should bleed the air before starting work: turn it on for a couple of minutes and open the valve, repeating the steps a couple of times. The pump unit is connected after the system is started, when the pipes are filled and all air has been released. This must be done before each startup of the device.
In systems with natural circulation, when connected to the electrical network, a circuit breaker is used so that the circuit can be disconnected. It is installed at a distance from the boiler of at least 0.5 m.
In designs with forced circulation, the device begins to operate when the thermal relay is turned on. When installing an additional pump into the heating system of a house, it is necessary that it and the built-in device work simultaneously. To do this, also connect the new unit to the relay or to the built-in parallel one.
If you have an electric boiler, connect the pump directly to it. This will allow the circulation device to operate only when the water is heated.
Safe operation of the circulation unit is possible when using a grounded socket.
Independent installation of a pump in a home heating system is only possible if you follow all installation rules and take into account the nuances of connection.
This issue should not be taken lightly, relying on “maybe”, so as not to put your family at risk. Accurate adherence to all requirements will ensure your home is warm and comfortable.
Answers from experts
Alexei:
It is logical that a hydraulic gun needs to be made.
Use a hydraulic separator to decouple the boiler-pump circuit of the boiler and the heating system from its own pumps.
Vladimir Kolpakov:
The standard pump on the boiler is always in the return line. sequential operation of pumps is not desirable. But in general I’m interested in what the problem is, what makes me install additional. pump
Vladimir Petrov:
The Weiland boiler already has a pump and it is quite enough. And there is no need to install another pump. The boiler is designed for a certain heat flow and there is no need to increase it.
Fursov Yuri:
Or maybe remove the filter and clean it? and that's where it all ends
husky:
or better yet, install two pumps... and so that they work towards each other... then you don’t have to worry about how to connect to the standard
Onotole Chake:
There seems to be a return line there, which is sufficient along with the standard pump. If in doubt, ask on some thematic site then
Semyon Arazaev:
There is no point in this at all, given that there is more than enough return there. Well, some kind of quick burst is basically normal, but this needs to be clarified with a specialist in these same boilers from s pechki
Egorych:
Underfloor heating is not done like that, you need a thermostat and a separate pump, well, something like that
Grandfather Au:
The pump is usually placed on the return line
Vladimir:
What's the question?
Dmitriy:
it all depends on the connection diagram, without knowing that you won’t hear any useful advice...
Drifter of the Seas:
Read the DHW consumption in the passport of your water heater; if you have more water consumption than the water heater can heat, then your hot water will be cool
Alexey Lesyuk:
Vitaly, if your heating system was installed incorrectly, installing an additional pump will not help you, and will also harm you if the boiler is a double-circuit one. It is necessary to change the connection diagram of the boiler to the heating system to install additional. nasoa
Installation technology
Installing a circulation unit is a process that requires compliance with a certain sequence of work.
Preparation
Experts recommend purchasing a pump with split-type threads. If they are not available, then you need to buy these parts additionally. You will also need a deep cleaning filter.
Before installation, prepare a check valve: this normalizes the operation of the heating system.
You will also need special keys, fittings, a small pipe with a diameter equal to the diameter of the riser.
Place
Modern circulation pumps can be installed both on the water supply pipe and on the return pipe.
Installation carried out on the bypass (a jumper or a piece of pipe installed between the direct and return wiring of the heating radiator) requires preliminary testing of the device’s ability to withstand strong pressure of hot water.
If there is a membrane tank, the bypass with the pump is placed on the return pipeline, closer to the expansion tank.
Installation
The heating system can be made of metal or ecoplastic. There is no difference for the installation of pumping equipment. It is inserted by going around it. If the pipeline is made of metal, then you can purchase a ready-made structure to bypass the main line.
First you need to drain the water and clean the heating structure, rinsing it several times.
Then, according to the diagram, a U-shaped piece of pipe is mounted on the side of the main pipe, in the middle of which a pump is built. Ball valves must be installed on both sides of this unit. What is it for?
Firstly, the natural circulation of the coolant will be restored if one of them is closed. Secondly, you can repair or replace the circulating equipment if you turn off both taps, without needing to drain the water from the system.
After this, the system is filled with coolant and checked for functionality. Any errors should be corrected at this stage.
Then, unnecessary air is removed from the pipeline using a central screw. If everything is done correctly, liquid will begin to leak out of the special hole.
Pumping equipment with manual control requires air to be removed before starting work: it is turned on for a few minutes and the valve is opened, this is repeated several times.
After the pipes are filled with water, the pumping device will turn on. The presence of air in the pipeline is excluded.
Additional pump in the home heating system: is it necessary and where to install it?
One of the main types of equipment used in the heating system of a private home is a circulation pump. This device allows you to transport coolant through the system more efficiently, which will contribute to uniform heating of the premises. In our article we will describe why an additional pump is needed in the heating system of a house, we will get acquainted with the diagram and location of its installation, and its use in the Warm Floor system.
Is it necessary, and in what cases?
Many owners of country real estate, and especially two-story houses, are interested in the question of installing an additional circulation pump in the heating system. They come to this conclusion after uneven heating of the radiators in the rooms, provided that the boiler has sufficient power. If the temperature difference between the boiler and the coolant in the pipelines exceeds 20 degrees, then it will be necessary to remove air plugs or set the existing pump to an increased speed.
Installation of additional pumping equipment is necessary in the following cases:
- When adding an additional circuit to the heating system, and especially when the pipe length exceeds 80 meters;
- For uniform movement of coolant in pipelines.
Before installing an additional pump, balance the heating system using balancing valves
An additional pump in the heating system may not be needed if it is balanced using balancing and control valves, so before purchasing additional equipment, bleed the air from the radiators and add water to the system. If everything works fine, then there is no point in installing an additional pump.
Where to put
In the autonomous heating system of a private house, it is recommended to install circulation pumps with a wet rotor, which rotate without the use of special lubricants. The coolant and lubricating element here are the coolant. When installing such a device, the following rules must be taken into account:
- The pump shaft must be in a horizontal position relative to the floor surface;
- The movement of water flow in the system must coincide with the direction of the arrow on the device;
- To prevent liquid from entering the pump terminals, the box should be installed on the top or side of the equipment.
Correct installation of an additional pump in the home heating system
According to some users, it is better to install the pump on the return pipeline. Here the coolant temperature is minimal, which will increase the service life of the device, but not all experts agree with this statement. The fact is that the pump is designed for operation in a coolant environment whose temperature can reach 110 degrees.
Installation diagram
In practice, two schemes for installing a circulation pump are used in a single-pipe and two-pipe heating system. Before carrying out installation work, you must carefully study the attached instructions. At the preparatory stage of work, water is drained from the system and the pipes are cleaned of contamination by additional pumping of liquid. The pump is installed according to the attached diagram, then coolant is poured into the circuit and the unit is turned on.
As we have already said, it is best to install the pump on the return side using a tap or, as it is also called, a bypass. Such a device is necessary to shut off the water and replace the pump in case of breakdown. The diameter of the outlet pipe should be smaller than that of the central pipeline.
Installation diagram of an additional pump in the heating system
At each edge of the bypass, before entering and after exiting the pump, taps are installed for emergency shut-off of the coolant. Another valve is installed on the central line to direct the flow of liquid through the pump. Before entering the pumping equipment, a special filter is attached that will accumulate harmful particles in the water.
With warm floor
Installation diagram of the pump in the “Warm Floor” system
When filling the system with coolant, it is not always possible to get rid of the air present here. Accumulated gases often block the movement of fluid, and not every manifold can be used as a relief valve. To solve this problem, the circulation pump has a special outlet valve made in the form of a disk.
To release accumulated gases, you need to turn this part with a screwdriver counterclockwise. After supplying water from the slot, the disk is tightened and the pump is started again. A similar procedure is repeated several times in a row.
Installation nuances
When installing turnkey heating, a master plumber installs a circulation pump with a wet rotor. Such a device does not create much noise; its rotor rotates without lubrication. Coolant is used here as a coolant and lubricant. When installing pumping equipment, you need to take into account the following nuances:
- The shaft of the pressure-injecting device is positioned horizontally relative to the floor plane.
- Carry out installation in such a way that the direction of water coincides with the arrow on the device body.
- Install the device with the terminal box facing up, which will prevent water from entering the electronics.
Important! Experts recommend installing the pump on the return pipeline of the heating system of a single-story or multi-story residential building. Despite the fact that such equipment is designed to operate in hot water with temperatures up to 110 degrees, warmer liquid in the return pipeline will only extend its service life.
Installation of the unit is carried out only after draining the water from the system. If there is a power outage, the pump will not be able to pump the coolant, so it is connected through a bypass, and a mesh filter is installed in front of the inlet pipe to prevent scale and debris from getting onto the impeller. In addition, shut-off valves are provided at the input and output of the device for possible replacement and repair of the device.
As we can see, installing a circulation pump requires certain skills, so the installation of this equipment must be carried out by a professional. To order a service, you can leave a request on the website or call the number
Types of additional pumps - choosing the appropriate unit
For efficient media circulation, it is best to use “wet” or “dry” pumps. In the first case, the rotor is located inside the coolant, that is, it pumps water while being directly in it. As the fluid circulates, it cools the engine. A stator is used to supply electricity. Wet pumps have many advantages. Firstly, they are able to last for a fairly long period of time. Secondly, such devices do not require frequent maintenance. Thirdly, they make less noise. And fourthly, they are not large in size.
Disadvantages include not very high efficiency, limited scope of use, and the inability to use pumps for drinking water and other food-related devices. Such units are used only in mansions and residential high-rise buildings.
In the design of dry-type pumps, the rotor is located outside the coolant. Such devices use a seal that is designed to separate the motor and the pump itself. The approximate efficiency of the equipment is 75%, which is why these units are used in situations where it is necessary to regularly pump large amounts of water. Such units are used more in manufacturing and shopping centers than in residential buildings.
Which pump to choose
Unlike the standard VAZ and GAZ pump, which has a mechanical belt or chain drive, an electric pump is used as an additional driving force. Most often, motorists use an electric pump, which is standard equipment on the Gazelle car.
The unit has high performance, but the quality of its manufacture leaves much to be desired. Therefore, before installing such a pump, it is recommended to disassemble it, coat all seals with automotive sealant, reassemble it and let it dry for 24 hours.
Note: the above applies to old-style pumps. New GAZ pumps have good build quality. However, over time, they also begin to leak.
An alternative to GAZ products is to install an additional pump manufactured by Bosh. These units have high build quality and a different operating principle. The blade rotates under the action of a magnetic coupling, and not an electric motor, as in the first case. » alt=»»> By using such a scheme, the manufacturer was able to abandon sealing connections and almost completely eliminate the possibility of leakage. The disadvantages of the imported unit include its high cost and relatively low productivity (700 liters versus 1200 liters per hour for the GAZ unit).
Where to put
It is recommended to install a circulation pump after the boiler, before the first branch, but on the supply or return pipeline it doesn’t matter. Modern units are made from materials that can withstand temperatures up to 100-115°C. There are few heating systems that work with a hotter coolant, so considerations of a more “comfortable” temperature are untenable, but if you feel safer, put it in the return line.
Can be installed in the return or direct pipeline after/before the boiler up to the first branch
There is no difference in hydraulics - the boiler, and the rest of the system; it makes absolutely no difference whether there is a pump in the supply or return branch. What matters is the correct installation, in terms of strapping, and the correct orientation of the rotor in space
Nothing else matters
There is one important point regarding the installation location. If the heating system has two separate branches - on the right and left wings of the house or on the first and second floor - it makes sense to install a separate unit on each, and not one common one - directly after the boiler. Moreover, the same rule remains on these branches: immediately after the boiler, before the first branch in this heating circuit. This will make it possible to set the required thermal conditions in each part of the house independently of the other, and also in two-story houses to save on heating. How? Due to the fact that the second floor is usually much warmer than the first floor and much less heat is required there. If there are two pumps in the branch that goes up, the speed of movement of the coolant is set much lower, and this allows you to burn less fuel, without compromising the comfort of living.
There are two types of heating systems - forced and natural circulation. Systems with forced circulation cannot work without a pump; systems with natural circulation work, but in this mode they have lower heat transfer. However, less heat is still much better than no heat at all, so in areas where electricity is often cut off, the system is designed as hydraulic (with natural circulation), and then a pump is installed into it. This gives high heating efficiency and reliability. It is clear that the installation of a circulation pump in these systems is different.
All heating systems with heated floors are forced - without a pump, the coolant will not pass through such large circuits
Forced circulation
Since a forced circulation heating system without a pump is inoperative, it is installed directly into the gap in the supply or return pipe (of your choice).
Most problems with the circulation pump arise due to the presence of mechanical impurities (sand, other abrasive particles) in the coolant. They can jam the impeller and stop the motor. Therefore, a mesh dirt filter must be placed in front of the unit.
Installing a circulation pump in a forced circulation system
It is also advisable to install ball valves on both sides. They will make it possible to replace or repair the device without draining the coolant from the system. Turn off the taps and remove the unit. Only that part of the water that was directly in this piece of the system is drained.
Natural circulation
The piping of the circulation pump in gravity systems has one significant difference - a bypass is required. This is a jumper that makes the system operational when the pump is not working. One ball shut-off valve is installed on the bypass, which is closed the entire time the pumping is running. In this mode, the system operates as forced.
Installation diagram of a circulation pump in a system with natural circulation
When the electricity goes out or the unit fails, the valve on the jumper is opened, the valve leading to the pump is closed, and the system operates as a gravity system.
Installation features
There is one important point, without which the installation of the circulation pump will require rework: it is necessary to rotate the rotor so that it is directed horizontally. The second point is the direction of flow. There is an arrow on the body indicating which direction the coolant should flow. This is how you turn the unit so that the direction of movement of the coolant is “in the direction of the arrow”.
The pump itself can be installed both horizontally and vertically, just when selecting a model, make sure that it can work in both positions. And one more thing: with a vertical arrangement, the power (pressure created) drops by about 30%. This must be taken into account when choosing a model.
Advantages of pump heating
Not so long ago, almost all private houses were equipped with steam heating, which was powered by a gas boiler or a conventional wood stove. The coolant in such systems circulated inside the pipes and batteries by gravity. Only centralized heat supply systems were equipped with pumps for pumping water. After the appearance of more compact devices, they also began to be used in private housing construction.
This solution provided a number of advantages:
- The coolant circulation rate has increased. The water heated in the boilers was able to flow much faster into the radiators and heat the rooms.
- The time it takes to heat homes has been significantly reduced.
- An increase in flow rate entailed an increase in the circuit capacity. This means that smaller pipes can be used to deliver the same amount of heat to its destination. On average, the pipelines were reduced by half, which was facilitated by the forced circulation of water from an embedded pump. This made the systems cheaper and more practical.
- In this case, to lay highways, you can use a minimum slope without fear of complex and extended water heating schemes. The main thing is to choose the right pump power so that it can create optimal pressure in the circuit.
- Thanks to household circulation pumps, it has become possible to use heated floors and closed systems of high efficiency, the operation of which requires increased pressure.
- The new approach made it possible to get rid of many pipes and risers, which did not always fit harmoniously into the interior. Forced circulation opens up possibilities for laying circuits inside walls, under floors and above suspended ceiling structures.
A minimum slope of 2-3 mm per 1 m of pipeline is necessary so that in the event of repairs, the network can be drained by gravity. In classic systems with natural circulation, this figure reaches 5 or more mm/m. As for the disadvantages of forced systems, the most significant of them is the dependence on electrical energy. Therefore, in areas with unstable electricity supplies, it is necessary to use uninterruptible power supplies or an electric generator when installing a circulation pump.
You should also be prepared for an increase in bills for consumed energy (with the correct selection of the power of the unit, costs can be minimized). In addition, leading manufacturers of equipment for heating systems have developed modern modifications of circulation pumps that can operate in increased economy mode. For example, the Alpfa2 model from Grundfos automatically adjusts its performance depending on the needs of the heating system. Such equipment is quite expensive.
Hydraulic separator
If there is a need to install an additional pump, then another device must be included in such a heating system - a hydraulic separator. In the list of terms used, a hydraulic separator can also be called an anuloid or a hydraulic arrow.
Operating principle of hydraulic separator
Such devices are recommended for use in heating systems where the coolant is heated using long-burning boilers. The fact is that the heating devices in question can operate in several phases (fuel ignition, combustion process and attenuation), and for each of these phases it is necessary to maintain a certain combustion mode.
Installing a hydraulic needle in the heating system allows you to create a certain balance in the operation of heat and warming up the system. The anuloid itself is made in the form of a pipe with four outlet pipes. The main functions of such a device include:
- Automatic removal of accumulated air;
- Collecting sludge particles (works as a dirt trap).
Note! From these characteristics it can be understood that the hydraulic separator is considered an important device in the heating system, so it must be installed without fail if there is a pump. Hydraulic separator in the heating system
Hydraulic separator in the heating system
Heating in a private house performs many functions that must be implemented regardless of coolant flow and possible pressure drops in the pipelines. It is quite difficult to achieve efficient operation of the system, because the liquid enters the pipeline circuits from one source of thermal energy - the boiler, which will ultimately lead to unbalanced heating. To prevent such situations, the hydraulic separator serves; it performs the function of decoupling.
Options
Installation of this equipment requires taking into account its parameters, pipe diameter, pressure and water temperature, and coolant density.
N - designation of pressure, the ability of the device to raise liquid to a certain level. The parameter is measured in meters. Q – fluid flow in the heating system for a certain period of time, calculated in m3. This value is equal to the boiler power parameter. The coolant flow depends on the diameter of the pipes.
Circulation equipment is not designed to lift water, therefore, when purchasing it, you need to pay attention specifically to parameter Q. If the boiler is not equipped with a pump, then the liquid flow must be calculated. A similar unit is already built into modern heating devices.
Additional pumping equipment is installed if the boiler is of an old modification, the heating design has been increased due to the expansion of the area of the house.
There is no point in buying a high-power unit: they will not use it at full capacity anyway. In addition, such a device is too noisy. The length of the pipeline determines the power of the injection equipment: for every 10 m of pipeline, 0.6 m of pressure is required from it. A ring 100 m long will work efficiently and productively at a pump head of 6 m.
When purchasing pumping equipment, you need to remember that its power should be 10% more than the calculated value.
Heating system wiring diagrams
When building a line of presentation for a quick understanding of the organizational features of certain heating systems, it is reasonable to start with the option with forced circulation.
With forced circulation
This scheme has a number of features.
- Height differences, pipe slopes, and the location of radiators relative to the heating boiler are not regulated in any way.
- The system uses multi-point technology or a single-point air exhaust system (Mayevsky taps on heating radiators or one outlet point with the highest level of height).
- It is possible to organize as many isolated circulation circuits as desired, each of which is served by a separate pump.
The main distinguishing feature of a system with forced circulation is that its operation is impossible without the functioning of the circulation pump. Therefore, when the power is turned off, the coolant stops and the rooms are not heated.
With natural circulation
A natural circulation system has a number of advantages, but requires strict adherence to the rules of the organization. Its features are as follows.
- After the heating boiler, an accelerating line is provided, a vertical pipe that allows creating pressure as the coolant expands for its movement through the network.
- A clear slope parameter is regulated for both the supply and return pipes.
- With several heating circuits, it is difficult or impossible to achieve optimal heat transfer in each of them.
Controlling a circulation pump for the movement of coolant can dramatically increase the functionality, efficiency, and customizability of a heating system with natural circulation.
This system allows you to solve a number of standard problems:
- level out design errors and overcome hydraulic resistance of the pipeline network;
- optimize the loading of heating circuits when installing several pumps, regulate heat output;
- improve operating conditions of heating equipment.
The main advantage of a system with natural circulation, despite all the complexity of its organization, is the ability to work when the power supply is turned off. To achieve this, the circulation pump is installed in the bypass. This is a fairly simple structure.
The bypass is a separate unit for installing a circulation pump with a bypass loop and shut-off valves for maintenance.
The bypass assembly provides several convenient features.
- When the ball valves are closed, the blower can be removed without draining the entire system in order to repair the circulation pump or replace it.
- The system operates without power supply.
- It is possible to carry out the initial heating start without the participation of a circulation pump.
- It is easy to organize a structure to protect the pump from impurities entering its turbine by installing a coarse filter or a mesh-type unit.
The water heating circuit of a private house can use either a manual or automatic bypass. In the latter case, a check valve is installed in the circulation pump bypass circuit.
When the circulation pump operates, excess pressure forms at the outlet of the check valve. The unit shuts off the supply, providing an optimal flow pattern for the coolant. When the power is turned off, water begins to move through the valve due to the natural gravitational component. This scheme does not require adjustment or configuration, including during commissioning.
Advice! Since the check valve is a device quite sensitive to the ingress of scale and mineral deposits, in open heating systems it is recommended to duplicate its operation with a sequentially installed ball valve.
Navien Delux Coaxial device
The word Coaxial in the name of the boiler means the use of coaxial chimneys (pipe in pipe). This system is convenient in that only one pipe is used to supply air to the combustion chamber and remove exhaust gases, which can be led from the room to the street by the shortest route. In general, the boiler is not fundamentally different from products from other brands. You can note the convenient location of the expansion tank and the non-standard location of the fan - it is located below the burner.
It is noteworthy that Navien boilers do not have a built-in control panel. All adjustments are made using a separate control panel. The remote control is also equipped with a temperature sensor and displays various information about the operating status of the equipment and will report a malfunction with an error code. A special feature of Navien is also the presence of an air pressure sensor, which not only performs a draft check function, but also sends data to the control unit for portion control and determines the presence of reverse draft. If there is excess pressure in the chimney, for example due to wind blowing, the gas supply to the burner will be stopped and the boiler will stop.
At the bottom of the boiler there are inlets and outlets of the heating and hot water circuits, a make-up tap, a drain plug, a cleaning filter and a safety valve for relieving excess pressure.
