Pump for underfloor heating: description and connection features

Water warm floors are popular due to low cost at the time of operation. This is especially important for large areas. The process of installation is not cheap. It is important to observe some technical features. Including a pump for the warm floor. What kinds of them exist, and also connectivity features we will consider in more detail.

Device design

Any pump for floor heating is sold with the following set of parts:

• Housing. Material of special strength metal. The body has nozzles for the inlet and outlet of the coolant.
• Rotor or motor. It is fixed to the body. It takes the intake and ejection of liquid under pressure.
• Impeller. Sets the direction of movement of the coolant in the system.
• Air vent or nut. Serves to remove the airlock.

The design, which has a pump for the warm floor, is not particularly difficult. Depending on the type, the principle of operation may differ somewhat.

Types of equipment for the arrangement of the rotor

There are two variants of such a device. Let's consider each species separately:

• Equipment with dry rotor. The motor and the rotor do not come in contact with water, they are in a separate chamber. Periodically, maintenance of such an engine will be required. The connection of the impeller with the rotor goes through rubber gaskets or cuffs. The power of the equipment allows you to maintain large areas with a good head. As a result, high efficiency up to 80%, is indifferent to the quality of water. The drawback is increased power consumption, noise at work, wear of seals. There are three types of designs: block, vertical, horizontal (console).
• Devices with a wet rotor. In such equipment, the impeller and the rotor are in a working environment, which is both a means of cooling and lubricating material. The pump for the warm floor of this plan operates quietly, requires no maintenance, it is possible to regulate the flow rate of the coolant, low price, low power consumption. But there are also drawbacks: it will be necessary to monitor the quality of the coolant (sensitive to hard water), a low efficiency of 30 to 50%. Therefore, it is used for maintenance of areas of not more than 400 square meters. M.

Apparently, the application depends on the selected unit.

Classification by number of speeds

There are two types of unit:

• Single-speed. A simple type of equipment, works in the same mode with a certain type of temperature.
• Adjustable. Can be two-speed or more. Adjusting the performance allows you to work in different modes and in a wider range of temperatures, which allows you to significantly save energy costs.

This is another characteristic that affects the choice of the device.

Collector devices

These systems can be identified in a separate category. What is the purpose of the collector with the pump? The warm floor can be mounted in the same room or in several rooms. With a series connection at the time of operation, there will be a significant temperature difference. It is based on the laws of physics. The heat carrier, when moving through pipes, will give off temperature and cool down. To minimize such losses and achieve a similar microclimate in all rooms, a pump with a collector is provided. It allows parallel connection of several circuits.

Marking

When choosing a circulation pump for a warm floor, attention should be paid to the characteristics displayed on its housing. In the "Type" line, you can see both letters and numbers:

• UPS - defines the control or the number of speeds (UP - single-speed, UPS - three-speed, UPE - electronic control).
• The first digit indicates the diameter of the inlet / outlet nozzles in mm.
• The second number indicates the height of the coolant rise. This can be 40, 60, 80, i.e. at 4, 6, 8 m or 0.4; 0.6; 0.8 atmospheres.
• A - the presence of a vent or body material. A - air vent is, B - body made of bronze, N - body material - stainless steel.
• The third digit denotes the mounting length.

The marking additionally includes data on electricity consumption and other data. It all depends on the manufacturer. To select the equipment, the main line is the "Type" line with legend.

Advantage of use

Mount it can be a warm floor without a pump. But in this case it should be understood that the return on this device will be much lower. This is especially noticeable in large areas. The natural circulation of the coolant through the system does not allow for an even distribution of the temperature regime. And the longer the pipeline will be, the lower the temperature will be given to remote areas.

To increase it in a remote room with a serial connection, you will have to increase the power of the entire heating system. And this will create an uncomfortable climate in nearby rooms and significantly raise energy costs. The circulation pump for the warm floor largely solves this problem.

Fundamentals of equipment selection

In order to choose the right device, one rule should be observed - the technical characteristics of the system must coincide with the technical properties of the pump. That is, the choice is influenced by the following factors:

• Performance. It is designated in cubic meters / hour. This indicator gives an understanding of how much coolant is pumped per hour of operation. For normal operation, the entire volume must be pumped three times during this period of time. To perform a qualitative calculation, it is necessary to take into account a number of factors: length and complexity of the highway; Material from which the pipeline is made; Diameter of pipes; Volume of fluid in the system.
• Pressure. For small contours, this value is not as important as for pipelines of large length with a significant number of bends. Having determined the performance of the device, you should also specify the working pressure - whether it will meet the technical specification.
• Energy consumption. It is better to choose a model with a power-off and power-down module. This will significantly reduce the cost of this article during operation.
• Additional characteristics. It is important to pay attention to the operational features of the device. Due to this in the future, you can avoid unnecessary costs for repairs.

As a result, you can make a high-quality and inexpensive heating system "warm floor".

The pump can significantly improve the efficiency of such a device. But for this it is important to calculate and correctly choose the equipment. It is better to trust professionals. Or use a calculator on the Internet.

Pump group

A heated floor unit is available:

• Pump. It is responsible for the circulation of the liquid through the system.
• Shut-off valves. When the set temperature is set, the coolant supply to the system is blocked.
• Bypass valve. It is designed to equalize the pressure between feed and return.
• Thermostatic and non-return valves. Provide support for the constant temperature regime of the system.
• Collector. Can be present or not depending on the connection scheme (parallel or serial).

If you correctly connect the water floor with a heat pump, you can get a separate high-quality heating source.

Mounting Features

A pump for a warm water floor can be connected in two ways:

• On the supply of coolant. In this version there is a big drawback, especially characteristic for floor boilers. At the top of the heating system, air can accumulate, which will suck out the pump. As a result, a vacuum appears and in this part the boiler can boil. This is the biggest disadvantage of this connection. Some professionals offer this method of connection, but it is recommended to periodically release an air-cork.

• On the return. In such connections, the coolant will be at a lower temperature. This will contribute to a longer pump life. And when the pump is pushed into the boiler, the air plug will not form.

There are a number of important points that should be observed:

• The pump shaft should be installed horizontally. If mounted in another position, then the loss of productivity will be about 30%.
• It is better to install the pump on the bypass line of the system. This will help with minimal losses solve the heating problem if the pump breaks down or the supply of electricity has stopped.
• At the time of the first start, air plugs can not be avoided when the system is filled with liquid. Do not be scared. Through the valve or air vent you need to drain the plug.

If you connect special difficulties do not arise, the main thing is to properly assemble a set of pumping equipment.

Faults and repairs

In the heat system, especially in areas with hard water, salt accumulates, which can settle on the pump parts. The rotor can jam. And if after the summer rest the pump stops working, then it is necessary to carefully disassemble the device, and push the impeller with a screwdriver. Surrendered and scrolled several times - you can install the system back. This failure is typical for systems with a wet rotor. Especially, it should be done with pumps that have ceramic bearings. The material is brittle, and in the event of a breakdown, you will have to look for a suitable part, carry out major repairs.

The pump for the "warm floor with dry rotor" system must undergo maintenance, lubrication of parts, replacement of gaskets. The life of such devices with proper care is long.

Prevention of malfunctions

The best repair is to prevent damage. For this you need to perform a number of actions:

• Before starting the system, flush it. This will reduce the amount of debris and scale that can settle on the pump parts.
• Refill the line with softened water. Or, when installing, provide water softeners or filters in the heating circuit.
• For the summer period, the water does not drain from the system.
• For a non-working season, fold 3-4 times to run the pump for a while.

All these measures will significantly reduce the risk of pump malfunction.

Connecting the pump to the warm floor can be done by yourself. The complexity is a competent calculation and selection of equipment. It is better to provide a parallel connection scheme with a collector device. This will allow you to warm up all the rooms evenly. Installation should be carried out according to the instructions. From this stage depends the quality of the work of the warm floor. Another important point is the prevention of malfunctions and proper operation. If you take into account all these nuances, the quality of additional heating will ensure the most comfortable microclimate in housing with minimal energy consumption.

So, we found out what the circulating pump is for a floor.