Pump circulation systems are used forsupport the movement of water coolant in enterprises and private homes. The tasks can be different - from providing the basic function of heating to the organization of advanced air conditioning. The circulation system itself is formed by several groups of communication elements, but the main link is almost always the pump.
Principle of operation of the system
At a basic level, the heating infrastructure can assume a natural movement of the coolant. In this case, the single-tube a scheme in accordance with which the target objects of heat accumulation fed Hot environment, and on the back side there are exhausted cold streams. They are again sent to boiler, warm up and repeat the described cycle. This The model is easy to maintain, but inefficient andrarely suitable, for example, for two-story buildings. In turn, the circulation pump for heating systems allows you to increase the power feed, which in the end gives the possibility of uniform distribution over allpoints of heat. That is, the radiators installed on different floors will be supplied with a coolant with the same temperature, since the difference in the delivery time will be insignificant. Pumps support sufficient for recovery pressure, excluding water cooling during the movement.
Types of circulating pumps
There are two types of pumps. In the first case, the rotor of the equipment is located in the coolant transfer zone, which requires the use of the latter and as a lubricant. This is the so-called wet rotor configuration, characterized by a simple design, ease maintenance and quiet operation. But it is important to consider some of the features of mounting such units. How to install a circulating pump in the heating system of this type?
Installation is only in horizontalposition relative to the earth's surface. Inclined and, the more so, vertical layouts can lead to equipment breakdown in the first weeks of operation. Also Because of the modest performance of similar modelsare installed mainly in small houses - by the way, the efficiency of the units rarely exceeds 50%. The second type of circulating transfer pumps represents models provided with a rotor insulated from the coolant. Advantages of this technique include an efficiency of about 70% and a high reliability. However, during the operation, regular renewal of the lubricating oil is required.
Configurations for the location of the unit
The layout of the pump is determined by the waste heat transfer system. That is, the configuration of the channels through which already cold water returns to boiler. AT single-tube system terminals of batteries and radiatorscan be connected to the lines that carry out the delivery of the coolant. In this case, the heating efficiency is reduced with respect to the heating points, which will be supplied with a mixed medium. Such a circulation system assumes that the pump must be located at the point of water supply to the boiler equipment. But more productive in terms of volumes heat transfer two - pipe circuit. It allows you to completely separate the outlines of the direction of hot and cold water, without reducing efficiency work part of the heaters. In such systems, it may be necessary to install a second pump - at the outlet from a heating source.
Installing the circulation pump in the system
Before installation work it is necessary to carry outflushing the heating circuits so that sedimentary elements come out of the pipeline. The presence of foreign particles after repair operations, for example, can disable the equipment. Directly the installation of the circulation pump in the heating system is carried out by fastening the unit to a discharge or supply pipe. The cut is made by the complete armature with the help of a metalwork tool. It is important to take into account that before and after the location of the pump, stopcocks should also be placed. They will allow in the event of equipment failure to stop the delivery of water and perform repairs.
Further follows the test phase. The circuits must be filled with a coolant, then check the pressure. It must correspond to the optimum level for a particular heating system and the parameters of the pumping unit. If necessary, you can perform crimping, which will identify possible areas of depressurization. However, the operation of the plant may prevent air-blasting pipes. How to install the circulation pump in the heating system, so that initially there was a removed excess air? To do this, immediately after attaching the unit, it is necessary to start the water and open all the valves. This is the basic operation to remove air in the circuits, which follows to repeat several times at intervals of 15 minutes.
Reviews about systems with pumping circulation
Owners of houses with similar communicationsnote their undoubted merit in terms of effective support of the coolant supply pressure. Many point to the ergonomics of the pump control systems, which make it possible to precisely regulate the supply of hot water. Nevertheless the circulation system has a number of shortcomings. The main one is the requirement for regular maintenance. For example, models of pumps, secured isolated rotor, will always need effective lubrication.
The use of water as a coolant to this day is the most cheap way of organizing heating systems. Alternative electric radiators are costly due to the cost of electricity, and the gas equipment of many frightens off the threat of accidents. But the circulation system, which provides the delivery of water to the radiators, is not an ideal solution. If in the course of operation such communications regularly perform their tasks, which is a plus, the stage of technical organization of the pipeline delivers a lot of trouble. To this we should add the need for integration of the pump, as well as further measures for its maintenance.