Types of pumps for heating systems
For heating systems of premises, pumps with a "wet" or "dry" rotor are mainly used.
The design of the "wet" circulating pump is quite simple: the impeller is in the liquid that the pump pumps. In this case, the liquid, in addition to the heat transfer function, performs the function of cooling the motor and lubricates the pump parts.
The main characteristic of this design is the ability to expel air during start-up. The minus of the "wet" pump is the efficiency, which does not exceed 50%.Such a circulation pump is installed in small and single-storey residential buildings.
Type of pump with a "dry" rotor is mainly installed in multi-storey buildings, tk.it is designed for water pumping in large quantities. The motor of this design does not come into contact with pumped water and is installed directly into the pipeline.
The above characteristics will help you find a practical pumping unit for your home.
Selection of the pump for heating
When selecting and immediately before installing the circulation pump, the person who bought it must make the appropriate calculations, and the specialist will do it best.
The most important thing to know is the amount of heat needed to heat your home. In order to find out, you need to consider the following:
- How insulated the floor and walls of the room;
- Which windows are installed in the house, etc.
Recently, adjustable pumps with built-in time relays and pressure control appeared on sale. Such pumps are especially suitable for dismantling or repairing an already existing heating system, becausethey perfectly adapt to changes in the system. They also save energy consumption. Such a pumping system is designed for operation from a direct current at a voltage of 12-24 volts.
An important factor in selecting a pump is the material from which it is made. This is of great importance. If you are selecting a pump for heating floors, it is best to take a pump, the body of which is made of stainless steel. This will extend the life of the pump structure, becausethis material is more resistant to corrosion, in contrast, for example, from cast iron. A huge plus present in the modern pump market is that the bearings and shaft are made of durable material - ceramics.
Installation of the circulating pump
It should be noted that before installing the circulation pump, experts recommend installing a special retaining hydraulic compensator( tank), which is installed to maintain the static pressure in the pipes.
The next step is to remove excess air from the pipeline system. This is done as follows: fill the system with water, remove air with the help of valves on the heaters. Then turn on the boiler and pump. Next, open the radiator valve and allow the pump to run for several minutes. After the pump is turned off and the air is removed from the system again. Further, if necessary, supplement the system with water and re-connect.
Modern circulation pumps are easy to install and do not require special settings. There are two main schemes for installing circulating pumps: two-pipe and one-pipe.
According to the following connection diagram, the function chain is installed from the valve and pump.
Detailed step-by-step instructions for installing the circulating pump are presented in the video.
In addition to all the above advantages of the circulation pumps, there is one more - this is a democratic and affordable price that will please any host!