1, the selection of fan coil.
Fan coil has two main parameters: cooling (heat) and air supply, fan coil choice has the following two methods:.
(1) According to the room circulating air volume, the product of the room area, floor height (behind the ceiling) and the number of air changes in the room is the circulating air volume of the room. The fan coil type can be determined by using the circulating air volume corresponding to the high-speed air volume of the fan coil.
(2) According to the room required cooling load selection: according to the unit area load and room area, the room required cooling load value can be obtained, and the fan coil model can be determined by using the cooling capacity of the room cooling load corresponding to the high-speed air volume of the fan coil.
After determining the model, it is also necessary to determine the installation method of the fan coil unit (surface installation or installation), the return air method (lower return, side return, etc.) and the connection position of the water pipe (left or right), etc. Fan coil.
Note: When the room area is large, multiple fan coils should be considered. The load per unit area of the room is large. When the noise requirement is not high, the fan coil with large air volume and cooling capacity can be considered.

2, the selection of air handling units.
The air handling unit is mainly used to process indoor air and supply fresh air. Generally, there are two working states: air conditioning condition and fresh air condition.
The choice of air handling unit is generally determined by three main parameters: air volume, number of surface cooler pipes and external pressure.
First, determine the model of the air handling unit according to the air volume required by the system, and then determine the number of rows of pipes according to the cooling capacity required, so that the residual pressure can be determined according to the residual pressure required by the system.
There are generally two types of air handling units: ceiling type and floor type. Floor type includes vertical type and horizontal type. There are also many different ways of returning air to fan coil units. The final determination should be made according to the construction conditions and the requirements of the building owner.
The problem of frequent water leakage of fan coil in guest room is usually caused by condensed water if it is not the pipe or valve damage. The water leakage is mainly caused by heat preservation outside the fan coil water collecting tray. If heat preservation is strengthened, it can be eliminated. For example, in the water collecting tray, the fan coil condensate pipe is not smooth and is caused by condensate overflow. The method of dredging the condensate pipe is usually to prepare a 4-5 m long plastic pipe, one end is inserted into the condensate drain pipe, and the other end is connected to the faucet in the toilet (a small joint can be made and screwed on the faucet by thread). The pipeline is dredged by the pressure of water, or purged with a carbon dioxide cylinder.
The phenomenon of blockage of the condensate pipe of the fan coil unit is common. This is mainly due to the existence of water in the fan coil unit of the guest room. In addition, the temperature is suitable, which is prone to algae reproduction and increase the length of the fan coil unit, resulting in gelatinous and slippery extremely thick residue. The condensate pipe of the central air conditioning fan coil unit is blocked, water often leaks from above. Once blocked, there will be a lot of biological sludge, which is very dirty. In addition to cleaning it regularly, there are the following methods:.
It is recommended that the system be thoroughly flushed and descaled, and check whether the filter screen is added to the return air outlet of the fan coil and whether the installation slope of the pipeline meets the requirements.
Of course, cleaning is a way to treat the symptoms but not the root cause. The condensate of the fan coil is often blocked because there is too much dust in the place where the equipment is located, and the drip tray is often polluted. In fact, the biological scale is the dirt of the environment.
In addition to cleaning, the maintenance of the equipment should be active, otherwise, it will be cleaned today and blocked tomorrow.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures