Shandong Grid Group Co

The best-selling horizontal surface-mounted fan-coil unit produced by Greed is mainly composed of a fan heat exchanger (coil), a condensate tray shell and a controller. It is suitable for centralized air-conditioning systems. Advanced design, complete varieties, superior performance, wide range of uses, usually used in various hotels, apartments, restaurants, hospitals, commercial buildings that require low noise and flexible temperature adjustment. Product Features: Small footprint, small footprint and convenient layout. Compact size, good balance and quick installation. The structure is symmetrical, the lines are crisp, the edges are crisp and the appearance is beautiful.
The turbulent aluminum fin steel tube heat exchanger with high heat transfer efficiency produced by Italian assembly line has high efficiency.
The fan has three adjustable speeds and uses a permanent capacitor motor to save energy and save electricity.
Using a high-precision bearing motor and specially selected sound-absorbing and heat-insulating materials that do not need to be replenished with lubricating oil, it runs smoothly, has low noise and has a long service life.
Key points for selection
The main control parameters for unit selection include rated air volume, outlet static pressure, input power, rated cooling capacity, rated heat supply, noise, water resistance, etc.
The air supply volume of the fan coil unit is approximately less than the outlet static pressure (the outlet static pressure is greater than the high static pressure type).
The selection of unit specifications should be determined by factors such as the room's cooling and heating load and the heat-humidity ratio of the air.
) When the fresh air and room air parameters are of equal enthalpy, the fan coil unit only bears the burden of the heat generated inside the envelope structure and the room. Cooling and heating load
) When the fresh air enthalpy value is greater or smaller than the room air enthalpy value, the fan coil unit should add or subtract part of the fresh air cooling and heating load
) When the absolute moisture content of the fresh air is lower than the room air When the moisture content can fully bear the wet load of the room, the fan coil can only bear the sensible heat load of the room and should be configured according to dry working conditions
) When the sensible heat load of the room accounts for a large proportion, the fan coil should be checked through sensible heat balance calculation Manage the air volume of the unit.
When selecting a unit, the deviation between the actual performance and the rated value should be considered and the following characteristics should be paid attention to
) The rated cooling capacity of the unit is generally the test value under the condition of air enthalpy drop
) Single disk The rated heat supply of the tube unit is generally times the rated cooling capacity
) The rated values and parameters are the values of the fan at high-end speeds. When designing, it is generally advisable to select the values at mid-range wind speeds in the product sample. If the product does not provide rating data at different wind speeds, please refer to the table for conversion.
Table air volume conversion coefficient
Rating value category
High-grade wind speed
Medium-grade wind speed
Low-grade wind speed
Air volume
For double-pipe water system (applicable to The fan coil unit of the air conditioning system (an air conditioning system that switches heating or cooling only according to seasons or only according to air conditioning zones) is only equipped with one set of coils for both winter and summer cooling. For four-pipe water systems (fan coil units suitable for air conditioning systems with frequent switching of cooling supply) should be equipped with a combined model of two sets of heating and cooling coils.
For low-temperature cold storage air conditioning systems, a large temperature difference unit should be selected .
At present, the fan coil unit has the following control types
) With a three-speed selector switch, it can switch between winter and summer. The room temperature controller is linked to the waterway electric valve to implement automatic control
) With a three-speed selector switch, it can The transition between winter and summer is semi-automatically controlled by the room temperature controller linking the fan on and off
) It only has a three-speed selector switch for manual control.
) Stepless speed control of the fan.
According to the requirements of relevant energy-saving standards, a control method combining an electric temperature control valve and three-speed wind speed should be used.
When selecting products, you should pay attention to three issues: noise condensation and the quality of the motor used. This is an item with many quality problems in current sampling inspections.
The different labeling methods of fan coil units at home and abroad need to be paid attention to and differentiated in the design and selection.
Installation Points
A filter should be installed at the water inlet of the unit. When flushing the main pipe of the refrigerant water system, sewage is not allowed to pass through the coil. An exhaust device should be installed at the highest point of the coil pipe connection, and a drain device should be installed at the lowest point.
The condensate discharge pipe of the fan coil unit must have a certain slope to ensure that no water accumulates in the drip tray.