1. The main control parameters for the selection of vertical surface mounted fan coil units include rated air volume, outlet static pressure, input power, rated cooling capacity, rated heating capacity, noise, water resistance, etc.

2. The vertical surface mounted fan coil unit has a supply air volume of approximately 250-2500m/h and an outlet static pressure of less than 100Pa (high static pressure type with an outlet static pressure greater than 30Pa).

3. The selection of unit specifications should be determined by factors such as room cooling and heating loads, as well as the heat to humidity ratio of the air

1) When the enthalpy of fresh air and room air parameters are equal, the fan coil unit only bears the cooling and heating loads generated by the enclosure structure and the interior of the room;

2) When the enthalpy value of the fresh air is greater or less than the enthalpy value of the room air, the fan coil unit should add or deduct some of the fresh air cooling and heating loads;

3) When the absolute humidity of the fresh air is lower than the humidity of the room air and can fully bear the room's humidity load, the fan coil unit can only bear the room's sensible heat load and should be configured according to dry conditions;

4) When the sensible heat load in the room accounts for a large proportion, the air volume of the fan coil unit should be verified through sensible heat balance calculation.

4. For the fan coil unit of the dual pipe water system (applicable to air conditioning systems that only switch heating or cooling according to seasons or air conditioning areas), only one set of coils is configured, with a dual-purpose model for heating/cooling in winter and summer. For the fan coil unit of a four pipe water system (suitable for air conditioning systems with frequent switching between heating and cooling), a combined model of heating and cooling coils should be configured.

7. For low-temperature and cold storage air conditioning systems, large temperature difference units should be selected.

8. The vertical surface mounted fan coil unit has the following control types:

1) Equipped with a three speed selector switch, it can switch between winter and summer, and is automatically controlled by linking the water circuit electric valve with the room temperature controller;

2) Equipped with a three speed selector switch, it can switch between winter and summer, and the fan can be started and stopped through a room temperature controller, implementing semi-automatic control;

3) Only equipped with a three speed selector switch, implementing manual control.

4) Fan stepless speed control.

According to the requirements of energy-saving standards, a control method combining electric temperature control valves and three speed wind speeds should be adopted.

When selecting products, attention should be paid to three issues: noise, condensation, and the quality of the motor used. This is a project with many quality issues during the sampling inspection.

10. There are different marking methods for fan coil units at home and abroad, and design selection should pay attention to and distinguish between them.