Centrifugal fan is a typical ventilation and ventilation equipment, which can control the indoor temperature by adjusting it. For example, when the indoor heat load changes and the indoor temperature remains unchanged, it can not only keep the room air supply volume unchanged, but also adapt by changing the air supply temperature of the centrifugal fan; of course, it can also keep the air supply temperature unchanged by changing the air supply temperature of the centrifugal fan. Quantity to adapt.
Therefore, for centrifugal fans, keeping the annual air supply volume unchanged, the whole air system which adapts to the change of air conditioning load by changing the air supply temperature becomes a constant air volume system, while the system which keeps the air supply temperature or parameters unchanged and adapts to the change of air conditioning load by changing the air supply volume becomes a variable air volume system.
Some requirements for the temperature of centrifugal fan coil unit are put forward. When the fan coil unit operates at ambient temperature for cooling, the temperature is controlled at 16-36 C and 10-30 C for heating. At the same time, it should be noted that the centrifugal fan coil unit can not be installed in the corrosive gas area, in order to avoid adverse effects on it.
In fact, before installing the centrifugal fan coil unit, it is necessary to check whether there is a corresponding unit to meet the requirements of the device, maintenance space; at the same time, confirm the space and installation of pipelines and electrical lines. The lifting point of the centrifugal fan coil unit should be tightened and the required strength should be satisfied in order to accept the unit weight and operation oscillation.
When installing, it is forbidden to transfer the spiral case or impeller of the hand-held fan. Horizontal hoisting of the concealed horizontal centrifugal fan-coil unit should be guaranteed, otherwise condensate overflow may occur. In addition, customers are advised to use 6-8mm diameter screw with flat gasket, spring washer and nut fixation.