Working Principle of Fan Coil Unit Control

The Horizontal Rear Return Air Plenum (HH-R) is our basic fan coil for high static application with a galvanized rear return air plenum and filter. Ideal for mounting above ceilings, in closets, hallways and bathroom areas, the plenum conceals the unit's blower motor, which is easily accessible for service by removing the bottom panel. Horizontal Bottom Return also available.. having a bit of trouble locating a wiring diagram and parts list for a fan coil. this is the first time i've ever come across this manufacturer, there website doesn;t exist anymore and the unit appears to be almost custom.

At the center of a basic FCU schematic diagram is the fan, which pulls air in from outside, and forces it through both the heating and cooling coils. The heating coil contains hot refrigerant, which absorbs heat from the air and warms it before blowing it into the room.. Williams fan coil unit wiring diagrams provide detailed information related to the installation and functioning of various fan coil unit components and wiring. To read these diagrams, professionals should have some knowledge in electricity and electronics as the diagrams provide complex information.