Book - School of Science and Technology

Air-water systems 391OutletgrilleTemperaturecontrolMotorHeating andchilled watercontrol valvesDrain spigotInletTangential fanDrip trayAir filter (removable)Figure 14.17 Under window fan-coil unit (four-pipe)Heating andchilled waterpipe connections(valves omitted)Fan-coil unitSuspensionDrain trayand outletAccess tofan coilsand filterRecirculationSupplyFigure 14.18 Fan-coil unit fitted above a suspended ceilingindependently. This requirement may be met in a number of ways, depending upon thesophistication of the individual system. At one end of the scale this air, pre-filtered andconditioned, is introduced to the space through a ducted system from a central plant, andthe exhaust air is ducted to an energy recovery unit of some sort. The diametricallyopposite, and obviously much cheaper method (which cannot be recommended), is foreach unit to be placed belowa windowand outside air admitted to it through an aperture