Another example of archive stuff, no mention on variable air flow, and no mention of the modulating valves!!!!
The Fan coil unit Compact option simulates a 4 pipe fan coil unit with hot water heating coil, chilled water cooling coil, and an outside air mixer. The fan coil units are zone equipment units which are assembled from other components. Fan coils contain an outdoor air mixer, a fan, a simple heating coil and a cooling coil. The fan coil unit is connected to a hot water loop (demand side) through its hot water coil and to a chilled water loop (demand side) through its cooling coil. The unit is controlled to meet the zone (remaining) heating or cooling demand. If there is a heating demand, the cooling coil is off and the hot water flow through the heating coil is throttled to meet the demand. The hot water control node must be specified (same as the hot water coil inlet node) as well as maximum and minimum possible hot water volumetric flow rates. If there is a cooling demand from the zone, the hot water coil is off and the chilled water flow through the cooling coil is throttled to meet the load.
You can model Fan coil unit systems with or without outside air.
Andy Brooks
Ability Projects