Operating Mode: "Fan Coil Control; Terms; Structure Of An Hvac System With Fan Coil Units; Structure Of A Fan Coil Unit - ABB i-bus EIB Product Manual

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ABB i-bus EIB / KNX
3.4 Operating mode:
"Fan coil control"
3.4.1

Terms

3.4.2 Structure of an HVAC
system with fan coil units
3.4.3

Structure of a fan coil unit

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Application and planning
A fan coil unit is connected to a central heating and cooling supply and
generates the required temperature room by room. A room can be heated,
cooled and ventilated with a fan coil unit.
An HVAC system with fan coil units (HVAC = Heating, ventilation, air-
conditioning) consists of a central hot and cold water supply. Fan coil units
are mounted in the rooms and directly connected to the hot and cold water
circulation loops.
Fig. 8: Structure of an HVAC system with fan coil units
The heat exchangers and the fan are the most important components of a
fan coil unit. The hot or cold water flows into the heat exchangers depending
on the room temperature required. The flow of water through the heat
exchangers is controlled via the valves.
Valves
Drip tray
Fig. 9: Structure of a fan coil unit
The fan blows air past the heat exchangers and through a filter into the
room. The air is heated or cooled at the heat exchangers and thus generates
the required room temperature. The fan is driven by a motor. The motor and
the valves are regulated by the Fan Coil Controller FC/S 1.1.
The condensed water that is generated by the cooling process is collected in
a drip tray.
Fan Coil Units
Hot water circulation loop
Cold water circulation loop
Boiler and cold
water supply
Fan Motor
Filter Heat exchanger
Switchbox
with controller
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