2-Pipe System Heating And Cooling - ABB i-bus KNX FCA/S 1.1M Product Manual

ABB i-bus KNX
4.1.5.2 2-pipe system
HEATING and
COOLING
© 2010 ABB STOTZ-KONTAKT GmbH
Planning and application
In this system only one heat exchanger is available for HEATING and
COOLING. Depending on the weather, warm or cold water is supplied
centrally to the pipe system (2 pipes). The Fan Coil Actuator or the
thermostat is informed if warm or cold water is currently flowing through the
system. Depending on this setting both control values act on just a single
valve. The thermostat decides which control value (HEATING/COOLING)
is actively sent. The FCA/S controls the fan speed and only one valve.
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