ABB i-bus
®
KNX
Planning and application
© 2008 ABB STOTZ-KONTAKT GmbH
243
4.4.5.5
4 pipe system,
configuration
In a 4 pipe system two separate heat exchangers (for HEATING and
COOLING) are available. Warm and cold water is provided centrally to
two separate pipe systems (of 2 pipes each).
The thermostat onsite decides if heating or cooling is applied.
The thermostat sends a separate heating and cooling signal.
The Room Master directly controls the fan.