Planning And Use; Operating Modes - ABB i-bus KNX Product Manual

4

Planning and use

4.1

Operating modes

© 2009 Busch-Jaeger Elektro GmbH – A Company of the ABB Group
This section contains tips and application examples for practical application
of the device.
The ambient temperature controller has he following four operating modes:
– Frost protection mode (with heating): ambient temperature control is
disabled; heating is only on if the ambient temperature has fallen so
far the heating system may be in danger of freezing.
Heat protection mode (with cooling): ambient temperature control is
disabled; cooling is on only if the ambient temperature has risen so
far that it is virtually impossible to use the room.
– Comfort mode (heating and cooling): the setpoint for the ambient
temperature is set to a value that enables "normal usage" of the area
at a pleasant temperature.
– Standby mode (heating): the ambient temperature is reduced
(e.g. during temporary absence) to save heating costs but the comfort
temperature can be restored quickly when necessary.
Standby mode (cooling): the ambient temperature is increased
(e.g. during temporary absence) to save energy costs but the comfort
temperature can be restored quickly when necessary.
– Night mode (heating and cooling): during the night areas are not used
for extended periods; the ambient temperature is reduced to a value
appropriate for the night and the comfort setpoint can be restored
relatively quickly in the morning.
For switching between the operating modes switching telegrams
(parameter "operating mode switching": "1 bit (3x)") or 1-byte value
telegrams (parameter "operating mode switching": "1 byte (2x)") are used
(see also drawings of operating modes on page 83, Section Operating
mode switching).
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