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ABB i-bus
®
KNX
Commissioning
© 2008 ABB STOTZ-KONTAKT GmbH
148
3.2.7.5
HVAC System –
2 Control values/4 pipe
If option
2 Control values/4 pipe
is selected additional parameters appear:
Toggle via automatically
This parameter serves as a note or remark.
Valve HEATING/Valve COOLING
The HEATING valve is controlled via the communication object
Control value HEATING
.
The COOLING valve is controlled via the communication object
Control value COOLING
.
Toggling between HEATING and COOLING is implemented by
updating the control values. The HEATING/COOLING status is then
set accordingly.
Note
The switch over between HEATING/COOLING should occur
exclusively with the respective thermostat. Here only HEATING or
COOLING are active dependent on the last active received control
value.
If a control with a value > 0 is received, the fan and the
corresponding valve are controlled.
- The other valve is closed.
- If a control value with a value = 0 is received, this is ignored
if the other control value > 0.
For further information see:
Configuration of a HVAC system with Fan Coil units
,
page 237
Operation HEATING/COOLING after
bus voltage recovery
Options: unchanged
HEATING
COOLING
Using this parameter the reaction after bus voltage recovery is set.
•
unchanged:
After bus voltage recovery the state which existed before
bus voltage failure is re-established.
•
HEATING:
After bus voltage recovery the
HEATING
state is set.
•
COOLING:
After bus voltage recovery the
COOLING
state is set.
Содержание i-bus KNX Room Master Premium RM/S 2.1
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