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Siemens
RDU341 Basic Documentation
CE1P3172en
Building Technologies
2015-06-08
3.2 Operating
modes
The thermostat's operating mode can be influenced in different ways (see below).
Specific heating and cooling setpoints are assigned to each operating mode.
The thermostat sends the effective room operating mode on the bus.
The following operating modes are available:
In Auto Timer mode the room operating mode is commanded via bus.
Auto Timer is replaced by Comfort when no time schedule via bus is present
In Comfort mode, the thermostat maintains the Comfort setpoint. This setpoint can
be defined via parameters P8, P9 and P10.
It can be locally adjusted via the
+/-
buttons or via bus.
In Comfort mode, the fan can be set to automatic or manual fan speed: Low,
medium or high.
The setpoints (less heating and cooling than in Comfort mode) can be defined via
parameters P11 and P12.
The thermostat switches to Economy mode when...
– the operating mode button is pressed (only possible if parameter P02 is set to 2)
– Economy is sent via bus
– an operating mode switchover contact (e.g. keycard contact presence detector,
window contact) is active.
The contact can be connected to multifunctional input X1, X2.
Set parameter P38 / P40 to 3 (P02 is irrelevant) *)
– "Window state" is sent via bus, e.g. from a KNX switch or a KNX presence
detector (P02 is irrelevant) *)
*) Operating mode switchover:
Only one input source must be used, either local
input X1/X2 or KNX bus.
User operations are ineffective and “OFF” is displayed if the operating mode
switchover contact is active, or if "Window state" is sent via bus.
In Protection mode, the system is...
– protected against frost (factory setting 8 °C, can be disabled or changed via
P65)
– protected against overheating (factory setting OFF, can be enabled or changed
via P66)
No other operating mode can be selected locally if Protection mode is commanded
via bus.
and
are displayed.
KNX
R
Room operating mode:
State
Auto Timer
Comfort
Economy
KNX
R
Room operating mode:
Window state
Note:
Protection
