Siemens RDG200KN Basic Documentation page 35

Cooling setpoint tracking
depending on outside
temperature (P255)
Current setpoint
Clarification concerning
current setpoint in Comfort
mode
2-pipe with P010 = 1 or
4-pipe with P010 = 1 and
P001 = 3
4-pipe with P010 = 1
General notes
Notes on setpoint
adjustment (LTE-Mode
with Synco only)
A6V11545892_en--_a
Other functions:
5)
● If current humidity setpoint is not suitable for room humidity, setpoint shift is
activated via humidity control strategy (P451).
In cooling mode, a large difference between outside and indoor temperatures can
create discomfort and waste energy. The thermostat can track the outside
temperature via the bus and adjust the cooling setpoint to make sure the difference
is not too great. If the outside temperature is higher than 26 °C and 6 K above the
Comfort cooling setpoint, the related setpoint is shifted and kept 6 K below the
outside temperature. This function can be enabled or disabled via P255.
The current setpoint (used by the thermostat for temperature control) is available
on the bus for use in the central control unit.
The Comfort setpoint w (e.g., customer setting on the display) and the current
setpoint w2 (used by the thermostat for temperature control, but not displayed) are
handled differently depending on the selected application and setting.
Both the Comfort setpoint w and current setpoint w2 have the same value.
Heating mode
The Comfort setpoint w (value selectable by e.g., rotary knob) is in the middle of
the dead zone (P055). The current setpoints w2.. (used by the thermostat for
temperature control) are at the boundaries of the dead zone.
w2h = Comfort setpoint (w) – ½ dead zone (X
w2c = Comfort setpoint (w) + ½ dead zone (X
● The supported communication objects are different in LTE-Mode and S-Mode
● Changes via the local HMI or tools have the same priority (the last option is
always used)
● Setting the Comfort basic setpoint resets the runtime Comfort setpoint only
when P103 = 0
● Central setpoint shifting is used for summer/winter compensation in particular
● Setpoint shifting does not influence the setpoints stored in P011, P019, P020
and P055
Functions
Room temperature setpoints
Cooling mode
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dz
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dz
4
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