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Siemens RDG100KN Basic documentation CE1P3191en
Building Technologies Functions 22 Jun 2010
3.3 Room temperature setpoints
3.3.1 Description
The factory setting for the Comfort basic setpoint is 21 °C and can be changed in
the thermostat’s EEPROM via parameter P08 or via bus with communication object
" Comfort basic setpoint". The last intervention always wins.
The Comfort setpoint can be adjusted via the rotary knob,
or via bus from a remote device like a touchpanel, operating unit, etc.
The last intervention always wins.
If the “Temporary setpoint” function is enabled via parameter P69, the Comfort
setpoint adjusted via the rotary knob, the or via bus is set back to the Comfort basic
setpoint stored in P08 when the operating mode changes.
For energy saving purposes, the setpoint setting range can be limited to minimum
(P09) and maximum (P10).
 If the minimum limit P09 is set lower than the maximum limit P10, both heating
and cooling are adjustable between these 2 limits
 For heating or cooling applications (e.g. 2-stage):
– The setting range in cooling mode is from P09…40 °C in place of 5…40 °C
– The setting range in heating mode is from 5…P10 °C in place of 5…40 °C
 For heating and cooling applications (e.g. 4-pipe):
– P09 is the setpoint for cooling and P10 the setpoint for heating
– The setpoint can no longer be adjusted via the rotary knob
Examples 2-pipe heating OR cooling 4-pipe heating AND cooling
P09 < P10
5°C 40°C25°C18°C
P10P09
Cooling setpoint adjustable 18…25 °C
Heating setpoint adjustable 18…25 °C
5°C 40°C25°C18°C
P10P09
Cooling setpoint adjustable 18…25 °C
Heating setpoint adjustable 18…25 °C
P09 ≥ P10
5°C 40°C25°C21°C
P09P10
Cooling setpoint adjustable 25…40 °C
Heating setpoint adjustable 5…21 °C
Cooling fixed = 25 °C (P09)
Heating fixed = 21 °C (P10)
Use control parameters P11 and P12 to adjust the Economy mode setpoints.
The heating setpoint is factory-set to 15 °C, and the cooling setpoint to 30 °C.
Use control parameters P65 and P66 to adjust the Protection mode setpoints.
The heating setpoint is factory-set to 8 °C (frost protection) and to OFF for cooling.
If a setpoint (Economy or Protection) is set to OFF, the thermostat does not control
the room temperature in the corresponding mode (heating or cooling).
This means no protective heating or cooling function and thus risk of frost in
heating mode or risk of overtemperature in cooling mode!
Comfort mode
Temporary setpoint
Setpoint limitation
P09 < P10
P09 ≥ P10
Economy mode
Protection mode
Caution