Siemens RDG400 - Manual (Page 10)

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Siemens RDG100…/RDG110…/RDG140.../RDG160… Basic Documentation CE1P3182en
Building Technologies Functions 28 May 2009
4.3 Setpoints
The setpoint in Comfort mode can be adjusted via the rotary knob.
For Energy Saving purposes, the setpoint adjusting 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 two limits.
• For heating or cooling applications (e.g. single duct; single duct & H/C coil)
– The setting range in cooling mode is from P09…40° instead of 5…40°
– The setting range in heating mode is from 5…P10° instead of 5…40°
• For cooling and heating with electrical heater or radiator applications
– P09 is the setpoint for cooling and P10 the setpoint for heating;
– the setpoint can no longer be adjusted via rotary knob
Examples Single duct heating or cooling Single duct cooling
with el. heater / radiator
P09 < P10
5°C 40°C 25°C 18°C
P10 P09
Cooling setpoint adjustable 18…25°C
Heating setpoint adjustable 18…25°C
5°C 40°C 25°C 18°C
P10 P09
Cooling setpoint adjustable 18…25°C
Heating setpoint adjustable 18…25°C
P09 ≥ P10
5°C 40°C 25°C 21°C
P09 P10
Cooling setpoint adjustable 25…40°C
Heating setpoint adjustable 5…21°C
Cooling fixed = 25°C (P09)
Heating fixed = 21°C (P10)
If the “Temporary setpoint function” is enabled via parameter P69, the setpoint
adjusted via rotary knob is set back to the Comfort basic setpoint when the
operating mode changes.
The factory setting for the Comfort basic setpoint is 21 °C and can be changed via
parameter P08.
Use control parameters P11 and P12 to adjust the Energy Saving mode setpoints.
The heating setpoint is factory-set to 15 °C and to 30 °C for cooling.
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 is set to OFF (P65, P66), the thermostat does not maintain the setpoint
in the corresponding mode (heating or cooling).
This means no protective heating or cooling function and thus risk of frost in the
heating mode or risk of overheat in cooling mode!
Comfort mode
Setpoint limitation
P09 < P10
P09 ≥ P10
Temporary setpoint
Energy Saving mode
Protection mode
Caution