Siemens RDF302/VB User Manual

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Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure 2022-06-17
The thermostat can be forced into Economy mode (e.g. when a window is opened,
when a presence detector signals "no one present", when the keycard of a hotel
room is withdrawn, etc). The contact can be connected to multifunctional input X1,
X2. Set parameter P38, P40 to 3.
The function is also available via the Modbus signal "Window state",
Note: Only one input source must be used, either local input X1/X2 or Modbus.
User operations are ineffective and “OFF” is displayed if the operating mode
switchover contact is active, or if "WindowContact" is sent via Modbus. RDF302.B
does not have inputs X1 and X2.
3.3 Room temperature setpoint
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 Modbus with communication
object "Comfort basic setpoint". The last intervention always wins.
The Comfort setpoint can be adjusted via the +/- buttons,
or via Modbus from a remote device like a touch panel or master unit, etc.
The last intervention always wins.
If the “Temporary setpoint” function is enabled via parameter P69, the Comfort
setpoint adjusted via the + / - buttons or via Modbus 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):
– The cooling and heating setpoint are adjustable
– 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
Examples
2-pipe heating OR cooling
4-pipe heating AND cooling
P09 < P10
Cooling setpoint adjustable 18…25 °C
Heating setpoint adjustable 18…25 °C
Cooling setpoint adjustable 18…25 °C
Heating setpoint adjustable 18…25 °C
Operating mode
switchover contact
(window contact)
Room operating mode:
Window State
Comfort mode
Temporary setpoint
Setpoint limitation
P09 < P10
P09 ≥ P10

Siemens RDF302/VB Specifications

General

Brand	Siemens
Model	RDF302/VB
Category	Thermostat
Language	English