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Siemens
RDG100.., RDG110.., RDG160T.. Basic Documentation
CE1P3181en
Building Technologies
Functions
2015-07-29
4.3 Room temperature setpoints
The factory setting for the Comfort basic setpoint is
21 °C (70 °F)
and can be changed
via parameter P08.
The setpoint in Comfort mode can be adjusted via the
rotary knob
.
If the "Temporary setpoint function" is enabled via parameter P69, the setpoint
adjusted via the rotary knob is set back to the Comfort basic setpoint when the
operating mode changes.
For comfort or 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.
The customer adjusts the desired setpoint and the thermostat controls the room
temperature accordingly.
For
4-pipe applications
*)
, the selected comfort setpoint is in the middle of the dead
zone (P33). The unit stops to energize the heating/cooling outputs as soon as the
room temperature reaches the dead zone.
Example
Cooling setpoint adjustable 18…25 °C (64…77 °F)
Heating setpoint adjustable 18…25 °C (64…77 °F)
If the minimum limit
P09 is set higher
than the limit P10, then
– The setting range of cooling setpoint is from
P09…40 °C (P09…104 °F)
in place
of 5…40 °C (41…104 °F)
– The setting range of heating setpoint is from
5…P10 °C (41…P10 °F)
in place of
5…40 °C (41…104 °F)
This allows the user to limit the maximum heating setpoint and the minimum cooling
setpoint. This concept helps to save energy costs.
For
4-pipe applications
:
– The thermostat runs with the setpoint of the active sequence:
In heating mode, the heating setpoint is active and adjustable via rotary knob.
In cooling mode, the cooling setpoint is active and adjustable via rotary knob.
– Switching from the heating setpoint to the cooling setpoint and vice-versa
occurs when the room temperature reaches the adjusted limitation (P09 or
P10) of the
inactive
sequence. E.g. the thermostat is in heating sequence and
runs with the heating setpoint. When the room temperature reaches P09, the
thermostat switches to cooling mode and runs with the cooling setpoint, as
long as the room temperature does not drop below P10.
Example
Cooling setpoint adjustable 25…40 °C (77…104 °F)
Heating setpoint adjustable 5…21 °C (41…70 °F)
Use control parameters P11 and P12 to adjust the Economy mode setpoints.
The heating setpoint is factory-set to
15 °C (59 °F)
, and the cooling setpoint to
30 °C
(86 °F)
.
Comfort mode
Temporary setpoint
Setpoint limitation
P09 < P10
(comfort concept)
P09 P10
(energy saving concept)
Economy mode