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Benefit
Description
Important
Setting
Effect
Quick setback without
room temperature
sensor
Example
Note
Optimum start control
without room temperature
sensor
310/348
Siemens Building Technologies
HVAC Products
5.50 Constant for quick setback and optimum start
control (KON)
• Making use of the building's thermal storage capacity.
The type of quick setback or optimum start control is dependent on whether or not a
room sensor is used. A differentiation is made between quick setback with and without
room temperature sensor.
This setting is active only if no room sensor is used.
Setting range
0...20
The duration of quick setback or optimum start control will be changed.
Entry:
Increase:
Setback time will become longer
For well insulated buildings that cool down slowly
Decrease:
Setback time will become shorter
For poorly insulated buildings that cool down rather quickly
Quick setback is started as soon as a change to a lower room temperature setpoint
takes place (e.g. switching times in automatic mode).
The heating circuit pump will be deactivated until the quick setback time has elapsed,
which is generated from setting 702
room temperature setpoint change.
The quick setback time is limited to a maximum of 15 hours.
The example applies to a setpoint step change of 4 °C (e.g. TRw from 20 to 16 °C):
TAgem
0
- 20
0
- 10
0
0
0
+10
0
If a room temperature sensor is connected, the quick setback time will not be generated
from this setting. For details, refer to section "Quick setback with room temperature
sensor" (Chapter 6, "General control processes").
For a description of optimum start control, refer to operating line 727.
Basic Documentation RVP540 / RVP550
Description of the EXP settings
Unit
–
, the composite outside temperature and the
EXP
Setting 702
4
8
0
0
0.5
1
3
6
5
11
Values in hours
Factory setting
2
EXP
12
15
0
0
1.5
2
9
11
15 (16.5)
15 (21)
CE1P2488en
20
0
2.5
15
15 (27)
18.10.2002
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