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Siemens Building Technologies Basic Dokumentation RVA63.280, RVA53.280 CE1P2374E
Landis & Staefa Division 19.04.2001
3.3 Switching differential of the boiler
temperature
Matching the burner to the type of boiler.
The boiler temperature is controlled by a 2-position controller for which a switching
differential can be set.
Setting range Unit Factory setting
0...20 °C (K) 8
The setting changes the switching differential of the boiler temperature control.
Entry:
Increase: Switching differential will become wider
Fewer burner starts and longer burner running times
Decrease: Switching differential will become smaller
More burner starts and shorter burner running times
With 2-position control, heat is produced at certain intervals. The period of time during
which heat is delivered is dependent upon the boiler mass and the amount of water
contained in the boiler.
The greater the demand for heat, the longer the burner runs at a time.
°C
2371Z23
ON
OFF
w
SD
w Setpoint
SD Switching differential of the boiler
Switch-on point
Switch-off point
Benefit
Description
Setting
Effect
Boiler temperature
control
Switching differential
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