Siemens RVA47.320 - Minimum Limitation of the Flow Temperature Setpoint

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the heating engineer settings 15.07.2002
Decrease: Switching differential will become smaller
• Pumps are switched on and off more often
• Room temperature varies within a narrower band
Increase: Switching differential will become greater
• Pumps are switched on and off less often
• Room temperature varies within a wider band
With pump heating circuits, the amount of heat supplied is controlled by switching the
pumps on and off. This is accomplished with two-position control by means of the room
temperature's switching differential.
Room temperature acquisition requires a room unit.
OFF
ON
P
°C
TRx
TRw+SDR
2371D02
TRw
t
°C
2379Z19
ON
OFF
w
TRx
P
[]
Pump ON TRx = TRw
Pump OFF TRx = TRw + SDR
4.30 Minimum limitation of the flow temperature
setpoint
• Prevents too low flow temperatures
Minimum and maximum limitation define the range within which the flow temperature
setpoint may vary.
Room temperature
control
 Note
Functioning:
Switching differential
Benefit
Description
TRx Actual value of the room temperature
TRw Room
temperature setpoint
SDR Switching
differential of room temperature
P Pump (ON / OFF)
w
Setpoint
Switch-on point
Switch-off point
Legend
TRx Actual value of the room temperature
TRw Room temperature setpoint
SDR Switching differential of room
temperature
ON Switch-on point
OFF Switch-off point
t Time
P Pump