Siemens RVA53.242 - 4.55 Boost of the flow temperature setpoint for d.h.w. heating (UEBW)

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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of heating engineer settings 26.03.2001
50 °C
56 °C
60 °C
70 °C
SD = 6 °C
∆
T > 0 °C
TBWw
2371Z36
TBWw + UEBW
TRw -SD
TRw
UEBW >= 10 °C
UEBW = boost of the flow temperature setpoint
TBWw = nominal setpoint of the d.h.w. temperature
TR
W
- SD = setpoint of the control thermostat minus the switching differential
TRw = setpoint of control thermostat (point of calibration)
4.55 Boost of the flow temperature setpoint for
d.h.w. heating (UEBW)
Efficient d.h.w. heating.
To allow the d.h.w. to be heated up, the boiler temperature must be higher than the
d.h.w. setpoint.
Setting range Unit Factory setting
0...30 °C (K) 16
The setting will raise the boiler temperature setpoint when there is demand for d.h.w.
Increase: Heating up time will become shorter
More overshoot
Decrease: Heating up time will become longer
Less overshoot
Using the two settings, the controller generates the boiler temperature setpoint for
d.h.w. heating.
Setting on line 26 Reduced setpoint of d.h.w.
temperature
Setting on line 126 Boost
Total Boiler temperature setpoint
For d.h.w. control, refer to “switching differential of d.h.w.” in index.
D.h.w. control thermostat
(example)
Benefit
Description
Setting
Effect
Boiler boost
Note