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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
Functions
4.223 Reduced setpoint of d.h.w. temperature
TBWR
•
High d.h.w. temperatures only if required
•
Energy savings due to lower temperatures in the remaining time
Reduction of the d.h.w. temperatures outside main occupancy times.
The time switch integrated in the controller automatically switches between main and
secondary occupancy times. For more detailed information, refer to "D.h.w. heating
program", operating lines 20...25.
If the d.h.w. is heated by means of a control thermostat connected to terminal B3, re-
duced setpoint operation will not be possible.
Setting range
Unit
Factory setting
8...TBWw °C 40
TBWw
Nominal setpoint of the d.h.w. temperature (setting on operating line 26)
The temperature setpoint during reduced d.h.w. operation will be changed.
0 10 20 30 40 50 60 70 80 90 100 120
130
140 °C
23
92
Z29
26
Setting "Nominal d.h.w. temperature setpoint”
770
Setting "Reduced d.h.w. temperature setpoint”
750
EXP
Setting "Maximum nominal setpoint of the d.h.w. temperature”
D.h.w. heating has 2 different setpoints that can be used:
•
Nominal setpoint of the d.h.w. temperature (setting on operating line 26)
Produces the d.h.w. temperature required during the main occupancy times
•
Reduced d.h.w. temperature setpoint (setting on operating line 770)
Produces the d.h.w. temperature required outside the main occupancy times
The time of release of d.h.w. charging to the nominal setpoint can be set on operating
line 771.
Benefit
Description
Note
Setting
Effect
D.h.w. temperature
setpoints
