Siemens RVD230 Basic Documentation page 40

Control of the storage
tank charging pump
40/130
Siemens Building Technologies
HVAC Products
The d.h.w. flow temperature setpoint should be maintained as accurately as possible,
allowing the storage tank can be fully charged in one go. At the beginning of d.h.w.
heating, the storage tank charging pump starts at minimum speed until the d.h.w. flow
temperature setpoint is reached. Then, the pump speed is continuously increased.
During the charging process, the storage tank charging pump reduces its speed only if
there is not sufficient heat available.
The storage tank charging pump is controlled according to the d.h.w. flow temperature.
The following setpoints and actual values are used:
Plant type Actual value (sensor)
x–6, 3–7, x–8, x–12 B3
B12
2–7, 6–7, x–10
Basic Documentation RVD230
11 Function block Plant configuration
Setpoint
Current d.h.w. setpoint
Current d.h.w. setpoint
CE1P2383en
27.05.2004