Siemens RVP360 Basic Documentation page 62

Note
62/106
Siemens
Building Technologies
Setting Type of charging
0 D.h.w. charging with 1 sensor
1 D.h.w. charging with 2 sensors
2 D.h.w. charging with 1 thermostat
3 D.h.w. charging with 2 thermostats
4 Solar d.h.w. charging with 1 sensor *
5 Solar d.h.w. charging with 2 sensors *
* The settings for solar d.h.w. charging are to be made on operating lines 201 - 208
The switch-on and switch-off temperatures for charging via sensors are calculated
as follows:
SD
BW
ON
OFF
T = T
T
ON OFF
ON
D.h.w. charging ON
OFF
D.h.w charging OFF
SD
Switching differential of d.h.w. charging (operating line 128)
BW
T
Switch-on temperature
ON
T
Switch-off temperature
OFF
T
NORMAL or REDUCED setpoint of d.h.w. temperature (operating line 26 or 28)
BWw
T
D.h.w. temperature (operating line 27)
BWx
T
Measured value storage tank sensor 1 (B31)
BWx1
T
Measured value storage tank sensor 2 (B32)
BWx2
Fixing the switch-on temperature (start of d.h.w. charging):
Op. line 126 Acquisition
0 1 sensor
1 2 sensors
2 1 thermostat
3 2 thermostats
4 Solar via 1 sen. T
5 Solar via 2 sen. T
Fixing the switch-off temperature (end of d.h.w. charging):
Op. line 126 Acquisition
0 1 sensor
1 2 sensors
2 1 thermostat
3 2 thermostats
4 Solar via 1 sen. T
5 Solar via 2 sen. T
From the 2 tables above, it is apparent that when using 2 sensors, it is of no im-
portance which is fitted at the top and which at the bottom of the storage tank.
If the storage tank is equipped with a thermostat, it is the thermostat that deter-
mines the switch-on/off temperature.
Basic Documentation RVP360
14 Function block: D.h.w.
T
BWx
BWw
Switching criterion
T < (T – SD
BWx1 BWw
T < (T – SD
BWx1 BWw
Thermostat contact B31 closed
Thermostat contacts B31 and B32 closed
< (T – SD
BWx1 BWw
< (T – SD
BWx1 BWw
Switching criterion
T > T
BWx1 BWw
T > T and T
BWx1 BWw
Thermostat contact B31 open
Thermostat contacts B31 and B32 open
> T
BWx1 BWw
> T and T
BWx1 BWw
)
BW
) and T < (T – SD
BW BWx2 BWw
)
BW
) and T < (T – SD
BW BWx2 BWw
> T
BWx2 BWw
> T
BWx2 BWw
CE1P2546en
2017-07-24
)
BW
)
BW