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Siemens
Basic Documentation RVP360
CE1P2546en
Building Technologies
15 Function block: Multifunctional relay
2017-07-24
15.2.6 Type of d.h.w. charging
The type of d.h.w. charging is to be entered on operating line 141. Basically, 2
choices are available:
Charging via the heating system, or
Charging in alternating mode via the heating system or
with the electric immersion heater
The setting has no impact on solar d.h.w. charging.
This is put into operation, independently of this setting, provided the respective
switch-on criteria are satisfied.
The setting to be made on operating line 141 is 0...5.
The d.h.w. storage tank is charged via the heating system throughout the year.
The setting to be made on operating line 141 is 7, 8, or 9.
In the winter, the d.h.w. storage tank is charged via the heating system, and in the
summer with the electric immersion heater.
Switching over takes place according to the following criteria:
Switching from charging via the heating system to the electric immersion heater
takes place when there is no demand for space heating for at least 48 hours
(switching over at midnight)
Switching from the electric immersion heater to charging via the heating system
is effected when there is a request for space heating. Depending on the setting
made on operating line 141 (7, 8 or 9), different types of heat requests are consid-
ered for the switchover criterion:
Op. line 141 Criterion for switching over
7
Heat request from the controller’s own heating circuit
8
Heat requests from all controllers
having the same segment
number
and being connected to the data bus (LPB), including
those from the controller’s own heating circuit
9
Heat requests from all controllers connected to the data bus
(LPB), including those from the controller’s own heating circuit
Note
Charging via the
heating system
Charging in
alternating mode