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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.43 Setpoint and time switch program for d.h.w.
heating with a BMU
Instead of using the RVP540 / RVP550 for d.h.w. control, a BMU can be used.
If desired, the BMU can make use of the d.h.w. time switch program and the d.h.w.
temperature setpoints of the controller.
Setting range
Unit
Factory setting
0 / 1
–
0
The setting defines whether d.h.w. heating with the BMU shall adopt the setpoints and
the time switch programs from the controller:
0
The BMU uses its own charging program.
The d.h.w. time switch program and the d.h.w. temperature setpoints of the con-
troller have no influence.
1
The BMU uses the d.h.w. time switch program and the d.h.w. temperature set-
points of the controller.
The actual value of the d.h.w. temperature is displayed by the controller.
The relevant data are transmitted via LPB or PPS.
With both settings, all matching solar collector partial diagrams, and the partial dia-
grams without Q3, that is,
BwSp 1 – 3 and 7 – 8,
as well as
KoSp 1 – 3
, can still be
selected on the controller, thus making certain that the use of solar energy is always
guaranteed.
4.44 Function of system pump Q14
The switch-on / off criteria of the system pump change depending on the location of the
pump. The relevant configuration is made via this operating line.
Setting range
Unit
Factory setting
1...3 –
1
Entry:
1
System pump for heating circuits only
The system pump is activated as soon as a heating circuit (including that of an-
other LPB controller) is put into operation. The system pump does
not
run when
the d.h.w. storage tank calls for heat.
When all heating circuits are switched off, the system pump will also be shut down.
2
System pump for heating circuit and d.h.w.
The system pump is activated as soon as a heating circuit (including that of an-
other LPB controller) is put into operation or d.h.w. heating is started.
As soon as all heating circuits are switched off and d.h.w. heating is completed or
interrupted, the system pump will also be deactivated.
3
System pump for external heat demand
The system pump runs parallel to an external heat demand signal (via LPB or in-
put H1, operating lines 870…873). The system pump does
not
run when the
controller-internal heating circuit or the d.h.w. storage tank calls for heat.
Auxiliary function “System pump” is to be activated on operating line 149.
Description
Setting
Effect
Note
Description
Setting
Effect
Note
