6
Functions of DHW heating
6.1
DHW heating in the storage tank system
Operation with a storage tank sensor SF1 (BE3 to ModBus I/O 1402-0328 (3))
The controller begins charging the storage tank when the water temperature measured at sen-
sor SF1 falls below
Min
.
storage tank
. The storage tank charging finishes when the water tem-
perature measured at the sensor SF1 has reached the limit in
Max
.
storage tank
.
The
Flow temperature set point
defines the set point at the flow sensor VFg.
Operation with two storage tank sensors SF1 (BE3 to ModBus I/O 1402-0328 (3)) and
SF2 (BE4 an ModBus I/O 1402-0328 (3))
The controller begins charging the storage tank when the water temperature measured at sen-
sor SF1 falls below
Min
.
storage tank
. The storage tank charging finishes when the water tem-
perature measured at the sensor SF2 has reached the limit in
Max
.
storage tank.
The
Flow temperature set point
defines the set point at the flow sensor VFg.
Operation with storage tank thermostat (BE3 to ModBus I/O 1402-0328 (3))
The storage tank thermostat is connected at SF1 and switches the storage tank charging on and
off. The
Flow temperature set point
must still be defined.
2
[Übersicht > Parameter > Warmwasserbereitung]
Parameters
WE
Adjustment range
Vorlauftemp.-Sollwert
(flow temperature set point)
65 °C
20 to 120 °C
Speicher min
(min. storage tank)
40 °C
20 to
90 °C
Speicher max
(max. storage tank)
45 °C
20 to
90 °C
6.1.1 Priority operation
In many systems, the allotted amount of water cannot meet DHW heating and heating operation
demands when they are required at the same time. As a result, the capacity required for DHW
heating needs to be taken from the heating system when great heating loads occur; and this, un-
til DHW heating has been concluded. For this purpose, the DHW heating can be given priority
by the set-back operation function. This is achieved by monitoring the temperature at storage
tank sensor SF1.
2
[Übersicht > Parameter > Warmwasserbereitung]
EB 5571-2 EN
33
Functions of DHW heating
