Filter
Top Products
Parameters
WE Parameter level / Range of values
DHW demand ON 40 °C PA4 / 20 to 90 °C
DHW demand OFF 45 °C PA4 / 20 to 90 °C
Charging temperature 55 °C PA4 / 20 to 90 °C
Heat exchanger charging pump
deactivation limit
50 °C PA4 / 20 to 90 °C
Storage tank charging pump
deactivation limit
50 °C PA4 / 20 to 90 °C
Maximum charging temperature 120 °C PA4 / 20 to 120 °C
6.2 DHW heating in the storage tank system
Start storage tank charging
The controller can be reconfigured for all systems with DHW heating to control a DHW storage
tank with heating register (storage tank system).
The controller switches the storage tank charging pump (SLP) on and off and controls the mixing
valve for the DHW circuit. A mixing valve in the DHW circuit does not exist in system Anl 2. The
sensor VFS is connected to terminal 28 and the storage tank charging pump to terminal 45.
The controller starts the storage tank charging when the water temperature measured at sensor
SF1 falls below the
DHW demand ON
by 0.1 °C. If the flow temperature in the system is higher
than the required charging temperature, the controller attempts to reduce it in the heating circuit
for maximum three minutes before the storage tank charging pump starts to run.
54 EB 5179 EN
Appendix
V
L
RL
SLP
VFS
ZP
KW
Zirk.
TW
SF1
Fig. 6 · DHW heating in storage tank system, applies to systems Anl 4, 5, 7, 8, 9 and 10
Anl 2: without three-way valve
SLP Storage tank charging
pump
SF1 Storage sensor 1
VFS Flow sensor
ZP Circulation pump
KW Cold water
TW Domestic hot water (DHW)
VL Flow
RL Return flow