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Appendix
Parameters
DHW demand ON
DHW demand OFF
Charging temperature
Heat exchanger charging pump
deactivation limit
Storage tank charging pump
deactivation limit
Maximum charging temperature
6.2 DHW heating in the storage tank system
VL
RL
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
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
WE
40 °C
45 °C
55 °C
50 °C
50 °C
120 °C PA4 / 20 to 120 °C
SLP VFS
SF1
Parameter level / Range of values
PA4 / 20 to 90 °C
PA4 / 20 to 90 °C
PA4 / 20 to 90 °C
PA4 / 20 to 90 °C
PA4 / 20 to 90 °C
SLP
TW
SF1
VFS
ZP
Zirk.
ZP
KW
KW
TW
VL
RL
Storage tank charging
pump
Storage sensor 1
Flow sensor
Circulation pump
Cold water
Domestic hot water (DHW)
Flow
Return flow
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