Samson trovis 5600, Mounting And Operating Instructions

Page: 68 / 128

7 Functions of the DHW circuit
7.1 DHW heating in the storage tank system
Start storage tank charging
The controller begins charging the storage tank when the water temperature measured at sen-
sor S7 falls below 'DHW day set point' by 0.1 °C. When no heating operation takes place, the
storage tank charging pump P3 is switched on immediately.
If the flow temperature in the system is higher than the desired charging temperature (= 'DHW
day set point' + 'Charging temperature boost'), the controller tries to reduce the flow tempera-
ture in the heating circuit for up to five minutes before the storage tank charging pump P3 is acti-
vated.
If the flow temperature in the system is lower than the desired charging temperature, the control-
ler tries to build up the flow temperature in the heating circuit for up to five minutes before the
storage tank charging pump P3 is activated.
If the function DHW–CO4–16 = ON (
SLP not ON unless return flow hot)
is activated, the pri-
mary valve is opened without simultaneously operating the storage tank charging pump P3. The
storage tank charging pump P3 is not switched on before the primary return flow temperature
has reached the temperature currently measured at storage tank sensor S7. This function en-
ables storage tank charging when the heating system is switched off, e.g. in summer mode,
without cooling down the storage tank first by filling it with cold flow water.
68
EB 5610 EN
Functions of the DHW circuit
WW
KW
P1
P3
S3
S1
S2
P2
S7
S4/S5
Fig. 4 · Schematics of a storage tank system
P2 Circulation pump
P3 Storage tank charging
pump
S7 Storage tank sensor
WW Hot water
KW Cold water