Samson TROVIS 5573, Mounting And Operating Instructions

Page: 81 / 146

EB 5573 EN 81
Functions of the DHW circuit
7.3 DHW heating in instantaneous heating system
WW
VF
ZP
KW
VF Flow sensor
ZP Circulation pump (DHW)
WW Hot water
KW Cold water
Fig. 11: Schematics of an instantaneous heating system
The control of the required 'DHW temperature' at the flow sensor VF is only active during
times-of-use of the circulation pump ZP.
Parameters WE Switch position: value range
DHW temperature set point 60.0 °C : Min. to max. DHW temperature
DHW temperature sustaining value 40.0 °C : Min. to max. DHW temperature
Parameters WE Parameter level: value range
Min. DHW temperature 40.0 °C PA4: 5.0 to 90.0 °C
Max. DHW temperature 60.0 °C PA4: 5.0 to 90.0 °C
7.4 Domestic hot water heating with solar system
The systems Anl 1.3 and 2.3 are fitted with a solar system for DHW heating. In these sys-
tems, the difference between the temperatures measured at storage sensor SF2 and the sen-
sor at the solar collector VF3 is determined. The 'Solar circuit pump ON' parameter deter-
mines the minimum temperature difference between sensors VF3 and SF2 required to acti-
vate the solar circuit pump. If the temperature difference falls below the value of 'Solar circuit
pump OFF', the solar circuit pump is switched off. Basically, the solar circuit pump is also
switched off when either the water temperature measured at sensor SF2 has reached the
'Max. storage tank temperature' or when the solar collector temperature rises above 120 °C.
The times-of-use of the DHW circuit do not affect the operation of the solar system.
After the key number 1999 has been entered, the operating hours of the solar pump are dis-
played in extended information level.
Note