System Solutions - Example - Wagner & Co RATIOfresh 250 Technical Information Installation Instructions

9. System Solutions – Example
P1 : Solar circuit pump
P2 : Cylinder charge pump
P3 : Heating circuit pump
P4 : Buffer discharge pump to heat potable water
P5 : Circulation pump
Vm : Mixing valve to maintain specific
min. return temperature
HKM : Heating circuit mixing valve
P5
T-storage
P4
Figure 13 Solar installation for hot water heating and heating support. System as heating buffer system with pellet boiler, buffer cylinder RATIO HP
G, and RATIOfresh freshwater station. Water is heated using an electronically controlled flow process. The RATIOfresh controller maintains a con-
stant withdrawal temperature and especially low buffer cylinder return temperatures as well as speed-controls the hot water circulation pump. The
pellet boiler heats only the upper buffer cylinder section.
P1 : Solar circuit pump
P2 : Secondary circuit pump
P3 : Buffer discharge pump to heat potable water
P4 : Cylinder charge pump
P5 : Heating circuit pump
P6 : Circulation pump
Vu1 : 3-way-valve, switching solar charging
Vu2 : 3-way-valve, switching solar charging parallel with Vu1
Vr : 3-way-valve, return flow increase
Heating circuit
AB
A
B
Vr
Figure 14 Solar installation for hot water heating and heating support. System with oil or gas boiler, 2 buffer cylinders RATIO HP, and freshwater sta-
tion RATIOfresh. Buffer cylinder 1 is first charged by the collector field. Water is heated using an electronically controlled flow process. The freshwa-
ter station controller not only ensures an energetically favorable discharging of the buffer cylinder when tapping hot water, it also runs the speed-
controlled hot water circulation pump. If temperatures in the primary buffer cylinder are sufficient, solar heat is used for heating by raising the heat-
ing return temperature.
EN-RATIOfresh-250-400_TI-MA-0809-11214900
T T
Vm
P2
T
P4
P5
Ta
P3
Oil or gas
heating boiler
P6
Circulation
Cold water
Hot water
Solar controller
Solar controller
T-Storage
Ttw
Buffer cylinder 1
Collector field
Heating circuit
T T
P3
HKM
Collector field
AB
A B
Vu1
Buffer cylinder 2
T5
A
P1 P1
P1
PWT
P2
AB
B
Vu2
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