Wagner & Co RATIOfresh 250 Technical Information Installation Instructions page 28

P1 : Solar circulation pump
P2 : Buffer discharge pump to heat potable water
P3 : Cylinder charge pump
P4 : Heating circuit pump
P5 : Hot water circulation pump
Vr : 3-way switching valve
(temperature increase heating return)
Vu : 3-way switching valve
(return switching circulation mode)
Heating circuit
Tvl
P4
AB
A
Vr
Figure 15 Solar installation for hot water heating and heating support. System solution in conjunction with oil or gas boiler, buffer cylinder RATIO
HP G and freshwater station RATIOfresh. Water is heated using an electronically controlled flow process. The controller of the freshwater station
maintains a constant withdrawal temperature and especially low buffer cylinder return temperatures. Solar energy for room heating is utilized by
raising the return temperature of the heating circuit when the temperature in the buffer cylinder is sufficiently high.
P1 : Solar circulation pump
P2 : Buffer discharge pump to heat potable water
P3 : Cylinder charge pump
P4 : Heating circuit pump
P5 : Hot water circulation pump
V1 : 3-way switching valve
(Hot water aux. heating or space heating)
Heating circuit
P4
M1
M
HW
AB
B
A
V2
Figure 16 Solar installation for water heating and space heating support. System solution with gas boiler, open fireplace with heating inset, RATIO
HP Buffer Storage, fresh water station RATIOfresh and a floor heating circuit. Hot water preparation is done by electronically controlled flow-
through method. The fireplace heats the upper part of the buffer storage, solar energy can heat the entire volume of the storage cylinder. When the
temperatures in the storage are high enough, the return flow of the heating circuit is directed through the storage via the switching valve V1. The en-
ergy of the buffer storage is utilized for space heating. The solar controller additionally controls loading of the buffer via the fireplace inset.
28
Solar controller
Ta
P3
P2
Oil or gas
heating boiler
B
Circulation
Cold water
Hot water
V2 : 3-way switching valve
(temperature increase heating return)
V3 : Mixing valve for keeping a min. return flow temperature
M1 : Heating circuit mixing valve
HW : Hydraulic compensator
RV : Regulating valve
Gas boiler
RV
Fireplace with
heating inset
V1
Subject to modifications, errors excepted · © Wagner & Co, 2008 · www.wagner-solar.com
WAGNER & CO · Zimmermannstraße 12 · D-35091 Cölbe/Marburg ·
Collector field
Vu
P5
Solar controller
P3
P2
V3
P5
Circulation
Cold water
Hot water
T-storage
P1 P1
Ttw
Collector field
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+49 6421 80 07-0 · Fax 80 07-22
P1 P1