EQJW146F001 EN
19
Systems
5 Systems
Different hydraulic schematics are available.
The plants can be designed as primary or secondary systems. The main hydraulic differ-
ences between the primary and second systems are shown in Fig. 3.
1. A mixing valve replaces the heat exchanger in the heating circuit/DHW circuit.
2. A storage tank charging pump replaces the solenoid valve/thermoelectric valve in the
primary system.
Do not change the controller settings.
BE
BA
AE
RK
BE
BA
AE
RK
RüF1
VF1
UP1
RK1/10Vout
RF1
RK1/10Vout
RüF1
VF1
UP1
RF1
Primary system
Secondary system
1.
BE
BA
AE
RK
WW
KW
SF1
SLP
BE
BA
AE
RK
WW
KW
SF1
SLP
Primary system
Secondary system
2.
Fig. 2:
Differences between primary and second systems
