Operating instructions

29
730.138 | 08.12
EN
System 7: 1 collector array – 2 storage tanks –
intelligent valve control
Description of the solar function: When the switch-on temperature
difference between the collector array A1 (T1) and one of the two
storage tanks B1, B2 (T2, T3) is exceeded, the solar circuit pump R1 is
switched on and the switching valve R2 is set to the correct position
depending on the storage tank to be loaded. Both storage tanks B1, B2
are loaded one after the other, according to the priority control (chapter
7.5 "Storage tank priority"), until either the relevant switch-off tempera-
ture difference between the collector array A1 (T1) and storage tanks B1,
B2 (T2, T3) is reached, or a safety limit is reached.
NOTE
When no voltage is on the system, the switching valve R2 must be set
to storage tank B1.
Loading strategy of solar circuit pump R1:
In the factory, tempera-
ture differential control is chosen as the loading strategy for the storage
tanks B1, B2. It can be adjusted or changed to target temperature con-
trol using the "Parameters" menu (chapter 7.4 "Parameters").
Activating the system: see chapter 7.2. "Selecting a system".
Terminal layout
N L N
R1
N
n.c.
n.c.
X
L
L
n.c.
1
2
3
4
5
T1
T2
T3
D1
R2
R1
230 V~ 115 V~
A1
B1
B2
R1
R2
T3
n.c.
n.c.
T2
T1
R2
n.c.
n.c.
Display: 2.2.2Display: 2.2.2

A1: collector array
B1: storage tank 1
B2: storage tank 2
D1: wire bridge
R1: solar circuit pump
R2: switching valve
T1: collector sensor
T2: sensor lower area of storage
tank 1
T3: sensor lower area of storage
tank 2
A1: collector array
B1: storage tank 1
B2: storage tank 2
D1: wire bridge
R1: solar circuit pump
R2: switching valve
T1: collector sensor
T2: sensor lower area of storage
tank 1
T3: sensor lower area of storage
tank 2