Operating instructions
28
730.138 | 08.12
EN
7.2.2 Systems with two storage tanks
System 6: 1 collector array – 2 storage tanks –
intelligent pump control
Description of the solar function: When the switch-on temperature
difference between the collector array A1 (T1) and one of the two stor-
age tanks B1, B2 (T2, T3) is reached, the appropriate solar circuit pump
R1 or R2 is switched on. 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 temperature difference
between the collector array A1 (T1) and storage tanks B1, B2 (T2, T3) is
reached, or a safety limit is reached.
Loading strategy of solar circuit pump R1:
In the factory, temperature
differential control is chosen as the loading strategy for storage tank B1.
It can be adjusted or changed to target temperature control using the
"Parameters" menu (chapter 7.4 "Parameters").
Loading strategy of solar circuit pump R2:
It is not possible to select
whether temperature differential control or target temperature control
is to be used as the loading strategy for storage tank B2. Solar circuit
pump R2 operates according to the switch-on and switch-off tempera-
ture difference parameter values.
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
[Storage tank]
>@
Display: 2.2
[Storage tank]
Display: 2.2.1Display: 2.2.1
A1: collector array
B1: storage tank 1
B2: storage tank 2
D1: wire bridge
R1: solar circuit pump 1
R2: solar circuit pump 2
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 1
R2: solar circuit pump 2
T1: collector sensor
T2: sensor lower area of storage
tank 1
T3: sensor lower area of storage
tank 2