18
4
A
MFA
X1:
N
1
N
2
N
L
3
N
L
4
5
6
TSU
eBus
TKO
TPO
PS
PS
PWT
TWT
TSU
TPU
TPU
TPO
VRA
VSP
VRA
M
THR
M
M
TWT
THR
TKO
VSP
PWT
AB
B
A
AB
B
X2:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
•
Three way valve
•
Heating return temperature increase
The WRSol 2.0 determines the temperature differential
between the collector sensor (TKO) and the reference
sensor (TSU, TPU).
As soon as the temperature differential is greater than the
value set (
... Diff. On
), the solar pump is switched on
and the tank is loaded. Once the (
... Temp. Setpoint
)
is reached, the three way valve changes over and loads
the calorifier provided, in accordance with the priority
setting (
➭
Ch. 7.12).
If loading is to sensor TSU the pump PWT runs at mini-
mum speed (30%), until the tank setpoint temperature has
been reached at the sensor (TWT).
Depending on the average pump speed and the minimum
storage tank temperature, the external heat exchanger can
be blocked via the potential free
Multi-funct. Output
(MFA).
In addition an 18 hour block can be activated.
The DHW function (Ch. 7.14) can also influence the MFA
output.
With the three way valve used for return temperature
increase (VRA) the energy available from the calorifier can
be used depending on the calorifier temperature (TPO)
and the heating return sensor (THR).
Possible settings MFA output:
0, 1, 2, 5, 6, 7, 8, 9, 10, 11, 12
Variation 11: Storage tank cascade for DHW via plate heat exchanger and heating support
WW
KW
MFA
TKV*
TPU
TKO
eBus
TKO
PS
TKV*
TPU
TKR*
VIZ*
TKR*
VIZ*
PS
X1:
N
1
N
2
N
3
N
4
5
6
X2:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
•
Energy yield calculation (optional;
➭
Ch. 7.10)
The WRSol 2.0 determines the temperature differential
between the collector sensor (TKO) and the reference
sensor (TPU). If a collector return sensor is fitted this can
be included in the control.
As soon as the temperature differential is greater than the
value set (
Calorifier Diff. On
), the solar pump is
switched on and the tank is topped up until the switch off
condition (
Calorifier Diff. Off
) or the maximum
temperature of the calorifier has been reached.
The external heat exchanger can be blocked via the
potential free
Multi-funct. Output
(MFA).
Possible settings MFA output:
0, 5, 6, 7, 8, 9, 10, 11, 12
Variation 12: DHW calorifier
* optional
