8
en
3.7
Minimum temperature limitation
With DIP switch 4, the temperature limitation can be
activated as a minimum temperature limitation. The
limit temperature can be adjusted by means of the
potentiometer C. The sensor connected to the termi-
nals S1 is used as the reference sensor. The minimum
collector temperature is the minimum switch-on tem-
perature which must be exceeded for the solar pump
(R1) to switch on.
C
ON
OFF
1
2
3
4
E
ON
OFF
1
2
3
4
A
4
Examples
4.1
Standard solar system with 1 store
7
RO RC N N L
8 9 10 11
⌯
2
2
2
3
3
S1
RO
S2
⌯
Use grounding terminals!
The controller calculates the temperature difference
between collector sensor S1 and store sensor S2. If
the difference is larger than or identical to the adjust-
ed switch-on temperature difference, the pump (R1)
will be switched on and the store will be loaded. If the
temperature difference falls by 1.6 K (non-adjustable
hysteresis) below the adjusted temperature difference,
the pump will be switched off.
S1 = Collector sensor
S2 = Store sensor
RO = Solar pump
ON
OFF
1
2
3
4
C
Deactivated by default (DIP
switch in OFF position), de-
fault setting upon activation:
60 °C
3.8
Minimum speed (speed control via PWM signal)
With potentiometre D, a relative minimum speed can
be adjusted for a HE pump connected to the relay. If
the temperature difference reaches or exceeds the
switch-on temperature difference, the pump switches
on at 100 % speed for 10 s. Then, the speed is reduced
to the minimum pump speed value. If the temperature
difference reaches the adjusted nominal value, the
pump speed increases by one step (10 %).
By means of the three-pole jumper on the left-hand side above the output termi-
nals, the PWM profile for the HE pump can be selected.
Jumper position left: Output signal not inverted (solar pump)
Jumper position right: Output signal inverted (heating pump)
3.9
PWM profile
S
H
Adjustment range:
20 … 100 %
Factory setting: 30 %
D
Mains
Input
100 %
Heating
Solar
PWM / 0-10 V
output
100%
0%
ON
OFF
1
2
3
4
A
ON
OFF
1
2
3
4
ON
OFF
1
2
3
4