Solar Characteristic (Mode 2) - WITA Delta Maxi 80 Série Traduction Des Instructions De Service D'origine

8.2

Solar characteristic (mode 2)

Display HE Pumpen
When the PWM signal is switched off, the pump is in stand-by mode. This ensures that the
system does not overheat, even if the controller is defective or the connection cable is broken.
As the PWM signal rises, so does the speed of the pump. The following characteristic shows
how the pump reacts to the various PWM signal levels. To prevent the system from cycling,
the characteristic has a hysteresis in zone B.
A = Stand-by mode OFF
B = Hysteresis ON – OFF
C = Minimum speed
D = Variable speed MIN – MAX
E = Maximum speed
Pump outputs with different PWM signals:
Characteristik WITA Delta MAXI 80 PWM Mode 2
H
(m)
7
> 90% PWM (MAX Characteristic)
6
80% PWM
5
4
60% PWM
3
40% PWM
2
1
20% PWM
10% PWM (MIN Characteristic)
0
0 1
< 5% PWM Pump is switched off
WITA Delta Maxi 80-XX
MAX
speed
MIN
0 10
A B C
2 3 4
Operating instrutions
LED 1 flashes
20 30 40 50 60 70
D
7
5 6
80 90 100 PWM (%)
E
3
8 Qm /h
33