50
PWM input signal (H - heating)
PWM input signal (H - heating)
At high PWM signal percentages (duty cycles), a hysteres is prevents the circulating pump
form starting and stopping if the input signal fluctuates around the shifting point. At low
PWM signal percentages, the circulating pump speed is high for safety reasons. In case
of a cable breakage in a gasboiler system, the circulating pump will continue to run at
maximum speed to transfer heat from theprimary heat exchanger.This is also suitable for
heat circulating pumps to ensure that the circulatingpump can transfer heat in case of
a cablebreakage.
PWM sygnał wejściowy (%)
Praca pompy
PWM = 0
Switch the pump to non-PWM mode (internal control) operation
0 < PWM ≤ 10
Maximum speed: max
10 < PWM ≤ 84
Variable speed: max to min
84 < PWM ≤ 91
Minimum speed: min
91 < PWM ≤ 95
Hysteresis area: on/off
95 < PWM ≤ 100
Standby mode: off
PWM input signal
[%]
Max
Speed (RP
M)
5 10
20
30
40
50
60
70
80
90
100
