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Heating characteristic (mode 1)
led 1 flashes
When the PWM signal is switched off, the pump runs at maximum speed .
this ensures that the system can function in an emergency, even if the controller
is defective or the connection cable is broken .
as the PWM signal rises, the speed of the pump falls .
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 d .
MAX
speed
Min
A = Maximum speed
B = variable speed Min – MAX
c = Minimum speed
d = Hysteresis on – off
e = stand-by mode off
eveneS heatinG PUMP he-ht 41
pWM (%)
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