Grundfos UPM3 - Electrical Connection; Wiring Diagram; Supply Voltage; Earth Leakage Circuit Breaker (ELCB)

PWM A Profile (heating)
The pump runs at constant speed curves depending on the current PWM value up to the preset constant
curve. The speed decreases when the PWM value increases. If PWM equals 0, the pump runs at
maximum speed.
PWM C Profile (solar)
The pump runs at constant speed curves depending on the current PWM value up to the preset constant
curve. Speed will increase with increasing PWM value. If PWM equals 0, the pump stops.
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