grundfos upm3 hydra gps external pwm signal controlled solar boilers 3 Temperaturdifferenzregler This makes it possible to

This makes it possible to heat domestic hot water and operate radiators or underfloor heating

and activating special functions like "System Off" or "Away"

An additional advantage: The pump does not require separate motor protection because it is short-circuit proof

The documentation also explicitly emphasizes the need for professional commissioning and user instruction

Installation must be carried out by a qualified heating contractor

grundfos upm3 hydra gps external pwm signal controlled solar boilers 3 Temperaturdifferenzregler This makes it possible toSolar pump 20 8 130 PWM Hydra GPS II The Hydra GPS solar pump 20 8 130 PWM is an electronic and energy efficient pump with high efficiency. Designed for solar heating applications, it is controlled via an external PWM signal (stepless speed control), ensuring maximum energy yield. Its excellent price performance ratio makes it a popular replacement in many systems, such as the Grundfos UPM3 Solar 15 75. Advantages of the solar pump: EEI0. 21 developed