Grundfos Alpha Solar 25-75 180 Circulation Pump, 1 x 230 V,

Grundfos Alpha Solar 25-75 180 Circulation Pump, 1 x 230 V, 9 H

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Grundfos High Efficiency Circulation Pump Alpha Solar 25-75 180 mm
The Grundfos Alpha Solar high-efficiency circulation pump is suitable for use in solar systems with variable or constant volume flow. However, high-efficiency pumps with electronically commutated motor (ECM), such as the Alpha Solar, must not be controlled via an external speed controller that changes or varies the supply voltage. The speed can be controlled via a pulse width modulated signal (PWM signal) supplied by the solar system controller to optimise the solar energy yield and the system temperature. This also significantly reduces the power consumption of the pump.

If no PWM signal is available, the Alpha Solar can be set to one of four constant speeds. The pump is then only switched on or off via the control.

- High-efficiency EC permanent magnet motor technology.
- Energy efficiency index (EEI) ≤ 0.20 according to EN 16297-3: 2012 Best in Class
- PWM signal C. The PWM signal is a method of generating an analog signal from a digital source
- 4 constant speeds.
- Maintenance-free.
- Low noise.
- Easy to install.
- Deblocking screw.

Technical details:
Maximum discharge height: 7.5 m.
Pump housing: grey cast iron.
Max. Operating pressure: 10 bar.
Nominal width: G 1 1/2 inch.
Installation length: 180 mm.
Media temperature range: 2 - 110 °C
Media temperature: 60 °C.
Power consumption P1: 2 - 45 watts.
Maximum current consumption: 0.04 - 0.52 A.
Mains frequency: 50 Hz.
Rated voltage: 1 x 230 V.
Protection class (IEC 34-5): X4D.
Energy (EEI): 0.20.

Box contents:
1 x pump.
1 x Alpha Male PWM Male
2 x sealing rings.
1 x user manual.