Grundfos ALPHA SOLAR 25-145 Manual

Grundfos Pumpe ALPHA SOLAR 25-145

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Side 1/2

GRUNDFOS DATA SHEET

New ALPHA SOLAR

Product description

The new ALPHA SOLAR is designed

to be integrated in all kinds of thermal

solar systems with either variable

(matched-flow) or constant flow rate.

High-efficiency ECM (Electronically

Commutated Motor) pumps, such as

ALPHA SOLAR, must not be speed-controlled by an

external speed controller varying or pulsing the supply

voltage.

The speed can be controlled by a low-voltage PWM

(Pulse Width Modulation) signal from a solar controller

to optimise the solar harvesting and temperature of the

system. As a result, the power consumption of the

pump will be reduced considerably.

If no PWM signal is available, ALPHA SOLAR can be

set to constant speed, only switched on and off by the

controller.

PWM input profile C (solar)

Features

• Constant speed.

• PWM C profile. The PWM signal is a method for

generating an analog signal using a digital source.

• Low EEI (Energy Efficiency Index).

• Maintenance-free.

• Low noise level.

• Very simple installation.

Technical data

Replacement table

TM06 5816 0216TM05 1575 3211

Max.

PWM input signal [%]

Speed

System pressure Maximum 1.0 MPa (10 bar)

Minimum inlet pressure

0.05 MPa (0.50 bar) at 95 °C liquid

temperature

Maximum liquid

temperature

2-110 °C at 70 °C ambient temperature

2-130 °C at 60 °C ambient temperature

Enclosure class IPX4D

Motor protection No external protection needed

Approval and marking VDE, CE

Water/propylene glycol

mixture

Maximum water/propylene glycol

mixture is 50 %.

Note: The water/propylene glycol

mixture reduces the performance due to

higher viscosity.

Old existing products Replaced by

52588352 SOLAR 25-120 98989297 ALPHA SOLAR 25-145 180

59508500 SOLAR 15-80 98989298 ALPHA SOLAR 15-75 130

59544183 SOLAR 25-40 98989300 ALPHA SOLAR 25-75 180

59546639 SOLAR 25-60 98989300 ALPHA SOLAR 25-75 180

96705819 SOLAR 15-60 98989298 ALPHA SOLAR 15-75 130

96817649 SOLAR 15-65 98989298 ALPHA SOLAR 15-75 130

96817652 SOLAR 25-65 98989299 ALPHA SOLAR 25-75 130

96817707 SOLAR 25-65 98989300 ALPHA SOLAR 25-75 180

96817710 SOLAR 15-45 98989298 ALPHA SOLAR 15-75 130

96817722 SOLAR 25-45 98989299 ALPHA SOLAR 25-75 130

96817725 SOLAR 25-45 98989300 ALPHA SOLAR 25-75 180

Subject to alterations.

GRUNDFOS A/S . DK-8850 Bjerringbro . Denmark

Telephone: +45 87 50 14 00

www.grundfos.com

99037005

0216

ECM: 1178520

The name Grundfos, the Grundfos logo, and be think innovate are registered trademarks owned by Grundfos Holding A/S or Grundfos A/S, Denmark. All rights reserved worldwide. © Copyright Grundfos Holding A/S