Grundfos ALPHA1 GO 25-40 180 compact central heating circulation pump 4 m 2.7 m3/h IP44
- Circulation pump for heating and air-conditioning systems, provides fluid circulation; maximum head of 4 m.
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Grundfos ALPHA1 GO 25-40 180 (93074185) - Circulation pump for heating systems
Grundfos ALPHA1 GO 25-40 180 is a state-of-the-art, high-efficiency circulation pump with ECM motor, designed for circulating liquids in heating and air-conditioning systems. The device offers three modes of operation - constant pressure, proportional pressure and constant curve - which allows precise adjustment to the characteristics of the system. Using energy-saving electronic commutation technology (EEI ≤ 0.20), the pump consumes up to 80% less energy than traditional UPS models.
- Maximum head: 4 m
- Maximum flow rate: 2.7 m³/h
- ECM motor with energy efficiency class EEI ≤ 0.20
- Operating modes: constant pressure, proportional pressure, constant curve
- Automatic venting and dry-running protection
Product description
The ALPHA1 GO 25-40 180 pump is a compact solution developed for modern heating systems, including radiator and floor heating systems. The device is equipped with a control panel with LEDs and a mode selection button for intuitive operation. Thanks to the Robust Start function, the pump automatically removes blockages caused by deposits or magnetite. Built-in safety features - such as dry-run (code E4) and impeller blockage (code E1) protection - ensure high reliability and long life of the unit.
Features
The device offers the possibility to set three pressure modes: constant, proportional and constant speed curve. The automation used allows the pump operation to be adjusted to the current demand of the system, reducing energy consumption. The built-in diagnostic panel with LED display informs about the current power consumption (W) and error codes. The pump is compatible with apLication Grundfos GO RepL ace, which allows you to easily match the model when replacing older UPS series pumps.
Technical data
| Category | Parameter |
|---|---|
| Model | Grundfos ALPHA1 GO 25-40 180 |
| Catalog number | 93074185 |
| Power supply | 1 × 220-240 V ±6%, 50/60 Hz |
| Maximum head | 4,0 m |
| Maximum flow rate | 2.7 m³/h |
| Power consumption | 3-27 W |
| Inrush current | < 4 A |
| Energy efficiency class | EEI ≤ 0.20 |
| Insulation class | F |
| Protection class | IP44 (for indoor use) |
| Working pressure | 1.0 MPa (10 bar) |
| Temperature of the medium | 2°C - 110°C |
| Ambient temperature | up to 55°C |
| Minimum inlet pressure | 0.05 bar (75°C) / 0.5 bar (95°C) / 1.08 bar (110°C) |
| Noise level | < 25 dB(A) |
| Pump casing | Electro-coated cast iron |
| Shaft and bearings | Ceramic |
| Impeller | PES-glass fiber composite |
| Seals | EPDM |
| Hydraulic connections | Thread G 1½" (DN25) |
| Installation length | 180 mm |
| Weight | approx. 1.9 kg |
| Certifications | CE, VDE |
Source of technical data: manual and data sheet of ALPHA1 GO 25-40 180 model.link
FAQ - Frequently asked questions
- What are the modes of operation of the pump? The pump operates in proportional pressure, constant pressure and constant curve modes.
- Does the pump have an automatic venting function? Yes, it is self-bleeding during operation.
- What is the maximum flow rate and head? 2.7 m³/h and 4.0 m.
- Is the pump quiet? Yes, it emits less than 25 dB(A).
- Is there dry-run protection? Yes, automatic detection and restart (code E4).
- Can it replace an older UPS model? Yes, fully compatible with apLication aid Grundfos GO RepLace.
- What are the hydraulic connections? Thread G 1½" (DN25), installation length 180 mm.
- Does the pump require external motor protection? No, it has built-in protection.
- What errors can the pump signal? E1 - impeller blockage, E2 - under-voltage, E4 - dry-running, E3 - over-voltage.
- Is the pump energy efficient? Yes, it has an EEI class ≤ 0.20 and an ECM motor.
Summary
Grundfos ALPHA1 GO 25-40 180 is a compact, energy-efficient circulation pump with functions of automatic venting, dry-running protection and three-stage control. Thanks to its modern ECM motor and intelligent operating modes, it ensures optimal flow and low energy consumption in domestic and commercial heating systems.