Grundfos UPM GEO 25-85 180 Circulator Pump 240V 97776504 #4839

Grundfos UPM GEO 25-85 180 – 240V High-Efficiency Circulator Pump (97776504) #4839

This listing is for a Grundfos UPM GEO 25-85 180 high-efficiency canned-rotor circulator pump. The UPM GEO range is designed for cold-water applications, geothermal heat pumps, heating systems and air-conditioning systems where remote speed control is required via a low-voltage PWM signal.

Condition: supplied in as new surplus condition – the unit has not been installed or used but may show minor cosmetic markings from storage and handling. Guarantee: supplied with a 2-year guarantee.

• Pump type: UPM GEO high-efficiency canned-rotor circulator
• Connection: G 1 1/2 threaded ports
• Port-to-port length: 180 mm
• Electrical supply: 1 × 230 V~, 50/60 Hz
• Power input: P1 5.7–87 W
• Current: 0.06–0.71 A
• Maximum head: 8.5 m
• Maximum system pressure: 10 bar
• Liquid temperature range: -10 °C to +95 °C
• Enclosure / insulation class: IPX4D / H
• Energy efficiency index: EEI ≤ 0.23
• Motor: ECM permanent-magnet motor with integrated frequency converter
• Design: canned-rotor pump with no conventional shaft seal

Need help confirming suitability?
Call us on 01803 220416 for technical advice.

Technical specifications link

Full technical specifications and performance data can be viewed here:
View Grundfos UPM2 / UPM GEO / UPM2K technical data booklet

Control & installation notes

• Control method: low-voltage PWM signal from a system controller
• Signal cable: required for pump control; without it, the pump will run at maximum speed
• Signal cable cores: signal input, signal output and signal reference
• Reduced voltage operation: can run with reduced performance down to 160 VAC
• Power connection: connection method depends on the exact pump model and connector type
• Important: do not control this pump by varying the mains voltage, such as phase-cut or pulse-cascade control

Typical applications

• Geothermal heat pump systems
• Cold-water circulation duties
• Heating systems
• Air-conditioning systems
• Antifreeze / glycol-containing circuits, subject to temperature and mixture limits

Frequently Asked Questions

What does the model number mean?

• UPM GEO – high-efficiency circulator range optimised for cold-water / geothermal applications
• 25 – nominal diameter of suction and discharge ports, DN25 class
• 85 – maximum head class, 85 dm / 8.5 m
• 180 – port-to-port length in millimetres

What does 230 V~ mean?

230 V~ means 230 volt AC supply. This pump is rated for 50/60 Hz.

How is this pump controlled?

This pump is externally speed-controlled by a low-voltage PWM signal from a system controller, such as a heat pump or OEM control unit. A suitable three-core signal cable is required, with signal input, signal output and signal reference. Without the control signal, the pump will run at maximum speed.

Is this suitable as a replacement pump?

It may be suitable where the existing unit is a matching UPM GEO 25-85 180 or compatible OEM variant. Please compare the product number, port-to-port length, threaded connection, supply voltage, PWM control type and connector arrangement before ordering.

What liquids can this pump be used with?

The UPM GEO range is suitable for thin, clean, non-aggressive and non-explosive liquids that do not contain solid particles, fibres or mineral oil.

UPM GEO pumps can be used with water/antifreeze mixtures such as glycol or ethanol down to -10 °C. Higher viscosity from glycol mixtures can reduce performance and increase system pressure loss, so the mixture type, concentration and operating temperature should be checked against the system design.

Not suitable for:

• Liquids containing solid particles or fibres
• Mineral oil
• Flammable liquids such as diesel oil or petrol
• Aggressive chemicals that may attack the pump materials
• Dirty water, wastewater or drainage applications

Does this pump have a mechanical shaft seal?

No. UPM GEO is a canned-rotor circulator, where the pump and motor form an integrated unit without a conventional mechanical shaft seal.

Does the pump require external motor protection?

No external motor protection is normally required. The pump includes internal overload protection, but the electrical connection must still be carried out correctly and in accordance with local regulations.

About Our Stock

Stock code: #4839
We specialise in supplying new and unused surplus pumps. All units are inspected prior to dispatch and supplied with a 2-year guarantee.