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Grundfos UPS3 Instructions Manual
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Grundfos UPS3 Instructions Manual

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GRUNDFOS INSTRUCTIONS
UPS3

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Victor
February 13, 2025

I have had a UPS3 pump fitted a few months ago after a flush out of the radiators.. Been on constant curve 2. However all of a sudden started to make a humming sound that goes through the pipes and very annoying. If turn it down to one then not so bad but then radiators not hot enough. Have put it up to 3 for a while to get rid of any air but still the same when put back to number 2. Any ideas why this is happening

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1 comments:
Mr. Anderson
February 13, 2025

A humming sound in a Grundfos UPS3 pump when set to curve 2 could be caused by several factors, including:

1. Air Trapped in the System – Air pockets in the pump or pipework can create noise. Bleeding the system may help.
2. Incorrect Installation – Ensure the pump is installed with a horizontal motor shaft and that gaskets are properly fitted.
3. System Pressure or Flow Issues – If the system has low pressure or restrictions, the pump may struggle, causing noise.
4. PWM Signal Interference – If the pump is externally controlled via PWM, incorrect settings might cause irregular operation and noise.
5. Mechanical Issues – Loose fittings or internal components, such as bearings, may cause vibrations leading to a humming sound.

Checking installation, bleeding the system, and verifying proper settings may help resolve the issue.

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Summary of Contents for Grundfos UPS3

  • Page 1 GRUNDFOS INSTRUCTIONS UPS3...
  • Page 2 way and understand the GB: Warning hazards involved. Children This appliance can be shall not play with the used by children aged appliance. Cleaning and user from 8 years and above maintenance shall not be and persons with reduced made by children without physical, sensory or supervision.
  • Page 3 Min. / Max. +2 °C / +95 °C Max. 1.0 MPa (10 bar) Max. 95 % RH IPX4D Max. 2000 m...
  • Page 4 Max. 50 % Glycol Max. 10 mm ² /s Viscosity 75 °C 95°C Min. / Max. 0 °C / +55 °C 0.005 MPa 0.05 MPa 0.05 bar 0.5 bar < 32 dB(A)
  • Page 5 I/On O/Off...
  • Page 9 42 mm 32 mm 8 mm 1/On 0.5 - 1.5 mm Ø 5.5 - 10 mm 0/Off...
  • Page 10 INTERNALLY EXTERNALLY CONTROLLED CONTROLLED PWM A PROFILE 1 x 230 V - 15 %/+ 10 % 1 x 230 V - 15 %/+ 10 % ∽ 50/60 Hz ∽ 50/60 Hz...
  • Page 11 1 x 230 V - 15 %/+ 10 % ∽ 50/60 Hz I/On O/Off...
  • Page 12 CO N T RO L M O D E S E T T I N G S PP 1 CONSTANT CURVE 1 PP 2 CONSTANT CURVE 2 CP 1 3 s. CONSTANT CURVE 3 CP 2 PWM A PROFILE net.grundfos.com/qr/i/99423997...
  • Page 13 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 Q [m³/h]...
  • Page 14 FAULT DISPLAY SOLUTION 1/On 5 mm No.2 ALARM STATUS 0/Off Blocked Supply voltage low <160 V Electrical error 1/On 0/Off...
  • Page 15 Nous, Grundfos, déclarons sous notre HR: EU deklaracija sukladnosti responsabilidad, que los productos GFNHB, seule responsabilité, que les produits We, Grundfos, declare under our sole My firma Grundfos prohlašujeme na Vi, Grundfos, erklærer under ansvar Mi, Grundfos, izjavljujemo s punom...
  • Page 16 RO: Declaraţia de conformitate UE RU: Декларация SI: Izjava o skladnosti EU о соответствии нормам ЕС Grundfos dichiara sotto la sua esclusiva Sabiedrība Grundfos ar pilnu atbildību My, Grundfos, oświadczamy z pełną Noi Grundfos declarăm pe propria V Grundfosu s polno odgovornostjo responsabilità...
  • Page 17 EEI ≤ 0.23 (see individual data sheet or Grundfos olarak, aşağıdaki bildirim • EN 60335-1:2012+A11:2014+A13:2017+A1: name plate). konusu olan GFNHB, GFNKB, GFNKC, Ми, компанія Grundfos, під нашу 2019+A14:2019+A2:2019 The benchmark for the most efficient GFNJB, GFNJC, GFNJD, GFNJF, GFNJG, одноосібну відповідальність •...
  • Page 18 GB: The crossed-out wheelie bin symbol on a product means that it Standards used: We, Grundfos, declare under our sole responsibility that must be disposed of separately from BS EN 16297-1: 2012, BS EN 16297-2: 2012, BS EN 16297-3: 2012 the products to which the declaration below relates, is in household waste.
  • Page 19 Lithuania GRUNDFOS Pumps Pompes GRUNDFOS Tel: (+48-61) 650 13 00 GRUNDFOS Pumps (Taiwan) Corporation Slovakia N. V . GRUNDFOS Bellux S.A. (Shanghai) Co. Ltd. Distribution S.A. PT GRUNDFOS Pompa GRUNDFOS Pumps UAB Fax: (+48-61) 650 13 50 Ltd. Phone: +1-913-227-3400 Tél.: +32-3-870 7300...