DIPU FAQ

1. What is Grundfos Distributed Pumping?

Grundfos Distributed Pumping solution is the new revolutionary offering for distribution of chilled water in HVAC applications without the need for pressure regulating valves. 
With a Distributed Pumping solution, you will gain:

  1. Up to 50% energy savings on your annual pumping power use by using the worlds’ most energy efficient pumps.
  2. Flow-driven pumping solution that gives you just the right flow to meet your heat load demand.
  3. Valve-less design, reducing system pressure and eliminating the need for costly balancing.
    Watch the application film  to find out more

2. Which Pumps are used for Grundfos Distributed Pumping

Grundfos Distributed Pumping is made possible with our connected pumps that gives optimal and intelligent distribution of chilled water to all terminal units.
For supplying each terminal unit, we utilised our MAGNA3 range as coils pumps. The MAGNA3 is a canned-rotor type, i.e. pump and motor form an integral unit without shaft seal and integrated variable speed drive and IE5 motor giving you the most efficient pump within its' class and it doesn't require maintenance. The MAGNA3 comes with all the needed control algorithms to modulate the chilled water flow as the heat load of the building changes, by using external temperature sensor to maintain constant supply or return air temperature.
For primary pumps we are able to drastically reduce the pumping power rating (kW) since they now only need to circulate the water in the primary side up to the de-coupler. We recommend using our in-line TPE range with IE5 motors and integrated VFD. The advantage of these pumps, are they don't require alignment and are perfectly balanced, giving the shaft-seal a much better lifetime.
Explore our Distributed Pumping products to learn more

3. How reliant is a Distributed Pumping system compared to a conventional system?

Canned-rotor type of circulates have been manufactured by Grundfos since 1959 and integrated speed drives was introduced in 1991, so the design is incredibly reliable and well tested. The current version of MAGNA3 was realeased in 2012 and more than 1 millions units have been sold worldwide for mixed applications. The expected lifetime of a MAGNA3 is 10 years, but the pump can easily operate longer than this, and is more than able to match the reliance of any type of control valve. Furthermore, if connected to a Building Management System (BMS), it will be able to detect any warnings or alarms on any of the pumps, which ensures the facility management can respond as needed.
Learn more about MAGNA3

4. Does a Distributed Pumping Solution require Hydraulic Balancing?

No. Because we use small circulators as coil pumps to supply chilled water to each terminal unit (ie. Air handling unit), your entire building will be perfectly balanced at any load. This also simplifies the design phase, as it is no longer necessary to determine the critical pressure point / index loop when doing the HVAC design. With Distributed Pumping, your whole system becomes decoupled and each pump is sized to deliver just the right flow.
Watch the application film  to find out more

5. Who can commission a Grundfos Distributed Pumping solution?

Our highly trained Grundfos Service and Solutions Engineers will do the commissioning of the Distributed Pumping Solution, which includes:

  1. A pre-commission visit, ensuring the installation of the pumps are in order.
  2. Initial configuration of the pumps according to the specifications in the design.
  3. Solution commissioning, ensuring the whole system is operating as per designed.
    Contact your local service team to know more

6. Which type of buildings are Distributed Pumping suitable for?

Grundfos Distributed Pumping is suitable for any building with a water based HVAC system, which either has a centralised chiller plant or is connected to a district cooling plant. Grundfos Distributed Pumping is also suitable for certian industrial process cooling applications, please contact your local Grundfos representive to hear more about this.
Download the Distributed Pumping brochure for further information

7. How is the Capital investment compared to a conventional system with valves?

Because a Grundfos Distributed Pumping system is replacing the valves with coil pumps and reduces the kW size of primary pumps, the Capital Investment will either be the same as a conventional system or around 20% more expensive, depending on the choice of valves in the conventional design.But the commissioning efforts needed for a Distributed Pumping Solution, will be much less, since there is no need for hydraulic balancing or determination of Set Points (ei. Constant differential by-pass pressure set point)With the energy savings and easy commissioning of a Distributed Pumping Solution, the Return of Investment is kept below 6 months.
Download the Distributed Pumping brochure for further information

8. Who will do the Distributed Pumping design for my building's HVAC?

Grundfos has a team of highly Trained Application specialist who uses our Grundfos Distributed Pumping Sizing tool, to do the pump sizing and selection. This ensures that you get the best possible Distributed Pumping Solution for your building, by tapping into our 75 years of pumping knowledge.
What our application speacialists need from you to do the design is:

  1. Chilled Water piping layout and schematics drawings
  2. HVAC Equipment data sheets and scheduling.
    We will also include a theoretical energy comparison of a conventional variable-primary system and Distributed Pumping for your building, to show what energy savings you are achieving.
    Download the whitepaper to get the details