Solar Circulating Pumps

Fundamental Facts:

A low power pump transfers thermal energy from a solar collector to a storage tank through a heat transfer liquid. Grundfos Series UP Circulators are preferred circulators for open and closed loop solar domestic hot water systems. The stainless steel and bronze pumps are used in open loop solar system.

GRUNDFOS
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Applications:

• Hydronic heating
  Offers individual temperature control through select hot water zoning loops

• Hot water recirculation (instant hot water)
  Potable water heating and water conservation

• Fan coil heating and hot water recirc-systems
  Potable water heating and water conservation

• Solar heating
  Providing efficient heat transfer for residential hot water and swimming pool applications

• Radiant heating systems
  Providing hot water for heating through floor-installed zoning loop

El-SID Pump works beautifully with PV panels and its speed (flow rate) changes with the sun's brightness. This works well with solar water heating systems because when the sun is dim and not able to heat much water, the pump automatically slows down.