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Tech Tips

Tech Tips. Variable Speed Control Modes in HVAC Applications. Affinity Laws. FLOW. HEAD. POWER. PG: 113. %SPEED. Constant Speed Curve – ECM Motor. 35. Eff. 54.9 % 600 Watts. H(ft). 27. Eff. 67.0 % 610 Watts. Eff. 66.2 % 610 Watts. 20. Eff. 48.6 % 610 Watts. 11.5. P (W). 50.

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Tech Tips

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  1. Tech Tips Variable Speed Control Modes in HVAC Applications

  2. Affinity Laws FLOW HEAD POWER PG: 113 %SPEED

  3. Constant Speed Curve – ECM Motor 35 Eff. 54.9 % 600 Watts H(ft) 27 Eff. 67.0 % 610 Watts Eff. 66.2 % 610 Watts 20 Eff. 48.6 % 610 Watts 11.5 P (W) 50 80 110 140 Q (GPM)

  4. Constant Pressure H(ft) Head reduction 26% Flow reduction 9% Energy Savings of 38% 380 Watts Head reduction 43% Flow reduction 24% Energy Savings of 57% 266 Watts P (W) Q (GPM)

  5. Proportional Differential Pressure H(ft) Head reduction 45% Flow reduction 31% Energy Savings of 61% 239 Watts H Set 50 % H Set Head reduction 60% Flow reduction 32% Energy Savings of 76% 144 Watts P (W) Q (GPM)

  6. Intelligent Control - AUTOADAPT What is AUTOADAPT is a control function of the Grundfos MAGNA3

  7. Intelligent Control - AUTOADAPT H Max H(ft) 55 % H Max 5 Feet P (W) Q (GPM)

  8. Intelligent Control - AUTOADAPT 80 GPM at 9 feet head 214 Watts of power 65% savings H(ft) 41 GPM at 7.5 feet head 102 Watts of power 83% savings Old AUTO ADAPT Set Point New AUTO ADAPT Set Point 21 GPM at 6.5 feet head 68 Watts of power 85+% savings 5 Feet P (W) Q (GPM)

  9. www.grundfos.com

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