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Pump head influence on cooling load

If we have the pump "Fraction of Motor Inefficiencies to the Fluid Stream" set to 0, why would the pump head have an effect on the cooling load.

In the attached, energy plus version 9, test file that uses purchased cooling the "cooling load" changed from 1,018,159 kBtu to 990,412 kBtu . The only thing I changed was to zero out the pump head.

C:\fakepath\tb.idf.bmp

Pump head influence on cooling load

If we have the pump "Fraction of Motor Inefficiencies to the Fluid Stream" set to 0, why would the pump head have an effect on the cooling load.

In the attached, energy plus version 9, test file that uses purchased cooling the "cooling load" changed from 1,018,159 kBtu to 990,412 kBtu . The only thing I changed was to zero out the pump head.

C:\fakepath\tb.idf.bmp