Cove.tool refers the standard ISO 13790 for pump energy calculation. According to ISO 13790, the pump flow energy is the auxiliary energy source whose distribution losses leads to the pump EUI numbers. 

The adjustment factors present in the tool are to quantify the losses in stages.

No Pump:
It indicates there are no distribution loss in energy because the system doesn't have any pump.
Auto Pump 50 Percent:
It indicates the pumps are controlled according to the demand and it leads to intermediate losses.
All Other Cases:
It indicates the maximum amount of loss resulting from the distribution as it is not controlled. 

To summarize, the increasing order for the pump energy would be:
No Pumps < Auto Pump 50 Percent < All Other Cases. 

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