Hi Daniel,

?You could combine the primary and secondary pumps into an equivalent ("primary") pump and model Primary Only Variable Speed. ?

To determine the equivalent pump, multiply the head by flow for each primary and secondary pump. Add the results together and divide by the total secondary pump flow. The result will be the effective pump head. Use the total secondary pump flow for the flow.

Aaron

Aaron?Smith,?P.Eng
M&R?Engineering?Ltd.

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