What is the factory default setting on the UPS3 15-50/65?
The pump is factory set to constant curve III. At speed III, the pump runs at a constant speed on the maximum curve under all operating conditions. Quick venting of the pump can also be obtained by setting the pump to speed III for a short period. (Page 7, 11, 15)
From the official Grundfos Ups3 15 50 65 manual, page 7
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