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Issue: Hot water slow (90-120 secs) to come to distant fixtures
Recirc system: 2 dedicated returns, merged to single pipe, feeding a 103258LF Bell & Gossett (NBF-9U/LW Pump 1/40 HP Motor) pump installed at the “Space Heating Return” inlet (where drain valve is) on our 50gal Bradford White water heater.
House: built in 2014, 3600sf, 2-story, 10 foot ceilings, upstairs bathrooms on opposite sides of the house, water heater on ground floor roughly centered. Kitchen about 25 feet from water heater. 2nd story bathrooms roughly 20-30 feet horizontally, & 12-15 feet vertically removed from water heater.

Pump seems to be oriented correctly (arrow pointing down toward the water heater) and it gets quite hot when it runs. It seems to be running normally, gently vibrating and very quiet. This system has never worked—no change in time to hot water whether pump is running or not. I don’t know where the 2 return lines come from—upstairs & kitchen (or maybe both upstairs)?

Is this pump sized right for our home? What else could be wrong?