This condo tower (324 units on 13 floors) had completed a previous retrofit that unfortunately left the variable speed pumps operating in a fixed mode at low speed, so the hvac system couldn’t cool the west-
facing units in the summer.
Armstrong installed new Design Envelope pumps and used the Sensorless variable speed and auto-balancing capabilities to determine optimal flow rates. Operating in variable speed, demand-based mode, the pumps now provide 64% more flow but use 25% less power.