Intelligent pump control that modulates speed based on real-time system demand — matching water flow to actual cooling load across primary, secondary, and condenser circuits. No more fixed-speed waste.
ZedBee automates all three pump circuits — each with distinct control logic tailored to its function in the chilled water system.
Constant-flow circuit serving the chiller evaporators. Speed modulated to maintain design flow rate per chiller. Auto-staging matches running pumps to running chillers — no excess pumping energy.
Variable-flow circuit distributing chilled water to AHUs. VFD speed modulated based on differential pressure (ΔP) at the furthest AHU. As VAVs close, demand drops and pump speed reduces automatically.
Serves the condenser water loop between chillers and cooling towers. Speed matched to chiller condenser requirements. Auto-staging syncs with CT sequencing for optimal heat rejection.
Every pump decision is driven by real-time sensor data — not fixed schedules or manual operator judgment.
Differential pressure sensors at the hydraulic end of the circuit provide real-time feedback. Pump speed adjusts to maintain design ΔP as system resistance changes with valve positions.
Auto add/remove pumps based on building cooling demand. Prevents running all pumps at partial speed (inefficient) — instead runs fewer pumps at optimal speed with auto-rotation for even wear.
Flow meters provide actual water volume data. Control algorithm ensures pump output matches actual system demand — preventing bypassing, dead-heading, and cavitation conditions.
Chilled water supply and return temperatures feed into the pump control loop. Ensures adequate flow for heat exchange while preventing excess flow that wastes pump energy.
Lead/lag rotation based on accumulated run hours. Ensures even wear distribution across pumps. Automatically selects the most efficient pump as lead based on performance data.
Auto-failover to standby pump on trip, overload, or communication loss. VFD soft-start prevents inrush current damage. Real-time alarm notifications to ZedBee Cloud.
Affinity laws: halving pump speed reduces power by 87%. VFD control captures this.
Pump energy is a major contributor to plant kW/Ton. Reducing it improves overall plant efficiency.
Soft-start, reduced mechanical stress, and even wear distribution extend motor and seal lifespan.
Run status, speed, current, voltage, power, flow, and pressure — all on ZedBee Cloud dashboards.
Full CPM deployment with VFD-controlled primary and secondary pumps. HMI dashboard at plant room with cloud connectivity. Auto-staging across 3 chillers and 9 pumps.
Improper pump control identified as key high-side challenge. ZedBee implemented load-based staging and VFD modulation across primary and secondary circuits.
VFD control, ΔP-based modulation, and auto-staging — deployed without operational disruption.