Application solution
Intelligent Constant-Pressure Water Supply
Building water-supply integrators (mid-rise / high-rise residential, multi-building communities, HVAC primary/secondary loops) needing variable-frequency pump control with built-in PID, master-slave cascading, and remote monitoring — without the structural load and secondary-pollution risk of rooftop water tanks.
Variable-frequency constant-pressure pump control with <em>built-in PID algorithm on the inverter</em> — no external PLC required for basic systems. <em>KC100-W1</em> supports <em>1-master / 5-slave cascading</em> with automatic pump rotation, dry-run protection, and 150% rated-load operation across full frequency range. <em>GREEN series HMI</em> adds MQTT cloud connectivity. Eliminates the rooftop water tank — no structural load, no secondary-pollution risk, energy-efficient.
The application demands · what we engineer
Control Topology Options
- Multi-pump parallel: 1 variable-speed (PID master) + N fixed-speed slaves — economical for medium/large systems
- One-to-one: each pump on its own drive — better redundancy, simpler wiring, fits smaller systems
- KC100-W1 cascading: up to 1 master + 5 slaves with automatic pump rotation
Pressure Sensing & Built-in PID
- 4–20 mA pressure transducer (IP65, sized at ~1.5× operating pressure)
- Transducer signal connects directly to KC100-W1 — no external PID controller required
- Built-in PID executes closed loop locally on the inverter
Safety & Energy Functions
- Anti-freeze protection
- Dry-run / water-shortage detection
- Over-voltage / under-voltage protection
System architecture
Controller → WATER UTILITY components over a shared control / motion bus. Derived from the recommended BOM.
Architecture as text
- DRIVE: Kinco KC100-W1 — Dedicated HVAC/water VFD · built-in PID · 1M/5S cascade · 4DI/1AI/1DO/1AO/1Pulse/1RS485
- HMI: Kinco GREEN Series HMI — Multi-size · IoT cloud · MQTT · trend/alarm log
- IOT: Kinco MK Series IoT All-in-One — Optional · HMI + PLC + M-IoT for unmanned remote sites · auto/manual mode
- SENSOR: Pressure transducer 4–20 mA — IP65 · range 1.5× operating pressure · sizing by site
- PSU: 24 VDC power supply — For HMI / sensor loop / control logic
- OPTIONAL: External Kinco AK PLC — If >6 pumps, multi-zone control, BMS/SCADA gateway, or fire-mode logic required
Bill of materials
The engineered stack — components appear here as evidence. Each links to its product family.
| Role | Component | Key spec |
|---|---|---|
| DRIVE | Kinco KC100-W1 | Dedicated HVAC/water VFD · built-in PID · 1M/5S cascade · 4DI/1AI/1DO/1AO/1Pulse/1RS485 |
| HMI | Kinco GREEN Series HMI | Multi-size · IoT cloud · MQTT · trend/alarm log |
| IOT | Kinco MK Series IoT All-in-One | Optional · HMI + PLC + M-IoT for unmanned remote sites · auto/manual mode |
| SENSOR | Pressure transducer 4–20 mA | IP65 · range 1.5× operating pressure · sizing by site |
| PSU | 24 VDC power supply | For HMI / sensor loop / control logic |
| OPTIONAL | External Kinco AK PLC | If >6 pumps, multi-zone control, BMS/SCADA gateway, or fire-mode logic required |
Candidate BOM, subject to engineering review. Kinco performance and installed-base figures reflect the manufacturer's product portfolio. Trademarks belong to their respective owners.
What we engineered & validated
KC100-W1 alone is sufficient for systems up to 6 pumps via 1M/5S cascade — no PLC needed.
Add external AK PLC only when: (a) >6 pumps, (b) multi-zone pressure control, (c) deep BMS/SCADA integration beyond Modbus, (d) custom logic such as fire-mode override.
4–20 mA pressure transducer loop wired in a separate cable bundle from VFD motor output (EMI isolation)
Eliminating rooftop water tank: requires hydraulic re-design (boost pump curve sizing, pressure setpoint per floor) and likely new riser piping.
Related
Frequently asked
Can KC100-W1 control multiple pumps without an external PLC?
Yes. KC100-W1 has built-in PID and master-slave functionality supporting up to 1 master + 5 slaves cascading, with automatic pump rotation, dry-run protection, and sleep mode (source: Kinco intelligent constant-pressure water-supply solution V1.1, 2024). An external PLC is only needed when system complexity exceeds standalone capability — for example, >6 pumps, multi-zone pressure control, or BMS integration beyond basic Modbus.
How does this compare to a rooftop water tank system?
Variable-frequency constant-pressure systems eliminate the rooftop tank, removing the structural load on the building, the secondary-pollution risk requiring periodic cleaning, and the high pumping energy consumption. Pressure stability is maintained via closed-loop PID feedback. Specific energy savings depend on demand profile and the baseline system being replaced, so savings must be evaluated for the application.
Can this integrate with existing building SCADA / BMS?
Yes. The KC100-W1 supports Modbus RTU (RS485) for basic integration. The GREEN HMI adds MQTT for IoT cloud connectivity. For deeper BMS integration (BACnet, KNX), an external Kinco AK PLC with appropriate gateway is recommended.
What we are
An independent engineering & sourcing partner. We architect the water utility stack, select and integrate the BOM across supplier lines, and validate the system before you commit.
Where it does not fit
Constant-flow systems running near rated load 24/7 (limited energy-saving benefit) Component certifications are per datasheet; system-level certification of your finished machine remains the integrator's responsibility, subject to engineering review.
How this solution is delivered
You describe the application, program or BOM; we confirm what the service covers — and what it does not.
An engineer reviews materials against our supplied lines and flags risks and limits.
You receive a scoped work plan with deliverables and boundaries — before any commitment.
Work is delivered against the agreed scope, with documentation and hand-off.
Related engineering services
These services define the review boundary around this reference architecture. Candidate selections remain subject to engineering review.
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Send your application and requirements. We will scope a candidate BOM, the required validation and an availability check before quotation.