I. System Overview

The HD2000 series microcomputer frequency conversion water supply/make-up controller is specifically designed for frequency conversion constant pressure water supply systems and boiler/heat exchange system make-up. It can be used with various brands of frequency converters. It features high pressure control accuracy, stable pressure, second fire pressure (dynamic pressure) setting, automatic control of system overpressure drainage, password locking for parameter settings, and many other functions.

II. Main Performance Indicators

1. Programmable multiple pump operation modes, capable of driving up to 2 pumps (1 variable frequency + 1 fixed frequency);

2. Anti-shake compensation control function for pressure measurement values;

3. Password locking and protection for parameter adjustment and setting;

4. Utilizes artificial intelligence fuzzy control algorithm, with fewer setting parameters and high control accuracy. Built-in watchdog circuit, digital filtering, and multiple anti-interference measures to prevent software runaway;

5. Compatible with passive remote pressure gauges, active voltage, and current-type pressure transmitters;

6. D/A output control frequency voltage: DC 0-10V, can also be set to DC 0-5V;

7. Zero and full-scale compensation function for pressure sensors;

8. Timed automatic pump switching function;

9. Second pressure (fire pressure) setting and control function;

10. Automatic water shortage detection protection and external input shutdown protection functions;

11. During system make-up control, automatic overpressure drainage control function;

12. Auxiliary small pump control function for water supply, with options for variable frequency or fixed frequency mode;

13. Optional timed automatic start/stop control function;

14. Small flow pump sleep control function;

15. Handheld operator function for manual adjustment of output voltage to control the frequency converter;

16. Can replace electrical contact pressure gauges for upper and lower limit pressure control;

17. Time-sharing and pressure-dividing water supply control function, with up to six time segments;

III. Installation and Wiring Terminal Description

1. Controller dimensions: 160mm × 80mm × 80mm (HD2000);

2. Control panel cutout size: 152mm × 76mm, panel snap-in installation;

3. Operating environment: Locations free of water droplets, steam, corrosion, flammables, dust, and metal particles;

4. Operating temperature: -20℃ to 50℃;

5. Relative humidity: <95%;

6. Rated operating voltage: AC220V ±10%;

7. Rated power consumption: <= AC 5W;

8. Controller terminal output capacity: 3A/ AC220V;

9. Panel and wiring terminal description: