Technical Specification

Brief introduction

Central air conditioning system training device can simulate real process of building central air conditioning system. It can demonstrate "summer refrigeration cycle" and "winter heating cycle" process of the central air conditioning. The system includes the electrical control system and central air conditioning system. The students can learn various skills of central air conditioning system design, load calculation, electrical design, piping design, energy management and cost estimates.

Technical parameter:

1.1) Input power: AC380V±10%,50Hz ,≥6.5KW

1.2) Cooling capacity: ≥7.5KW

1.3) Rated heating power: 2.0KW

1.4) Flow rate: 700m³/h

1.5) Refrigerant: R22

1.6) Dimension: approximately 6000mm*2400mm*2500mm

1.7) Safety protection: overvoltage, over current, overload, leakage and grounding.

1.8) Working temperature: Ambient temperature: -5 ℃ ~ 40 ℃.

Training contents:

- Understand the structure and composition of the central air conditioning.

- Starting and stopping the central air conditioning;

- Running and adjustment operation of the central air conditioning

- Testing the running conditions and running parameters of the central air conditioning

- PLC for advanced programming and PLC installation, wiring and commissioning

- With pressure transmitters, temperature sensors and the corresponding A / D conversion module, entire operating parameters collection, real-time monitoring and other training;

- Achieve the functions like the animated show of central air conditioning running, show running data, real-time monitoring, curve analysis, show historical records, alarm, print the configuration

- Training of network remote control

- Training of network installation and setting up

- Training of installation and using of sensors and transmitters

Fault analysis and solutions:

Faults can be set for students to understand the various fault phenomenon and fault clearing Total number of typical faults is 20, including more than 8 faults in the refrigeration system and more than 12 faults in the electrical control system. Fault setting does not destroy piping system and electrical control system. Faults for reference are as follows:

1. High pressure protection’

2. Expansion valve clogged;

3. Compressor does not work;

4. Fans of combination of wind cabinet do not turn;

5. Condensing tower fan does not turn;

6. Simulated boiler does not work;

7. Cold water pump does not work;

8. Hot water pump does not work;

9. Condensate pump does not work;

10. Refrigeration control computer sensor head does not work;

11. Computer-controlled analog boiler sensor probe does not work;

12. Adjustment of expansion valve is not normal;

13. Compressor overload;

14. Compressor starting capacitor does not work;

15. System fan does not turn;

16. Cooling water is not circulating;

17. Heating water is not circulating;

18. Refrigeration compressor contactor is not normal;

19. Analog boiler heating contactor does not work;

20. Condensation tower fan motor losses phase.