Item.5 DL-ZLAC05 General Air Conditioning Trainer Technical Document
1. Scope of Supply
The Contractor shall supply, deliver, install, test, commission, and hand over complete General Air Conditioning Training System, including:
· Fully operational air-conditioning and humidity control training unit
· Integrated refrigeration system
· RS485 data acquisition system
· Refrigeration monitoring software
· Instrument control panel
· Standard accessories and documentation
The equipment shall be factory assembled, fully piped and wired, tested, and ready for immediate laboratory operation.
2. General Description
The General Air Conditioning Trainer shall be designed for vocational and technical training in:
· Refrigeration cycle operation
· Heating, cooling, humidification, and dehumidification processes
· Electrical control circuits for refrigeration systems
· Refrigeration performance measurement and analysis
· Computer-based data acquisition and monitoring
The system shall simulate the complete air-conditioning process including cooling, heating, humidification, and dehumidification stages.
Refrigerant shall be R134a or equivalent environmentally acceptable refrigerant.
3. Mechanical Construction
3.1 Workbench Structure
· Rigid aluminum profile and steel structure frame
· Approximate dimensions:
1500 (L) × 750 (W) × 1650 (H) mm
· Mounted on four (4) heavy-duty casters:
o Two (2) with brakes
o Two (2) without brakes
· Fully installed refrigeration piping and electrical connections
· Refrigeration circuit diagram and electrical schematic provided
· Refrigeration pipelines color-coded:
o Red: High pressure
o Blue: Low pressure
3.2 Visibility and Monitoring
· Sight glass installed for refrigerant state observation
· Clearly labeled components
· Screen-printed panel for instructional reference
4. Electrical Requirements
· Power Supply: Single-phase 220V ±10%, 50Hz
· Rated Current: 16A
· Leakage circuit breaker 16A
· Key switch (self-locking type)
· Emergency stop button (self-locking type)
· Overload protector 10A
· Indicator lights (5 pcs)
· DC power supply:
o Output voltage: 24V
o Output current: 3A
5. Refrigeration and Air Treatment Components
The system shall include, at:
5.1 Sealed Compressor
· Power: 1 HP
· Voltage: 220V ±10%, Single-phase
· Refrigerant: R134a or equivalent
5.2 Condenser (with Fan)
· Power Supply: 220V AC ±10%
5.3 Evaporator (with Fan)
· Power Supply: 220V ±10%
5.4 Humidification Units
· Primary humidifier:
o Dimensions: approx. 300 × 260 × 300 mm
o Capacity: 2.3 liters
· Secondary humidifier:
o Capacity: 1 liter
5.5 Heater
· Single-phase 220V ±10%
5.6 Solenoid Valve
· 220V ±10%
· Welded connection
5.7 Manual Valves
· Flared thread connection
· Pipe diameter: Φ6 mm
· Quantity: 3 pcs
6. Instrumentation and Control
The system shall include:
6.1 Pressure Measurement
· High-pressure gauge:
o Range: 0–3.8 MPa
o Flared thread connection
· Low-pressure gauge:
o Range: 0–1.8 MPa
· High and low pressure controllers
· Pressure transducer sensors:
o Range: 0–2 MPa
o Output: 4–20 mA (2 pcs)
6.2 Temperature Measurement
· Digital temperature displays (4 pcs):
o Range: -50°C to +110°C
o Accuracy: ±0.5°C
o Resolution: 0.1°C
o NTC thermistor with protective sheath
· Temperature controller:
o Heating output: AC220V
o Cooling output: AC220V
o Humidification output: AC220V
6.3 Electrical Monitoring
· Pointer voltmeter: 0–250V
· Pointer ammeter: 0–10A
· Power monitoring module (24V supply)
· Analog input module (24V supply)
· Fan speed governor:
o Input: 220V
o Output: 10–220V adjustable
7. RS485 or Standard Data Acquisition System
The system shall include an integrated RS485 or Standard data acquisition system enabling communication between the refrigeration system and a computer.
The system shall transmit the following parameters to the computer:
· Voltage
· Current
· Phase angle
· Frequency
· Power
· High and low pressure
· Time
The system schematic diagram shall be viewable on the computer interface.
The system shall allow data logging and printing via computer terminal.
8. Refrigeration Monitoring Software
The supply shall include licensed Refrigeration Monitoring Software, capable of:
· Real-time system parameter display
· Data recording and storage
· Graphical system diagram display
· Printing of recorded data
· RS485 communication integration
Software shall be compatible with standard Windows-based PC systems. That PC will be supplied with this system.
9. Functional Capabilities
The system shall enable the following laboratory exercises:
· Identification and study of air-conditioning system components
· Observation of refrigerant states in the compression cycle
· Study of heating, cooling, humidification, and dehumidification processes
· Determination of:
o Refrigeration effect
o Work input
o Actual and theoretical cycle power
o Relative cycle power
o Refrigeration capacity
o Equipment efficiency
· Computer-based data acquisition and analysis
