Compressor Training System

1. SYSTEM OVERVIEW & DESCRIPTION

The ATTO LABWARE Compressor Training System is a fully operational, industrial-grade vertical TVET training unit designed for advanced refrigeration, HVAC, and technical engineering programs. Built on a heavy-duty, mobile aluminum profile chassis, this turnkey platform integrates a complete hermetic vapor-compression circuit to simulate a real-world air dehumidification process.

The system features fully piped, color-coded refrigeration lines, a printed electrical schematic with physical hardware test points, and an integrated 13.56 MHz RFID Power Management System for secured, credential-based equipment activation. This specialized bench provides students with hands-on technical training in compressor startup circuits, refrigerant charging/evacuation procedures, thermodynamic cycle evaluation, and real-time Mollier diagram plotting.

2. KEY FEATURES & TRAINING CAPABILITIES

• Dual-Process Simulation: Demonstrates standard refrigeration loop mechanics while simultaneously mapping the air dehumidification workflow using fan-coil units.

• Advanced Startup Circuit Training: Facilitates practical wiring, troubleshooting, and testing for both PTC and Current-Mode compressor startup configurations.

• Interactive Diagnostic Panel: Features a high-contrast printed refrigeration schematic and a dedicated electrical diagram equipped with physical insulated safety test points for multi-meter diagnostics.

• Turnkey Servicing Practice: Designed explicitly for industrial hands-on exercises including system evacuation, leak detection, and precision refrigerant charging.

• Secure Access Control: Features a mandatory hardware-level high-frequency RFID authentication console to log user access and authorize system power-up.

3. TECHNICAL SPECIFICATIONS

3.1 Mechanical & Structural Construction

• Chassis Framework: Industrial-grade anodized aluminum profile combined with durable sheet-metal structural reinforcement panels.

• Dimensions (Approx. Minimum): $750\text{ (W)}\times 1000\text{ (L)}\times 1550\text{ (H) mm}$.

• Mobility System: Mounted on four (4) heavy-duty industrial caster wheels (2 with positive brake locks, 2 without brakes) for flexible laboratory deployment.

• Piping & Labeling: High-grade copper lines, color-coded (Red for High-Pressure / Blue for Low-Pressure), with permanent, clear labels on all key refrigeration and electrical components.

3.2 Core Refrigeration Loop Components

• • Hermetic Compressor: $1/3\text{ HP}$ industrial motor power rating, compatible with eco-friendly R134a refrigerant (Operating Voltage: 220V AC, 50Hz).

  • Condenser Unit: Premium fan-coil type heat exchanger with standard $\text{Minimum }1/4″$ inlet and outlet refrigerant ports.

  • Evaporator Unit: High-efficiency fan-coil type cooling grid integrated into a shared localized airflow path with the condenser to optimize the dehumidification simulation.

  • Forced Air Circulation: Dual 220V AC industrial axial fan units (approx. $120\times 120\text{ mm}$) dedicated to the evaporator and condenser coil blocks.

  • Expansion Device: Precision-calibrated capillary tube throttling unit.

  • Fluid Conditioning & Monitoring:

    • $1/4″$ Service-ported inline filter-drier.

    • Low-pressure service port ($\text{Minimum }1/4″$).

    • Two (2) heavy-duty manual isolate valves with leak-free flare-threaded connections ($\text{Minimum }1/4″$ pipe diameter).

    • Robust welded-type transparent sight glass for real-time refrigerant state monitoring.

3.3 Control Console & Electrical Safety Requirements

• Main Power Input: Single-phase $220\text{V}\pm 10\%,50\text{Hz}$.

• System Rated Current: $16\text{A}$ Minimum baseline.

• Safety Circuitry: Integrated Residual Current / Earth Leakage Circuit Breaker (RCCB/ELCB, $16\text{A}$ minimum rating).

• Primary System Control: Heavy-duty, self-locking type master Key Switch preventing unauthorized use.

• Emergency Shutdown: High-visibility, self-locking type Emergency Stop mushroom button.

• Thermal Protection: Overload protector switch rated at a $\text{Minimum }5\text{A}$.

• Visual Indicators: Console mounted panel LED status lights (Minimum 5 pcs) for active circuit monitoring.

• Wiring Terminals: Fully insulated, touch-safe electrical safety plug connections for all active terminal test points.

3.4 Instrumentation & Metrology Interface

• Low-Pressure Gauge: Permanently panel-embedded dial dial gauge (Range: $-30\text{ to }260\text{ psi}/-0.1\text{ to }1.8\text{ MPa}$).

• High-Pressure Gauge: Permanently panel-embedded dial gauge (Range: $-30\text{ to }550\text{ psi}/-0.1\text{ to }3.8\text{ MPa}$).

• Analog Voltmeter: Industrial pointer-type meter panel tracking voltage ($0\text{–}250\text{V}$).

• Analog Ammeter: Industrial pointer-type meter panel tracking system current draw ($0\text{–}10\text{A}$).

• Multi-Channel Digital Temperature Display Console:

  • Measurement Range: −50∘C to +110∘C

  • System Accuracy: ±0.5∘C

  • Display Resolution: 0.1∘C

  • Sensor Probes: Four (4) dedicated PT100 / NTC stainless-steel sheathed thermal inserts strategically placed at critical loop nodes.

3.5 Mandatory RFID Power Management Console

• • Operational Carrier Frequency: 13.56 MHz High-Frequency standard.

  • Hardware Interface: Dedicated panel-mounted OLED Display mapping real-time alphanumeric user data, active card numbers, authorization statuses, and system error codes.

  • Industrial Communication Bus: Built-in RS485 communication link supporting multi-device networks.

  • Supported Firmware Protocols: Full compliance with ISO-15693, ModBus_RTU, and ModBus_TCP protocols.

  • Data Integrity & Security: Automated command-based verification routines alongside direct OLED read/write data comparison checks.

  • User Feedback Interface: Integrated audible buzzer status prompts paired with multi-color diagnostic LED indicator lights.

  • Configuration Software: Bundled specialized parameter configuration and automated function testing software utilities.

4. STANDARD ACCESSORIES INCLUDED

1. Dual Compound Pressure Gauge Manifold Set: Professional service manifold set calibrated for multi-refrigerant analysis (R404A, R407C, R134a, R22).
2. Industrial AC Digital Clamp Meter: Complete handheld diagnostic meter supporting: AC/DC Voltage up to $600 {V} AC Current up to 600 {A} Capacitance up to 60,000, mu {F} Resistance up to 60, {M}\Omega Integrated diode testing continuity functions.

3. Digital Handheld Anemometer: Precision airflow analysis device featuring:

   • Wind Speed Range: $0.3\text{ to }45\text{ m/s}$ (Ultra-precise $0.001\text{ m/s}$ resolution)

   • Air Temperature Tracking: 0.0 to 45∘C (±2∘C accuracy)

   • High-contrast backlit LCD screen.

4. Digital Handheld Anemometer: Precision airflow analysis device featuring:

   • Wind Speed Range: 0.3 { to } 45 {m/s} (Ultra-precise 0.001 {m/s} resolution)

   • Air Temperature Tracking: 0.0 { to } 45^C  (+-2^C} accuracy)

   • High-contrast backlit LCD screen.

5. High-Vacuum Service Pump: Single-stage 1 {L} capacity laboratory vacuum pump for circuit dehydration.
6. Refrigerant Supply Unit: One (1) sealed cylinder unit of premium R134a gas compound.
7. Neon Electrical Test Lamp: Heavy-duty insulated voltage tester pen (12 {–}250 {V}).
8. Comprehensive Experimental Manual: One (1) master copy covering comprehensive step-by-step laboratory coursework, wiring guides, formulas, and performance plotting templates.

5. LAB EXPERIMENTS & LESSON PLANS

• Experiment 01: Layout Inspection and Functional Mapping of Vapor Compression Components.

• Experiment 02: Wiring, Commissioning, and Diagnostic Profiling of PTC Compressor Components.

• Experiment 03: Technical Setup and Operation of Current-Mode Compressor Startup Systems.

• Experiment 04: Thermodynamic Analysis of Air Dehumidification and Latent Heat Transfer Processes.

• Experiment 05: Precision Evacuation, Dehydration, and Charging Practices using the Vacuum Module.

• Experiment 06: Plotting Point-by-Point Refrigeration Cycles on a Physical Mollier Diagram.

• Experiment 07: Quantitative Estimation of the System Coefficient of Performance (COP).

• Experiment 08: Analyzing RFID ModBus_RTU registers and managing authorized credential databases.