Split Air Conditioning Installation and Maintenance Course

Lesson 1 • Split AC System Overview

Introduces the architecture of split air conditioning systems, distinguishing indoor and outdoor units. Provides context for component-level study in later chapters.

Lesson 2 • Tools and Measuring Instruments

Introduces essential HVAC hand tools, gauges, and diagnostic instruments used throughout installation and maintenance. Builds tool familiarity before hands-on lab work.

Lesson 3 • Thermodynamic Principles for HVAC

Covers heat transfer modes, enthalpy, and the laws of thermodynamics as applied to cooling systems. Establishes the physics foundation required for all subsequent refrigeration topics.

Lesson 4 • The Vapor-Compression Refrigeration Cycle

Explains the four-stage refrigeration cycle: compression, condensation, expansion, and evaporation. Connects thermodynamic theory to real system operation.

Lesson 1 • Reading Wiring Diagrams and Schematics

Teaches interpretation of ladder diagrams, schematic symbols, and wiring legends specific to split AC systems. Enables accurate circuit tracing during installation and fault diagnosis.

Lesson 2 • Inverter Drive Technology

Explains variable-frequency drive operation in inverter-type split AC compressors and fan motors. Prepares students for modern inverter system installation and diagnostics.

Lesson 3 • Power Supply and Circuit Requirements

Covers voltage ratings, ampacity, breaker sizing, and dedicated circuit requirements for split AC units. Ensures installations meet electrical load specifications.

Lesson 4 • Electrical Safety and Lockout Procedures

Establishes safe work practices for energized and de-energized HVAC equipment. Lockout/tagout procedures are mandatory prerequisites for all electrical tasks.

Lesson 1 • Cooling Load Calculation Basics

Introduces Manual J methodology and heat gain factors to size split AC units correctly. Accurate load calculation prevents oversizing and undersizing errors.

Lesson 2 • Refrigerant Line Set Planning

Addresses line set routing, maximum length limits, elevation differences, and insulation requirements. Proper planning prevents capacity loss and oil return issues.

Lesson 3 • Permits, Codes, and Documentation

Reviews regulatory requirements, permit processes, and documentation standards applicable to HVAC installations. Ensures legal compliance and project traceability.

Lesson 4 • Indoor Unit Location Selection

Evaluates airflow patterns, structural support, and clearance requirements for indoor unit placement. Correct placement maximizes comfort and system efficiency.

Lesson 1 • Connecting Refrigerant Line Sets

Covers flare nut torque specifications, union connections, and line set insulation wrapping. Correct connections prevent refrigerant leaks and condensation on suction lines.

Lesson 2 • Copper Pipe Cutting, Bending, and Flaring

Teaches precision copper tube preparation techniques critical for leak-free refrigerant connections. Flaring quality directly affects system reliability and refrigerant containment.

Lesson 3 • Condensate Drain System Installation

Explains drain pan, drain line routing, trap installation, and condensate pump use where gravity drainage is insufficient. Proper drainage prevents water damage and mold growth.

Lesson 4 • Mounting Indoor Units Securely

Covers wall bracket installation, leveling, and load-bearing verification for wall-mounted indoor units. Correct mounting prevents vibration, noise, and structural damage.

Lesson 1 • Pre-Energization Electrical Checks

Establishes a systematic checklist to verify wiring integrity before applying power to the system. Prevents equipment damage and safety incidents during first energization.

Lesson 2 • Interconnecting Indoor and Outdoor Units

Details communication and power cable routing between indoor and outdoor units per wiring diagrams. Correct interconnection enables proper control signal exchange.

Lesson 3 • Grounding and Bonding Verification

Verifies equipment grounding conductor continuity and bonding of metallic components. Proper grounding protects personnel and equipment from fault currents.

Lesson 4 • Thermostat and Control Wiring

Explains thermostat terminal assignments, low-voltage wiring, and smart control integration. Proper control wiring enables accurate temperature regulation and remote operation.

Lesson 1 • Pressure Testing for Leaks

Covers nitrogen pressure testing procedures to verify refrigerant circuit integrity before evacuation. Leak-free circuits are mandatory before introducing refrigerant.

Lesson 2 • Refrigerant Charging Methods

Explains weighing-in, subcooling, and superheat charging methods for accurate refrigerant charge. Correct charge level is critical for efficiency and compressor longevity.

Lesson 3 • First Startup and Operational Checks

Guides the initial system startup sequence and verification of operating parameters against specifications. Confirms the system performs within design limits before handover.

Lesson 4 • Commissioning Documentation

Produces startup reports, refrigerant charge logs, and handover documents required for warranty and compliance. Complete records protect the technician and the customer.

Lesson 1 • Electrical Component Inspection

Verifies capacitor health, contactor condition, wiring integrity, and control board status during maintenance visits. Proactive electrical checks prevent in-season failures.

Lesson 2 • Refrigerant System Performance Check

Measures operating pressures, superheat, subcooling, and temperature differential to assess refrigerant charge and system health. Performance data guides corrective action decisions.

Lesson 3 • Indoor Unit Cleaning and Inspection

Covers filter cleaning, evaporator coil washing, blower wheel inspection, and drain pan sanitization. Clean indoor components maintain airflow, efficiency, and indoor air quality.

Lesson 4 • Outdoor Unit Cleaning and Inspection

Details condenser coil washing, fan blade inspection, and cabinet cleaning procedures for outdoor units. Clean outdoor components restore heat rejection capacity and reduce energy use.

Lesson 1 • Airflow and Comfort Complaints

Resolves insufficient cooling, uneven temperature distribution, noise, and humidity complaints through airflow and mechanical inspection. Comfort complaints require both technical and communication skills.

Lesson 2 • Refrigerant System Faults

Diagnoses and corrects low charge, overcharge, refrigerant contamination, and restriction faults. Refrigerant faults are among the most common causes of poor system performance.

Lesson 3 • Compressor Faults and Testing

Covers compressor electrical testing, mechanical failure indicators, and replacement decision criteria. Compressor diagnosis prevents unnecessary replacement and costly callbacks.

Lesson 4 • Electrical and Control System Faults

Diagnoses failed capacitors, contactors, control boards, sensors, and wiring faults using systematic electrical testing. Accurate electrical diagnosis minimizes parts replacement cost.