Lesson 1Electrical requirements: dedicated circuit, wire sizing, disconnect, grounding, surge protectionDescribe electrical requirements fi safe, code-compliant split AC installations. Cover dedicated circuits, breaker sizing, conductor sizing, disconnect placement, grounding, bonding, surge protection, and labeling fi service.
Dedicated circuit and breaker sizingConductor sizing and insulation typeOutdoor disconnect location and ratingEquipment grounding and bondingSurge protection and labelingLesson 2Evacuation and pressure testing: vacuum pump use, micron gauge procedure, nitrogen pressure checks and leak detection methodsDetail evacuation and pressure testing steps fi ensure a dry, tight system. Cover nitrogen pressure tests, soap and electronic leak checks, deep vacuum targets, micron gauge use, decay tests, and documenting final readings.
Nitrogen pressure test proceduresSoap bubble and electronic leak checksVacuum pump setup and hose selectionMicron gauge targets and decay testRecording final test resultsLesson 3Mounting systems: wall bracket selection, anchor types, and structural considerationsExplain how fi select and install mounting systems weh safely support indoor and outdoor units. Cover wall brackets, anchors fi different materials, load calculations, corrosion resistance, and vibration and noise considerations.
Choosing wall brackets and standsAnchor types for common materialsLoad rating and safety factorsCorrosion resistance and coatingsVibration and noise considerationsLesson 4Indoor unit siting: ideal height, clearance, airflow patterns, avoiding heat sources and sunlightExplain how fi choose di best indoor unit location fi comfort, efficiency, and service access. Cover mounting height, wall and side clearances, airflow paths, noise, and how fi avoid heat sources, sunlight, and obstructions.
Recommended mounting height rangesMinimum side and top clearancesAvoiding heat sources and sunlightAirflow patterns and throw distanceNoise, drafts, and occupant comfortLesson 5Outdoor unit placement: stable pad, clearance for airflow, noise considerations and vibration isolationExplain how fi select and prepare di outdoor unit location fi stable, quiet, and efficient operation. Cover pad selection, anchoring, service clearances, airflow paths, snow and debris concerns, and vibration and noise control.
Pad selection and level installationRequired service and airflow clearancesAvoiding recirculation and obstructionsNoise impact on neighbors and indoorsVibration isolation pads and mountsLesson 6Drain line routing and trap design to prevent siphoning and odorsExplain how fi design and route condensate drains fi prevent leaks, siphoning, and odors. Cover gravity versus pump drains, trap sizing, venting, slope requirements, cleanouts, and terminations weh meet code and hygiene needs.
Gravity drain versus pump selectionRequired slope and support spacingTrap sizing and placement rulesVenting to prevent siphoningCleanouts and drain terminationLesson 7Connection techniques: flaring vs brazing copper, use of access valves, flare torque specs and leak-prevention practicesCover methods fi connecting copper lines widout leaks. Compare flaring and brazing, explain when each appropriate, detail flare preparation, torque specs, nitrogen purging during brazing, and leak-prevention best practices.
When to flare versus when to brazePreparing and deburring copper tubeFlare nut torque values and toolsNitrogen purging during brazingLeak-prevention inspection stepsLesson 8Startup checklist and commissioning: opening service valves, superheat/subcooling checks, system balancing and test runCover di full startup and commissioning process after installation. Include opening service valves, verifying airflow, checking superheat and subcooling, balancing indoor airflow, test running in cooling and heating, and documenting readings.
Pre-start visual and leak checksOpening service valves safelyMeasuring superheat and subcoolingBalancing indoor airflow and dampersTest run, data logging, and sign-offLesson 9On-site safety protocols: electrical lockout/tagout, ladder and fall safety, PPE for cutting/brazing, fire watch and hot work permitsDetail essential on-site safety rules before and during installation. Cover electrical lockout/tagout, ladder setup, fall protection, PPE fi cutting and brazing, fire watch duties, and hot work permit requirements on customer sites.
Lockout/tagout for AC circuitsLadder setup and fall protectionPPE for cutting and brazingFire watch roles and durationHot work permits and recordsLesson 10Refrigerant piping: piping length limits, elevation differences, proper slope for drain and refrigerant oil returnFocus on refrigerant piping layout fi performance and compressor life. Cover manufacturer length and lift limits, line sizing, proper oil return slope, avoiding traps and kinks, insulation, and supporting lines fi prevent vibration.
Maximum line length and lift limitsLine sizing per manufacturer chartsOil return slope and trap locationsInsulation of suction and liquid linesSupporting and securing line sets
