Lesson 1Electrical requirements: dedicated circuit, wire sizing, disconnect, grounding, surge protectionDescribes electrical needs for safe, rule-following split AC installations. Covers special circuits, breaker sizing, wire sizing, disconnect place, grounding, connecting, surge protection, and labeling for service in local power setups.
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 methodsDetails cleaning out air and pressure testing steps to ensure dry, tight system. Covers nitrogen pressure tests, soap and electronic leak checks, deep vacuum goals, micron gauge use, decay tests, and noting final readings for reliability.
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 considerationsExplains how to pick and install mounting systems that safely hold indoor and outdoor units. Covers wall brackets, anchors for different materials, load calculations, rust resistance, and vibration and noise in sturdy local buildings.
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 sunlightExplains how to choose best indoor unit spot for comfort, efficiency, and service access. Covers mounting height, wall and side spaces, air flow paths, noise, and avoiding heat sources, sun, and blocks in typical rooms.
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 isolationExplains how to pick and prepare outdoor unit spot for stable, quiet, efficient work. Covers pad choice, anchoring, service spaces, air flow paths, rain and dirt worries, and vibration and noise control in compounds.
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 odorsExplains how to design and route water drains to stop leaks, sucking back, and smells. Covers gravity versus pump drains, trap sizing, airing, slope needs, cleanouts, and ends that meet rules and clean standards.
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 practicesCovers ways to connect copper lines without leaks. Compares flaring and brazing, explains when each fits, details flare prep, torque specs, nitrogen cleaning during brazing, and leak-stop best ways for durable joints.
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 runCovers full startup and commissioning after install. Includes opening service valves, checking air flow, superheat and subcooling, balancing indoor air, test running in cooling and heating, and noting readings for smooth operation.
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 permitsDetails key on-site safety rules before and during install. Covers electrical lockout/tagout, ladder setup, fall protection, PPE for cutting and brazing, fire watch duties, and hot work permit needs on customer places.
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 returnFocuses on refrigerant piping layout for performance and compressor life. Covers maker length and height limits, line sizing, right oil return slope, avoiding traps and bends, insulation, and supporting lines to stop 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
