Lesson 1Electrical requirements: dedicated circuit, wire sizing, disconnect, grounding, surge protectionOutlines electrical needs for safe split AC installs meeting codes. Covers dedicated circuits, breaker sizes, wire gauges, disconnects, earthing, surge guards, and labelling for easy 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 methodsDetails steps for evacuation and testing to get a dry, leak-free system. Covers nitrogen tests, soap/electronic leak checks, deep vacuum goals, micron gauges, decay tests, and recording results.
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 considerationsShows how to pick and fit mounting for indoor/outdoor units safely. Covers brackets, anchors for local walls, load calcs, rust-proofing, and vibration/noise control.
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 sunlightGuides best indoor unit spots for comfort, efficiency, service. Covers height, clearances, airflow, noise, avoiding cookers, sun, blockages.
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 isolationShows how to site outdoor units for steady, quiet, efficient running. Covers pads, anchoring, service space, airflow, rain/debris, vibration dampers.
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 condensate drain design to stop leaks, sucking back, smells. Covers gravity/pump drains, trap sizes, venting, slope, cleanouts, ends meeting codes.
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 leak-free copper joins. Compares flaring/brazing, when to use each, flare prep, torque, nitrogen purge in brazing, leak-proof tips.
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 after install. Opening valves, airflow check, superheat/subcool, balancing air, test cool/heat modes, record data.
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 permitsKey site safety before/during install. Lockout/tagout power, ladder/fall gear, PPE for cutting/brazing, fire watch, hot work permits at client 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 returnFocuses on piping layout for performance, compressor life. Maker limits on length/lift, sizing, oil return slope, no traps/kinks, insulation, supports.
Maximum line length and lift limitsLine sizing per manufacturer chartsOil return slope and trap locationsInsulation of suction and liquid linesSupporting and securing line sets
