Lesson 1Pre-install checks: verifying unit model, matched components, refrigerant charge requirements, and tool listThis section covers checking indoor and outdoor unit match, label data, gas type and charge, site setup, and needed tools and gear before starting, to avoid redoing work, damage, or unsafe fits.
Confirm indoor and outdoor model compatibilityCheck nameplate voltage, phase, and frequencyVerify factory refrigerant type and base chargeAssess site conditions and mounting constraintsPrepare tools, PPE, and test instrumentsLesson 2Commissioning documentation: recording measurements, settings, and customer handover paperworkHere you will record measured values, setup choices, and test results, fill warranty and rule forms, and hand over to customer, explaining controls, upkeep, and main running limits clearly.
Record electrical and refrigeration readingsNote configuration and control settingsAttach photos or digital test reportsComplete warranty and compliance formsExplain operation and maintenance to userLesson 3Opening service valves, initial charge verification, measuring pressures and temperatures, and adjusting for altitude/line lengthThis section explains opening service valves right, checking total gas charge, measuring running pressures and pipe temps, and fixing for height and pipe length to keep inverter work within set limits.
Sequence for cracking service valvesCheck for leaks at valve stemsCompare nameplate and line length dataMeasure operating pressures and tempsAdjust charge per manufacturer tablesLesson 4Insulating lines, securing lineset and electrical cable, and clamping to minimize stressHere we cover insulating refrigerant lines, routing and fixing the pipe set and control cable, clamping to cut mechanical strain, and shielding from sun, rubbing, and shakes to keep efficiency and cut noise.
Select correct insulation thicknessInsulate suction and liquid lines fullyBundle lineset and control cable neatlyClamp and support to relieve strainProtect lines from UV and sharp edgesLesson 5Evacuation and leak test sequence: connecting gauges, vacuum pump operation, holding test, and interpreting micron readingsHere you will learn how to link manifolds and hoses, pull deep vacuum, do standing vacuum test, read micron levels, and spot leaks or moisture before putting gas into the inverter system.
Correct manifold and hose connectionsVacuum pump setup and oil conditionTarget vacuum level and pull-down timeStanding vacuum and rise test procedureInterpreting micron trends for leaksLesson 6Startup checks: amp draw, operating pressures, temperature split, refrigerant superheat/subcooling checks, listening for abnormal noise, and vibration assessmentThis section covers first start-up of the inverter system, checking current draw, running pressures, temp split, superheat, subcooling, and listening for odd noise or shakes to confirm steady, good running.
Pre-start visual and safety inspectionMonitor compressor and fan amp drawMeasure suction and discharge pressuresCheck supply-return temperature splitEvaluate noise, vibration, and airflowLesson 7Proper condensate drain installation: ensuring slope, trap formation (if required), and routing to approved discharge or pumpYou will learn how to plan and fit water drains with right slope, trap needs, insulation, and routing to approved outlet or pump, stopping leaks, smells, and water harm during cooling and drying.
Determine drain outlet location and sizeSet continuous slope and support spacingTrap design for negative pressure unitsInsulate drain in humid environmentsTest drain flow and leak tightnessLesson 8Preparing mounting plate, drilling accurate holes, inserting anchors, and checking level and plumbThis section details readying the indoor mounting plate, marking layout, drilling true holes, fitting anchors, and checking level and straight so the unit drains right, seals well, and fights shakes long-term.
Mark plate position and clearancesLocate studs or solid fixing pointsDrill wall and sleeve penetration holesInstall anchors suited to wall materialVerify plate level, plumb, and rigidityLesson 9Making copper connections: cutting, flaring procedure step-by-step, or brazing technique including flux and purge with nitrogenYou will learn right copper tube cutting, smoothing, flaring, and tightening, plus brazing with nitrogen flow and flux where needed, ensuring clean, no-leak joins for inverter gas circuits.
Select tubing size and cutting toolsDeburr and ream without contaminatingFlaring dimensions and tool setupTorque flare nuts to spec valuesNitrogen purge and brazing techniqueLesson 10Electrical hookup sequence: connecting to local panel, breaker installation, earth bonding, control wiring, and verifying polarityThis section explains safe link to power board, breaker sizing, earthing, polarity, and low-voltage control wiring for inverter systems, meeting codes, maker rules, and steady electronic running.
Confirm supply voltage and breaker sizingRoute and secure power cable to unitsEarth bonding and continuity checksIndoor-outdoor terminal block wiringVerify polarity and phase rotation
