Lesson 1Pre-install checks: verifying unit model, matched components, refrigerant charge requirements, and tool listThis part covers checking inside and outside unit match, plate data, coolant type and fill, site states, and needed tools and gear before starting, to avoid re-dos, harm, and 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 gauged values, setup choices, and test outcomes, fill warranty and rule forms, and hand over to client, explaining controls, upkeep, and main run limits plainly.
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 part explains right opening of service taps, checking total coolant fill, gauging run pressures and line temps, and tweaks for height and line length to keep inverter work in design bounds.
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 covering coolant lines, guiding and fixing the pipe set and control cable, clamping to cut mechanical strain, and guarding from sun, rub, and shake to keep efficiency and stop 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 linking manifolds and hoses, pulling deep empty, doing standing empty test, reading micron values, and spotting leaks or wet issues before letting coolant into the inverter setup.
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 part covers first start of the inverter setup, including checking amp pull, run pressures, temp split, superheat, subcool, and looking for odd noise or shake to confirm steady, efficient work.
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 designing and fitting water drains with right slope, trap needs, covering, and guiding to okay out or pump, stopping leaks, smells, and water harm in cooling and dry runs.
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 part details readying the inside fix plate, marking layout, drilling true holes, fitting anchors, and checking level and straight so the unit drains right, seals good, and fights shake 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 cut, smooth, flare, and torque, plus weld ways with gas purge and right flux use where needed, ensuring clean, no-leak joins for inverter coolant paths.
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 part explains safe link to supply board, breaker size, earthing, pole check, and low-power control wiring for inverter setups, ensuring rule match, maker needs, and steady electronic work.
Confirm supply voltage and breaker sizingRoute and secure power cable to unitsEarth bonding and continuity checksIndoor-outdoor terminal block wiringVerify polarity and phase rotation
