Lesson 1Pre-install checks: verifying unit model, matched components, refrigerant charge requirements, and tool listThis part covers checking indoor and outdoor unit match, nameplate info, coolant type and charge, site conditions, and needed tools before start, to stop re-do, harm, and unsafe setups in our local work.
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 go note measured values, setup settings, and test results, finish warranty and rule forms, and hand over to customer, explaining controls, care, and key limits clear for Liberian users.
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 opening service valves right, checking total coolant charge, measuring work pressures and line temps, and fixing for height and line length to keep inverter work within plan limits locally.
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 coolant lines, routing and holding the lineset and control cable, clamping to cut mechanical stress, and guarding against UV, rub, and shake to keep efficiency and stop noise in homes.
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 go learn how to link manifolds and hoses, pull deep vacuum, do standing vacuum test, read micron, and spot leaks or wet issues before putting coolant in the inverter system for safe local use.
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 system, including checking amp draw, work pressures, temp split, superheat, subcooling, and looking for odd noise or shake to confirm steady, good 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 go learn how to plan and set up water drains with right slope, trap needs, insulation, and path to approved out or pump, stopping leaks, smells, and water harm during cooling and dry air in Liberia.
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 indoor mounting plate, marking layout, drilling right holes, putting anchors, and checking level and straight so the unit drains good, seals fine, 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 go learn right copper tube cutting, smoothing, flaring, and tightening, plus brazing ways with nitrogen clean and right flux use where needed, ensuring clean, no-leak joints 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 panel, breaker size, grounding, polarity, and low-voltage control wiring for inverter systems, ensuring code follow, maker needs, and steady electronic work in Liberia.
Confirm supply voltage and breaker sizingRoute and secure power cable to unitsEarth bonding and continuity checksIndoor-outdoor terminal block wiringVerify polarity and phase rotation
