Lesson 1Pre-install checks: verifying unit model, matched components, refrigerant charge requirements, and tool listThis lesson covers verifying indoor/outdoor unit compatibility, nameplate data, refrigerant type/charge, site conditions, and tools before starting, to avoid rework, damage, and unsafe installs in Zambian sites.
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 paperworkThis lesson teaches documenting measured values, settings, test results, completing warranty forms, and customer handover, explaining controls, maintenance, and limitations clearly for Zambian clients.
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 lesson explains opening service valves, verifying refrigerant charge, measuring pressures/temperatures, and correcting for altitude/line length to maintain inverter performance within limits in Zambian elevations.
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 stressThis lesson covers insulating refrigerant lines, routing/securing lineset and cable, clamping to reduce stress, and protecting against UV, abrasion, vibration for efficiency and low noise in Zambia.
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 readingsThis lesson teaches connecting manifolds/hoses, pulling deep vacuum, standing tests, interpreting microns, and identifying leaks/moisture before charging the inverter system in humid Zambian conditions.
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 lesson covers initial startup, verifying amp draw, pressures, temperature split, superheat/subcooling, and checking noise/vibration for stable, efficient inverter operation in Zambian homes.
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 pumpThis lesson teaches designing/installing condensate drains with slope, traps, insulation, routing to discharge/pump, preventing leaks, odors, damage during cooling in Zambian humid environments.
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 lesson details preparing indoor mounting plate, marking, drilling holes, installing anchors, checking level/plumb for correct drainage, sealing, vibration resistance in Zambian buildings.
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 nitrogenThis lesson teaches copper tube cutting, reaming, flaring, torqueing, brazing with nitrogen purge/flux for clean, leak-free joints in inverter refrigerant circuits suitable for Zambia.
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 lesson explains safe panel connection, breaker sizing, grounding, polarity, low-voltage wiring for inverters, ensuring Zambian code compliance and reliable electronics.
Confirm supply voltage and breaker sizingRoute and secure power cable to unitsEarth bonding and continuity checksIndoor-outdoor terminal block wiringVerify polarity and phase rotation
