Lesson 1Inside unit mounting: place heights, refrigerant line chase entry, drip tray directionExplain correct inside unit placing for comfort, service access, and drainage. Detail line set routing, wall holes, and drip tray direction to stop leaks, noise, and future maintenance problems.
Select optimal wall and mounting heightPlan refrigerant line chase and routingDrill and seal wall penetrationsSet and level indoor mounting plateOrient and test condensate drip trayLesson 2Electrical connections, phase checks, and safety locks before powering onDetail safe electrical endings, wire sizing, and grounding. Include phase turn checks, control wiring, and check of safety locks before powering di split system.
Verify supply voltage and breaker sizeTerminate power and ground conductorsConnect control and communication wiringCheck phase rotation on three-phase unitsTest safety interlocks and fusesLesson 3Documenting settings and handing over basic operation notes to ownerFocus on documenting final settings, control parameters, and test results. You go prepare owner handover notes, basic operating instructions, and maintenance reminders for professional ending.
Record final control and timer settingsLog pressures, temperatures, and testsCreate basic user operation guideExplain filter cleaning and maintenanceObtain owner sign-off and warranty docsLesson 4Vacuuming and air removal: pump choice, target vacuum level, moisture removal waysGuide you through pump choice, hose setup, and reaching target vacuum. Stress deep air removal, moisture removal, micron gauge use, and decay tests to confirm system dry and tight.
Select appropriate vacuum pump sizeConnect hoses and core removal toolsPull vacuum to target micron levelPerform standing vacuum decay testRecognize signs of moisture or leaksLesson 5Leak finding and pressure testing: dry nitrogen pressure test, electronic leak finder useExplain how to pressurize with dry nitrogen, separate sections, and watch pressure decay. You go learn safe regulator use, soap solution ways, and electronic leak finder application.
Set up nitrogen cylinder and regulatorPressurize system to test pressure limitsCheck joints with soap solutionUse electronic leak detector correctlyRecord test pressure and durationLesson 6Wall bracket and mounting frame installation: leveling, anchor choice for brick or stud wallsDetail how to install wall brackets and frames for strong support. Focus on leveling, anchor choice for brick or stud walls, load paths, rust protection, and checking pull-out strength and stability.
Assess wall type and load capacityChoose anchors for masonry or studsMark, drill, and clean anchor holesLevel brackets and tighten fastenersVerify bracket alignment and rigidityLesson 7Start-up sequence and commissioning checks: superheat/subcooling measurement, steady temperature check, drainage test, noise and shake checksWalk through initial start-up, including mode choice, superheat and subcooling checks, and temperature steadiness. Also cover water drainage tests, noise, and shake evaluation.
Follow manufacturer start-up sequenceMeasure superheat and subcoolingVerify supply and return temperaturesTest condensate drainage performanceAssess operating noise and vibrationLesson 8Site prep and pre-installation checks: tools, permits, spaces, materials listCover site readiness before work start, including tool choice, permit check, and safe spaces. You go also build materials list to avoid delays and make sure code-following, efficient installation.
Verify site access and work area safetyConfirm permits, codes, and utility locationsCheck indoor and outdoor unit clearancesPrepare complete tools and materials listInspect structure for mounting suitabilityLesson 9Outside unit installation: base pad or brackets on outside wall, anti-shake pads, space and airflow space distancesDescribe outside unit placing on pads or wall brackets, with attention to spaces, airflow, shake control, and service access. Include snow, flooding, and noise thoughts for long-term strength.
Select base pad or wall bracket systemSet required service and airflow clearancesInstall and position anti-vibration padsLevel unit and secure to supportsPlan for drainage, snow, and floodingLesson 10Refrigerant line installation: cutting, deburring, bending, flare vs brazing workflow, torque and sealing waysCover cutting, deburring, and bending copper lines without kinking. Compare flaring and brazing workflows, torque values, and sealing ways to make sure leak-free, code-following refrigerant piping.
Measure, cut, and deburr copper tubingUse bending tools to avoid kinksPrepare and form accurate flaresApply torque to flare nuts correctlyInsulate and support line sets properlyLesson 11Opening service valves, refrigerant release way and handling captive refrigerant systemsExplain opening service valves and releasing factory charge without bringing contaminants. Cover captive refrigerant systems, valve stem handling, and documenting final operating pressures.
Identify service valves and capsBackseat and crack valves correctlyRelease captive refrigerant safelyCheck for leaks after opening valvesRecord operating pressures and temps
