Lesson 1Indoor unit mounting: placement heights, refrigerant line chase entry, drip tray orientationExplains right inside unit placing for comfort, service reach, and draining. Details line set paths, wall holes, and drip tray setup to stop leaks, noise, and later fix troubles in local rooms.
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 interlocks prior to energizingDetails safe power endings, wire sizing, and grounding. Includes phase turn checks, control wiring, and safety lock checks before powering up the split system for secure starts.
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 ownerFocuses on noting final setups, control settings, and test outcomes. You will make owner handover notes, basic run guides, and fix reminders for pro wrap-up in Gambian handovers.
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 evacuation: pump selection, target vacuum level, moisture removal proceduresGuides pump pick, hose setup, and hitting target vacuum. Stresses deep air out, wet removal, micron gauge use, and hold tests to confirm system dry and tight for clean installs.
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 detection and pressure testing: dry nitrogen pressure test, electronic leak detector useExplains pressuring with dry nitrogen, splitting sections, and watching pressure drop. You will learn safe regulator use, soap mix tricks, and electronic leak finder ways for leak-free systems.
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 selection for masonry or stud wallsDetails fitting wall brackets and frames for firm hold. Focuses on leveling, anchor choice for stone or stud walls, load ways, rust guard, and checking pull strength and steady in local builds.
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, stable temperature verification, drainage test, noise and vibration checksWalks through first start, including mode pick, superheat and subcool checks, and temp steady. Also covers water drain tests, noise, and shake checks for smooth running.
Follow manufacturer start-up sequenceMeasure superheat and subcoolingVerify supply and return temperaturesTest condensate drainage performanceAssess operating noise and vibrationLesson 8Site preparation and pre-installation checks: tools, permits, clearances, materials checklistCovers site ready before start, including tool pick, permit check, and safe spaces. You will build materials list to cut delays and ensure code-follow, efficient fitting in Gambia.
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 9Outdoor unit installation: base pad or brackets on exterior wall, anti-vibration pads, clearance and airflow clearance distancesDescribes outside unit place on pads or wall brackets, minding spaces, air flow, shake control, and service reach. Includes rain, flood, and noise thinks for long steady in Gambian weather.
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 practicesCovers cutting, smoothing ends, and bending copper lines without kinks. Compares flaring and brazing steps, torque values, and seal practices for leak-free, code-follow 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 procedure and handling captive refrigerant systemsExplains opening service valves and letting out factory charge without dirty stuff. Covers held refrigerant systems, valve handle, and noting final run pressures for proper charge.
Identify service valves and capsBackseat and crack valves correctlyRelease captive refrigerant safelyCheck for leaks after opening valvesRecord operating pressures and temps
