Lesson 1Two likely causes of floor-to-floor temperature differences: airflow imbalance (duct/vent, registers) and refrigerant or compressor performance issuesDis section explain the two big reasons for floor-to-floor heat difference: air flow wahala from duct or register, and problems with refrigerant or compressor wey reduce system power.
Identify symptoms of airflow imbalance by floorCheck for closed, blocked, or misdirected registersRecognize signs of low capacity or poor compressionRelate duct design limits to current building loadsDecide when imbalance needs design reviewLesson 2Confirming causes: airflow measurements, temperature splits, return air assessments, refrigerant charge checks (when qualified)Dis explain how to confirm true cause of comfort problem using air flow read, temp difference, return air check, and if you qualify, refrigerant level, so data support fix or call contractor.
Measure supply and return airflow at key zonesCheck temperature split across evaporator coilAssess return air paths, blockages, and bypassesInterpret static pressure and fan performance dataCoordinate refrigerant checks with licensed staffLesson 3Safe tasks for technician: filter change, register balancing, condensate clearing, visual rooftop checksDis define safe tasks for building tech like change filter, balance register and vent, clear water drain, and look rooftop while following safety and lockout.
Replace and label filters to building standardsAdjust supply registers and diffusers for balanceClear and test condensate pans, traps, and drainsPerform visual rooftop unit and curb inspectionsDocument findings and escalate issues appropriatelyLesson 4Initial rooftop unit checks: power, disconnect, visible refrigerant/oil leaks, condensate drainageDis cover first checks at rooftop unit when comfort complaint come, like check power and switch off, look for oil or refrigerant mark, and make sure water drain good.
Verify main power, fuses, and disconnect positionInspect panels, gasketing, and unit anchoringLook for oil stains and refrigerant leak indicatorsCheck condensate pans, traps, and drain outletsNote unusual noises, vibration, or fan behaviorLesson 5Preventive maintenance schedule and best practices (filter frequency, seasonal tune-ups, condensate drain care)Dis show preventive plan for rooftop and duct, include filter change time, season check-up, coil and drain care, and writing to cut breakdown and complaints.
Set filter change frequency by load and environmentPlan seasonal cooling and heating tune‑upsClean coils, drain pans, and traps routinelyInspect belts, bearings, and electrical terminationsMaintain detailed PM logs and service historyLesson 6Thermostat and control verification: setpoint checks, zoning conflicts, sensor placement and calibrationDis focus on check thermostat and control, like set points, schedules, zone fight, sensor place, and tune so control wahala no look like equipment or duct problem.
Confirm thermostat modes, setpoints, and schedulesCheck zoning dampers for proper responseEvaluate sensor placement and draft influencesPerform basic thermostat and sensor calibrationReview BAS trends for overrides and conflictsLesson 7Work requiring licensed HVAC contractor: refrigerant handling, compressor or coil replacement, major duct modifications, electrical motor replacementsDis clear say which tasks only licensed AC people fit do, stress law, refrigerant rules, big part change, and complex duct or wire work wey pass building tech limit.
Regulations for refrigerant recovery and chargingCompressor, condenser, and evaporator coil replacementMajor duct resizing, rerouting, or new trunk linesReplacement of condenser, blower, and VFD motorsPermits, inspections, and documentation needsLesson 8Post-repair validation: temperature mapping, airflow measurements, runtime and short-cycling checks, tenant comfort verificationDis explain how to check say fix work, using temp map, air flow check, run time watch, and tenant talk to confirm steady work without short run or new wahala.
Map temperatures by floor and representative zonesRecheck airflow and diffuser throw after changesMonitor runtimes and watch for short‑cyclingConfirm condensate drainage and coil conditionsGather tenant feedback and update service recordsLesson 9Basic routine checks: filter condition, blower operation, refrigerant pressures, compressor and fan motorsDis outline normal checks before deep look, focus filter, blower work, basic wire check, and watch refrigerant pressure without change unless you qualify.
Inspect and document filter type and conditionVerify blower rotation, speed, and noise levelsCheck blower belts, pulleys, and motor mountsObserve suction and discharge pressures, no adjustmentsRecord nameplate data and compare to readingsLesson 10System overview: packaged rooftop unit components and common control schemesDis introduce rooftop unit parts and control ways, explain how compressor, fan, coil, damper, economizer work with thermostat, safety, and building system for comfort.
Identify major mechanical components and layoutUnderstand economizer and outdoor air functionsReview common safety switches and lockoutsOverview of basic thermostat and BAS interfacesTrace typical cooling and heating control sequencesLesson 11Ductwork inspection steps: static pressure checks, visual inspection for leaks, balancing dampers and grille/register checksDis detail duct check methods, include static pressure, look for leak or damage, and check balance damper, grille, register so air go where e suppose.
Measure supply and return static pressuresInspect ducts for leaks, kinks, and insulation gapsLocate and set balancing dampers correctlyCheck grille and register sizing and orientationDocument deficiencies and recommend corrections
