Lesson 1Refrigerant Piping Installation: Materials, Routing, Insulation, Brazing/Welding Best Practices and Pressure Testing PointsCovers refrigerant piping design and installation, including material selection, routing, supports, insulation, brazing or welding, and pressure testing, to minimise pressure drop, prevent leaks, and protect oil return and system reliability in local installations.
Copper tube types, sizing, and fittingsOil return, risers, and line routing rulesPipe supports, hangers, and vibration loopsInsulation thickness, sealing, and UV protectionBrazing with nitrogen purge and joint cleaningPressure testing, standing tests, and recordsLesson 2Controls and Sensors: Thermostats, Case Controllers, Defrost Control Strategies, and BAS Integration PointsCovers selection, placement, and wiring of controls and sensors, including thermostats, case controllers, defrost strategies, and BAS integration, to achieve accurate temperature control, energy efficiency, and reliable system monitoring in Zimbabwean facilities.
Thermostat types, staging, and placementCase controller inputs, outputs, and tuningDefrost strategies for cases and coilsTemperature, pressure, and humidity sensorsControl wiring, shielding, and terminationsBAS integration points, alarms, and trendsLesson 3Drainage and Condensate Management: Traps, Slope, Secondary Drains, and Sanitary Tie-InsFocuses on drainage and condensate management, including trap design, line sizing, slope, secondary drains, and sanitary tie-ins, to prevent water damage, microbial growth, odours, and nuisance service calls in HVAC/R systems across Zimbabwe.
Primary drain pan design and materialsTrap sizing for positive and negative pressureCondensate line sizing, slope, and supportsSecondary drains, float switches, and alarmsSanitary tie-ins, vents, and code complianceCondensate treatment and freeze protectionLesson 4Site Preparation: Clearances, Structural Supports, Condensate Routing, and Access for MaintenanceDescribes site preparation for HVAC/R installations, including clearances, structural supports, penetrations, condensate routing, and maintenance access, ensuring safe, durable, and serviceable systems that meet project requirements in local contexts.
Surveying site constraints and obstructionsPlanning equipment clearances and pathwaysStructural supports, pads, and roof curbsWall, roof, and sleeve penetrations sealingCondensate routing and freeze protectionService access, lighting, and work platformsLesson 5Outdoor Units, Condensing Units, and Rack Equipment Placement, Vibration Isolation, and Line-of-Sight ConsiderationsExplains best practices for locating outdoor units, condensers, and racks, addressing airflow, noise, vibration isolation, structural support, and service access, while respecting clearances, codes, and line-of-sight requirements in Zimbabwean sites.
Clearances for airflow, service, and safetyRoof, pad, and wall mounting considerationsVibration isolators, inertia bases, and pipingNoise control and neighbor impact mitigationWeather, sun, snow, and debris protectionLine-of-sight, security, and equipment labelingLesson 6Indoor Unit and Evaporator Installation Steps for Comfort HVAC and Display CasesProvides step-by-step procedures for installing indoor units and evaporators in comfort HVAC and display cases, including mounting, airflow, piping stubs, traps, and service access to ensure efficient, quiet, and maintainable operation in retail setups.
Locating indoor units for airflow and serviceHanging, leveling, and supporting evaporator coilsConnecting refrigerant lines and suction trapsThermal expansion valve and distributor setupAirflow checks, filters, and coil clearancesStart-up inspection and documentation pointsLesson 7Electrical Connections: Service Sizing, Disconnects, Circuit Protection, Grounding, and Control PowerDetails proper electrical service sizing, disconnect placement, circuit protection, grounding, and control power wiring for HVAC/R systems, focusing on code compliance, safe terminations, labelling, and verification before energising equipment in Zimbabwe.
Reading nameplates and calculating load currentsSelecting wire size, insulation, and conduitOvercurrent protection and short-circuit ratingsEquipment grounding and bonding practicesControl transformers and low-voltage circuitsLabeling, torqueing, and testing terminationsLesson 8Tools, Test Instruments, and PPE: Manifold Gauges, Micron Vacuum Pump, Leak Detectors, Thermometer/Hygrometers, Clamp Meters, Brazing Tools, Refrigerant Scales, Recovery Machines, Safety GearCovers selection, setup, and safe use of core HVAC/R tools, test instruments, and PPE, including calibration, maintenance, and field techniques that ensure accurate measurements, efficient installation, and technician protection on every job in Zimbabwe.
Manifold gauge types and proper hose handlingUsing micron gauges and vacuum pumps correctlyElectronic and bubble leak detection methodsClamp meters and temperature measurement basicsBrazing tools, nitrogen purge, and safetyRefrigerant scales, recovery units, and PPE useLesson 9Key Safety Precautions: Refrigerant Handling Rules, Electrical Lockout/Tagout, Confined-Space Considerations, and Chemical Exposure ControlExplains critical safety practices for refrigerant handling, electrical work, confined spaces, and chemical exposure, emphasising regulatory compliance, risk assessment, and procedures that prevent injury, property damage, and environmental harm in local work.
Refrigerant handling, labeling, and cylinder storageAvoiding frostbite, asphyxiation, and eye injuriesLockout/tagout steps for HVAC/R equipmentConfined-space entry permits and ventilationChemical exposure limits and SDS interpretationSpill response, first aid, and incident reporting
