Lesson 1Installing refrigerant pipes: materials, paths, insulation, brazing/welding best ways and pressure testing pointsCovers design and installation of refrigerant pipes, including choosing materials, paths, supports, insulation, brazing or welding, and pressure testing, to reduce pressure loss, stop leaks, and protect oil return and system reliability.
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, fridge controllers, defrost control ways, and BAS joining pointsCovers choosing, placing, and wiring controls and sensors, including thermostats, fridge controllers, defrost ways, and BAS joining, to get accurate temperature control, energy saving, and reliable system checking.
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 water collection management: traps, slope, extra drains, and clean connectionsFocuses on drainage and water collection management, including trap design, line size, slope, extra drains, and clean connections, to stop water damage, germ growth, smells, and unneeded service calls in HVAC/R systems.
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: spaces, strong supports, water path routing, and access for upkeepDescribes site prep for HVAC/R installations, including spaces, strong supports, holes, water path routing, and upkeep access, ensuring safe, lasting, and serviceable systems that meet project needs.
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, condenser units, and rack equipment placing, vibration separation, and sight line considerationsExplains best ways to place outdoor units, condensers, and racks, addressing air flow, noise, vibration separation, strong support, and service access, while following spaces, codes, and sight line needs.
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 6Steps for installing indoor units and evaporators for comfort HVAC and display fridgesGives step-by-step ways to install indoor units and evaporators in comfort HVAC and display fridges, including mounting, air flow, pipe ends, traps, and service access to ensure efficient, quiet, and easy to maintain operation.
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, switches, circuit protection, earthing, and control powerDetails right electrical service sizing, switch placing, circuit protection, earthing, and control power wiring for HVAC/R systems, focusing on code following, safe ends, labelling, and checking before powering equipment.
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 tools, and safety gear: manifold gauges, micron vacuum pump, leak finders, thermometers/hygrometers, clamp meters, brazing tools, coolant scales, recovery machines, safety equipmentCovers choosing, setting up, and safe use of main HVAC/R tools, test tools, and safety gear, including checking, upkeep, and field ways that ensure accurate measures, efficient installation, and worker protection on every job.
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 steps: rules for handling coolant, electrical lockout/tagout, tight space considerations, and chemical exposure controlExplains key safety ways for handling coolant, electrical work, tight spaces, and chemical exposure, stressing rule following, risk checking, and steps that prevent injury, property damage, and environment harm.
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
