Lesson 1Refrigerant piping setup: materials, paths, insulation, brazing/welding best ways and pressure test pointsCovers refrigerant piping design and setup, including material choice, paths, supports, insulation, brazing or welding, and pressure testing, to reduce pressure loss, stop leaks, and safeguard oil return and system dependability.
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 plans, and BAS linking pointsCovers choice, placement, and wiring of controls and sensors, including thermostats, case controllers, defrost plans, and BAS linking, for precise temperature control, energy saving, and reliable system watching.
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 management: traps, slopes, backup drains, and clean tie-insFocuses on drainage and water management, including trap design, line sizing, slopes, backup drains, and clean tie-ins, to avoid water harm, germ growth, smells, and needless 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 prep: spaces, structural supports, water routing, and maintenance accessDescribes site prep for HVAC/R setups, including spaces, structural supports, wall openings, water routing, and maintenance 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, condensing units, and rack equipment placement, vibration damping, and sight-line factorsExplains best ways to place outdoor units, condensers, and racks, handling air flow, noise, vibration damping, structural support, and service access, while following spaces, rules, 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 6Indoor unit and evaporator setup steps for comfort HVAC and display casesGives step-by-step ways to install indoor units and evaporators in comfort HVAC and display cases, including mounting, air flow, piping ends, traps, and service access for efficient, quiet, and easy-to-maintain running.
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 links: service sizing, switches, circuit guards, earthing, and control powerDetails proper electrical service sizing, switch placement, circuit guards, earthing, and control power wiring for HVAC/R systems, stressing rule following, safe connections, labelling, and checks before powering up.
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 devices, and safety gear: manifold gauges, micron vacuum pump, leak finders, thermometers/hygrometers, clamp meters, brazing tools, refrigerant scales, recovery units, safety equipmentCovers choice, setup, and safe use of main HVAC/R tools, test devices, and safety gear, including calibration, upkeep, and field methods for accurate readings, smooth installation, and worker safety on every task.
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: refrigerant handling rules, electrical lockout/tagout, tight-space factors, and chemical exposure managementExplains vital safety ways for refrigerant handling, electrical tasks, tight spaces, and chemical exposure, stressing rule following, risk checks, and steps that prevent harm, property loss, and environmental damage.
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
