- Definition of HVAC & HVAC Applications.
- Vapour Compression Refrigeration Cycle (VCRS)
- Components: Compressor, Condenser, Evaporator, Expansion Valve
- Refrigerant types and safe handling
- Superheat & Subcooling
- Pressure-temperature relationship.
- Safety practices & PPE.
- Unitary (Split, Window, Cassette, Tower AC)
- Ductable and Packaged Units
- VRF/VRV Systems.
- Closed Control Units – CCU’S
- Chilled Water Systems
- AHU, FCU, Heat Pumps
- DX vs Chilled Water comparison.
- Basics of IAQ.
- Natural Vs Mechanical Ventilation.
- Fresh Air Handling Units – FAHU’S
- Toilet & Kitchen Exhaust Fans.
- Smoke & Staircase Ventilation Systems.
- Ventilation System Maintenance.
- Types of Drawings.
- HVAC drawing symbols and legends
- Typical HVAC Installation details.
- Chilled water Shop drawings.
Air cooled System.
District Cooling System.
ETS Room & Pump Room.
VRF Shop drawings.
DX Split & Package unit drawings.
Ventilation Schematic drawings.
Service coordination drawing.
Carpark Ventilation Drawings.
Tools & Instruments Used.
Installation materials for Ducting & Piping Works
Copper pipe Installation : Flaring, brazing, insulation.
U Traps & P Traps.
Indoor/outdoor unit positioning and fixing
Power & Thermostat Wiring connections
Drain pipe routing and testing
Vacuuming, leak testing, and gas charging.
Ductwork Installation.
Understanding Ducting network.
Important Civil Aspects affecting Installation & Performance.
- Pre-commissioning checklist.
- Leminar – Seminar Review
- System vacuum and holding test
- Gas charging – Pressure method
- Startup procedure and system balancing
- Monitoring temperature, pressure, voltage, current
- Final commissioning reports and documentation.
- Calibration certificates of Tools & Instruments.
- Supplier T & C Reports (Principal Manufacturer).
- Third party T & C Reports. (Air & Water Balancing)
- Instruments used by 3rd party team.
- Calibration certificates of Tools & Instruments.
- CHW System Flushing Process.
- Traverse Reading & Static Pressure Measurement.
Major & Minor/Preventive service of AC Units.
Indoor/outdoor Filter & Coil cleaning
Checking electrical parts (Capacitor, Contactors, Thermostat, Relays, PCB, Wiring)
Lubrication, filter replacement, and drain cleaning
Service report writing
General Repair complaints (Group discussion)
Line Freezing & Hot tapping.
Master- Slave concept of Unit Control.
- Understanding a Fan Coil Unit & Condensing Unit.
- Basic Faults ,Causes & Solutions.
- Cooling failure, gas leakage, high ampere issues
- Thermostat and sensor problems
- PCB and capacitor faults
- Fan motor, relay, contactor issues
- Diagnosing with multimeter, clamp meter, and gauges
- Capacity identification of Units.
- TR and CFM calculations
- Room-wise cooling load calculation (manual)
- Other Important Thumb Rules.
- Equipment selection basics
- Duct sizing overview
- Refrigerant Pipe Sizing
AMC scope, formats, and scheduling
AMC Site Survey & Cost Calculation.
Retrofit planning:
Energy-efficient upgrades
Refrigerant changes (R22 to R410A, etc.)
R32 Inverter Units Power Saving.
ROI and cost-benefit analysis.
- VRF system layout and logic
- Piping design Schematics and communication wiring
- Periodic service activities
- Troubleshooting: Indoor & Outdoor Error Codes.
- FAHU with VRF Outdoors.
- Chiller types: Air-cooled & Water-cooled
- Components: Evaporator, Condenser, Compressor, Expansion Valve.
- Understanding Equipment Valve Packages.
- Chiller & Pump operation sequence
- Daily/Monthly chiller service tasks:
- Cleaning strainers, descaling condensers
- Checking refrigerant level & pressure
- Chilled water pump and valve checks
- Electrical inspection: Relay, contactor, sensor faults.
- Service Report Filling.
- Trouble Shooting Guidelines.
- Chiller Maintenance & Overhauling
Key spares: Compressor, PCB, motors, sensors, etc.
Critical vs Fast-moving inventory
Forecasting spares for AMC clients
Spare Parts MSL Analysis.
BOM from Principle, Exploded Parts View.
- Daily startup/shutdown procedures
- Operator log sheets: Pressure, temperature, current
- Energy efficiency tracking
- BMS for HVAC Equipment’s.
- Supplier O & M Manuals.
Ducted Split Units.
VRF Units.
Chilled water FCU & FAHU.
Pumps.
Ventilation Fans.
ESP.
Chemical Dosing Unit.
Dehumidifier
- Foreman & Supervisor
- Split, VRF & Chiller Technician.
- Facilities Management Roles.
- BMS Technician.
- AMC & Service Coordinator.
- Spare Parts Controller.
- Duct Artisan.
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