Swaging and copper tube joint

• The four basic categories of sign are as follows
• Flaring tool with yoke
• Tube cutter
• Pipe bending tool
• Swaging tools
• Pinching tools
• Pressure gauges
• Compound gauge
• Thermometer
• Leak defects
• Soap bubble method
• Halide torch method
• Electronic detector
• Gauge manifold
• Sling psycho meter
• Swaging on copper tubing
• How to use a brazing torch
• Acetylene torch
• Propane turbo torch
• Kerosene blow lamp
• Silver brazing
• Flux

Flaring, flare fitting and testing the joints

• Flaring necessity
• Types of flaring
• Single thickness flare
• Double thickness flare
• Flared tubing fittings
• Pressurizing the joint on tubing

Introduction of Room Air conditioner

• Air conditioning
• Automatic air conditioning
• Air conditioner
• Air conditioning unit
• Room air conditioner
• Mechanical parts
• Electrical devices / control
• Splitair conditioner unit
• Compressor
• Condenser
• Filter drier
• Capillary tube
• Evaporator
• Selector switch
• Thermostat
• Relay
• O.L.P
• SplitA/C condenser fan
• Window A/C
• Evaporator fan
• Capacitors
• Fan motor
• Window unit
• Refrigerant unit
• Refrigerant control
• Temperature control
• Working principle of window A/C
• Differentiate the window and split AC

Capacitors, Relays, over load protector and Thermostat

• Capacitors
• Start capacitors
• Run capacitors
• Starting Relay
• Current ( magnetic ) relay
• Solid state relay
• Compressor winding
• Thermostat and its function
• Cut- in and cut temperature
• Differential setting
• Range setting
• Hermetically sealed compressor
• Compressor motor

Check winding in hermetic compressor.

Air flow and its properties

• Air movement in an air conditioned area
• Measuring air flow
• Measurement location for a velocity reverse traverse
• Anemometer
• Velocimeter ( Swinging vane )
• Velocity pressure ( Pilot tube )

Electric wiring of window and split A/C

• PSC circuit in window A/C
• The working of split A/C
• PSC circuit in split A/C

Contamination in hermetically sealed system

• Introduction
• Contaminant
• What is contaminant?
• Causes of contaminants
• Effects of contaminants
• Control of contaminants

Dehydrator (Filter driers)

• Moisture in the system
• Effects of excessive moisture
• Moisture Remover

Use of high purity nitrogen for pressure testing and leak checking

• Why dry nitrogen should be used?

Evacuation of the Refrigeration System

• Evacuation
• Why evacuate
• How do we evacuate the system
• Boiling point of water at various pressures
• Need for vacuum pump
• What type of vacuum pump
• Construction of two stage Rotary vacuum Pumps Effects of Altitude
• Rotary Pumps ( Positive displacement pumps )
• Rotary vane pumps
• Gas ballast
• Without gas ballast
• With gas ballast
• Pressure Compound and Vacuum Gauges
• Refrigerant quantity
• Charging by liquid or vapour
• Vapour charging
• Liquid charging
• Charging Accurately
• Refrigerant charging
• Charging with a charging cylinder
• Charging by weight
• Charging by sight glass
• Charging refrigerant using front line method

Performance test of air conditioner

• System performance
• Setting high and low pressure
• Precaution to be taken

Defects in Split Air – Conditioner “Compressor does not start”

• Symptom: “Compressor does not start”

Defects in Split Air – Conditioner “Compressor trips frequently”

• Symptoms: “Compressor trips frequently”

Defects in Split type Air – Conditioner “Poor cooling – Gas Shortage”

• Symptom: “Poor cooling”

Apply for Certification

https://www.vskills.in/certification/Vskills-Certified-Air-conditioner-Mechanic