Table of Content
Study of frost free refrigerator
- Define conventional refrigerator
- Define frost free refrigerator
- Features of the household refrigerator
Refrigerator system of frost free refrigerator
- Construction of the free refrigerator
- Compressor
- Parts of a conventional refrigerator
- Evaparator
Electrical components and their function in a frost free refrigerator
- Deforst Timer
- Defrost Heater
Study of wiring, Automatic defrost, heater, Timer fan motor and air duct system
- Electrical de-frost system
- Defrost Controls
- Damper control adjustment
Methodology of Retrofitting
- Retrofitting of CFC filled refrigerator with the HFC 134a refrigerator
- HFC’s advantage
- HFC’s disadvantage
- Precaution to be taken when retrofitting CFC filled refrigerator with HFC-134a
- Comparative study of components used for R-12 and R134a.
Details of CFC filled refrigerator with Hydro Carbon blend
- Retrofit CFC filled refrigerator with the HC refrigerant
- Refrigerator electrical devices using HC Refrigerants
- Properties of HC refrigerant
- Precaution to be taken when retrofit CFC filled refrigerator with HC blend refrigerants
- Care of handling with hydro carbon cylinders
Refrigerators using different refrigerants
- The service, components and replacement in HC refrigerator
- Comparative study on performance of refrigerator
Introduction of Air-conditioning
- Past Air-conditioning equipments
- Present Air-conditioning equipments
- Future Air-conditioning equipments
Air-conditioning Fundamentals
- Air conditioner
Constructional details of window Air-conditioner
- Main components of window A/C
- Front grill
- Outer cover
Air -conditioning system
- Air movement in air conditioned area
Electrical components of window air-conditioner
- Selector switch
- Thermostat
- Relay
- O.L. P.
- Capacitors
Split Air-conditioning
- Types of split air-conditioner
- Condenser
- Expansion devices
- Liquid line drier filter
- Evaporator
- Liquid suction heat exchanger
- Suction line accumulator
- Fan, Fan motor, blower
- Refrigerant tubing
- Ventilation of room
- Drainage of condensate water
- Functions
Comparison, advantage and disadvantage of split a/c and windows a/c
- Importance points of spilt a/c
- Specification of spilt a/c
- Windows ac unit consist of following components
- Windows ac system
Air cooled condensers
- Use of condenser
- Fin type air cooled condenser
Constructional details and specification of air condenser
- Detail of air cooled condenser
- Selection of air condenser
- Fin is part of tubing
- Coiled wire uses as fin
- Circular fin
- Large multiple fin
Air Filters Their Types and Specification
- How to clean The Air Filters
- Types of Air Filters And Their Specifications
- Prefilters Fine Filters
- Filters And Maintenance of Filters
- Electronic Air Cleaners
Air Flow Measurements
- Room Air Flows
- Room Units Air Flows
Velocity Meters
- Explain Air Flow Measurements
- Velocity And CFM
- Anemometer
- Rotating Vane Anemometer
- Deflecting Vane Anemometer
- Hot wire Anemometer
- Air Velocity at Various temperature
Principles of Pipe Sizing
- Piping Materials
- Pipe Joints
- General Design Consideration
- Sunction Line Size, Discharge Line Size For Air –Conditioners
Study of Service Valves
- Understand The Service Valve Operation
- Use of Service Valve For Gas Charging
Defective Window Model Room Air –Conditioner – “Compressor Does not Start’’
Defects in Window Model Air – Conditioner – “Compressor Trips Frequently"
Defects In Window Air –Conditioner - “poor Cooling” – “Evaporator Coil
Defects in Window Air –Conditioner “Poor Cooling”- Unit Running Continuosly
Defects in Split Type –Conditioner “Water Leakge In Indoor Unit”
MS-Windows
- Windows Basics
- The User Interface
- Windows Accessories
- Windows 7
- Windows 10
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