Split Air Conditioner (Floor, Ceiling / Cassette Mounted Split A.C)
The book “Split A.C (Floor, Ceiling / Cassette Mounted Split A.C)” is an important part of the ITI Refrigeration and Air Conditioning (RAC) trade curriculum. It provides detailed knowledge about advanced types of split air conditioning systems used in large spaces such as halls, offices, and commercial buildings. These systems are designed to provide efficient cooling with better air distribution and aesthetic installation.
Introduction
Floor-mounted, ceiling-mounted, and cassette-type split air conditioners are variations of split AC systems designed for specific applications. Unlike wall-mounted units, these systems are used in larger spaces where uniform cooling and high air circulation are required.
These systems consist of indoor and outdoor units connected by refrigerant piping, similar to standard split AC systems.
Main Components
The basic components of these systems are similar to other split air conditioners:
- Indoor Unit: Contains evaporator coil, blower, air filters, and controls
- Outdoor Unit: Contains compressor, condenser coil, and fan
- Refrigerant Piping: Connects indoor and outdoor units
- Expansion Device: Controls refrigerant flow
Types of Split AC Systems
Floor Mounted Split AC
Floor-mounted air conditioners are installed near the floor or at low wall levels. They are suitable for areas where wall installation is not feasible.
- Provides strong airflow at lower levels
- Easy installation and maintenance
- Suitable for halls and large rooms
Ceiling Mounted Split AC
Ceiling-mounted units are installed on or near the ceiling and are designed to distribute air over a wide area.
- Uniform air distribution
- Suitable for commercial spaces
- High cooling capacity
Cassette Type Split AC
Cassette air conditioners are installed in false ceilings, with only the decorative panel visible. They provide four-way air distribution.
- Uniform cooling in all directions
- Space-saving design
- Suitable for offices, malls, and showrooms
Working Principle
These systems operate on the vapor compression refrigeration cycle:
- Evaporator absorbs heat from indoor air
- Compressor increases pressure and temperature of refrigerant
- Condenser releases heat to the outside
- Expansion device reduces pressure and temperature
This continuous cycle ensures effective cooling.
Construction Features
The construction of these systems varies depending on type:
- Floor Mounted: Compact indoor unit placed at low level
- Ceiling Mounted: Suspended or fixed near ceiling
- Cassette: Installed inside false ceiling with air outlets on all sides
The outdoor unit remains similar in all types.
Advantages
- Suitable for large spaces
- Uniform air distribution
- Improved aesthetics (especially cassette type)
- High cooling efficiency
Limitations
- Higher installation cost
- Requires skilled installation
- Maintenance can be complex
Installation Considerations
- Proper location selection for indoor unit
- Strong support for ceiling-mounted units
- Proper piping and insulation
- Efficient drainage system
Maintenance
Regular maintenance is necessary:
- Cleaning filters and coils
- Checking refrigerant levels
- Inspecting electrical components
- Ensuring proper airflow
Applications
These systems are widely used in:
- Shopping malls
- Offices and conference rooms
- Hotels and restaurants
- Large residential halls
Conclusion
The book “Split A.C (Floor, Ceiling / Cassette Mounted Split A.C)” provides comprehensive knowledge about advanced split air conditioning systems. These systems are designed for efficient cooling in large spaces with better air distribution and aesthetics.
Understanding their construction, working, and applications helps RAC technicians perform installation and maintenance effectively. With increasing demand for large-scale cooling solutions, these systems play a vital role in modern air conditioning technology.