Many homes and offices uses the air-conditioner to cool he temperature in their respective homes. So the maintenance of the air-conditioner should be a top priority of every individual in order to avoid huge expenditure in the repairs of the system. It’s for this reason that this report is written for the benefit of those whom are privileged to own an air-conditioner in their respective homes.

This report is based on ordinary and advanced level research, in order to aid easy reading and understanding for an average person. This report begins with an introduction into the relevance of an air – conditioner, the history, description of the important components of the air – conditioner, the general maintenance and regular maintenance an serving, one is expected to carryout for effective performance of the air-conditioner and the faults discovered together with the repairs carried out.

Subsequently, advanced information pertaining to the repairs and calculations involving a faulty air conditioner have been giving certain sections of this report, which will be beneficial to those interested in the repairs of the faulty air conditioner.

Title Page

Letter of Transmittal

Approval Page

Dedication

Acknowledgement

Abstract

Table of Contents

CHAPTER ONE

1.1 Introduction

1.2 Literature Review

1.3 Definition Of An Air Conditioner

1.4 Why We Use Air Conditioner

1.5 Significance Of Study

1.6 Limitation Of Study

1.7 Basic Components Of Air Conditioner

1.8 Functions Of The Components

1.9 Air Conditioning System And Properties Of Air

CHAPTER TWO

2.1 Statement Of Problem/Faults

2.2 How To Detect The Faults

2.3 Brief Explanation Of Major Tools And Equipment’s Used

2.4 Detecting Of Faults

2.5 Correction Of Faults

2.6 Connection Of The Electrical Components

2.7 Detection Of Shortage Of Gas In The System

2.8 Replacement Of Front Grille And Filter

CHAPTER THREE

3.1 Maintenance Of Breakdown Air Conditioner

3.2 Causes Of Air Conditioner Breakdown

3.3 What Is Breakdown Maintenance

3.4 Categories Of Maintenance

3.5 Groups Of Air Conditioner Maintenance

3.6 General Maintenance And Repairs Schedules

3.7 Safety Precautions

CHAPTER FOUR

4.1 Principle Of An Air Conditioner

4.2 Mathematical Representations And Thermal Efficiency

4.3 Mathematical Analysis And Calculations

CHAPTER FIVE

5.1 Cost Analysis

CHAPTER SIX

6.1 Performance

6.2 Conclusion

6.3 References

CHAPTER ONE

1.1 INTRODUCTION

Over the years, all the tropical countries have been faced with the problem of air around them. The relative humidity of air in most of the tropics is very low; Hence the comfort is not there with the populace especially in the places of work. This consequently reduces the work rate of workers thereby affecting the GROSS NATIONAL PRODUCT of a country.

To this effect, the engineers and scientists are looking into the methods of bringing comfort to the people while at home and at work. They produced an appliance to help produce a cooler temperature for individuals known as AIR CONDITIONER. This appliance has been in operation for a very long time but most users prefer dumping their old ones for new Air conditioner due to lack of knowledge on how to maintain, repair or even rehabilitate minor faults in an air conditioner.

1.2 LITERATURE REVIEW

The origin of an air conditioner is necessary to trace. Its original conception, and the people that were involved in its production at its initial state.

An air conditioner was gradually developed and produced for cooling, cleaning heating and facilitating ventilating processes such as:

The end of the 15^th century, Leonardo da rinci had built the first ventilating fan.

In the year 1959, Boyle and also in the year 1800, Dalton discovered both discovered laws for ideal gases.

In 1815 Robertson Buchanan published the first book on heating and ventilation.

In the middle of the 19^th century fans, boilers and radiators had been invented.

In 1834, Alexander Twinning started commercial production of water ice, using the compression pump and sulphuric either as refrigerant.

Second half of 19^th century, brought about the further development of ice making and air conditioning processes.

In the 20^th century, Willis H. Carrier who is known as the “Father of Air Conditioning” designed and installed the first year round air conditioning system. It was performing the four major functions of heating, cooling, humidifying and dehumidifying of the air or rather using the air washer.

Willis H. Carrier (1976 – 1950) developed the applications of a forced draft fans, pipe coil heaters, centrifugal compressors, invented a psychometric chart and generally laid down the theory of air conditioning on a complete thermodynamic basis. On the most famous paper “Regional psychometric formulae” published in the year 1911, Willis Carrier related the dry bulb, we bulb; dew point temperatures of air with its sensible, latent and total heat and presented a theory adiabatic chart.

Air conditioning was increasingly been in use after Willis carrier’s invention; in cotton, rayon, silk, paper, tobacco, cady pharmaceutical and printing industries all around the world.

The first comfort for the people the air-conditioning was first installed in cinema building in 1920 in Chicago, employing dry ice machine and in 1922 in Los – Angeles using ammonia compressors.

This brought about an increase in demand and expansion in air conditioning equipments sales to cinema, office building, hostels, hospitals, airport terminal, departmental stores, banks, shops, and individual homes etc in the market, the buyers were assumed of better packages than the earlier ones.

1.3 WHAT IS AN AIR CONDITIONER

The provision of it can be defined as the process of treating air in order to clean or purify it, to control its temperature and humidity by heating or cooling and by humidifying and dehumidifying and to supply sufficient outdoor air for ventilation. The word air conditioning is employed to any process or system which fulfil all these requirements.

1.4 WHY WE USE AIR CONDITIONER

1. According to science, oxygen is needed for human life and for any living thing to stay alive, is one of the vital use of an air conditioner.

2. Air acts as a dilatants; ie the amount of air required depends on the permissible contaminant level for the room. The contaminant may be C0₂ human skin or omission from any other processes.