Air conditioning and refrigeration repair made easy pdf
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- AIR CONDITIONING AND REFRIGERATION REPAIR MADE EASY
- Air Conditioning Maintenance Made Easy
- Modern Refrigeration and Air Conditioning, 21st Edition
AIR CONDITIONING AND REFRIGERATION REPAIR MADE EASY
Log In Sign Up. Download Free PDF. Rana Shaam. Download PDF. A short summary of this paper. No part of this book may be reproduced or transmited in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in wriing from the copyright owner. It provides all the technical knowledge needed to start a successful refrigeration and air-conditioning business anywhere in the world.
As opposed to the existing publications in this field, this unique book has been written neither at the third-grade level nor does it require a PhD to understand.
It is the essence of several years of experience containing the most up-to-date information and methods of troubleshooting and repairing commercial and residential refrigeration and air-conditioning units. By successfully studying this book and applying its techniques, even those already working in this field can substantially increase their hands on repairing knowledge and technique.
Considering the tremendous size of this market, this is, after all, a profession that puts its practitioners in great demand worldwide. Providing these services to the consumer in his home or business is the most rewarding. Frequently, a unit fails when the customer needs it the most. Therefore, a service call must be prompt and efficient.
This book is written in plain language coupled with hundreds of pictures and illustrations to make it easily understood. The step-by-step troubleshooting, repair techniques and charts in this book make the most complicated jobs very simple. Considerable effort has been made to keep the text clear and concise.
Study each page until it is clear before going on to the next. By studying carefully and paying attention to all the details, the technician will be able to provide his customers with high-quality service. Information gained and used from this course is probably the best gift anyone can give his or her loved ones; truly, a gift to last a lifetime. The average person can develop this into a very lucrative business during his first year of operation.
This book is dedicated to those who are serious about succeeding in this profession, but cannot afford the time or expense of a full-time formal training course. Always wear safety goggles or glasses when working on refrigeration or air-conditioning units where there is danger of flying particles from compressed gases.
Never breathe refrigerant fumes of any kind. Always wear a gas mask when working in a refrigerant-laden atmosphere or near brazing fumes.
Do not expose yourself to electrical shocks. Do not work on electrical circuits in moist or wet areas, and always keep open electrical terminals covered with an insulating material. Make sure there is an adequate and proper fire extinguisher available, especially when brazing or using a torch. Prevent severe shocks by discharging capacitors before touching them. Use a capacitor discharger by following the instructions in this book.
Never use any gas other than Refrigerant printed on the name plate for developing pressure in residential refrigeration systems. Avoid contact with liquid refrigerant.
It can severely burn your skin. When working outside, and plants or shrubs are downwind, do not allow the refrigerant to be released into the air as it kills grass and other small plant life.
Always unplug the unit before beginning any electrical or mechanical work. Always use a three-wire extension cord or power supply cord. This is the common grounded three-prong plug found on most new appliances.
It is dangerous to personnel and the equipment to disregard proper grounding techniques. When transferring liquid refrigerant from a storage cylinder to a service cylinder, never fill it completely full; the pressure buildup can cause the cylinder to explode. Always keep refrigerant containers and acetylene and oxygen cylinders away from any heat source or flame.
Compressor oil mixed with refrigerant in a system may become acidic. Avoid burns by using rubber gloves and safety glasses. Always remove the refrigerant from a system before brazing.
This can be done by installing a service valve in the system. When the valve is opened, the gas in the system can be recovered.
Never touch liquid refrigerant placed in an open vessel. It can create severe injuries when coming in contact with skin. Always use leg muscles instead of back muscles to lift heavy objects. Be cautious of sharp edges or corners when performing any service on refrigerating units. Get into the habit of keeping one hand in a pocket when troubleshooting any equipment with high-voltage circuitry.
Do not forget that even a small shock can be dangerous. A reflex reaction to it, could cause a fall against a higher voltage source.
Never drop refrigerant cylinders. When transporting two or more, be sure that they are blocked or tied so they cannot strike one another.
Never allow cylinders to be moved with a lifting magnet. Always replace the valve protector caps on cylinders after each use. Make sure that the test leads on all meters have the proper insulation. Never use those with frayed or missing pieces of insulation. Always be cautious when vapor refrigerant is released. Also, do not touch a valve with bare hands during or immediately after releasing the gas.
Never touch any uninsulated wire or terminal while the supply power is connected to the unit. Make sure the unit is properly grounded. In a properly grounded unit, should a short occur, the electrical charge will be carried harmlessly to ground instead of flowing through the person who may be touching it at that time.
Electricity flows through the path of least resistance. Since the human body has far more resistance than a grounded circuit, stray current flows directly to ground. NOTE: When transporting a refrigerator, avoid laying it down because the compressor oil leaves the compressor.
If it is restarted too soon, the compressor will operate without proper lubrication and be destroyed. If it must be laid down for any length of time over five minutes, it must be placed in its upright position for at least twelve hours before a start-up.
This gives the oil a chance to settle back into the compressor housing. Good service technicians need good hand tools. Buy top quality tools and keep them clean and neatly arranged in a good toolbox. The better ones are guaranteed forever against breakage or excessive wear. The best tools give pride in ownership, make the job easier, last longer, and consequently become the least expensive. So buy the best. It is important to use wrenches that fit the nut or bolt, screwdrivers that fit the slot in the screw head, etc.
The wrong-size wrench does not fit or it is slightly too large causes the edges of the nut or bolt to become rounded. The proper-size screwdriver allows the application of more torque with less effort. When turning a nut or bolt, draw the wrench toward you rather than pushing it away. While pushing, if the wrench slips, it may cause a hand injury. Wearing safety-toe shoes shoes with a hard steel cap in the toe is also a good idea. Some need a great deal of heat to reach their boiling point to vaporize while others require very little.
When speaking of boiling a liquid, we immediately think of heating water in a pan on a stove and watching it bubble. The fact is that the boiling points of some liquids are so low that they vaporize far below room temperature.
In an imaginary experiment, if RA liquid refrigerant were placed in a tea cup, it would immediately vaporize, leaving a thick, heavy layer of frost on the cup. This would happen because the relatively high temperatures in the room would cause the liquid refrigerant, with a boiling point of The refrigerant absorbs the heat required to boil from the closest object to it, the cup.
When the cup gives up its heat to the liquid RA, it becomes extremely cold, causing the moisture in the surrounding air to condense on the cup surface and form a thick layer of frost. Liquid refrigerant tends to vaporize as pressure imposed upon it is reduced. It is already known that water boils at a lower temperature at high altitudes where the atmospheric pressure is lower. This is what happens to the refrigerant as it is drawn into evaporator coil of a refrigeration unit and the reason the evaporator feels cold.
Vapor refrigerant tends to return to its liquid state condensate as pressure imposed upon it is increased. This is what happens as refrigerant is forced into the condenser of unit. Vaporizing refrigerant absorbs heat from its immediate surrounding environment. This is what happens in the evaporator.
When vapor refrigerant gives up a certain amount of heat, it changes back to its liquid state.
Air Conditioning Maintenance Made Easy
Air Conditioning and Refrigeration Repair written by Roger a Fischer is very useful for Mechanical Engineering MECH students and also who are all having an interest to develop their knowledge in the field of Design, Automobile, Production, Thermal Engineering as well as all the works related to Mechanical field. This Book provides an clear examples on each and every topics covered in the contents of the book to provide an every user those who are read to develop their knowledge. Air Conditioning and Refrigeration Repair written to meet exhaustively the requirements of various syllabus in the subject of the courses in B. Sc Engineering of various Indian Universities. You all must have this kind of questions in your mind. Below article will solve this puzzle of yours.
Air conditioning can be used in both domestic and commercial environments. This process is most commonly used to achieve a more comfortable interior environment, typically for humans and other animals; however, air conditioning is also used to cool and dehumidify rooms filled with heat-producing electronic devices, such as computer servers , power amplifiers , and to display and store some delicate products, such as artwork. The cooling is typically achieved through a refrigeration cycle , but sometimes a passive cooling system such as evaporation or free cooling is used. Air conditioning systems can also be made based on desiccants chemicals that remove moisture from the air. Some AC systems reject or store heat in subterranean pipes. Air conditioners often use a fan to distribute the conditioned air to an enclosed space such as a building or a car to improve thermal comfort and indoor air quality. Electric refrigerant-based AC units range from small units that can cool a small bedroom, which can be carried by a single adult, to massive units installed on the roof of office towers that can cool an entire building.
Modern Refrigeration and Air Conditioning, 21st Edition
The installation, operation, adjustment, and repair of refrigeration equipment are the primary responsibility of the Utilitiesman rating. To perform these duties required of a refrigeration mechanic, you need to understand the principles and theory of refrigeration and recognize system components and understand the way they work within the lkmuzey. Opening an Air conditioning Business can be a very good business opportunity if you have an idea and passion about it. You can earn maximum money in the Summer as its demand in a peak in this season.
You know how to connect gauges and read the pressures.
Air Conditioning And Refrigeration Repair Made Easy ebook
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