heating and air conditioning...title heating and air conditioning author mario created date 4/1/2020...
TRANSCRIPT
![Page 1: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/1.jpg)
Copyright © 2014 Delmar, Cengage Learning
Heating and Air Conditioning
Chapter 26
![Page 2: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/2.jpg)
Copyright © 2014 Delmar, Cengage Learning
Cooling System Components
• Water pump–Used to circulate
coolant through the engine and cooling system
–Usually driven by the timing belt or accessory drive belts
![Page 3: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/3.jpg)
Copyright © 2014 Delmar, Cengage Learning
Cooling System Components
• Radiator
– Transfers the heat retained in the coolant to the outside air
![Page 4: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/4.jpg)
Copyright © 2014 Delmar, Cengage Learning
Cooling System Components
• Radiator fan
–May be belt driven, electric, or hydraulic
–Used to pull air through the radiator when vehicle speeds are low
![Page 5: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/5.jpg)
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Cooling System Components
• Thermostat
–Usually located in the intake manifold
–Prevents coolant flow from the engine to the radiator until the coolant temperature reaches a certain point
![Page 6: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/6.jpg)
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Example of a Cooling System
![Page 7: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/7.jpg)
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Thermostats
Click on image above to play video
![Page 8: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/8.jpg)
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Fan Clutch
![Page 9: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/9.jpg)
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Electric Fan
![Page 10: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/10.jpg)
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Mode Controls and Air Flow
![Page 11: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/11.jpg)
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Blower Circuit
![Page 12: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/12.jpg)
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Refrigerant System Components
• Refrigerant
–All vehicles since 1995 have been equipped with R-134a
–Manufacturers are expected to introduce new refrigerant in future years
![Page 13: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/13.jpg)
Copyright © 2014 Delmar, Cengage Learning
Refrigerant System Components
• Compressor
– Separates the low and high pressure sides of the system
![Page 14: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/14.jpg)
Copyright © 2014 Delmar, Cengage Learning
Refrigerant System Components
• Accumulator is placed on the low side of the system after the evaporator and before the compressor
– Used to trap liquid refrigerant before it can enter the compressor
![Page 15: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/15.jpg)
Copyright © 2014 Delmar, Cengage Learning
Refrigerant System Components
• Receiver dryer is placed in the high pressure side of the system between the condenser and the expansion valve
– Used to store refrigerant until it is needed by the system
![Page 16: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/16.jpg)
Copyright © 2014 Delmar, Cengage Learning
Refrigerant System Components
• Evaporator
– Transfers the heat in the passenger compartment to the refrigerant
![Page 17: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/17.jpg)
Copyright © 2014 Delmar, Cengage Learning
Refrigerant System Components
• Condenser
– Transfers heat from the refrigerant to the outside air
![Page 18: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/18.jpg)
Copyright © 2014 Delmar, Cengage Learning
Refrigerant System Components
• Orifice tube/expansion valve
– Restriction designed to drop refrigerant pressure before it enters the evaporator
![Page 19: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/19.jpg)
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Refrigerant System Schematic
![Page 20: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/20.jpg)
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Heat Exchange
![Page 21: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/21.jpg)
Copyright © 2014 Delmar, Cengage Learning
Air Conditioning Safety
• Always wear safety glasses or goggles
• Never open a hot cooling system
• Keep loose clothing and jewelry away from moving components
![Page 22: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/22.jpg)
Copyright © 2014 Delmar, Cengage Learning
Air Conditioning Safety
• Never open the A/C system unless the refrigerant has been reclaimed from the system
• Do not attempt to open, disconnect, or service any high-voltage component or wiring
![Page 23: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/23.jpg)
Copyright © 2014 Delmar, Cengage Learning
Coolant Label
![Page 24: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/24.jpg)
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Coolant System Testing
Click on image above to play video
![Page 25: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/25.jpg)
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Cooling System Pressure Test
• With the engine cool, remove the radiator cap
• Attach the proper adapter to the filler neck
![Page 26: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/26.jpg)
Copyright © 2014 Delmar, Cengage Learning
Cooling System Pressure Test
• Apply pressure to the cooling system
–DO NOT exceed the pressure shown on the cap
![Page 27: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/27.jpg)
Copyright © 2014 Delmar, Cengage Learning
Cooling System Pressure Test
• Watch the pressure on the gauge
–If the pressure remains steady, there is not a large leak
• With pressure on the system, check the system for leaks
![Page 28: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/28.jpg)
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Cap Test
![Page 29: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/29.jpg)
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Refractometer Test
![Page 30: Heating and Air Conditioning...Title Heating and Air Conditioning Author Mario Created Date 4/1/2020 8:52:41 AM](https://reader034.vdocument.in/reader034/viewer/2022050114/5f4b3192026df5049510071d/html5/thumbnails/30.jpg)
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Cabin Filter Replacement