Chapter 1 Boilers

• Boiler Design Requirements
• Water Tube Boilers
• Scotch Marine Boiler
• Vertical-Tube Boiler
• Horizontal Return Tubular Boiler
• Firebox  Boiler
• Chimneys, Draft Fans, and Breechings
• Fusible Plugs
• Figure 1-7.—Typical water columns
• Table 1-1.—Operation of a Boiler Circuit
• Safety Valve
• Steam Injector Feed System
• Boiler Accessories
• Table 1-2.—Boiler Accessories, Its Location, and Function
• Table 1-2.—Boiler Accessories, Its Location, and Function—Continued
• Pressure Regulating Control
• Figure 1-16 Pressure Regulator
• Combustion Control
• Flame Failure and Operational Controls
• Steam Flowmeters
• Figure 1-23 Flowmeter
• Figure 1-24 Airflow Mechanism of a Boiler Air Flowmeter
• Water Impurities
• Scale
• Methods of Treatment
• Test for Hardness
• Figure 1-30 General Laboratory Equipment
• Test for Phosphate
• Test for Tannin
• Test for Caustic Alkalinity (OH) with Tannin
• Test for Sodium Sulfite
• Test for pH
• Test for Total Dissolved Solids
• Cleaning Boiler Firesides and Watersidex
• Cleaning Procedures
• Mechanical Cleaning
• Chemical   Cleaning
• Safety Precautions
• Acid Cleaning Procedures
• Figure 1-36.—Acid cleaning by fill-and-soak method
• Summary

Chapter 2 Boiler Maintenance

• Figure 2-2.—Typical water column for low-pressure boiler.
• Gauge Glass Replacement
• Steam Injector Maintenance
• Handhole and Manhole Gasket Maintenance
• Hydrostatic Tests
• Composition of Boiler Tubes
• Renewing Tubes
• Cleaning Tubes
• Preparing Tube Sheets
• Figure 2-11.—Expanding a tube.
• Belling Tubes
• Figure 2-14.—Removing plug from economizer element.
• Repairing Boiler Refractories
• Inspecting the Boiler
• Figure 2-20.—Front head open-gas-fired CB 125-150-200
• Figure 2-21.—Furnace liner refractory—125-150-200 hp
• Note
• Boiler Operations
• General Procedures
• Operating Procedures
• Normal Operation
• Securing Procedures
• Securing Procedures
• Safety
• Safety Precautions
• Unsafe Practices
• Lockout Devices
• Figure 2-23.—Multiple lock adapters
• Lockout Procedures
• Underground Systems
• Aboveground Systems
• Interior Steam Distribution Systems
• Two-Pipe Vapor System with a Return Trap
• Figure 3-6.—A two-pipe vapor system with a return trap
• Two-Pipe Vapor System with a Condensate Pump
• Two-Pipe Vapor System with a Vacuum Pump and a Condensate Return
• Steam Distribution System Components
• Radiator Air Vents
• Bucket Trap
• Figure 3-14.—A float thermostatic trap
• Pointers  on  Operating  Procedures
• Steam Trap Tests
• Water Tanks
• Temperature Regulators
• Expansion Joints
• Summary

Chapter 4 Heating Systems

• Figure 4-1.—Comparison of Fahrenheit and Celsius Thermometers
• Heat Transfer
• Liquefied Petroleum Gas
• Unit Heaters
• Electric Heaters and Installation
• Figure 4-6.—Gas-fired panel space heaters
• Oil-Fired Space Heaters
• Figure 4-9.—Low fire flame
• Figure 4-12.—Space heaters installed in series
• Unit Heater Maintenance
• Gravity System
• Figure 4-17.—Gas-fired vertical warm-air furnace
• Figure 4-19.—Air diffuser distribution
• Gas-Fired Furnaces
• Figure 4-21.—A typical gravity warm-air heating system (individual duct).
• Basic Components
• Gas Burners and Controls
• Figure 4-26.—Bunsen type of burner
• Figure 4-28.—A gas pressure regulator
• Figure 4-30.—A recycling solenoid valve
• Oil-Fired Furnaces
• Figure 4-35.—An electric switch type of relay.
• Figure 4-37.—Cutaway view of a typical oil-fired furnace
• Figure 4-39.—High-pressure gun type of oil burner
• Figure 4-42.—A horizontal-rotary oil burner.
• Figure 4-43.—Typical forced warm-air control system
• Figure 4-45.—Bimetallic strips: A. Typical strip; B. Expansion of the strip; C. With electrical switch
• Figure 4-46.—Various types of bimetallic strips
• Figure 4-48.—Schematic of a remote-bulb device
• Furnace Installation
• Figure 4-51.—Typical smoke pipe (flue) installation.
• Maintenance of Fuel Oil Systems
• Steam-Atomizing and Air-Atomizing Burners
• Oil-Burner Maintenance
• Flame Adjustment
• Fuel Pump
• Domestic Hot-Water Heating and Hot-Water Boilers
• Steel Hot-Water Boilers
• Operation of Hot-Water Boilers
• Pressure Gauge
• Gravity Systems
• One-Pipe, Closed-Tank System
• Forced-Circulation Systems
• Radiators
• Unit Heaters
• Special Flow Fittings
• Types of HTHW Systems
• Figure 4-75.—A typical cascade heater spray nozzle head
• Mechanical Gas Cushion
• Piping System Installation

Chapter 5 Galley and Laundry Equipment

• Steam Chests
• Steam Tables
• Dishwashers
• Figure 5-5.—A cutaway view of a double-tank automatic dishwasher
• Ranges
• Field Range
• Interceptors and Grease Traps
• Laundry Equipment
• Washer
• Figure 5-10.—Washer
• Maintenance and Repair
• Extractor
• Tumbler
• Maintenance and Repair
• Steam Generator
• Figure 5-15.—Rear view of tumbler
• Figure 5-16.—Flow diagram of the water and steam circuit in a generator
• Preventive Maintenance and Repair
• Figure 5-19.—Operating controls and component identification of Clayton steam generator, Model RO-33.PL, front view
• Figure 5-20.—Operating controls and component indentification of Clayton steam generator, Model RO-33-PL, rear view
• Figure 5-22.—Water pump discharge snubber
• Figure 5-23.—Ring thermostat control
• Residential Washing Machines
• Figure 5-25.—Fuel pressure switch.
• Figure  5-26.—Automatic  blowdown  valve.
• Figure 5-27.—A typical automatic residential washer
• Water Level Sensing Switch
• Figure 5-31.—A water level sensor scheme: A. Water level below the set point on the sensor; B. Water level at the set point
• Residential Clothes Dryers
• Installation
• Troubleshooting

Chapter 6 Refrigeration

• Measurement of Heat
• Specific Heat
• Day Ton of Refrigeration
• Scale Relationships
• Vaporization
• Figure 6-9.—Pressure temperature chart.
• Mechanical Refrigeration Systems
• Figure 6-14.—Refrigeration cycle
• Components
• Figure 6-16.—An external stationary bellows crankshaft seal.
• Figure 6-20.—Air-cooled condenser mounted on a compressor unit.
• Liquid Receiver
• Control Devices
• Figure 6-22—A. Thermostatic expansion valve; B. Automatic expansion valve
• Accessory Devices
• Figure 6-26.—Pressure-actuated motor control
• Pressure Control Switches
• Figure 6-30.—Pressure type cut-in, cutout control switch
• R-12 Dichlorodifluoromethane (CCI,F,)
• R-22 Monochlorodifluoromethane (CHCIF)
• Refrigerant Safety
• Refrigeration Equipment
• Walk-In Refrigerators
• Single Door Fresh Food Refrigerator
• Two-Door  Refrigerator-Freezer  Combination
• Figure 6-40.—Storage type of water cooler
• Effects of Moisture
• Location of Equipment
• Figure 6-44.—The defrost cycle of an ice cube machine.
• Figure 6-45.—A low-temperature screw or helix compressor system
• Multiple Compressors
• Figure 6-47.—Parallel compressors with separate condensers
• Summary
• Maintenance, Service, and Repair of Refrigeration Equipment
• Transferring Refrigerants
• Evacuating and Charging a System
• Refrigerant Leaks
• Electronic Leak Detector
• Recovery, Recycling, and Reclaiming Refrigerant
• Figure 6-56.—Three-way service valve positions
• Figure 6-58.—The liquid recovery method
• Removing Expansion or Float Valves
• Replacing an Evaporator
• Shaft Bellows Seal
• Compressor  Lubrication
• Maintenance of Motors
• Electrical Defects
• Grounds
• Troubleshooting Refrigeration Equipment
• Summary
• Summary

Chapter 7 Air Conditioning

• Dew-Point  Temperature
• Relationship of Wet-Bulb, Dry-Bulb, and Dew-Point Temperatures
• Circulation of Air
• Air-Conditioning Systems
• Self-Contained Air Conditioning Units
• Figure 7-8.—Air-handling components of a package type of room air conditioner
• Heat Pumps
• Cooling Cycle
• Chilled Water Systems
• Figure 7-13.—Rotary screw compressor unit
• Types of Coolers
• Water Cooled Condensers
• Cleaning Water Cooled Condensers
• Figure 7-18.—Cleaning water-cooled condensers with acid solution
• Coil Cleaning
• Fan Motors
• Fan Bearing Lubrication
• Seasonal Shutdown
• Safety Warnings
• Figure 7-19.—A package tower with a remote, variable speed pump.
• Induced Draft
• Forced Draft
• Compressors
• Figure 7-22.—High-speed (36,000 rpm) single-stage centrifugal chiller.
• Figure 7-24.—Small semisealed compressor
• Rotary Compressors
• Figure 7-27.—Rotary compressor: A. Part identification; B. Operation
• Centrifugal  Compressors
• Refrigerant-Flow  Controllers
• Motor Overload Protectors
• Step Controller
• Automotive Air Conditioning
• Automotive Compressors
• Compressor Service Valves
• Suction Pressure-Regulating Valves
• Service Precautions
• System Visual Inspection
• Cleaning a Badly Contaminated Refrigerant System
• System Cleaning and Flushing
• Truck and Bus Air Conditioning
• Heating, Ventilating, Air Conditioning, and Refrigeration Certification
• Types of Duct Systems
• Diffusers, Grilles, and Registers
• Fire Dampers
• Balancing the System

Appendix I Glossary

• Appendix I Glossary
• Appendix I Glossary
• Appendix I Glossary

Appendix II Tables for Maintenance Procedures

• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures
• Appendix II Tables for Maintenance Procedures

Appendix III Math Tables

• Appendix III Math Tables
• Appendix III Math Tables
• Appendix III Math Tables
• Appendix III Math Tables

Appendix IV Answer Key

• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key
• Appendix IV Answer Key

Appendix V References

Index

• Index
• Index
• Index

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