Chapter 21 Compressor Lubrication and Accessories ................................ 387 21.1 Refrigeration Lubrication ............... 387 21.2 Types of Refrigeration Lubricants ... 389 21.3 Compressor Lubrication ................ 390 21.4 Oil Separators ............................. 393 21.5 Adding Oil to a Compressor ........... 394 21.6 Removing Oil from a Compressor ... 396 21.7 Testing Oil for Acid ....................... 397 21.8 Determining Compressor Capacity .. 398 21.9 Volumetric Efficiency .................... 399 21.10 Compressor Cooling ................... 402 21.11 Compressor Mounting ................. 403 21.12 Compressor Data Plates ............. 406 Chapter 22 Water Chillers ................................411 22.1 What Are Chillers? ........................411 22.2 Vapor-Compression Chillers ...........412 22.3 Lithium Bromide Absorption Chiller .. 424 22.4 Ammonia Absorption-Type Refrigerator ................................ 428 Chapter 23 What Is Electricity? ..................... 431 23.1 Understanding Electricity .............. 431 23.2 Ohm’s Law ................................. 440 23.3 Power and Watts ......................... 443 23.4 Conductors ................................. 444 23.5 Direct Current (DC) ...................... 450 23.6 Alternating Current (AC) ............... 452 23.7 Polyphase Generation .................. 453 23.8 Equipment Grounding Conductor ... 455 23.9 Power Circuit Devices .................. 459 Chapter 19 Troubleshooting Refrigerant Flow Controls ............................. 355 19.1 The Troubleshooting Process ......... 355 19.2 Troubleshooting the AEV ............... 355 19.3 Troubleshooting a Capillary Tube System ............................... 358 19.4 Troubleshooting the TEV ............... 361 19.5 Troubleshooting Multiplexed Evaporators ................................ 363 19.6 Using Hand Valves ...................... 364 19.7 Troubleshooting EPRs .................. 365 19.8 Troubleshooting Solenoid Valves .... 365 19.9 Troubleshooting Head Pressure Controls ..................................... 366 19.10 Troubleshooting Hot-Gas Bypass Valves ............................. 366 Chapter 20 Compressors ................................ 369 20.1 What Is a Compressor? ................ 369 20.2 Types of Compressors .................. 369 20.3 Compressor Designs ................... 372 xvi Copyright Goodheart-Willcox Co., Inc.