xx xx x Chapter 17: Electrical Troubleshooting Fundamentals Using an In-Line Ammeter ................................379 Testing a Hermetic Compressor’s Winding Insulation ............................................382 Chapter 18: Servicing Electric Motors and Controls Discharging and Testing a Capacitor ................399 Measuring Capacitance ....................................400 Checking Hermetic Compressors for Continuity and Shorts ..................................403 Checking Hermetic Compressors for Shorts to Ground .........................................404 Hard Start Method of Servicing a Stuck Hermetic Compressor ......................................404 Finding Connection Problems in a Fan Motor Circuit .....................................................405 Chapter 19: Compressors Determining Compressor Speed ......................421 Chapter 25: Installation and Troubleshooting of Domestic Refrigerators and Freezers Pinpointing a Restriction ...................................638 Chapter 26: Service and Repair of Domestic Refrigerators and Freezers Preparing a Domestic Refrigerator or Freezer for Internal Service ..........................646 Removing a Hermetic Compressor ..................647 Installing a Replacement Compressor ..............648 Repairing a Stainless Steel Evaporator ............650 Repairing an Aluminum Evaporator ..................650 Replacing a Filter-Drier .....................................652 Testing a Thermostat ........................................655 Chapter 28: Air Quality Cleaning an Ultraviolet Air Treatment System .............................................................. 711 Chapter 29: Air Distribution Riveting a Joint Using a Pop Rivet Tool ............733 Using Mastic to Seal a Duct Joint .....................733 Installing Insulation into Square Ductwork .......734 Duct Sizing Procedure ...................................... 742 Sizing Ducts Using the Friction Chart ............... 746 Chapter 30: Ventilation System Service Performing a Blower Door Test .........................762 Cleaning Ductwork ...........................................768 Balancing a System—Long Method .................768 Balancing a System—Short Method ................768 Washing an Electronic Air Cleaner Filter ..........771 Chapter 36: Thermostats Troubleshooting a Heating System with a Low-Voltage Thermostat ........................936 Diagnosing a High Current Draw on a Transformer ..............................................937 Diagnostics Using a Line-Voltage Thermostat .......................................................938 Troubleshooting a Zoned System .....................946 Chapter 39: Hydronic Heating Fundamentals Purging a Series Loop System .......................1035 Purging a One-Pipe System with Primary and Secondary Loops ....................................1036 Purging a Two-Pipe Zoned System with Zone Circulating Pumps ..........................1036 Purging a Two-Pipe Zoned System with Zone Valves .............................................1038 Purging a Hydronic System Filled with Glycol Solution ........................................1039 Recharging a Horizontal Expansion Tank .......1041 Recharging a Diaphragm Expansion Tank .....1041 Boiler Inspection and Maintenance ................1042 Chapter 41: Gas-Fired Heating Systems Heat Exchanger Leak Test Procedure ............ 1103 Chapter 42: Oil-Fired Heating Systems Stack Temperature Test Procedure ................. 1120 Draft Test Procedure ....................................... 1121 Smoke Test Procedure .................................... 1122 Manually Bleeding an Oil Furnace .................. 1146 Chapter 43: Electric Heating Systems Testing Heating Elements ............................... 1178 Replacing Baseboard Heating Units............... 1178 Chapter 45: Energy Management Troubleshooting a Building Ethernet/IP Communication Fault ......................................1223 Troubleshooting a Controller and Cable Loss of Signal .................................................1223 Troubleshooting to Component Level .............1224 Troubleshooting an Electrical Failure ..............1224