{ "item_title" : "Modern Commercial Refrigeration for Air Conditioning Technicians", "item_author" : [" Calder V. Rennick "], "item_description" : "What changes when an air-conditioning technician steps into commercial refrigeration? The physics may be familiar, but the stakes, controls, loads, refrigerants, and service decisions are different.Modern Commercial Refrigeration for Air Conditioning Technicians is a practical, field-focused guide for HVAC professionals ready to expand beyond comfort cooling into walk-ins, reach-ins, display cases, freezers, multi-evaporator systems, and other commercial applications.Built around evidence-based troubleshooting rather than guesswork, this book shows you how to connect temperature, pressure, airflow, electrical measurements, controller data, system load, and operating sequence before making a diagnosis.Inside, you'll learn how to: Transition from comfort cooling to product-focused refrigerationUnderstand refrigeration loads, saturation, superheat, subcooling, and system performanceWork responsibly around low-GWP refrigerants, blends, R-290, CO₂, oils, and changing service requirementsDiagnose evaporators, condensers, compressors, metering devices, defrost systems, and refrigerant circuitsRead electrical diagrams and troubleshoot motors, contactors, sensors, safeties, VFDs, and electronic controlsApply installation, piping, evacuation, charging, commissioning, and verification practicesUse structured diagnostic paths, worked examples, case files, checklists, applied problems, and hands-on labsWhether you are an experienced AC technician, apprentice, student, instructor, or independent HVACR professional, this guide helps you build the disciplined diagnostic habits needed for modern commercial refrigeration.Move beyond symptom chasing. Learn to observe, test, isolate the cause, correct it, and verify the result.", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/9/79/819/316/9798193163060_b.jpg", "price_data" : { "retail_price" : "145.99", "online_price" : "145.99", "our_price" : "145.99", "club_price" : "145.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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