{ "item_title" : "Inverter Mini Split Systems Handbook", "item_author" : [" Lennox Harwick "], "item_description" : "Inverter-driven ductless heat pumps are a major HVAC technology for residential and light-commercial applications. Servicing these systems requires knowledge of thermodynamics, refrigeration, power electronics, electrical code, load calculation, controls, commissioning, and systematic diagnostics. The Inverter Mini Split Systems Handbook is a comprehensive technical reference for mastering that workflow.Spanning 379 pages and 16 chapters across four functional groups, the handbook takes inverter ductless technology from first principles through professional service. Each chapter includes learning objectives, technical explanations, derivations, worked numerical examples, practice problems with answer keys, and chapter summaries. Standards and regulations from ASHRAE, NEC, AHRI, and EPA are cited throughout.GROUP I - FOUNDATIONS (Chapters 1-4)Covers refrigeration fundamentals, vapor-compression cycles, thermodynamic properties, P-H diagrams, COP, Carnot efficiency, temperature glide, superheat, and subcooling. Inverter technology includes AC power, rectifier/DC bus/PWM circuits, power factor correction, BLDC and PMSM motors, variable-speed operation, part-load efficiency, SEER2, HSPF2, and fault codes. System architecture covers indoor units, reversing valves, electronic expansion valves, TXVs, accumulators, and single- and multi-zone circuits. Refrigerant topics include A2L classification, EPA Section 608, the AIM Act HFC phasedown, PPE, and safe handling.GROUP II - DESIGN AND INSTALLATION (Chapters 5-9)Covers Manual J load calculations, design conditions, SHR, AHRI performance data, ACCA Manual S selection, heating-capacity derating, balance point, multi-zone compatibility, piping limits, and ASHRAE 62.2 ventilation integration. Electrical topics include NEC Article 440 MCA/MOCP, conductor sizing, derating, voltage drop, overcurrent protection, disconnects, grounding, bonding, communication wiring, and power quality. Installation includes system design, refrigerant charge, A2L requirements, indoor-unit selection, line-set routing, insulation, mounting, condensate drains, ACR copper, nitrogen-purged brazing, flaring, torque, and pressure testing.GROUP III - STARTUP, COMMISSIONING, AND OPERATION (Chapters 10-12)Covers evacuation, vacuum decay testing, charge determination, charging by weight, charge verification, leak testing, pre-startup inspection, self-test, commissioning data collection, psychrometric verification, multi-zone balancing, documentation, and heating-mode commissioning. Controls include operating logic, thermostats, BMS and smart-home integration, communication protocols, defrost operation, DIP switches, and service modes.GROUP IV - SERVICE AND ADVANCED TOPICS (Chapters 13-16)Presents structured diagnostics for refrigerant, inverter/electrical, sensor, mechanical, and communication faults using diagnostic matrices and commissioning baselines. Performance topics include EER, COP, SEER2, HSPF2, field capacity testing, seasonal efficiency, low-temperature heating, airflow measurement, efficiency degradation, and optimization. Preventive maintenance covers indoor and outdoor units, coils, filters, condensate systems, refrigerant circuits, electrical components, records, and seasonal procedures. Advanced topics address cold-climate and hyper-heat systems, EVI and flash injection, low-ambient capacity, supplemental heat, commissioning, diagnostics, and maintenance.Build technical command through derivations, calculations, worked examples, practice problems, and field-oriented procedures. Add the handbook to your professional library and develop a deeper technical understanding of modern inverter-driven ductless heat pump systems.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/9/79/819/302/9798193028475_b.jpg", "price_data" : { "retail_price" : "79.99", "online_price" : "79.99", "our_price" : "79.99", "club_price" : "79.99", "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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