by Poe Eden
Become the tech everyone trusts. This beginner-friendly field guide walks you, step by step, through safe refrigerant handling, accurate charging, and reliable diagnostics-so every service call ends with a system that performs to spec.
What you'll learn inside Safety & handling: PPE, cylinder use, hose management, recovery, evacuation, and leak-prevention best practices. Tools that matter: manifold and digital gauges, temperature probes, scales, micron gauges, vacuum pumps, recovery machines, and leak detectors-plus how to use them correctly. Charging done right: pressure-temperature basics, weighing in a charge, superheat and subcooling methods, targets for TXV vs. fixed-orifice systems, and verifying airflow before charging. Diagnostics you can trust: reading suction/head pressures, spotting non-condensables, icing, restrictions, short cycling, compressor faults, and electrical or airflow issues-with quick decision trees. Service procedures & maintenance: deep vacuum to target microns, nitrogen pressure testing, filter-drier and line-set practices, moisture/acid mitigation, and documentation checklists. Free video tutorial includedScan the QR code inside (or use the link provided) to access a concise video series demonstrating the book's core procedures-gauging, evacuation, charging by SH/SC, and common fault diagnosis-so you can see each step before you do it.
Apprentices, facility maintenance teams, HVAC students, and new technicians who want clear, repeatable processes backed by practical checklists and reference tables.