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Learn how to purge and pressure test an HVACR system with nitrogen using the MalcoEdge NRHD Nitrogen Regulator and a two-valve manifold. This Malco Tool School episode covers why nitrogen purging and pressure testing are important, how to set up the system for nitrogen flow, purging the system, pressurizing to the manufacturer-recommended test pressure, bubble testing joints, monitoring pressure over time and safely venting nitrogen before moving on to evacuation and decay testing. Always follow the system manufacturer’s recommended test pressures and test times, as requirements vary by manufacturer and system. Explore MalcoEdge HVACR tools and professional trade solutions: malcogrp.com 0:00 Introduction 0:21 Why Purge & Pressure Test with Nitrogen? 1:14 Setting Up the Nitrogen Regulator 2:23 Connecting the Manifold & Nitrogen 2:50 Purging the HVACR System 3:30 Nitrogen Pressure Test Setup 4:58 Pressurizing the System 5:16 Bubble Testing for Leaks 5:50 Monitoring the Pressure Test 6:18 Accounting for Temperature Changes 6:40 Venting the Nitrogen 7:22 Evacuation & Decay Testing
