Retrotec DucTester 200 Series Residential Applications - Manual (Page 3)

Page 3 of 91
©Retrotec Inc. 2015
2.3 Problems from duct leakage: ................................................................................ 19
3. Locating Duct Leaks .................................................................................... 20
3.1 Types of duct leakage tests ................................................................................... 20
3.2 What is duct leakage to the outdoors? .................................................................. 20
3.3 What is duct leakage to the indoors? .................................................................... 20
3.4 How much duct leakage is acceptable under existing Codes? ................................ 21
3.5 Set up your DucTester for duct leakage testing ..................................................... 24
3.6 Unpack, connect the gauge to the DucTester ........................................................ 24
3.6.1. Charge the gauge .................................................................................................. 24
3.6.2. Make all connections on the gauge and fan ......................................................... 25
3.7 Blue Tube location matters when testing leaky ducts ............................................ 26
3.8 Connect the DucTester to the Duct System ........................................................... 27
3.8.1. Connect the Flex Duct to return register .............................................................. 27
3.8.2. OR Connect the Flex Duct to the air handler cabinet ........................................... 28
3.8.3. OR Connect the Flex Duct to a ceiling level return using a Flow Hood ................ 28
3.9 Prepare the Duct System for a test ........................................................................ 28
3.9.1. Before beginning the duct leakage test ................................................................ 28
3.10 Install Range Ring on fan....................................................................................... 29
3.11 Select a test direction ........................................................................................... 30
3.11.1. Setting up for depressurization ............................................................................ 30
3.11.2. Setting up for pressurization ................................................................................ 30
4. Set up the gauge to display Duct Leakage Results ....................................... 31
4.1 Mode setup for duct testing in the US ................................................................... 31
4.2 Mode Setup for various standards around the world ............................................. 32
4.3 Setting up the DM32 gauge for Duct Testing ......................................................... 33
4.4 Setting up and using the DM-2 gauge for Duct testing ........................................... 33
5. Conduct the Duct Leakage tests .................................................................. 35
5.1 Total Duct Leakage ............................................................................................... 35
5.2 Duct Leakage to Outdoors with 2 gauges and 2 fans .............................................. 36
5.2.1. Method #1: Set both duct and house to -25 Pa (or 25 Pa) .................................. 36
5.2.2. Method #2: Set duct to house pressure to 0 Pa (using DucTester gauge) .......... 37
5.3 Duct Leakage to Outdoors with 1 gauge and 2 fans ............................................... 38
5.4 Combined Total Duct Leakage and Duct Leakage to Outdoors Method .................. 41