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5.
Test Procedure - Steps 1 to 7 ...................................................................... 19
5.1
Step 1 - Prepare the gauge .................................................................................... 19
5.2
Step 2 – Determine test criteria and prepare the ducts .......................................... 20
5.3
Step 3 – Connect DucTester to ducts ..................................................................... 21
5.3.1.
Select a test direction ........................................................................................... 21
Setting up for pressurization ................................................................................................ 22
Setting up for depressurization ............................................................................................ 22
5.3.2.
Install Range Configuration on fan ....................................................................... 22
5.4
Step 4 –Tubing, control and power connections .................................................... 23
5.5
Step 5 – Set up Test Pressure and Area in Gauge ................................................... 25
5.6
Step 6 – Measure the Leakage .............................................................................. 26
5.7
Step 7 – Test Passes .............................................................................................. 26
5.8
If test fails ............................................................................................................ 26
5.9
If no Results are displayed (--) ............................................................................... 27
5.10
Cannot achieve test pressure ................................................................................ 28
6.
Finding duct leaks ....................................................................................... 29
6.1
Using a smoke puffer ............................................................................................ 29
6.2
Using theatrical smoke ......................................................................................... 29
6.3
Using an infrared camera ...................................................................................... 29
6.4
Using a wet hand .................................................................................................. 29
7.
Field Check the DucTester to find out what is not working ......................... 30
7.1
Field Check the gauge ........................................................................................... 30
7.2
Field Check the DucTester as a system .................................................................. 30
8.
Avoid common mistakes ............................................................................ 32
Appendix A: U.S. Duct Leakage Factors ............................................................. 33
8.1
Leakage Class........................................................................................................ 33
8.2
Leakage Class Calculation...................................................................................... 34
8.3
Pressure Class ....................................................................................................... 39
Appendix B: ..................................................................................................................... 40
U.S. Measurement Procedure for Leakage Factor ............................................................. 40
Pass Fail for U.S. tests ...................................................................................................... 42
Step 1 - Prepare the gauge - first time only ....................................................................... 43
Step 2 – Determine test criteria and prepare the ducts ..................................................... 43
