Retrotec Commercial 441 and 451 DucTester User Manual

Retrotec Inc. Commercial DucTester Operation Manual Model 400 Blower Model 441, 451, 451 & 451 Syst

Page 10 of 56 ©Retrotec Inc. 2015 3. Model 451 DucTesters Models include 451 with 10-2.5 (250-63 mm) Adapter for 4 inch (100mm) Flex Duct A comple

Page 11 of 56 ©Retrotec Inc. 2015 stable in both the pressurization and depressurization test directions, where it offers equivalent accuracy in bo

Page 12 of 56 ©Retrotec Inc. 2015 When depressurizing, the Flex Duct must be removed in order to change the Ranges. CFM minimum CFM maximum Range

Page 13 of 56 ©Retrotec Inc. 2015 . Figure 4: Retrotec Model 400 has a speed control knob and two Ethernet style Speed Control Ports for daisy ch

Page 14 of 56 ©Retrotec Inc. 2015 Figure 6 Back view shows massive blower with cover and cooling openings. Figure 7: Self-referencing pressure

Page 15 of 56 ©Retrotec Inc. 2015 Figure 8: DM-32 digital gauge. Model 351 use the DM32 gauge while Model 352 signifies the WiFi enabled gauge tha

Page 16 of 56 ©Retrotec Inc. 2015 3.4.2. Umbilical for connecting fan and DM32 gauge An umbilical neatly bundles the needed pressure tubes and Con

Page 17 of 56 ©Retrotec Inc. 2015 4. Prepare for the Duct Leakage Test 4.1 Unpack, connect the gauge to the DucTester Prior to beginning any test,

Page 18 of 56 ©Retrotec Inc. 2015 4.2 Charge the gauge The rechargeable batteries should be charged when you get it but leave it on the charger ov

Page 19 of 56 ©Retrotec Inc. 2015 5. Test Procedure - Steps 1 to 7 5.1 Step 1 - Prepare the gauge Once the Gauge has been set up, all settings

Page 2 of 56 ©Retrotec Inc. 2015 Made by Retrotec Inc. 1060 East Pole Road Everson, WA USA 98247 For support: Call 1(888) 330-1345 in USA +1

Page 20 of 56 ©Retrotec Inc. 2015 5.2 Step 2 – Determine test criteria and prepare the ducts How the ducts are prepared will be impacted by th

Page 21 of 56 ©Retrotec Inc. 2015 5.3 Step 3 – Connect DucTester to ducts The DucTester has a 4 inch (100 mm) flex with a 4 inch (100 mm) collar

Page 22 of 56 ©Retrotec Inc. 2015 Setting up for pressurization The advantage of pressurizing is that it makes changing Range Rings on the fan easi

Page 23 of 56 ©Retrotec Inc. 2015 5.4 Step 4 –Tubing, control and power connections If the rechargeable batteries in the DM32 are below one q

Page 24 of 56 ©Retrotec Inc. 2015 Plug in the Speed Control Cable between DucTester and Gauge. Connect the Control Cable to the fan, unless you wis

Page 25 of 56 ©Retrotec Inc. 2015 5.5 Step 5 – Set up Test Pressure and Area in Gauge Default in gauge must match the specified Test Pressure. I

Page 26 of 56 ©Retrotec Inc. 2015 5.6 Step 6 – Measure the Leakage [Set Speed] to 1% then Jog up to the Test Pressure. WARNING: To prevent over-

Page 27 of 56 ©Retrotec Inc. 2015 5.9 If no Results are displayed (--) If the target pressure has been reached, but “--“ appears as a flow read

Page 28 of 56 ©Retrotec Inc. 2015 5.10 Cannot achieve test pressure If the DucTester fan reaches 100% speed on the “Range 74” Range Ring before

Page 29 of 56 ©Retrotec Inc. 2015 6. Finding duct leaks Locating leaks in the ducts can be a tricky process, and there are a number of methods tha

Page 3 of 56 ©Retrotec Inc. 2015 Copyright © 2014-2015 Retrotec Inc., All rights reserved. This document contains materials protected under Interna

Page 30 of 56 ©Retrotec Inc. 2015 7. Field Check the DucTester to find out what is not working Standard procedure says you calibrate your gauges ev

Page 31 of 56 ©Retrotec Inc. 2015 1. Tape the Field Calibration Plate to the Flex Duct Flange, and attach the blue tube to the pressure pickup (or

Page 32 of 56 ©Retrotec Inc. 2015 8. Avoid common mistakes The following mistakes are commonly made when performing a duct test, and can significan

Page 33 of 56 ©Retrotec Inc. 2015 Appendix A: U.S. Duct Leakage Factors When testing, these factors may have to be calculated prior to the test. I

Page 34 of 56 ©Retrotec Inc. 2015 Table 4-1 Leakage Class Duct Construction Class ½″, 1″, 2″ wg 3″ wg 4″, 6″, 10″ wg Seal Class C B A Sealing appl

Page 35 of 56 ©Retrotec Inc. 2015 Figure 18 Leakage Class lookup table. Leakage Class, CL@ Pressure, in WC >>>0.2 0.5 1 2 3 4 6 8 10Le

Page 36 of 56 ©Retrotec Inc. 2015 Leakage Factor Leakage Factor, F, is the maximum allowable leakage in CFM per 100 square feet of ductwork (not c

Page 37 of 56 ©Retrotec Inc. 2015 Leakage Factor from the formula F= CL x P 0.65 Where: CL is the Leakage Class P is the Test Pressure in in WC 0

Page 38 of 56 ©Retrotec Inc. 2015 Leakage Factor from a table Test Pressure, in WC Leakage Factor, F in CFM/100 square feet Class 3 Class 6 Class

Page 39 of 56 ©Retrotec Inc. 2015 8.3 Pressure Class Duct pressure classifications The duct system designer should designate the Pressure

Page 4 of 56 ©Retrotec Inc. 2015 5. Test Procedure - Steps 1 to 7 ... 19 5.1 S

Page 40 of 56 ©Retrotec Inc. 2015 Appendix B: U.S. Measurement Procedure for Leakage Factor

Page 41 of 56 ©Retrotec Inc. 2015 How much duct surface area can be tested at one time? The table below shows the maximum surface area that one Mod

Page 42 of 56 ©Retrotec Inc. 2015 U.S. Measurement Procedure for Leakage Factor or Leakage Class Test Technician ________________________________

Page 43 of 56 ©Retrotec Inc. 2015 Step 1 - Prepare the gauge - first time only Once the Gauge has been set up, all settings are restored when the g

Page 44 of 56 ©Retrotec Inc. 2015 Step 3 – Connect DucTester to ducts □ Attach 4 inch Flange to ductwork. □ Attach 4 inch collar on flex to flan

Page 45 of 56 ©Retrotec Inc. 2015 Step 6 – Measure Leakage Factor in CFM/100 sq ft □ [Set Speed] to 1% then Jog up to the Test Pressure. WARNING:

Page 46 of 56 ©Retrotec Inc. 2015 Appendix C: U.S. Measurement Procedure for CFM at Test Pressure The

Page 47 of 56 ©Retrotec Inc. 2015 When CFM is being measured at the specified Test Pressure, a sheet is often used where there are multiple duct r

Page 48 of 56 ©Retrotec Inc. 2015 How much duct surface area can be tested at one time? The table below shows the maximum surface area that one Mod

Page 49 of 56 ©Retrotec Inc. 2015 Measurement Procedure for CFM at Test Pressure or Percent Leakage Test Technician _____________________________

Page 5 of 56 ©Retrotec Inc. 2015 Step 3 – Connect DucTester to ducts ...

Page 50 of 56 ©Retrotec Inc. 2015 Step 1 - Prepare the gauge - first time only Once the Gauge has been set up, all settings are restored when the g

Page 51 of 56 ©Retrotec Inc. 2015 Step 2 – Prepare the ducts □ Determine the Pressure Class Use specified value. If not specified, use a Pressure

Page 52 of 56 ©Retrotec Inc. 2015 Step 5 – Set up Test Pressure in Gauge □ Default in gauge must match the specified Test Pressure If not, tap [

Page 53 of 56 ©Retrotec Inc. 2015 Appendix D: Calculate Air Flow based on Channel B Fan Pressure readings The air flow being produced by the calib

Page 54 of 56 ©Retrotec Inc. 2015 Appendix E: Troubleshooting Occasionally simple problems do occur with a DucTester system. If the problem is d

Page 55 of 56 ©Retrotec Inc. 2015 Appendix F: Glossary Term Definition “ wg See “in WC” CFM Units: Cubic feet per minute (the units of volumetri

Page 56 of 56 ©Retrotec Inc. 2015 Term Definition Pascal (Pa) Often shown as “Pa”. A very small metric unit of pressure. There are 249 Pascals in

Page 6 of 56 ©Retrotec Inc. 2015  Keep hands, hair and clothing away from fan at all times.  The fan can cause damage or injury if it were to f

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Page 8 of 56 ©Retrotec Inc. 2015 1. Model 300 / 400 System Types: The Model 400 indicated the fan body. Model 451 is used to show it comes with a

Page 9 of 56 ©Retrotec Inc. 2015 2. Types of Duct Leakage Tests Locate the step by step Quick Guide that came with your equipment or access it at