Retrotec Commercial 441 and 451 DucTester - Manual (Page 5)

Page 5 of 56
©Retrotec Inc. 2015
Step 3 – Connect DucTester to ducts ................................................................................ 44
Step 4 –Tubing, control and power connections ............................................................... 44
Step 5 – Set up Test Pressure and Area in Gauge .............................................................. 44
Step 6 – Measure Leakage Factor in CFM/100 sq ft ........................................................... 45
Step 7 – Test Passes ......................................................................................................... 45
If ducts fail, measure the Leakage Class ............................................................................ 45
Appendix C: ..................................................................................................................... 46
U.S. Measurement Procedure for CFM at Test Pressure .................................................... 46
Measurement Procedure for CFM at Test Pressure or Percent Leakage ............................. 49
Pass Fail for U.S. tests ...................................................................................................... 49
Step 1 - Prepare the gauge - first time only ....................................................................... 50
Step 2 – Prepare the ducts ............................................................................................... 51
Step 3 – Connect DucTester to ducts ................................................................................ 51
Step 4 –DucTester tubing, control and power connections ............................................... 51
Step 5 – Set up Test Pressure in Gauge ............................................................................. 52
Step 6 – Run test .............................................................................................................. 52
Step 7 – Test Passes ......................................................................................................... 52
Appendix D: Calculate Air Flow based on Channel B Fan Pressure readings ...... 53
Appendix E: Troubleshooting ........................................................................... 54
“--” appears on display: ................................................................................................... 54
Gauge “Flow” reading does not change? Turn off [@] ...................................................... 54
Fan does not run .............................................................................................................. 54
Appendix F: Glossary ........................................................................................ 55
Important equipment-related safeguards
When using electrical appliances, basic safety precautions should always be followed. If Retrotec
equipment is used in a manner that does not follow the information provided in this manual, safety to
the operator and equipment performance may be impaired.
Please read the following carefully before using your DucTester:

Avoid contact with moving parts.

Special attention should be made to keep children and pets away from the fan when it is
operating.

Do not insert anything into the fan casing while the fan is moving.

Ensure that no debris is inside the fan casing before operating the fan.