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Oriflow Cobra Operating Instructions Manual

Duct leakage testers
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Operating Instructions for
Cobra and Lynx
Duct Leakage Testers
© Copyright 2018 ORIFLOW LLC

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Summary of Contents for Oriflow Cobra

  • Page 1 Operating Instructions for Cobra and Lynx Duct Leakage Testers © Copyright 2018 ORIFLOW LLC...
  • Page 2 Links to Online Help (QR Code) Video – Commercial Duct Leakage Online Technical Library Testing Online Max Leakage Calculator Online Max Leakage Calculator (SMACNA Leakage Class) (% Allowable) Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers Rev: 01/2018...

  • Page 3: Table Of Contents

    Power Requirements …………………………………..…………….……...….……… Extension Cord Requirements ………………………..…………….……...…………. Flex-Duct Length ………………………………………...…………………….……...…. Determining Maximum Allowable Leakage ….………..……………...…….….……… FREE Oriflow duct test summary form (SMACNA or DW/143) ………….….………. Determining Which Orifice Plate to Use ……………..……………..……..…………. 6 - 7 Duct Leakage Test Setup and Procedure Install Orifice Plate and Upper Tube Section ……………………………..………..….

  • Page 4: Introduction

    Introduction These operating instructions are for ORIFLOW models COBRA and LYNX air leakage testers. Take pride in knowing that you have purchased the best air leakage tester on the market. It is no secret that Oriflow manufactures the highest quality testers, and has unparalleled customer service and technical support.

  • Page 5: Prior To Testing

    Table 2 – Tester Amp Draw Flow Control Full Load Tester Model Voltage Option Amps Lynx Slide Gate 12.7 Cobra Slide Gate 12.8 Cobra 14.0 Cobra Slide Gate Cobra Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers Rev: 11/2018...

  • Page 6: Extension Cord Requirements

    If the specification uses SMACNA Leakage Class or Pressure Classification, you will need to calculate the total duct system surface area. Oriflow has a FREE Adobe test summary sheet that will calculate duct surface area, leakage, leakage factor, allowable leakage, and Pass/Fail criteria. You can find these test summary sheets at (www.oriflow.com/freeform).

  • Page 7: Determining Which Orifice Plate To Use

    For example, if you are testing a system at 4 in.wg. pressure and the maximum allowable leakage is 350 cfm, you will need a 3-inch orifice plate if using the Cobra tester (see Table 6) or a 4-inch plate if using the Lynx tester (Table 7).
  • Page 8 LYNX Tester System Static Minimum Maximum Maximum Pressure Leakage** Leakage Leakage (in.wg.) (cfm) (cfm) (cfm) 0.10 ** Recommended minimum based on 0.40 in.wg. across orifice plate. Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers Rev: 01/2018...

  • Page 9: Duct Leakage Test Setup And Procedure

    Refer to Figures 1 through 4. Figure 1 – Install Orifice Plate and then Rotate Clockwise Figure 2 – Rotate Orifice Plate Clockwise until it Locks in Place Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...
  • Page 10 (Figures 3 and 4). Figure 3 – Install Upper Tube Section and Rotate Clockwise Figure 4 – Tighten Wing Nuts after Rotation Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers Rev: 01/2018...

  • Page 11: Connect Flex-Duct To Orifice Tube

    DUCT SYSTEM gauge so that 6 to 12 inches of tubing is inside the duct system. Using putty or duct tape, seal the connection. See Figure 8. Operating Instructions for Cobra © Copyright 2018...
  • Page 12 Connect Flex-Duct and Static Pressure Tap to Duct System (continued) Figure 6 – Connection to Duct System Figure 7 – Connection to Duct System using Static Pressure Tap Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...

  • Page 13: Duct Leakage Test Setup (Supply)

    DUCT SYSTEM pressure gauge, move the pressure tubing to the pressure port labeled SUPPLY SYSTEM. Figure 8 – Duct Leakage Test Setup for a SUPPLY System Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...

  • Page 14: Duct Leakage Test Setup (Return/Exhaust)

    You will determine the leakage of the system since the air drawn from the blower is discharged through the orifice plate which you are measuring. Figure 9 – Duct Leakage Test Setup for a RETURN/EXHAUST System Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...

  • Page 15: Zeroing Pressure Gauges

    6. Press MENU button two times to get back to the pressure reading. 7. Pressure should be reading zero or within +/- 0.02 in.wg. If not, repeat steps. Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...

  • Page 16: Avoiding Over-Pressurization

    See Figures 12. Figure 12 – Obtaining System Test Pressure (inlet slide model on left, VFD speed control model on right) Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers Rev: 01/2018...

  • Page 17: Obtaining System Test Pressure

    Always refer to the calibration certificate(s) that came with your calibrated orifice plate(s). Figure 14 – Orifice Plate Pressure Drop (analog on left, digital on right) Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...
  • Page 18 Using a calculator, take the square root of the ORIFICE PLATE gauge reading first, and then multiply by the constant for your orifice plate (for this example, the constant is "133.357"). The exact leakage is 134.42 x (square root of 2.46) = 210.8 cfm. Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...

  • Page 19: Troubleshooting

    Open duct end that was supposed to be sealed/capped-off for the leak test. A non-toxic smoke machine is an excellent tool for locating significant sources of leakage. Call ORIFLOW at 727-400-4881 or to our website at www.oriflow.com for more information. Operating Instructions for Cobra ©...

  • Page 20: Can't Obtain System Test Pressure (Duct Pressure Too High)

    If you feel a lot of air coming out of the tube end, you should see a pressure reading on the gauge ORIFICE PLATE. Operating Instructions for Cobra © Copyright 2018 and Lynx Duct Leakage Testers...

  • Page 21: Orifice Plate Gauge Reading Maxed Out

    Use the next larger sized orifice. GFI/GFCI trips We are aware of this happening only when using a Cobra duct leakage tester with the VFD, or variable speed drive option. We have found that in these cases, the supply wiring has ground wired to neutral, which can cause the GFI to activate when the VFD is operating.
  • Page 23 ORIFLOW LLC 2125 Range Rd., Unit B Clearwater, Florida 33765 Customer Service: 727-400-4881 Technical Support: 727-207-8973 sales@oriflow.com © Copyright 2018 ORIFLOW LLC...

This manual is also suitable for:

Lynx

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