retrotec 440x Commercial DucTester User Guide
- October 30, 2023
- retrotec
Table of Contents
retrotec 440x Commercial DucTester
Prepare the DM32X
- Power on the DM32X.
- Connect yellow, green, and blue tubes to the gauge.
- Tap [Change Device] and select the 440 or 450 DucTester.
- Tap [Change Range) and select Range 47.
- Tap [Channel BJ to change the type of result or units. Select based on “Get The Results You Need” on the QuickGuide instructions below
- Tap [Settings) then [Time Averaging) and select 5 Seconds.
- Tap [Settings] then [Default @ Pressure] and enter Test Pressure.
- Return to main screen.
- If your flow units include area, tap [Area], then use number pad to enter and tap [Set].
Prepare the Ducts
- Ensure sealing is complete.
- Blank off ductwork.
See Manual for Due Tester Operation Model 440x_ 450x for additional information.
Connect Flex to Ducts
- Attach 4″ (100mm) Flex to ductwork.
- Install Range 47 Range Plug.
Connect Flex to Fan
- Connect Flex Duct to fan outlet for pressurization
- On Model 450 you can depressurize ducts by attaching the Adapter onto Fan inlet and attaching the Flex to it
Connect Gauge & Fan
- Plug in the power adapter. Blue light indicates that the power is connected.
- Connect yellow and green tubes to matching color ports on the rem.
- Plug in Speed Control Cable between DucTester & Gauge.
- Connect blue tube the duct using a static probe or connection on flange.
Conduct Test
WARNING! Test pressures may exceed 20 in WC (5000 Pa). Start slowtyi
- [Set Speed] to 1% then jog up to the Test Pressure.
- D Tap [@) on the display and “Flow at Test” Pressure will appear
- D Jog fan speed up but do not exceed the Pressure Class
- D Read Results rom the Gauge.
- If test passes, complete test reports & remove temporary seals.
FanTestic
- Connect Gauge to a laptop and have FanTestic run the test according to any Standard.
- Visit retrotec.com/software.html to download
Desired results not achieved?
Flow in [Channel B] reads”–” at test pressure?
If the test pressure has been reached, but “–” appears, the fan is running too
slowly to accurately measure flow.
- Switch to a lower Range Plug
- [Change Range] on the gauge to match
- Re-adjust fan speed
Cannot achieve test pressure at full speed?
If fan reaches 100% speed before reaching test pressure: Change to a higher
Range Plug, Change [Range] on the gauge to match and try again.
Check seals on all registers. Look for disconnected ducts or ducts open to outdoors.
Field check gauge weekly
Check for gauge accuracy, blocked, leaking, or pinched tubes weekly, and anytime results are in question.
- Check the gauge with the tubes in the Umbilical.
- Set [Time Average] to 5 seconds in
- [Settings].
- Tap [Channel BJ and select “Pressure: Pa”
- Connect the red tube between the red and yellow ports.
- If readings on Channel A and Channel B are within 2% and don’t drop noticeably in 5 seconds, the gauge is functioning correctly.
- Remove red tubes and repeat with the yellow tube between the blue and green ports.
Get the resu Its you need
Tap [Channel BJ on the screen to select a different result, or tap the [Results to be Displayed] button in the [Settings] menu.
- Flow at the induced pressure is the simplest result.
- Flow in CFM per square foot (or m3/(h·m2) may be required. (Enter an Area).
- When a Result is chosen that requires a Area or Volume, Area or Volume will be shown on the Home Screen. Tap to Change. The area can
Use smaller Range number for tighter duds, and larger number for leakier ducts
.
Additional troubleshooting
Visit www.retrotec.com/support for more support options such as FAQ Webinars, Manuals, Tech Support, and Repairs.