Retrotec 441 User manual

441/451 Commercial DucTester QuickGuide
Prepare the gauge, rst time only
1
Home screen must show Model 450 on
Range 47.
If not, tap the device icon, then
Tap until “Retrotec DucTester” appears.
Tap then tap
www.retrotec.com Support: [phone] International: [phone] Made in Everson, WA, USA
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DucTester
Flex
Channel A
Channel B
Umbilical
Extra tubing
Range plugs DM32 20A gauge
Gauge case System case
Battery ChargerTubing
Accessory Kit
QuickGuides
Change
Device
...
If units on Channel A and B are NOT correct
If time average is NOT “5 s avg”
- Tap [Settings] > [Results to be displayed]
- Tap [Pressure:] to change pressure
- Tap [Flow:] or [Flow/Area] to change ow
units
- Tap to return Home.
- Tap [Settings] > [Time Averaging] “5 seconds”
- Tap to return Home.

Prepare the ducts
Connect tubes & controls
Connect Flex to Fan
Connect Flex to ducts
2
5
4
3
Ensure sealing is complete
Blank off ductwork
Connect yellow and green tubes between
DucTester and gauge
Plug in the Speed Control Cable between
DucTester and Gauge
Install Range 47 Flow Plug
Attach 4 inch (100 mm) Flex to ductwork
Connect Flex Duct to fan outlet for
pressurization
On Model 451 you can depressurize ducts
by attaching the Adapter onto Fan inlet and
attaching the Flex to it
47
Inlet
with Range Plugs
airow
Outlet
airow
Inlet with
Flow Plugs
Flex duct
adapter
Flex connects
here
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Connect tubes & controls cont’d
Run the test
Prepare Gauge for the test
Test Passes
5
7
6
8
Connect Gauge to a laptop and have FanTestic
run the test according to any Standard
visit www.retrotec.com/products/fantestic
to download
Connect blue tube to gauge and to ducts using
static probe or connection on ange
Plug in to power source
[Set Speed] to 1% then Jog up to the Test
Pressure
Tap “@” on the display and “Flow at Test
Pressure” or “Flow/Area at Test Pressure” will
appear
Jog fan speed up but do not exceed the Pressure
Class
Read results from the Gauge.
Tap [Settings] >> [Default@Pressure] and
enter Test Pressure. Tap to return Home.
If your ow units include area, tap [Area], then
use number pad to enter the area and tap [Set]
Complete test reports
Remove temporary seals
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...
WARNING! Test pressures may exceed 20 in
WC (5000 Pa). Start slowly!
!

Get the results you need
Desired results not achieved?
Field check gauge weekly
Additional troubleshooting
Tap the [Channel B] key to select a different
Result, or tap the [Result to be displayed] key
on the [Settings] menu.
Flow: CFM (m3/h) - Flow at the induced pressure is
the simplest result.
Flow/Area: CFM/100 sq ft (m3/(h*m2) or m3/
(s*m2) or liters/(s*m2)) - Flow in CFM per 100
square feet (or m3/(h·m2) may be required. Requires an
area to be entered.
When a Result is chosen that requires an area,
[Area] will be shown on the Home screen. Tap it
to enter the area.
The area can also be changed from the
[Settings] menu.
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 ow.
Cannot achieve test pressure at full speed?
If fan reaches 100% speed before reaching
test pressure:
- Switch to a lower Range Plug
- Change [Range] to match
- Re-adjust fan speed
- Change to a higher Range Plug and try again.
- Change [Range] on the gauge to match.
- Check seals on all registers. Look for
disconnected ducts or ducts open to outdoors.
Set [Time Average] to 5 seconds in [Settings].
Tap [Channel B] and select“Pressure: Pa”.
Connect the yellow tube between the red and
yellow ports.
Check gauge operation and check for blocked, leaking
or pinched tubes weekly, and anytime results are in
question. This will eliminate a common source of error.
To perform the gauge check, you will need the
gauge and Umbilical.
Visit www.retrotec.com/support for more support
options such as FAQ, Webinars, Manuals, Tech
Support, and Repairs.
Repeat between different ports with each of the
tubes you use for testing.
If readings on Channel A and Channel B are
within 2% and don’t drop rapidly, the tube is
not blocked or leaking and the gauge is correct.
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Tap on the gauge and select the range
to match your fan, whenever a Range
Plug is changed.
Use smaller Range number for tighter ducts,
and larger number for leakier ducts.
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18 29 47 74