Retrotec 450 Series User manual

Depressurization kit
(450x standard / 440x optional)
rev 2020-02-11
Extra Tubing &
Tubing Accessory Kit
Flex Duct

Blank off ductwork
Ensure sealing is complete
Prepare the ducts
47
Connect Flex to ducts
Attach 4” (100mm) Flex to ductwork
Install Range 47 Flow Plug
Connect Flex to Fan
Connect Flex Duct to fan outlet for
pressurization
Inlet with Flow Plugs
Inlet
with Range Plugs
airflow
Outlet
On Model 450 you can depressurize ducts
by attaching the Adapter onto Fan inlet and
attaching the Flex to it
Flex connects here
Flex duct adapter
Connect tubes & controls
Connect yellow and green tubes between
DucTester and gauge
Plug in Speed Control Cable between
DucTester and Gauge

Plug in power source
Connect blue tube to gauge and to ducts using
static probe or connection on flange
Connect tubes & controls cont’d
Prepare Gauge for the test
Tap [Settings] > > [Default Pressure] and
enter Test Pressure. Tap to return Home.
If your flow units include area, tap [Area], then
use number pad to enter and tap [Set]
Visit retrotec.com/software.html to download
Connect Gauge to a laptop and have FanTestic
run the test according to any Standard,
Test Passes
Complete test reports
Remove temporary seals
WARNING! Test pressures may exceed 20 in WC
(5000 Pa). Start slowly!
[Set Speed] to 1% the Jog up to the Test Pressure
Tap “@” on the display and “Flow at Test”
Pressure will appear
Jog fan speed up but do not exceed the
Pressure Class
Read results from the Gauge
Run the test

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] 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 and try again.
- Change [Range] on the gauge to match.
- Check seals on all registers. Look for
disconnected ducts or ducts open to outdoors
Flow in [Channel B] reads “--” at test pressure?
Desired results not achieved?
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.
Get the results you need
Tap on the gauge and select the range
to match your fan, whenever a Range
Plug is changed.
Tap the [Channel B] key to select a different
Result, or tap the [Result to be displayed] key
on the [Settings] menu.
18 29 47 74
Use smaller Range number for tighter ducts,
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.
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
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.
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.
Repeat between different ports with each of the
tubes you use for testing.
Field check gauge weekly