Retrotec DucTester 351 - Manual (Page 2)

Make sure DucTester 350 is showing on the
Home screen.
If not, tap the fan picture, then
Tap , tap DucTester 350, then select the
range that you have installed.
Tap on [Channel B] to change the type of result
or units. Select based on “Get the results you
need” on page 4.
Tap [Settings] then [Time averaging] and
select 5 seconds.
Tap [Settings] then .
Make sure the [Default @ Pressure] is 80, 160,
or 250 Pa, depending on the test pressure you
need. Make sure “n” value is set to 0.60 for Ducts.
Tap to return to the Home screen.
Step 1: Prepare ducts and house
□
Seal all supply and return grills/registers, including
any exterior air inlets, with Grill Mask or tape.
□
Open all interior doors leading to rooms containing
a supply or return register, and open an exterior door
or window.
□
Shut off all HVAC (A/C, furnaces).
Page 2 of 4
Step 2: Connect to ducts
□
Turn off air-handler
and remove all filters.
□
Attach Flex Duct to
register.
□
Install Range Plug 74 to start,
as most systems can be tested
on this Range Configuration.
3 7 11 18
29 47 74
□
Tap on the gauge and select
the range to match your fan, whenever
a Range Plug is changed.
Prepare the gauge
Use smaller Range number for tighter ducts, and
larger number for leakier ducts.