Retrotec DucTester with DM-2 Manual de usuario descargar pdf (Pagina 7)

□ Connect Flex Duct to fan exhaust.

□ Check that tubing is connected the same as for

depressurize test (step 3).

□ Conduct test (step 4).

Duct Leakage to Outdoors:

Pressurize

Follow depressurize test method (page 6) except both

fan directions are reversed.

Page 7 of 8

Total Duct Leakage: Pressurize

Optional Test

Pressurizing can blow the Grill Mask off the registers!

Options

pressurize

Inlet

airow

Exhaust

□ Pass the Flange through the 10 inch hole in the

Flow Hood and tape it inside.

□ Attach the Flex Duct.

□ Secure the Flow Hood over the register

To measure Duct leakage:

□ Connect the Flex Duct to the fan and test as usual.

To measure HVAC System Flow:

□ For measuring supply ows, attach the Flex Duct

to the inlet (suction) side of the fan.

□ For measuring return ows, attach the Flex Duct

to the exhaust (discharge) side of the fan.

□ Connect the umbilical to the DucTester.

□ Attach the blue tube to the Flow Hood and gauge.

□ Press [@ Pressure] until “@” is removed from

display

□ Press [Mode] to select “Flow”

When a denite pressure appears on “PrA”:

□ Adjust the speed until “PrA” reads a pressure of 0 Pa.

□ Press [Set Pressure] [0] to have the DucTester

automatically achieve a 0 pressure.

□ Read the HVAC system ow result directly from

the gauge

Using the optional Flow Hood

Connect it quickly to ceiling level returns to measure

duct leakage or use it with your DucTester as a Pow-

ered Flow Hood to accurately measure HVAC system

ow rates.

Flow Hood

blue tube

1 2 3 4 5 6 7 8

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Retrotec DucTester with DM-2 Manual de usuario Pagina 7

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