Retrotec DucTester 200 series with DM32 - Manual (Page 6)

Page 6 of 8
To measure the air leakage from the
duct system to outdoors requires both a
DucTester and a Blower Door system.
The Door Fan depressurizes the house
and the DucTester depressurizes the
ducts so leakage from the duct system
back into the conditioned space of the
home is neutralized.
Method #1:
Method #2:
□
Connect the red T-connected tubes to red ports
and all other tubes per diagram.
□
Tap [Set Pressure] [25] [Enter] on DucTester
gauge then on Door Fan gauge.
□
Tap [@ Pressure] on DucTester gauge to display
the results “@25Pa”.
□
When “-25 Pa” +/– 1 is achieved on both gauges,
record duct leakage to outdoors from the DucTester
gauge.
□
Connect tubes to gauges per diagram.
□
With DucTester off,
□
Set the Door Fan gauge to -25 Pa
by tapping [Set Pressure] [25] [Enter].
□
Set the DucTester to “0 Pa” by tapping
[Set Pressure] [0] [Enter].
□
When “0 Pa” +/– 1 is achieved, record
duct leakage to outdoors from DucTester gauge.
Method 1 uses the DucTester set up the
same was as for the Total Duct Leakage
test, and allows use of the [@ Pressure] to
increase accuracy.
Results are easier to visualize since both
the duct and house pressures can be seen.
Method 2 does not require connecting a
red tube to the DucTester gauge, but
[@ Pressure] cannot be used while setting
to 0 pressure.
DucTester at 0 Pa, Door Fan at -25 Pa
**
Both gauges at -25 Pa **
Door Fan gauge DucTester gauge
Optional Test
Duct Leakage to Outdoors: Depressurize
Options
**
If 50 Pa test pressure required, use 50 in all instructions.
Method# 1