Retrotec Blower Door with DM32 - Manual (Page 2)

Make sure the device shown on the Home
screen matches your fan. To change device, tap
the fan picture, then the [Change Device] key.
Select your device from the pictures, then
choose the Range.
Use Range Ring B for most houses, try “C8” for tighter
new houses, or “A” for leakier older houses.
For 300 fans, start with Open Range.
Tap on [Channel B] to change the type of result
or units. Check the Door Fan Operation Manual
to see the results required for your region.
Tap [Settings] then [Time averaging] to adjust
the time averaging. 5 seconds is OK for a calm
day. 10 or 30 seconds can be used on windy
days.
Tap [Settings] then .
Make sure the [Default @ Pressure] is set to
50 Pa.
Make sure “n” value is set to 0.65 for House.
Tap to return to the Home screen.
Step 4: Desired results not achieved?
Cannot achieve test pressure at full speed?
If fan reaches 100% speed before reaching 50 Pa:
□
Check to see if all doors and windows are closed.
□
Remove a Range Ring and try again.
□
Change [Range] on the gauge to match.
□
Re-adjust fan speed.
□
Tap [@ Pressure] to get the gauge to calculate
what the flow would be at exactly 50 Pa.
Flow reads “--” at test pressure?
If the test pressure has been reached, but “--” appears, the fan
is running too slowly to accurately measure flow.
□
Add the next lower Range
□
Change [Range] to match
Gauge set up
□
Press [On] to power up the gauge.
□
Tap [Settings] then [Baseline].
□
Tap [Capture Baseline] and 20 seconds on a calm day or
60 seconds on a windy day, then tap [End Capture] then
[On] to return to the Home screen.
□
Uncover fan. Install Range Ring B (Open for 300 fan).
□
Make sure gauge shows the correct Range on Home screen.
Step 3: Conduct depressurization
test, (CFM@50)
□
Disconnect Speed Control Cable, then adjust Speed
Control knob until pressure is about 50 Pa.
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□
Tap [@ Pressure] to extrapolate results to exactly 50 Pa.
□
Record results.
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