Swegon COMPACT Unit - To Ensure the Correct Leakage Direction

GB.COMPACTUT.170622
Registered design. The company reserves the right to make design changes without prior notice.
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Pressure measurement tappings – leakage direction
- (blue)
+ (White)
COMPACT Unit
(Unit shown in the
right-hand version)
COMPACT Top
EXTRACT AIR
4.3.2 To Ensure the Correct Leakage Direction
The pressure balance in the unit is adjusted by means of a
adjustment plate mounted in the extract air inlet.
IMPORTANT! If you change COMPACT Unit to the left-
hand version, you must move the pressure adjusting plate
(must always be situated in the extract air inlet).
Connect a pressure gauge to the pressure measurement
tappings of the unit. The COMPACT Unit has four pressure
measurement tappings. Use the two tappings nearest the
extract air duct! See illustration. The COMPACT Top has
two pressure measurement tappings. See illustration. The
blue pressure measurement tapping is used for measur-
ing the negative pressure in the extract air section and the
white pressure measurement tapping is used for measur-
ing the negative pressure in the supply air section.
Note that both pressure measurement tappings are used
for measuring negative pressure.
MEASURED VALUES
The negative pressure in the extract air section should be
greater or the same as the negative pressure in the supply
air section.
If the negative pressure in the extract air section is the
same or up to 20 Pa greater than the negative pressure
in the supply air section, then you’ve finished this adjust-
ment.
DEVIATIONS
If the negative pressure in the extract air section is less
than that in the supply air section, the adjustment plate
must be readjusted as follows:
1. Stop the air handling unit, open the inspection door
and slightly close the adjustment plate in the air han-
dling unit’s extract air inlet.
3. Close the inspection door and restart the unit.
4. Measure the pressures.
Repeat this procedure until the negative pressure in
the extract air section is the just as high or up to 20 Pa
higher than the negative pressure in the supply air sec-
tion (0–20 Pa).
5. If the negative pressure in the extract air section is
higher than 20 Pa compared to the supply air section,
although the adjustment plate is completely open, the
leakage and purging air flow will be more than antici-
pated. This means that the actual extract air flow will
deviate from the preset extract airflow. The deviation
increases as the pressure differential increases.
- (blue)
+ (White)