EXF
a
Installation - Commissioning - Maintenance
20220217
Accessories
Mounting frame, EXFT1
Mounting frame for insertion mounting.
Mounting frame EXFT5
Mounting frame for fit-on mounting.
Assembly
Size of opening, see the dimensions of the connecting
duct. Install the mounting frame by inserting its nipple
into the connecting duct. Press the spring fasteners of the
extract air valve into the grooves of the mounting frame
as shown in Figure 1.
Commissioning
Rotate the inner cone clockwise (-) to increase the
pressure drop and counterclockwise (+) to decrease it.
Lock the position of the cone by tightening the lock nut
on the rear side of the extract air valve.
The extract air valve can be commissioned by measuring
the pressure or the air flow. For pressure measurement,
use a so-called "measuring hook" (probe) and for air flow
measurement use a commonly marketed airflow meter.
See Figures 2 and 3.
The rated coefficient of performance (K-factor) is specified
on the identification label of the product and in the
relevant commissioning instructions at www.swegon.com.
Maintenance
The extract air valve can be cleaned, if necessary, using
lukewarm water with dishwashing detergent added or by
vacuum cleaning using a brush nozzle. The duct system
can be reached for cleaning by withdrawing the extract
air valve out of its mounting frame.
Figure 1. Installation.
Figure 3. Commissioning.
p
k
p
q
⋅
=
k
p
q
=
( )
2
EXF 125
Tomelilla
Sweden
-10 -5 0 +5 +10
k = 2,2 3,0 3,8 4,9 5,6
k
q
q
= measured flow l/s
p
= current pressure reading (Pa)
k
= commissioning factor
k-factor
Figure 2. Commissioning.
