EXC
a
Installation – Commissioning – Maintenance
20170705
Accessories
Mounting frame, EXCT 2
Mounting frame with rubber seal-fitted spigot connection.
Mounting frame EXCT 3
Mounting frame with insertion joint dimensions for con-
nection to spigots. The mounting frame has a larger inner
diameter than the connecting duct component fitted with
a spigot, e.g. a duct bend.
Installation
Size of opening, see the dimension of the connecting
duct. The mounting frame should be inserted into the
connecting duct and fixed in position with blind rivets
from the inside. Be careful when positioning the blind
rivets so that they will not impede attaching the air dif-
fuser in the mounting frame. Rotate the diffuser into the
bayonet mount of the mounting frame. See Figure 1.
Commissioning
Rotate the inner cone clockwise (-) to increase the pres-
sure drop and counterclockwise (+) to decrease it. Lock
the position of the cone by tightening the lock nut on
the rear side of the diffuser.
The air diffuser can be commissioned by measuring the
pressure or the airflow. For pressure measurement, use a so-
called "measuring hook" and for airflow measurement use a
commonly marketed airflow meter. See Figures 2 and 3.
The rated coefficient of performance (K-factor) is speci-
fied on the identification label of the product and in the
relevant commissioning instructions at www.swegon.com.
Maintenance
The air diffuser can be cleaned, if necessary, using luke-
warm water with dishwashing detergent added or by
vacuum cleaning using a brush nozzle. The duct system
can be reached for cleaning after the air diffuser has been
rotated out of its mounting frame.
Figure 3. Commissioning.
q
= flow reading l/s
p
= current pressure reading (Pa)
k
= commissioning factor
k-factor
p
k
p
q
⋅
=
k
p
q
=
( )
2
EXC 125
Tomelilla
Sweden
-10 -5 0 +5 +10
k = 1,3 1,9 2,6 3,2 3,9
k
q
Figure 1. Installation.
Figure 2. Commissioning.
