6
stationary radial fan
WPA
-
14
-
S
-
N
04.06.2019
Fig. No.3
– Flow chart – Stationary radial fan type WPA-14-S-N
5.
Structure and Function
The fan consists of a steel spiral housing,
motor and an aluminium radial impeller
which is di-
rectly mounted at the motor pivot
(direct drive)
.
Impeller with radial blades provides low acous-
tic pressure level of the fan.
The appliance is mounted on a stand which is placed on vibro-absorbing base frame (see
Fig
.
No.1). The vibro-absorbing frame damps the vibrations of the fan and their transmission onto
the building structure. Vibro-absorbers are selected adequately to the total weight of the set:
“fan + stand + frame”.
The fan inlet is equipped with a flange, whereas, the fan outlet is ended
with a round connec-
tion fitting
piece, to provide
a
safe fastening to
the
spiral-seam duct
(rigid conduit)
,
or for flexible
couplings.
For safety reasons,
the inlet and outlet are equipped with protective grills.
It recommended to
install
TK
silencers
at
the fan inlet and outlet
(for details see
acoustic
performances
in
the Table
No
.1). All the subsequent parts of the fan should be assembled together.
ADDITIONAL EQUIPMENT
– delivery on separate order
:
■
motor protective switches ZE
■
safety switches (isolating switches)
■
silencers
6.
Assembly and Start-up
The
appliance is designed for function inside
the
industrial
rooms
(
indoor application
)
. The sta-
tionary fan WPA-14-S-N fan is delivered in a assembled state.
The
vibro-absorbing frame has
to be fastened to the floor in a target place of use.