2
3. Storage
The ACN-ARN smoke fans can stand
outdoor storage for 1 month provided
the packing is intact. Fans with no or bro-
ken packing must be stored in sheltered
locations.
If the fans are stored indoors under well-
ventilated conditions with no risk of con-
densation the storage period may be ex-
tended to 6 months. The storage place
must not be exposed to vibrations likely
to damage the motor bearings.
If the storage period exceeds 3 months, it
is recommended to turn the rotor re-
gularly by hand.
4. Installation
4.1 Preparing for installation
Follow the directions below to ensure a
safe work environment and fan function-
ality.
Checklist prior to installation
• The rotor must rotate freely in the
casing and have equal blade tip
distances to the casing around the
circumference.
• For outdoor installations the fans
must be sheltered. Fans, motors and
frequency drives must be installed
so they are not exposed to rain or
dripping water.
• Avoid static electricity by
grounding the fan during
installation. For instance by
assembly on non-conducting
vibration dampers and
foundations.
4.2 Installation
Fans must always be installed so that the
rotating parts cannot be touched. The fan
must be provided with wire guards on
the inlet and outlet sides. If ducts are con-
nected, they should be provided with
wire guards on the inlet side.
The fan is provided with an arrow-plate
denoting the direction of airflow
through the fan casing. See during instal-
lation that the fan is oriented so as to pro-
vide the desired direction of airflow in
the system.
The best way of installing the fan is with
a support frame (optional accessory), but
it may also be suspended in the fan cas-
ing flanges or in special carriers.
The carriers must not hamper the free in-
let and outlet of air.
Important:
The vibration level of the
installation depends on
how the fans are installed,
the operational
conditions and the
natural frequency of the
foundation and supports.
Follow the below
guidelines to avoid
resonance.
- Soft suspension:
Fan is
fixated through springs
or dampers. The natural
frequency (Hz) of the
system should be at least
20% below fan speed.
Soft suspensions are
available from Novenco.
- Stiff suspension:
Fan is
fastened to a duct or a
stiff wall through holes
in the flanges. The
natural frequency of this
system should be at least
20% above fan speed.
- Elastic structure:
Fan is
fastened to an elastic
structure. The natural
system frequency
should be at least 20%
higher or lower than fan
speed.
The owner is responsible
for compliance with the
above requirements. Non-
compliance affects the
product guarantee.
Figure 1. Mounting of wire guard
(optional accessory) in flanged outlet
20
Ø400 - Ø560:
Ø630 - Ø1000:
Ø1120 - Ø1600:
6 x Ø7 mm
8 x Ø7 mm
8 x Ø9 mm
Eyebolt
Nut
Figure 2. Assembly of horizontal support frame for ACN-ARN
Figure 3. ACN mounted on horizontal support frame with anti-vibration dampers
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