2
Lifting and transport must be done with
care, as the fans are vulnerable to vibra-
tions and shocks which can result in im-
balance and deformations. Check the
blade clearance and fan before continu-
ing with installation.
Further transport of the fan is done with
the front flange placed down.
3. Storage
Axial flow fans type ACN-ACW-ARN
can stand outdoor storage for 1 month
provided the packing is intact. Fans with
no packing must be stored in a sheltered
place.
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 impeller reg-
ularly by hand.
4. Installation
4.1 Prior to attachment
Prior to attachment make sure that the
impeller rotates freely in the fan casing,
wherever possible with equal distance
between blade tip and fan casing
throughout the circumference.
4.2 Attachment
The fan is provided with an arrow-plate
denoting the direction of air flow
through the fan casing. See during instal-
lation that the fan is oriented so as to pro-
vide the desired direction of air flow in
the system.
The best way of installing the fan is using
mounting feet (available as optional ex-
tras), but it may also be suspended in the
fan casing flanges or in special carriers.
The carriers must not hamper the free in-
let and outlet of air.
When the fan has been finally secured
make sure that the impeller rotates freely
in the casing.
If the motor is provided with drain holes
for condensed water the fan must be ori-
ented so that the holes turn downwards
(lowest point).
Generally, it is of the utmost importance
for the performance and sound level of
an axial flow fan that the air flow is un-
impeded and free from eddies.
4.3 Mounting feet or plate
Mounting feet for types ACN/ACW/
ARN consist of two mounting plates (see
fig. 5 item 01).
Mount two stiffeners (item 02) between
these by means of joining elements (item
03). Stiffeners are only available from fan
size 630 mm inclusive.
To prevent vibrations spreading from the
fan to the surroundings, anti-vibration
mountings may be inserted between fan
and support and flexible connections fit-
ted in the ducts before and after the fan
(available as optional extras).
Secure anti-vibration mountings (fig. 6
item 06) in the mounting feet by means of
bolts (item 05).
Mount base plates (item 07) for attach-
ment in the foundation/floor at the bot-
tom of the rubber element.
The natural frequency of the support
must differ at least 20% from the fan
speed.
The anti-vibration mountings serve to
ensure that the natural frequency of the
system does not exceed 10 Hz and that
the damping is at least 80% at 1500 r.p.m.
Fig. 5 Mounting foot for type ACN
Fig. 6. ACN with mounting foot and anti-vi-
bration mountings
Fig. 6b. ACN with mounting plate
Figure 3. Total weights for type ACW fans with 10 mm thickness of plate in tubes (incl. motor)
Fan
size
Motor size
-71
-80
-90
-100
-112
-132
-160
-180
-200
-225
-250
-280
Hu
b diamet
er
s
160
, 230,
280,
330 and 380
ACW 250
ACW 315
50.5
54
ACW 400
74.5
78
84
91.5
ACW 500
102.5
106
112
119.5
123
144
ACW 560
129.5
133
139
146.5
150
171
210
ACW 630
143.5
147
153
160.5
164
185
224
282
ACW 710
178.5
182
188
195.5
199
220
259
317
ACW 800
201.5
205
211
218.5
222
243
282
340
ACW 900
245.5
249
255
262.5
266
287
326
384
ACW 1000
294
301.5
305
326
365
423
H
u
b di
a
m
eters
403
and
57
8
ACW 900
304
378
436
ACW 1000
341
417
475
518
ACW 1120
392
453
492
550
592
671
ACW 1250
464
528
568
626
668
747
786
ACW 1400
553
667
725
767
846
885
1114
ACW 1600
861
940
980
1209
Figure 4. Date for 4-pole motors
Motor
type
-71
-80
-90
-100
-112
-132
-160
-180
-200
-225
-250
-280
Motor
weight kg
6.5 10 16 23.5 27 48 87 145 190 270 305 535
