2
Lifting and transport must be done with
care, as the fans are vulnerable to
vibrations and shocks. These can result in
imbalance and deformations. Check the
blade clearance, fan casing and flanges
before installation.
Lift fans preferably in three points. Fit an
eyebolt on top of the motor, if the motor
orientation allows, or put a strap around
the motor, and use two flange holes.
An eyebolt is not included in the Novenco
delivery.
Large fans have lifting eyes on the back of
the inlet cone. For these fans it is enough to
lift in two points. Otherwise, follow the
above procedure for lifting in three points.
3. Storage
Axial flow fans type ACP and ACG can
stand outdoor storage for one 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 without risk of
condensation the storage period may be
extended to six months.
The storage space must not be exposed to
vibrations likely to damage the motor
bearings. If the storage period exceeds
three months, the impeller must be turned
regularly by hand.
4. Installation
NovAx axial flow fans types ACP and ACG
are designed for operation in both
horizontal and vertical position. (Know-
ledge of installation position is required
before drilling of drain holes).
ACP is for free inlet and without
connection to duct on the pressure side.
ACG is for free inlet and connection to duct
on the pressure side. The ACG is fitted with
a downstream guide vane arrangement.
4.1 Prior to installation
Prior to installation make sure that the
impeller rotates freely in the fan casing. The
mean blade clearance, which is the distance
between the blade tip and the fan casing,
must be equal to or larger than the
minimum value.
Calculate the mean clearance in
millimetres by finding the maximum
value, adding the values from three points
at 90° offsets, and dividing by four.
Adjust the motor position in the
suspension arrangement until it meets the
minimum allowable blade clearance.
4.2 Installation
The fan is provided with an arrow-plate
denoting the direction of airflow through
the fan casing. See during installation that
the fan is oriented so as to provide the
desired direction of airflow in the system.
The best way of installing the fan is using
mounting feet (available as optional extras,
fig. 3), but it may also be suspended in the
fan casing flanges or in special carriers.
The carriers must not hamper the free inlet
and outlet flow of the air.
When the fan has been finally secured
make sure that the impeller rotates freely in
the casing.
.
4.3 Mounting feet
Mounting feet for types ACP and ACG
consist of two mounting plates (fig. 3, items
01 and 02). Mount two c-profiles (item 03)
under these by means of bolts (item 05) and
nuts (item 04).
The distance between the end of the c-
profile and mounting plates is determined
by type/size and motor size.
Mount the fan casing in the two flange
holes of the mounting plates and mount the
distance bush (fig. 4, item 07) by means of
joining elements (items 08 and 09) between
inlet cone and mounting plate (item 06).
The fan houses for ACP and ACG sizes
1250 – 1600 have circular fan casings.
Therefore, the fan casing is mounted with
fittings for mounting foot (fig. 5, item 07A)
and joining elements (fig. 5, items 08A and
09A).
Mount the fittings on the back of the
mounting foot and fan casing as shown on
fig. 5.
To prevent spreading of vibrations from the
Figure 1.
Lift fans in preferable three
points
Fan size
Min.
clearance
[mm]
Fan size
Min.
clearance
[mm]
250
0.3
800
0.8
315
0.3
900
0.9
400
0.4
1000
1.0
500
0.5
1120
1.1
560
0.6
1250
1.3
630
0.6
1400
1.4
710
0.7
1600
1.6
Table 4.
Minimum allowable blade clearance
Figure 2.
Calculation of mean clearance
Mean clearance
Max.
P1
P2
P3
+
+
+
4
---------------------------------------------------
=
90°
90°
90°
Point 1
Point 3
Point 2
Min.
Ma
x.
Figure 3.
Mounting foot for type ACP
(optional)
Figure 4.
Mounting foot for types ACP
and ACG 250-1120 (optional)
