2
fan capacity with respect to pressure, air
quantity, output and maximum speed
(rpm).
A motor nameplate with relevant motor
data, including enclosure class, is also
provided.
2.2 Weight
The total weights shown in figs 1 and 2
apply to axial flow fans, types ACP and
ACG Smoke.
The total weight is determined by the type/
size of fan and the maximum size of the
motor used, and is given in kg.
Fig. 3 shows the weights of the various
motors. The motors are LOHER fire gas
motors and the data shown, which are
applicable for both ACP and ACG Smoke,
are the maximum weights for four-pole
motors.
2.3 Transport
During transport, care must be taken to
prevent water, e.g. rainwater, from entering
the motor or other sensitive components.
NovAx smoke fans, types ACP and ACG
Smoke, are supplied on pallets or skids
which allow fork-lift transport. The forks
must be positioned beneath the base. The
unit must be set down as slowly as possible
on a soft surface. Impacts, vibrations and
falls may lead to imbalance and
deformation or other damage to motor
bearings.
3. Storage
NovAx smoke fans can withstand outdoor
storage for up to one month providing the
packaging is intact. After removing the
packaging, fans must be stored in a
rainproof shelter.
If stored indoors, fans must be kept under
well-ventilated conditions with no risk of
condensation. Under such conditions,
storage duration may be extended to six
months.
The storage place must not be exposed to
vibrations, which may damage the motor
bearings. If stored for longer than three
months, the impeller should be turned
regularly by hand.
4. Installation
4.1 Mounting
NovAx axial flow fans, types ACP and
ACG Smoke, are designed to operate in
either horizontal or vertical position (the
mounting position must be determined
before drain holes in the motor are drilled).
ACP Smoke has free inlet and non-ducted
outlet.
ACG Smoke has free inlet and ducted outlet
(outlet guide vane assembly).
4.2 Before installation
Before installation, ensure that the impeller
rotates freely in the fan housing, as far as
possible with equal distance between blade
tip and fan housing around the entire
circumference.
4.3 Installation
Fans must always be installed in such a way
as to prevent contact with rotating parts.
Free inlets and outlets must be guarded by
protective grilles. If ducts are connected,
these must be provided with protective
grilles on the side of the building.
The fan is provided with an arrow plate
denoting the direction of air flow through
the fan housing. During installation, ensure
that the fan is oriented so as to provide the
desired direction of air flow in the system.
The fan is best installed using special
mounts (available as optional extras, fig. 4),
but it may also be suspended by the
housing flanges or in special hangers.
Hangers must not impede the free intake
and discharge of air.
After securing the fan in position, check
that the impeller rotates freely in the
housing.
4.4 Mounts
Mounts for types ACP and ACG Smoke
consist of two mounting plates (fig. 4 pos.
01 and 02). Beneath these, two C-profiles
(pos. 03) must be fitted using bolts (pos. 05)
and nuts (pos. 04).
The distance between the ends of the C-
profiles and the mounting plates is
determined by the fan type/size and motor
size.
.
Mount the fan housing in the two flange
holes in the mounting plates and fit the
distance bush (fig. 5, pos. 07) by means of
joining elements (pos. 08 and 09) between
inlet cone and mounting plate (pos. 06).
ACP and ACG Smoke sizes 1250-1600 have
circular fan housing. The housing is
therefore installed using mount fittings (fig.
6 pos. 07A) and joining elements (fig. 6 pos.
08A and 09A).
The fittings must be attached to the back of
the mount and fan housing. See fig. 6.
To prevent vibrations spreading from the
fan to the surroundings, vibration dampers
may be fitted between fan and underlying
surface and flexible connectors may be
fitted to the ducts behind the fan (available
as optional extra).
Vibration dampers (fig. 5 pos. 10) should be
fitted on the C-profile ends using bolts (pos.
11).
Base plates (pos. 12) for attachment to the
foundation/floor should be fitted beneath
the rubber dampers.
The vibration frequency of the underlying
surface must differ at least 20% from the fan
speed.
If the motor is provided with condensation
drain holes, the fan must be oriented so that
the holes face downwards (are lowest).
It is of the utmost importance for the
performance and sound level of the axial
flow fan that the air flow is unimpeded and
free of eddies.
4.5 Duct connection
NovAx ACG Smoke axial flow fans are
Fig. 4. Mount for type ACP Smoke
Fig. 5. Mount for types ACP and ACG
Smoke 400-1120
Fig. 6. Mounts for types ACP and ACG
Smoke 1250-1600
