Operating instructions

25
To ensure your own security it is absolutely
necessary that the following instructions are
thoroughly read and observed.
Receipt and storage
Check consignment immediately upon receipt
for damages; in case of damage immediately
arrange for statement of damage in consultation
with the forwarding agent.
When storing for a longer period of time the
following steps are to be taken to avoid
damaging influences: sealing of bare parts with
anti-corrosion agent; protection of motor by dry,
air- and dustproof packing (plastic bags with
drying agent and moisture indicators). The
storage place must be water proof, vibration-
free and free of temperature variations.
When storing for several years or standstill of
motor an inspection of the bearings with
possible re-lubrication and an insulation
inspection are absolutely necessary before
starting operation.
When falling below an insulation resistance of 2
M Ohm at 500 V direct voltage and 25 °C
winding temperature the motor has to be dried
at a maximum temperature of 80 °C and the in-
spection then repeated.
When transshipping (especially over longer
distances) check if the packing is adequate for
way and manner of transportation.
Damages due to improper transportation,
storage or putting into operation are detectable
and are not liable for warranty.
Operation/Use
The fans are suitable for moving normal or
slightly dusty, almost non-agressive and slightly
humid air at normal temperatures and in the
range of their performance characteristic curve.
For use in explosive areas special execution is
required. For operation under difficult conditions
i.e. high humidity, longer period of standstill,
high pollution, excessive working conditions
through climatic, technical or electronic
influences, further inquiry and operation release
is necessary as the standard execution might
not be suitable.
The motors have tropical insulation. The
insulation class, the thermal load possible and
also the protection class are noted on the rating
plate. It must be ensured that the standardized
range of application is not exceeded.
The standard execution is suitable for operation
in ambient temperatures of – 35 °C to + 40 °C.
The fan may only be used according to its
intended purpose. The fan may not be used
outdoors and may not come in contact with
water during operation. Outdoor use is possible
in a corresponding special execution.
Operation as room ventilation device
In order to achieve the desired fan performance
a systematic air supply is imperative. When
using chimney dependant fire-places in
ventilated rooms these must have enough
supply air no matter which operation conditions.
Performance data
The motor rating plate provides information on
the electrical data; this data is to be examined
for its conformity to the local conditions.
The fan performances were determined on a
test stand according to DIN 24163, part 2; they
are valid for the rated speed and standard
execution by use of a coned inlet, without
protection grille at free suction and discharge.
“condensation water development” is to be
observed. In order to avoid distortion of the
fan-housing and also a brushing of the impeller
an even mounting surface must be given. If
necessary this must be achieved by balancing.
Installation
When installing heed to obviate body sound
transmission, e.g. by using flexible connectors
when installing in ducts (see accessories). When
installing in concrete and light weight
constructed walls and wood panels avoid
tightening the fixing screws too tightly. To
prevent loosening secure screws accordingly.
When installing in ducts make sure that there is
a sufficiently long, straight piece of duct in front
and behind the fan as otherwise considerable
performance reduction and noise increase will
result. When installing in walls and later rough-
casting the housing can be wrapped in plastic
foil so that it is easily removable.
Attention: The max. fan performance can only
be achieved if unhindered suction and
discharge is provided. For a sufficient cooling of
the motor a minimum air-flow area of 20% of the
fan cross section must be guaranteed.
Condensation water development
In case of periodical use, moist and warm me-
dia and through temperature variations (intermit-
tent service), condensate is built up in the motor
and its draining off must be ensured.
Motor housing and terminal box lid (on the
backside of the motor), are serially supplied with
one condensate opening each (except in E Exe
executions). The opening in the terminal box lid
is closed by a yellow plastic plug. The opening
at the front of the motor housing is open.
When installed at a horizontal axle position the
fan must be turned until the condensation water
opening shows downwards. When installed at a
vertical axle position with the impeller pointing
upwards the plug in the terminal box must be
removed and then the motor housing must be
closed. The condensation water opening must
always be the lowest point.
In case of damage through incorrect installation
Helios is released from all guarantee claims.
Security of operation – emergency
operation
When using the fan in important functions it
must be installed so that in case of a fan
breakdown an emergency operation is
guaranteed. Suitable solutions are: parallel
operation of 2 devices of lower performance
with separated current supply, standby fan,
alarm and emergency ventilation systems.
Electrical connection
Electrical connection may only be carried out by
specially trained personnel.
Attention: All work only in dead state. All
relevant security and installation regulations are
to be observed. Peremptory regulations are:
– an all-pole mains switch with a minimum
contact opening of 3 mm and
– a suitable protection device for each fan
resp. each speed (for fans with more than
one speed).
Power-supply voltage and frequency must
correspond to the data on the motor rating
plate.
When connecting to plastic terminal boxes no
metal screw-type conduit fittings may be used.
General installation, operating and maintenance instructions
Diverging execution and adverse installation-
and operation conditions can lead to a
reduction of performance.
The noise data also refers to the above
mentioned configuration. Variations in housing,
adverse operating conditions etc. can lead to an
increase of the given data. Data which applies
to certain distances (1, 2 and 4 m) is valid for
free field conditions.
At installation the sound pressure level can differ
considerably from the catalogue given data, as
it depends extremely on the installation
conditions, i.e. on the sound-absorption
capacity of the room, its size and other factors.
Protection against accidental contact
When installing observe the valid regulations for
labour protection and accident prevention.
Any contact with rotating parts must be
avoided. Make sure that no textiles (such as
curtains) or other materials which could be
sucked in, as for instance clothing are close to
the suction area of the fan.
Certain fans are delivered serially with a
protection grille on the suction side (DIN EN
294). Depending on the installation conditions a
contact safety device on the discharge side may
be necessary. Corresponding grilles are
available as accessories.
Fans protected by their installation in ventilation
channels or closed aggregates do not need a
protection grille, if the installation guarantees the
same protection (see DIN EN 294, DIN EN 394).
We emphasize that the installer will be held
responsible for accidents occuring as a result of
missing protection devices.
Air-flow direction and direction of
rotation
The air-flow direction is blowing across the
motor (execution “B”). The correct direction of
rotation for this is – when seeing the impeller
from the front side – counterclockwise rotation.
When connecting rotary current fan types
exchange 2 phases for counterclockwise
rotation. Attention: Wrong direction of rotation
can lead to overheating of the motor.
Speed control
As far as stated in the catalogue the fans are
speed controllable, either by voltage reduction
or frequency inverters. Types not released for
regulation may not be speed controlled.
In order to ensure sufficient cooling of the motor
and maintenance of functioning a minimum
speed/voltage also depending on the pressure
losses in the building, of the ventilation system,
wind pressure etc. must be kept.
When deciding on a controller please note that
current maximum peaks may occur within the
controlled electric field. The controllers must be
dimensioned according to our technical data.
Suitable controllers are available as accessories.
Attention: The use of other brands, especially
other electronic devices, can lead to
malfunctioning and even distruction of the
controller and/or the fan. Controllers which
haven’t been cleared by Helios are not liable for
warranty and guarantee claims.
Mounting
The fans are delivered in standard execution as
a complete unit, i.e. ready for installation.
Installation is possible in every axle position.
Attention: Following instructions