Protection Against Accidental Contact; Air Flow Direction And Direction Of Rotation; Speed Control; Condensation Water Formation - Helios RR EC Serie Notice De Montage Et D'installation

Installation and Operating Instructions
UK
WARNING
WARNING
ATTENTION
WARNING
NOTE
EC-Centrifugal 'In-line' Duct Fans – RR EC ...

2.10 Protection against accidental contact

When installing observe the valid regulations (DIN EN ISO 13857) for labour protection and accidental pre-
vention.
Any contact with rotating parts must be avoided. Make sure that no textiles or other materials which could be sucked
in (such as clothing of persons) are close to the suction area of the fan.
Fans protected by their installation (in ventilation ducts or closed aggregate) do not need a protection grille, if the instal
lation guarantees the same protection. We emphasize that the installer will be held responsible for accidents occuring
as a result of missing protection devices.

2.11 Air flow direction and direction of rotation

The fans have a fixed direction of rotation, i.e. they are not reversible. The direction is indicated by arrows (direction of
rotation in red, air flow direction in blue). The air flow direction is definable by the installation.

2.12 Speed control

All units of this series are steplessly controllable by means of a 0-10 V control voltage. Suitable potentiometers (type
PU/A 10) and speed regulation with universal control system (type EUR EC) are offered in the accessories program.
The use of other brands, especially other electronic devices, can lead to malfunctioning and even destruc-
tion of controller and/or fan. Controllers which have not been cleared by Helios are not liable for warranty and
guarantee claims.

2.13 Condensation water formation

In case of periodial use, moist and warm media and through temperature variations (intermittent service) condensate-
may build up in the motor and its draining off must be ensured. Further measures like drain traps/drainage are highly
recommended. Under no circumstances must the motor come into contact with condensation water.

2.14 Motor protection

All fans have thermal contacts fitted which protect the EC-motor against thermal overload. If the thermal contact trips
this is a sign that a possible fault has occurred. This must be investigated and any fault corrected.
If the motor switches off repeated via thermal contact, urgent investigations to find the cause should be car-
ried out by suitably qualified.

2.15 Putting into operation

The following checks are to be carried out:
- Check for operation according to the intended purpose of the fan.
- Compare power supply voltage with data on the rating plate.
- Check if fan is securely mounted.
- Check all parts especially screws, nuts and safety guards for tight fit.
- Check freewheeling of moving parts.
- Compare current consumption with data on the rating plate.
- Check earth connection.
- Check sealing of connection cable and clamping of the cable wires.
- Start operation only if protection against accidental contact is guaranteed.
2.16 Sound levels
The sound levels published in the catalogue can differ considerably after installation as sound pressure levels depend
on the absorption capacity on the room, the place of installation and other factors.
Sound reduction is possible by using attenuators and by speed controllers.

2.17 Maintenance

All work must be carried out with the equipment fully isolated from the power supply.
Excessive deposits of dirt, dust, grease and other materials on impeller, motor and protection grille especially between
casing and impeller are to be avoided and have to be prevented by periodical cleaning. Also make sure that the con
densation pores are unclogged. The motors have maintenance free, long-lasting greased ball bearings. After 2 years of
storage or standstill the motors are to be replaced.
If the fan is used for important functions, servicing is necessary at least every six months. In case of standstill for a lon-
ger period it must be serviced before starting the operation.Furthermore the device should be put for min. 2 hours into
operation for so that penetrated condensate can evaporate and the ball bearings are moved.
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