Recommended Tightening Torque For Mounting Screws; Functional Safety - Emergency Operation; Electrical Connection; Putting Into Operation - Helios HRF 250 Ex Série Notice De Montage Et D'utilisation

Installation and Operating Instructions
EN
m
WARNING
HRF..  – Axial high-performance fans
3.5

Recommended tightening torque for mounting screws

The following tightening torques for connection of mounting nuts and screws (grade 8.8) are to be used:
The impeller mounting on the motor shaft is secured at the factory with liquid thread lock against loosening.
Screw size
3.6

Functional safety - Emergency operation

When using the fan in important technical supply function it must be be installed in such a way that with fan failure
automatically an emergency operation is guaranteed. Suitable solutions are e.g.: Parallel operation of two less powerful
with units with a separate electric cuircuit, standby fan, alarm and emergency ventilation systems.
3.7

Electrical connection

Before any maintenance or installation work or before opening the terminal compartment, the device is to
be fully isolated from the power supply and secured against unintended restart!
– The regulations to avoid danger of ignition due to electrostatic discharges (TRGS 727) must be implemented.
– The electrical connection must be carried out only by a qualified electrician in accordance with the data in
the terminal box and enclosed wiring diagrams!
– The relevant standards and safety regulations (eg DIN VDE 0100) are strictly to be observed.
– An all-pole mains switch / isolator switch with at least 3 mm contact opening (VDE 0700 T1 7.12.2 / EN 60335-1)
is mandatory.
– Every motor must have a motor protection device of category II (2) G, see Directive 2014/34/EU (Equipment
Safety Act), which is to be adjusted to the rated current of the motor and which trips within the given time t E on the
motor type plate provided the motor is blocked. The function is to be tested on the basis of the tripping
characteristic line enclosed with the protection switch. Also observe the regulations especially enclosed with the
device.
– Electrical connection data must correspond to the data on the motor type plate.
– The installation of the power cable is to be carried out professionally! The introduction of the connecting cable into
the fan has to compensate the movement by anti vibration mounts. The connecting cable may not touch
sharp objects.
– For cable entries and connections only explosion-proof cable glands must be used!
– AC types are to be connected by interchanging two phases for counterclockwise rotation in the
clockwise rotating field.
– Security components, e.g. safety grille may not be dismantled, bypassed or disabled.
– Further operations see the following section „Putting into operation".
– Ground connections, including any supplementary equipotential bonding must be properly installed!
3.8

Putting into operation

The following checks are carried out before initial operation:
– check for operation according to the intended purpose of the fan
– compare power supply voltage with data on the rating plate
– check fan for solid fastening and professional electrical installation
– check all parts especially screws, nuts and safety grille for tight fit. Without loosing screws!
– test unhindered running of impeller respectively minimum air gap
– check if direction of rotation and air flow direction correspond. Check direction of rotation of impeller (by switching
on for a short time; when checking the direction of rotation wear protective goggles)
– compare current consumption with data on the rating plate
– test functioning of motor protection device
– test protective conductor connection
– check sealing of the connection cable and tight clamp of cable wires
– start operation only if a protection against accidental contact is guaranteed
– check tightness of all connections (if required)
– remove assembly residues from fan or duct
– during the test run check the fan on improper vibration and noise
– do not operate the fan beyond the specified performance curce (siehe catalogue / Internet),
the fan must run on its prescribed operating point
– fill out the enclosed commissioning report (see page 10) and submit in case of the warranty claim
3.9

Operation

Check regularly the correct function of the fan:
– unhindered running of impeller
– check the air gap (see table 3.2)
– measure current consumption
– check on possible vibrations and noise
– deposit of dust and dirt in the casing or on the motor and impeller
M8
M10
M12
M16
6
Tightening torque
20 Nm
35 Nm
60 Nm
150 Nm