Nicotra RLO User manual

Montageanleitung DE
RLO
(Original)
Mounting Instructions EN
RLO
(Translation of the original)
MA_RLO 1.0 – 06/2014
RLO _0 RLO _1
Taperlock
Clamping-bush system
Fixed hub
Inlet nozzle with IMV

EN Mounting Instructions
RLO
EN-2/8
1. Revision index
Revision Date
MA_RLO 1.0 06/2014
2. Safety notes
RLO (Radial Laufrad Ohne Motor) (Radial Impeller Without a Motor) are not ready-to-
use products but are designed as components for air conditioning, aeration and
ventilation systems. The impellers with hub are prebalanced; the balancing status must
be checked on the whole unit. They may only be operated when they have been
installed according to their provisions and the safety level has been secured through
use of safety equipment according to DIN EN ISO 13857 (DIN EN ISO 12 100) or other
constructional safety measures.
These mounting instructions are an integral part of the product and should be put,
accessible, into safe keeping as such.
The impellers are only designed to transport air or mixtures similar to air. Use in
areas subject to explosions for transporting gas, mist, vapours or their mixtures is
not permitted. Transport of solids or solid matter content in the conveying media is
not permitted.
The permitted temperature range lies between -20°C and +60°C.
Only operate the impeller for its intended use and only up to the maximum
permitted operating rpm according to information provided on the impeller type
plate. Exceeding the max. permitted operating rpm leads to risky situations due to
the high centrifugal forces generated. The impeller can burst – danger to life!
The max. permitted operating data shown on the type plate apply for an air density
of ρ= 1.2 kg/m3.
One should ensure through rpm controlling by means of a frequency converter that
the max. permissible rpm is not exceeded through a malfunction of the frequency
converter.
Assembly must only be performed by skilled personnel while observing instructions
in the operating manual as well as valid regulations.
Before performing any work on the fan or on the motor, pull out the power plug for
the power supply; to replace the motor unclamp the cable on the motor terminal
box.
Protective equipment, which was removed for assembly work,
should be attached again immediately after assembly (and before connecting to the
electrical power source).
Mount impellers and accessories in such a way that their stability is achieved at all
times during operation.

Mounting Instructions EN
RLO
EN-3/8
3. Transport / Storage
Check the delivery for completeness and transport damage.
Radial impellers are usually delivered on Euro pallets and can be transported using
a fork low lift truck.
When transporting with hoisting equipment: Lay a lifting belt with an adequate load
carrying capacity around a impeller blade.
Only use a lifting belt which is suitable for carrying sharp-edged loads.
Avoids knocks and impacts.
Inform the freight forwarder if damage is found.
Store the impellers in a dry, dust and vibration free environment.
4. Impeller installation with
the Taperlock clamping sleeve hub
The impeller is connected by means of clamping sleeves with the end of the shaft of the
drive motor.
4.1 Installation
Picture 4-1:
Taperlock
clamping sleeve
1. Clean and degrease all blank surfaces (fitting surfaces for the clamping sleeves
and motor shaft or drive shaft).
2. Insert the clamping sleeve (1) into the hub (2) and bring the bores to the cover.
3. Lightly oil the threaded pins (3) and screw them in – not fully tightened yet.
4. Push the impeller with the clamping sleeve unloaded onto the shaft (for a
respective impeller weight with the aid of hoisting equipment), align in an axial
position and tighten down the threaded pins cross-wise and evenly. Observe the
tightening torque conforming to Table 4-1. Fill empty bores with grease to avoid
ingress of foreign bodies.
5. Check the tightening torque on the screw connection after a operating time of
about 1 hour using the required tightening torque.
When using open feather key grooves, first place the feather key in the middle in
the shaft groove. The feather key must take weight over its whole length.

EN Mounting Instructions
RLO
EN-4/8
Picture 4-2:
Position of the
feather key
Position of the feather key:
Correct: Wrong:
4.2 Disassembly
Picture 4-3:
Taperlock
clamping sleeve
1. Loosen all threaded pins (3) and completely remove one or two threaded pins
dependent on the sleeve size, lubricate and screw into the disassembly bores (4).
2. Tighten one or both threaded pins evenly until the clamping sleeve (1) is released
from the hub (2).
3. The impeller can be removed.
4.3 Technical data
Table 4-1:
Torque table
Sleeve size
1008 1108 1210 1610 1615 2012 2517 3020 3030 3525 3535 4030 4040 4535 4545 5040 5050
Screw tightening
torque (Nm) 5.6 5.6 20
20 20 30 50 90 90 115 115 170 170 190 190 270 270
5. Installation of an impeller for impellers with a fixed
hub
5.1 Installation
Picture 5-1:
Fixed hub

Mounting Instructions EN
RLO
EN-5/8
1. The impeller is connected by means of the fixed hub with the end of the shaft of the
drive motor.
2. Slightly grease all blank surfaces (end of the shaft, hub bore). Pull the impeller with
hub (1) onto the shaft shoulder (2) (transition fit). For an appropriate weight secure
the weight using hoisting equipment. Provide for axial shaft securing using a bolt 3),
washer (4) and lock washer (5). Observe the tightening torque conforming to Table
5-1.
5.2 Disassembly
1. Loosen the axial bolt and pull off the impeller with a hub using a suitable extraction
device.
2. For an appropriate weight secure the weight using hoisting equipment.
5.3 Technical data
Table 5-1:
Torque table
FK 8.8
M4 M5 M6 M8 M10 M12
Screw tightening torque (Nm)
2.8 5.5 9.5 23 45 79
6. Setting up equipment
Wear safety shoes and safety gloves when working!
Observe the safety instructions
Ensure there are adequate distances from the suction and the pressure side.
Performing one’s own changes / modifications on the product is not permitted. A
safety risk!
Disassembly or attachment of components to the impeller leads to annulment of the
warranty!
7. Operating conditions
Do not use the impeller in an explosive atmosphere – there is a hazard from spark
formation. Explosion hazard!
Exceeding the max. permitted operating rpm (see impeller type plate) is not
permitted See safety instructions.
For operation with a frequency converter ensure that there is no increase in the
resonance vibration from the function “Overmodulation“ on the frequency
converter. The overmodulation function must be switched off.
Avoid any dynamic stress on the impeller; no frequent load changes!

EN Mounting Instructions
RLO
EN-6/8
8. Initial start-up
Remove any assembly residues and foreign bodies from the area around the
impeller and the suction removal area.
Check the direction of rotation (the direction of the rotation arrow on the impeller
base disk).
During initial start-up the whole unit must be checked for mechanical vibrations.
Rebalancing must be undertaken if necessary.
Ensure quiet low vibration running.
Determine the resonance area of the whole unit. If the resonance area lies within
the operating area, adjust the frequency converter in such a way that the unit can
run through the resonance area quickly. Strong vibrations through rough running
(unbalance; overmodulation of the frequency converter) for example due to
transport damage, inappropriate handling or operation in the resonance area, can
lead to product failure.
9. Maintenance and upkeep
Depending on the area of use and the conveying medium, the impeller is subject to
natural wear. Sediments accumulating on the impeller can lead to unbalance and
therefore to damage (risk of a fatigue fracture).
Check the impeller, in particular welding seams, for possible crack formation.
Check the total unit regularly for mechanical vibrations. We recommend a maximum
oscillation speed in a radial direction on the bearings or on the bearing shield of the
motor of not more than 4.5 mm/s. If the permissible vibration values are exceeded,
it is essential to rebalance the whole rotating unit according to DIN ISO 1940-1.
During impeller assembly and reassembly the whole unit must be checked for
mechanical vibrations. Rebalancing must be undertaken if necessary.
10 Cleaning
Regular inspection, if necessary with cleaning, is necessary to avoid unbalance
through contamination.
Cleaning intervals are according to the degree of contamination of the impeller.
The complete product must be cleaned using a moist cloth.
One should not use aggressive, paint removing cleaning agents while cleaning.

Mounting Instructions EN
RLO
EN-7/8
11 Mounting the measuring nipple
Picture 11-1:
Mounting the
measuring
nipple
Put on the measuring nipple (2) from inside through the nozzle (1) and fasten in
place using a toothed washer (3) and an hexagonal nut (for ATEX made out of
copper) (4).
Tighten by hand, about 7.5 Nm.
Ensure that the key surface of the nut is parallel to the nozzle edge (picture on the
right).
12 Nozzle overlapping, gap sizes and clearances
Picture 12-1:
Nozzle
overlapping
The nozzle overlapping (ü) should be 0.5% to 2,5% of the inlet diameter (Ed).
Align the impeller (1) and nozzle (2) in such a way that the gap(s) is almost even all
the way around.
The clearance (a) should be at least 1.0% of the inlet diameter (Ed).

EN Mounting Instructions
RLO
EN-8/8
Nicotra Gebhardt GmbH
Gebhardtstrasse 19-25
74638 Waldenburg, Germany
Tel [phone]
Telefax [phone]
Email: [email protected]
www.nicotra-gebhardt.com