nekos MR28-B User manual

4420003 – Rev. 1710
MR28-B
INSTRUCTION MANUAL
TUBULAR GEARMOTOR FOR BLINDS – Ø28MM
Electrical feeding 24V
EN
2
nekos products have been manufactured in accordance with safety standards and conforms
to the stipulations of current standards in force.
When correctly assembled, installed and used according to the present instructions, they will
not generate any danger for persons, animals or items.
Symbols used in the manual
DANGER This indication draw the attention about potential dangers for
safety and health of peoples and animals.

INFORMATION This information give further suggestions.

ATTENTION This indication draw the attention about potential dangers for
the product itself.
WARNING This indication draw the attention about potential damages to
goods.
ENVIRONMENTAL
INSTRUCTION
Environmental indication draw the attention about potential
dangers for the environment.
Contents
1. Security rules ....................................................................................................................... 3
2. Construction and standards ................................................................................................. 4
3. Technical data ...................................................................................................................... 4
4. ID plate and marking data .................................................................................................... 5
5. Electricity supply .................................................................................................................. 5
5.1. Section choice of supply cables .................................................................................. 5
6. Assembly.............................................................................................................................. 6
6.1. Blind support tube and end cap .................................................................................. 6
6.2. Gear motor ................................................................................................................. 6
6.3. Assembly of the supports ........................................................................................... 7
6.4. Assembly of motorization ............................................................................................ 7
7. Electrical connections .......................................................................................................... 8
8. Luminous indications on led ................................................................................................. 8
9. Adjustment of the two stroke-ends ....................................................................................... 8
10. Troubleshooting ................................................................................................................... 9
11. Indications for correct assembly ..........................................................................................10
12. Environmental protection ....................................................................................................10
13. Warranty .............................................................................................................................10
14. Declaration of incorporation (for a partly completed machine) and EC Declaration of
Conformity ...........................................................................................................................11

3
1. Security rules
PLEASE
NOTE:
IMPORTANT
SAFETY
INSTRUCTIONS.
C
AREFULLY OBSERVE
ALL THE FOLLOWING INSTALLATION INSTRUCTIONS TO ENSURE PERSONAL SAFETY.
IMPROPER INSTALLATION CAN SERIOUSLY ENDANGER SAFETY. KEEP THESE
INSTRUCTIONS AFTER INSTALLATION.
MANDATORY RISK ANALYSIS AND PROTECTION MEASURES.
The Nekos electrical actuators comply with the Machinery Directive (2006/42/EC), Standard
IEC 60335-2-103 (Particular requirements for drives for gates, doors and windows) and
other directives and regulations indicated in the attached Declarations of Incorporation and
CE Conformity (at the end of the manual). According to the Machinery Directive, actuators
are “partly completed machinery” intended for incorporation into doors and windows. The
manufacturer/supplier of the window is required, with exclusive responsibility, to ensure the
compliance of the entire system with the applicable standards and to issue CE certification.
We strongly discourage any use of the actuators other than that specified and therefore, in
any case, the supplier of the complete system retains full liability.
For systems installed at a height of less than 2.5 m above floor level or other levels
accessible to users, the manufacturer/supplier of the window must conduct risk analysis
regarding potential harm (violent blows, crushing, wounds) caused to people by normal
use or possible malfunction or accidental breakage of the automated windows, and to
implement suitable protective measures in view of these. Such measures include those
recommended by the specified standard:
- controlling the actuators via a “deadman’s button” placed near the system and within
the operator’s field of view, to ensure that people are out of the way during operation.
The button should be placed at a height of 1.5 m and operated by key if accessible to
the public; or:
- use of contact safety systems (also included in the actuators) that ensure a maximum
closing force of 400/150/25 N, measured in accordance with paragraph BB.20.107.2 of
IEC 60335-2-103; or:
- use of non-contact safety systems (lasers, light grids); or:
- use of fixed safety barriers that prevent access to moving parts.
Automated windows are deemed adequately protected if they:
- are installed at a height of >2.5 m; or:
- have a leading-edge opening of <200 mm and a closing speed of <15 mm/s; or:
- are part of a smoke and heat evacuation system for emergency use only.
In any case, moving parts of windows that could fall below 2.5 m following breakage of a
system component need to be fixed or secured in order to prevent them from suddenly
falling or collapsing: e.g. the use of safety arms on bottom-hung windows.
The device is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lacking experience and knowledge. Do
not allow children to play with the fixed controls and keep any remote-control units
out of their reach.

The actuator is destined exclusively for installation indoors. For any special
application we recommend you consult the manufacturer beforehand.
After removing packaging, check for any damage on the appliance.
MAINTENANCE and REPAIRS
Periodically check the installation by inspecting the cables, springs, rods and
mechanical parts for wear or damage. Do not use if repair or adjustment is required.
4
Disconnect the power supply during cleaning or maintenance operations.
Do not use solvents or jets of water to wash the appliance. The appliance should
not be submerged in water.
In the event of breakage or malfunction, switch the appliance off at the general
switch and call for the services of a qualified technician.
Repairs should only be performed by qualified personnel at assistance centres
authorised by the manufacturer.
Always request exclusive use of original spare parts. Failure to respect this
condition could compromise safety and invalidate the benefits contained in the
warranty for the appliance.
In the event of any problems or queries, consult your agent or contact the
manufacturer directly.
2. Construction and standards
INTENDED USE
The MR28-B tubular gear motor is destined exclusively for
moving curtains and small blinds; any other use is strongly discouraged, with
the supplier of the entire system in any case retaining sole liability.

The actuator is manufactured in accordance with the EC Directives and
Regulations listed in the attached Declaration of Incorporation and Conformity .
Electrical connections must conform to regulations in force for the design and
set up of electrical equipment.
To ensure efficient separation from the grid, an approved type of bipolar “dead-
man” switch should be used. An omnipolar general power switch with minimum
distance of 3 mm between contacts should be installed upstream of the control line.
3. Technical data
Model
MR28
-
B
/ 24V
Voltage supply 24V
Traction force 0,70 Nm
Theoretical capacity load on tube Ø28 5,5 Kg
Limit switches maximum programming
height
20 m
Power input 0,340 A
Power absorbance on charge 8,8 W
Feeding cable 2x0,50 mm
2
– 3m
No turns in up phase (at nominal charge) 24 rpm
No turns in down phase 32 rpm
Double electrical insulation Low tension
Service S
2
of 2 min
Working temperature - 5 + 65 ºC
Electrical device protection rating IP44
End stroke Programmable electronic revolution indicator
Connection of two or more devices in parallel
Yes
Dimensions Ø24,5 x 210 mm
Number of pieces per package 6 pieces
Device weight 0,282 Kg
Any data reported in this table is not binding and may be susceptible to variations without notice.

5
4. ID plate and marking data
The Machine Directive classifies actuators as “partly completed machinery” and they
are supplied with a Declaration of Incorporation, attached to this booklet; with regard to
the electrical side, they bear marking and come under the LVD and CEM Directives
and the other Regulations listed in the attached Declaration of Conformity. With this
marking, the actuators can be sold and used throughout the European Union with no
further requirements. The plate data is displayed on an adhesive label placed on the
outside of the container, printed in black on a grey background.
5. Electricity supply
MR28-B gear motors can use 24V . For
this reason, a feeder with an outcoming
tension correspondent to the one
indicated on the technical data label
attached to device and which transforms
supply mains voltage (230V~50Hz or
other) in 24V should be used.
Correct functioning is guaranteed if a
feeder type approved or suggested by the
manufacturer is used.
The manufacturer also provides the ALì-
SW power supply device, built specifically for this type of application, which can directly
power and control the gear motor of the blind.
The power supply device is designed to be inserted in the Italian 3-module recessed
power and switching box, and the gear motor control uses the innovative touch-switch
technology that activates the control by simply touching the “deadman's switch” key or
in automatic steps. The touch-switch board can be applied on any commercial hole-
cover element maintaining an elegant electric control integrated in the design of the
home environment.
5.1. Section choice of supply cables
In low tension supply systems, tension falls due to current passage in conductors is a
basic aspect for safety and good appliance function. It is therefore extremely important
that the conductor section in function of cable length is calculated correctly.
The following table indicates cable lengths for a gear motor connected to a 24V
feeder, with power suitable for moving a motor on its nominal charge. In the event that
only a feeder is used to furnish energy to various gear motors, divide the cable length
for the number of gear motors connected.
Cable with 2 conductors
24V
4,00 mm
2
~ 1.000 m
2,50 mm
2
~ 750 m
1,50 mm
2
~ 450 m
0,75 mm
2
~ 160 m
0,50 mm
2
~ 130 m
6
Never connect two feeders to the same gear motor.
6. Assembly
THESE INDICATIONS ARE INTENDED FOR THE ATTENTION OF TECHNICIANS AND SPECIALIZED
PERSONNEL. BASIC JOB AND SAFETY TECHNIQUES ARE THEREFORE NOT INCLUDED.
All preparatory operations, assembly and electrical connections must be carried out by
technical and specialized personnel to guarantee best performances and good function
of the MR28-B tubular gear motor. First of all, please check that the following
fundamental assumptions have been satisfied:
Check that the electrical supply used corresponds to the indications on the
“TECHNICAL DATA” label attached to the machine and that the given
temperature range is compatible with the place of installation.
Gear motor performances must be sufficient to move the curtain; any limits
indicated in the technical data table on the product cannot be exceeded
(page 4).
Ensure the gear motor has not been damaged during transport, first visually
and then by working it in both directions.
Check that the inner section of the window length is over 270 mm in length.
Anything shorter than this will not allow for assembly of the gear motor.
Before mounting gear motor into position, ensure supports have been adequately
prepared. These operations must be carried out “at the bench” with the help of
minimum equipment.
6.1. Blind support tube and end cap
CAUTION: the blind support tube must have an internal diameter of 26 mm.
After cutting the blind support tube to the desired length, which depends on the width of
the window, the tube must be cleaned of all burr caused by the cutting; it is
recommended that a deburring knife be used to round the internal edges in order to
facilitate insertion of the support end caps.
6.2. Gear motor
 Insert the gear motor into the tube until it reaches the stop of the sliding bush.
 At a distance of 206 mm from the head unit of the gear motor (see figure 1), drill 2
holes at 180° to one another with Ø2.5 mm and 10 mm deep.

7
Figure 1
 Use a conical tool to make a small flare at 90° which will contain the head of the
screw.
 Take the M3x8 countersunk head screws provided and screw them into the two
holes. The holes do not require tapping since these are self-tapping screws.
 Fix each screw until the head disappears completely.
 Caution. If the head of the screw protrudes from the windup tube, the depth of
the flare must be increased accordingly. Any protrusion of the screw from the
tube may damage the fabric being wound up around the roller.
6.3. Assembly of the supports
Follow the steps below.
 Carefully select the position at which to fix the supports. Horizontal fixing uses the
holes in line with the tube, whereas orthogonal fixing uses the holes located at 90°
on the bracket.
 The support bracket with the cross slots should be positioned near the motor, i.e.,
where the power supply cable comes out.
 Take the plastic bush with Ø4 hole that can be found in the bag of small metal parts
and assemble it in the hole of the other bracket; this requires a certain amount of
pressure so an appropriate tool should be used.
 Mark the positions of the holes with a pencil.
 Depending on the type of support (wall, frame or other), use a drill bit to drill a hole
with the selected diameter in the points marked previously with the pencil.
 Screw in the screws without tightening them and check the linearity and orientation
of the brackets.
6.4. Assembly of motorization
 Insert opposite motor cover pin in opening provided on bracket.
 Insert protruding tongue of motor head into cross threading slot and position in
alignment with curtain.
 Check that wrapping tube is horizontal. Should this not be the case, loosen fixing
screws and reset properly. Remember that even a slight inclination of the mounting
means that the curtain is not aligned and will produce waves in the fabric.
 Fix bracket screws permanently into position.
206 mm
8
7. Electrical connections
The cable furnished with the MR28-B tubular gear motor is 2 m long and has been
calculated in accordance with safety rules. In the event that the distance between the
gear motor and feeder should exceed this length, the cable should be extended.
See table on page 5 for conductor section indications.
For harness, please follow the diagram indicated on this page.
After connecting electricity supply to feeder, check that up key function opens the
curtain and down key function closes it. In the event that keys function to the contrary,
invert cable positions.
8. Luminous indications on led
Before activating the gear motor, familiarise yourself with messages indicated by the
red led on the head of the gear motor. This will allow you to check machine is
functioning properly or allow you to recognize possible anomalies.
LED function Meaning
Constantly on Motor in use. Limit switch programming active.
300ms on – 300ms off Motor not programmed; limit switch programming
phase.
100ms on – 1sec off Motor in electronical protection due to excessive
charge.
1sec on – 1sec off Motor has regularly reached a limit stop but is still
connected to electricity supply.
100ms on – 100ms off Encoder error
9. Adjustment of the two stroke-ends
The gear motor allows you to adjust the stopping position of the blind at the desired
upper or lower points. Both stroke-ends are programmed in the same step, by using
the up and down control button and removing the plug located on the head unit of the
gear motor. The motor is factory set with a random stroke-end, i.e., not following any
particular logic.
The programming procedure is simple and immediate; just strictly follow the steps
below:
24V

9
1. Remove the plug (which looks like a screw) housed on the head
unit of the gear motor (see figure to the side). The plug has a
small magnet used to block the programming of the two stroke-
ends.
2. Operate the control button in one direction (either up or down, it
doesn't matter) and move the blind into the desired position
without ever reversing the direction of travel; there can be
intermediate stops as long as the next command is in the same
direction.
3. During the control action, the LED must be flashing. This means that the stroke-
ends are being programmed.
4. Operate the control button to reverse the direction of travel and move the blind to
the opposite desired position, again without ever reversing the direction of travel.
5. The LED must be flashing during the entire control phase.
6. Insert the plug into its position (see figure to the side). Now the programming is
finished.
7. Perform a complete stroke up and down of the blind and check that it stops in the
desired position. In this case the LED should remain steady-on during the entire
control phase.
8. Otherwise, repeat steps 1 to 6. The programming of the stroke-ends can be
repeated as often as necessary.
9. Perform a few maneuvers to check the blind's operation.
10. Troubleshooting
Please consult the following table for any eventual problems with function during
installation or normal use:
Problem Possible cause Solution
Gear motor doesn’t work.
No electricity supply for
feeder.
Check state of safety
switch.
Connecting cable not
connected or wire not
connected.
Check all electrical
connections of gear motor.
Feeder doesn’t deliver
foreseen tension (24V ).
Possible transformer
winding break down.
Led is lit but gear motor
doesn’t work.
Limit switch programming
is too close.
Loosen screw on head and
reset limit switch
programming.
Gear motor is damaged
due to a shock. Motor
connection has
unsoldered.
Send gear motor to a
Service Centre.
In spite of programming,
gear motor doesn’t get one
or both limit switches.
Programming hasn’t been
carried out correctly. Repeat programming.
10
11. Indications for correct assembly
Check that curtain is perfectly spread without any folds or looseness.
Check that both up and down limit switches have reached the desired
positions
Check that the gear motor support brackets are aligned and the four fixing
screws are firmly screwed into position
12. Environmental protection
Respect safety instructions.
All materials used in the manufacture of this appliance are recyclable.
We recommend that the device itself, and any accessories, packaging, etc. be
sent to a centre for ecological recycling as established from laws in force on
recycling.
The device is mainly made from the following materials: aluminium, zinc, iron,
plastic of various type, cuprum, silica, silicone.
Dispose materials in conformity with local regulations about removal.
Disassemble the device using proper tools and separate components sending them to
an ecological centre for recycling.
13. Warranty

The Manufacturer guarantees good machine function and undertakes to
replace any defective parts due to bad quality materials or construction defects.
This warranty covers products or their single parts for a period of 2 years from
the date of purchase. The warranty is valid if the buyer can present proof of
purchase and has satisfied any conditions of payment accorded.
The guarantee of good function of the device accorded by the manufacturer is
understood to cover the replacement and repair free of charge, in the shortest
possible period of time, of any eventual parts that should be damaged when
under warranty. The Buyer has no right to any compensation for possible
damages, direct or indirect, or other expenses. Any attempt at repair by
unauthorised persons renders this warranty null and void.
All fragile parts and those parts exposed to natural wear, as well as parts
submitted to agents or corrosive processes, temporary overload etc. are
excluded from this warranty. The Manufacturer will not accept responsibility for
possible damages caused by erroneous assembly, movement or insertion, use
of excessive stress or improper use.
Any repairs carried out under warranty are always intended “Ex-factory
producer”. Relative transport expenses (outgoing / return) will be the
responsibility of the Buyer.

11
14. Dichiarazione di Incorporazione (per una quasi macchina) e
Dichiarazione CE di Conformità / Declaration of incorporation
(for a partly completed machine) and EC Declaration of
Conformity.
Con la presente il / Hereby the
Costruttore:
Manufacturer:
NEKOS S.r.l.
Via Capitoni 7/5- 36064 Mason Vicentino (Vicenza) - Italy
Tel [phone] – Email [e-mail]
dichiara sotto la propria responsabilità che i seguenti prodotti
declare under its own responsibility that the following products
Descrizione prodotto:
Product Designation:
Attuatore a cremagliera, lineare a stelo, elettroserratura, tubolare per tende
Rack and pinion drive, linear drive, electromechanical lock, tubular drive
Modello:
Type:
230 V: SKY450 – SKY 650
NKL 450
24 V: SKY 650
K-LOCK – BK-LOCK
MR28-B
Anno di costruzione dal / Year of manufacturing from: 2017
Soddisfano gli applicabili requisiti essenziali della
Direttiva Macchine 2006/42/EC, Allegato I
Fulfil the essential requirements of the Machinery Directive 2006/42/EC, Annex I, Art. 1.1.2, 1.1.3, 1.1.5, 1.2.1,1.2.3,
1.2.6; 1.3.2, 1.3.4, 1.3.9, 1.5.1, 1.5.2, 1.5.6, 1.5.7, 1.5.8, 1.5.9, 1.5.10, 1.5.11, 1.7.1, 1.7.1.1, 1.7.3, 1.7.4.2, 1.7.4.3
La documentazione tecnica pertinente è compilata secondo l’Allegato VII, sezione B
The relevant technical documentation is compiled in accordance with Annex VII, Part B
La persona autorizzata a costituire la documentazione tecnica pertinente è:
The person authorised to compile the relevant technical documentation is: ing. Matteo Stefani – Nekos S.r.l.
Su richiesta adeguatamente motivata delle autorità nazionali, la documentazione tecnica dei citati prodotti sarà resa
disponibile, via e-mail, entro un tempo compatibile con la sua importanza.
In response to a reasoned request by the national authorities, we will provide, via e-mail, the relevant information on
the product listed above within an adequate period proportional to its importance.
Inoltre i succitati prodotti sono conformi alle disposizioni pertinenti delle seguenti Direttive:
Furthermore the products listed above complies with the provisions of followings Directives :

2014/30/EU Direttiva Compatibilità Elettromagnetica / ElectroMagnetic Compatibility Directive (EMCD)
 2014/35/EU Direttiva Bassa Tensione / Low Voltage Directive (LVD)
 2011/65/EU Direttiva sulla restrizione dell’uso di determinate sostanze pericolose nelle apparecchiature
elettriche ed elettroniche (Direttiva RoHS) / Restriction of the use of certain hazardous substances Directive (RoHS
Directive)
e delle seguenti norme armonizzate e/o specifiche tecniche:
and of the following harmonised standards and/or technical specifications:
EN 60335-2-103; EN 61000-6-3:2007 + A1:2011; EN 61000-6-2:2005 + AC:2005
EN 60335-1:2012 + EN 60335-1/A11:2014; EN 50581:2012;
La messa in moto di una macchina completa che includa la quasi macchina sopra menzionata, da noi fornita, non è
permessa finché non sia accertato che l’installazione sia stata fatta secondo le specifiche e le indicazioni di
installazione contenute nel “Manuale d’istruzioni” fornito con la quasi-macchina, e che sia stata espletata e
documentata, in apposito protocollo, una procedura di accettazione da parte di un tecnico abilitato.
Commissioning of the complete machinery including the above mentioned drives delivered by us is not allowed until it
is ascertained that the installation of the complete machinery was performed in accordance with the specifications and
the operating and installation advice given in our Mounting Instructions, and that the acceptance procedure was duly
carried out and documented in an acceptance protocol by a specialist.
Questa dichiarazione è fatta dal costruttore / This is declared by the manufacturer:
NEKOS S.r.l. - Via Capitoni 7/5- 36064 Mason Vicentino (Vicenza) - Italy
Rappresentato da / Represented by:
Giuliano Galliazzo – A.D. Presidente / President CEO
Firma / Valid signature
Luogo e data / Place and date: Mason Vicentino 28/07/2017
12
NEKOS S.r.l. - Via Capitoni, 7/5
36064 Mason Vicentino (VI) – ITALY
[phone] –  [phone]
www.nekos.it [email protected]