Alu Rehab Netti 4U comfort CED User manual

Netti 4U Base
USER MANUAL
This product conforms to 93/42/EEC for medical products.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
CONTENTS
1. INTRODUCTION 4
1.1 Areas of use/indications for Netti 4U Base 5
1.2 Contraindications 5
1.3 Quality and durability 5
1.4 Environment and waste disposal 5
1.5 Information for re-use 6
1.6 About this manual 6
1.7 Vital measures 7
2. QUICK REFERENCE 8
3. DESCRIPTION 9
4. FEATURES OF NETTI 4U Base 10
5. ACCESSORIES 11
5.1 Assembly of Hip-Belt 13
6. ASSEMBLY AND ADJUSTMENT
6.1 Unpacking 13
6.2 Main wheel 13
6.3 Front castors 14
6.4 Seat height adjustment 14
6.5 Backrest 15
6.6 Anti tip 16
6.7 Seat depth adjustment at the rear 16
6.8 Seat depth adjustment in front 17
6.9 Moulded seat and Seat cushion 17
6.10 Backrest cushion 17
6.11 Foot supports 17
6.12 Head support 20
6.13 Arm support 22

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
6.14 Adjusting the brakes 22
6.15 Seat angle/tilt 25
6.16 Back rest angle 25
7. MANOEUVERING THE WHEELCHAIR 25
7.1 General techniques 25
7.2 Driving techniques - Step up 25
7.3 Driving techniques - Step down 26
7.4 Driving techniques - Slope 26
7.5 Driving techniques - Up stairs 27
7.6 Driving techniques - Down stairs 27
7.7 Transfer 27
7.8 Lifting the wheelchair 28
7.9 Push rim 29
8. TRANSPORT 29
8.1 Folding for transport 29
8.2 Transporting in car 29
9. MAINTENANCE 30
9.1 Maintenance instructions 30
9.2 Cleaning and washing instructions 31
10. TROUBLESHOOTING 32
11.TESTS & WARRANTY 33
11.1 Tests 33
11.2 Guarantee 33
11.3 Claim 33
11.4 Spare part guarantee 34
11.5 Special adjustment/adaptation 34
11.6 Combination with other products 34
11.7 Service and repair 34
12. MEASURES & WEIGHT 35

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
1. INTRODUCTION
Netti 4U Base is a wheelchair chassis meant to
function as a base for external seating systems
and modular seats, as well as for the Netti
Seating System.
In Alu Rehab we believe that wheelchairs
should be chosen based on a thorough
assessment focusing on the needs of the
user and demands from the environment.
Therefore it is important to know about
the possibilities and restrictions of the
wheelchair.
The wheelchair is constructed for indoor and
outdoor use.
Max user weight: 125 kg.
When mounting accessories such as
power kit, external seating systems etc,
the weight of the accessories must be
subtracted from the max user weight.
Specications varies between countries.
Netti 4U Base without Netti Seating System
Netti 4U Base with Netti Seating System

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
1.1 Areas of use/indications
for Netti 4U Base
Netti 4U Base is a wheelchair chassis to be
used in combination with external modular
seats and seating systems, alternatively
with solutions from Netti Seating System.
The seating system is chosen based on the
needs of the user, and the Netti 4U Base
will provide added stability through a wide
range of foot supports, arm supports and
head supports. In addition the Netti 4U Base
provides unique tilt and recline functions in
combination with very good manoeuvring
properties.
1.2 Contraindications
In case of users with a strongly enhanced
muscular spasticity. We recommend to use
reinfoced foot supports and head support.
1.3 Quality and durability
The Netti 4U Base wheelchair is tested at
TÜV SÜD Product Service GmbH in Germany,
following the European Standard DIN EN
12183:2009. As manufacturer, Alu Rehab A.S
evaluates the test to be equal to 5-6 years
of normal use of the chair. The disability of
the user as well as the level of maintenance
done foremost decides the durability of the
wheelchair. Thus, the durability will vary
depending on these two factors.
1.4 The environment and
waste disposal
Alu Rehab and its suppliers wish to
protect the environment.
This means:
• That we avoid using
environmentally harmful
substances and processes to the
greatest extent possible.
• That Alu Rehab’s products are
ensured a long service life and a high
degree of exibility - to benet the
environment and economy.
• That all packaging can be recycled.
• That the wheelchair was designed to
be separated into its component
materials - to make recycling easier.
Contact your local recycling agent
to get correct information how to
handle in you area.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
1.5 Information for re-use
All products from Alu Rehab are designed
to give years of maintenance-free service.
All products can be adapted for re-use by
an authorised dealer. In order to guarantee
performance and safety, Alu Rehab
recommendsthefollowingtests priortoany
re-use.
Please examine the following components
for function, integrity etc. and replace parts
as necessary:
• Wheels (tyre tread)
• Wheelchair frame
• Cushions
• Hubs
• Brake function
• Directional stability of wheels
• Bearings
Please also note the content of chapter 9.2
Cleaning and washing
Anti-tip
Correctly tted, the anti-tip will secure the
chair from tipping backwards. We strongly
recommend use of the anti-tips.
1.6 About this manual
In order to avoid damages while using the
Netti 4U Base wheelchair, please read
this manual carefully before starting to use
the chair.
Symbol of forbidden actions.
No warranty can be claimed
when-ever these actions are
implemented.
Symbol of warning.
Whenever this symbol is used,
caution has to be taken.
Symbol for
important
information.
Symbol for useful
tips.
Symbol for tools.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
1.7 Vital measures
Netti 4U Base is a chassis designed for both
outdoor and indoor use.
Specications varies between
countries.
Total weight: 29,5 Kg
(500 mm width chair)
Seat width:
350, 400, 450, 500 mm
Seat depth:
(From back rest cushion to front of seat
plate)
375, 400, 425, 450, 475, 500, 525, 550 mm
Seat height:
(From oor to top seat plate using 24”main
wheels in upper hole position).
465 mm*
*By changing position of main wheels, it is
possible to achieve seat height of 500 mm.
whewheel
Backrest height:
500 mm
Specication min. max.
Overall length with foot
support
1130 mm
*1110mm
-
Overall length without
foot support
930 mm
*880 mm
-
Overall width 530 mm 680 mm
Reversing / Pivot width 1400 mm -
Total height 1100 mm
Total mass 29,5 kg -
Mass heaviest part 2,5 kg -
Maximum safe slope -8º
Seat plane angle - 8°22°
Eective seat depth 425 mm
*375 mm
550 mm
*500 mm
Eective seat width 350 mm 500 mm
Seat surface height at front 465 mm 500 mm
Backrest angle 92°137°
Backrest height 500 mm -
Foot support to seat
distance
280 mm 770 mm
Leg to seat surface angle 105°182°
Arm support to seat
distance
260 mm 355 mm
Front location of arm
support structure
320 mm 460 mm
Push rim diameter 535 mm -
Horizontal axle location -50 mm 25 mm
Minimum turning radius 860 mm -
Measured without cushions.
* Seat widths 350 and 400 mm.
Model

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
2. QUICK REFERENCE
The content of this page is a summary
of the whole manual. It gives a brief
introduction to the use and care of the
Netti 4U Base wheelchair.
The quick reference is not a replacement
for the manual, only a reminder/check
list.
• Unpack the wheelchair (Chapter 6.1)
• Mount the main wheels (Chapter 6.2)
• Mount the front castors (Chapter 6.3)
• Put the back rest back, and mount the
recline gas strut to the back rest using the
locking bolt. (Chapter 6.5)
• Mount the foot supports (Chapter 6.11)
• Mount the head support (Chapter 6.12)
• Set anti-tip in active position (Chapter 6.6)
• Mount accessory. (See chapter 5 for more
information. Mounting descriptions will
accompany the accessory.)
For troubleshooting, see chapter 10.
For mounting and adjustments see
chapter 6.
Drive carefully!
Be aware that friction against push
rims can create a warm surface.
Salt water can increase risk of
corrosion. Further precautions related
to environmental conditions not
needed.
When the chair is tilted rearwards,
the anti tips and brakes should
always be in use.
Be sure to lock all handles properly.
The anti-tips should always be used
for the safety of the user.
Surface temperature of metal parts in
frame structure might increase when
exposed to direct sunlight.
Never stand on the foot supports due
to risk of tipping forwards.
Never lift the wheelchair by the foot
supports or arm supports.
Product conguration may vary
between dierent countries.
For visually impaired people, manuals
and catalogues can be downloaded at
www.alurehab.com
If in doubt - contact your dealer!

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
3. DESCRIPTION
Standard version*
1. Push bow
2. Head support
3. Angle and depth adjustment for
head support
4. Release handles tilt/recline
5. Head support bracket
6. Arm support with pad
7. Seat plate
8. Angle adjustable foot support
9. Calf support bracket
10. Foot board
11. Calf support
12. Front castors
13. Front fork
14. Main wheel
15. Anti tip
16. Brake handle
If any of these parts are
missing, please contact your
dealer.
* Product conguration may vary
between dierent countries.
Some markets add backrest velcro
and seating system as standard,

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
Standard
SEAT
• Netti Uno|Seat cushion*
• Tilt -8° to +22°
• Adjustable depth of 12.5 cm
WHEELS
• 16 x 1 3/4”drum brake or 24 x 1”
standard puncture proof main wheels
with quick release axle
• Push rim: Aluminium
• 7”Puncture proof front castors with
quick release axle
Standard main wheels may vary
between countries.
BACKREST
• Angle: 92° to 137°
• Height: 50 cm
• Backrest velcro*
• Netti Uno|Back cushion*
• Push bow
FOOT SUPPORT
• Universal or Angle adjustable
foot support
• Height- and angle adjustable foot
plates or foot board
• Removable
ARM SUPPORT
• Height and depth adjustable
• Revolvable
HEAD SUPPORT
• Height, depth and angle adjustable
• Removable
* Netti 4U Base with Netti seating system
Accessories
SEAT
• Pressure distributive cushions
WHEELS
• Puncture proof PU wheels 12”x1 3/4”, 16”x1
3/4”, 22x1 3/8”
and 24x1 3/8”with drumbrake (See chapter 5)
• 22x1”& 24x1” standard puncture proof main
wheels
• 6”& 7” Puncture proof front castors with
quick release axle
BACKREST
• Dierent backrest cushions
• Backrest extender (See chapter 5)
• Lumbar support and wedge (See chapter 5)
FOOT SUPPORT
• Universal or Angle adjustable
foot support
• Height- and angle adjustable foot
plates or foot board
• Removable
ARM SUPPORT
• Hemi cushions (See chapter 5)
HEAD SUPPORT
• Dierent head support models
(See chapter 5)
4. FEATURES OF NETTI 4U BASE

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
Backrest Cushions
Dierent models.
Please contact your
dealer.
Foot supports:
Angle adjustable
Universal
Adjustable in xed positions
between 33° to 105° using an
adjustment wheel.
Amputation support
Upholstery for
calf support bracket
Reduces pressure.
Anti tip
Anti tip with pedal.
5. Accessories
Belts
Several variants:
Hip belts with or
without uphols-
tery and with
plastic lock or
car lock.
(See chapter 5.1 for mounting)
Trays
Dierent models
Upholstery for tray
Oers a soft base for
the arm resting on the
tray.
Wedge
Increases side support.
Lumbar support
Increases lumbar
curvature.
Vital Base Integral
Pelvic stabilizer.
Seat Cushions
Dierent models.
Please contact your
dealer.

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Head support
Support C Large.
Support A Side support
Support B Small
Hygiene cover
Protects the core of the
head support.
Head cushion
40x40 cm cushion with
Kospoex lling and rubber
band.
Head cushion Comfort
Cushion with Kospoex
lling to pull onto
head rest.
Hemi cushion
An accommodating
support for hemiplegic
users.
Backrest extender
12 cm extender.
To be used together with
60 cm back rest cushion.
Foot board with lock
The foot support can
be swung to the side
like standard foot
supports.
Side support Correction
Meant for correction of
bad postures in the
upper trunk.
Pad for side support
Correction
Side support Stable
Meant for users with de-
creased stability of the
upper trunk. For otimal
function use together
with Stable cushion.
Pad for side support Stable
Calf pad hinged
The user doesn’t
have to lift the leg
when mounting or
dismounting the
foot supports.
Abduction block
The block reduces
abduction.
Small: 80 mm width
Medium: 120 mm width
Large: 140 mm width
Main wheels
12”& 16”
24”with drumbrake

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
6. ASSEMBLY AND
ADJUSTMENT
6.1 Unpacking
1. Unpack all the parts, and check that
everything is there according to the
packing list.
2. Mount the main wheels (Chapter 6.2)
3. Mount the front castors (Chapter 6.3)
4. Check/adjust the seat dept (Chap.
6.7/6.8)
5. Mount the back rest (Chapter 6.5)
6. Mount the moulded seat and the seat
cushion (Chapter 6.9)
7. Mount the backrest cushion (Chap. 6.10)
8. Mount the foot supports (Chapter 6.11)
9. Mount the head support (Chapter 6.12)
10. Mount any accessories (Chapter 5).
Weight of components (45 cm width chair):
Main wheels: 1,9 kg each
Anti tip: 0,1 kg each
Front castors: 0,8 kg each
Foot support angle adj.: 2 kg each
Seat cushion: App. 1 kg
Head support A: 1 kg
Head support C: 0,9 kg
6.2 Main wheel
1. 22”& 24” main wheel.
To mount the main wheel remove the
quick release bolt from the hub bushing,
lead it through the centre of the main
wheel
and into the hub
bushing while
pressing the
knob in center.
5.1 Assembly of hip belt
Illustration 5.1.1
• Pull the belt through the hole in the hip
belt bracket.
Ill. 5.1.1
Illustration 5.1.2
• Thread the belt back through the belt clamp.
Ill. 5.1.2
Illustration 5.1.3
• Fix the hip belt bracket to the back rest
hinge in the rearmost hole, using the
enclosed screws and nuts.
Ill. 5.1.3
2pcs 13 mm open-end spanner.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
6.4. Seat height adjustment
The seat height at the rear depends on:
• Size of main wheel.
• Position of main wheel.
• Using 24”main wheels in the upper hole,
the seat height is 46.5 cm from the oor
to the seating plate. Using 24”main
wheels in the next upper position, the
height will measure 50 cm to the seating
plate.
• Using 22”main wheels in the upper hole,
the seat height is 44 cm from the oor
to the seating plate. Using 22”main
wheels in the next upper position, the
height will measure 47.5 cm to the
seating plate.
If it is required to change position of the
main wheels or to change to a dierent
size of main wheels, unx the hub bushing
including washer and nut. Remove the
hub bushing and mount it in the required
position.
2 pcs 24 mm open-end spanners
Make sure that the nut on inside of
frame totally wreathes the wheel
bushing.
2. 12”& 16” main wheel.
• Insert wheel bushing and lock pin into wheel
frame.
• Fix the wheel bushing with a 24 mm open-end
spanner.
To check that the main wheel is
properly attached to the hub, remove
the nger from the central knob and
pull at the main wheel.
If the main wheel doesn’t lock, don’t
use the wheelchair but contact
your dealer.
Sand and sea water (salt used for
gritting in the winter) can damage
the bearings of the main wheels and
front castors. Clean the wheelchair
thoroughly after exposure.
6.3 Front castors
To take o
• Press the release button under the front
fork.
To mount
• Lead the quick release axle into the
bearing house. Pull the fork slightly to
ensure that the fork is fully locked.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
Main wheels and front castors should be
mounted according to the description below.
When the seat height is changed ensure
that the front castors are placed so
that the lower frame tube is parallel
with the ground.
Check the position of the anti tip
and readjust the brakes after moun-
ting the main wheels or changing the
main wheel position.
6.5 Backrest
• To mount the gas spring, lift the push
bow with one hand, and lead the gas
spring locking head into the plastic
bracket with the other (Ill. 6.5.1).
• Check that the hole in the locking head is
parallell with the open holes in the plastic
bracket.
Ill. 6.5.1
• Lock the backrest by pushing the locking
bolt through the plastic bracket and
gas spring locking head (Ill. 6.5.2.)
Ill. 6.5.2
To check that the back rest is
locked, grip the push bow and
press the back rest forward.
If the back rest falls forward -
repeat the locking procedure
or contact your local dealer.
• The wheelchair is set to a standard seat
depth, and the plastic bracket has 4 holes
of which three are temporarily blocked
with plastic plugs (Ill. 6.5.3),
Ill. 6.5.3
24" main
wheel
24"
main
whee
l
16"
main
wheel
12" main wheel
24", 16" and
12" main wheel
24" main wheel

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
• The back rest hinge has 4 holes (Ill. 6.5.4)
The hole positions are in accordance with
the holes in the plastic bracket. If the
locking head of the gas spring is
mounted in the inner hole of the plastic
bracket, the back rest hinge should also
be mounted in the inner hole etc.
Ill.6.5.4
• Find the required position for the locking
head in the plastic bracket, and remove
the plastic plug from this hole.
• Lock the back rest by pushing the locking
bolt through the plastic bracket and
the gas spring locking head.
• After changing the hole position in the
plastic bracket, the hole position in the
back rest hinge must be changed into the
parallell position.
Check that the hole in the back rest
hinge and the plastic bracket are
mounted into the same hole position.
6 mm Allen-key
6.6 Anti tip
The anti tips should be mounted according to
the mounting description which is enclosed
with the chair upon arrival.
Use of the anti tip
• Pull the anti tip out
• Turn it up or down 180°.
• Lock it in position
Adjusting the height of the anti tip
The anti tip can be adjusted in to xed
positions. The short position is for 12”& 16”
main wheels and 22”in upper position. The
long position is for 24”main wheels in lower
position.
• Unx the screw in the adjustable extension
piece as shown in picture below.
• This extension piece has two holes. Place
it in the required position and tighten the
screw.
5 mm Allen key
The anti tip should always be used for
the safety of the user.
6.7 Seat depth adjustment
at the rear.
• If the seat depth should be adjusted at
the rear, release the locking bolt from
the plastic bracket (Ill. 6.5.2).
• Find the required position for the locking
head in the plastic bracket, and remove
the plastic plug from this hole.
• Lock the back rest by pushing the locking
bolt through the plastic bracket and
the gas spring locking head.
• After changing the hole position in the
plastic bracket, the hole position in the
back rest hinge must be changed into the
parallel position.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
It is very important to place the cushion
in the wheelchair before use.
The cushion cover is washable and
reusable. Follow the instruction
on the back of the cushion for
correct maintance and washing of
the cushion.
6.10 Back rest cushion*
The back rest cushion is attached to the
back rest with the velcro.
* Some markets use Netti Seating System as
standard on Netti Base.
The seat and back rest cushion
covers are washable and thereby
reuseable. Follow the instruction on
the cushions for correct
maintanance and washing of the
cushions.
6.11 Foot supports
Netti 4U Base can be delivered with either
Universal or Angle Adjustable foot support.
Check that the hole in the back rest
hinge and the plastic bracket are
mounted in parallel position.
6 mm Allen-key
6.8 Seat depth adjustment
in front
It is possible to adjust the seat depth with
up to 10 cm in front. Do the following.
• Screw out the screws in the adjustment
piece (Ill. 6.7).
• Place the adjustment piece in the wanted
position
• Replace and tighten the screws
Ill. 6.8
6 mm Allen-key
If the user has spastic tendencies the
adjustment piece should not be pulled
out more than 5 cm.
6.9 Moulded seat and Seat
cushion
The moulded seat is to be xed to the
plywood seat plate by screws with regular
nuts or claw nuts. Then the seat plate must
be xed to the chair frame.
The seat cushion is xed on the wheelchair
with velcro.

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Language: English Model: Netti 4U Base Version: November 2012Language: English Model: Netti 4U Base Version: November 2012
Angle adjustable foot support
The angle adjustable foot support is freely
adjustable in angle. It is swingable and.
removeable. The foot plates are foldable and
canbaangledin xedpositions.Deliveredwith
height and depth adjustable calf. support.
Mounting of foot support
• Mount the foot support by holding onto
the hinge point of the foot support. Hold it
in an angle of app. 20° to the side frame. Put
it into the black plastic lock attached to the
extractable adjustment bar. Swing it in and
push down (Ill. 6.11.1.)
Ill. 6.11.1
Adjusting the angle - Universal foot support
• The angle of the foot support can be
adjusted using the star wheel in center
of the hinge point (Ill. 6.11.2).
• Loosening this star wheel enables you to
adjust the foot support to the required
angle.
• Fix the angle by tightening the star
screw.
Ill. 6.11.2
Adjusting the angle - Angle adjustable
foot support
• The angle of the foot support can be
adjusted using the star wheel in Ill. 6.11.3.
• Loosening this star wheel enables you to
adjust the foot support to the required
angle.
• Fix the angle by tightening the star
wheel.
Ill. 6.11.3
Squeeze hazard. When adjusting foot
supports in angle, do not put the
ngers in the adjusting mechanism
between the moving parts.
Ill. 6.11.4

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Adjusting the length of the foot support
• Untighten the screw (A) to make the
adjustment tube move
• Adjust the foot support in required
position and x the screw properly.
Ill. 6.11.5
In some markets a star wheel is used in stead
of the adjustment screw.
Adjusting the angle of the foot plate
• The foot plates can be adjusted in angle.
• Untighten the screw (B) and adjust the
foot plate to the required angle. Fix the
screw properly (Ill. 6.11.6).
5 mm Allen key.
Ill. 6.11.6
Locking and releasing the foot plates
•The foot plates come with a locking bolt
which make the plates stronger.
• To lock the foot plates pull the plastic
lock (Ill. 6.9.7) on the right foot plate and
place the lock over the bolt on the left
foot plate.
• To release the foot plate pull the plastic
lock (Ill. 6.9.7) and lift the right foot
plate up.
Ill. 6.11.7.
For outdoor use, there should be a
clearance of 4-5 cm between the
foot plate and the ground.
While making the adjustment there
must be no load on the foot plates.
Removing the foot support:
• Pull the plastic lock on the foot plate
rearwards, so that the pin is released,
and the foot plate can be folded up.
• Raise the foot support a few degrees.
• Release the foot support by pulling it
slightly straight up.
• Swing the foot support outwards.
• Lift and remove the foot support. (ill.
6.11.8.).
Ill. 6.11.8

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Adjusting the calf support
The calf support is height and depth
adjustable. To adjust in height
unx the nut on the outside of the
calf support bracket, nd the required
height and x the nut again (Ill.6.9.9.A).
10 mm open-end spanner
Ill. 6.11.9
To adjust in depth, the calf pad is
removed from the bracket by using an
open-end spanner between the pad and
the bracket. Find the required position
and rex it. (Ill. 6.9.9 B)
13 mm open-end spanner
Never stand on the foot supports!
Never lift the wheelchair by the
foot supports.
6.12 Head support
A - Lever for depth adjustment
B - Wheel for angle adjustment
C - Lever for height adjustment
D - Head support bracket
• Place the squared nut in the trace of the
head support bracket as shown above.
• Place the head support in the head
support bracket.
• The height and the depth of the head
support is set to the required positions
and tightened.