AAT S-Max SELLA D1353 User manual

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EN2023-02 (4.1)
Translation of the original user manual
D1353

2
Spare parts
Repair processing
Technical information
Product seminars
Showroom & exhibition devices
Re-use
Complaints
Rental devices
With our professional service concept
we at AAT prove once again our high
claim of quality and o󰀨 er our clients an
all-inclusive package.
We are at your service!
AAT service concept
Customer service at its best
AAT Alber Antriebstechnik GmbH
Ehestetter Weg 11 · 72458 Albstadt · Germany
Phone: [phone]
Fax: [phone]
[email protected] · www.aat-online.de
Assembly team
Phone [phone]
Phone [phone]
Fax [phone]
E-mail [email protected]
New devices
Phone [phone]
Phone [phone]
Fax [phone]
E-mail [email protected]
Head offi ce
Phone [phone]
E-mail [email protected]
Web www.aat-online.de
Service and repairs
Phone [phone]
Phone [phone]
Fax [phone]
E-mail [email protected]

3
All serious incidents occurring in relation to the device must be reported to the manufacturer and to the
competent authority of the Member State where the user and/or occupant is established.
WARNING
Failure to observe this user manual, in particular the safety instructions, can lead to defects in the s-max
sella and endanger the operator or occupant or persons in the immediate vicinity of the device! There is
an increased risk of injury! In the event of an infringement, claims for warranty and liability are excluded!
The product is state of the art and complies with the associated safety-related requirements. Neverthe-
less, a low level of residual risks cannot be ruled out. Please observe the safety instructions to this end.
People with visual and reading impairments or intellectual disabilities should print out the user
manual available on the website in enlarged letters or have this manual read to them, if neces-
sary. On our homepage, you will also  nd all safety-related changes which have been made to the
user manual. These versions with details of the production period of the product are obtainable at:
www.aat-online.de/de/bda/s-max-sella

4
Table of Contents
1 Symbols and safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 Explanation of the symbols on the packaging . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3 Explanation of the symbols on the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.1 Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2 Overview of type plate incl. serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Intended purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4 Intended patient population . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.5 Medical requirements and indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.6 Contraindications and restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.7 User group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.9 Dimensional drawing s-max D1353 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.10 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.11 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Seating/handle unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Battery pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Inserting the armrests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.4 Mounting the headrest (optional accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Unfolding and folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Unfolding the seating/handle unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Folding the seating/handle unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Starting up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1 Adjusting the handles to the correct height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Switching on the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.3 Neutral position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.4 Checking the safety brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.5 Single-step mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.6 ComfortStep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.7 Checking battery capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.1 Occupant taking a seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.2 Moving on level ground / overcoming obstacles . . . . . . . . . . . . . . . . . . . . . . . . . . .25
8.3 Tilting the stair climbing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.4 Moving on slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.5 Climbing stairs - Upwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.6 Climbing stairs - Downwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.7 Laying down on stairs / emergency stop function . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.8 Parking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
8.9 Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9 Care and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.1 Battery and charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.2 Checking brake linings and climbing feet linings . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.3 Cleaning and disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.4 Replacing fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.5 Technical safety testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.6 Reuse (change in operator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5
1 Symbols and safety instructions
DANGER - Imminent DANGER
If not avoided, this will result in death or severe bodily injuries!
WARNING - Possibly imminent DANGER
If not avoided, this may result in death or severe bodily injuries!
CAUTION - Possibly imminent danger or harmful situation
If not avoided, this may result in minor bodily injuries or damage to property!
iNOTE - Information by the manufacturer
General safety instructions
iNOTE
If you have a visual disability, this user manual can be downloaded at
www.aat-online.de/de/bda/ s-max- sella.
Read the user manual prior to start-up and observe the warning notices and safety instructions.
In the event of reading disabilities, cover training content in more depth verbally.
The user manual must be kept in a safe place after reading through it.
Does not consist exclusively of ame retardant materials. Keep the device away from sources of igni-
tion.
The s-max sella may interfere with highly sensitive electromagnetic elds of other electronic devices
(e.g. anti-theft devices).
Stability tests were performed under laboratory conditions. The s-max sella may behave di󰀨erently
under real conditions compared to laboratory tests.
Training may only be carried out by the manufacturer, the AAT eld sta󰀨 or the qualied specialist shop.
CAUTION
External heat sources may cause the surface temperature to rise (e.g. sunlight)!
Do not touch the a󰀨ected surfaces in this case to avoid burns!
9.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.8 Long-term storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10 Fault conditions and troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
11 Warranty and liability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
12 Recalls and corrective actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6
Symbol Explanation
Handle with care
The packaging including the product must be handled with special care.
Protect from moisture
Protect the packaging including the product from overly high air humidity.
Cover during storage. If necessary, cover thoroughly with tarpaulins.
Caution fragile
Handle the packaging including the product carefully and never allow it to fall.
This way up
The packaging must be stored and transported in such a way that the arrows
point upwards at all times. Any failure to comply with this rule, such as rolling
or tilting the package, must be avoided.
Temperature limit 0 to 40 °C
Please do not store packaging incl. product and battery pack below/above the
specified temperature limits.
2 Explanation of the symbols on the packaging
WARNING
Never reach into rotating/moving parts to avoid crushing.
DANGER
The s-max sella must not be operated in the case of severe visual impairment and/or blindness!
Do not exceed the total permissible weight and the max. person weight, as this may lead to defects or
overload the s-max sella!
Do not use in rain, wet conditions, snow or black ice to avoid slipping due to the reduced braking
e󰀨ect!
Do not use on escalators or travellators to avoid injuries from falling, the occupant tipping out and
damage to property!
The operability of the s-max sella may be inuenced by electromagnetic elds (e.g. by mobile phones,
electric generators, or high-voltage sources)!
Do not store near medical devices, for example with a life support function, and diagnostic devices, as
these may malfunction!
0°C
40°C

7
3 Explanation of the symbols on the device
Symbol Explanation
CE marking
Position: Type plate
The product complies with the relevant provisions of the EC Regulation EC 2017/745
(MDR)
20XX
Date of manufacture
Position: Type plate
Indicates the year the medical device was manufactured.
Manufacturer
Position: Type plate
Shows the manufacturer of the medical device (AAT Alber Antriebstechnik GmbH)
SN
SN
Position: Type plate
Serial number of the product e.g. D1353XXXXXX
Medical Device
Position: Type plate
Observe the user manual!
Position: Type plate
The user manual must be observed! (www.aat-online.de)
Attention!
Position: Type plate
Refers to the need for the user to review the user manual and important safety-related
information.
Barcode
Position: Type plate
Contains the AAT serial number
Technical safety test badge
(refer to chapter Technical safety test)
Position: Drive unit, left side
Informs about the due date of the next technical safety test
TÜV Süd test mark
Position: Drive unit underneath battery locking device (only with D1353)
Refers to the fact that the product has been successfully tested by TÜV Süd Product Ser-
vice GmbH according to the standards DIN EN 12182, DIN EN 12184 and the relevant
parts of ISO 7176.
Adhesive label on the drive unit (for D1353)
The device may only be operated by trained persons!
Max. load 135 kg.
Observe the user manual!
Check the safety brakes before use according to the user manual!

8
Adhesive label UP/DOWN
Position: UP/DOWN switch on the control panel
Refers to the direction of travel
(refer to chapter “Climbing stairs upwards and downwards”)

9
4 Product description
4.1 Device overview

10
Control panel
Handle, height-adjustable
Wheel
Armrests (fold away)
Climbing leg
Safety brake
Battery indicator
Single-step switch
ComfortStep
Battery pack and battery locking device
Type plate with serial number
Footrest (height-adjustable)
Locking knob for transverse adjustment
Locking knob for height adjustment
Speed control
Safety chip
ON/OFF switch
UP/DOWN switch
Seating/handle unit
Castors
Stanchion tube
Locking knob for stanchion tube
Release button and lever (folding seating/handle unit)
LED lighting to illuminate the stairs - underside of climbing unit (without illustration)
i
Manufacturer’s information:
For a simpli ed assignment of
the individual components, the
numbers listed here are cited in
full for the  rst time in the follow-
ing chapters.

11
4.2 Overview of type plate incl. serial number
4.3 Intended purpose
4.4 Intended patient population
The stair climbers are guided manually and are operated by an operator.
They make it possible to transport a single person with reduced mobility safely over stairs, upwards and
downwards. The products have been designed for indoor and outdoor use, and moving on spiral stairs
and slopes is possible, too.
The intended patient population includes all persons who are able to sit independently and have a maxi-
mum body weight corresponding to the technical specication of the respective model and variant (max.
135 kg for the s-max sella D1353).
Product / Model
Max. load
Batteries
Charging voltage
Operating voltage
Rated power of motor
Barcode (refer to chapter 3)
Serial number (refer to chapter 3)
Symbols (refer to chapter 3)
Manufacturer address

12
4.5 Medical requirements and indication
4.6 Contraindications and restrictions
4.7 User group
The patients must be able to sit independently. Secure persons who cannot sit upright unaided with belts
(refer to accessories) to prevent the occupant from falling out!
The manually guided stair climber with seating unit s-max sella makes it possible for an accompanying
person to transport a patient over stairs or slopes, upwards and downwards. The use of the s-max sella
is intended for patients who are not able to move by themselves over stairs or slopes.
The stair climbers must not be used if:
• the operator has obtained no training/instruction for the product!
• the operator is below the age of 16!
• there is no supervision for minors of at least 16 years of age!
• the operator is not physically and mentally able to operate the stair climber safely!
• more than one person shall be transported simultaneously!
• the person to be transported cannot sit upright unaided!
• the operator does not have adequate eyesight!
• the braking e󰀨ect is reduced due to rain, wet conditions, snow or black ice!
• the one-side and/or two-side braking e󰀨ect of stair climber does not set in!
• escalators or travelators shall be overcome!
• medical devices with e.g. a life support function, and diagnostic devices are in the proximity!
• it is not used according to the intended use!
The stair climbers are intended for the use by:
• medical sta󰀨,
• healthcare professionals,
• driving services, and
• laymen.
Users are trained in the use of the device by means of a training course.

13
4.8 Technical data
WARNING - Do not exceed the total permissible weight and the max. person weight, as this
may lead to defects or overload the s-max sella!
iNOTE - Observe the technical data.
Technology s-max sella D1353
Dimensions Refer to chapter "Dimensional drawing s-max D1353"
Own weight
Climbing unit = 16.1 kg
Handle/seating unit = 16.5 kg
Battery pack = 3.1 kg
Both armrests = 1.3 kg
Total weight without battery pack = 33.9 kg
Total permissible weight 172 kg
Maximum person weight (load) 135 kg3)
Climbing speed steps / min 1) 7 - 23, continuously adjustable
Range per battery charge for maxi-
mum load of 75 kg Approx. 25 oors (approx. 375 steps)
Range per battery charge for total
load Approx. 18 oors (approx. 270 steps)
Max. height of step 210 I 225 mm (extended)
Min. depth of step2) 120 mm
Required step width Width of s-max sella + 100 mm
Min. platform size 1350 x 1350 mm (U-shaped stairs)
Min. radius of spiral stairs 1350 mm
Min. step depth (spiral stairs)2) 140 mm
Max. slope of the stairs 60.3°
Tilt stability In direction of travel 3.7° / against direction of travel 2.7°
Batteries 2 x 12 V / 3.3 Ah (gas-tight)
Direct current motor 24 V / 200 W
Switching force UP/DOWN switch 3-8 N
Direct operating forces Max. 350 N when climbing stairs - downwards (chapter 8.6)
Sound pressure level < 69 dB
Storing/operating temperature: Device -40 °C to +65 °C / -25 °C to +50 °C
Storing/operating temperature:
Battery -20 °C to +65 °C(3) / -25 °C to +50 °C(3)
Battery charging temperature 0 °C to +40 °C
Altitude application range (sea level) < 3000 m above sea level
Vibration information The weighted RMS value of acceleration, to which the
upper body is subjected, is typically below 2.5 m/s2.
Adhesive label with serial number On the left of the housing and rear side of the user manual
IP protection class IPX4 degree of protection: protection against splashing water from all directions
Classication according to ISO 7176-
28:2012 Type C (according to Annex A, Table 1)
1) With activated ComfortStep, the climbing speed and the range are reduced. The range also depends on the weight of the occupant.
2) Any steps of a smaller depth may not be travelled as in this case it is no longer possible for the wheel to be set down safely.
3) At temperatures below 0 °C the performance of the battery pack will decrease; therefore we recommend a storage temperature of at least 0 °C.

14
4.9 Dimensional drawing s-max D1353
f
n
b
a
d
e
g
max. 1498
min. 1130
h1
h2
o
Für diese technische Unterlage behalten wir uns alle Rechte nach DIN 34 vor.
Ers. für
>315-1000
>120-315
>30-120
>6-30
Zust.
>0,5-6
Name Änderung Datum
±0,8
±0,5
±0,3
±0,2
±0,1
bearb.
gepr.
Werkstoff
Datum Name
Toleranzen
Zeichnungsnummer
Baugruppe
Benennung
BL.
Oberfläche
Werkstück-
kanten DIN ISO 13715
-0,3
+0,3
Maßstab
Revision
Status
AAT Alber Antriebstechnik GmbH
Rauheit
Reihe 3
26.01.2018
Kramer
D1353
1:2
1/3
www.aat-online.de
Fax: [phone]
Tel.: [phone]
D-72458 Albstadt
Ehestetter Weg 11
A0
DIN ISO 2768-1-m / DIN ISO 2768-2-m
DIN ISO 1302
1
In Bearbeitung
135kg-Ufo-Motor
s-max sella kpl. 135kg
031942
Artikelnummer
RoHS & REACH Compliant
Normen im Zeichnungsfeld vorrangig
943
c
i
338
Für diese technische Unterlage behalten wir uns alle Rechte nach DIN 34 vor.
Ers. für
>315-1000
>120-315
>30-120
>6-30
Zust.
>0,5-6
Name Änderung Datum
±0,8
±0,5
±0,3
±0,2
±0,1
bearb.
gepr.
Werkstoff
Datum Name
Toleranzen
Zeichnungsnummer
Baugruppe
Benennung
BL.
Oberfläche
Werkstück-
kanten DIN ISO 13715
-0,3
+0,3
Maßstab
Revision
Status
AAT Alber Antriebstechnik GmbH
Rauheit
Reihe 3
26.01.2018
Kramer
D1353
1:10
2/3
www.aat-online.de
Fax: [phone]
Tel.: [phone]
D-72458 Albstadt
Ehestetter Weg 11
A0
DIN ISO 2768-1-m / DIN ISO 2768-2-m
DIN ISO 1302
1
In Bearbeitung
135kg-Ufo-Motor
s-max sella kpl. 135kg
031942
Artikelnummer
RoHS & REACH Compliant
Normen im Zeichnungsfeld vorrangig
m
k
l
Für diese technische Unterlage behalten wir uns alle Rechte nach DIN 34 vor.
Ers. für
>315-1000
>120-315
>30-120
>6-30
Zust.
>0,5-6
Name Änderung Datum
±0,8
±0,5
±0,3
±0,2
±0,1
bearb.
gepr.
Werkstoff
Datum Name
Toleranzen
Zeichnungsnummer
Baugruppe
Benennung
BL.
Oberfläche
Werkstück-
kanten DIN ISO 13715
-0,3
+0,3
Maßstab
Revision
Status
AAT Alber Antriebstechnik GmbH
Rauheit
Reihe 3
26.01.2018
Kramer
D1353
1:2
3/3
www.aat-online.de
Fax: [phone]
Tel.: [phone]
D-72458 Albstadt
Ehestetter Weg 11
A0
DIN ISO 2768-1-m / DIN ISO 2768-2-m
DIN ISO 1302
1
In Bearbeitung
135kg-Ufo-Motor
s-max sella kpl. 135kg
031942
Artikelnummer
RoHS & REACH Compliant
Normen im Zeichnungsfeld vorrangig
m
k
l
Für diese technische Unterlage behalten wir uns alle Rechte nach DIN 34 vor.
Ers. für
>315-1000
>120-315
>30-120
>6-30
Zust.
>0,5-6
Name Änderung Datum
±0,8
±0,5
±0,3
±0,2
±0,1
bearb.
gepr.
Werkstoff
Datum Name
Toleranzen
Zeichnungsnummer
Baugruppe
Benennung
BL.
Oberfläche
Werkstück-
kanten DIN ISO 13715
-0,3
+0,3
Maßstab
Revision
Status
AAT Alber Antriebstechnik GmbH
Rauheit
Reihe 3
26.01.2018
Kramer
D1353
1:2
3/3
www.aat-online.de
Fax: [phone]
Tel.: [phone]
D-72458 Albstadt
Ehestetter Weg 11
A0
DIN ISO 2768-1-m / DIN ISO 2768-2-m
DIN ISO 1302
1
In Bearbeitung
135kg-Ufo-Motor
s-max sella kpl. 135kg
031942
Artikelnummer
RoHS & REACH Compliant
Normen im Zeichnungsfeld vorrangig
212
495
816
753
min. 1130
max. 1498
In Bearbeitung
s-max sella kpl. 135kg
031942
135kg-Ufo-Motor
RoHS & REACH Compliant
Für diese technische Unterlage behalten wir uns alle Rechte nach DIN 34 vor.
Ers. für
>315-1000
>120-315
>30-120
>6-30
Zust.
>0,5-6
NameÄnderung Datum
±0,8
±0,5
±0,3
±0,2
±0,1
bearb.
gepr.
Werkstoff
Datum Name
Toleranzen
Zeichnungsnummer
Baugruppe
Benennung
BL.
Oberfläche
Werkstück-
kanten DIN ISO 13715
-0,3
+0,3
DIN ISO 1302
Maßstab
Revision
Status
Artikelnummer
AATAlber Antriebstechnik GmbH
Reihe 3
17.05.2019 Kramer
1:2
4/4www.aat-online.de
Fax:[phone]
Tel.:[phone]
D1353
EhestetterWeg 11
A0
D-72458Albstadt
1
DIN ISO 2768-1-m / DIN ISO 2768-2-m
Rauheit Normen im Zeichnungsfeld vorrangig
Maße für Techn. Daten
Dimensions according to ISO 7176-15
a Angle of seating surface 6°
bE󰀨ective seat depth 425 mm
cE󰀨ective seat width 350 mm
d Seat height, front edge 539 mm
e Backrest angle 10°
f Backrest height 625 mm
g Distance between footrest and seating surface 420 mm
h1 Total length w. footrest min. 873 mm
h2 Total length w. footrest max. 936 mm
i Total width 519 mm
k Length folded 378 mm
l Width folded 519 mm
m Height folded 1151 mm
n Angle of footrest to seating surface 5°
o Distance of armrest to seat 121 mm
Minimum turning radius Approx. 950 mm

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4.10 Scope of delivery
Charger incl. instructions
Battery pack with charging electronics and safety lock
Seating/handle unit
Climbing unit
4.11 Accessories
+ 15 mm
Headrest
Charging cable for vehicle
Armrests, widened
Shoulder harness incl. lap belt
Lap belt
Climbing height extension
NOTE - Only use AAT Alber Antriebstechnik GmbH accessories.
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5 Assembly
5.1 Seating/handle unit
WARNING - The seating/handle unit must be securely xed with the locking screw so that it is
safely joined to the climbing unit!
WARNING - The climbing unit mount may only be adjusted by the manufacturer, the AAT eld
service or an authorised specialist dealer!
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A 9-pin sub-D coupling in the receptacle provides the electrical connection.
Connect the seating/handle
unit and the climbing unit.
» The mount must be aligned
parallel to the housing.
Secure the connection with
the locking knob for the stan-
chion tube .
Both units must have been
securely joined.
Place the stanchion tube of
the seating/handle unit
on the mount of the climbing
unit.
» The seating surface must
face forwards.
5.2 Battery pack
WARNING - The battery pack must be xed and locked to prevent immediate detachment!
Installation. Insert the bat-
tery pack into the opening
provided in the climbing unit.
» The battery locking device
is activated automatically.
Disassembly. Release the
locking device.
» Press the release button
on the climbing unit down-
wards, then pull out the bat-
tery pack.

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5.3 Inserting the armrests
Insert the armrests on
both sides. The locking pins
must have been fully inserted
into the groove of the hinge.
5.4 Mounting the headrest (optional accessory)
CAUTION - Position the headrest at the level of the back of the head to prevent the head from
falling backwards!
CAUTION - Pay attention to the pinch point at the groove opening to avoid injuries!
First adjust the handle unit to
the desired height (refer to
chapter 7.1).
Loosen the locking knob of
the headrest.
Insert the "slot stone" of the
headrest diagonally into the
groove opening of the sup-
port tube.
Attach the headrest to the
support tube.
Adjust the height of the head-
rest to the height of the occu-
pant's head.
Important information about using the armrests
The armrests serve as lateral restraints and may be used as a
support for the arms by the occupant.
» Do not load more than 90 kg per side.
» Do not load the armrests only on one side (risk of tipping over).
» Never sit on the armrests.
» Do not attach any objects to the armrests (e.g. bags).
» Check that the armrests are correctly seated before use.
» The occupant's arms must not protrude over the armrests!
» Do not remove the armrests during stair travel.
Tighten the locking screw.
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6 Unfolding and folding
DANGER - Lock the seating/handle unit because otherwise it can move instantly.
WARNING - Watch out for pinch points when folding and unfolding!
Pull the seat cushion against
the backrest cushion.
» At the same time, pull the
release button upwards.
Fold the seating unit down-
wards you hear it snap into
place.
6.2 Folding the seating/handle unit
6.1 Unfolding the seating/handle unit
Press the release lever in
the direction of the backrest
cushion and fold the seating
unit upwards.
Press the seat cushion
against the backrest cush-
ion until you hear it snap into
place.
iBefore folding, remove the armrests and fold in the footrest.
Fold out the footrest .
» If necessary, loosen the
locking screw and adjust
the height of the footrest.

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7.1 Adjusting the handles to the correct height
iNOTE - To avoid malfunctions or defects, store the s-max sella in a frost-free environment for at
least one hour prior to start-up.
iNOTE - Press UP/DOWN switch only a few seconds after switching on!
7 Starting up
WARNING - The handle must have been securely xed with the locking screw so that the han-
dle adjustment does not change directly!
CAUTION - Watch out for the pinch point at the groove opening to avoid injuries!
Turn the locking screw for the
height adjustment coun-
terclockwise and pull out the
handle to shoulder height.
Tighten the locking screw
clockwise.
Turn the locking screw for
transverse adjustment coun-
terclockwise.
Move the handle in the de-
sired direction.
Tighten the locking screw
clockwise.
In the case of very narrow staircases or spiral stairs, the handle might hit the wall. In these cases, adjust
the handle in the transverse direction.
Transverse adjustment of handle

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7.3 Neutral position
Move the climbing leg to
neutral position by keeping
the UP/DOWN switch
pressed.
» If the single-step mode
(refer to chapter 7.5) has
been activated, the climbing
leg is automatically stopped
in neutral position!
Correct. Incorrect!
Insert the safety chip for the
immobiliser .
» The safety chip must snap
in!
Switch the s-max sella on via
the ON/OFF switch .
7.2 Switching on the device