Lehner Lifttechnik DELTA Instruction Manual

Delta | User handbook Version 07/2022
User handbook
Platform stairlift „Delta“
Edition: July 2022
Version 1.01
Lehner Lifttechnik GmbH
Salling 8
4724 Neukirchen am Walde
Austria
Tel: [phone]
E-Mail: [e-mail]
Web: www.lehner-lifttechnik.at

Delta | User handbook Version 07/2022
CONTENTS
1Introduction.......................................................................................................................................................... 1
2Attention –Safety first...................................................................................................................................... 2
2.1 Key Symbols used in this handbook................................................................................................... 2
2.2 Operator of the Delta stairlift................................................................................................................ 3
2.3 User group ................................................................................................................................................. 3
2.4 Installation area......................................................................................................................................... 3
2.5 Qualified workers ..................................................................................................................................... 3
2.6 Decommissioning..................................................................................................................................... 3
2.7 Duty cycle................................................................................................................................................... 3
2.8 Keys.............................................................................................................................................................. 3
2.9 Intended use.............................................................................................................................................. 4
2.9.1 Safety instructions................................................................................................................................ 4
2.1 Use of the platform stairlift.................................................................................................................... 5
2.2 General Layout.......................................................................................................................................... 6
2.3 Platform........................................................................................................................................................7
2.4 Technical details ....................................................................................................................................... 8
3Overview of the functions of the Delta ....................................................................................................... 9
3.1 Safety devices............................................................................................................................................ 9
3.1.1 Platform barriers and ramps............................................................................................................. 9
3.1.2 Safety bottom....................................................................................................................................... 9
3.1.3 Lateral contact bars............................................................................................................................. 9
3.1.4 Overload device................................................................................................................................... 9
3.1.5 Emergency stop ................................................................................................................................... 9
3.1.6 Alarm button......................................................................................................................................... 9
3.1.7 Overspeed governor and safety gear............................................................................................ 9
4Operation ...........................................................................................................................................................10
4.1 Main power switch..................................................................................................................................10
4.2 Operating elements on the platform.................................................................................................10
4.3 Using the remote control.......................................................................................................................11
5Battery charge system.....................................................................................................................................13

Delta | User handbook Version 07/2022
5.1 The beeper................................................................................................................................................13
6Operating the platform...................................................................................................................................14
6.1 Calling the platform................................................................................................................................14
6.2 Driving onto the platform.....................................................................................................................14
6.3 Driving with the platform......................................................................................................................15
6.4 Leaving the platform..............................................................................................................................15
7Troubleshooting ...............................................................................................................................................16
7.1 General.......................................................................................................................................................16
7.2 Status messages on the display ..........................................................................................................17
8Rescue of passengers.....................................................................................................................................20
8.1 Case 1: The occupied platform is near a stop position................................................................20
8.2 Case 2: The occupied platform is not close to a stop position..................................................21
8.2.1 Emergency unclamping of barriers ..............................................................................................23
9Control and maintenance .............................................................................................................................24
9.1 Security checks........................................................................................................................................24
9.2 Cleaning....................................................................................................................................................24
10 Maintenance..................................................................................................................................................... 25
10.1 Review .......................................................................................................................................................25
10.2 Maintenance instructions..................................................................................................................... 25
10.2.1 Platform controls...........................................................................................................................25
10.2.2 Mechanics of the platform barriers, the ramps and the platform motor...................... 26
10.2.3 Safety bottom and contact bars ............................................................................................... 26
10.2.4 Guide rails / rack ...........................................................................................................................26
10.2.5 Trolley wheels.................................................................................................................................26
10.2.6 Fastening the rail and the support........................................................................................... 26
10.2.7 Safety gear / Overspeed governor.......................................................................................... 26
10.2.8 Mechanical switches.....................................................................................................................26
10.2.9 Gearbox and drive motor........................................................................................................... 27
10.2.10 Signalling devices.......................................................................................................................... 27
10.2.11 Documents / Emergency release key...................................................................................... 27
10.3 Lubricants and operating materials, spare parts........................................................................... 27
10.3.1 Lubricants and operating materials ......................................................................................... 27

Delta | User handbook Version 07/2022
10.3.2 Spare parts...................................................................................................................................... 27
11 Installation..........................................................................................................................................................28
11.1 Electrical works........................................................................................................................................28
11.2 Mechanical installation..........................................................................................................................28
11.3 Dismantling..............................................................................................................................................28
12 Declaration of conformity .............................................................................................................................29
13 Duties of the operator....................................................................................................................................30
14 Requirements for the maintenance company..........................................................................................31
15 Installation and maintenance notes ...........................................................................................................32

Delta | User handbook Version 07/2022 page 1
1INTRODUCTION
First of all, we would like to congratulate you on your purchase of a stair lift from Lehner Lifttechnik
GmbH and welcome you to our large circle of satisfied customers. For more than 30 years, our lifts
have been known as reliable means of transport, which are characterised by individual adaptation
to structural conditions.
The Delta stairlift represents a new generation of platform stairlifts with technology that has been
tried and tested over many years. The unit has been built in accordance with the currently valid
European safety regulations.
As with any equipment that operates under load and whose parts are in motion, the
utmost attention is required. Please read this user manual carefully. Make sure that every
user of the lift has read and understood the user manual before using the lift. You will
find instructions on how to operate the lift as well as safety instructions.
By using this manual, you will benefit from Lehner Lifttechnik’s many years of experience in the
operation of stairlifts. Proper care of the system on your part as well as scheduled maintenance by
a competent company will provide you with a reliable lift system for a long period of time.
Lehner Lifttechnik GmbH and our authorised partner companies offer you a comprehensive
maintenance programme specially adapted to the operation of your system. Take advantage of the
manufacturer's experience to achieve the highest possible efficiency from your stairlift system.
Keep this instruction manual for future reference.
Lehner Lifttechnik GmbH expressly disclaims all liability for breakdowns caused by disregard of these
instructions, non-compliance with the safety instructions or incorrect handling. If such breakdowns
have to be repaired by our personnel, this will also be invoiced within the warranty period.
We wish you much pleasure with the Delta platform stairlift!

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2ATTENTION –SAFETY FIRST
This manual also contains instructions for emergencies. Therefore, it must be ensured that this
manual is always available at the installation and kept accessible to the operator, elevator attendant,
rescue, and maintenance personnel.
Please pay careful attention to the next points/instructions:
2.1 Key Symbols used in this handbook
Pay attention to all paragraphs marked with this sign. These paragraphs contain
important hints that will insure flawless operation of the lift.
Warning: In the case of text passages with this sign, failure to observe the procedure
indicated may lead to dangerous situations, causing personal injury or damage to
property. Therefore, read these points with special care.
Pay attention! Do not execute the actions marked with this sign! Failure to observe
this warning will result in immediate increased danger and personal injury or damage
to property may occur.
All photos shown in this handbook or pictures are symbolic and can differ from
reality.
Photo

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2.2 Operator of the Delta stairlift
At least one responsible person must be appointed for each stair lift; this person must be easily
accessible during the operating time of the installation. The installation must be maintained in a safe
condition. If the installation is found to be unsafe, it must be taken out of service immediately;
accidents must be reported immediately to the expert (lift inspector) or the manufacturer. The
person in charge must ensure on a weekly basis that there are no defects that are obviously
dangerous to operation and that the tasks listed in the chapter "Duties of the stairlift operator" are
carefully performed.
2.3 User group
Only specially instructed persons are to use the Delta stairlift and must take responsibility for all
others who are present.
Users who are not able to fulfil these requests, as well as children, need an attendant person who
takes responsibility over the user.
2.4 Installation area
Delta lifts can be mounted on staircases and ramps. The lift, however, is not designed for use in
unusual areas (like areas in danger of explosion, areas surrounded by aggressive chemical
substances, …). Outdoor use is possible, but the parts must remain clear of ice and snow in winter.
2.5 Qualified workers
Installation, maintenance, repairs, and checks must be carried out by qualified persons, preferably
by partner companies authorized by Lehner Lifttechnik.
2.6 Decommissioning
If the system is taken out of operation for cleaning, maintenance, or repair work, it must be protected
against unintentional movements. The key switches on the controls must be switched off and the
keys removed.
2.7 Duty cycle
The Delta stairlift was constructed for being 4 minutes in motion per 10 minutes. In case that the
stairlift is permanently in operation, the motor could get too warm and become defective.
2.8 Keys
Keys should be kept in a safe place, away from those who are not to use the lift. Remove the key
from the control when it is not in use.

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2.9 Intended use
2.9.1 Safety instructions
Please note the following points for correct use:
•The Delta stairlift is designed exclusively for transporting a person in a wheelchair or
seated on a designated seat.
•Never ride standing on the platform (risk of injury to the head, risk of falling).
•The stair lift is not intended for transporting loads.
•Always lock the lift so that children cannot use it.
•Adhere to the specified maximum loads and observe the available platform size.
•Observe the instructions attached to the lift.
•Observe the following points for correct use.
•Passers-by going up or down the stairs must avoid any contact with the platform.
Stairlift users must always be aware of pedestrians or other obstacles.
•Do not use the platform lift in case of fire! There could be a power failure during the
ride and the user would be trapped.
•Never exceed the permissible payload. The payload is indicated on the platform
control panel.
•Never bring your hands or loose clothing near the ride rail or the back wall of the
platform when the lift is in motion. Passengers must remain in the wheelchair or seat
throughout the ride.
•Do not open the barriers by force.
•Do not disable any safety device by making mechanical or electrical changes to the
system. All types of adjustments and/or modifications to the installation are
prohibited without the written consent of Lehner Lifttechnik.
•The stairlift may only be used by one person at a time. Accompanying persons are
not allowed to ride on the stairlift under any circumstances. Otherwise there is a risk
of falling.
Preventive checks and regular maintenance of the installation are highly recommended and will
guarantee you long-term, safe operation. Report anything unusual to your service technician. Do
not use the lift in case of irregularities, unusual noises and vibrations - call the service immediately.
All instructions and advice from experts, fitters and service personnel must be followed.

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2.1 Use of the platform stairlift
The platform lift may only be used if it is in technically perfect condition. Any malfunction that could
affect safety must be avoided or eliminated.
Inform your service technician of anything unusual. Do not use the platform lift in the event of
irregularities or unusual noises - call the service agent immediately.
Before entering the up or down command, make sure that no one will be endangered
by the movement of the system. Always look in the direction of travel!
Goods may only be transported if sufficient stability is ensured so that they cannot slip or fall over.
Keep the keys in a safe place and do not give them to unauthorised persons. Do not leave the keys
on the call points when the stage is not in use.

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2.2 General Layout
Lateral safety contact
Barrier arms
Pillars
Upper release curve
Charging ramp
and stop
Platform side panel
Access ramp

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2.3 Platform
Right ramp
Left ramp
Barrier
Safety belt
Platform
Handle
Barriers cover
Sidewall cover
Foldable seat
Ramp linkage
Ramp recess
Front cover plate
Barrier arm
Cover iron bar
Cover electric
motor
Upper landing gear
Cover lower landing gear
Overspeed device
Gearbox

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2.4 Technical details
Feature
Detail
Railway
Gradients 15...45°
Length up to 30 m
Speed
appr. 0,1 m/s
Power
0.5 kW
Voltage
24V DC
1 x 230 V for recharger
Position of drive
Inside carriage
Site
Indoors or outdoors
Tolerable temperatures
-15°C to +45°C
Carriage model
Platform for wheelchairs
Optional with folding seat
Platform size
standard 700 x 750 mm
Standard 750 x 850 mm
standard 800 x 900 mm
standard 800 x 1000 mm
Optional special sizes
Load capacity
Standard 225 kg
Optional 300 kg
Surface protection of lift
Powder coated
Drive rails
Aluminium
Optional steel or stainless steel
Noise
< 70 dB(A)

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3OVERVIEW OF THE FUNCTIONS OF THE DELTA
3.1 Safety devices
The Delta platform lift is equipped with the following safety devices:
3.1.1 Platform barriers and ramps
The barriers and ramps, which must be closed (horizontally) or folded up during the drive, prevent
a fall forward or backward. These always open automatically at the stops if the travel command is
pressed.
3.1.2 Safety bottom
The safety bottom is attached to the underside of the platform and serves as additional safety. It
reacts to pressure so that the system stops immediately if the safety bottom hits an obstacle. The
travel command in upward direction remains active.
3.1.3 Lateral contact bars
Contact bars are fitted to the side of the platform wall to prevent jamming in the direction of travel.
The travel command in the opposite direction remains active.
3.1.4 Overload device
The platform is equipped with an overload device. If the load capacity indicated on the type plate is
exceeded by more than 25%, an overload switch switches off the system and an acoustic signal
sounds as well as the overload indicator on the platform display. In this condition, it is not possible
to drive on.
The platform must never be overloaded. If an overload is signalled, the loading must be
reduced immediately.
3.1.5 Emergency stop
The Delta platform lift is equipped with an emergency stop button. If you need to stop the platform
in an emergency, press the red button and the lift stops. Unlocking is done by pressing it again or
turning it clockwise.
3.1.6 Alarm button
The platform is equipped with an alarm button to summon help. By pressing the alarm button, a
loud emergency signal sounds.
3.1.7 Overspeed governor and safety gear
The Delta platform lift is equipped with a speed limiter and a safety catch. If the platform moves
downwards at an increased speed (e.g., due to a defect or similar), the increased speed is
immediately detected by the overspeed governor and the safety gear is triggered. The safety gear
brings the platform to a standstill by holding it on the rails. This prevents the platform from falling.

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4OPERATION
4.1 Main power switch
The main power switch is located at the left side wall of the carriage and connects
the plant to the batteries. For use of the lift, first turn on the main power switch. By
switching off the main power switch, the lift cannot be used anymore (also not
through the wall controls). If the main power switch and the key switch are switched
on, the green lamp on top of the carriage is shining.
After the main power switch is turned off, the recharger is still under voltage. Before work
is done to the stairlift the power supply to the customer provided distribution box has to
be interrupted.
Before operating the lift, ensure that the platform area is clear.
4.2 Operating elements on the platform
The platform is equipped with a handheld controller on the spiral cable as standard. This allows an
ergonomic sitting position while operating the platform.
On the handset are the travel buttons, an emergency stops and an audio alarm button. The handset
is only used to drive the open platform and to open and close the barriers.
Alternatively, or additionally, operating elements can also be attached at the top of the platform side
wall.

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4.3 Using the remote control
The remote controls must be activated with the key switch before operation of
the lift.
The remote control is used for calling and sending the platform as well as for
folding and unfolding it.
A green light is flashing by correct use. The remote control is working with 9 V
batteries. The battery life is approx. 1 year.
Green LED
Key
FOLDING the platform
This command is also working if the
platform is not in station.
UNFOLD the platform
This command is only working if the
platform is in a station.
Drive DOWN
Only possible if the platform is folded. The
platform can be sent down.
Drive UP
Only possible if the platform is folded. The
platform can be sent up.

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The status of the radio cassette can be read from the LED:
LED light
Description
Green glow
Radio connection available and travel command active
Orange glow
Radio connection present and lift does not move
Possible reasons:
•e.g.: The lift is already at the top landing when the Up button
is pressed.
•Safety circuit interrupted
Red glow
Radio connection available, but the lift is occupied. Lift is operated
from the platform or from another call station.
Green blinking
Radio transmitter has been successfully registered with the receiver
Orange blinking
Radio connection interrupted
Red blinking
The battery of the radio transmitter is weak and should be replaced.

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5BATTERY CHARGE SYSTEM
The motor of the Delta stairlift is powered by batteries, which are reloaded by a charger. The
recharging occurs in the upper and lower stop positions by recharge contacts. As a consequence, if
the Delta is not in use, it is important that it is parked in the stop positions.
To avoid an unintentional parking outside of the stop position an acoustic warn signal is installed.
5.1 The beeper
If the platform is not in the stop position after 5 minutes after use, the beeper gives signals
every second. If so, please bring the platform in the stop positions.
If the lift is parked in the stop position and the beeper still gives signals, the recharge
does not work. In this case, please turn off the main power switch of the lift and check if
there are power outs in the building or if a fuse is not working properly. If any such errors
are corrected and the beeper is still giving signals, please contact the service company. It
is possible that either the batteries or the recharger is defect.
If the battery voltage is too weak for normal drive operation, the beeper gives signals
every 2.5 seconds. In this case, please bring the carriage in the stop position to recharge
the batteries. If the signal does not stop after recharging, the batteries might be defect
and have to be changed by the service company. In the case of weak batteries, the
electrical control system is programmed in a way that the carriage always reaches the
lower stop position with the remaining battery voltage.

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6OPERATING THE PLATFORM
The Delta stairlift is safe and easy to use. The operation is adapted to the disabled user in the best
possible way.
Please refer to the schematic drawings above for a better understanding of the described stairlift
parts.
6.1 Calling the platform
The installations with automatic platform are equipped with call stations with which the lift can be
called and sent, and the platform can be opened and closed. The call stations are in the area of the
stops.
If the platform is not at the stop you are at, it can be called from the call station if it is folded:
Switch on the call station by inserting the key and turning it. The green lamp now lights up. Press
the drive command button "Up" or "Down", the platform will drive in the corresponding direction as
long as the button remains pressed.
When a travel command switch is pressed, the platform moves in the corresponding direction as
long as the button remains pressed.
The lift can only be controlled from the stops when the platform is folded up. If the
platform is folded down, please first press the FOLDING button and completely fold up
the platform.
The vehicle stops automatically at the landing stations. To get on, the platform is folded down by
pressing the "UNFOLD" button on the call point. The button is held until the platform is horizontal
and the barrier has opened completely.
Switch the call station off again by turning the key to the "OFF" position and removing it.
6.2 Driving onto the platform
If the platform and the barrier are open as described in the previous point, you can drive onto the
platform. The wheelchair must be braked before traveling with the platform.
Always look in the direction of travel while driving and brake the wheelchair!

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6.3 Driving with the platform
On the platform there is the handset control on a spiral cable with the drive command buttons, as
well as an audio alarm button and an emergency stop button.
If the passenger is on the vehicle as instructed, the drive command can be given by pressing the
travel command switch for the desired direction.
As soon as you press the desired driving direction with the drive command switch, the folding barrier
closes automatically and the drive-up ramp folds up. After the barrier is closed and locked, the
platform starts moving in the desired direction.
Hold the drive command button until you reach the desired stop.
The platform stops automatically at the stop and the folding barrier is opened if the drive command
button remains pressed.
The stairlift will also stop if the access ramps hit an obstacle.
If you release the drive command switch while driving, the vehicle stops immediately. If the vehicle
does not stop when the drive command switch is released, an emergency stop (red button) has
been installed for additional safety. If this emergency stop is pressed, the system stops immediately.
The emergency stop button is unlocked again by pressing it again or turning it clockwise.
6.4 Leaving the platform
The lift stops automatically at the desired stop. By constantly pressing the drive command switch,
the barrier arm opens and the drive-up ramp lowers. When the barrier arm is fully open, the drive
command switch must be released.
You can now leave the platform.
After leaving the platform, you have to activate the call station in your landing station by inserting
and turning the key. Press the "FOLD" operating button until the platform and the folding barrier
are completely folded. Switch the call point off again by turning the key to the "OFF" position and
removing it.
The platform has to be folded to release the stairlift for other users.
Thus, the call station become active again and the lift can be sent or called to a desired location.
To prevent unauthorised use of the lift, you should always remove the key switch in the
call stations after using the lift.