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11
3.2 Safety instructions
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The twion wheels must be switched off before being attached to the wheelchair, when removing them from the wheelchair and before
starting work on the wheelchair or directly on the wheels.
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For safety reasons you need to activate the parking brakes of your wheelchair, especially on uphill and downhill slopes, to avoid the
wheelchair inadvertently rolling away.
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In the (unlikely) event of the battery overheating or catching on fire, you must ensure that the battery does not come into contact with
water or other liquids. The only suitable extinguishing agent that is recommended by the battery manufacturers is sand.
Before using the device:
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The twion must only be attached to push rim wheelchairs that have been approved by Ulrich Alber GmbH for this device.
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The bracket holding the twion in place may only be installed and modified by Ulrich Alber GmbH or an Alber authorised specialist
dealer.
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When using the twion, always strictly adhere to the operating instructions of the wheelchair.
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Driving the wheelchair without an attached pair of anti-tippers is not permitted.
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Attach the original anti-tippers of the wheelchair manufacturer or the optional Alber anti-tippers to your wheelchair.
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Before every journey, check the twion wheels. If the tyres have reached their wear limit (you can no longer see the tread), the twion
must not be used.
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Before every journey, check that your wheelchair parking brakes are working correctly. You cannot drive the wheelchair without your
parking brakes working correctly.
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Check the air pressure of the twion wheels at regular intervals. For details on the correct air pressure, see the outside of the tyres and
the table in chapter 11. Please check the air pressure of the front wheels in accordance with the instructions and specifications of the
wheelchair manufacturer. Too low an air pressure can greatly affect the driving behaviour and the range.
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Both twion wheels should always have the same air pressure.
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Both front wheels of the wheelchair should always have the same air pressure.
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Before every journey, check the correct fitting of the twion wheels in the two wheel receivers of your wheelchair.
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The twion must not be used in combination with a wheelchair puller or hand bike. Even if the twion drives are switched off, there is a
risk of the electronic system sustaining damage from the current induced by the fast rotation of the wheel.
When using the twion, observe the following:
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Before using the twion to drive up or down a slope, practice operating the device on level ground.
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The maximum permissible slope specified by the wheelchair manufacturer must not be exceeded.
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Approach steps or drops extremely cautiously.
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While the twion is switched on, each actuation of the push rims is converted into a drive command. When stopping or waiting in poten-
tially dangerous positions (e.g. while waiting at a traffic light, on uphill and downhill slopes or ramps of any type), do not touch the
push rims and secure your wheelchair using its parking brakes.
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Never reach into the wheel when the twion is switched on.
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Do not insert or throw objects of any kind into a switched on or off twion wheel.
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Never attach objects of any kind to the push rims. These could induce involuntary drive impulses.
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When driving on pavements, keep a safe distance (preferably the width of the wheelchair) from the kerb.
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Avoid using the wheelchair on soft ground (e.g. loose chipping, sand, mud, snow, ice or deep puddles).
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Never leave the twion unattended, even if it is switched off.
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The twion may be adversely affected by strong electromagnetic fields, particularly in the vicinity of the push rim sensor.
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Conversely, the twion may interfere with other electrical equipment such as anti-shoplifting barriers in department stores.
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You must not use the twion on escalators or moving walkways.
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When travelling, do not suddenly change the direction of travel to left or right at maximum speed as this could cause the wheelchair to
tip sideways.
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Reduce your speed when going round a corner.
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If you intend to stop in your wheelchair on an uphill or downhill slope, your wheelchair must be parked across this slope and the park-
ing brakes activated.
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After every trip or when your wheelchair is idle, activate the parking brakes to prevent the chair inadvertently rolling away.
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Do not travel across downhill slopes.
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Do not reach into the spokes of the twion wheels when travelling, or into the front wheels of your wheelchair.
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Apply your twion brake carefully and adapt your speed accordingly (i.e. not suddenly).
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When travelling in a vehicle, only sit in the vehicle’s installed seats with associated restraint systems. Not complying with this guideline
runs the risk of you and your co-passengers being injured in an accident.
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When travelling by vehicle, secure your wheelchair and the twion wheels according to the current applicable statutory requirements and
legislation.
