User Manual · LAPLAB.000.002-R15 · October 2025

Lift Assist Classic User Manual

Everything in the printed manual, as one page: safety, setup, placing it on your chair, the remote control, sitting down and standing up, care, troubleshooting, specifications and warranty.

Download PDF manual7.1 MB

Cover of the printed Lift Assist Classic user manual

Welcome to your Lift Assist Classic.This page is the complete user manual. Read the Safety chapter before first use, then follow Using the Lift Assist Classic: setup, placing it on your chair, the remote control, sitting down and standing up. Use the chapter bar above to jump, or search for any word.

Chapter 1

Introduction

About this manual

This manual provides the information necessary to operate the Lift Assist Classic – Portable Smart Rising Seat in a safe and efficient manner. Please review and understand this manual before operating the system. If any part of this manual is unclear, contact your supplier or SitnStand Customer Support for clarification.

SitnStand product overview

Lift Assist Classic – Portable Smart Rising Seat is a lightweight, portable inflatable system that is safe, simple and easy to operate. It comprises an electronic control system, multiple air valves, multiple air sealed layers, and a portable air pump that supplies the required pressure and air capacity to assist standing up and sitting down with minimum or no help required.

Lift Assist Classic parts: battery and air supply unit, rear area, back rest area and seating area, shown flat and placed on an armchair from the front and the back — Figure 1

1 SitnStand unit
1 Li-ion 14.4 VDC rechargeable battery
1 wall battery charger with 1 m cable and connector
1 user manual

Warnings, cautions and notes

Three types of special messages appear in this user manual:

WARNING indicates the possibility of injury to the patient or operator.

CAUTION indicates a condition that may lead to equipment malfunction.

NOTE provides other important information.

Conditions for use

Intended use

The Lift Assist Classic is a powered inflatable cushion intended for assisting patients suffering from mobility difficulties in rising from a seated position to standing, as well as in sitting down from a standing position. The Lift Assist Classic is intended to be used with any decent seating area.

Lift Assist Classic is intended to be used in the homecare environment while performing daily activities, as well as in medical care facilities.

Intended users

The Lift Assist Classic is intended to be used by elderly people and/or people with compromised mobility or difficulties.

The Lift Assist Classic is intended to be used by people with chronic or acute mobility difficulty.

Contraindications

Do not use the Lift Assist Classic while under the influence of narcotics or alcohol.
Do not use the Lift Assist Classic while holding a child or infant.
Do not use the Lift Assist Classic inside a car.
Do not use the Lift Assist Classic without clothing.
In the case of cognitive impairment, use the Lift Assist Classic only by a caregiver.

Chapter 2

Safety

General warnings and cautions

WARNING: DO NOT USE BEFORE READING AND UNDERSTANDING THIS MANUAL.

WARNING: To avoid the potential of electrical shock, use only the designated charger provided with the device. Using any other charger may cause an electrical and/or electromagnetic hazard.

WARNING: To avoid the potential of electric shock, the power supply must be disconnected from the power mains prior to cleaning.

WARNING: To avoid the potential of electric shock, contact your seller or SitnStand when a malfunction occurs.

WARNING: Do not inflate under the bottom of a table or other item that interferes with the cushion inflation.

NOTE: The only user-serviceable component in the system is the battery.

CAUTION: Changes or modifications not expressly approved by SitnStand can affect the safety and effectiveness of the system, and will invalidate the system's warranty.

CAUTION: Do not operate with damaged cords or plugs. If damaged, please contact the company.

CAUTION: At the end of its useful life, the system and battery must be disposed of in accordance with local law and/or code concerning electrical and electronic equipment.

Chapter 3

Labels and symbols

MDMedical Device

SNSerial Number

REFCatalog Number

User Manual

Keep Dry

Manufactured by

Not for general waste. Special requirements for Waste of Electrical and Electronic Equipment (WEEE Directive)

Caution

Information

CECE Mark

EC REPAuthorized Representative

Chapter 4

Using the Lift Assist Classic

Setup On your chair Remote control Sitting down and standing up Battery

4.1 Setup instructions

Setting up the Lift Assist Classic is performed by the user. The setting up process consists of three steps:

Charging the battery for the first time.
Placing the Lift Assist Classic on an appropriate seat.
Connecting the battery.

A. Charging the battery for the first time

Charge the battery for at least 12 hours before use:

Remove the battery from the box.
Plug the battery charger into an electric wall socket.
Connect the battery charger connector to the battery charging socket.
When the green light is on, the battery is fully charged.
When the red light is on, the battery is not fully charged.

NOTE: To prevent falling over any tangled cable, place the battery close to the charger.

The battery, the charger with its cable, and a wall socket — Figure 2

B. Placing the Lift Assist Classic on a suitable seat

Selection of an appropriate seat. When selecting the seat on which the Lift Assist Classic will be fitted, it is advisable to select a seat that is steady, stable and cannot be easily moved. An armchair is preferable.

An appropriate seat size for the Lift Assist Classic should be at least the minimum size of the Lift Assist Classic seating area in its deflated state, with at least one arm rest.

Following the appropriate seat selection

Place the seating area of the Lift Assist Classic directly onto the chair seat.

In most cases the Lift Assist Classic seat and backrest area should be placed in perfect alignment with the seating area of the seat itself, as illustrated in Figure 3; however, in some cases the location can be adjusted differently.

The rear area of the Lift Assist Classic should be laid over the rear area of the chair, as illustrated in Figure 3.

Placing a standard back pillow between the Lift Assist Classic backrest area and the chair backrest is an option.

The Lift Assist Classic on an armchair: the seating and back rest areas on the front, the rear area and the battery and air supply unit hanging over the back — Figure 3

C. Placing the battery in its place

Slide the charged battery into its place within the air supply unit, as illustrated in Figure 4.

The Lift Assist Classic is now in standby mode, and is ready for use.

The battery sliding into the air supply unit through the open zipper — Figure 4

4.2 Controller indicator modes

Standby modeThe green light flashes slowly (about one flash per second). The Lift Assist Classic is ready for use and is waiting for your action.

Working modeThe green light flashes quickly (about 5 times a second). The Lift Assist Classic is operating; while in this mode, the buttons will not respond.

Charge batteryThe orange light is on while the standby/working green light is also flashing, as described above. The battery needs recharging.

Charge battery (depleted)The orange light is on and the standby/working green light is off. The battery is depleted; in this case the Lift Assist Classic cushion can only be deflated.

ErrorThe red and green lights flash quickly. The Lift Assist Classic has identified a system fault. See the Troubleshooting chapter.

The remote control with its three indicator lights and the up and down buttons — Figure 5 · the remote control

4.3 Sitting down

To sit down, inflate the cushion using the controller to 1, 2, 3 or 4 layers (whichever is most comfortable for you), then sit down on the pillow facing forward.

When you feel steady, start deflating the cushion by pressing the Down Arrow button on the controller.

4.4 Standing up

To stand up, first disconnect your upper back from the Lift Assist Classic backrest area, and only then start inflating the cushion one layer at a time by pressing the Up Arrow button on the controller.

The Lift Assist Classic has 4 layers; however, inflation can be stopped at any time when the level of elevation is sufficient.

Important: Do not attempt to stand up before the layer is totally inflated and there is no sound from the air pump.

The Lift Assist Classic may remain inflated until the next time it is used for sitting down.

4.5 Replacing the battery

When the Charge Battery indicator turns orange, the battery should be charged.

Open the zipper covering the air supply unit and remove the battery by sliding it towards you, as illustrated in Figure 6.

The battery is connected by a magnet to the air supply unit.

NOTE: Don't remove the battery while the Lift Assist Classic is in Working Mode (see controller indicator modes).

Removing the battery from the air supply unit through the open zipper — Figure 6

4.6 Charging the battery

Plug the battery charger into an electric wall socket.
Connect the battery charger connector to the battery charging socket.
When the red light on the charger changes to green, the battery is fully charged.
When the red light is on, the battery is not fully charged.

Chapter 5

Maintenance

In order to maintain the Lift Assist Classic system, please note the following:

Keep the Lift Assist Classic away from dust or dirt.
Use a soft dry brush to clean the fabric surfaces (e.g. seat area).
Do not iron the fabric surface.
Use a damp cloth to clean the plastic surfaces (e.g. air supply unit).
Do not use solvents or detergents to clean any part.
Do not allow liquids near the system openings.
Keep dry.

WARNING: To avoid potential of electrical shock, the power supply must be disconnected from the power mains prior to cleaning.

WARNING: To avoid the potential of electric shock, contact your seller or SitnStand when a malfunction occurs.

NOTE: The only user-serviceable component in the system is the battery.

NOTE: No portion of the system should be immersed in water or other fluids.

NOTE: Never spray or otherwise apply any detergent fluid directly into the openings or seams of the system. Always apply the detergent fluid to the cloth instead.

Chapter 6

Troubleshooting

Before addressing the troubleshooting table, please check and confirm the following:

The battery is attached to the Lift Assist Classic.
The battery is charged (low battery indicator is off, standby/ready indicator is on).

Basic troubleshooting

When addressing a malfunction, as an initial action please follow Step 1 described in the table below. In case of an unsolved malfunction, follow Step 2.

MalfunctionStep 1Step 2

Battery not chargingStep 1Charge the batteryStep 2Contact your seller or Life Assistant LTD (SitnStand)

No light on the controllerStep 1Charge the batteryStep 2Contact your seller or Life Assistant LTD (SitnStand)

Product is not working when pressing the controllerStep 1Charge the batteryStep 2Contact your seller or Life Assistant LTD (SitnStand)

Does not deflateStep 1Charge the batteryStep 2Contact your seller or Life Assistant LTD (SitnStand)

Does not inflateStep 1Charge the batteryStep 2Contact your seller or Life Assistant LTD (SitnStand)

Air leakingStep 1Contact your seller or Life Assistant LTD (SitnStand)

Red triangle light and the green light on the controller are flashingStep 1Press the two remote control buttons (up and down arrows) simultaneously for 10 seconds to reset the systemStep 2Contact your seller or Life Assistant LTD (SitnStand)

For more information

Life Assistant LTD (SitnStand)
6 HaParsa St. Afula, 1829306 ISRAEL
email: info@sitnstand.com
web: www.sitnstand.com

NOTE: If you experience any unusual symptoms, discomfort, or difficulties while using the device, stop using it and consult a healthcare professional.

Any serious incident (i.e. major injury) that has occurred in relation to the device should be reported to the manufacturer and to the competent authority of the Member State in which the user is established.

Chapter 7

Operating specifications

NOTE: Unless otherwise indicated, all specifications are subject to change without notice. Specifications and test methods will be made available upon request.

7.1 Environmental

Transport and storage environment

Temperature range−25 °C to +70 °C (−13 °F to 158 °F)

Relative humidity rangeWithout relative humidity – 93%

Operation environmental conditions

Temperature range+5 °C to +40 °C (41 °F to 104 °F)

Relative humidity range15% to 93%, with no condensation

Atmospheric pressure700 – 1060 hPa (10.15 – 15.37 psi)

Transport altitude0 – 12,000 meters (0 – 40,000 feet)

7.2 Electrical

Battery typeLithium-Ion rechargeable, 14.4 V, 2.9 Ah

Operation voltageDC 14.4 V @ 10 A

Frequency input50 – 60 Hz

Charger input100 to 240 VAC

Charger output16 VDC, 0.5 A (8 W)

Battery life~500 charging cycles / two years under warranty that the battery should be over 80% of its capacity

CAUTION: At the end of its useful life, the system and battery must be disposed of in accordance with local law and/or code concerning electrical and electronic equipment. Do not discard to standard trash bin.

7.3 Physical and operational

Seat footprint, deflated40 × 53 × 1 cm (16 × 21 × 0.4 in)

Seat footprint, inflated40 × 48 × 20 cm (16 × 19 × 8 in)

Product weight4 kg (8.8 lbs)

Max supported weight180 kg (400 lbs)

Nominal operation time (inflate/deflate)~25 sec

Control mechanismUp / down push button ↑↓
Green LED: system ready
Orange LED: low battery
Red LED: error

Air capacity~1.7 L/sec @ 0.1 AT pressure (~3.5 CFM @ 1.4 psi)

Device lifetime~10,000 inflating cycles / 5 years

Chapter 8

Limited warranty

Life Assistant LTD (SitnStand) guarantees this product, including the battery and the textile/fabric, for a period of two years from the date of purchase.

The guarantee covers defects in materials and workmanship, comprising the system, assemblies, components and labor.

The guarantee is not valid in the case of abnormal wear and tear, willful damage, neglect, misuse or unauthorized repair or alteration of the product, or any of its parts or accessories.

The following statements do not affect the consumer's statutory rights. This product is sold on the understanding that, in the event of any defect of manufacture or material appearing within two years of the date of receipt of this product, the defect will be amended free of charge on condition that evidence of date of ownership is provided. Such evidence may be an invoice, delivery note, etc. and evidence that the defect is not attributable to accidental damage either in transit or otherwise, misuse or unauthorized repair or alteration.

Your product record

Keep these details for any warranty claim:

Product serial number

Battery serial number

Location of purchase

Date of purchase

Delivery note / invoice no.

Chapter 9

EMC statement

Electromagnetic compatibility declarations, as required for medical electrical equipment. Mainly relevant for institutions, installers and regulators.

Warnings

WARNING: Use of this equipment adjacent to or stacked with other equipment should be avoided as it may result in improper operation. If such use is necessary, this equipment and the other equipment should be observed to verify that they are operating normally.

WARNING: Use of accessories, transducers and cables other than those specified or provided by the manufacturer of this equipment may result in increased electromagnetic emissions or decreased electromagnetic immunity of this equipment, resulting in improper operation.

WARNING: Portable RF communications equipment (including peripherals such as antenna cables and external antennas) should be used no closer than 30 cm (12 inches) to any part of the Lift Assist Classic, including cables specified by the manufacturer. Otherwise, degradation of the performance of this equipment may result.

Electromagnetic emissions

Lift Assist Classic is intended for use in the electromagnetic environment specified in the following table. This is not a life-sustaining device.

The user and/or installer of the unit must ensure that it is used in such an environment.

Declaration – electromagnetic emissions
Emissions test	Compliance	Electromagnetic environment – guidance
RF emissions CISPR 11	Group 1, Class B	The Lift Assist Classic uses RF energy only for its internal function. Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment.
Harmonic emissions IEC 61000-3-2	N/A	The Lift Assist Classic is suitable for use in all establishments, including domestic establishments and those directly connected to the public low voltage power supply network that supplies buildings used for domestic purposes.
Voltage fluctuations and flicker IEC 61000-3-3:2013	Complies