Keiser AIR250 User manual

LOWER BACK
MODEL 2821XX
OPERATION MANUAL
AIR250
STRENGTH |CARDIO |FUNCTIONAL

02
AIR250 LOWER BACK OPERATION MANUAL
CONTENTS 03 — GENERAL INFORMATION
03_INTRODUCTION
03_REGISTER YOUR PURCHASE
03_SERIAL NUMBER INFORMATION
04 — IMPORTANT SAFETY INFORMATION
06 — TECHNICAL SPECIFICATIONS
06_EQUIPMENT SPECIFICATIONS
06_TECHNICAL DATA
07 — INSTALLATION AND PLACEMENT
07_TRAINING SPACE
08 — OPERATION
08_EQUIPMENT OVERVIEW
09_POWER DISPLAY
10_DISPLAY FEATURES
11_PROPER OPERATION CHECK
12_HOW TO USE THE AIR250 LOWER BACK
14_POWER TEST
15 — MAINTENANCE
15_PREVENTATIVE MAINTENANCE SCHEDULE
16_BATTERY REPLACEMENT
17_ANNUAL MAINTENANCE
18 — REGULATORY AND COMPLIANCE NOTICES
18_SAFETY NOTIFICATIONS
19_ELECTROMAGNETIC COMPATIBILITY (EMC)
19_US FCC COMPLIANCE STATEMENT
19_DISPOSAL
20 — WARRANTY STATEMENT
Keiser, the Keiser logo, and other trademarks associated with Keiser products referred to in this publication are trademarks of Keiser Corporation.
© 2020 Keiser Corporation. All rights reserved.
Distribution and copying of this document, use and communication of its contents is not permitted without written authorization from Keiser Corporation. The content
of this document is furnished for informational use only, may be subject to change without notice, and should not be construed as a commitment by Keiser Corporation.
Every effort has been made to ensure that the information in this manual is accurate. Keiser Corporation is not responsible for printing or clerical errors.

03
AIR250 LOWER BACK OPERATION MANUAL
Congratulations on the purchase of your new Keiser Air250 Lower Back machine and welcome to the Keiser family.
Keiser’s Dynamic Variable Resistance safely builds strength at any speed, which is key to building maximum power.
For your safety, and to ensure the best experience and maximum gains, it is critical that you read and understand
this manual before you begin using the Air250 Lower Back. If you have any questions regarding the operation of the
Air250 Lower Back after reading this manual, our Keiser Customer Support team will be happy to assist by telephone
at 1 559 256 8000 and via live chat at keiser.com/support (Monday—Friday, 9 am to 5 pm Pacic Time), or by email at
[e-mail].
Yours in Health,
Keiser Corporation
GENERAL INFORMATION
INTRODUCTION
Register your Air250 Lower Back machine to stay informed
of safety notications and for faster, more accurate warranty
service.
Scan the QR Code to the right to access the interactive
online warranty registration form or visit:
https://www.keiser.com/forms/warrantyregistration SCAN
REGISTER YOUR PURCHASE
SERIAL NUMBER INFORMATION
Figure 1. Serial Number Location and Information
Serial Number Location
on the Air250 Lower Back
Serial Number Information
AManufacturer name, logo, and address
BCountry of manufacture
CPatent information notication
DCE mark
ETÜV SÜD Mark
FQuality management ISO standard
GMaximum User Weight Limit
HDirective and standards compliance
IEuropean Authorized Representative
JSerial number and date of manufacture
KModel number and product description
LWEEE Directive Mark
F
G H I
A
B
C
D
E
J
K
L
002821XX
888888-88888
Please take a moment at this time to record the serial number
in the space provided below.
Serial No.:

04
AIR250 LOWER BACK OPERATION MANUAL
It is the sole responsibility of the purchaser of Keiser Corporation
equipment to instruct all individuals, whether they are the end-
user or supervising personnel, on proper usage of the equipment.
Keiser Corporation recommends that all users of its equipment
be informed of the following information before use.
1. Read these instructions.
2. Heed all warnings.
3. Follow these instructions.
4. Consult your physician before beginning any exercise
program.
5. The Air250 Lower Back is intended for use in training areas
of organizations where access and control are specically
regulated by a person responsible for determining the
suitability of use and maintenance.
6. Maximum user weight limit: 441 lbs (200 kg).
7. Use the Air250 Lower Back indoor in a climate-controlled
environment only. Keep away from areas of extreme
humidity.
8. The use of this Air250 Lower Back for any purpose not
explicitly specied by the manufacturer in this manual is
prohibited.
9. Wear proper exercise clothing and shoes for exercise. Avoid
wearing loose clothing that might catch on any moving parts.
Tie long hair back and up away from any moving parts.
10. The Air250 Lower Back is not a toy. Children shall not play
with the Air250 Lower Back. Children under 14 years old
should not use the Air250 Lower Back. Keep children and
pets clear from the Air250 Lower Back at all times, especially
while in use. Cleaning and user maintenance shall not be
performed by children.
11. The Air250 Lower Back can be used by children age 14
years and above. Persons with mental disabilities, reduced
physical, mental, or sensory capabilities, or lack of experience
or knowledge should not use the Air250 Lower Back without
constant supervision by a spotter/supervisor.
12. Proper warm-up required to help prevent injury. This Air250
Lower Back should only be used with proper instructions.
Always maintain good form and control during exercise.
If you feel pain or are unable to maintain good form, stop
immediately. Failure to follow these instructions could result
in injury.
13. Always maintain control of the Exercise Arm during exercise.
Use extreme caution in the selection of resistance and when
increasing resistance during exercise. Bring the Exercise
Arm to the start position in a controlled manner to safely
end exercise. If at any time you are not able to control
the amount of resistance during exercise, push the left
(“-”)Thumb Button to reduce the resistance.
IMPORTANT SAFETY INFORMATION
14. Never perform Power Test without a proper warm-up. This
high resistance/high-speed test should only be performed
with proper instructions (see page 14 “Power Test” for
complete instruction). Always maintain good form and
control during the test. If you feel pain or are unable to
maintain good form, stop immediately. Failure to follow
these instructions could result in injury.
15. The highest level of safety can only be ensured if the
equipment is regularly inspected for damage and wear.
Always check the equipment before use for proper function
and any damaged, worn, or broken parts. Immediately
replace damaged, worn, or broken parts. Do not use the
Air250 Lower Back until all repairs have been completed
and tested by a Keiser-certied technician.
16. Use only replacement parts supplied/recommended
by Keiser Corporation. Attempting to repair or replace
any damaged, worn, or broken parts on your own is not
recommended. A Keiser-certied technician should be
consulted.
17. The use of any exercise equipment, including, without
limitation, Keiser’s strength training equipment in which
resistance can be changed at any time during the repetition,
without proper instruction and supervision violates the
terms of the agreement for the purchase of such products.
The ability to add resistance anytime during a repetition,
including, without limitation, the ability to do a heavy
negative may be dangerous, especially for anyone that
does not recognize or respect the potential danger.
18. Users, agents, and/or anyone directing the use of the
Air250 Lower Back shall determine the suitability of the
Air250 Lower Back for its intended use, and said parties
are specically put on notice that they shall assume all risk
and liability in connection herewith.
19. If you do not understand these instructions or have doubts
about the safety of the installation, assembly, or use of this
product, contact Keiser Customer Support:
1 559 256 8000
[e-mail]
keiser.com/support
Telephone and Live Chat
Monday—Friday 9 am to 5 pm PST

05
AIR250 LOWER BACK OPERATION MANUAL
002821XX
888888-88888
CONVENTIONS USED
This Operation Manual contains the following marks:
WARNING: Indicates a hazardous situation that, if not
avoided, could result in death or serious injury.
CAUTION: Indicates a hazardous situation that, if not
avoided, could result in minor or moderate injury.
IMPORTANT: Indicates information considered critical,
but not hazard-related.
IMPORTANT SAFETY INFORMATION (CONTINUED)
Maintain and do not remove safety or notication labels for any reason. They contain important information. If unreadable
or missing, contact Keiser Corporation for a replacement (see back cover for contact information).
SAFETY AND NOTIFICATION LABELS
NO ADJUSTMENTSNO ADJUSTMENTS
A B C D
B
A
D
C

06
AIR250 LOWER BACK OPERATION MANUAL
TECHNICAL SPECIFICATIONS
49 inches
(1,245 mm)
54 inches
(1,372 mm)
32 inches
(813 mm)
151 lbs
(69 kg)
EQUIPMENT SPECIFICATIONS
TECHNICAL DATA
See Figure 2 for Air250 Lower Back dimensions and weight.
• Resistance Range 0 – 272 lbs (0 – 123 kg), change
resistance in 1 lb/kg increments
• Maximum user weight limit:
441 lbs (200 kg)
Figure 2. Air250 Lower Back Equipment Specications
AIR STORAGE TANK
The equipment contains an air storage tank (air accumulator) with the following operating parameters:
POWER
• 1.5V D Alkaline Batteries (quantity 2, Keiser PN 966500)
• 3V CR2032 Lithium Coin Cell Battery (quantity 1)
Permanently attached, not serviceable. Contact Keiser Customer Support for service.
KEISER CHIP SYSTEM
• The eChip insertion slot receives the Keiser eChip (electronic memory chip) for data transfer and storage
Maximum working pressure: 125 psi (8.6 bar)
Maximum working temperature: 104ºF (40ºC)
Minimum working temperature: 32ºF (0ºC)
Maximum vessel capacity: 140 in3 (2.29 L)

07
AIR250 LOWER BACK OPERATION MANUAL
INSTALLATION AND PLACEMENT
TRAINING SPACE
Figure 4. Training Space for the Air250 Lower Back
The equipment footprint is 54 inches x 32 inches (1,372 mm x 813 mm). The minimum recommended free space around the
equipment is 24 inches (610 mm).
Figure 3. How to Connect the Equipment to
the Keiser Air Supply
Note: Additional space at the rear may be required for taller users. Additional free space around all sides of the equipment
may be required to accommodate mobility device access.
No assembly required. Place the Air250 Lower Back on a at, level surface. Make sure the base of the frame makes full
contact with the oor. If gaps are present, relocate the equipment to an even surface.
CONNECT THE EQUIPMENT TO THE KEISER AIR
SYSTEM
WARNING: Never connect equipment to an air
source capable of exceeding 120 psi / 8.27 bar.
Over pressurizing Keiser pneumatic equipment may
cause tubing to burst, breakage of equipment,
abnormal operation, or serious injury. Use only clean,
dry, regulated compressed air at the rated pressure
range of 100–120 psi / 6.89–8.27 bar.
1. Plug the Compressor into the appropriate power
source to power the Compressor ON (allow the
Compressor to build up to a minimum of 100 psi /
6.89 bar; Keiser Compressor and Keiser Air System
not included, sold separately).
2. Connect the 1/4-inch Quick Disconnect (QD)
from the equipment into the Keiser Air Supply
(see Figure 3).
FREE AREAFOOTPRINT 24 inches
(610 mm)
24 inches
(610 mm)
Keiser Air System
(oor or wall air outlet)
Direct-connect to
Keiser Small Air Compressor
Keiser
Large Air Compressor
Keiser
Small Air Compressor
1/4-inch QD
54 inches
(1,372 mm)
32 inches
(813 mm) 24 inches
(610 mm)

08
AIR250 LOWER BACK OPERATION MANUAL
EQUIPMENT OVERVIEW
OPERATION
Figure 5. Air250 Lower Back
Upper Back Pad
Seat Belt Processor Box
Exercise Arm
Anti-Slip Steps
Increase/Decrease (+/-) Thumb Buttons eChip
Instruction Placard (not shown)
Power Display
Cylinder
Air Tank
Seat
Foot Plate
Seat Back Quick Disconnect (QD) with Tube
1
5
2
6
3
7
8
4
13
9
14
15
10
11
12
1
8
6
7
5
4
3
2
13
14
12
9
10
11

09
AIR250 LOWER BACK OPERATION MANUAL
POWER DISPLAY
Figure 6. Power Display Overview
When using the eChip, ensure that it is
fully inserted into the slot as shown.
6
1
3
2
4 5
8
7
NO ADJUSTMENTSNO ADJUSTMENTS
Rate monitoring systems may be inaccurate. Over
exercising may result in serious injury or death. If
you feel faint stop exercising immediately.
“Peak Power” not suitable for use in applications
where the health and safety of a patient may be
dependent on the accuracy of those parameters.
Use of the exercise Target program requires medical
supervision and compliance with exercise testing
guidelines.
CAUTION

10
AIR250 LOWER BACK OPERATION MANUAL
LINE 1 - RESISTANCE
The Resistance window displays the current resistance or OFF. Adjust the resistance using the (+/-) Thumb Buttons located on
either side of the Seat. When the window displays OFF, the machine enters a low power consumption sleep mode to increase
battery life. Normal operation may be resumed by pressing either Thumb Button or by inserting the eChip. If this window displays
the low battery signal (“Lo-bA”), the batteries are getting weak and should be replaced soon (D batteries, quantity 2; refer to
page 16 “Battery Replacement” for complete instructions).
LINE 2 - SET OR REPETITIONS
This window displays the current repetition count except immediately after an eChip is rst inserted, in which case it displays the
current set. The set count may range from 1 to 9 and is signaled by the appearance of three horizontal bars in the left digit. The
number of sets is dened as the number of sets of exercises performed in a four-hour period. Once four hours have passed, the
machine assumes that the user is returning for a new visit. The repetition count may range from 0 to 99. The repetition count
may be reset by momentarily pressing both increase and decrease (+/-)Thumb Buttons simultaneously. In Power Test mode, the
window will display the repetition count per test section (refer to page 14 “Power Test” for complete instructions).
LINE 3- TARGET REPS
The Target Reps window displays the number of repetitions performed on the corresponding set of the previous visit, if that set
was a normal workout set and an eChip is inserted. If the corresponding set of the previous visit was a Power Test, the display
will show “Pr.” When in Power Test mode, the window will display “P1” during the low resistance test set and “P2” during the
high resistance test set (refer to page 14 “Power Test” for complete instructions).
LINE 4 - CURRENT POWER / PERCENT OF PEAK POWER
The Current Power window can display 4 different values. During an exercise set, it displays the percent of peak power achieved
for the most recent repetition. At the end of a Power Test, this window displays the resistance to use to achieve maximum power.
When an eChip is inserted and the previous corresponding set was a normal workout set, it displays the resistance used for that
set. When an eChip is inserted, and the previous corresponding set was a Power Test, it displays the resistance to use to achieve
maximum power. When the calculated resistance to achieve maximum power is being displayed, it ashes. In summary, during an
exercise set, this window displays the power for the current rep, at the end of a Power Test it is the resistance to use for training
at maximum power; when an eChip is inserted it is the resistance to set into the window above before exercising.
LINE 5 - PEAK POWER
The Peak Power window displays the highest power that has occurred during this workout or since the data was last reset.
LINE 6 - “NO ADJUSTMENTS”
There are no adjustments input for the Air250 Lower Back machine.
LINE 7 - eCHIP READER
The eChip Reader, located at the bottom right of the Power Display, receives and reads your eChip data.
LINE 8 - eCHIP
The eChip collects workout data and can store up to 24 separate equipment models (up to 4 equipment position settings per
model) and up to 240 separate workout sets across Keiser Air and Innity Series. Designed as an electronic replacement for the
hand-written exercise card, the eChip enables recall and set-up of the exercise equipment upon the next workout. The Keiser
eChip software allows saved eChip data to be viewed, stored, and exported (.csv le format) for analysis.
NOTE: Three user eChips (red color) come standard with your Air250 Lower Back. The Keiser USB Power Kit (a USB adapter to
transfer data from your eChip to your computer and Time Set eChips to set the time zone/time on your Air250 Lower Back) is
available. For parts order, contact Keiser Customer Support (see back cover for contact information).
Keiser eChip software system requirements, download, and user manual available at keiser.com/support (search: eChip).
DISPLAY FEATURES

11
AIR250 LOWER BACK OPERATION MANUAL
PROPER OPERATION CHECK
Check equipment condition and function before every workout:
Immediately replace damaged, worn, or broken parts. Do not use the Air250 Lower Back until all repairs have been
completed and tested by a Keiser-certied technician.
* “Lo-bA” = Batteries are low, replace immediately. If batteries are dead (depleted), the Power Display remains blank (see
Battery Replacement procedure, page 16).
A. Thumb Buttons and Display — press Thumb Buttons
to check for proper “+ / -” operation and the Display
powers on*.
B. Exercise Arm — moves freely; no loose parts in the
linkage system.
C. Upholstery and Seat Belt — no excessive wear and are
free of rips or tears; Seat Belt buckle functions properly.
D. Air Leaks — no air leaks audible in the system.
E. Stability — equipment is level to a solid, at surface.
Figure 7. Proper Operation Check Illustration
D
E
B
C
A

12
AIR250 LOWER BACK OPERATION MANUAL
HOW TO USE THE AIR250 LOWER BACK
1. Sit down and place your lower back against the Seat Back. Place your feet in the middle of the Foot Rest.
2. To secure the Seat Belt (if desired), lower the resistance until it is easy to lean back so you are sitting upright. Snap
the Seat Belt together and tighten the Belt snug across your hips.
3. Lean forward as far as is comfortable, then carefully adjust the resistance to the desired amount using the Thumb
Buttons.
4. To exit safely, lower the resistance until it is easy to lean back so you are sitting upright. Unsnap the Seat Belt.
1
2
3
4
Figure 8. How to Use the Air250 Lower Back
Figure 9. Lower Back Target Muscles
ERECTOR
SPINAE
GROUP
EXERCISEADJUST
Seat Belt

13
AIR250 LOWER BACK OPERATION MANUAL
HOW TO USE THE AIR250 LOWER BACK (CONTINUED)
CAUTION
• Consult your physician before beginning any exercise
program.
• This equipment should only be used with proper
instructions.
• Proper warm-up required to help prevent serious injury.
• Always maintain good form and control during exercise.
• If you feel pain, faintness, or are unable to maintain
good form, stop immediately.
• Use caution when increasing/decreasing resistance
during exercise.
• Never make adjustments to the machine during
exercise. Failure to do so could result in serious injury.
CONCENTRIC PHASE (BACKWARD MOVEMENT)
• Holding the Handlegrips, extend backward using your low back for the movement.
• Keep your back in contact with the Upper Back Pad (Exercise Arm).
ECCENTRIC PHASE (FORWARD MOVEMENT)
• Return the Exercise Arm to the start position in a smooth, controlled manner.
• Slower speed during forward movement is recommended.
• Maintain control of the load; keep the Exercise Arm off the stops throughout the exercise.
BREATHING
• Exhale during the concentric phase (backward movement).
• Inhale during the eccentric phase (forward movement).
TRAINING TIPS
• Ensure your feet rest at on the Foot Plate throughout exercise.
• Avoid rocking your body to create momentum when pushing heavy loads.

14
AIR250 LOWER BACK OPERATION MANUAL
POWER TEST
TEST PROTOCOL — The Power Test (KEISER Six-Rep Test) is used to determine the resistance at which you achieve
MAXIMUM POWER. The test consists of two sets:
Perform all repetitions at the highest possible speed at the given resistance; speed is essential in power output.
Note: The Power Test may be performed with or without an eChip. Follow the Power Test instructions below:
Three repetitions
Low resistance, high speed
10% of your maximum
Three repetitions
High resistance, high speed
80-90% of your maximum
SET
2
SET
1
CAUTION
• Test should only be performed with proper instruction.
• Never perform Power Test without proper warm-up.
• Always maintain good form and control throughout test.
• Rate monitoring systems may be inaccurate. Over exercising
may result in serious injury or death. If you feel faint stop
exercising immediately.
• “Current Power,” “Peak Power,” and “Percent of Peak
Power” are not suitable for use in applications where the
health and safety of a patient may be dependent on the
accuracy of those parameters.
• The use of any exercise program requires medical
consultation and compliance with exercise testing guidelines.
START TEST: Press and hold both
Thumb Buttons until “6 r” (Test
Mode) displays in the RESISTANCE
window, then release the Thumb
Buttons. NOTE: TARGET REPS window
displays “P1” (Power Test Set 1).
SET RESISTANCE, LOW LEVEL
Set the resistance to 10% of your
maximum.
POWER TEST, SET 1 (P1)
Do one repetition at maximum
speed. Pause 10 seconds.
Repeat two more times.
1
4
2
5
3
6
SET RESISTANCE, HIGH LEVEL
Increase the resistance to a high
level (80-90% of your maximum).
NOTE: TARGET REPS window displays
“P2” (Power Test Set 2).
POWER TEST, SET 2 (P2)
Do one repetition at maximum
speed. Pause 10 seconds.
Repeat 2 more times.
TEST COMPLETE
The ashing number is your
Resistance setting for Maximum
Power.
TROUBLESHOOT: “ Er ” numbers 1 – 4 displayed in the CURRENT POWER window indicates not enough difference in resistance
between the low and high sets. Try again with a greater difference in resistance between the low and high sets. To restart the
Power Test, (a) reinsert eChip, if the eChip is being used, or (b) begin at Step 1 to repeat the procedure.
To exit Power Test or resume exercise,
press both Thumb Buttons until “CLEr”
is displayed or remove eChip.
You can adjust and test your resistance
setting between the rst and second rep.
The rep count will reset to 1.
You can adjust and test your resistance
setting between the rst and second rep.
The rep count will reset to 1.

15
AIR250 LOWER BACK OPERATION MANUAL
MAINTENANCE
PREVENTATIVE MAINTENANCE SCHEDULE
Daily
• Check for safe and proper function of the equipment (perform “Proper Operation
Check,” page 11).
• Clean the chrome and paint where applicable.
• Clean the upholstery: Wipe down with a clean cloth. If necessary, use water and mild
soap (neutral, non-caustic). Target areas that come in contact with sweat. Wipe dry the
equipment.
Monthly
• Check externally visible nuts and bolts are properly fastened with no looseness.
• Clean and lubricate Cylinder Rod.
• Inspect Air Line for kinks, tears, or breaks.
• Inspect Frame for any weakening in weld areas, and other connected areas.
Quarterly
• Lubricate Pivot Bushings.
• Inspect Exhaust Mufer and Air Filter for discoloration; replace if necessary.
• Verify compressor(s) cycle on/off between 100-120 psi (6.89–8.27 bar).
Annually and
other Required
Maintenance
• For complete instructions, see page 17 “Annual Maintenance.”
• Battery Replacement. The low battery signal (“Lo-bA”) will appear on the Power Display
when it is time to replace the batteries. Refer to page 16 “Battery Replacement”for
complete instructions.
NOTE: Your Keiser Air Compressor (not included with your Air250 Lower Back) requires
basic annual maintenance. Contact Keiser Customer Support for Air Compressor operator
manual or download at keiser.com/support (search: Air Compressor manuals).
Weekly
• Check parts most susceptible to wear are not damaged or broken:
– Upholstery, Seat Belt, Linkage System, Thumb Buttons, and Hand Grips.
• Wax chrome and paint where applicable; wax upholstery.
• Clean Hand Grips
• Inspect Air Line Filter.
Contact Keiser Customer Support for replacement parts order, or for any matters regarding the safe operation of your
Air250 Lower Back (see back cover for contact information).
IMPORTANT: Do not use household or industrial cleaners as they contain caustic chemicals that can destroy the paint nish
and cause corrosion. Use only mild soap/detergent (neutral, non-caustic) to clean.
CAUTION: SERVICE AND REPAIR SHALL ONLY BE PERFORMED BY KEISER-CERTIFIED TECHNICIANS.
Failure to follow these instructions can result in serious injury.
CAUTION: THE HIGHEST LEVEL OF EQUIPMENT SAFETY CAN ONLY BE ENSURED IF THE EQUIPMENT IS
REGULARLY INSPECTED FOR DAMAGE AND WEAR. Immediately replace damaged, worn, or broken parts. Do not
use the Air250 Lower Back until all repairs have been completed and tested by a Keiser-certied technician.

16
AIR250 LOWER BACK OPERATION MANUAL
Do not operate the equipment during battery replacement procedure. “Lo-bA” = Batteries are low, replace immediately.
NOTE: If batteries are dead (depleted), the Power Display remains blank. To replace the batteries, refer to Figure 10 and
follow the instructions below (no tools required).
When the batteries are replaced, the Power Display will run through a test sequence (you will see a series of numbers ashing).
Once the test sequence stops and the Power Display shows "OFF," the Air250 Lower Back is ready for use.
BATTERY REPLACEMENT
1. Unscrew the Brass Nut on the Processor Box.
Pull and remove the cover.
2. Remove the 2 D batteries by carefully pulling
out the Battery Sleeve (follow manufacturer’s
recommendations for handling, maintaining,
and disposing of batteries).
3. Observe the correct polarity position (see +/-
marking inside the battery compartment),
insert the 2 new D batteries into the battery
sleeve and install.
4. Replace the Processor Box cover and screw
the Brass Nut nger tight.
Do not dispose of batteries in a re. The
batteries may explode.
Do not open or mutilate batteries. They
contain an electrolyte which is toxic and
harmful to the skin and eyes.
Replace batteries with the same number
and type of batteries as originally installed
in the equipment.
Recycle batteries in accordance with local
recycling procedures.
CAUTION
Figure 10. Battery Replacement
Brass
Nut
Processor
Box Cover
Batteries
and Sleeve

17
AIR250 LOWER BACK OPERATION MANUAL
The following routine maintenance is recommended annually or at the time batteries are replaced:
1. Clean:
• Wipe any accumulated dust around the Frame and the Linkage System, including the Air Tank and Cylinder,
using a clean shop cloth.
2. Visual inspection of the Exercise Arm and Linkage System:
• Move freely and no loose parts. Ensure Pivot Bushings are lubricated; all externally visible nuts and bolts are
properly tightened.
3. Visual inspection of Air Lines and Communication Wires:
• Air Lines have no kinks, tears, or breaks; Communication Wires have no exposed wires or visible damage.
4. Replace the Mufer if discoloration is present:
• Tool required: 11/16 inch Wrench or Adjustable Wrench.
5. Replace the Air Filter if element is dirty (element turns a bright pink or red color):
• Tools required: Small Needle Nose Pliers, Cutter Tool (to cut off ared end of tubes).
6. Lubricate Cylinder Rod:
• Wipe the Cylinder Rod clean and coat lightly with clean, SAE 30 motor oil, or with a silicon-based spray.
1
2
3
4
5
6
Figure 11. Annual Routine Maintenance Illustration
Contact Keiser Customer Support for replacement part(s) order, or for any matters regarding the safe operation of your
Air250 Lower Back (see back cover for contact information).
ANNUAL MAINTENANCE
WARNING: HIGH-PRESSURE AIR.
DISCONNECT THE EQUIPMENT FROM
THE AIR SUPPLY AND RELEASE ALL
THE AIR IN THE EQUIPMENT (“—” THUMB
BUTTON) BEFORE PERFORMING ROUTINE
MAINTENANCE.
1
3
2
5
46

18
AIR250 LOWER BACK OPERATION MANUAL
SAFETY NOTIFICATIONS
TYPE/DEGREE OF PROTECTION CLASSIFICATION/IDENTIFICATION/WARNINGS SYMBOL
The degree of protection against
electric shock
Device is powered by two D cell alkaline batteries.
Electrical safety evaluation conducted by TÜV SÜD per
IEC/EN 60601-1 requirement.
The degree of protection against the
ingress of liquids
Not protected N/A
The degree of safety in the presence
of a ammable anesthetic mixture with
air or with oxygen or nitrous oxide
Not suitable N/A
The mode of operation Continuous N/A
Information regarding potential
electromagnetic or other interference
and advice regarding avoidance
The Air250 Lower Back use electromagnetic and RF
energy only for its internal function. Therefore, its EMC and
RF emissions are very low and are not likely to cause any
interference in nearby electronic equipment.
N/A
EMC Notices, Statement of Compliance See Electromagnetic Compatibility (EMC) section, page 19. N/A
ID of specied optional external power
supplies or battery chargers
The Air250 Lower Back does not require an external power
supply.
N/A
ID of any risks associated with the
disposal of waste products, residues,
including disposal of the equipment
itself at the end of its useful life.
The Air250 Lower Back contains electronic circuit
assemblies, 2 alkaline D cell batteries, and a sealed lithium
coin cell battery that may require compliance with specic
local disposal or recycling procedures.
The specication of the environmental
conditions of transport and storage
Use indoor in climate-controlled environment only.
Keep away from areas of extreme humidity.
NOTICE: Equipment not tested at extreme high/low
temperatures.
N/A
REGULATORY AND COMPLIANCE NOTICES
Standards ISO/EN 20957-1 Accuracy Class A (High accuracy) and Usage Class S (Studio,
commercial use); IEC/EN 60601-1 and IEC/EN 60601-1-2.
Marks
Displayed watts testing parameters: “Current Power,” “Peak Power,” and “Percent of Peak Power” are not suitable
for use in applications where the health and safety of a patient may be dependent on the accuracy of those parameters.
Clinical Settings Note: In clinical settings, patients may operate this equipment in accordance with this user manual
and the instructions and guidance provided by the healthcare personnel responsible for supervising their treatment
and care. However, patients shall not perform preventive maintenance, repairs or replace batteries on equipment
installed in clinical facilities.

19
AIR250 LOWER BACK OPERATION MANUAL
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.
US FCC COMPLIANCE STATEMENT
DISPOSAL
ELECTROMAGNETIC COMPATIBILITY (EMC)
DISPOSAL
This equipment contains electrical or electronic components, alkaline batteries, and a sealed lithium coin cell
battery that must be disposed of properly to comply with the EU Directive on disposal of waste electrical and
electronic equipment (EU WEEE Directive 2002/96/EC).
Contact an appropriate waste disposal company upon the equipment’s end of service life. Disposal must be in accordance
with respective national regulation.
Wear parts: After being replaced, wear parts must be disposed of according to country-specic waste laws.
If you have any questions about equipment disposal, please contact your local dealer or Keiser Customer Support (see
back cover for contact information).
EMC Notices — Statement of Compliance
This product has been determined to be compliant with the applicable standards, regulations, and directives for the countries
where the product is marketed.
Compliance documentation, such as Declaration of Compliance for the product, are available upon request by contacting
[e-mail]. Please include the product, model number identiers, and serial number and country that compliance
information is needed in request.
Korea
“This equipment is for home use and has acquired electromagnetic
conformity registration, so it can be used not only in residential
areas but also other areas.”

KEISER CORPORATION
2470 S. Cherry Ave.
Fresno, CA 93706
CUSTOMER SUPPORT
If you have any questions regarding the operation of the
Air250 Lower Back after reading this manual, contact
Keiser Customer Support:
285501_C
1 559 256 8000
[e-mail]
keiser.com/support
20
AIR250 LOWER BACK OPERATION MANUAL
Telephone and Live Chat
Monday—Friday 9 am to 5 pm PST
WARRANTY STATEMENT
View or print your Air250 Lower Back warranty online at keiser.com/support/warranty.
If you have any questions about your warranty, please contact Keiser Customer Support at 1 559 256 8000 and via live
chat at keiser.com/support (Monday—Friday, 9 am to 5 pm Pacic Time), or by email at [e-mail].
Customers outside the United States may obtain warranty information directly through a Keiser international distributor
or dealer in the country of installation, or direct from Keiser’s international division.
European Authorized Representative
KEISER EUROPE SP. Z O.O.
ul. Starodworska 1
Gdańsk 80-137
Polska
UK Responsible Person (UKRP)
KEISER UK Ltd.
Unit 3, Hampton Industrial Estate
Hampton St., Tetbury
Gloucestershire, GL8 8LD
United Kingdom