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CHAIR ADJUSTMENT INSTRUCTIONS
To maximize the ergonomic benefits of this chair, it is essential to understand how the controls function and how they affect your posture.
ADJUST THE
HEIGHT RANGE:
The wavetube gives the chair an
extra 10" of height adjustment,
providing a total seat height
range of 17" to 35". Determine
the appropriate range for the
task or tasks at hand. Place a
foot on the chair base and lift the
seat with a sharp pull. The upper
chair assembly will disconnect
from the base. Spread the
tapered bushing and move it
along the wavetube to the
desired position (up toward the
seat for lower height range,
down for higher ranges). Do not
let any part of the bushing
extend beyond either end of the
wavetube.
MAINTENANCE
The pneumatic lift in the Wavetube Assembly
is permanently lubricated at the factory and
needs no further lubrication.
LUBRICATE THE PNEUMATIC LIFT. Do not
remove clip from bottom of Wavetube. Contact
Safco immediately if clip is missing or
damaged. Clean polyurethane seat and back
with soap and water. To repair small cuts in
polyurethane, apply a few drops of quick-
drying glue into the cut and press the sides
together until the glue sets.
5117-37MP: 2 of 6; Rev. 3: 12/03
ADJUST THE
FINAL HEIGHT:
The lever under the seat on the right side
pneumatically adjusts the height of the seat over a
range of about 8". The proper height should be
determined by a combination of variables: the
height of the work surface, the task to be performed
and your body size. Typically, the chair should be
high enough so your arms form a 90
elbow or slightly greater. This allows for better
circulation in the shoulders and neck area and also
reduces the amount of fatigue in the forearms and
hands. The feet should lie flat on the ground or
footrest. To help insure good posture, maintain a
90
angle at the bend of the knees.
o
NEVER
angle at the
o
GENERAL SAFETY INSTRUCTIONS
Do not stand on seat.
Chair must be on level surface to ensure proper
stability.
Only use chair when fully assembled.
Periodically check fasteners and tighten securely
if needed.
Never use chair if it does not perform according to
this sheet or warranty may be void.
CAUTION: Allow for optimum support. Never
try to position Tapered Bushing below the
retaining ring at the bottom of the Wavetube.
Always leave at least 1/2" clearance between
the bottom of the Wavetube and the floor.
Safco Products Company, New Hope, MN 55428
ADJUST THE BACK
HEIGHT AND DEPTH:
Loosen the backrest height adjustment knob
behind the seat. Slide the backrest assembly
up or down and adjust the height of the back,
which has a lumbar support curve to it. The
knob under the seat allows you to adjust the
backrest forward and back. Sit centered on
the seat. The curve in the backrest should fit
into the small of your back. This will reduce
the pressure on the spinal discs, especially
in the lumbar area.
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