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OPTIONAL VERNIER SHEAR
REDUCTION
About Vernier Shear Reduction (VSR)
WARNING
The relationship between Vernier Shear Re-
duction (VSR) and the recline function of the seat-
ing system is dependant on the needs of the user
and MUST be set and adjusted by a trained au-
thorized Invacare Dealer.
Have the relationship between Vernier
Shear Reduction (VSR) and the recline function
of the seating system periodically inspected to
maintain proper setting for the user. Otherwise,
injury to the user may result.
Vernier Shear Reduction (VSR) moves the back of the
seating system along with the recline function. VSR re-
duces shear between the user and the seating system
as the seating system reclines.
NOTE: VSR is electronically linked to the recline
function of the seating system and operating the re-
cline function automatically activates VSR.
VSR function can also be used independently from the
recline function to allow for a change in seating position or
access to additional seating system options. Refer to
US-
ING VERNIER SHEAR REDUCTION (VSR) INDEPEN-
DENTLY OF RECLINE FUNCTION in this procedure of
the manual.
Using Vernier Shear Reduction (VSR)
Independently of Recline Function
(FIGURE 1)
WARNING
The back of the seating system MUST be
returned to original position BEFORE the
degree of recline is changed (increased
or decreased). Otherwise, the relation-
ship between Vernier Shear Reduction
(VSR) and the recline function of the seating sys-
tem will change, possibly resulting in injury to
the user.
1. Make sure the wheelchair is on a level surface.
2. Note the current position of the back.
SHEAR REDUCTION
This Procedure Includes the Following:
Optional Vernier Shear Reduction
Four-Way Toggle
Switch (Shown in
Neutral Position)
FIGURE 1 - USING OPTIONAL VERNIER
SHEAR REDUCTION INDEPENDENTLY OF
RECLINE FUNCTION
PROCEDURE 7
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3. Push four-way toggle switch towards the left of the
wheelchair until the desired VSR is achieved.
NOTE: Left and right is determined by sitting in the wheel-
chair.
NOTE: The four-way toggle switch will alternate
functions (move VSR actuator UP, move VSR
actuator DOWN) after it has been released to the
neutral position for a minimum of one (1) second.
NOTE: If the wheelchair is equipped with switch op-
tions, scan to the correct ECU or Auxiliary Mode
and activate the control device in the correspond-
ing left direction to operate the VSR function. Re-
fer to the MKIV owner's manual, part number
1043576 for complete switch option operating in-
structions.
4. Return the back to the position noted in STEP 2 BE-
FORE changing the degree of recline.