Nuprodx MULTICHAIR BIG WHEEL Series User manual

!ATTENTION: READ BEFORE ASSEMBLING/OPERATING!
ASSEMBLY & PACKING INSTRUCTIONS FOR THE MULTICHAIR BIG WHEEL SERIES
!ATTENTION: READ BEFORE ASSEMBLING/OPERATING!
multichair 4020 multichair 4024 multichair 4020Rx
multichair 4220 multichair 4224 multichair 4220Rx
November 2016

A The multiCHAIR 4020 is shown in Figure 1 (other big wheel
chairs are similar).
B Unpack all parts from the shipping carton. Remove all tape
and/or packing from the chair. Keep shipping materials for future
use. Note the location of padding materials and sheet plastic
which protects parts of your chair.
C Position the seat frame upside down and install the four legs.
Note that the top of each leg has a machined portion approxi-
mately one inch wide. The back two legs have a 1" offset piece
attached to the ends. Install the back two legs so that the offset
points out at a 90-degree angle and note that the small pin must
mate with the holes in the frame (Refer to Figure 3).
DThe top end of each leg should fit easily into the socket of the
frame. Make sure that the legs slide "home" into the sockets. Use
the included ¼" Allen wrench to tighten the bolts located at the
corners of the frame. For ease of future leg height adjustment,
position each leg in the socket so that the adjustment holes face
outward (Refer to Figure 2).
offset leg with pin
seat frame
multiCHAIR 4020 shown
ASSEMBLY INSTRUCTIONS
!ATTENTION: PLEASE READ!
Please see LIMITED WARRANTY of these instructions. If the warranty is not acceptable, contact Nuprodx, Inc. for information about
returning the chair for a refund (Restocking fees and shipping charges will be applied). This chair is designed and intended for indoor
shower and bathroom use. It is not designed for outdoor use and will void the warranty if used in this fashion. If thresholds, shower
curbs or barriers are encountered that exceed ½” in height, the area in question should be brought within the code for disabled acces-
sibility.
Figure 1
Figure 2 Figure 3
SAFETY PRECAUTION!
If the small pins are not mated with the seat frame correctly there
is an extreme risk of the legs dislodging completely from the
chair. This could cause serious injury or even death!
SAFETY PRECAUTION!
If any of the legs are not fitted correctly into the socket of the seat
frame or are not securely tightened there is an extreme risk of the
legs dislodging completely from the chair. This could cause seri-
ous injury or even death!
- PAGE 1 -

mounting screw
slot in bracket
Figure 4
Figure 7
ADDITIONAL ASSEMBLY INSTRUCTIONS
A Seat Cushion Orientation: The standard seat cushion orien-
tation is with the commode opening in the front of the
multiCHAIR. If desired, the commode opening can also be orien-
tated left/right/rear. This can be accomplished by unscrewing the
four button head cap screws that attach the cushion to the frame,
orientating the commode opening to the desired location and
then re-attaching the cushion to the frame with the four screws
using the 5/32” Allen wrench (Refer to Figure 8).
B Cantilever Arms: If desired, the cantilever arms can be
removed from the backrest assembly for storage during traveling.
This can be accomplished by unscrewing the socket head cap
screws that attach the arms to the backrest posts using the 5/32”
Allen wrench. Then remove the arm assemblies from the posts
and re-insert the socke head cap screws into the arm assem-
blies, so they are not lost. To re-install the cantilever arms, simply
follow the steps above in reverse (Refer to Figure 9).
Figure 8
Figure 9
E Turn the chair right side up and install the backrest assembly.
Slide the two backposts into the back of the seat frame and tight-
en the two socket head cap screws using the ¼" Allen wrench
also tighten the four button head capscrews that attach the back
cushion to the back posts(Refer to Figures 4 & 5). For details on
the 20” frames (Refer to Figure 6).
F Install the swing-away footrests by sliding the gooseneck tub-
ing/foot paddle into the clamp that is attached to the front legs
(Refer to Figure 7).
SAFETY PRECAUTION!
Both backrest posts must be completely engaged with the seat
frame and securely tightened. If they are not fitted correctly, there
is a risk of the posts dislodging from the seat frame. This could
cause serious injury or even death!
Figure 5 Figure 6
- PAGE 2 -

Detent
Ball
C Removal of 20”, 22” or 24” Wheels: If desired (for stor-
age/cleaning purposes) the big wheels can be removed from
the leg assemblies by completing the following steps (Refer
to Figure 10).
1) Make sure the wheel locks are in the unlocked position.
2) Press down on the button of the quick release axle located
in the center of the wheel.
3) With the quick release axle button depressed, pull the
entire wheel assembly (handrim/wheel/quick release axle)
outward.
4) To reinstall the wheels, simply reverse the process above.
D Converting the multiCHAIR 4020 to a multiCHAIR
4020rx (This operation is recommended for chairs with 20”
size wheels only): If desired, the 20” wheels can be switched
with the front caster wheels and assembled to be in the front
of the chair (Refer to Figure 12). Note: Longer footrest
clamps can be purchased from Nuprodx as an optional item.
1) Remove the back assembly from the chair: Reverse the
process shown on Page 2 [Assembly Instructions] Step E
(Refer to Figures 4 & 5).
2) Remove the four legs from the seat frame: Reverse the
process shown on Page 1 [Assembly Instructions] Step C
(Refer to Figure 2).
3) Remove the two 5” casters and the footrest clamps from
the front two 11-Hole outer legs (Refer to Figure 13).
4) Remove the two 20” wheels from the axle blocks as shown
in Step C above.
5) Remove the two axle blocks from the 10-Hole offset outer
legs and re-install onto the two 11-Hole outer legs (Refer to
Figure 21 on Page 5).
6) Re-install the two footrest clamps onto the 11-Hole outer
legs and locate them underneathe the axle blocks (Refer to
Figure 14).
Quick Release Axle
Figure 10
Wheel Lock
SAFETY PRECAUTION!
When reinstalling the quick release axle into the axle block,
ensure that the detent balls are engaged by trying to pull out the
axle (Refer to Figure 11). There should be a slight amount of back
and forth movement. If the quick release axle is not reinstalled
into the axle block correctly the whole wheel assembly could dis-
lodge during usage. This could cause serious injury or even
death!
Figure 11
Figure 12
multiCHAIR 4020rx
Axle Block
Footrest Clamp
Figure 13
- PAGE 3 -
Figure 14

OPERATING INSTRUCTIONS
Figure 16
AEnsure all fasteners (bolts/washers) are securely tightened
and all chair parts have been assembled correctly (Refer back
to Assembly Instructions if needed. Contact Nuprodx, Inc. if
unsure of anything).
B Commode Chair: Position the multiCHAIR over the toilet, so
that the center of the commode opening is directly above the
center of the toilet bowl. Adjust the height of the multiCHAIR
accordingly by setting the position of the brass buttons on the
two inner legs to the various adjustment holes on the outer legs
(Note: For height adjustment of the big wheels, refer to Step F
on Page 4). Then lock the caster wheels in place. Note: Make
height adjustments to the multiCHAIR before the user has
transferred onto it (Refer to Figure 16).
C Shower Chair: Position the multCHAIR inside the shower.
Adjust the height of the multiCHAIR accordingly by setting the
position of the brass buttons on the four inner legs to the vari-
ous adjustment holes on the outer legs. Note: Make height
adjustments to the multiCHAIR before the user has transferred
onto it.
SAFETY PRECAUTION!
Ensure that the height of each inner leg is set to make the
multiCHAIR level. If this is not properly done, the multiCHAIR
could tip to one side causing the user to fall. This could result in
serious injury or even death!
- PAGE 4 -
7) Re-install the two 5” casters into the 10-Hole offset outer
legs (Refer to Figure 15).
8) Re-assemble the entire chair by completing Steps C, D, E
& F on Pages 1 & 2 [Assembly Instructions]
Figure 15

D Cantilever Arms: The cantilever arms can be adjusted to the
desired height by completing the following steps: Loosen the
socket head cap screws on the arm clamps, raise/lower the
arms accordingly, then re-tighten the socket head cap screws
(Refer to Figure 17). For safety purposes, the cantilever arms
lock in the down position. To switch the arms to the up position,
simply push the arms toward the back of the chair (releasing
the locking mechanism) and lift up (Refer to Figure 18).
E Footrest Assemblies: Footrest clamps are installed on the
front legs at the factory. Slide the footrest into the clamp.
Loosen the pinch bolt on the footrest clamp and slide up/down
as required by the user’s leg length (Refer to Figure 19).
F Big Wheel Height Adjustment: To adjust the height of the
big wheel assemblies proceed with the following steps:
1) Remove the big wheels from the axle blocks as shown in
Step C on Page 3 of the Additional Operating Instructions
2) Loosen the bolts holding the indexing plates to the axle
blocks using the included T-Handle allen wrench and move the
entire assembly up or down as required to match the height of
the two front caster wheels (Refer to Figure 20).
3) Once the you the axle block assemblies in place, make sure
that the pins located on the indexing plates are fully seated in
the outer leg holes (Refer to Figure 20).
4) Tighten the bolts holding the indexing plates to the axle
blocks using the included T-Handle allen wrench.
5) Reinstall the big wheels into the axle blocks
Figure 17
Figure 18
SAFETY PRECAUTION!
The swing-away footrests should be installed into the footrest
clamps after the user has been transferred into the chair. Putting
an extreme amount of weight on the swing-away footrests or
using them as an assistive device when transferring can cause
the entire chair to tip forward, resulting in serious injury or even
death!
Axle Block
Leg
Hole
Index Plate
Pin
Figure 20
SAFETY PRECAUTION!
If the axle blocks are not properly installed onto the outer leg
holes, this could cause the big wheel assemblies to dislodge from
the chair, resulting in serious injury or even death!
Figure 19
- PAGE 5 -

ADDITIONAL SAFETY PRECAUTIONS
!ATTENTION: PLEASE READ!
WARNING! Failure to account for the afformentioned and the following safety precautions can result in serious
injury to the user or even death!
A Leg Height Adjustment: When making height adjust-
ments to any of the legs, make sure that the brass but-
tons are fully engaged into the outer legs. If pushed too
hard the button could become stuck inside the inner leg
(Contact Nuprodx, Inc. if this occurs). Leg height adjust-
ment should only be made before transferring the user
into the chair (Refer to Figure 21).
BCaster Wheels: Before transferring into and out of the
chair, both the two front caster wheels and the two rear
wheels must be securely planted onto the floor and
switched to the locked position. Failure to do so could
cause the chair to become unstable (Refer to Figures 22
& 23).
CFasteners: Over time the screws and washers on the
chair may become loose. It is very important that these
are checked and securely tightened before each use.
Failure to do so could cause a part to dislodge from the
chair (Refer to Figure 21).
Figure 22
Figure 21
Figure 23
- PAGE 6 -
C
A

889 Hayes St., Sonoma, CA 95476
[phone], [phone] fax, [phone] toll free, [email protected]
A WARRANTY ACTIVATION Please read this warranty before operating or using your multiCHAIR. To activate the
warranty on your multiCHAIR register it online (www.nuprodx.com/form-registration/index.htm) or by phone. By operat-
ing or using the chair, you agree to the terms of this warranty.
B WARRANTY: Nuprodx, Inc. warrants this product against defects in material and workmanship as follows: There is
a 10-Day conditional money-back warranty. During this time period, the customer is permitted to try out the
multiCHAIR, fully-clothed, keeping the chair in “like new” condition (NOTE: “Like new” condition, in terms of the
multiCHAIR, is defined by Nuprodx, Inc. as no visible wear/usage/water marks for the multiCHAIR to be accepted and
refunds issued when returned to Nuprodx, Inc.). If the customer decides that the multiCHAIR will not work for them,
before the 10-Day period has passed and with the authorization of Nuprodx, the chair can be returned for a full refund
minus a 10% restocking charge (NOTE: The customer is responsible for both in-bound and out-bound freight). After
the initial 10-Day period has passed, there is a two-year limited warranty for all parts of the chair, with the exception of
the seat and back cushions. The seat and back cushions carry a one year limited warranty.
The warranty does not
cover normal “wear and tear” from everday use of the product and custom parts/custom cushions are also excluded from
the warranty and cannot be returned for a refund under any circumstances. Please see section E WARRANTY LIMITA-
TION AND EXCLUSIONS for more info on warranty exclusions.
C The warranty period begins on the date you receive the chair. For warranty service, please contact Nuprodx, Inc. no
later than one month following the applicable warranty term. The chair will be repaired or replaced at the discretion of
Nuprodx, Inc. with no charges to you for parts and labor, provided you have proof of purchase and of purchase date.
D DISCLAIMER: Except for the above warranty, and the acknowledgement by Nuprodx, Inc. that the chair, as manu-
factured by it, is fit for the general purpose for which most persons acquire a chair of its kind, Nuprodx, Inc. provides
that you accept the chair as is, without warranties, either express or implied. Nuprodx, Inc. makes no warranty of fit-
ness for your particular purpose and no warranty of merchantability beyond that already stated. No warranties extend
beyond the duration of the express warranty stated above.
E WARRANTY LIMITATIONS AND EXCLUSIONS: The only obligation of Nuprodx, Inc. is to provide the purchaser
with free repair and replacement as described above. This exclusive warranty remedy will not have failed as long as
Nuprodx, Inc. is willing and able to repair or replace as described, but if this remedy should be held to have failed, the
only remaining warranty obligation of Nuprodx, Inc.
shall be to refund the acts beyond the control of Nuprodx, Inc. The
warranty does not cover normal “wear and tear” from everday use of the product. Custom parts/custom cushions are not
covered under the warranty.
F This warranty gives you specific legal rights, and you may have other rights that may vary from state to state.
G This warranty does not apply to problems arising from normal wear, improper operation, improper maintenance,
improper storage or similar disclaimer of implied warranties, and some do not allow limitations on how long an implied
warranty may last. Some do not allow exclusion or limitation of incidental or consequential damages. So the above
limitations or exclusions may not apply to you.
H RETURN INSTRUCTIONS In the event that you need to return the Nuprodx multiCHAIR, please follow the instruc-
tions below:
1) Review the information contained in your warranty to see if this applies to you
2) Obtain a Return Authorization # from Nuprodx, Inc
3) Re-package the entire chair and its contents in the original packaging and ship to the following address:
Nuprodx, Inc. / Attn: RMA# xxxx
161 S. Vasco Rd., Suite G
Livermore, CA 94551
925-292-0714
LIMITED WARRANTY
- PAGE 7 -

Figure B - Drape the black strap across the
foam covered wheels already in the carrying
case (case not shown for clarity). Center the
inverted frame & plastic panel inside the case.
Figure C - Center the folded footrests (one invert-
ed) on the plastic panel and position as shown.
Figure D - Center the foam square on top of the
frame.
Figure A - Place one wheel (handrim side down)
in the carrying case. Place a piece of foam fol-
lowed by the other wheel (handrim side up) and
a second piece of foam.
PACKING INSTRUCTIONS
- PAGE 8 -

Figure E - Center the backrest assembly on top of
the foam, inverted frame with footrests, etc (wheels
not shown for clarity).
Figure F - Tighten & buckle the black strap around
the inverted frame & backrest assembly.
Figure G - Place one front caster leg, above the
wheels, on each side of the inverted frame &
backrest assembly.
889 Hayes St., Sonoma, CA 95476
[phone], [phone] fax, [phone] toll free, [email protected]
- PAGE 9 -