Workrite Ergonomics Sierra SEHX7890-4272OC Series Programming manual

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Parts Included, Frame Set
Assembly & Installation Instructions:
Sierra 3-Leg Desk SEHX7890-4272OC-XXX-XX-X
J4 mm Allen Wrench Qty: 1 RLeg Cable, 1 Meter Qty: 2
UStyle or Flat Foot Kit Qty: 1
N#12 x 2" Flat Head Screw Qty: 2
PCable Spool Qty: 3
BRear Bracket Qty:3
CConnector Bracket Qty: 2
ALeg Qty: 3
EShort Bracket Qty: 3
OControl Box Qty: 1
LCorner Foot Qty: 1
MFoot Glides Qty: 4
FLe End Bracket Qty: 1
GRight End Bracket Qty: 1
HCorner End Bracket Qty: 1
K#12 × ¾" Pan Head Laminate Top Screw
Qty: 61
SLeg Cable, 2 Meters Qty: 1
Q⁄" Cable Loops Qty: 15
D#M6 × 14 mm Flat Head Cap Screw
Qty: 36
I#8 × ⅝" Pan Head Screw Qty: 18
TPower Cord Qty: 1
V
Standard or
Programmable Switch
Qty: 1
Sold separately: Worksurface
W Glide Adjuster Center Foot Qty: 4
X#M6 × 12 mm Flat Head Cap Screw
Qty: 16
0.4126"
#3 Drive
0.134"3/4"
0.216"
#12 Screw Size
or
or

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IMPORTANT NOTE!
You must complete initialization (Step 13) at the end of
assembly or your work center WILL NOT FUNCTION PROPERLY.
WARNING: Maximum loading of table assembly is 300 lb (136 kg). Maximum load includes
the weight of the table top itself, any equipment placed upon it, and any equipment suspended or hanging under
it. Loading should be evenly distributed over table surfaces. “Payload Capacity” is the Workrite Ergonomics
recommended maximum loading which includes the Workrite sourced worksurface.
Sierra 3-Leg
V = 120 VAC, 60 Hz / 4.25 A maximum
FLAMMABILITY: All worksurfaces used must meet UL962 flammability requirements
• Flame Spread Rating maximum 200
• Smoke Developed Index maximum 450
WORKSURFACE SIZE: This frameset is designed to accommodate worksurfaces made from Industrial Particle Board
with the following dimensions:
Dimensions (inches):
40"–46"wL×76"– 90" wR×23"– 29"d
76"–88"wL×40"– 46" wR×23"– 29"d
IMPORTANT SAFETY INSTRUCTIONS:
When using an electrical furnishing, basic precautions should always be followed, including the following:
Read all instructions before using this Sierra Work center.
DANGER:To reduce the risk of electric shock, always unplug this Sierra Work center from the
electrical outlet before cleaning.
WARNING:To reduce the risk of burns, fire, electric shock, or injury to persons:
1. Unplug from outlet before putting on or taking o parts.
2. Close supervision is necessary when this furnishing is used by, or near children, invalids, or disabled persons.
3. Use this furnishing only for its intended use as described in these instructions. Do not use attachments not
recommended by the manufacturer.
4. Never operate this furnishing if it has a damaged cord or plug, if it is not working properly, if it has been
dropped or damaged, or dropped into water. Return the furnishing to a service center for examination and
repair.
5. Keep the cord away from heated surfaces.
6. Do not use outdoors.
7. Do not operate where aerosol (spray) products are being used or where oxygen is being administered.
8. To disconnect, remove plug from outlet.
9. Each surface intended to support an equipment payload capacity of 225 pounds.
FOR COMMERCIAL USE ONLY
SAVE THESE INSTRUCTIONS

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✓ Verify that you have all the tools needed for the assembly
You will need the following tools:
#2 tip Phillips screwdriver or drill/driver
#3 tip Phillips screwdriver or drill/driver
M4 tip bit or 4 mm Allen Wrench (J)
If you do not have a Workrite worksurface, you will also need:
⅛" pilot drill bit
3
/
32" pilot drill bit
1 Assemble Rear Brackets Set
Assemble Rear Brackets (B) to Connector Bracket (C) using
#M6×12 mm Flat Head Cap Screws (X).
Use this guide to determine the correct holes for mounting
based on the width of your work center.
Tighten securely.
or
79"
73"
67"
To avoid stripping the threads, always
insert and make the first few turns
of the screw BY HAND with an Allen
wrench (E), ensuring it is in straight.
Use with 90" W × 23" D
or 96" W × 29" D
Use with 84" W × 23" D
or 90" W × 29" D
Use with 78" W × 23" D
or 84" W × 29" D
B
X
X
X
C
C
C
B
B
B
B
B
J
X#M6 × 12 mm Flat Head Cap Screw
Hardware at actual size
Note!
Only use the #M6 × 12 mm Flat
Head Cap Screw (X) for assembly.

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2 Assemble Rear Floating Bracket - Shorter or Equal Side
Assemble Rear Brackets (B) to Connector Bracket (R )
with two #M6 × 12 mm Flat Head Cap Screws (X).
Use this guide to determine the correct holes for
mounting based on the width of your Worksurface.
Tighten securely.
43.75"
40"
37.75"
34.75"
21"
43.75"
40"
37.75"
34.75"
21"
To avoid stripping the threads, always
insert and make the first few turns
of the screw BY HAND with an Allen
wrench (J), ensuring it is in straight.
C
C
C
B
B
B
B
Use with 70"× 23",
70"×29" or
64"×23" widths
Use with 64"× 29"
or 58"×23" widths
Use with 58"×29" widths
X
X
X
J
Use with 42"– 48" widths
Floating Side,
Right Configuration
Floating Side,
Le Configuration
When shown upside down, right will be on your le and vice-versa. Your frameset may dier.
Note: Brackets can be sized
in 3" increments for any
non-Workrite top.
Note!
Only use the #M6 × 12 mm Flat
Head Cap Screw (X) for assembly.
X#M6 × 12 mm Flat Head Cap Screw
Hardware at actual size

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3 Attach Short & Medium Brackets
3.1 Attach Short Brackets (E) using #M6×14 mm Flat Head Cap Screws
(D) to all three Legs.
3.2 Attach Right End Bracket (G) to sides of the Right Leg (A) using #M6 × 14 mm Flat Head Cap Screws (D). Attach
Le End Bracket (F) to sides of the Le Leg (A) using #M6 × 14 mm Flat Head Cap Screws (D).
3.3 Attach Corner End Bracket (H) to the Center Leg (A) using #M6 × 14 mm Flat Head Cap Screws (D).
3.4 Attach both the Connected Rear Bracket (B & C assembled) and Floating Rear Bracket (B or B & C assembled)
using #M6 × 14 mm Flat Head Cap Screws (D).
3.5 Make sure the Connected Rear Bracket is
on the longer of the two sides.
Tighten securely.
Note: The Right End Bracket (G) will be on
your le when upside down.
Note: Le configurations will assemble as
a mirror image of these instructions.
Le Leg
Center Leg
Right Leg
Three piece
Connected Rear Bracket
B& Cassembled Floating Rear Bracket
Bor B& C
To avoid stripping the threads, always
insert and make the first few turns
of the screw BY HAND with an Allen
wrench (J), ensuring it is in straight.
Right End Bracket Le End Bracket
ED
D
D
D
D
D
D
B
J
D
D
E
E
H
A
A
F
G
A
Right configuration
44" & 48" configurations have a single Floating
Rear Bracket Bon the shorter side.
3.1
3.2
3.2
3.3 3.4
3.4
3.5
3.5
3.4
3.1
3.1
Le configuration
44" & 48" configurations
D#M6 × 14 mm Flat Head Cap Screw
Hardware at actual size
Caution!
Only use the #M6 × 14 mm Flat Head
Cap Screw (D) for assembly.

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4 Attach Base to Worksurface
4.1 Position Leg Assembly 2.875" from the sides and 6.125" from the front of the worksurface, making sure it runs
parallel to the back edge of the worksurface.
4.2 Use ⅛" drill bit to drill pilot holes at the six corner locations. You may wish to mark your drill bit so you do not
drill any more than ¾" deep and damage your worksurface top.
Do not drill all the way through worksurface!
6.125"
23"– 30"
23"– 30"
2.875"
6.125"
2.875"
>¾"
4.1 4.1
4.2
4.2
4.2
4.2
4.2
4.2
Note: Avoid trip or tip hazards!
For uniquely shaped, non-standard worksurfaces, it is the installers
responsibility to position the worksurface to minimize extended
overhangs and position feet fully under the worksurface.

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6 Attach Feet & Install Foot Glides
6.1 Attach one Foot Glide (M) into Corner Foot (L).
6.2 Attach Corner Foot (L) to bottom of center leg (A)
with four #M6×14mm Flat Head Cap Screws (D)
and tighten securely.
6.3 Install outside feet (U) using eight #M6×14mm Flat
Head Screws(D) included with this Frame Set.
6.4 Attach the remaining Foot Glides (M) to bottom of
the Feet supplied in your Foot Kit.
Attach Base to Worksurface
5.1 Attach at the six corner locations using #12×¾" Pan Head Laminate Top Screws (K). If you use an electric
screwdriver, be sure it is on the lowest torque setting to avoid stripping the holes in the top.
5.2 Drill all remaining pilot holes first then install all remaining #12×¾" Pan Head Laminate Top Screws (K).
Tighten securely. Do not drill all the way through worksurface!
>¾"
L
U
A
D
Note!
Only use the #M6 × 14 mm Flat Head
Cap Screw (D) supplied with Corner
Foot and Foot Kit for assembly.
M
D
M
Flat Foot shown
6.3
6.1 6.2
K#12 × ¾" Pan Head Laminate Top Screw
Hardware at actual size
5
K
K
K
K
K
K
5.1
5.1
5.1
5.1
5.1
5.1
4.1
5.1
5.1
5.1
5.1
2 screws per
End Bracket
(2 installed in step 4.1)
3 screws per
Short Bracket
1 screw per
Corner End Bracket
(2 installed in step 4.1)
18 screws per
Connected Rear Bracket
6 or 12 screws per
Floating Rear Bracket*
D#M6 × 14 mm Flat Head Cap Screw
Hardware at actual size

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7 Attach Switch (Packaged Separately)
7.1 Using the dimensions shown place the Switch (V)
on the desktop
7.2 Using a Drill and a /" drill bit, drill the two switch
mounting holes as shown.
7.3 Attach the Switch (V) as shown with two
(2) #8 x ⅝" Pan Head Screws (I)
8 Loop Power Cord & Center Leg Cable through Strain Relief on Control Box
8.1 Loop the Power Cord (T) through the strain relief channel on the bottom of the Control Box (O) as shown. Leave
8” of slack to route cord
8.2 Thread the 1 meter Leg Cable (R) from the Center Leg through the cable channel on the bottom of the Control
Box as shown. Leave 8" of slack to route cable.
8.3 Plug Power Cord (T) into power outlet AC
on the Control Box (O).
8.4 Plug Leg Cable (R) into port “3” on the
Control Box.
8.5 Lay the Control Box down in installation
location with cables in place.
Note: The Switch (V) can be located on the Right or
Le side of the table as required.
This may require relocation of the control box to
allow the switch cable to reach the Control Box (O).
8"
8"
8"
8"
8"
8"
8"
8"
Programmable Switch
1/ 1/ 
or
8.3
8.4
T
T
O
O
R
R
8.2
8.1
bottom
I
V
I#8 × ⅝" Pan Head Screw
Hardware at actual size Programmable Switch shown

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9 Attach Control Box & Cable Spools to Worksurface
9.1 Place Control Box (O) in position and use a pencil to mark pilot hole placement. Control Box should be placed
towards rear center of worksurface as shown. Remove Control Box and drill pilot holes where marked. Do not
drill all the way through tabletop!
9.2 With Control Box (O) positioned over pilot holes, attach with two #12 × 2" Flat Head Screws (N).
9.3 Attach Cable Spool (P) with the #12 × ¾" Pan Head Screw (K) to underside of worksurface in a convenient
location between legs and control box.
9.4 Lay out Leg Cables (R & S) to be sure they all reach the Control Box.
8.1
9.2
8.3
9.3
9.3
9.4
9.4
9.4
P
P
S
R
P
K
K
K
NN
K#12 × ¾" Pan Head Laminate Top Screw
Hardware at actual size
OR
N#12 × 2" Flat Head Screw
Hardware at actual size

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10 Attach Cable Loops and Route Cables
10.1 Route cables as shown, using Cable Spools (P) to take up any slack. Use the 2 Meter Leg Cable (T) for the Leg
furthest from Control Box (O).
10.2 Attach Cable Loops (Q) to underside of worksurface using #8 × ⅝" Pan Head Screw (I) making sure to wrap the
Cable Loop around the cable prior to attaching. Attach cable loops in convenient locations between legs or
switch and the control box.
Note the additional P-Loop and Cable Spool locations that may provide better attachment and routing options
for your specific configuration.
R
R
R
S
S
Q
P
P
10.1
10.2
10.1
I
Q
O
I#8 × ⅝" Pan Head Screw
Hardware at actual size
Switch Cable
Q
I
P
S
10.2