LX4RT LED SERIES
INSTALLATION INSTRUCTIONS
WARNING:
• T
his product must be installed in accordance with the applicable
installation code by a person familiar with the construction and
operation of the product and the hazards involved.
• Disconnect power before servicing.
• Make sure all electrical power is turned off while installing the fixture.
• LEDs are very sensitive to mechanical damage. Caution must be taken
to avoid damage to the LEDs.
• T
his luminaire must be adequately grounded for protection against
shock hazards and to assure proper operation.
• LEDs are ESD (Electro Static Discharge) sensitive devices that can be
easily damaged if the proper ESD mitigating steps are not taken.
• ESD or mechanical damage voids all warranties.
FIXTURE MUST BE INSTALLED PRIOR TO DRYWALL OR FINISHED CEILING MATERIAL.
STEP 1: CEILING FRAMING ALLOWANCES
WARNING: Ceiling material attaches to this fixture but the
attachment is NON-STRUCTUAL.
B. JOINER FIXTURES (as required) FOR ROW-MOUNT
APPLICATION ONLY
Ceiling material MUST be structurally supported by framing or other
means.
• Framing allowance for width of stand-alone fixtures is 5 ½”
minimum.
• Framing allowance for width of continuous row mounted fixtures
is 14 ½” for access to cinching screw.
• Framing allowance for length (if desired) is the ACTUAL
ILLUMINATED LENGTH shown on fixture specification sheet
+1-1/2” minimum. Additional clearance may be required for end
plate electrical hook-up.
STEP 2: FIXTURE PREPARATION
NOTE: In a continuous row-mount application, the second end plate
assembly supplied with the feeder fixture installs onto the end of
the last joiner fixture in the run.
1. Install alignment shims into leading end of joiner fixture
housing.
a. Insert shims approximately 1/2” and bend slightly outward
to create binding at steps B and C.
b. Continue to insert the side shims until the slot reaches the
fixture housing.
c. Continue to insert the top shim until the slot is only half
visible.
c: Slot
half visible
A. INSTALL BACKER FLANGES FOR PROPER CEILING
THICKNESS
• HAND TIGHTEN Screws. DO NOT OVER TIGHTEN.
• Use tin snips to modify Backer Flange length as required.
Fig. A Ceiling Thickness Chart
A
Channel Position
B
C
1
1/4
7/8
1-1/2
Backer
2
3/8
1
1-5/8
Flange
3
1/2
1-1/8
1-3/4
Position
4
5/8
1-1/4
1-7/8
5
3/4
1-3/8
2
•
•
•
•
Find ceiling material thickness in Ceiling Thickness Chart (Fig. A).
Find the corresponding Backer Flange position number (Fig. B).
Find the corresponding Channel position (Fig. C).
Align the hole position in the Backer Flange with the position on
the Channel and install Backer Flange to Channel with #8 x 1/4”
long screws provided.
• DO NOT OVER TIGHTEN SCREWS
Fig. B
H.E. Williams, Inc.
07/21/16JL
Backer Flange Positions
Carthage, Missouri
a
a
417-358-4065
b: Slot
fully visible
Confirm width gauges are installed
C. FEEDER & JOINER FIXTURES (as required) FOR ROW-MOUNT
APPLICATION ONLY
1. Install cinching brackets 1/4” from ends of mating fixture
housings with #8 x 1/4” long screws provided. Hand tighten
screws. DO NOT OVER TIGHTEN.
Cinching Bracket
(Female)
1/4”
Feeder
or joiner
housing
Fig. C
Channel
Positions
w w w.hew.com
a
Cinching Bracket
(Male)
1/4”
Joiner
housing
Page 1 of 4
PN 49090154
LX4RT SERIES INSTALLATION INSTRUCTIONS
STEP 3: FIXTURE MOUNTING
C. CONTINUE FIXTURE INSTALLATION
A. INSTALL FIRST FIXTURE (Stand-Alone fixture or FEEDER
fixture in row-mount application)
1. Set width gauges at equal distances to maintain channel width
during ceiling material installation.
1. Raise the fixture into position and secure using the suspension
holes for wire tie or 1/4-20 rod.
Suspension Holes
for WIRE TIE or 1/4-20 ROD
1. Make electrical connections to fixture.
2. Install ceiling material within 3/8” from housing.
3. Fasten ceiling material to the backer flanges on the fixture.
2. Ensure proper fixture level by hanging the bottom of backer
flange even with the ceiling material mounting structure.
WARNING: Ceiling material attaches to this fixture but the
attachment is NON-STRUCTUAL. Ceiling material MUST be
structurally supported by framing or other means.
END VIEW
Backer
Flange
Backer
Flange
Ceiling Material
Mounting Structure
Ceiling Material
Ceiling Material
3/8” maximum gap between
ceiling material and fixture housing
B. INSTALL JOINER FIXTURE(s) (as required) FOR ROWMOUNT APPLICATION ONLY
4. Remove width gauges from housings.
1. Hang far end of joiner fixture and raise the joining end into
alignment with previous fixture.
a. Cut gauge in half.
b. Push gauge halves up.
2. Make electrical connections between fixtures
3. Mate joiner fixture to previous installed fixture and tighten
cinching screw into cage nut in mating cinching bracket.
Tighten until connection is firm. Cinching brackets should not
touch. (5/16” Drive)
1/4”
1/4”
c. Pull gauge halves out from fixture channel.
Brackets may flex
when tightened but
should not touch
5/16” drive
4. Continue with remaining joiner fixtures as required until row is
complete. Be sure to install the end plate assembly supplied
with the feeder fixture onto the end of the final joiner fixture.
Page 2 of 4
PN 49090154
H.E . W illiams, In c.
C ar t hage, Mis s our i
w w w.he w.c om
417- 3 5 8 - 4 0 6 5
LX4RT SERIES INSTALLATION INSTRUCTIONS
TRIM SERIES (LX4RTR FLANGED TRIM VERSION)
STEP 4: INSTALL GALVANIZED FIXTURE COVER
1. For row-mount application, cut the double mitered side trim,
supplied with feeder fixture, in the middle between clips that
are approximately 4” apart. Install one half of the trim into the
fixture at the start of the row and the other half of the trim
into the fixture at the end of the row. Position tight against
the double mitered end trim already installed.
A. For FLANGED TRIM installation, install galvanized fixture
cover supplied with fixture to protect from over spRay
during ceiling finish work. Tape over finger holes after
installation.
Length varies by application
2ft max
between clips
4” approx.
Cut on centerline
3/4” approx.
(both ends)
DBL miter - side trim
2. Install 8ft side trims between the previous trims installed.
Cut the last 8ft side trim to fit square with the half piece of
mitered side trim at the end. DO NOT RECUT THE MITERED
ENDS.
1. Align side flanges on fixture cover with end plate.
End Plate
Half piece of
mitered side trim
(both ends)
Side Flange
Cut to length
as required
STEP 8: INSTALL LENSES
SIDE VIEW
Align
8ft side trim
A. Insert one side of lens into one side of fixture housing.
2. Overlap ends of fixture covers.
B. Push the corner of the opposite side of the lens into place.
C. Continue pushing along the housing until the entire lens is
installed.
D. Cut final Row-Mount lens to length as required.
To remove lens, pry out starting with the 4 inch wide end.
STEP 5: TAPE OVER FINGER HOLES IN FIXTURE COVERS
Tape over holes (painter’s tape)
B
C
A
Removal
STEP 6: FINISH CEILING TREATMENT
Including texture and paint as required.
STEP 7: INSTALL FLANGED TRIM (AS REQUIRED FOR TRIM
APPLICATION)
LX4R90T CORNERS: FIXTURE LAYOUT
A. Install and center double mitered end trim into ends of
fixture.
Corner fixture orientation follows the flow from the power entry end to the end of the run.
LX4RT
5.7” end trim
LX4R90T-JR
Side trim
JOINER
RIGHT
FEEDER
LEFT
POWER
ENTRY
H.E. Williams, Inc.
Carthage, Missouri
w w w.hew.com
417-358-4065
LX4R90T-FL
LX4RT-4-J
4FT
JOINER
SAMPLE
FIXTURE LAYOUT
VIEWED FROM ABOVE
CEILING PLANE
LX4R90T-JR
JOINER
RIGHT
JOINER
LEFT
LX4R90T-JL
Page 3
PN 49090154
LX4RT SERIES INSTALLATION INSTRUCTIONS
TRIMLESS SERIES (LX4RTL FLANGELESS TRIM VERSION)
STEP 4: INSTALL FLANGELESS TRIM
3. Apply edge of mask to fixture housing inside of trim.
A. Install and center double mitered end trim into ends of
fixture.
Factory
cut end
5.9” end trim
Side trim
Mask
4. Remove adhesive liner from second edge of masking.
5. Apply second edge of mask to fixture housing.
1. For row-mount application, cut the double mitered side trim,
supplied with the feeder fixture, in the middle between clips
that are approximately 4” apart. Install one half of the trim into
the fixture at the start of the row and the other half of the trim
into the fixture at the end of the row. Position tight against
the double mitered end trim already installed.
Length varies by application
2ft max
between clips
4” approx.
Cut on centerline
DBL miter - side trim
6. Continue masking fixture row. Overlap joints by 1”- 2” as
shown above.
3/4” approx.
(both ends)
STEP 6: APPLY SEAM TREATMENT
2. Install 8ft side trims between the previous trims installed.
Cut the last 8ft side trim to fit square with the half piece of
mitered side trim at the end. DO NOT RECUT THE MITERED
ENDS.
Half piece of
mitered side trim
(both ends)
8ft side trim
A. Tape and mud trim flange to ceiling material. Apply tape to
cover half of trim.
NOTE: USE A NON MOISTURE ABSORBENT TAPE, SUCH AS
FIBERGLASS MESH TAPE, TO AVOID SEAM POPPING ON THE
TRIM.
Cut to length
as required
STEP 5: INSTALL FILM MASKING (SUPPLIED WITH
FIXTURE)
NOTE: Adhesive on masking film is not permanent and can be
reapplied.
A. Adjust length of mask by cutting mid-section only as
required. Use factory cut ends to mask tight with ends of
fixture.
Tape over
half of trim
Tape and mud
trim flange
STEP 7: FINISH CEILING TREATMENT
Including texture and paint as required.
Factory cut end
Cut from center as required
STEP 8: INSTALL LENSES (See Page 3, Step 8)
1. Allow for 1”-2” overlap of masking when installed.
1”-2” overlap
2. Remove adhesive liner from one edge of masking.
Page 4 of 4
PN 49090154
H.E . W illiams, In c.
C ar t hage, Mis s our i
w w w.he w.c om
417- 3 5 8 - 4 0 6 5