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MSU-DFX SERIES
Installation Instruction
ERP: IIS00344
03/11/2022
Rev1.0
Recessed Grid (T-Bar)
1. With fixture body resting face up on a stable surface, open doorframe
and remove internal reflector(s).
2. Removal of door hinge cable from housing is advised. Slide cable
through slot to disconnect door from housing. Set door aside in a
clean, safe place.
3. Locate provided power entry hole for supply connection.
4. A
: For Hazardous Locations:
Attach provided ½” Hub to hole from
outside being sure that the gasket mates with the outer surface of the
fixture. Tighten securely to housing using the nut provided. (Use only
the one (1) hub provided. ) Conduit and seal-offs are not provided
and may be required.
B:
For ordinary locations:
Create the supply entrance by securing
a conduit fitting to ½” trade size hole.
5. Remove all debris from the inside of the fixture.
6. Prepare a mounting means capable of reliably supporting more than
the weight of the fixture according to applicable building codes. Ceil-
ing Grid size is standard for 1” & 1.5” T-bar. Please specify other siz-
es when ordering.
7. Invert fixture and insert through ceiling opening and lay fixture cen-
tered on T-Bar. (For cleanrooms, verify that the grid has a gasket that
will contact the fixture flange. ) This step may require two workers.
8. Adjust mounting Swing-out support bracket(s) on housing to overlap
T-bar and support fixture on center web of T-bar. Tighten ¼-20
screws to transfer weight to T-bar, making sure gasket is com-
pressed and grid is level, without deformation.
9. Secure to structure using seismic support cables/wires to holes on
Swing-out support brackets. (Consult local code for requirements for
your geographic area.)
Note: This and all other hardware should be plated or stainless steel
if installed in a wet or damp location.
10. Rough in supply conduit and connections according to the NEC/CEC
and local requirements using minimum 90C supply wiring materials.
11. Connect grounding conductor to fixture grounding point.
12. Remove any protective films from the lens or surfaces as provided.
13. Replace reflector and secure by tightening screws or nuts.
14. If doorframe hinge cables were disconnected, reattach at this time.
(Note: Cable supported doors are reversible. )
15. Align door with housing and start screws by hand, being careful not
to cross-thread screws. Start process at two opposite corners for best
results.
16. Tightly secure doorframe using a hand screwdriver.
a. Do not overtighten. Maximum 10 inch-pounds torque.
b. Ensure that the door gasket makes a continuous seal to the
ceiling t-bar surface (overlapping door style) or fixture housing
(inset door style).
17. Energize fixture with rated voltage from a protected branch circuit.
