LIGHTFALLS by 3M™ + Todd Bracher Installation Guide - Sconce, Rev. C, Feb. 2014
Page 3
Installation Guide LIGHTFALLS by 3M™ + Todd Bracher
Sconce
Installation Overview
The Product is an optical system that operates through precisely designed light reflections. Be careful not to bend the components when assembling and installing
the Product. Installation includes the following steps:
•
Plan location
•
Select power unit enclosure
•
Plan power unit placement and cable routing
•
Rough in cable
•
Install power unit
•
Install junction box (optional)
•
Assemble and install the Lightfalls fixture
•
Orient and mount primary reflector
Installing the Product
To reduce risk associated
with fire:
Only use the LED
driver(s) provided by 3M.
!
WARNING
Plan Location
•
Identify the proposed location on wall or ceiling.
Select Power Unit Enclosure
Local ordinances require an electrical enclosure for the LED drivers. The size and
type of enclosure will depend upon where it is to be installed.
•
Select a suitable metal enclosure, minimum dimensions 7.41" x 3.75" x 3.5"
(188.21mm x 95.25mm x 88.9mm) or 90 cu. in. for each LED driver.
•
Mount the LED driver in the metal enclosure.
NOTE: The LED driver has a maximum case temperature of 70°C (158°F)
and begins derating 20%/10°C at 50°C. Undersizing the enclosure or
mounting the LED driver with poor thermal contact may result in decreased
LED driver lifetime and void the warranty. If the LED driver case tempera-
ture is 70°C, there will be approximately 40% less light out of the fixture.
Table A. Maximum Run Length Between LED Driver and Junction Box
Plan Power Unit Placement and Cable Routing
•
Select a location for the power unit satisfying local ordinances.
•
Determine how the cables will be routed through wall or ceiling.
For fixture to power unit distance greater than 25 feet:
•
Supply additional secondary wire (Figure 1, Page 4) between the junction box
and the LED driver.
•
Determine the run length between the power unit and the junction box.
•
Select the appropriate wire gauge for additional secondary wire between the
LED driver and junction box using Table A. Column 3 of Table A displays the
maximum run lengths with a shortened wire harness less than or equal to 5
feet. One reason to shorten the wire harness would be to run plenum-rated
or riser-rated cable instead.
The Product operates on a
Class 2 circuit
and must be wired as in Figure 1 (Page
4).
IMPORTANT NOTE: To operate correctly, the wire distance from the LED
driver to the Lightfalls fixture must be within the maximum run length indi-
cated in Table A between LED driver and junction box.
Rough in Cable
•
Rough in the cable as shown in the diagram in Figure 1 (Page 4).
For installations without a dimmer and relay:
•
Cap off
Dim+
and
Dim–
with wire nuts and connect
AC_L
directly to
ACL
and
AC_N
directly to
ACN
on the LED driver.
Table B. DC Power Requirements (Varies Depending on Configuration)
Wire Gauge (AWG)
Distance with
25 ft. harness
Distance with harness
cut to 5 ft. or less
12
70
100
14
45
100
16
28
70
18
18
45
20
12
28
Model
Description
Max Input
Current (A)
Typical Input
Power (W)
Typical Input
Voltage (V)
LF1-XX
2 LEDs, each at half
power
0.45
16.2
36
