ACULUX 4" ROUND THICK CEILING ADAPTERS
These adapters are for use with Aculux 4" round aperture fixtures using self-flange or drywall ceiling flangeless trims when
ceiling thickness exceeds 7/8".
CTA4/125 is for use with 7/8" thick to 1-1/4" thick ceilings.
CTA4/163 is for use with 1-1/4" thick to 1-5/8" thick ceilings.
CTA4/200 is for use with 1-5/8" thick to 2" thick ceilings.
Note: Aculux housings require vertical adjustment of the aiming mechanism to ensure maximum performance at various ceiling
thicknesses. The aiming mechanism can be set for 1/2" thru 1-1/2" ceiling thicknesses with 1/8" increments before or after housing
installation. This adjustment must be set for proper retention of the trims.
To adjust (refer to Fig. 1):
1. Loosen thumb nuts (A) on both sides of the aiming mechanism.
2. Flex left and right trim retainer/height adjustment brackets (B)
inward to disengage aiming mechanism.
3. Raise or lower aiming mechanism until indicators point to the
corresponding ceiling thickness (C). If ceiling thickness is
unknown, measure from housing to ceiling surface (D) and
subtract 1/8" from this measurement. Set aiming mechanism
height at this value.
4. Allow trim retainer/height adjustment brackets to flex back towards
original position, locking height.
5. Tighten thumb nuts loosened in step 1.
Trim Spring Height Adjustment
In some applications, trim spring height adjustment is required.
If ceiling thickness is 1-5/8" to 1-3/4", one spacer per trim spring
is required. If ceiling thickness is 1-3/4" to 2" two spacers per
trim spring are required. (Spacers are shipped with thick
ceiling adapters)
To install (refer to figure 2):
Remove and discard screws holding trim spring assemblies in place.
Install spacer(s) and trim spring assemblies as shown with provided
hardware.
Product Services Phone (888) 387-2212
1300 S. Wolf Road • Des Plaines, IL 60018 • Phone 800-323-5068 • Visit us at www.acuitybrands.com/aculux
©2018 Acuity Brands Lighting, Inc.
INSTALLATION INSTRUCTIONS
Figure 1
Figure 2
Rev 06/18
P5517
SPRING
ASSEMBLY
SPACERS
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