Installation Manual

Recommended tools and materials for ACT/Grid/Suspended ceiling and regress lay-in (RG) installs

(Supplied by others)

• Large flat head screwdriver (to open K.O.)
• Pozidriv screwdriver or Pozidriv screwdriver bit (for Grid clips screws)
• 12-Gauge (1.5mm) hanger wire
• 12-2 or 14-2 WG NM-B Romex and 1/2 in. Romex Electrical Wire Clamp. Suitable for use with Flexible Metal Conduit (FMC) and Squeeze Connector. 1/2 in. Knockout 90-Degree Connectors are required for tight two dimensional arrays.

Recommended tools and materials for drywall/plasterboard installs

(Supplied by others)

• M6 hexagonal nut driver (nut spinner) with 10mm (13/32 in.) hex size
• Drywall saw
• Laser level (to align cut-out or when installing multiple fixtures)
• Tape measure
• Large flat head screwdriver (to open K.O.)
• Pozidriv screwdriver or Pozidriv screwdriver bit (for wood screws)
• 6x #10 (5mm) countersunk wood screws for wood joists (8x for the 4×4, which has 4 screw holes per bracket), or self-tapping/self-drilling screws (e.g. MF20 wafertek screws) for metal channels.
• 12-2 or 14-2 WG NM-B Romex and 1/2 in. Romex Electrical Wire Clamp. Suitable for use with Flexible Metal Conduit (FMC) and Squeeze Connector. 1/2 in. Knockout 90-Degree Connectors are required for tight two dimensional arrays.

Individual drywall/plasterboard installations with joists

Joist Mounting Kit supplied when spec code "JB" is used for mounting option. This method applies to both wall and ceiling installations.

Individual drywall/plasterboard installs without wood joists

ACT/Grid/suspended ceilings installations

Grid Clip Mounting Kit supplied when spec code "GC" or "RG" is used for the mounting option. The following pages cover the required plenum clearance above the grid and the grid weight-support requirements, with an interactive 3D simulation of the insertion maneuver.

ACT/Grid: plenum clearance for the insertion maneuver

The fixture trim is wider than the grid opening — by design, so it lands on top of the tee flanges — which means the unit only passes through the grid tilted. It threads up through the opening at a shallow roll, levels out while its lower edge stays dipped in the opening, slides sideways above the tee bulbs, and then lowers onto the grid: the trim rests on the flanges and the grid clips engage the tee bulbs. The matrix below gives the minimum clearance between the grid face and the structure above for this maneuver, including a 1″ working margin.

Remove the ceiling tiles along the insertion run before starting. Fixtures longer than a single grid opening (a CS24 fed lengthwise through a 2×2 grid, or the CS44) additionally need one cross-tee or main-tee section temporarily removed so the fixture's long axis has a straight open run; snap the tee section back in once the fixture is above the grid, before lowering it into place. Removing and reinstalling a tee section is routine grid work — follow the grid manufacturer's instructions and re-attach any displaced hanger wires.

Fixture size and insertion direction	Trim dimension crossing the opening	15/16″ tee grid	9/16″ tee grid
CS12 / CS14 / CS154 end to end (short side across a 2-ft module)	11-15/16″ or 17-3/4″	≥ 6-1/4″	≥ 6-1/4″
CS22 · CS24 end to end · CS12 side by side	23-3/4″	≥ 6-1/2″	≥ 6-1/2″
CS14 / CS24 side by side	47-3/8″	≥ 6-3/4″	≥ 6-1/4″
CS154 side by side	47-3/4″	≥ 6-3/4″	≥ 6-3/4″
CS44 either way (47-3/4″ trim, 5″ deep, ships 2027)	47-3/4″	≥ 8-1/4″	≥ 8-1/4″

Clearance is measured from the grid face (tee flange plane) to the underside of the lowest obstruction above — structure, ducts, and the grid's own hanger wires all count. Assumes a standard tee web of 1-1/2″ or less. The CS44 is 5″ deep overall and its rear mounting brackets overhang the trim about 1/2″ on two sides — orient those brackets along the open run when inserting. Use the interactive simulation on the next page to scrub through the maneuver and orbit the view.

ACT/Grid: weight support requirements

Suspended-ceiling grids are classified by ASTM C635 main-runner capacity: light duty (5 lb/ft), intermediate duty (12 lb/ft) and heavy duty (16 lb/ft), each at L/360 deflection over a 4-ft span. With main runners at 2-ft centers those correspond to roughly 2.5, 6 and 8 lb/ft² of distributed capacity; main runners at 4-ft centers carry half that. The table below gives each fixture's weight, its distributed load over its own footprint, and the support it requires per ASTM E580 / CISCA seismic installation practice (adopted by most North American building codes).

Fixture size	Weight	Load over footprint	Required support
CS12 (1×2 ft)	7.3 lbs	3.7 lb/ft²	Grid clips; safety wires where required by local code
CS14 (1×4 ft)	25.1 lbs	6.3 lb/ft²	Grid clips + two #12 slack safety wires to structure
CS154 (1.5×4 ft)	33.7 lbs	5.6 lb/ft²	Grid clips + two #12 slack safety wires to structure
CS22 (2×2 ft)	24 lbs	6.0 lb/ft²	Grid clips + two #12 slack safety wires to structure
CS24 (2×4 ft)	43.7 lbs	5.5 lb/ft²	Grid clips + two #12 slack safety wires to structure
CS44 (4×4 ft, ships 2027)	82 lbs (est.)	5.1 lb/ft²	Independent support from structure required (≥ 56 lbs) — do not rely on the grid

• Specify intermediate- or heavy-duty grid with main runners at 2-ft centers for any Circadian Sky size; use heavy duty where main runners run at 4-ft centers. Light-duty grid is only adequate for the CS12.
• Fixtures between 10 and 56 lbs: attach two 12-gauge slack safety wires from the fixture's grid-clip attachment points to the structure above, so the fixture cannot fall into the room if the grid is compromised.
• The CS44 (82 lbs) exceeds the 56-lb threshold and must be supported directly from the structure, independent of the grid (No. 9 gauge wire or an approved alternate from the fixture eye-bolt points), before it is released onto the grid. The grid then only locates the fixture and carries the trim line.
• Seismic design categories, fire-rated ceiling assemblies, and the grid manufacturer's load tables govern where they are more restrictive — confirm capacity with the ceiling-system supplier.

ACT/Grid: interactive clearance simulation

Scrub the time slider to step through the grid insertion maneuver, drag to orbit, and switch fixture size, insertion direction and tee width to see the clearance each combination needs. The ghosted cross tee marks the section removed to open the run; it reinstalls once the fixture is above the grid. The printed manual shows the worst-case side profile for the selected configuration.

Regress lay-in (RG) drywall coffer installations

Applies when spec code "RG" is used for the mounting option. Fixtures are laid into a site-built drywall coffer, similar to lay-in ceiling tiles, resting on perimeter supports with no load-bearing mounting kit. The included grid clips are not load-bearing here; their attachment points accept hanger wire so each fixture can be tethered to the structure above to prevent it from falling into the room during seismic activity, while staying removable from below. These pages cover the required overhead clearance, the coffer construction and sizing, and the installation steps; wiring and controls are covered in the standard sections of this manual.

Regress lay-in (RG): clearance for the lay-in rotation

Regress lay-in (RG): interactive clearance simulation

Regress lay-in (RG): worst-case positions, continued (4-1/8″ regress build-up)

Regress lay-in (RG): array with framing and drywall

Regress lay-in (RG): materials and coffer sizing

Regress lay-in (RG): installation steps

Individual vertical (In-wall) installations

Tight array with drywall/plasterboard ceilings or walls installations

Wall tight array with metal studs (1×4, 2×4, 1.5×4, 4×4 fixtures)

For landscape orientation 4ft fixtures (CS14, CS24, CS154, CS44) in a tight wall array using metal stud framing.

Front View (Without Drywall)

Mounting Close-ups

Surface mount installations

Surface Mount Kit supplied when spec code "SM" is used for mounting option.

The four side panels ship separately, with peel-off adhesive already applied. Fit them after the fixture is mounted and wired (Step 4) so the fixture is easier to handle and the panels stay protected.

⚠ Safety Note: Gloves are recommended when handling the surface mount kit as edges may be sharp.

Step 1: Locate and Mark Studs

For remodeling/retrofit, use a stud finder to locate and mark studs. Mark and measure actual on-center stud spacings (OC). Typical spacing is 16" O.C.

Stud Finder: Use a quality stud finder to locate wood joists behind drywall. Mark both edges of each stud to ensure accurate centering of screws.

Surface mount installations (continued)

Step 2: Cut and Mount Plywood Backing Plate

Note: Plywood backing plate and mounting hardware supplied by others.

Equipment and Parts:
• ≥4x Wood screws (#12 x 2" Phillips Pan Head Wood Screws, e.g., Homedepot #802572 or Lowes #57385)
• 4x 1/4-in 1-in Self-Drilling wood screws (e.g., Strong-Tie, Homedepot, Lowes #SDS25112-R25)

Steps:
1) Cut a 3/8" thick plywood back plate to suit the fixture size (see table below).
2) Mounting holes can be with 1/4" screws or bolts. 1/4"-20 Machine screws and wood insert nuts can be used if junction box requires frequent inspections as wood screw holes can be damaged over time. Self-drilling wood screws are faster.
3) Pilot holes into wood are not required for mounting holes if using self-drilling wood screws. However, drilling through drywall with a 1/4" is recommended to avoid lifting.

Fixture size	Backing plate minimum size			Mounting holes
	Length(L)	Width(W)	Thickness	X	Y	Drill bit
1x2	23"-1/2	5"	3/8"	3.74" (95mm)	22.05" (560mm)	23/64"
1x4	47"	5"	3/8"	3.74" (95mm)	45.67" (1160mm)	23/64"
2x2	23"-1/4	17"	3/8"	15"-3/4 (400mm)	22.05" (560mm)	23/64"
1.5x4	47"	5"	3/8"	3.74" (95mm)	45.67" (1160mm)	23/64"
2x4	47"	17"	3/8"	15"-3/4 (400mm)	45.67" (1160mm)	23/64"
4x4 (2027)	47"	47"	3/8"	45.67" (1160mm) prelim.	45.67" (1160mm) prelim.	23/64"

Note: Only 3/8" plywood is recommended for the backing plate. 1/4", 1/2", and 3/4" thicknesses are NOT suitable.

Surface mount installations (continued)

Step 3: Mount Fixture and Close Trim

Mount the fixture to the plywood backing plate using the 4 mounting holes at the corners. Once secured, close the front trim to complete the installation.

Screw locations

Complete installation by securing trim.

Note: Use 4 screws at the corner mounting holes. Select appropriate fasteners for your backing plate (wood screws, machine screws with nuts, etc.).

Once the fixture is secured and wired, fit the side panels (Step 4).

Surface mount installations (continued)

Step 4: Attach the Side Panels

The four side panels ship separately from the fixture, with peel-off adhesive already applied to their mounting faces. Attaching them after the fixture is installed keeps the fixture easier to handle and protects the panel finish during the mounting and wiring work.

Side panels shown separated from the housing. Two long panels and two end panels per fixture.

Before mounting the fixture: the panels may be held against the housing to confirm the finished fixture depth and the mounting distance to the wall or ceiling. Leave the adhesive backing in place while doing this.

Steps:
1) Confirm the fixture is mounted, wired and the trim is secured.
2) Wipe the housing sides clean and dry so the adhesive bonds properly.
3) Peel the backing from one panel, align it to the housing edges, then press it firmly along its full length. Repeat for the remaining panels.
4) Remove the protective film from all four panels once they are attached.

Note: Position each panel before pressing it down. The adhesive bonds on contact and the panels are not intended to be repositioned once pressed into place.

Behavioral health drywall (BHD) kit installations

BHD kit supplied when spec code "BHD" is used for the trim option. The kit includes the mounting brackets: Behavioral Health housing side channels and center beam with carriage bolts, framing template, security hardware, clear polycarbonate shield and trim.

Installation summary

1. Frame the opening with steel framing (min 20-gauge, ideally 16-gauge) and drywall, using the supplied framing template.
2. Attach the Behavioral Health housing side channels and center beam (mounting brackets) with the supplied M6 carriage bolts.
3. Set the light fixtures and secure with M6 hex nuts; adjust nuts to level the fixtures flush.
4. Complete wiring per the Wiring section of this manual.
5. Fit the clear polycarbonate shield and trim; secure with the supplied T30 Security Torx screws (bit supplied).

Note: The full step-by-step BHD Kit Installation Manual ships with each kit - follow it for framing dimensions, torque and shield handling. Use only the factory-supplied security hardware to preserve the anti-tamper approvals.

Behavioral health grid ceiling (BHG) installations

BHG kit (clear polycarbonate shield + pin-in Torx security screws) supplied when spec code "BHG" is used for the trim option.

The fixture installs above a security grid ceiling system (e.g. Gordon Lockdown® MH) and normally bears directly on the grid: security ceiling grids are engineered for far higher loads than the fixture weight (see the load table on the next page). Independent suspension with hanger wire and eye bolts is only required where seismic codes or the ceiling system supplier mandate independent support. The clear polycarbonate shield mounts below the fixture aperture and is secured from below through the exposed grid tees with the supplied tamper-resistant pin-in Torx security screws, preserving the anti-ligature rating of the ceiling. Grid tees, cross tees, security panels and compression struts are by the ceiling system supplier.

Security grid ceiling cross-section (ceiling system supplier detail): shield secured from below via the exposed grid with tamper-resistant fasteners.

Step 1: Confirm grid layout

Confirm the fixture arrangement within the grid module before installation. Arrangements that add 2' cross tees between fixtures are preferred; cross tees are supplied and installed by the ceiling installer.

Behavioral health grid ceiling (BHG) installations (continued)

Step 2: Set fixture and shield on the grid

Place the fixture over its grid opening so it bears on the main tees, then position the polycarbonate shield under the fixture aperture, aligned to the grid tees. Fixture loads are well within security grid capacity. For reference, ASTM C635 heavy-duty mains (16 lb/ft, 4' span) at 2' o.c. correspond to roughly 8 lb/ft² of distributed capacity, and welded heavy-gauge security grids are engineered beyond heavy-duty class (confirm capacity with the ceiling system supplier):

Fixture	Weight incl. shield	Footprint	Load
CS12 (1×2')	~8.3 lb	2 ft²	~4.2 lb/ft²
CS22 (2×2')	~26.0 lb	4 ft²	~6.5 lb/ft²
CS14 (1×4')	~27.1 lb	4 ft²	~6.8 lb/ft²
CS154 (1.5×4')	~36.6 lb	6 ft²	~6.1 lb/ft²
CS24 (2×4')	~47.6 lb	8 ft²	~6.0 lb/ft²
CS44 (4×4', ships 2027)	~90 lb (est.)	16 ft²	~5.6 lb/ft² (est.)

Seismic note: where the project's seismic design category or the ceiling system requires independently supported fixtures, use the fixture eye bolts with 12# hanger wire to the structure (shown on the previous page).

Step 3: Secure with security fasteners

Drive the supplied pin-in Torx security screws from below through the exposed grid into the shield perimeter at the spacing shown. Do not substitute standard fasteners.

Note: A dimensioned assembly detail (Circadian Sky Behavioral Health Lockdown Ceilings Assembly) is supplied with each BHG order - follow it for screw counts and hole locations for your fixture size. Contact Innerscene before substituting ceiling systems or fasteners.

Mounting Holes & Wiring Connections

⚠ IMPORTANT: Only use the existing mounting holes to secure the fixture. DO NOT drill additional holes — LEDs and circuit boards are located along the edges and drilling may cause permanent damage to the fixture.

Remote power supply installation

The 24 VDC power supply (PSU) ships integrated to the fixture by default. When spec code "REM"is selected, the PSU is shipped uninstalled so it can be mounted remotely (e.g. above the ceiling plenum, on a junction box, or in an accessible service area). Innerscene uses Mean Well SLD-50-24 (35–45 W fixtures) or SLD-80-24 (75 W fixtures) — both have the same terminal layout described below.

Recommended cable AWG vs. one-way distance

Maximum one-way cable length per AWG that keeps round-trip voltage drop ≤ 0.5 V on the 24 VDC bus. Use stranded copper, twisted pair recommended. Values calculated at 25 °C — derate for higher ambient.

Remote power supply installation (continued)

Installation steps

1. Mount the PSU enclosure in an accessible, dry location with adequate airflow. Secure per local code; orient with vents unobstructed.
2. Wire line-voltage AC input (110–277 VAC) to the PSU per the markings on the unit. Bond ground.
3. Run the 24 VDC output from the PSU to the fixture's controller board. Size the conductors per the table above. Connect red wire to VIN and black wire to GND on the controller board.
4. Use the supplied WAGO 221 connectors (or equivalent UL-listed connectors rated for the conductor size) at the fixture end.
5. After power-up, verify ≥ 23.5 V at the controller board input terminals at full output.

Power supply reference

Mean Well SLD-50-24 / SLD-80-24 PSU body — top view. End flanges provide mounting holes; line-voltage AC terminals are on one end, 24 VDC output (red + / black −) on the other. For REM installations, the PSU is removed from its carrier and mounted remotely.

Wiring diagram

⚠ Wireless Group Installation

Unlike typical fixtures that each require individual control wiring, Innerscene uses wireless groups to reduce installation cost and ensure perfect synchronization. Each group has one Primary fixture (with control wiring) that wirelessly coordinates all Secondary fixtures in the group—eliminating voltage drop issues and ensuring all fixtures match brightness and color exactly.

Installation Steps

1

Sort by Group:Group all boxes with the same Wireless Group number

2

Install Together:All fixtures in a group go in the same room/area

3

Stay in Range:Keep Secondary fixtures within ~50ft of Primary

4

Wire Primary Only:Connect control wiring to Primary; Secondary needs power only

5

Test:Verify all fixtures in a group dim and change color together

Wireless Star Network

Primary (blue) in center, Secondary fixtures within ~50ft

Commissioning

Factory Pre-Commissioning

When ordering Circadian Sky fixtures from Innerscene with factory pre-commissioning, the local time and geolocation will be saved into the Primary fixture. The Primary fixture contains a non-rechargeable battery that will maintain the clock for around 10 years (or indefinitely if power to the fixture is maintained and dimming is used to turn off the fixture).

Primary vs Secondary Fixtures: The Primary fixture is the only fixture to require hard-wired control signals (unless using Casambi Controls). It will automatically send out dimming and colour control signals wirelessly to nearby Secondary fixtures within the same zone.

Programming Codes

The programming code in your spec determines the default behavior:

Note: For P0001 and P0002, external dimmer signals are ignored for the first second after power on. If external control changes after this, the automated schedule will be overridden.

On-Site Schedule Configuration

To update the schedule on-site, connect to the fixture's WiFi network (e.g., Innerscene-0-10V-XXXX or Innerscene-cas-XXXX) using password "innerscene", then navigate to 172.30.0.1 in a web browser to access the configuration interface.

For detailed scheduling instructions, scan the QR code or visit our help page.

Scheduling Help

Casambi Controls

Casambi offer a comprehensive ecosystem of wired and wireless controls to work with Innerscene light fixtures. For North America, wall switches are available in either hard wired or battery powered versions with different face plates and button configurations as shown below, available from Magtech Industries Corp.

CASAMBI CONTROLS GUIDE

For detailed instructions on Casambi app setup, network configuration, scene programming, and circadian profile customization, scan the QR code or visit:

innerscene.com/support/casambi-controls-guide

Dual channel 0-10/1-10V Controls

Innerscene fixtures support sink and source current with auto-detect. Innerscene also supports log/linear options and digital trim controls using its built-in WiFi interface.

Acuity Brands' nLight™ wired system

Two 0-10V dimmer switches (example: Lutron Diva™ or Nova T™)

Single channel 0-10/1-10V Controls

Innerscene fixtures support sink and source current with auto-detect. Innerscene also supports log/linear options and digital trim controls using its built-in WiFi interface.

Single channel 0-10V dimmer switch (example: Lutron DVSTV-WH, NTSTV-DV-WH, or Leviton IP710-DLZ)

Diva and Nova T are trademarks of Lutron Electronics Company.

DMX Controls

DMX Wiring and Setup

DMX Controls (continued)

for Installers

1. If the fixture is at the end of the signal run then fixture to Termination. DIP switch on Daugterboard postition 1 to ON/UP.
2. Set the same starting channel on the fixture as the DMX controller/console using the DIP switch. The DIP switch use Binary encoding, for example, channel 17 is 0000010000.
3. By default the switches at all set to OFF and will not respond to DMX signals.
4. First channel is Intensity/Dimming. Second channel is Color/Tuning. For example, if starting channel is set to 17, channel 17 is Dimming control (Intensity), channel 18 is Color control (CT).

CIRCADIAN SKY DMX DAUGHERBOARD

DALI Controls

Caution: only DALI-2 DT8 Tc tunable white profile is supported. For dual address DALI-1 please contact Innerscene support line.

DALI-2 DT8 Tc System Wiring