Tips
• For optimal light uniformity in halo-lit applications the Tetra
®
LED modules should be mounted on UL recognized plastic and the light
output from the Tetra
®
LED system should be directed back into the sign enclosure. This will allow for uniform backlighting of the sign
and will provide simple mounting for the Tetra
®
LED system.
• A best practice for the supply wire at the point at which it is brought into the sign is to have a drip loop on the inside of the letter to
keep water from collecting on the Tetra
®
LED strip.
• These products are not required to be enclosed or protected from weather.
Troubleshooting
Symptom
Solution
All letters are OFF
• Check AC input connection and/or check circuit breaker.
• Check wire connection(s) at the Tetra
®
LED System and power supply for improper termination(s) or short
circuits. Properly terminate or replace the wire connection(s).
• Check that connections are the red striped wire (+) of the LED strip to the red wire (+) of the power supply
and the white wire (-) of the LED strip to the black or blue wire (-) of the power supply.
Some LEDs
appear dim
• Ensure the overall length of the Tetra
®
LED System does not exceed the maximum load.
• Ensure the length of supply wire is equal to or below the recommended remote mounting distance.
• Ensure the overall length of the Tetra® LED System does not exceed the maximum load.
Some of the letters are
not illuminated
• Check wire connection(s) at the Tetra
®
LED System and power supply for improper termination(s) or short
circuits. Properly terminate or replace the wire connection(s).
• Check that connections are the red striped wire (+) of the LED strip to the red wire (+) of the power
supply and the white wire (-) of the LED strip to the black or blue wire (-) of the power supply.
Shadows
• Re-route supply wire and secure to the back of the can with electrical grade RTV silicone. Adjust wire
connector orientation so that it does not cover any LEDs.
• Adjust LED layout to ensure uniformity of illumination on the face of the letter.
Retrofit Instructions
1. (Existing Signs Only) Prior to installation, survey the site for information regarding power and accessibility inside and outside the
building. Ensure that the branch circuit supplying the existing transformer or ballast will be within the voltage ratings of the new LED
power supply, and have a current rating not exceeding 20A, or that permitted by applicable local, state, or country electrical codes
(whichever is less).
2. (Existing Signs Only) Remove the existing lighting equipment to be replaced, such as neon tubing or fluorescent tubes; and
associated transformers and ballasts. Care should be taken not to break the existing neon or fluorescent tubes. NOTE: Follow all
federal and local regulations when disposing of neon tubing, fluorescent tubes, transformers and ballasts.
3. (Existing Signs Only) If removal of the existing lighting equipment eliminates the disconnect switch, as required by applicable
local, state, or country electrical codes; a new disconnect switch must be installed.
4. (Existing Signs Only) Repair and seal any unused openings in the electrical enclosure. Openings greater than 12.7-mm (1/2-in)
diameter require a metal patch secured by screws or rivets and caulked with non-hardening caulk. Smaller openings may be sealed
with non-hardening caulk.
5. (Existing Signs Only) A clean and dry mounting surface ensures optimum adhesion if the self-adhesive method of mounting is
chosen. Follow the manufacturer’s directions when using a non-oil based solvent, such as rubbing alcohol to clean the surface area
where you intend to mount the module. Before installing, ensure the surface is dry.
6. Using the layout guidelines above, determine required number of LED modules required to illuminate the sign.
7. A 24VDC Class 2 Power Supply, as listed below, must be used with this retrofit kit. Using the Maximum Loading chart below,
determine the number of Power Supplies required to power the number of LED modules required to illuminate the sign, so as not to
overload the Power Supply chosen.
8. Follow the instructions above to properly mount the LED modules.
9. Connect the DC output of the power supply to the LED modules using the Electrical Connections instructions above.
10. Connect the power unit to the supply in accordance with the applicable local, state, and country electrical codes, and the instructions
found in the power supply installation guide.
11. If required, the disconnect switch shall be installed by qualified personnel, in accordance with applicable local, state, and country
electrical codes.
FOR UL ONLY
Tetra
®
Atom
Installation Guide
5
