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When in 12 Hour format, a red LED in the upper left corner of the display indicates PM hours. When in 24 Hour format, the hours are displays in Military style. Front Panel To set the display format, use the jumper (J1) located on the back of the circuit board which can be accessed by removing the right side end cap and sliding the circuit board out slightly. BackSideofCircuitBoardJumper J1 On = 12 Hour display Off = 24 Hour display Page 3 12 Hour Format AMPM 24 Hour Format AM PM Page 4 Mounting The AT-DDC Wall Clock can be mounted directly to a wall, to a single gang outlet box, double hung from the wall or double hung from the ceiling. When deciding where the clock will be mounted, keep in mind that 115VAC power is required. Mounting to a Wall Tools required for mounting the clock: Drill with a 5/16" bit Hammer Phillips head screwdriver Wall anchors Pencil » After deciding the location where the clock will be mounted, make two marks 12" apart and horizontal. Note: If mounting near a ceiling, make sure the holes are at least 2 1/4" away from the ceiling. Note: Make sure you have at least 16" of side clearance on one side in order to remove the front panel. » Drill a 5/16" hole at each mark » Insert a wall anchor and tap it flush to the wall with the hammer. » Insert a screw into each wall anchor leaving 1/4" exposed. » Remove the two phillips head screws from the left or the right end cap and remove. Slide the front panel assembly out of the case and set aside. » Line up the two keyholes on the back of the case and slip over the two screws and tighten securely. ( The lower mounting holes can be marked at this point, the case removed, holes drilled and wall anchors installed if so desired) » Slide the front panel display back into the case, replace the end cap and secure with the two phillips head screws. Page 5 Mounting to a Single Gang Box Two mounting holes have been located in the center of the case 2 1/4" apart for mounting to a single gang wall box. A 7/8" hole has been placed between the mounting holes that will accept conduit if desired. Note: If mounting near a ceiling, make sure the top of the single gang box is at least 2 1/4" away from the ceiling. Note: Make sure you have at least 16" of side clearance on one side in order to remove the front panel. » » Remove the two phillips head screws from the left or the right end cap and remove. Slide the front panel assembly out of the case and set aside. Remove the desired vent cap that any Line the two holes in the case up to the single gang box and insert proper screws for the single gang box and tighten securely. » Slide the front panel display back into the case, replace the end cap and secure with the two phillips head screws. Page 6 Double Mount – Wall The AT-DDC requires optional mounting kit (SAM0625) Tools required for mounting the clock: Flat blade screwdriver Phillips head screwdriver 15/16" open end wrench The double wall mount plate attaches to a double or single gang box installed securely in the wall. Required wiring should be available through the gang box at time of installation. » Remove the two chase nipples from the mounting plate posts. » Secure the mounting plate securely to the gang box with the proper screws. (not supplied) Note: The long dimension of the mounting plate must be perpendicular to the ground to assure proper alignment of wall clocks. Mounting -Wall » Remove the two phillips head screws from the left and the right end caps of the two DDC4 clocks and remove. Slide the front panel assemblies out of the cases and set aside. » Place the two DDC4 clocks back to back and secure by inserting a #10 screw through the two key holes and the two lower mounting holes using lock washers and nuts supplied with the mounting kit. » Attach the modified end cap to the end of the clocks that will be attached to the wall mount plate using the original end cap screws. » Align the holes of the end cap support plate with the holes in the modified end cap and secure with 4 #6 phillips head screws (supplied) Page 7 » Line the two posts from the mounting plate up with the two holes of the modified end cap. Insert the chase nipples through the holes of the modified end cap and secure to the mounting plate with a 15/16" wrench. » Slide the front panel assemblies in partially. Secure the required wiring and install the battery if used. » Slide the front panel assemblies in fully. Install the end caps and secure each with its two screws. » Discard or store the two original end caps the modified end caps replaced. mounting plate #10 lock washers #10 screws end cap support chase nipples modified end caps DDC4 cases #10 hex nuts #10 lock washers Page 8 Double Mount -Ceiling Requires optional mounting kit (SAM0626) Tools required for mounting the clock: Flat blade screwdriver Phillips head screwdriver 15/16" open end wrench The double ceiling mount plate attaches to a double or single gang box installed securely in the ceiling. Required wiring should b...