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Semi-Flush Mounting
The power supply portion of the master clock can be recessed into the wall, so that
the display unit is semi-flush with the wall. This should only be done by a qualified
technician.
To mount the master clock semi-flush:
1. Place the master clock on its back with the display unit facing up and the key pad to
the right.
2. Remove the two screws at the top of the display unit mounting plate.
3. Lift the display unit up and away from the backbox. Two rivets at the bottom of the
cover will prevent you from lifting it straight up.
4. Unplug the ribbon cable from the back of the display unit to disconnect the power
supply.
5. Set the display unit aside.
6. Prepare the clock’s position in the wall:
The power supply backbox measures 12 inches (30.5 cm) wide by 6 inches (15.2 cm)
high by 3-3/8 inches (8.6 cm) deep.
The wall mount cover measures 13 inches (33 cm) wide by 7 inches (17.8 cm) high
by 1-1/4 inch (3.2 cm) deep, and extends ½ inch (1.8 cm) around the backbox.
Cut a 12-1/4 inch (31.1 cm) by 6-1/4 inch (15.9 cm) hole in the wall between two
studs where you want to hang the master clock.
7. Cut two blocks of wood for filler and attach them to the studs.
8. Screw the power supply box to the blocks using the two holes on each side of the box.
9. Wire the clock. (See Wiring the Master Clock on page 1-8.)
10. Reconnect the ribbon cable.
11. Replace the display unit using the two screws removed in step 2.
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24A715/24A715M Master Clock Installation Manual