Lathem Airtime AT-DDC4 - Manual (Page 3)

Page 1
Introduction
The AirTime AT-DDC Wireless Digital Display Wall Clock is designed with
a 4-inch red LED display that can be viewed from distances over 100
feet. The bright red display shows the hour and minutes and can be
configured for a 12 or 24 Hour format.
The AT-DDC Wall Clock is synchronized by a Lathem ATX series
transceiver’s wireless correction signal.
The AT-DDC Wall Clock can be mounted directly to a wall, to a single
gang outlet box or, with optional mounting kits, as double-faced units
from the wall or ceiling.
Clock Operation
When the AT-DDC Wall Clock is connected to 110vAC power, the clock
displays 12:00 AM and begins listening for a signal from an ATX series
transceiver. Upon reception of the AirTime signal, (verified by a red
LED flashing in the lower right corner), the clock will adjust to the
correct time. The clock will continue to listen and correct itself as
needed.
Power Cord Installation
A 3 wire grounded power cord is required. If the power cord will not be
in conduit, secure the power cord with a cable clamp into the selected
vent cap.
Remove the two phillips head screws from the left or the right end cap
and remove. Slide the circuit board out of the case. Carefully flip the
circuit board over and lay it face down on a clean, smooth work
surface. Remove one of the vent caps from the case of the wall clock
and route the power cord through it to the back of the circuit board. (If
the power cord will be routed through the back of the clock using
conduit, route the cord through the gang box and conduit access hole
to the back of the circuit board assembly). Strip away 1/2" of the
protective shield from each wire of the power cord. Locate the two
black wires leading from the back of the circuit board. Using wire nuts,
attach the AC In line of the cord to one and the AC Return line to the
other (normally black is AC In and white is AC Return). Attach the
ground wire of the cord, (normally green) to the green ground screw
located on the inside back of the case. Slide the circuit board back into
the case, replace the end cap and secure with the two phillips head
screws.