16
Installation and Maintenance Instructions
Models 151XST and 151XST-S
SHOCK HAZARD—High voltages are present inside the light
assembly. Wait at least 5 minutes after shutting off the power
before servicing this unit.
Establishing a regular maintenance and inspection schedule
extends the life of the Model 151XST and ensures safety. For
service, support, or replacement parts, see pages 19 and 20.
Replacing the Flash Tube
As strobe lights are used, the flash tubes begin to darken,
causing the light output to decrease. This darkening is
characteristic of flash tubes. Darkening will begin near the base
of the tube and progress upward. Also, as flash tubes age, they
may have a tendency to misfire (not fire periodically).
After extended operation, occasionally check for flash tube
degradation. Should the flash tube misfire, have a noticeable
decrease in light output, glow continuously or darken to a
point beyond that shown in Figure 4 on page 17, it should be
replaced.
To replace the flash tube:
1.
Disconnect power to the beacon and wait at least 5 minutes
to allow all capacitors to discharge.
2.
Remove the threaded dome assembly by twisting it
counterclockwise.
3.
With the dome removed, gently pull the flash tube from its
socket. A rocking motion is most helpful when installing or
removing the tube.
4.
Replace the flash tube. Ensure that the replacement tube is
fully seated in the socket.
5.
Replace the globe assembly. Ensure that the globe
assembly is seated securely against the gasket.
