mounted dome down, condensation may occur in the conduit system. Use properly rated conduit
seals/drains to prevent moisture from entering the fixture. Thread the fixture onto the 3/4" pipe
and secure with the set screw.
The dome guard (Part #K8449090) may be used as an accessory. It is mounted on the 154XST
using the two supplied #8-32 screws. Adjust the tension on the screws until the dome guard is
square with the housing.
C. Electrical Connections.
WARNING
This is a four-wire device, and when installed, all four wires must be terminated. Failure to terminate
both red and both black wires will result in a shock or fire hazard.
The 154XST unit is provided with four leads; two red, and two black. To achieve electrical
supervision, connect one red (+) lead to the positive side of the incoming power source and the
other red (+) lead to the outgoing power source. Likewise, connect one black (–) lead to the
negative side of the incoming power source, and the other black (–) lead to the negative side of
the outgoing power source.
If required, the green screw in the housing is provided for connection to an earth ground (see
figure 1). To gain access to the screw, the power supply assembly can be removed. Globe
removal is described in paragraph III.A.1.
NOTE
This unit is polarity sensitive, and may be damaged by incorrect electrical hookup. Polarity must be
observed for proper operation. In addition, damage will result if the voltage rating is exceeded.
III. MAINTENANCE.
WARNING
To prevent ignition of hazardous atmospheres, disconnect the fixture from the supply circuit
before opening. Keep tightly closed when in operation.
SAFETY MESSAGE TO MAINTENANCE PERSONNEL
Listed below are some important safety instructions and precautions you should follow:
• Read and understand all instructions before operating this system.
• Any maintenance to the light system must be done with the power turned off.
• Any maintenance to the light system must be performed by a trained electrician in accordance with
NEC Guidelines and local codes.
• Never alter the unit in any manner. Safety in hazardous locations may be endangered if additional
openings or other alterations are made in units specifically designed for use in these locations.
• The nameplate, which may contain cautionary or other information of importance to maintenance
personnel, should not be obscured if exterior of housings used in hazardous locations are painted.
• Broken globes can lead to explosions which could result in serious injury or death. If the globe is
damaged in any way, the complete globe assembly MUST be replaced.
• The only electrical components to be replaced by the customer are the flash tube and the circuit
board assembly.
A. Flash Tube Replacement.
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 2, it should be replaced.
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