WARNING
High voltages are present inside the light assembly. Wait at least 5 minutes after shutting off
the power before servicing this unit.
To change the flash tube, proceed as follows:
1. To remove the globe assembly, grasp the metal ring attached to the globe and turn it counter-
clockwise. If the globe assembly will not unscrew, place a screwdriver blade against one of
the four bosses on the metal ring attached to the globe. Gently tap the screwdriver handle to
loosen the globe assembly from the base casting.
WARNING
To maintain effectiveness of hazardous location enclosure, do not damage globe or threads while
disassembling or reassembling unit. Lubricated threaded joints exposed for long periods of time may
attract small particles of dirt or other foreign materials. Body and cover joints should be reassembled
immediately, with all threads fully engaged.
2. With the globe removed, gently pull the flash tube from its socket. A rocking motion is most
helpful when installing or removing the tube.
3. Replace the flash tube with Federal Signal Part No. K149122. Ensure that the replacement
tube is fully seated in the socket.
4. Replace the globe assembly. Ensure that the globe assembly is seated securely against the
gasket.
5. Test the light for proper operation.
B. Power Supply Replacement.
WARNING
High voltages are present inside the light assembly. Wait at least 5 minutes after shutting off the
power before servicing this unit.
1. Remove the globe assembly as described in paragraph III.A.1.
2. Remove and retain the screw which secures the power supply circuit board to the housing.
3. Disconnect the power connector from the old power supply and connect it to the connector on
the new power supply.
NOTE
Ensure that the connector is fully seated on the circuit board connectors.
4. Secure the new power supply to the housing with the previously removed screw.
5. Install the new flash tube in the socket. Ensure that the flash tube is fully seated in the socket.
6. Replace the globe assembly. Ensure that the globe assembly is seated securely against the
gasket.
7. Test the light for proper operation.
C. Cleaning Enclosure.
NOTE
Maintenance procedures sometimes require fixtures to be hosed down for good housekeeping.
The fixture should be cleaned periodically to maintain maximum light output. Only mild, non-
abrasive cleaning agents should be used. The water force applied by a hose must not exceed 65
gallons per minute from a 1" diameter hose at a distance of 10 feet. The glass globe should be
regularly inspected for scratches and chips, and, if damaged, must be replaced.
D. Lubrication.
Threaded joints should be well lubricated with petroleum or a soap-thickened mineral oil. If
corrosive products have accumulated on joints and cannot readily be removed with solvents, the
parts should be discarded and replaced.
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