Federal Signal 371ST-250 Installation Guide

MODEL 371ST-250

INSTALLATION AND SERVICE INSTRUCTIONS

FOR COMMANDER

MODEL 371ST-250 STROBE LIGHTS

®

Address all communications and shipments to:

FEDERAL SIGNAL CORPORATION

Electrical Products Division
Service Department
2645 Federal Signal Drive
University Park, IL 60466-3195

INSTALLATION AND SERVICE INSTRUCTIONS

FOR COMMANDER

MODEL 371ST-250 STROBE LIGHTS

SAFETY MESSAGE TO INSTALLERS,

USERS AND MAINTENANCE PERSONNEL

It is important to follow all instructions shipped with this product. This device is to be installed by
a trained electrician who is thoroughly familiar with the National Electric Code/Canadian Electric
Code and will follow the NEC/CEC Guidelines as well as local codes.

The selection of mounting location for the device, its controls and the routing of the wiring is to be
accomplished under the direction of the facilities engineer and the safety engineer. In addition,
listed below are some other important safety instructions and precautions you should follow:

• Read and understand all instructions before installing or operating this equipment.

• Do not connect this light to the system when power is on.

• After installation, ensure that the threaded dome ring joint is fully engaged.

• After installation, test the light system to ensure that it is operating properly.

• After testing is complete, provide a copy of this instruction sheet to all operating personnel.

• Establish a procedure to routinely check the light installation for integrity and proper operation.
Failure to follow all safety precautions and instructions may result in property damage, serious

injury, or death to you and others.

I. INSTALLATION.

A. Unpacking.

After unpacking the light, examine it for damage that may have occurred in transit. If the
equipment has been damaged, do not attempt to install or operate it. File a claim immedi­ately with the carrier stating the extent of the damage. Carefully check all envelopes,
shipping labels, and tags before removing or destroying them.

B. Mounting (see figure 1).

The Model 371ST lights are designed for mounting on a flat horizontal surface or on a 1" NPT
pipe. For surface mounting on solid substrates, a separately purchased Model 371BRCKT (3­point mounting bracket) may be used. If conduit side entries are to be used, disassemble light
as described in section I.D.1 and remove knockout(s) with a blunt tool prior to mounting light.
Use a file to remove excess flash around the knockout.

1. Pipe Mounting.

a. Attach light to pipe by turning clockwise.

b. Refer to section D for information on making electrical connections.

2. Surface Mounting.

a. Using the gasket as a template, scribe four drill position marks on the mounting surface.

Drill a 9/32” (7.1mm) diameter hole at each of the outside drill position marks for
mounting. Drill or punch a 1-3/8” (34.9mm) diameter hole at the center drill position
mark for wire entry.

b. Attach 1” NPT conduit or suitable user supplied 1” NPT hub or connector to conduit

entrance in bottom of light.

c. Set light on gasket and attach to the mounting surface using the provided 1/4” screws

and washers.

d. Refer to section D for information on making electrical connections.

®

C. Specifications.

Operating Voltage 225-300 VDC
Operating Current 0.25A
Energy Output 10.0 Joules
Flash Rate 60 FPM
Environmental Ratings Type 4X, IP66

D. Electrical Connections (see figure 2).

The model 371ST comes assembled from the factory. Models are supplied with a two power
leads for wiring to the supply circuit. If conduit side entries are to be used or if the housing is
to be used as a junction box perform the following steps:

WARNING

To avoid electrical shock hazards, do not connect to supply circuit when power is
applied.

1. Disassemble the light as follows:
a. Remove dome assembly by grasping the die-cast ring attached to the dome and turning

it counter-clockwise.

b. Remove three #10 hex head screws that secure strobe-spinning assembly to housing.

c. Remove strobe-spinning assembly.

2. If conduit side entries are to be used, attach either Myers STNTB-2 or T&B H075-TBH 3/4"
N.P.T. conduit hub with 3/4" N.P.T. close nipple (all user-supplied) to housing and tighten
securely. When side entries are used, the bottom 1" NPT conduit entry must be plugged
with a threaded plug (user-supplied).

3. Route supply wires (12AWG to 16AWG) into housing. Connect the red (+) lead to the
positive power source lead and the black (-) lead to the negative power source lead.

NOTE

Polarity MUST be observed for proper operation.

4. Re-assemble the light and test for proper operation.

II. MAINTENANCE.

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/CEC Guidelines and local codes.

• Never alter the unit in any manner. Safety may be endangered if additional openings or other
alterations are made to units.

• The nameplate, which contains cautionary or other information of importance to maintenance
personnel, should not be obscured.

• If the dome is damaged in any way, the complete dome assembly MUST be replaced.

• After performing any maintenance, test the light system to ensure that it is operating properly.

A. Flashtube Replacement (see figure 3).

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- replacement
is necessary.

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