Federal Signal 121, 121A, 121S Installation Guide

MODEL 121, 121A, & 121S

INSTRUCTION SHEET

FOR

FEDERAL MODEL 121, 121A, AND 121S VITALITE® ROTATING LIGHT

MODELO 121, 121A, & 121S

HOJA DE INSTRUCCIONES

PARA

¨

LUZ ROTATORIA VITALITE

MODELOS 121, 121A Y 121S DE FEDERAL

MODÈLE 121, 121A, & 121S

FEUILLET D’INSTRUCTION POUR

LE GYROPHARE VITALITE

FEDERAL, MODÈLES 121, 121A ET 121S

Address all communications and shipments to:

Dirija todas la correspondencia y envíos a:

Adressez toutes les communiations et expéditions à:

FEDERAL SIGNAL CORPORATION
Electrical Products Division

2645 Federal Signal Drive
University Park, IL 60466-3195

INSTRUCTION SHEET FOR FEDERAL MODELS 121 (12VDC),

121A (12VDC AND 24VDC), AND 121S (120VAC)

VITALITE® ROTATING LIGHTS

SAFETY MESSAGE TO INSTALLERS

NOTE

Installation, maintenance and disposal of this product must be carried out in
accordance with national codes and standards.

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 and will follow all
applicable national and local codes in the country of use.

This device should be considered a part of the warning system and not the entire
warning system.

The selection of the 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 all set screws are properly tightened.

• 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 or others.

I. GENERAL

Model 121 is only available for 12Vdc.
Model 121A is available for 12Vdc and 24Vdc.
Model 121S is available for 120Vac, 50/60 Hz.

II. UNPACKING.

After unpacking the unit, 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.

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III. INSTALLATION.

A. Model 121.

1. Roof Mounting.

magnetic mounting base and is equipped with a plug that fits in a standard cigarette lighter

The Model 121 is designed for vehicular and portable use. It comes with a

socket. If the light is used outdoors, it MUST be mounted with the dome up.

Because vehicle roof construction and driving conditions vary, Federal does not

recommend driving a vehicle with a magnetically mounted warning light installed.

The light could fly off the vehicle causing injury or damage. Repair of damage

incurred because of ignoring this warning shall be the sole responsibility of the

user.

Holding power of magnetic mounting systems is dependent upon surface finish,

surface flatness, and thickness of the steel mounting surface. Therefore, to promote

proper magnetic mounting:

• Mounting surface and magnets must be kept clean, dry, and free of foreign
particles that prevent good surface contact.

• Ensure that mounting surface is flat.

• Magnet mounting system should not be used on vehicles with vinyl tops.

• To prevent sliding of light assembly on mounting surface, quick acceleration
and hard stops should be avoided.

• If the light is to be held directly to the roof by the magnet, ensure that the
power cable is not under the magnet.

2. Dashboard Mounting.

When installing equipment inside air bag equipped vehicles, the installer MUST
ensure that the equipment is installed ONLY in areas recommended by the vehicle
manufacturer.

Failure to observe this warning will reduce the effectiveness of the air bag, damage
the air bag, or potentially damage or dislodge the equipment, causing serious
injury or death to you or others.

a. The vinyl cover is provided for use with the light when it is semi-

permanently mounted behind the windshield on the dash of the vehicle.

b. Use the dash mounting plate provided if the dash is made of non-ferrous

material. Tape or screw the plate to the dash.

c. If the dash is narrow or drops at a sharp angle, fabricate an angle

bracket and fasten it to the dashboard so that the light is level. Screw
the mounting plate to the bracket. If steel is used to fabricate the
mounting bracket, it is not necessary to secure the mounting plate to the
bracket. Mount the light directly on the bracket.

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B. Models 121A and 121S.

or vertical surface or on a 1/2" NPT threaded pipe. Mounting on a vertical surface with the

Models 121A & 121S rotating lights are designed for mounting on a flat horizontal

lens positioned upward can be accomplished using a separately purchased Federal Signal
wall (Model LWMB2) or corner (Model LCMB2) mounting bracket.

1. Pipe Mounting.

Models 121A & 121S can be mounted on 1/2 inch pipe. Mounting hardware

and installation details are left to the installer.

NOTE

To prevent the connection from loosening, tighten the fixture to a MINIMUM
torque of 5 ft.-lbs. (6.8N m) after threading it onto the pipe.

2. Surface Mounting.

a. Using the gasket as a template, scribe the three mounting holes and the

center hole for surface mounting. Drill a 3/16" (4.8 mm) diameter hole at
each of the three scribed mounting marks. Drill or punch a 1" (25.4 mm)
diameter hole at the center for the wires.

b. Set the light on gasket and attach to the mounting surface using the

provided #8-32 screws.

c. Refer to paragraph E. for electrical connections.

IV. ELECTRICAL CONNECTIONS.

A. Model 121 12VDC.

The Model 121 is equipped with a plug that fits in standard cigarette lighter

sockets.

NOTE

Center contact on the cigarette plug is the (+) positive power lead. Polarity MUST
be observed for operation.

B. Model 121A 12 and 24VDC.

The Model 121A direct current unit is supplied with two leads (one red and one

black). Connect the red (+) lead to the positive power source terminal and the black (-) to the
negative power source terminal.

NOTE

Polarity MUST be observed for operation.

C. Models 121S 120 VAC.

Do not connect if supply wires are energized.

The 121S alternating current units are supplied with three leads (one black, one

white, and one green/yellow) for the AC units. Connect the black lead to the phase side of the

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power source, the white lead to the common (neutral) side of the power source, and the green/
yellow lead to earth ground.

NOTE

The 120 VAC units are designed to operate on both 50 and 60Hz electrical power.
Special modifications are NOT required for the two different AC line frequencies.

V. 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 all applicable national and local codes and
standards in the country of use.

• Never alter the unit in any manner.

• The nameplate, which may contain cautionary or other information of
importance to maintenance personnel, should NOT be obscured in any way.
Ensure that the nameplate remains readable when the housing’s exterior is
painted.

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

Failure to follow all safety precautions and instructions may result in property damage,

serious injury, or death to you or others.

A. Lamp Replacement.

To replace the lamp, proceed as follows:

1. Disconnect power and allow the lamp to cool.

2. Remove the screw located at the bottom of the dome.

3. Grasp the top of the dome and push down while turning the dome counter-

clockwise approximately 3/4-inch.

4. Gently lift the dome away. Ensure the gasket between the dome and base is

not lost.

Always wear gloves and eye protection when replacing lamps.

5. Grasp the lamp, as close the base as possible, and gently push toward the

socket while turning counter-clockwise. Insert the new lamp, gently pushing
toward the socket while turning clockwise. Make sure not to leave any
residue on the lamp's glass.

6. Before replacing dome, ensure that the gasket is properly seated on the

housing base. Place the dome over the base, aligning the recesses inside the

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