Federal Signal Corporation 2-120, 2-240 Description, Specifications, Installation, Operation, And Service Manual

Models 2-120 and 2-240

Omni-Directional Siren

Description, Specications, Installation,

255154
Rev. R1 0719
Printed in U.S.A.

© Copyright 2005-2019 Federal Signal Corporation

Operation, and Service Manual

Limited Warranty

This product is subject to and covered by a limited warranty,
a copy of which can be found at www.fedsig.com/SSG-Warranty.
A copy of this limited warranty can also be obtained by written
request to Federal Signal Corporation, 2645 Federal Signal Drive,
University Park, IL 60484, email to [e-mail] or
call [phone].

This limited warranty is in lieu of all other warranties, express or
implied, contractual or statutory, including, but not limited to the
warranty of merchantability, warranty of tness for a particular
purpose and any warranty against failure of its essential purpose.

2645 Federal Signal Drive
University Park, Illinois 60484-3167

www.fedsig.com

Customer Support 800-548-7229 • [phone]
Technical Support 800-524-3021 • [phone]

All products indicated are trademarks of Federal Signal Corporation.

All other product names or trademarks are properties of their respective owners.

Contents

Safety Messages......................................................................................................................................................5

General Description ................................................................................................................................................7

Siren Description ................................................................................................................................................. 7

Controls Description ............................................................................................................................................ 7

Models RC2W-120 (120 Vac) and RC2W-240 (240 Vac) ...........................................................................7

Models FC (One-way status) or FCTB (Two-way status) Controllers .........................................................7

Signal Description ............................................................................................................................................... 8

Ordering Products ................................................................................................................................................... 9

Specications ..........................................................................................................................................................9

Installation ..............................................................................................................................................................10

Determining a Suitable Location ....................................................................................................................... 10

Installing the Siren ............................................................................................................................................ 11

Pole Installation .........................................................................................................................................12

Flat Surface Mount ....................................................................................................................................14

Electrical Connections ......................................................................................................................................17

Pre-operation Checkout .................................................................................................................................... 19

Circuit Description ................................................................................................................................................19

Service and Maintenance......................................................................................................................................20

Testing and Inspecting the Siren ....................................................................................................................... 20

Inspecting the Motor Brushes ...................................................................................................................20

Corrective Maintenance .................................................................................................................................... 20

Troubleshooting ........................................................................................................................................20

Model 2 Motor Brush Replacement ..........................................................................................................21

Model 2 Armature and Field Replacement................................................................................................21

Replacement Parts ................................................................................................................................................27

Getting Service ......................................................................................................................................................27

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

3

Tables

Table 1 Ordering Product ........................................................................................................................................ 9

Table 2 Optional Accessories ................................................................................................................................. 9

Table 3 Specications ............................................................................................................................................. 9

Table 4 Sound levels predictions ......................................................................................................................... 10

Table 5 Troubleshooting .......................................................................................................................................21

Table 6 Model 2 Siren Parts List ........................................................................................................................... 25

Table 7 Models RC2W-120 and RC2W-240 Siren Remote Control Parts List ................................................... 26

Table 8 Replacement Parts ................................................................................................................................... 27

Figures

Figure 1 Signal Characteristics .............................................................................................................................. 9

Figure 2 Mounting Plate Drilling Detail ................................................................................................................12

Figure 3 Typical Model 2 Pole-Mounted Installation .......................................................................................... 14

Figure 4 Typical Model 2 Platform Mount ............................................................................................................ 16

Figure 5 Contactor Wiring for Model 2 using 120 Vac .......................................................................................17

Figure 6 Contactor Wiring for Model 2 using 240 Vac .......................................................................................18

Figure 7 Model 2 Field Removal ........................................................................................................................... 22

Figure 8 Model 2 Field Replacement ...................................................................................................................23

Figure 9 Model 2 Parts Index ................................................................................................................................ 24

Figure 10 Model RC2W Parts Index .....................................................................................................................26

Models 2-120 and 2-240

4

Federal Signal www.fedsig.com

Safety Messages

It is important to follow all instructions shipped with this product. This device is to be
installed by trained personnel who are thoroughly familiar with the country electric codes
and will follow these guidelines as well as local codes and ordinances, including any
state or local noise control ordinances. Listed below are important safety instructions and
precautions you should follow:

Important Notice

Federal Signal reserves the right to make changes to devices and specications detailed in

the manual at any time in order to improve reliability, function or design. The information
in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for any inaccuracies.

Publications

Federal Signal recommends the following publications from the Federal Emergency
Management Agency for assistance with planning an outdoor warning system:

Safety Messages

• The “Outdoor Warning Guide” (CPG 1-17)

• “Civil Preparedness, Principles of Warning” (CPG 1-14)

• FEMA-REP-1, Appendix 3 (Nuclear Plant Guideline)

• FEMA-REP-10 (Nuclear Plant Guideline).

Planning

• If suitable warning equipment is not selected, the installation site for the siren is
not selected properly or the siren is not installed properly, it may not produce the
intended optimum audible warning. Follow Federal Emergency Management Agency
(FEMA) recommendations.

• If sirens are not activated in a timely manner when an emergency condition
exists, they cannot provide the intended audible warning. It is imperative that
knowledgeable people, who are provided with the necessary information, be
available at all times to authorize the activation of the sirens.

• When sirens are used out of doors, people indoors may not be able to hear the
warning signals. Separate warning devices or procedures may be needed to
effectively warn people indoors.

• The sound output of sirens is capable of causing permanent hearing damage. To
prevent excessive exposure, carefully plan siren placement, post warnings, and
restrict access to areas near sirens. Review and comply with any local or state noise
control ordinances as well as OSHA noise exposure regulations and guidelines.

• Activating the sirens may not result in people taking the desired actions if those to
be warned are not properly trained about the meaning of siren sounds. Siren users
should follow FEMA recommendations and instruct those to be warned of correct

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

5

Safety Messages

• After installation, service, or maintenance, test the siren system to conrm that it is

• If future service and operating personnel do not have these instructions to refer to,

Installation and Service

• Electrocution or severe personal injury can occur when performing various

actions to be taken.

operating properly. Test the system regularly to conrm that it will be operational in

an emergency.

the siren system may not provide the intended audible warning and service personnel
may be exposed to death, permanent hearing loss, or other bodily injury. File these
instructions in a safe place and refer to them periodically. Give a copy of these
instructions to new recruits and trainees. Also give a copy to anyone who is going to
service or repair the siren.

installation and service functions such as making electrical connections, drilling
holes, or lifting equipment. Therefore only experienced electricians should install
this product in accordance with national, state and any other electrical codes having
jurisdiction. Perform all work under the direction of the installation or service crew
safety foreman.

• The sound output of sirens is capable of causing permanent hearing damage. To
prevent excessive exposure, carefully plan siren placement, post warnings and
restrict access to areas near the sirens. Sirens may be operated from remote control
points. Whenever possible, disconnect all siren power including batteries before
working near the siren.

• After installation or service, test the siren system to conrm that it is operating
properly. Test the system regularly to conrm that it will be operational in an

emergency.

• If future service personnel do not have these warnings and all other instructions
shipped with the equipment to refer to, the siren system may not provide the intended
audible warning and service personnel may be exposed to death, permanent hearing
loss, or other bodily injury. File these instructions in a safe place and refer to them
periodically. Give a copy of these instructions to new recruits and trainees. Also, give
a copy to anyone who is going to service or repair the sirens.

Operation

Failure to understand the capabilities and limitations of your siren system could result in
permanent hearing loss, other serious injuries or death to persons too close to the sirens
when you activate them or to those you need to warn. Carefully read and thoroughly
understand all safety notices in this manual and all operations-related-items in all
instruction manuals shipped with equipment. Thoroughly discuss all contingency plans
with those responsible for warning people in your community, company, or jurisdiction.

Read and understand the information contained in this manual before
attempting to install or service the siren.

Pay careful attention to the notice located on the equipment.

6

Federal Signal www.fedsig.com

Models 2-120 and 2-240

General Description

This manual describes the characteristics, specications, installation for the siren as

well as the additional information required to operate, service, and maintain the control
system.

The Federal Signal Model 2 outdoor warning sirens are omni-directional sirens that are
capable of producing high-intensity warning signals over a large area. Federal Signal
provides mounting hardware that enables you to install a siren on a utility pole or on the
roof of a building. As a result, the siren can be installed in almost any situation. The high

efciency of these siren models enables them to produce a high sound level while making

moderate demands on the power source.

Siren Description

The Model 2 Siren is a 102 dB single tone siren.

The Model 2 siren mechanism is enclosed in a sheet metal housing. A conical dome is
mounted on the top of the housing and two truncated conical cowls are attached to the
housing, approximately one-third and two-thirds along the height of the housing.

General Description

A Model RC2W Motor Starter is required to operate the siren. The Model 2 uses a 120­or 240-volt universal motor that can operate from either DC or 25-60 Hz single-phase

AC.

The mechanism of all siren models covered in this manual consists of a vertically
installed motor with a stator attached to the motor housing, and a rotor mounted on the
drive shaft concentric to the stator. The rotor and stator each contain at least one row
of ports. As the motor rotates the rotor, air is drawn through an intake tube and passes
through the rotor and stator ports in pulses. These pulses are produced because the
rotor alternately opens and closes the stator ports. The pulses of air produce sound at a
frequency (pitch) that is dependent on the instantaneous rotational speed of the motor and
the number of ports in the rotor-stator combination.

A Model RC2W Motor Starter is required to operate the siren. The Model 2 uses a 120­or 240-volt universal motor that can operate from either DC or 25-60 Hz single-phase
AC.

Controls Description

Models RC2W-120 (120 Vac) and RC2W-240 (240 Vac)

The Model RC2W Motor Starters are basically heavy-duty relays that are required for the
starting and operating current of a Model 2 siren. The RC2W is enclosed in a NEMA type
3R enclosure. The unit must be installed on a vertical surface.

Models FC (One-way status) or FCTB (Two-way status) Controllers

The FC or FCTB siren controllers provide RF and/or wire line control of individually
programmable timing cycles for contact closure outputs. The versatility of the FC
Controller makes it an ideal choice for virtually all siren control applications or any other
process that can be controlled through relay contacts.

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

7

General Description

The microprocessor-based controller contains the following features:

• Synthesized Radio Receiver (Low Band, High Band, or UHF — three separate

models)

• Two-Tone and DTMF Decoders

• Up to four Individually Programmable Output Relays

• Siren Tone Generator

• Push Buttons for Local Control

• Contact Closure Inputs for Land Line Control

• RS232 Programming Port

• Diagnostic LEDs

• Programmability

All functions of the FC Controller are programmable from a current Windows compatible
computer with an RS232 port using FSPWARE or Commander® Software System

(Commander). The software allows easy conguration, uploading and downloading of

control programs.

Programming options include:

• Radio Receiver Frequency

• Single and Two-Tone Sequential Decode Tones and Tone Lengths

• DTMF Decode Digits

• Output Relay Timing Patterns

• Tone Generation Frequencies and Durations

You can program up to six (6) control timing sequences into the controller. You can
choose standard siren control timings or design custom relay output timings. You can
activate the control functions from any combination of six (6) Single Tone, Two-Tone
Sequential and/or DTMF tones. You can also initiate timing sequences using the local
buttons and contact closure inputs.

Conguration programs are stored in nonvolatile E2 memory to ensure retention even

during a complete power failure.

Signal Description

The sirens are capable of producing a steady single frequency signal, a wailing rising
and falling frequency signal and a fast wailing signal. The steady signal is frequently
used as a civil defense “Alert” or weather emergency signal. The wailing signal is often

used as a civil defense “Attack” signal. The fast wail or re signal is used as a re signal
to summon the local re department. You can use any of the signals for any desired
application. These signals are shown graphically in the following gure.

8

Federal Signal www.fedsig.com

Models 2-120 and 2-240

Figure 1 Signal Characteristics

STEADY SIGNAL "ALERT"

WAILING SIGNAL "ATTACK"

Ordering Products

Ordering Products

Contact our Federal Signal Sales Engineers to design a system that meets your specic

requirements.

Table 1 Ordering Product

Part Number Description

2-120 120 Vac/dc, 102 dBc, Roof mount standard

2-240 240 Vac/dc, 102 dBc, Roof mount standard

RC2W-120 120 V Motor Starter

RC2W-240 240 V Motor Starter

Table 2 Optional Accessories

Part Number Description

PMS Pole Mounting Stand

FSPWARE Federal Signal programming software (Non-digital applications)

FC Controller with FC Control Board

FCH Controller with one-way High-band (150-172 MHz) radio receiver

FCU Controller with one-way UHF band (450-470 MHz) radio receiver

AUX1 SIGNAL "FIRE"

291A134A

Specications

Table 3 Specications

Power Requirements 120 Vac/dc, single-phase 24 A

or 240 Vac/dc, single-phase 12 A

Power 2 HP

Top Frequency - Single Tone 533 Hz (60 Hz) or 444 Hz (50 Hz)

Sound Output 102 dBC at 100 ft (30.5 m - Model 2)

Motor Type Single phase ball bearing, universal series 120 Vac/dc,

or single phase ball bearing universal series 240 Vac/dc

Height 25.5 inches (65 cm)

Diameter 18 inches (46 cm)

Net Weight 59 lb (27 kg)

Shipping Weight 85 lb (36 kg)

Operating Temperature -22°F to 149°F (-30°C to 65°C)

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

9

Installation

Installation

Electrocution or severe personal injury can occur when making electrical
connections, drilling holes, or lifting equipment. Therefore, installation should
be performed by experienced electricians in accordance with national and
local electrical codes and ordinances, including any state or local noise control
ordinances.

Determining a Suitable Location

The output level of an the sirens are capable of causing permanent hearing
damage. To prevent excessive exposure, carefully plan the siren location and
post warnings where excessive levels may be encountered. Refer to OSHA 29
CFR 1910.95 for safe exposure limits.

Do not expose personnel to sound levels above 123 dBC.

Careful consideration of the factors affecting the propagation of sound from the siren
and the response of the human ear to the sound will optimize the ability of the siren
to effectively warn the community. Follow Federal Emergency Management Agency
(FEMA) guidelines when designing the warning system.

The reduction of signal intensity as distance from the siren increases and the minimum
desired signal level at the fringe of the area to be covered are important considerations
when choosing a siren installation site. As the distance from the siren increases, sound
level losses accumulate. These losses are a result of weather conditions, the terrain,
obstructions in the sound path, and the pitch of the sound and the height of the siren.

Optimum sound propagation conditions occur when no obstructions exist in the sound

path, the terrain is hard and at, and the air is blowing away from the source. Under these

conditions, you can expect a 6 dB loss per distance doubled. A loss per distance doubled
of 10 dB is typically experienced because atmosphere is rarely calm, terrain may not be

at, and buildings or other obstructions are frequently present in the sound path.

Using a 10 dB per distance doubled loss factor, the following sound levels are predicted
for the sirens in the following table.

Table 4 Sound levels predictions

Distance Model 2

100 feet (30.5 m) the sound level is 102 dB

200 feet (61 m) the sound level is 94 dB

400 feet (122 m) the sound level is 86 dB

10

Federal Signal www.fedsig.com

Models 2-120 and 2-240

Installation

FEMA studies indicate typical ambient sound levels vary by location as follows:

• Industrial Areas: 70+ dBC

• Urban Areas: 60 dBC

• Rural Areas: 50 dBC

Assuming a typical 10 dB loss per distance doubled and a 70 dB minimum sound level
required to warn a typical industrial area, the effective range for a Model 2 Siren is
approximately 910 feet (278 meters).

Optimum warning is obtained when the warning signal is at least 10 dB above ambient.
Do not expose personnel to sound levels above 123 dBC.

Wind speed and direction often affects the propagation of sound from the siren.

Consequently, the direction of the prevailing wind may be a signicant factor to consider

when selecting the installation site(s) of a small, one or two site siren system. For
example, if the prevailing wind is from the west, it may be desirable to install the siren
toward the western edge of the area to be covered.

Other factors to consider when selecting the installation site(s) include the availability
of suitable electrical power, the access to and ease of installation and maintenance, the
height of surrounding obstructions, and security against vandalism.

Installing the Siren

Moving parts could cause severe cuts or amputation. DO NOT reach into the
siren openings.

Most siren installations are one of two types: Pole Mount or Flat Surface Mount. These

two congurations make it possible to install a siren in almost any situation. If the
installations in this manual are not suitable, modication of one of the congurations may

be practical.

A siren is typically installed 35 to 40 feet above the ground. If the installation is less
than 35 feet above the ground, the sound intensity at close range may increase, but the
effective range of the siren may be reduced. Conversely, if the siren is located more than
40 feet above the ground, the effective range of the siren may increase, but the sound
may skip over areas closer to the siren. These variables may make it desirable to test the
sound coverage of the siren at various heights and locations whenever possible. ALWAYS
ensure that the air intakes are clear when the siren is being tested and when it is installed

at its nal location.

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

11

Installation

Pole Installation

A Pole Mounting Stand (Model PMS) is required when mounting the Model 2 on a utility
pole. The PMS consists of a mounting plate, three angle iron legs, six 1/2-inch -13 by
2-inch hex head cap screws, six 1/2-inch-13 nuts, and six 1/2-inch lock washers.

To install the siren on a pole:

1. Uncrate the siren and remove the siren from the shipping base.

2. Attach the cast iron legs of the siren mechanism to the mounting plate using 3/8-inch

3. Set the siren housing over the siren mechanism on the mounting plate. Center the

Figure 2 Mounting Plate Drilling Detail

lock washers, nuts, and bolts through the three slots in the mounting plate. (See
Figure 2.)

housing over the mechanism. Attach the housing to the plate using aluminum clips,
1/4-inch lock washers, nuts, and bolts through the three 3/8-inch diameter holes. (See
Figures 2 and 10.)

120°

109.2°

3X Ø0.75 HOLE

EQUALLY SPACED

60.00°

R7.88

125.4°

R5.09

18.00

3X Ø0.38 HOLE
EQUALLY SPACED

3X 0.75 X 1.00 SLOT

R7.13

30.00°

125.4°

18.00

Ø1.50 HOLE

291190B

12

4. Lay the siren mechanism on its side and attach the three legs to the mounting plate
using three angle iron clips and six 1/2-inch-13 nuts and bolts. Attach the legs
through three 0.75-inch by 1-inch slotted holes indicated in Figure 2.

Federal Signal www.fedsig.com

Models 2-120 and 2-240

Installation

5. Dig the hole for the Class 2 utility pole and lay the pole on the ground as close as is
practical to the installation site.

6. With the siren lying on its side and the pole lying on the work surface, attach the
siren to the utility pole using at least two 5/8-inch lag bolts at least four inches long
(not supplied) for each leg. If necessary, install shims between the siren legs and the
pole.

7. Wrap a cable or chain capable of bearing at least one ton around the pole/siren
combination at least three times. Wrap the chain or cable around the legs of the siren.
Use the chain or cable in conjunction with a crane or hoist capable of lifting at least
one ton to erect the pole in accordance with accepted practice.

8. Install the Model RC2W Motor Starter and a fused disconnect switch in a location
on the pole that is readily accessible to service personnel but discourages vandalism.
The RC2W must be installed in a vertical position for proper operation. Install the
electrical devices following NEC recommendations and local electrical codes. A

suggested installation conguration is shown in Figure 3.

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

13

Installation

Figure 3 Typical Model 2 Pole-Mounted Installation

ANTENNA

WEATHER PROOF CABT.
TO HOUSE SIREN
MOTOR STARTER

FC UNIT

*

RIGID CONDUIT

Flat Surface Mount

Flat surface mount installation is practical when the installation site is on a at roofed

building. A weight distribution mat is often required to safely distribute the siren’s weight
on the roof. A Structural Engineer is required to specify the appropriate mounting method
to safely mount the siren on a roof.

*

CONTROL WIRING

*

FUSED DISCONNECT
SWITCH

*

6 Ga. GROUND WIRE

*

TWO 8 FOOT GROUND RODS
TO BE NO. 4 COPPER OR

GALVONIZED IRON, WITH
TWO CONTINUOUS NO.6
COPPER GROUND WIRES AND
CLAMPS, OR EQUIVALENT.

GROUND LINE

CUSTOMER SUPPLIED

*

291A124A1

14

Post high sound level warning signs at all roof entry points and be sure that the siren is
not blocked by parapets or other obstructions in the siren’s sound path.

Federal Signal www.fedsig.com

Models 2-120 and 2-240

Installation

Moving parts could cause severe cuts or amputation. DO NOT reach into the
siren openings.

To at surface mount the siren:

1. Center the siren mechanism on the mounting surface, and using the mounting
holes in the legs of the mechanism as a template, drill three 7/16-inch holes in the
mounting surface. (See Figure 4.)

2. Temporarily set the siren housing over the siren mechanism on the mounting plate.
Center the housing over the mechanism.

3. Using the housing and the aluminum clips as a template, drill three 1/4-inch holes
approximately equidistant around the circumference of the housing. Lift the housing
off the siren. It will be reinstalled later.

4. Mount the siren/base plate assembly on the mounting surface using lag bolts or
nuts and bolts as appropriate. Do NOT replace the housing on the siren. It will be
replaced later. If the siren is mounted directly on a roof (without a platform or weight
distribution mat), be sure to install waterproof joints where the mounting bolts pass
through the roof so that water does not enter the building.

5. Install the RC2W Motor Starter, fused disconnect switch, and other control
devices as close as is practical to the siren following local electrical codes and
NEC recommendations. If the siren is installed on the roof of a building, it may be
desirable to install the RC2W and other control devices inside the building. The unit
must be installed vertically to operate correctly. (See Figure 4.)

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

15

Installation

Figure 4 Typical Model 2 Platform Mount

16

"

"

Models 2-120 and 2-240

Federal Signal www.fedsig.com

Electrical Connections

NOTE: For the FC and FCTB controller connections see their installation manuals:
255294 and 255326.

Electrocution or severe personal injury can occur when making electrical
connections, drilling holes, or lifting equipment. Therefore, installation should
be performed by experienced electricians in accordance with national and
local electrical codes and ordinances, including any state or local noise control
ordinances

The power and control circuitry of a typical Model 2 installation is shown in Figures 5
and 6. The schematic diagram of the Model RC2W Motor Starter is also shown in the

gures.

The RC2W Motor Starter is provided with various size knockout holes. Some of the

knockouts can accommodate 1/2-inch conduit ttings, others can accept 3/4-inch conduit
ttings, and still others can accommodate 1-inch conduit ttings. These various sized

knockout holes are provided because electrical wiring requirements are frequently
unpredictable. The diameter of the conduit required for the installation depends on the
AWG size of the wiring used, the type of insulation on the wiring, and local electrical
codes. Therefore, be sure that the size of the conduit selected meets the requirements of
the installation.

Installation

Figure 5 Contactor Wiring for Model 2 using 120 Vac

N

L1

DISCONNECT

REMOTE INPUTS

FUNC#4

FUNC#3

FUNC#2

FUNC#1

SWITCH

(FUSED)

JP10

FC board

JP21 JP22

ROT.\BLOWER

CONTACTOR(S)

SPARE

SPARE N.C.

110/220VAC

MODEL 2 USING 120VAC

JUMPER WIRE

K101 MOTOR
STARTER

OVERLOAD
RELAY

V

2

HEATER

L1 N3

m

T1 T2

W

X2

SIREN MOTOR

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

17

Installation

Figure 6 Contactor Wiring for Model 2 using 240 Vac

L2

L1

DISCONNECT

REMOTE INPUTS

FUNC#4

FUNC#3

FUNC#2

FUNC#1

SWITCH

(FUSED)

JP10

FC board

JP21 JP22

ROT.\BLOWER

CONTACTOR(S)

SPARE

SPARE N.C.

JUMPER WIRE

110/220VAC

MODEL 2 USING 240VAC

V

2

HEATER

K101 MOTOR
STARTER

OVERLOAD
RELAY

L1 L23

m

T1 T2

W

X2

SIREN MOTOR

To connect the motor starter and siren to the power source and control circuitry: (See
Figures 5 and 6.)

NOTE: For wiring, see the FC, FCH, and FCU Models manual.

1. Install conduit between the RC2W and the electrical leads on the side of the siren

motor.

2. Install conduit between the RC2W and the disconnect switch.

3. Install conduit between the disconnect switch and the electrical power source. If the

siren is installed on a utility pole, add an entrance cap to the end of the conduit as
shown in Figure 3.

4. Route two wires of the proper size from T1 and T2 in the RC2W through the conduit
to the siren motor leads.

5. Route two wires of the proper size from L1 and L2 through the conduit to the power
disconnect switch.

6. Route two wires of the proper size from the disconnect switch to the power source.

7. Connect the FC Controller to terminals L1 and 3 in the motor starter. See Figures 5

and 6.

8. Replace the housing on the siren.

9. As a safety precaution to protect both personnel and equipment, it is highly

recommended that the siren and all control devices be solidly connected to an earth
ground. If the siren is installed on a building, ground the system to a metallic object

18

Models 2-120 and 2-240

Federal Signal www.fedsig.com

known to be grounded. For pole mounted installations, drive a metal rod or bar at
least two feet (61 cm) into the ground, or as close as practical to the base of the pole.
For maximum protection, use a separate, continuous 10 AWG or larger wire from the
siren frame to ground and the cabinet of each control device to ground.

Pre-operation Checkout

After the siren has been completely installed, perform the following checks before putting
the siren into service.

The output level of a siren is capable of causing severe hearing discomfort
or permanent hearing damage. Therefore, ALWAYS wear hearing protection
when performing tests or maintenance on the siren.

• Make sure that all air intakes and sound outlets are not obstructed.

• For local test activation see the FC, FCH, and FCU Models manual part number

255294.

• Check the operation of the control circuitry by initiating one or more signals from the

FC Controller.

Circuit Description

After the installation is complete and it has been established that the siren is operating
properly, Federal Signal recommends that all control devices be padlocked to discourage
tampering and vandalism.

Circuit Description

The Model RC2W is used to operate a Model 2 Siren.

The RC2W is a motor starter that switches the power to the Model 2 siren. The RC2W
requires a siren controller to provide Steady and Wail type siren signals typically used
for warning applications. The siren controller will hold a contact closed to activate the
RC2W for a Steady signal and will cycle the contact open and closed to create a Wail
signal. The RC2W also provides overload protection for the siren motor.

As shown in Figures 5 and 6, the motor starter includes an overload relay. The relay
protects the motor starter and the motor in the event that excess current is drawn. The

overload relay is activated when there is sufcient current through one or more of its

heaters to cause the heater(s) to expand enough to open the relay contacts. The opening
of the relay contacts opens the motor starter control circuit. As a result, the motor starter
de-energizes, protecting the circuit against damage. After the motor starter de-energizes,

the relay contacts reset automatically when the heater(s) cools sufciently. The overload

relay can also be reset manually after approximately one minute.

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

19

Service and Maintenance

Service and Maintenance

Service or maintenance should be performed by qualied personnel familiar

with the siren, associated controls, and power sources being used.

The siren has moving parts and high operating currents that could cause
severe personal injury, electrocution, or death. Before servicing or maintaining,
ensure that remote activation cannot occur and disconnect power to the siren
and its controls.

Testing and Inspecting the Siren

Test the siren for proper operation at least once a month. A daily test at noon, curfew, or
other selected time is preferred. This not only enhances the usefulness of the siren, but

also instills public condence in the reliability of the warning system.

In order to minimize the possibility of siren failure, inspection and maintenance at regular
intervals is desirable. Therefore, it is recommended to perform the following procedures
at least once a year. However, it may be necessary to increase the frequency of this
procedure if the siren is used frequently or if it is used in an extreme climate.

Inspecting the Motor Brushes

To inspect the motor brushes:

1. Remove the housing and inspect the motor brushes. Replace the brushes if necessary.

2. Inspect all electrical and mechanical connections. Make sure that all fasteners are

properly tightened.

3. Inspect the siren installation to be sure that it is vertically oriented. Take corrective
action if a pole mounted installation is more than 5 degrees from vertical or a roof or

at surface mount is more than 10 degrees from vertical to prevent lubrication losses

and excessive motor bearing wear.

4. Examine all painted surfaces. Repaint as necessary.

Corrective Maintenance

Troubleshooting

The Troubleshooting Table (Table 5) is provided to assist repair personnel when
troubleshooting a siren malfunction. This section also includes diagrams that may be
helpful if the siren or control devices need the be repaired.

20

Moving parts could cause severe cuts or amputation. DO NOT rotate the

commutator by sticking your ngers in the stator ports and pushing on any

part of the rotor.

Federal Signal www.fedsig.com

Models 2-120 and 2-240

Service and Maintenance

Table 5 Troubleshooting

Trouble Possible Cause Remedy

Siren motor inoperative Motor Starter overload relay

tripped

Open circuit between motor
starter and motor

Rotor Jammed Check rotor for free rotation.

Siren motor defective Check motor and repair or

Faulty overload heater(s) Replace

Motor starter
inoperative

Faulty motor starter control
winding

Motor starter overload relay
tripped

Faulty overload heater(s) Replace heater(s)

Open circuit between
disconnect switch and motor

Open circuit between control
equipment and motor

Faulty control device(s) Repair or replace as

Reset Relay

Check wiring for continuity

Remove material causing
jamming.

replace if necessary.

Replace coil

Reset relay

Check wiring for continuity.
Repair or replace wire as
necessary.

Check wiring for continuity.
Repair or replace wire as
necessary.

necessary

Model 2 Motor Brush Replacement

To replace the Model 2 motor brush:

1. Loosen the clips that hold the siren housing to the mounting surface. Lift off the
housing.

2. Remove the insulated cap from the Armature Brush Holder and slide out the worn
armature brush. Do not loosen or remove the brush holder.

3. Install the replacement brush and replace the cap. Ensure that the brush is properly
seated before tightening the cap. Make sure that the cap seats properly. However, do
not tighten the cap excessively, or it may break.

Model 2 Armature and Field Replacement

To replace the armature:

1. Turn off the power to the siren at the disconnect switch.

2. Remove the siren housing from the mechanism.

3. Disconnect the electrical power wiring from the siren motor.

4. Remove the mechanism from the mounting surface. If desired, the legs can also be

removed from the mechanism.

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

21

Service and Maintenance

5. Remove the four bolts holding the chopper rotor and armature to the stator. Lift out
the rotor and armature.

6. Remove the lock nut and lock washer from the armature.

7. Use a bearing puller to pull both roller bearings from the armature shaft.

8. Use a hydraulic press to separate the armature from the chopper rotor.

9. When installing a new armature, it may be necessary to change the electrical

connections of the eld. Therefore, refer to the instructions included with the
replacement armature for the correct eld connections.

10. Install the replacement armature and reinstall the siren following steps 1 through 8 in
reverse.

To replace the eld:

1. Turn off the power to the siren at the disconnect switch.

2. Remove the siren housing from the mechanism.

3. Disconnect the electrical power wiring from the siren motor.

4. Remove the siren mechanism from the mounting surface. If desired, the legs can also

be removed from the mechanism.

5. Remove the eld-retaining ring from the motor housing.

6. Arrange two spacers consisting of 4 x 4-inch (102 x 102 mm) lumber or similar

material, approximately 5 inches (127 mm) apart on a solid work surface as shown in
Figure 7.

7. Sharply rap the motor housing against the spacers several times until the eld drops

out of the motor housing. The motor housing is aluminum die-casting. As a result, it
can be broken or damaged. Therefore, use caution to ensure that the motor housing
strikes the spacers squarely as indicated in Figure 7.

Figure 7 Model 2 Field Removal

22

"

Federal Signal www.fedsig.com

Models 2-120 and 2-240

Service and Maintenance

NOTE: It is not necessary to follow the procedure described in steps 8 through 11 if a

hydraulic press is available to press the replacement eld into the motor housing.

8. Fabricate two 8-inch (203 mm) guide pins from 3/16-inch (5 mm) metal rod. Taper
these pins as indicated in Figure 8.

9. Insert the tapered end of the pins into the threaded holes in the eld holder ring as

indicated in Figure 8.

10. Set the new eld on the motor housing with the guide pins passing through the two
mounting holes in the body of the eld as shown in Figure 8. Be sure that the four

wires are in the position shown in Figure 8.

11. Set a length of 3/8-inch (9.5 mm) steel bar stock approximately 5 inches (127 mm)

long, or a similar object, on the eld as illustrated in Figure 8. Drive the eld into the
motor housing by rmly and squarely tapping the bar with a hammer. Use caution to
avoid cutting or otherwise damaging the wires that are connected to the eld.

12. Connect the two wires having rings to the motor brush holders, one wire to each
brush holder.

13. Reinstall the eld-retaining ring.

Figure 8 Model 2 Field Replacement

"

"

"

"

"

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

23

Service and Maintenance

Figure 9 Model 2 Parts Index

24

Models 2-120 and 2-240

Federal Signal www.fedsig.com

Table 6 Model 2 Siren Parts List

Service and Maintenance

Index

Description Part No. Qty.

No.

1 Housing Assembly, Galvanized Steel 8155B086 1 AR

2 Projector 8247C006 1

3 Plug 8283A120 1

4 Bafe Plate 8247C007 1

5 #5 x 1 inch Taper Pin 8400A229 2

6 End Bell, Stator L01-02 1

7 Locknut L01-15 1

8 Lock Washer L01-16 1

9 Bearing 8239A045 2

10 Mounting Clip 8155109A 3

11 Rotor Spacer and Bearing Stop L01-08 1

12 Rotor L01-21 1

13 Key 8247A057 1

14 Armature (120 V) 847B041G 1 AR

Armature (240 V) 8247B039G

15 Field Locking Ring L01-20 1

16 Field (120 V) 8247B042G 1 AR

Field (240 V) 8247B040G

17 Spring Lock Washer, Lower Bearing L01-11 1

18 Brush Holder 8247A021 2

19 Brush and Spring 8247A020 2

20 Brush Holder Cap 8247A022 2

21 Motor Housing L01-03 1

22 Legs L01-4A 3

23 Cable Hanger 8400A211 1

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

25

Service and Maintenance

Figure 10 Model RC2W Parts Index

1

2

3

4

5

291208A

Table 7 Models RC2W-120 and RC2W-240 Siren Remote Control Parts List

Item

Description Part No. Qty.

No.

1 NEMA Type R3 Cabinet 170272B 1

2 Contacts and Springs (Power Pole) 8717C182-11 2 sets

3 Contacts and Springs (Interlock) 8217C180-12 1 set

4 60 Hz Coil, 120/240 V 8217C180-16 1

5 Overload Heaters (K-58) 120 V 8217C182-20 1

Overload Heaters (K-42) 240 V 8217C183-20 1

26

Models 2-120 and 2-240

Federal Signal www.fedsig.com

Replacement Parts

To order replacement parts, call Customer Care. See Getting Service.

Table 8 Replacement Parts

Description Part Number

Bearing (Two Required) Q8239A045

Brush and Spring (Two Required) Q8247A020

Brush Holder (Two Required) Q8247A021

Getting Service

If you are experiencing any difculties, contact Federal Signal Customer Care at:
800-548-7229 or 708-534-3400 extension 7511 or Technical Support at: 800-524-3021
or 708-534-3400 extension 7329 or through e-mail at: [e-mail]. For
instruction manuals and information on related products, visit: http://www.fedsig.com/

Replacement Parts

Description, Specications, Installation, Operation, and Service Manual
Federal Signal www.fedsig.com

27

2645 Federal Signal Drive
University Park, Illinois 60484

www.fedsig.com

Customer Support 800-548-7229 • [phone]
Technical Support 800-524-3021 • [phone]