Whelen WPA112 User Manual download pdf (Page 2)

Page 2

INTRODUCTION...

This manual outlines the procedures necessary for the

installation of the WPA

Series Waterproof Amplifier. This

includes the 100 Watt models (WPA112, WPA124) and 58 Watt

models (WPA512 and WPA524).

Mounting the WPA Series Waterproof

Siren Amplifier:

Caution: If the amplifier is mounted vertically, it must

be oriented so that the connector end of the amplifier

is facing downward!

1. Locate a suitable mounting location for the WPA. Do not

mount this product in any location where it may be exposed

to extreme temperatures.

2. Be sure that the remote amplifier fits properly and does not

interfere with any vehicle components.

3. Position the remote amplifier on the proposed mounting

location. Using an awl or other suitable tool, scribe the

mounting surface where the mounting holes are to be

drilled.

Caution: As mounting the WPA will require drilling, it

is absolutely necessary to make sure that no other

vehicle components could be damaged by the

drilling process. If damage is likely, select a different

mounting location.

4. Carefully drill the mounting holes in the areas scribed in

step 3. The diameter of these holes will be determined by

the size of the mounting hardware and the thickness of the

mounting surface.

5. Using the supplied #10 x 3/4” sheet metal screws and #10

external tooth lock washers, secure the remote amplifier to

the mounting location.

Wiring the WPA Series Waterproof

Amplifier:

Connecting To Power:

1. Following the factory wiring harness, extend the RED and

BLACK wires to the battery.

WARNING! All customer supplied wires that connect to the

positive terminal of the battery must be sized to supply at

least 125% of the maximum operating current and FUSED

at the battery to carry that load. DO NOT USE CIRCUIT

BREAKERS WITH THIS PRODUCT!

2. Connect the RED wire to one end of a user supplied fuse

block. Do not

connect this unit to the battery yet!

3. Connect the BLACK wire directly to the vehicle’s chassis

ground (typically adjacent to the battery).

Connecting To Your Speaker:

1. Route the ORANGE and BROWN wires towards your

speaker.

2. Connect the ORANGE wire to the POSITIVE (+) terminal

on the speaker.

3. Connect the BROWN wire to the NEGATIVE (-) terminal on

the speaker.

Note: The two (2) BLUE wires are used to connect

your two-way radio’s external speaker to the

WPA for radio rebroadcast. This is an

optional connection and does not effect the

other operations of the WPA.

Wiring The WPA Siren Amplifier Radio

Rebroadcast Wires (BLUE):

1. Locate the two wires that connect the external speaker to

the vehicle’s two-way radio.

2. Cut one of these wires and splice one of the BLUE wires

into this circuit.

3. Cut the remaining speaker wire and splice the remaining

BLUE wire into this circuit.

Note: Radio rebroadcast will NOT work with

amplified remote speakers! If your remote

speaker is amplified (i.e.: contains a power

amp circuit in the speaker assembly), do not

enable the radio rebroadcast feature.

Connecting To Your Horn Relay (Optional):

Note: This option can only be enabled when using

customer supplied switches.

1. Locate your vehicle’s horn relay. Now locate the wire that

connects the vehicle horn to the horn relay output and cut

this wire.

2. Extend each end of the cut wire (using a minimum 16

gauge wire) to a user supplied SPDT (single pole/double

throw) horn transfer switch.

3. Connect the wire coming from the horn relay output to the

switch “wiper” as shown in Figure 1.

4. Connect the wire coming from the horn to one side of the

switch as shown in Figure 1.

5. Connect the WHITE/GREEN wire to the other side of the

switch as shown in Figure 1.

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