Wolo 150 User Manual

INSTALLATION INSTRUCTIONS

™

Model 150-24 SEA ALERT Xtreme
24-Volt

Your purchase of a Wolo SEA ALERT™ Air Horn will complement your boat, while offering an extra level of
protection. Wolo’s products are manufactured with the finest materials. Before being packaged, each horn
is tested to ensure it meets all of our manufacturing specifications. If you need help installing your new Wolo
horn, our technicians are available to answer your questions, Monday thru Friday, 9 AM to 4 PM EST at
1-888-550-HORN (4676).

Before installation of the horn is attempted, it is important to read these instructions completely. The lives of
people can be dependent on a proper installation of the horn. The person doing the installation must have
knowledge of the proper method for mounting and securing the horn to the exterior of the boat, as well as
knowledge of the boat’s electrical system. Again, read the instructions completely and note any messages
marked “IMPORTANT” or “WARNING’’. A safe installation will prevent injury or damage to the boat.

WARNING: Installation of the SEA ALERT requires drilling. The installer must carefully inspect both sides of
the selected mounting locations to ensure that there are no wires, fuel lines and or any other components that
could be damaged by drilling.

WARNING: If any wires are routed through drilled holes, always de-burr ensuring that there are no sharp
edges. Install a rubber grommet into all metal holes that wires are being routed through.

MOUNTING TRUMPET: Fig. 1 & 2

IMPORTANT: The horns should be mounted facing

forward whenever possible. The NMMA Certification
Program requires this for boats 39’ or longer.

1. Locate the desired mounting location of the trumpets.
For best results, the front of the horn should be
unobstructed so that the sound can carry straight ahead.

IMPORTANT: FOR BEST PERFORMANCE AND
SOUND, ALWAYS MOUNT THE COMPRESSOR
CLOSE TO TRUMPET, KEEPING THE HOSE LENGTH
AS SHORT AS POSSIBLE. THE COMPRESSOR MUST
BE MOUNTED IN A DRY INTERIOR LOCATION).

2. Use the horn’s gasket as a template, mark hole
locations and drill to size.

3. Thread the chrome air inlet tube into the base of
the horn.

4. Mount and secure the horn as shown in Fig. 1.
IMPORTANT: Be sure to use the provided rubber
gasket to protect against water leaks. Tighten the
base plate front screw and rear nut that threads onto
the air inlet tube evenly to ensure a watertight seal.

air inlet

tube

5. Position the front trumpet support bracket around
the narrow part of the trumpet. IMPORTANT:
Provided in the kit is a soft rubber strip that is placed
into the ring of the support bracket to provide a tight fit
and prevent vibration. Push the bracket forward until
it is tight. Use the bracket as a template, mark hole
locations and drill to size. See Fig 2.

6. Secure the front trumpet support bracket using the hardware provided. Tighten screws evenly to ensure a
watertight seal. IMPORTANT: Be sure to use the rubber gasket provided to protect against water leaks.

7. Follow the same procedure steps 1-6 to mount the second trumpet.

COMPRESSOR INSTALLATION: Fig. 3 & 4

8. Install the compressor in a dry interior location. IMPORTANT: The compressor
should not be mounted further than 30 inches from the trumpet to ensure best sound.

9. To secure the compressor, drill one 3/16” hole. When possible, mount the
compressor vertically (air outlet on top). Install the head
of the bolt into the mounting bracket’s slot on the side
of the compressor. Secure the compressor using the
lock washer/nut provided as shown in Fig. 3.

10. Using the plastic tubing provided, cut to size and
connect the compressor to the horn’s air inlet tube as
shown in Fig. 4.

11. Follow the same procedure steps 7-10 to install
the other compressor that will connect to the second
trumpet.

WARNING: Avoid making any kinks or sharp bends
in plastic tubing that can reduce air flow and alter the
horn’s sound. For best performance and sound, always
keep the plastic tubing as short as possible.

air

inlet

tube

WIRING:
ELECTRICAL CONNECTIONS FOR USING A NEW HORN BUTTON SWITCH: Fig. 5

12. Install the horn relay provided, locate close to the compressor in a dry interior location with the terminals
facing downward.

13. Connect relay terminal 87
to the compressor’s positive (+)
terminal. Use 16-gauge wire or
heavier.

14. Connect relay terminal 85 to
the horn button switch terminal.
(Horn switch not provided).

15. The horn switch’s other
terminal is connected to negative
(-) such as the (-) battery post
or any clean metal negative
surface. Use 18 gauge wire or heavier.

16. Connect relay terminal 30 & 86 to positive (+) 24-volts such as battery, alternator, fuse block or etc., using
16-gauge wire or heavier. IMPORTANT: Protect the electrical circuit with the fifteen (15)-amp inline fuse
provided. WARNING: The inline fuse provided must be connected directly to the power source, (battery or
alternator).

17. Connect the compressor’s negative (-) terminal to boat’s negative (-) battery post or any clean metal
negative surface. Use not less than 16-gauge wire.

Fig. 5

RECAP OF RELAY TERMINAL CONNECTIONS
Relay terminals 30 & 86: the two terminals are connected to 24-volts (+) positive, using the 15-amp inline fuse.
Relay terminal 85: is connected to horn switch.
The horn switch’s other terminal: is connected to negative (-) battery post.
Relay terminal 87: is connected to the compressor’s (+) motor terminal.
The compressor’s negative (-) terminal is connected the boat’s negative (-) battery post.

18. Follow the same procedure steps 12-17 to wire the relay that will power the compressor for the second trumpet.