wheelock AH-12, AH-24 INSTALLATION INSTRUCTIONS

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INSTALLATION INSTRUCTIONS

SERIES AH AUDIBLE HORN APPLIANCES

Use this product according to this instruction manual. Please keep this instruction manual for future reference.

GENERAL:

Wheelock’s AH Audible Horn Appliances are designed to provide a continuous horn tone or code 3 horn tone when connected
directly to the Fire Alarm Control Panel (FACP), or provide a synchronized code 3 horn when used in conjunction with a Sync
Module (SM), Dual Sync Module (DSM) or Power Supply (PS-12/24-8). The AH Appliances are UL Listed under UL Standard
464 for Audible Signal Appliances and ULC Listed under Standard CAN/ULC-S525-99 for Audible Signaling Appliances. They
are listed for indoor use only and are equipped with a Universal Mounting Plate (UMP) that can be mounted to single-gang,
double-gang, 4” square backbox, 100mm European or SHBB surface backbox (See Mounting Options).

AH Appliances can be field set to provide either High (HI) dBA, Medium (MED) dBA or Low (LO) dBA sound output. All AH
models are designed for use with either filtered DC or unfiltered Full-Wave-Rectified (FWR) input voltage. All inputs are
polarized for compatibility with standard reverse polarity supervision of circuit wiring by a FACP.

NOTE: The code 3 horn incorporates the temporal pattern (1/2 second on, 1/2 second off, 1/2 second on, 1/2 second off, 1/2
second on, 1-1/2 off and repeat) specified by ANSI/NFPA for standard emergency evacuation signaling. The code 3 horn shall be

used only for fire evacuation signaling and not for any other purpose.

NOTE: All CAUTIONS and WARNINGS are identified by the symbol . All warnings are printed in bold capital letters.

WARNING: PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE USING THIS PRODUCT.
FAILURE TO COMPLY WITH ANY OF THE FOLLOWING INSTRUCTIONS, CAUTIONS AND WARNINGS
COULD RESULT IN IMPROPER APPLICATION, INSTALLATION AND/OR OPERATION OF THESE PRODUCTS
IN AN EMERGENCY SITUATION, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.

WARNING: THE AUDIBLE HORN APPLIANCES MUST BE FIELD SET TO THE DESIRED TONE AND dBA
SOUND OUTPUT LEVEL BEFORE THEY ARE INSTALLED. THIS IS DONE BY PROPERLY INSERTING A
JUMPER PLUG IN ACCORDANCE WITH THESE INSTRUCTIONS. INCORRECT SETTINGS WILL RESULT IN
IMPROPER PERFORMANCE, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.

WARNING: THE AH AUDIBLE HORN APPLIANCE IS A “FIRE ALARM DEVICE – DO NOT PAINT.”

SPECIFICATIONS:

Table 1: UL/ULC Listed Models and Ratings

Regulated

Model

AH-24 24 16-33 20-31 0.021 0.043 0.080 0.041 0.051 0.090
AH-12 12 8-17.5 10.5-15.6 0.058 0.108 0.192 0.059 0.109 0.209

Voltage

(VDC/VRMS)

UL Voltage

Range

(VDC/VRMS)

ULC Voltage

Range

(VDC/VRMS)

Lo Med Hi Lo Med Hi

Maximum RMS Current (AMPS)

DC FWR

Copyright 2005 Wheelock, Inc. All rights reserved.

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Table 1A: ULC Current Ratings

Average Current (AMPS) Model ULC Voltage

AH-24

AH-12

(VDC/VRMS)

20.0 .014 .020 .035

24.0 .017 .025 .050

31.0 .021 .030 .065

10.5 .030 .037 .093

12.0 .035 .045 .119

15.6 .045 .075 .149

Lo Med Hi

Table 2: dBA Sound Output for 24VDC Models

Reverberant dBA Per UL 464 Anechoic Per CAN/ULC-S525-99 Description Volume

16.0VDC 24VDC 33.0VDC 16.0VDC 24VDC 33.0VDC

Low 80 83 86

Continuous Horn Medium 85 88 91

High 88 91 93
Low 75 79 82

Code 3 Horn Medium 80 84 86

High 84 87 90

88 90 92

90 95 97

92 97 99

88 90 92

90 95 97

92 97 99

Table 2A: dBA Sound Output for 12VDC Models

Description Volume

Reverberant dBA @10 Feet

Per UL 464

Anechoic dBA @10 Feet

Per CAN/ULC-S525-99

8.0VDC 12VDC 17.5VDC 8.0VDC 12VDC 17.5VDC

Low 80 83 86

Continuous Horn Medium 85 88 91

High 88 91 93
Low 75 79 82

Code 3 Horn Medium 80 84 86

High 84 87 89

88 90 92

90 95 97

92 97 99

88 90 92

90 95 97

92 97 99

NOTES:

1. All models are UL/ULC Listed for indoor use with a temperature range of +0°C to +49°C (+32°F to +120°F) and
maximum humidity of 93% ± 2% RH.

Table 2B: ULC Directional Characteristics

-3 dBA: 48 degrees left, 41 degrees right

-6 dBA: 50 degrees left, 58 degrees right

WARNING: CHECK THE MINIMUM AND MAXIMUM OUTPUT OF THE POWER SUPPLY AND STANDBY
BATTERY AND SUBTRACT THE VOLTAGE DROP FROM THE CIRCUIT WIRING RESISTANCE TO
DETERMINE THE APPLIED VOLTAGE TO THE SIGNALING APPLIANCE.

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WARNING: FOR UL APPLICATIONS THESE APPLIANCES WERE TESTED TO THE OPERATING VOLTAGE
LIMITS OF 16-33 VOLTS FOR 24V MODELS AND 8-17.5 VOLTS FOR 12V MODELS USING FILTERED (DC) OR
UNFILTERED FULL-WAVE-RECTIFIED (FWR). DO NOT APPLY 80% AND 110% OF THESE VOLTAGE VALUES
FOR SYSTEM OPERATION.

WARNING: FOR ULC APPLICATIONS THESE APPLIANCES WERE TESTED TO THE OPERATING
VOLTAGE LIMITS OF 20-31 VOLTS FOR 24V MODELS AND 10.5-15.6 VOLTS FOR 12V MODELS USING
FILTERED (DC) OR UNFILTERED FULL-WAVE-RECTIFIED (FWR). APPLY 80% AND 110% OF THESE
VOLTAGE VALUES FOR SYSTEM OPERATION.

WARNING: MAKE SURE THAT THE TOTAL RMS CURRENT, TOTAL AVERAGE CURRENT AND TOTAL
PEAK CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE SYSTEM’S PRIMARY
AND SECONDARY POWER SOURCES, NAC CIRCUITS, SM, DSM SYNC MODULES OR WHEELOCKS POWER
SUPPLIES DO NOT EXCEED THE POWER SOURCES’ RATED CAPACITY OR THE CURRENT RATINGS OF ANY
FUSES ON THE CIRCUITS TO WHICH THESE APPLIANCES ARE WIRED. OVERLOADING POWER SOURCES
OR EXCEEDING FUSE RATINGS COULD RESULT IN LOSS OF POWER AND FAILURE TO ALERT OCCUPANTS
DURING AN EMERGENCY, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.

When calculating the total currents: Use Table 1 to determine the highest value of “RMS Current” for an individual AH Appliance
(across the expected operating voltage range of the AH Appliance) or use Table 1A to determine the highest value of “Rated
Average Current” of an individual AH Appliance (across the expected voltage range of the AH Appliance), then multiply these
values by the total number of AH Appliances; be sure to add the currents for any other appliances, powered by the same source and
include any required safety factors.

If the peak current exceeds the power supplies’ peak capacity, the output voltage provided by the power supplies may drop below
the listed voltage range of the appliances connected to the supply and the voltage may not recover in some types of power supplies.
For example, an auxiliary power supply that lacks filtering at its output stage (either via lack of capacitance and/or lack of battery
backup across the output) may exhibit this characteristic.

CAUTION: Audible Horn appliances are not designed to be used on coded systems in which the applied voltage is cycled on
and off.

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