Wheelock AH-12 User manual

P83519 K
Sheet 1 of 7
273 Branchport Avenue
Long Branch, NJ 07740
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www.wheelockinc.com 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
Maximum RMS Current (AMPS)
DC FWR
Model
Regulated
Voltage
(VDC/VRMS)
UL Voltage
Range
(VDC/VRMS)
ULC Voltage
Range
(VDC/VRMS) Lo Med Hi Lo Med Hi
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
Copyright 2005 Wheelock, Inc. All rights reserved.

P83519 K
Sheet 2 of 7
Table 1A: ULC Current Ratings
Average Current (AMPS)Model ULC Voltage
(VDC/VRMS) Lo Med Hi
20.0 .014 .020 .035
24.0 .017 .025 .050
AH-24
31.0 .021 .030 .065
10.5 .030 .037 .093
12.0 .035 .045 .119
AH-12
15.6 .045 .075 .149
Table 2: dBA Sound Output for 24VDC Models
Reverberant dBA Per UL 464 Anechoic Per CAN/ULC-S525-99Description Volume
16.0VDC 24VDC 33.0VDC 16.0VDC 24VDC 33.0VDC
Low 80 83 86 88 90 92
Continuous Horn Medium 85 88 91 90 95 97
High 88 91 93 92 97 99
Low 75 79 82 88 90 92
Code 3 Horn Medium 80 84 86 90 95 97
High 84 87 90 92 97 99
Table 2A: dBA Sound Output for 12VDC Models
Reverberant dBA @10 Feet
Per UL 464
Anechoic dBA @10 Feet
Per CAN/ULC-S525-99
Description Volume
8.0VDC 12VDC 17.5VDC 8.0VDC 12VDC 17.5VDC
Low 80 83 86 88 90 92
Continuous Horn Medium 85 88 91 90 95 97
High 88 91 93 92 97 99
Low 75 79 82 88 90 92
Code 3 Horn Medium 80 84 86 90 95 97
High 84 87 89 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.

P83519 K
Sheet 3 of 7
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.

P83519 K
Sheet 4 of 7
SOUND OUTPUT (SPL) SETTINGS:
Figure 1: Showing Location of Jumper Plug
CODE 3
HI
MED
LO
Factory setting is on medium dB and code 3.
Figure 2: Jumper plug settings for high, medium, low and code 3. Figure 3: Jumper plug setting for Continuous Horn.
SHOWN SET ON HIGH dB
SHOWN SET ON LOW dB
SHOWN SET ON MED dB
CODE 3
CONTIUOUS HORN
TURN PLUG 90°
*
(Use needle nose pliers to pull and properly set the jumper plugs)
No jumper plug is needed for continuous horn setting.
However, it is recommended that the jumper plug be
retained in the unit for future use (if needed) as shown
in Figure 3.
Note: The AH must be set for code 3 when used with the sync module.
* Continuous horn operation without sync module.
WIRING INFORMATION:
Figure 4:
+
-
(+) (-)
-
+
TO NEXT APPLIANCE OR
RESISTOR (EOLR)
FROM PRECEDING APPLIANCE,
FIRE ALARM CONTROL PANEL (FACP)
OR SYNC MODULE
END OF LINE
When the sync module is used, the audible tone will be the code 3
sound only. Refer to Sync Module installation instruction sheets
SM (P83123), DSM (P83177) and Wheelock’s Power Supplies for
additional information.
Figure 5:
1. AH Appliances have in-out wiring
terminals that accepts two #12 to 18
American Wire Gauge (AWG) wires
at each screw terminal. Strip leads
3/8” inches for connection to screw
terminals.
2. Break all in-out wire runs on
supervised circuit to assure
supervision as shown in Figure 5. The
polarity shown in the wiring diagrams
are for the operation of the appliances.
The polarity is reversed by the FACP
during supervision.

P83519 K
Sheet 5 of 7
MOUNTING OPTIONS:
CAUTION: The following figures show the maximum number of field wires (conductors) that can enter the backbox used
with each mounting option. If these limits are exceeded, there may be insufficient space in the backbox to accommodate the field
wires and stresses from the wires could damage the product.
Although the limits shown for each mounting option comply with the National Electrical Code (NEC), Wheelock recommends use
of the largest backbox option shown and the use of approved stranded field wires, whenever possible, to provide additional wiring
room for easy installation and minimum stress on the product from wiring.
4 444
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
BACKBOX 2.0" DEEP
A
FLUSH MOUNTING
STD. SINGLE-GANG
UNIVERSAL
MOUNTING PLATE
#6-32 SCREWS
#6-20 SCREWS
B
4 444
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
DEEP BACKBOX OR
FLUSH OR SURFACE MOUNT
4" SQ. X 1-1/2"
UNIVERSAL
MOUNTING PLATE
#8-32 SCREWS
#6-20 SCREWS
100mm SQ. X 37.5mm
EUROPEAN BACKBOX
C
4 444
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
BACKBOX 2-1/4" DEEP
FLUSH MOUNTING
STD. DOUBLE-GANG
UNIVERSAL
MOUNTING PLATE
#6-32 SCREWS
#6-20 SCREWS
4 444
AWG #18 AWG #16 AWG #14 AWG #12
MAXIMUM NUMBER OF CONDUCTORS
#6-20 SCREWS
SURFACE BACKBOX
SURFACE MOUNT
SHBB
UNIVERSAL
MOUNTING PLATE
#8-32 SCREWS
D