Bosch AH-24WP-R Specsheet
Fire Alarm Systems | AH‑24 24 V Electronic Horns
AH‑24 24 V Electronic Horns
www.boschsecurity.com
u Cost‑effective two‑wire design
u Selectable continuous tone or temporal (Code 3)
sound pattern synchronization
u Three field‑selectable sound levels
These Wheelock horns offer tone choices of either
continuous horn or temporal pattern (Code 3) tone
when constant voltage from the fire alarm control
panel (FACP) is applied. Each tone has three
field‑selectable volume levels.
These horns can be synchronized when used with the
SM (single) and DSM (dual) Synchronization Modules
or a compatible control panel. If not synchronized, the
temporal sound patterns might overlap and not be
distinctive.
Certifications and approvals
Cooper Wheelock, Inc. holds these Listings and
Approvals:
Region
Certification
USA UL ULSZ: Audible Signal Appliance (UL464)
CSFM see our website
Canada ULC All models: ULSZC: Audible Signal Appli-
ances and Accessories, Fire Alarm
u Weatherproof model available
u Low average current draw
Installation/configuration notes
Compatible Products
The following products are compatible with the AH‑24
Horns:
Category Product ID Product Description
Control
D7022
1
Conventional FACP
Panels
D7024
2
Addressable FACP
D7024 Conventional FACP
D8024
D9124
D10024A
FPD-7024
1
1
1
2
Analog FACP
Addressable FACP
Analog FACP
Addressable FACP
FPD-7024 Conventional FACP
FPA-1000 Analog Addressable FACPs
Modules SM‑12/24‑R Synchronization module (red)
DSM‑12/24‑R Dual synchronization module
(red)
2 | AH‑24 24 V Electronic Horns
RSSP‑241575W‑FR Fixed‑candela retrofit strobe
RSSP‑24MCW‑FR Multi‑candela retrofit strobe
RSSP‑24MCWH‑FR High‑candela retrofit strobe
1
For synchronization, use the SM or DSM
plate
plate
plate
Synchronization Modules. The synchronization module
must be set for 24 VDC operation. When used, the
D7022 must be set for 24 VDC operation.
2
When used with a D7039 Multiplex Expansion
Module, the FPD-7024 and D7024 become
addressable fire alarm control panels (FACPs).
Mounting Considerations
Use as Combination Appliance
Where combination appliances are required, the
AH‑24‑R Horn can be used with the RSSP‑241575W‑FR
Fixed‑candela, RSSP‑24MCW‑FR Multi‑candela, or
RSSP‑24MCWH‑FR High‑candela Retrofit Strobe Plates
that are designed to meet or exceed the latest
requirements of NFPA 72, ANSI 117.0 and UL 1971.
The horns and retrofit strobe plates are also
compatible with the SBL2‑R Retrofit Device Back Box.
Outdoor or Severe Environment Applications
For an outdoor application or a severe environment
(NEMA 3R) application, the AH‑24WP Weatherproof
Horn in combination with a WBB‑R Weatherproof Back
Box must be mounted on a flat wall such that the wall
covers the entire rear surface of the back box. The
back box must have its drain holes pointed toward the
ground. The knockouts in the rear surface of the back
box must remain intact.
The knockout hole on top of the back box is sized for a
half‑inch conduit and matching connector. A proper
watertight conduit fitting must be used.
Indoor Applications
The AH‑24‑R and AH‑24‑W Horns are equipped with a
mounting plate that mounts on the indicated back
boxes for the indicated applications:
Conduit
Applications
Single‑gang •
Double‑gang • •
Four‑inch square • •
100‑mm European • •
SHBB-R • •
Surface
Mounted
Flush
Mounted
The AH‑24WP Weatherproof Horn can be indoor
surface‑mounted on a deep (>2.125 in. [5.4 cm]), fourinch square back box.
Wiring
Notice
Do not use these horns in coded systems in which
the voltage is cycled on and off.
The input terminals accept wires with diameters
between 18 AWG and 12 AWG (ISO 0.75 mm2 and
4 mm2).
Parts included
Quant. Component
1 Horn
1 Mounting Plate
1 Hardware pack
1 Literature pack
Technical specifications
Environmental Considerations
Relative Humidity: Up to 95%, non‑condensing
Temperature (operating): +32°F to +120°F (0°C to +49°C)
Horn Ratings at 24 VDC
Continuous Horn
Reverberant dBA at 10 ft (3 m) per
UL464:
Temporal (Code 3) Horn
Reverberant dBA at 10 ft (3 m) per
UL464:
Notice
The sound output for the Temporal (Code 3)
mode is rated lower than in Continuous mode
because the time that the horn is off is averaged
into the sound output rating. When the horn
produces a tone in Temporal mode, its sound
pressure is the same as the Continuous mode.
High: 91 dBA
Medium: 88 dBA
Low: 83 dBA
High: 87 dBA
Medium: 84 dBA
Low: 79 dBA
Mechanical Properties
Dimensions (H x W x D): 4.125 in. x 4.125 in. x 1.25 in.
Material: Molded plastic enclosure
(10.5 cm x 10.5 cm x 3.2 cm)
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