Bosch CH70-24-R, CH70-24-W Specsheet
Fire Alarm Systems | CH70 Square Chimes
CH70 Square Chimes
www.boschsecurity.com
u Low current draw with temperature compensation
to reduce power consumption and wiring costs
u 24 VDC, filtered or FWR
u Adjustable volume and tone
These Wheelock CH70 Square Chimes provide a low
current draw, a choice of single‑stroke or vibrating
operation, an adjustable sound level, and a chime tone
adjustable from 800 Hz to 1200 Hz. They also have an
attached mounting plate for easy indoor installation on
a variety of electrical boxes.
Functions
Sound Mode Settings
The chimes are factory set in single‑stroke mode. They
can be changed to vibrating mode before wiring by
moving a jumper.
Single‑Stroke Mode
The minimum input pulse duration must be at least
160 ms on and 160 ms off. The chime only operates
once each time it is pulsed. Use this mode for coded
systems.
Vibrating Mode
Continuous input voltage must be applied to the chime
to activate the chime at 1 sec intervals.
Volume and Tone Settings
The volume and tone controls are factory set to ensure
maximum dBA output. The volume and tone can be
tuned to suit a particular application, but appropriate
u Single‑stroke or vibrating tone
measurements must be taken to ensure the volume
meets the listing requirements for private mode fire
protective service per UL464.
Certifications and approvals
Cooper Wheelock, Inc. holds these Listings and
Approvals:
Region Certification
USA UL UCST: Audible Signal Appliances, Gener-
al Siganal (UL464), ULSZ: Audible Signal Appliances (UL464)
CSFM see our website
Installation/configuration notes
Compatible Products
The following products are compatible with the CH70
Chimes:
Category Product ID Product Description
Control
D7022
1
Conventional FACP
Panels
D7024
2
Addressable FACP
2 | CH70 Square Chimes
D7024 Conventional FACP
D8024
D9124
D10024A
FPA-1000 Analog Addressable FACPs
FPD-7024
FPD-7024 Conventional FACP
Modules SM‑12/24‑R Synchronization module (red)
DSM‑12/24‑R Dual synchronization module
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 modules
1
1
1
2
Analog FACP
Addressable FACP
Analog FACP
Addressable FACP
(red)
plate
plate
plate
with these control panels. The synchronization module
must be set for 24 V 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
Mount these chimes on the indicated back boxes for
the indicated applications:
Conduit
Applications
Four‑inch square* •
SBB Back Box • •
Surface
Mounted
Flush Mounted
* Requires a four‑inch square back box that is 2.125 in
(5.4 cm) deep with a 1.5 in. (3.8 cm) deep extension
ring.
Use as Combination Appliance
Where combination appliances are required, the CH70
Chimes can be used with the RSSP‑241575W‑FR
(15/75 cd), RSSP‑24MCW‑FR (15 cd, 30 cd, 75 cd, or
110 cd), or RSSP‑24MCWH‑FR (135 cd or 185 cd)
Retrofit Strobe Plates that are designed to meet or
exceed the latest requirements of NFPA 72,
ANSI 117.0 and UL 1971. The chimes and retrofit
strobe plates are also compatible with the SBL2‑R
Retrofit Device Back Box.
Wiring
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 Chime
1 Hardware pack
1 Literature pack
Technical specifications
Electrical
Chime Current (maximum): 22 mA
Voltage (input) 24 VDC nominal, filtered or FWR
Environmental
Relative Humidity: Up to 85%, non‑condensing
Temperature (Operating): +32°F to +120°F (0°C to +49°C)
Mechanical
Dimensions (H x W x D): 5.1 in. x 5.1 in. x 0.4375 in.
Material: Molded plastic enclosure
(13 cm x 13 cm x 1.1 cm)
Chime Ratings at 24 VDC
Reverberant dBA at 10 ft (3 m) per
UL464:
Maximum: 58 dBA
Minimum: 52 dBA
Ordering information
CH70‑24‑R Wall‑mount Chime (red)
Square red chime with adjustable volume and
single‑stroke or vibrating tone
Order number CH70-24-R
CH70‑24‑W Wall‑mount Chime (white)
Square white chime with adjustable volume and
single‑stroke or vibrating tone
Order number CH70-24-W
Accessories
ISP2‑R Surface Adapter (red)
13.3 cm (5.25 in.) square, 3 cm (1.1875 in.) deep
Order number ISP2-R
ISP2‑W Surface Adapter (white)
13.3 cm (5.25 in.) square, 3 cm (1.1875 in.) deep
Order number ISP2-W
RP‑R Retrofit Plate (red)
20.3 cm (8 in.) high, 14.9 cm (5.875 in.) wide
Order number RP-R
SBB‑R Surface‑mount Back Box (red)
14 cm (5.5 in.) x 14.2 cm (5.6 in.) x 9.1 cm (3.6 in.)
Order number SBB-R
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