Bosch CH70-24MCWH-FR, CH70-24MCWH-FW Installation Manual

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273 Branchport Avenue
Long Branch, N.J. 07740 INSTALLATION INSTRUCTIONS
[phone] SERIES CH70-24MCWH MULTI-HIGH CANDELA CHIME STROBE
www.wheelockinc.com

GENERAL:

Wheelock’s Series CH70-24MCWH Multi-High-Candela Electronic Chime Strobe is UL Listed under Standard 1971 for Signaling Devices for the Hearing Impaired
and UL Standard for Private Mode Audible Signal Appliances. The CH70-24MCWH Chime Strobe is designed for low current draw and versatile performance. This
model offers a choice of single stroke or vibrating operation, has adjustable sound level, and has a chime tone adjustable from 800 to 1200Hz. The CH70-24MCWH
Multi-High-Candela strobe provides two selectable light output intensities in one unit. This appliance also incorporates a Chime Mounting Plate attached to the chime
for ease of installation. The Chime Strobe model can provide a non-synchronized strobe appliance when connected directly to a fire alarm control panel (FACP), or
provide a synchronized strobe appliance when used in conjunction with a Sync Module (SM), Dual Sync Module (DSM) or Wheelock power supplies. The strobe uses
a xenon flashtube with solid state circuitry enclosed in a polycarbonate lens to provide maximum visibility and reliability for effective visible signaling. The CH70­24MCWH is Listed for indoor use, wall mount only

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, CANDELA SETTING, 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.

SPECIFICATIONS:

Models Regulated Voltage Maximum RMS dBA at 10 Feet Strobe

Voltage Range Current (Chime Only) Reverberant Candela
(VDC/VRMS) (VDC/VRMS) (ADC) Min Max

CH70-24MCWH 24 16.0-33.0 0.022 52 58 135/185

NOTES:

1. The strobe will produce 1 flash per second over the "Regulated Voltage" range.

2. The strobes meet the required light distribution patterns defined in UL 1971.

3. The CH70-24MCWH model is UL Listed for indoor use with a temperature range of +32°F to +120°F (0°C to +49°C) and maximum humidity of 85% RH. The

effect of shipping and storage temperatures shall not adversely affect the performance of the appliance when it is stored in the original cartons and is not subjected
to misuse or abuse.

4. The Chime must be set at maximum volume for Private Mode Fire Protective Service per UL 464 listing requirements (see page 3).

5. The chime produces a brief inrush current of 0.100 Amps with filtered DC input (0.140 Amps with full-wave-rectified (VRMS) input) with a time duration of 100

milliseconds.

WARNING: CANDELA SETTING WILL DETERMINE THE CURRENT DRAW OF THE PRODUCT.

When calculating the total currents use Table 2 to determine the highest value of RMS current for an individual strobe, then multiply these values by the total number of
strobes. Be sure to add the currents for any other appliances, including audible signaling appliances powered by the same source, and to include any required safety
factors.

NOTE: The maximum number of strobes on a single notification appliance circuit shall not exceed 50.

CAUTION: These notification appliances are UL Listed as “Regulated”. They are intended to be used with FACPs whose notification circuits are UL Listed as

“Regulated.” These appliances shall not be used on UL Listed “Special Application” notification circuits unless the appliances are identified to be compatible in the
installation instructions of the FACP or unless the FACP is identified to be compatible in this instruction manual.

WARNING: THESE APPLIANCES WERE TESTED TO THE REGULATED VOLTAGE LIMITS OF 16.0-33.0 VOLTS FOR 24V MODELS USING FILTERED
DC OR UNFILTERED FULL-WAVE-RECTIFIED VOLTAGE. DO NOT APPLY VOLTAGE OUTSIDE OF THIS RANGE.

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 APPPLIED VOLTAGE TO THE STROBES. THE MAXIMUM WIRE IMPEDANCE
BETWEEN STROBES SHALL NOT EXCEED 35 OHMS.

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

Copyright 2005 Wheelock, Inc. All rights reserved. P84467D

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

with the backboxes specified in these instructions (see wiring and mounting information).

Table 1: UL Listed Models and Ratings

Table 2: UL Current Ratings (Strobe Only)

Maximum RMS Current (Amps)

UL Voltage 135cd 185cd
DC 16-33VDC 0.300 0.420
FWR 16-33VRMS 0.455 0.645

Sheet 1 of 4

WARNING: MAKE SURE THAT THE TOTAL RMS CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE SYSTEM’S

r

PRIMARY AND SECONDARY POWER SOURCES, NOTIFICATION APPLICIANCE CIRCUITS, SM, DSM SYNC MODULES, OR WHEELOCK POWER
SUPPLIES DOES 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.

WIRING AND MOUNTING INFORMATION:

CAUTION: The following figures (A,B) 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.

CAUTION: Check that the installed product will have sufficient clearance and wiring room prior to installing backboxes and conduit, especially if sheathed

multiconductor cable or 3/4" conduit fittings are used.

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.

A

4" SQ. X 1-1/2"
EXTENSION RING *

#8-32
SCREWS

FLUSH MOUNTING

(STROBE SPEAKER)

4" SQ. X 2-1/8"
BACKBOX

B

SURFACE
BACKBOX
(SBB)

#8-32
SCREWS

SURFACE MOUNTING

(STROBE SPEAKER)

SPEAKER
MOUNTING
PLATE

SQUARE OR
ROUND GRILLE

MAXIMUM NUMBER OF CONDUCTORS

AWG #18 AWG #16

8 8

#6-19
SCREWS

AWG #14

8 8

AWG #12

Figure 1:

Chime Appliance and Strobe Appliance operate independently. Recommended fo
coded systems where the chime is set on single stroke (SS) mode and is cycled on
and off while the strobe flashes continuously.

FROM PRECEDING
CHIME OR FIRE
ALARM CONTROL
PANEL (FACP)

FROM PRECEDING
STROBE, FACP
SYNC MODULE OR
POWER BOOSTER *

STROBE

CHIME

TO NEXT
CHIME OR
END OF LINE RESISTOR
(EOLR)

TO NEXT
STROBE OR EOLR

SQUARE OR
ROUND GRILLE

NOTE: BACKBOX IS COMPATIBLE WITH WIREMOL D AND CONDUIT,

MOUNTING HOLES ARE FOR SINGLE-GANG, DOUBLE-GANG,
4" SQ. 3-1/ 2" & 4" OCTAGON OR ROUND BACKBOXES.

MAXIMUM NUMBER OF CONDUCTORS

AWG #18 AWG #16

8 8

#6-19
SCREWS

AWG #14

8 8

Figure 2:

Chime Appliance and Strobe Appliance operate in unison. Red and black wires are
supplied. The chime must be set for vibrating mode (VIB). (Use of Sync Module is
not recommended in this wiring option)

FROM
PRECEDING
APPLIANCE OR
FIRE ALARM
CONTROL PANEL
(FACP)

RED

STROBE

BLACK

CHIME

SPEAKER
MOUNTING
PLATE

AWG #12

TO NEXT
APPLIANCE OR
END OF LINE
RESISTOR
(EOLR)

* Refer to instruction sheets for SM (P83123), DSM (P83177) or Wheelock power supplies for additional information.

Figure 3:

• The Chime Strobe model has in-out wiring terminals that accept two #12 to #18 American Wire
Gauge (AWG) wires at each screw terminal. Strip leads 3/8 inches and connect to screw terminals.

• Break all in-out wire runs on supervised circuits to assure integrity of circuit supervision as shown in
Figure 3. The polarity shown in the wiring diagrams is for operation of the appliances. The polarity
is reversed by the FACP during supervision.

GROUNDING: Install the appliance to a grounded backbox (Per NFPA 70, the National Electrical Code) using the lockwashers provided in hardware bag under the
head of each mounting screw for the appliance.

Figure 4: PC Board Layout

P84467 D

Sheet 2 of 4