wheelock CH70-24MCW, CH70, CH70-241575, CH70-MCWH, CH90-24MCC Service Manual

SERIES CH70

THE CITY OF
NEW YORK

DEPARTMENT OF BUILDINGS

U

L

®

CHIME STROBE

SERIES CH90

CHIME STROBE

Description

The Wheelock Series CH Chimes and Chime Strobes
minimize alarm system power supply requirements and
wiring costs with a low current draw and a patented chime
mounting plate for fast, easy installation. Each model has
a built-in level adjustment feature and an aesthetic two (2)
screw grille cover.

These unique solid-state chime appliances provide field
selectable single-stroke or vibrating operation with Anechoic
sound levels adjustable up to 83 dB and tone adjustable from
800 to 1200 Hz.

Strobe options for wall mount models include 1575cd or
Wheelock patented MCW multi-candela strobe with field
selectable candela settings of 15/30/75/110cd or the high
intensity MCWH strobe with field selectable 135/185cd.

Ceiling mount models are available in Wheelock patented
MCC multi-candela ceiling strobe with field selectable
intensities of 15/30/75/95cd or the high intensity MCCH strobe
with field selectable 115/177cd.

The strobe portion of all Series CH Chime Strobes may be
synchronized when used in conjunction with the Wheelock
SM, DSM Sync Modules or the Wheelock PS-24-8MC
Power Supply with patented Sync Protocol. Wheelock’s
synchronized strobes offer an easy way to comply with ADA
recommendations concerning photosensitive epilepsy as well
as meeting the requirements of NFPA 72 and UFC.

The Series CH Chime Strobes are UL Listed for indoor,
wall or ceiling mount applications under Standard 1971
for Signaling Devices for the Hearing-Impaired and under
Standard 464 for Private Mode Audible Signal Appliances.
They are available in two attractive package styles for flush
mounting to standard electrical boxes or convenient surface
mounting. All models include IN/OUT wiring terminations that
accept two #12 to #18 AWG wires at each terminal. Inputs
are polarized for compatibility with industry standard reverse

polarity supervision.

Series CH Chimes and Chime Strobes

SERIES CH90

CHIME

Features

• Approvals include: UL Standard 1971, UL Standard 464,
New York City (MEA), and California State Fire Marshal
(CSFM) and Chicago (BFP) See approvals by model in
Specifications and Ordering Information

• ADA/NFPA/UFC/ANSI compliant

• Complies with OSHA 29 Part 1910.165

• Wall mount models are available with Field

Selectable Candela Settings of 15/30/75/110cd or

135/185cd (Multi-Candela models) or 1575cd (single
candela model)

• Ceiling mount models are available with field selectable
candela settings of 15/30/75/95cd or

115/177cd (Multi-candela models)

• Low current draw with temperature compensation to
reduce power consumption and wiring costs

• Strobes produce 1 flash per second over the regulated
voltage range

• 24 VDC with wide UL “Regulated Voltage” using filtered
DC or unfiltered VRMS input voltage

• Synchronize with Wheelock SM, DSM or the Wheelock
PS-24-8MC Power Supply with built-in sync protocol

• Adjustable Volume and Tone Control

• Single Stroke or Vibrating Operation

• Fast Installation with IN/OUT screw terminals using #12 to
#18 AWG wires

SERIES CH70

CHIME

S5391

151-92-E

7125-0785:151
7135-0785:109 (Chime Only)

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

WARNING: PLEASE READ THESE SPECIFICATIONS AND ASSOCIATED INSTALLATION INSTRUCTIONS CAREFULLY BEFORE USING, SPECIFYING OR

APPLYING THIS PRODUCT. VISIT WWW.COOPERWHEELOCK.COM OR CONTACT COOPER WHEELOCK FOR THE CURRENT INSTALLATION INSTRUCTIONS.
FAILURE TO COMPLY WITH ANY OF THESE INSTRUCTIONS, CAUTIONS OR 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.

General Notes:

• Strobes are designed to flash at 1 flash per second minimum over their “Regulated Voltage Range”. Note that NFPA-72 specifies a flash rate of 1

to 2 flashes per second and ADA Guidelines specify a flash rate of 1 to 3 flashes per second.

• All candela ratings represent minimum effective Strobe intensity based on UL Standard 1971.

• Series NS Strobe products are listed under UL Standard 1971 for indoor use with a temperature range of 32°F to 120°F (0°C to 49°C) and
maximum humidity of 93% (± 2%).

• Series NH horns are listed under UL Standard 464 for audible signal appliances (Indoor use only).

• “Regulated Voltage Range” is the newest terminology used by UL to identify the voltage range. Prior to this change UL used the

terminology “Listed Voltage Range”.

Table 1: Average RMS Current

CH70/

CH90

Chimes

Chime

current

241575W 24MCW 24MCWH 24MCC 24MCCH

1575cd 15cd 30cd 75cd 110cd 135cd 185cd 15cd 30cd 75cd 95cd 115cd 177cd

24 vdc 0.022 0.060 0.041 0.063 0.109 0.140 0.195 0.270 0.045 0.070 0.119 0.159 0.195 0.270

UL max* 0.022 0.090 0.060 0.092 0.165 0.220 0.300 0.420 0.065 0.105 0.189 0.249 0.300 0.420

CH70 Strobe current - Wall Mount CH90 Strobe current - Ceiling Mount

Table 2: Chime dBA ratings

dBA @ 10 ft
reverberant

Min Max

CH70/CH90
sound level

Peak dBA @

10 ft. anechoic

83 52 58

Application

1. The chimes are factory set in single stroke (SS) mode. They can be changed to vibrating (VIB) mode with jumper on PC Board. SINGLE STROKE OPERATION:
The minimum input pulse duration must be at least 160 ms “on” time and 160 ms “off” time. The chime will only operate once each time it is pulsed. This mode is
recommended for coded systems. VIBRATING OPERATION: Continuous input voltage applied to the chime will activate the chime at one-second intervals.

2. The volume and tone controls have been adjusted at the factory to insure maximum dBA output. However, once the mode is selected, the installer may want to
fine-tune the signal to better suit the application.

3. Anechoic dBA is measured in an anechoic chamber with peak meter response. Reverberant dBA is rated per UL Standard 464.

4. Chime inrush current is 0.100 amps maximum with filtered DC input (0.140 amps with VRMS input voltage) with a time duration of 100 milliseconds.

* RMS current ratings are per UL average RMS
method. UL max current rating is the maximum RMS
current within the listed voltage range (16-33v for 24v
units). For strobes the UL max current is usually at
the minimum listed voltage (16v for 24v units). For
audibles the max current is usually at the maximum
listed voltage (33v for 24v units). For unfiltered FWR
ratings, see installation instructions.