wheelock NS-121575, NS-24MCC, NS-24MCW, NS-24MCCH, NS-241575 Service Manual

THE CITY OF
NEW YORK

DEPARTMENT OF BUILDINGS

U

L

®

Series NS Horn Strobes and Series NH Horns

Series NS

Description:

The Series NS Horn Strobe Appliances are designed for indoor,
wall and ceiling mount applications.

The Series NH Horn and the horn portion of the Series NS include
a selectable continuous horn tone or temporal pattern (Code 3) with
selectable dBA settings of 90 or 95 dBA.

Strobe options include 1575cd or the Wheelock patented
Multi-Candela strobe with field selectable candela settings of
15/30/75/110cd for wall mount and 15/30/75/95cd and 115/177cd
for ceiling mount.

These versatile Horn Strobe Appliances can be synchronized using
the Wheelock SM, DSM Sync Modules or the PS-24-8MC Power
Supply with the Wheelock patented Sync Protocol. Additionally, the
audible may be silenced while maintaining strobe activation.

All models of the Series NS and NH are designed for maximum
performance, reliability and cost-effectiveness while meeting or
exceeding the latest requirements of NFPA 72/ANSI 117.1/UFC and
UL Standards 1971 and 464 as well as meeting ADA requirements
concerning photosensitive epilepsy.

The Wheelock patented 2-Wire Series NS Horn Strobes and
Series NH Horns offer more features with lower current draw than
competitors.

Series NH

Features:

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

• ADA/NFPA/UFC/ANSI compliant

• Complies with OSHA 29, Part 1910.165

• Wall mount model Field Selectable Candela Setting
15/30/75/110cd (24 VDC Multi-Candela models) or 1575cd in
12 or 24 VDC

• Ceiling mount model Field Selectable Candela Setting
15/30/75/95cd and 115/177cd (24 VDC Multi-Candela
models)

• Selectable Continuous Horn or Temporal (Code 3)

• 2 Selectable dBA settings of 90 and 95 dBA in both tones

• Patented Universal Mounting Plate

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

• Wall and Ceiling Mount

• Ceiling models with same look as Wheelock round ceiling
strobes and speakers

• NH horn is selectable 12 or 24 VDC in 1 appliance

• The strobes can be synchronized using the Wheelock sync
modules or power supplies with built in Sync Protocol

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

E5946
S5391

151-92-E

7125-0785:142

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: Ratings Per UL Standard 1971

Regulated

Voltage

Range

VDC/FWR

Strobe Candela

(CD)

Model

Input

Voltage

VDC

NS-24MCW 24 16.0 - 33.0 15/30/75/110

NS-241575W 24 16.0 - 33.0 15 (75 on Axis)

NS-121575W 12 8.0 - 17.5 15 (75 on Axis)

NS-24MCC 24 16.0 - 33.0 15/30/75/95

Table 2: dBA Ratings for Series NS/NH Horn

Reverberant dBA

Description Volume

Continuous

Horn

Code 3

Horn

High 83 87 89 95

Low 76 81 84 90

High 79 82 89 95

Low 72 76 84 90

@ 10ft per UL 464

12

VDC

24

VDC 12VDC24VDC

NS-24MCCH 24 16.0 - 33.0 115/177

Table 3: UL Max Current*

Audible Wall Mount Strobe Models Ceiling Mount Strobe Models

Series NS/NH

24 VDC

NH-12/24 NS-241575W NS-24MCW NS-24MCC NS-24MCCH

@24VDC 15/75cd 15cd 30cd 75cd 110cd 15cd 30cd 75cd 95cd 115cd 177cd

High (95) dBA 24VDC 0.044 0.104 0.074 0.107 0.184 0.244 0.082 0.124 0.209 0.275 0.350 0.477

Low (90) dBA 24VDC 0.018 0.096 0.066 0.101 0.177 0.232 0.071 0.114 0.201 0.261 0.306 0.429

Anechoic dBA

@ 10 ft

Audible Wall Mount

Series NS/NH

12VDC

NH-12/24 Aud/Strobe

@12V NS-121575W

High (89) dBA 12 VDC 0.021 0.220

Low (84) dBA 12VDC 0.012 0.210

* 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.