wheelock NS-121575, NS-241575 INSTALLATION INSTRUCTIONS

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Long Branch, NJ 07740 Thank you for using our products.
[phone] (USA)
[phone] (CANADA)
www.wheelockinc.com

GENERAL:

Wheelock’s Series NS Horn Strobe Appliances require only 2-wires for operation of the horn and strobe appliance and provide a selectable continuous or Code 3 Horn
tone and continuous strobe when connected directly to a fire alarm control panel (FACP). They can also provide a synchronized Code 3 Horn tone and synchronized
strobe when used in conjunction with a Sync Module (SM), Dual Sync Module (DSM) or Wheelock power supplies. They are the ideal choice for applications where
the audible silence feature is required. The NS Appliances are UL Listed under Standard 1971 for Signaling Devices for the Hearing Impaired and UL Standard 464 for
Audible Signal Appliances. The 24V NS is also ULC Listed under Standard CAN/ULC-S526-02 for Visual Signaling Appliances and Standard CAN/ULC-S525-99 for
Audible Signaling Appliances for Fire Alarm Systems. The 1575W candela wall mounted strobes are listed at 15 candela under UL Standard 1971 and meet 75 candela
intensity on axis with low current draw. They are listed for indoor use only
double-gang, 4” backbox, 100mm European backbox or SHBB surface backbox (See wiring and mounting information). These strobe models are Listed for wall
mounting only. The NS appliances uses a xenon flashtube with solid state circuitry enclosed in a polycarbonate lens to provide maximum visibility and reliability for
effective visible signaling.

Series NS Appliances can be field set for high (HI) or low (LO) dBA sound output.

These strobe models are designed for use with either filtered DC (VDC) or unfiltered full-wave-rectified (FWR) input voltage. All inputs are polarized for compatibility
with standard reverse polarity supervision of circuit wiring by a FACP.

NOTE: The Code 3 temporal pattern (1/2 second on, 1/2 second off, 1/2 second on, 1/2 second off, 1/2 second on, 1-1/2 off and repeat) is specified by ANSI and
NFPA 72 for standard emergency evacuation signaling. The Code 3 Horn should be used only for fire evacuation signaling and not for any other purpose.

NOTE: All Canadian Installations should be in accordance with the Canadian Standard for the Installation of Fire Alarm Systems - CAN/ULC-S524-01 and Canadian
Electrical Code, Part 1. Final acceptance is subject to authorities having jurisdiction (AHJ).

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, 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

NS-241575W* 24 16.0-33.0 20.0-31.0 15 75
NS-121575W* 12 8.0-17.5 ------ 15 --

Description Volume Reverberant Per UL 464 Anechoic Per CAN/ULC-S525-99

Continuous Horn High 83 87 90 90 92 94

Code 3 Horn High 79 82 86 90 92 94

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

2. Anechoic dBA is measured on axis in a non-reflective (free field) test room using fast meter response. For peak dBA (measured with peak meter response), add

5dBA to anechoic values as shown in Table 2 &2A. Reverberant dBA is a minimum UL rating based on sound pressure measurements in a reverberant test room.

3. All models are UL Listed for indoor use with a temperature range of +32°F to +120°F (0°C to +49°C) and maximum humidity of 93% ± 2% 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 not subjected to misuse or

abuse.

Copyright 2005 Wheelock, Inc. All rights reserved. P84234H

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

Regulated

Voltage

(VDC/VRMS)

* 1575W models are UL Listed for 15cd and meet 75cd on axis. NS-121575 is not ULC approved.

16.0VDC 24.0VDC 33.0VDC 20.0VDC 24.0VDC 31.0VDC
Low 77 81 83 87 89 91

Low 72 76 79 87 89 91

ULC Directional Characteristics: Rated output 92dBA (Unit set on high volume and 24VDC)

-3dBA: 60 degrees left, 40 degrees right -6dBA: 70 degrees left, 70 degrees right

Description Volume Reverberant Per UL 464

Continuous Horn High 78 83 86

Code 3 Horn High 75 79 82

INSTALLATION INSTRUCTIONS

SERIES NS TWO WIRE APPLIANCES

(WALL MOUNT VERSIONS)

and equipped with a NS nounting plate (NSMP) that can be mounted to single-gang,

Table 1: UL and ULC Ratings

Voltage Range Limit Per

UL 464 and UL 1971

(VDC/VRMS)

Table 2: dBA Sound Output for 24VDC Per UL and ULC

Table 2A: dBA Sound Output for 12VDC Per UL

8.0VDC 12.0VDC 17.5VDC
Low 72 76 80

Low 67 72 74

Voltage Range Per CAN/ULC-S526-02

And CAN/ULC-S525-99

(VDC/VRMS)

Strobe Candela

(cd)

UL ULC

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Table 3: Current Ratings (AMPS) for 24VDC and 12VDC Wall Models

Maximum RMS Current with Hi dBA Setting

Voltage NS-241575W Voltage NS-121575W
DC 16.0VDC-33.0VDC 0.104 8.0VDC-17.5VDC 0.220
FWR 16.0VRMS-33.0VRMS 0.174 8.0VRMS-17.5VRMS 0.325

Maximum RMS Current with Low dBA Setting

Voltage NS-241575W Voltage NS-121575W
DC 16.0VDC-33.0VDC 0.096 8.0VDC-17.5VDC 0.210
FWR 16.0VRMS-33.0VRMS 0.160 8.0VRMS-17.5VRMS 0.320

When calculating the total current: Use Table 3 to determine the highest value of “RMS Current” for an individual NS then multiply the value by the total number of
NS Appliances. Be sure to add the currents for any other 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.

WARNING: MAKE SURE THAT THE TOTAL RMS CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE
SYSTEM’S PRIMARY AND SECONDARY POWER SOURCES, APPLIANCE CIRCUITS, SM, DSM SYNC MODULES AND 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.

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

SOUND OUTPUT (SPL) SETTINGS:

WARNING: THE NS APPLIANCES MUST BE FIELD SET TO THE DESIRED TONE AND dBA SOUND OUTPUT LEVEL BEFORE THEY ARE
INSTALLED. THIS IS DONE BY PROPERLY INSERTING JUMPER PLUGS IN ACCORDANCE WITH THESE INSTRUCTIONS. INCORRECT
SETTINGS WILL RESULT IN IMPROPER PERFORMANCE, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.

Figure 1: Showing Location of Jumper Plug

NOTE: The NS-24MCW must be set for Code 3 horn when installed on a synchronized notification appliance circuit (NAC).

Figure 2: Jumper plug settings for

High dB and Code 3.

CENTER PIN
IS NOT USED

SHOWN

SHOWN

SET ON

HI dB

SET ON
CODE 3

(Use needle nose pliers to pull and

properly set the jumper plugs.)

Factory setting is on High dB and Code 3.

Figure 3: Jumper plug settings for Low

dB and Continuous Horn.

CENTER PIN
IS NOT USED

SHOWN

SET ON

LOW dB

No jumper plugs are needed for

Continuous Horn and low dB settings.

PLUG

NO PLUGHILOW

SHOWN
SET ON
CONT' HORN *

TOP

CODE 3

JUMPER

HORN

PLUGS

Figure 4: Jumper plug settings for

High dB and Continuous Horn.

CENTER PIN
IS NOT USED

SHOWN

SET ON

HI dB

SHOWN
SET ON
CONT' HORN *

Figure 5: Jumper plug settings for Low

dB and Code 3.

CENTER PIN
IS NOT USED

SHOWN
SET ON

SHOWN
SET ON

LOW dB

CODE 3

P84234H

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