wheelock NS4-241575W-FR, NS4-241575W-FW INSTALLATION INSTRUCTIONS

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INSTALLATION INSTRUCTIONS

SERIES NS4 FOUR WIRE APPLIANCES

(WALL MOUNT VERSIONS)

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

GENERAL:

Wheelock’s Series NS4 Horn Strobe Appliances are designed to provide independent operation for the horn appliance, when the
strobe circuit is powered. They are the ideal choice for retrofit applications as well as new installations. The NS4 Appliances are UL
Listed under Standard 1971 for Signaling Devices for the Hearing Impaired and UL Standard 464 for Audible Signal Appliances. 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

and equipped with a NS Mounting Plate (NSMP) that can be mounted to single­gang, double-gang, 4” backbox, 100mm European backbox or SHBB surface backbox (See Mounting Options). These appliances are
Listed for wall mounting only

. The NS4 Appliances use a Xenon flashtube with solid state circuitry enclosed in a rugged Lexan

lens to provide maximum visibility and reliability for effective visible signaling.

The horn portion of the NS4 Appliances can be field set to provide either Continuous Horn or Code 3 Horn. The sound output can be
field set for High (HI) or Low (LO) dBA.

The NS4 Horn Strobe can also be used with a Sync Module (SM) or Dual Sync Module (DSM) to provide synchronized strobe and
synchronized Code 3 signal.

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

NOTE: All CAUTIONS and WARNINGS are identified by the symbol

. All warnings are printed in bold capital letters

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:

Table 1: UL Ratings

Models Nominal Rated Strobe

Voltage Voltage Range Candela

(VDC/VRMS) (VDC/VRMS) (cd)
NS4-2415W 24 20.0-31.0 15
NS4-241575W* 24 20.0-31.0 15
NS4-2430W 24 20.0-31.0 30
NS4-2475W 24 20.0-31.0 75
NS4-24110W 24 20.0-31.0 110
NS4-1215W 12 10.5-15.6 15
NS4-121575W* 12 10.5-15.6 15

* 1575W models are UL Listed for 15cd and meet 75cd on axis.

Copyright 1997, 1998 Wheelock, Inc. All rights reserved.

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Table 2: dBA Sound Output for 24VDC

Description Volume Reverberant Per UL 464 Anechoic dBA

20VDC 24VDC 31VDC 20VDC 24VDC 31VDC
Low 79 82 82 88 90 92

Continuous Horn High 85 88 88 93 95 97

Low 75 75 75 88 90 92

Code 3 Horn High 79 82 82 93 95 97

Table 2A: dBA Sound Output for 12VDC

Description Volume Reverberant Per UL 464 Anechoic dBA

10.5VDC 12VDC 15.6VDC 10.5VDC 12VDC 15.6VDC
Low 73* 76 76 82 84 86

Continuous Horn High 82 82 85 87 89 91

Low 67* 70* 70* 82 84 86

Code 3 Horn High 76 76 79 87 89 91

WARNING: NS4 AUDIBLE APPLIANCES SET ON LOW dBA DO NOT MEET THE 75dBA MINIMUM UL
REVERBERANT SOUND LEVEL REQUIRED FOR PUBLIC MODE FIRE PROTECTION SERVICE (NOTED BY * IN
TABLE 1). THIS SETTING IS ACCEPTABLE ONLY FOR GENERAL SIGNALING (NON-FIRE ALARM) USE. USE
THE “HIGH” dBA SETTING WITH THIS TONE FOR PUBLIC MODE SERVICE.

NOTES:

1. Strobes will produce 1 flash per second over the listed 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. 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 +32oF to +120oF (0oC to +49oC) and maximum humidity of

85% RH.

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 applied voltage to the signaling appliance.

WARNING: ALTHOUGH UL TESTING HAS VERIFIED THAT THESE PRODUCTS FUNCTION EVEN AT 80% OF
THEIR MINIMUM RATING AND 110% OF THEIR MAXIMUM RATING, WHEELOCK STRONGLY RECOMMENDS
THAT THE VOLTAGE APPLIED TO THESE PRODUCTS BE WITHIN THEIR RATED VOLTAGE RANGE. THE
APPLICATION OF IMPROPER VOLTAGE MAY RESULT IN DEGRADED OPERATION OR DAMAGE TO THESE
PRODUCTS, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO YOU
AND/OR OTHERS.

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Table 3: Strobe Current Ratings (AMPS)

Rated Average Current

Voltage NS4-2415W NS4-241575W NS4-2430W NS4-2475W NS4-24110W

20.0VDC 0.067 0.084 0.100 0.165 0.209

24.0VDC 0.057 0.072 0.085 0.140 0.169

31.0VDC 0.049 0.059 0.069 0.114 0.138

20.0VRMS 0.087 0.109 0.131 0.217 0.274

24.0VRMS 0.080 0.101 0.121 0.200 0.241

31.0VRMS 0.073 0.088 0.105 0.176 0.217
Voltage NS4-1215W NS4-121575W ------ ------ ------

10.5VDC 0.156 0.199 ------ ------ ------

12.0VDC 0.133 0.170 ------ ------ ------

15.6VDC 0.107 0.137 ------ ------ ------

10.5VRMS 0.202 0.258 ------ ------ ------

12.0 VRMS 0.187 0.238 ------ ------ ------

15.6 VRMS 0.162 0.206 ------ ------ -----­Rated Peak Current *

Voltage NS4-2415W NS4-241575W NS4-2430W NS4-2475W NS4-24110W

20.0VDC 0.169 0.205 0.240 0.400 0.495

24.0VDC 0.173 0.210 0.250 0.400 0.510

31.0VDC 0.178 0.215 0.255 0.425 0.525

20.0VRMS 0.173 0.210 0.250 0.410 0.510

24.0VRMS 0.178 0.215 0.255 0.410 0.525

31.0VRMS 0.182 0.220 0.265 0.435 0.535
Voltage NS4-1215W NS4-121575W ------ ------ ------

10.5VDC 0.405 0.510 ------ ------ ------

12.0VDC 0.410 0.520 ------ ------ ------

15.6VDC 0.415 0.530 ------ ------ ------

10.5VRMS 0.410 0.520 ------ ------ ------

12.0 VRMS 0.415 0.530 ------ ------ ------

15.6 VRMS 0.420 0.540 ------ ------ -----­Rated Inrush Current **

Voltage NS4-2415W NS4-241575W NS4-2430W NS4-2475W NS4-24110W

20.0VDC 0.135 0.135 0.135 0.135 0.135

24.0VDC 0.165 0.165 0.165 0.165 0.165

31.0VDC 0.210 0.210 0.210 0.210 0.210

20.0VRMS 0.175 0.175 0.175 0.175 0.175

24.0VRMS 0.210 0.210 0.210 0.210 0.210

31.0VRMS 0.275 0.275 0.275 0.275 0.275
Voltage NS4-1215W NS4-121575W ------ ------ ------

10.5VDC 0.225 0.225 ------ ------ ------

12.0VDC 0.255 0.255 ------ ------ ------

15.6VDC 0.340 0.340 ------ ------ ------

10.5VRMS 0.320 0.320 ------ ------ ------

12.0 VRMS 0.370 0.370 ------ ------ ------

15.6 VRMS 0.485 0.485 ------ ------ ------

* The time duration for the peak current is 100 microseconds.

** The time duration for the inrush current is 4 milliseconds.

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Table 3A: Horn Current Ratings (AMPS) for Wall Models

High dBA

Voltage NS4-2415W NS4-241575W NS4-2430W NS4-2475W NS4-24110W

20.0VDC 0.024 0.024 0.024 0.024 0.024

24.0VDC 0.028 0.028 0.028 0.028 0.028

31.0VDC 0.036 0.036 0.036 0.036 0.036

20.0VRMS 0.034 0.034 0.034 0.034 0.034

24.0VRMS 0.044 0.044 0.044 0.044 0.044

31.0VRMS 0.057 0.057 0.057 0.057 0.057
Voltage NS4-1215W NS4-121575W ------ ------ ------

10.5VDC 0.014 0.014 ------ ------ ------

12.0VDC 0.015 0.015 ------ ------ ------

15.6VDC 0.021 0.021 ------ ------ ------

10.5VRMS 0.021 0.021 ------ ------ ------

12.0 VRMS 0.025 0.025 ------ ------ ------

15.6 VRMS 0.030 0.030 ------ ------ -----­Low dBA

Voltage NS4-2415W NS4-241575W NS4-2430W NS4-2475W NS4-24110W

20.0VDC 0.017 0.017 0.017 0.017 0.017

24.0VDC 0.022 0.022 0.022 0.022 0.022

31.0VDC 0.027 0.027 0.027 0.027 0.027

20.0VRMS 0.022 0.022 0.022 0.022 0.022

24.0VRMS 0.033 0.033 0.033 0.033 0.033

31.0VRMS 0.043 0.043 0.043 0.043 0.043
Voltage NS4-1215W NS4-121575W ------ ------ ------

10.5VDC 0.008 0.008 ------ ------ ------

12.0VDC 0.009 0.009 ------ ------ ------

15.6VDC 0.011 0.011 ------ ------ ------

10.5VRMS 0.010 0.010 ------ ------ ------

12.0 VRMS 0.011 0.011 ------ ------ ------

15.6 VRMS 0.015 0.015 ------ ------ ------

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

When calculating the total average, peak and inrush currents: Use Table 3 and 3A to determine the highest value of “Rated Average
Current” for an individual strobe (across the expected operating voltage range of the strobe), and use Table 3 to determine the highest
value of “Rated Inrush Current” or “Rated Peak Current” (whichever is higher) of an individual strobe (across the expected voltage
range of the 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 include any required safety factors.

If the inrush current or peak current exceeds the power supplies’ inrush capacity, the output voltage provided by the power supplies
may drop below the listed voltage range of the appliances connected to the supply and the voltage may not recover in some types of
power supplies. For example, an auxiliary power supply that lacks filtering at its output stage (either via lack of capacitance and/or
lack of battery backup across the output) may exhibit this characteristic.

CAUTION: Series NS4 are not designed to be used on coded systems in which the applied voltage is cycled on and off.

P83601 F

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