wheelock NS-24MCC, NS-24MCCH INSTALLATION INSTRUCTIONS
273 Branchport Avenue
Long Branch, NJ 07740 Thank you for using our products.
(800) 631-2148 (US)
www.cooperwheelock.com SERIES NS-24MCC/MCCH MULTI-CANDELA HORN/STROBE
GENERAL:
Cooper Wheelock’s Series NS Multi-Candela ceiling mount Horn/Strobe (NS) requires only 2-wires for operation of the horn and strobe circuits and provides either
four or two selectable candela settings (15, 30, 75, 95 or 115, 117). The NS is the ideal choice for applications where the audible silence feature is required. The NS is
UL Listed under Standard 1971 for Signaling Devices for the Hearing Impaired and UL Standard 464 for Audible Signal Appliances for
with a mounting plate for use with a 4” backbox or 100mm European backbox (See Figure A and mounting procedures). This strobe model is Listed for
mounting only. The NS uses a xenon flashtube with solid state circuitry enclosed in a polycarbonate lens to provide maximum visibility and reliability for effective
visible signaling.
The horn portion of the NS can be field set to provide either Continuous Horn or Code 3 Horn and can be field set for High (HI) or Low (LO) dBA.
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 NS Horn/Strobe can be used with a Sync Module (SM), Dual Sync Module (DSM) or Wheelock power supplies to provide synchronized strobe and synchronized
Code 3 signal.
The NS Horn/Strobe is 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 fire alarm control panel (FACP).
WARNING: PLEASE READ THESE INSTRUCTIONS CAREFULLY. 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:
NOTES:
1. The strobe will produce 1 flash per second over the "Regulated Voltage" range.
2. This horn/strobe model meets the required light distribution patterns defined in UL 1971.
3. All models are UL Listed for indoor ceiling 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.
WARNING: CANDELA SETTING WILL DETERMINE THE CURRENT DRAW OF THE PRODUCT.
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.
Copyright 2006 Cooper Wheelock, Inc. All rights reserved.
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
Model Regulated
NS-24MCC 24 16.0-33.0 15/30/75/95
NS-24MCCH 24 16.0-33.0 115/177
Description Volume Reverberant dBA Per UL 464
Continuous Horn High 84 88 90
Code 3 Horn High 80 83 85
Regulated Voltage 15cd 30cd 75cd 95cd 115cd 177cd
DC 16.0-33.0VDC 0.082 0.124 0.209 0.275 0.350 0.477
FWR 16.0-33.0VRMS 0.141 0.204 0.312 0.411 0.491 0.681
Regulated Voltage 15cd 30cd 75cd 95cd 115cd 177cd
DC 16.0-33.0VDC 0.071 0.114 0.201 0.261 0.306 0.429
FWR 16.0-33.0VRMS 0.124 0.184 0.301 0.397 0.469 0.659
INSTALLATION INSTRUCTIONS
(CEILING MOUNT VERSION)
The Code 3 Horn should be used only for fire evacuation signaling and not for any other purpose.
Table 1: UL Listed Models and Ratings
Voltage
(VDC/VRMS)
Table 2: dBA Sound Output for 24VDC Per UL
16.0VDC 24.0VDC 33.0VDC
Low 78 81 84
Low 73 77 79
Table 3: UL Current Ratings (AMPS)
Maximum RMS Current with Hi dBA Setting
Maximum RMS Current with Low dBA Setting
Voltage Range Limit
Per UL 464 and UL 1971
(VDC/VRMS)
indoor use only. It is molded
Strobe
Candela
(cd)
ceiling
P84794 F
Sheet 1 of 4
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: The NS Series horn/strobes are not designed to be used on coded systems in which the applied voltage is cycled on and off.
CANDELA AND SOUND OUTPUT SETTINGS:
WARNING: THE CANDELA SELECT SWITCH MUST BE FIELD SET TO THE REQUIRED CANDELA INTENSITY BEFORE INSTALLATION.
WHEN CHANGING THE SETTING OF THE CANDELA SELECT SWITCH, MAKE CERTAIN THAT IT “CLICKS” IN PLACE. AFTER CHANGING
THE CANDELA SETTING, THE APPLIANCE MUST BE RETESTED TO VERIFY PROPER OPERATION. IMPROPER SETTING OF THE
CANDELA SELECT SWITCH MAY RESULT IN OPERATION AT THE WRONG CANDELA, WHICH COULD RESULT IN A CURRENT DRAW
EXCEEDING THE POWER SUPPLY’S CAPACITY.
Figure 1: Showing Location of Jumper Plug and Candela Selector.
MCCH CANDELA POINTER
MCC CANDELA POINTER
95
75
30
15
177
115
NOTE: The NS 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 U S ED
SHOWN
SHOWN
SET ON
HI dB
SET ON
CODE 3
(Use needle nose pliers to pull and
properly set the jumper plugs.)
NOTE: Factory setting is on High dB, Code 3 and 15cd for MCC; 177cd for MCCH.
Figure 3: Jumper plug settings for Low
dB and Continuous Horn.
CENTER PIN
IS NOT USED
SHOWN
SET ON
SHOWN
SET ON
LOW dB
No jumper plugs are needed for
CONT' HORN *
Continuous Horn and low dB settings.
Figure 4: Jumper plug settings for
High dB and Continuous Horn.
CENTER PIN
IS NOT USED
SHOWN
SET ON
HI dB
However, it is recommended that the
jumper plug be retained in the unit for
future use (if needed) as shown.
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
P84794 F
Sheet 2 of 4
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