wheelock AS-24MCW INSTALLATION INSTRUCTIONS

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GENERAL:

Wheelock’s Series Multi-Candela Audible Strobe Appliance (AS-24MCW) is the industry’s first 2-wire horn strobe alarm appliance that provides 4 selectable candela
settings (15, 30, 75, 110). Additionally, this appliance can function with a continuous or code 3 horn tone and non-synchronized strobe when connected directly to a
Fire Alarm Control Panel (FACP), or provide a synchronized code 3 horn tone and synchronized strobe when used in conjuncton with a Sync Module (SM), Dual Sync
Module (DSM) or Wheelock power supplies. The AS-24MCW Appliance is UL Listed under Standard 1971 for Emergency Appliances for the Hearing Impaired and
UL Standard 464 for Audible Signal Appliances. The AS-24MCW is also ULC Listed under Standard CAN/ULC-S526-02 for Visual Signaling Appliances and
Standard CAN/ULC-S525-99 for Audible Signaling Appliances. This appliance is listed for wall mounting and indoor use only
mounting plate (UMP) that can be mounted to single-gang, double-gang, 4” backbox, 100mm European backbox or SHBB surface backbox (See wiring and mounting
information). The AS-24MCW Appliance uses a xenon flashtube with solid state circuitry enclosed in a polycarbonate lens to provide maximum visibility and
reliability for effective visible signaling.

The AS-24MCW Appliance can be field set to provide either high (HI) dBA, medium (MED) dBA or low (LO) dBA sound output.
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.

This model 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 an FACP.

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 authority having jurisdiction (AHJ).

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:

Regulated Strobe Mounting

Model Voltage Candela Options

(VDC/VRMS)

AS-24MCW 24 16.0-33.0 20.0-31.0 15/30/75/110 A,B,C,D

Description Volume Reverberant Per UL 464 Anechoic dBA Per CAN/ULC-S525-99 at 10 Feet

Continuous Horn Medium 85 88 91 93 95 97

Code 3 Horn Medium 80 84 86 93 95 97

NOTES:

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

2. This strobe/horn model meets the required light distribution patterns defined in UL 1971 and ULC-S526-02.

3. This model is UL/ULC 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.

CAUTION: The AS-24MCW appliance is not designed to be used on coded systems in which the applied voltage is cycled on and off.

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.

When calculating the total current: Use Table 3 to determine the highest value of “RMS Current” for an individual AS Appliance then multiply the value by the total
number of AS Appliances. Be sure to add the currents for any other appliances powered by the same source and include any required safety factors.

NOTE: The maximum number of strobes on a single notification appliance circuit shall not exceed 50.

US) INSTALLATION INSTRUCTIONS
CANADA) SERIES AS-24MCW MULTI-CANDELA AUDIBLE STROBE APPLIANCE

(WALL MOUNT VERSION)

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

Table 1: UL/ULC Ratings

Voltage Range Limit

Per UL 1971/464

(VDC/VRMS)

Table 2: dBA Sound Output

16.0VDC 24.0VDC 33.0VDC 20.0VDC 24.0VDC 31.0VDC
Low 80 83 86 88 90 91

High 88 91 93 97 99 100
Low 75 79 82 88 90 91

High 84 87 90 97 99 100

Table 2A: ULC Directional Characteristics

-3 dBA: 48 degrees left, 41 degrees right

-6 dBA: 50 degrees left, 58 degrees right

and is equipped with a universal

Voltage Range Per

CAN/ULC-S526-02/S525-99

(VDC/VRMS) (cd)

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Copyright 2005 Wheelock, Inc. All rights reserved. Sheet 1 of 4

WARNING: CANDELA SETTING WILL DETERMINE THE CURRENT DRAW OF THE PRODUCT.

Table 3: Current Ratings (AMPS)

Maximum RMS Current with Hi dBA Setting

Regulated Voltage 15cd 30cd 75cd 110cd
DC 16.0-33.0VDC 0.088 0.125 0.200 0.267
FWR 16.0-33.0VRMS 0.126 0.180 0.289 0.382

Maximum RMS Current with Med dBA Setting

Regulated Voltage 15cd 30cd 75cd 110cd
DC 16.0-33.0VDC 0.074 0.110 0.190 0.253
FWR 16.0-33.0VRMS 0.112 0.172 0.275 0.374

Maximum RMS Current with Low dBA Setting

Regulated Voltage 15cd 30cd 75cd 110cd
DC 16.0-33.0VDC 0.068 0.105 0.182 0.245
FWR 16.0-33.0VRMS 0.105 0.166 0.270 0.370

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: 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.

CANDELA AND SOUND OUTPUT SETTINGS:

To set the candela, slide the switch to the desired setting. The setting is indicated by the pointer and label visible on the bottom side of the lens.

Figure 1: Figure 2: Showing Location of Jumper Plug (Back View)

CODE 3

CANDELA

75

15

1301

0

SLIDE
SWITCH

CANDELA
POINTER

HI

BOTTOM VIEW

Factory setting is on Medium dB, Code 3 and 15 candela.

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.

WARNING: THE AUDIBLE STROBE 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 3: Jumper plug settings for High, Medium, Low and Code 3 Figure 4: Jumper plug setting for Continuous Horn

SHOWN SET ON HIGH dB

HI
MED
LOW

(Use needle nose pliers to pull and properly set the jumper plugs)

NOTE: The AS-24MCW must be set for Code 3 when used with a synchronized notification appliance circuit (NAC).

SHOWN SET ON MED dB

SHOWN SET ON LOW dB

WIRING AND MOUNTING INFORMATION:

CAUTION: The following figures (A-D) show the maximum number of field wires (conductors) that can enter the backbox used with each mounting option. If

these limits are exceeded, there may be insufficient space in the backbox to accommodate the field wires and stresses from the wires could damage the product. Check
that the installed product will have sufficient clearance and wiring room prior to installing backboxes and conduit, especially if sheathed multiconductor cable or 3/4"
conduit fittings are used.

CODE 3

No jumper plug is needed for continuous horn setting. However, it
is recommended that the jumper plug be retained in the unit for
future use (if needed) as shown in Figure 4.

MED
LO

TURN PLUG 90°

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