wheelock MT-24-WM INSTALLATION INSTRUCTIONS

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INSTALLATION INSTRUCTIONS

MULTITONE STROBE APPLIANCES

Use this product according to this instruction manual. Please keep this instruction

manual for future reference.

GENERAL:

The Multitone Strobe Appliances are UL Listed under Standard 1638 for Fire Protective Service, private mode and UL Standard 464
for Audible Signal Appliances. They are Listed for indoor/outdoor use, wall or ceiling mount, with the backbox specified in these
instructions (see Mounting Options). The Multitone Strobe 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.

Multitone Strobe Appliances can be field set to produce any one of eight commonly used alarm tones. Sound output can be field set
to provide either HIGH (HI) dBA or STANDARD (STD) dBA sound output level.

All Multitone Strobe models are designed for use with either filtered DC or unfiltered Full-Wave-Rectified (FWR) input voltage. The
Multitone Strobe Appliances have separate input terminals for alarm tone activation and strobe activation. Shunt wires are provided
to operate both the alarm tone and the strobe simultaneously on a single input circuit (See Wiring Information). All inputs are
polarized for compatibility with standard reverse polarity supervision of circuit wiring by a Fire Alarm Control Panel (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, SERIOUS INJURY OR DEATH TO YOU AND/OR
OTHERS.

SPECIFICATIONS:

Table 1: UL Ratings for Multitone Strobe Appliances

Rated Input Voltage Rated Strobe Input Current Rated Strobe 1

Model (VDC) (AMPS) Candela Per

UL 1638 (cd)

Min Nom Max Min Nom Max
MT-12-WH ---- 12 ---- ---- .150 ---- 15.0cd
MT-24-WH 18 24 31 .075 .075 .078 15.0cd
MT-24-RH 18 24 31 .075 .075 .078 6.0cd
MT-24-WM 18 24 31 .088 .088 .096 117.0cd

1

Strobe candela at -35o Centigrade is reduced to 7.5 candela for WH models, 78 candela for WM models and 3.0 candela for RH

models.

The UL Listed "Rated Voltage" range is 18-31VDC for MT-24-WM/WH/RH and 12VDC for MT-12-WH using either filtered (DC)
or unfiltered full-wave-rectified (FWR) voltage. 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 device.

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.

Copyright 1994, 1998, 1999 Wheelock, Inc. All rights reserved.

P82467-007 C
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Table 2: Current Ratings for Multitone Audible Appliances

Rated Average Rated Average

Tone Tone Description Current (Amps) Current (Amps)

24VDC 12VDC

HI dBA STD dBA HI dBA STD dBA
Horn Broadband Horn (Continuous) 0.040 0.023 0.100 0.020
Bell 1560 Hz Modulated (0.07 Sec. ON/Repeat) 0.014 0.012 0.031 0.010
March Time Horn Horn (0.25 Sec. ON/0.25 Sec. OFF/Repeat) 0.040 0.023 0.100 0.020
Code-3 Horn Horn (ANSI S3.41 Temporal Pattern) 0.040 0.023 0.100 0.020
Code-3 Tone 500 Hz (ANSI S3.41 Temporal Pattern) 0.028 0.017 0.060 0.015
Slow Whoop 500-1200 Hz Sweep (4.0 Sec. ON/0.5 Sec. OFF/Repeat) 0.048 0.026 0.100 0.025
Siren 600-1200 Hz Sweep (1.0 Sec. ON/Repeat) 0.036 0.023 0.082 0.020
HI/LO 1000/800 Hz (0.25 Sec. ON/Alternate) 0.020 0.014 0.044 0.012

Add 25% more input current than shown in Table 2 when operating the unit at maximum input voltage.

Add strobe current from Table 1 to audible appliance current from Table 2 to obtain total current for each unit, if the strobe and
audible are wired to operate in unison on a single circuit.

Table 3: dBA Multitone With Strobe

Anechoic Reverberant
dBA @ 10' dBA @ 10' Per UL 464

Tone Nominal Minimum Maximum

Voltage Voltage Voltage

HI STD HI STD HI STD
Horn 99 93 85 79 88 82
Bell 92 87 79 75 82 75
March Time Horn 99 93 82 75 85 79
Code-3 Horn 99 93 79 75 82 75
Code-3 Tone 95 90 75 *70 79 *73
Slow Whoop 99 94 82 75 85 79
Siren 98 93 82 75 85 79
HI/LO 93 88 79 75 82 75

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 5 dBA to anechoic values shown in Table 3. Reverberant dBA is a minimum UL rating based on sound
power measurements in a reverberant test room.

WARNING: MULTITONE STROBE MODELS SET ON "CODE-3 TONE" WITH STANDARD dBA DO NOT MEET
THE 75 dBA MINIMUM UL REVERBERANT SOUND LEVEL REQUIRED FOR PUBLIC MODE FIRE PROTECTION
SERVICE (NOTED BY * IN TABLE 3). MODELS WITH SETTINGS WHICH PRODUCE LESS THAN 75 dBA MAY
NOT BE HEARD. THIS SETTING IS ACCEPTABLE ONLY FOR GENERAL SIGNALING (NON-FIRE ALARM) USE.
USE THE "HIGH" dBA SETTING WITH THIS TONE OR USE A DIFFERENT TONE FOR PUBLIC MODE SERVICE.

P82467-007 C
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Figure 1.

Table 4.

Models Voltage

18 20 22 24 26 28 31 12
MT-24-WM/WH/RH DC/FWR 0.7 0.8 0.9 1.0 1.1 1.2 1.3 -­MT-12-WH DC/FWR -- -- -- -- -- -- -- 0.6

(For full-wave-rectified input voltage, multiply 1.41 by percent value shown in Figure 1.)

WARNING: MAKE SURE THAT THE TOTAL CURRENT REQUIRED BY ALL DEVICES THAT ARE
CONNECTED TO THE SYSTEM'S PRIMARY AND SECONDARY POWER SOURCES AND SIGNALING CIRCUITS
DOES NOT EXCEED THEIR RATED CURRENT. OVERLOADING THESE SOURCES COULD RESULT IN LOSS OF
POWER AND FAILURE TO ALERT OCCUPANTS DURING AN EMERGENCY.

When calculating the total current: use Table 1 to determine the highest value of "Rated Strobe Average Current" for an individual
strobe (across the expected operating voltage range of the strobe); then multiply this value by the total number of strobes; be sure to
add the current for any other devices, including audible signaling devices, powered by the same source and include any required
safety factors. Use Table 2 to calculate the total audible appliance current in the same manner.

WARNING: MAKE SURE THAT ALL FUSES USED ON SIGNALING CIRCUITS ARE RATED TO HANDLE THE
MAXIMUM INRUSH OR PEAK CURRENT FROM ALL DEVICES ON THOSE CIRCUITS. FAILURE TO DO THIS
MAY RESULT IN LOSS OF POWER TO THE SIGNALING CIRCUIT AND THE FAILURE OF ALL DEVICES ON
THAT CIRCUIT TO OPERATE.

When calculating the maximum inrush: use Figure 1 to determine the highest value of "Rated Inrush Current" for an individual strobe
(across the expected operating voltage range of the strobe); then multiply that value by the total number of strobes on the circuit; be
sure to add the inrush currents from any other devices on that circuit and include any required safety factors. The time duration of the
maximum strobe inrush current is shown in Figure 1. Calculate the maximum inrush current for all Multitone audible appliances in
the same manner. The Multitone audible appliances produce a brief inrush current that lasts for just 2 microseconds but can reach a
peak value of 8.0 Amps (11.2 Amps for FWR input).

Model

Rated

Candela At Various Angles

Per UL 1638

Candela A1 A2 A3 A4 A5 A6/A7
MT-24-WH 15.0cd 15.0 18.8 13.7 15.6 7.4 0.9
MT-12-WH 15.0cd 15.0 16.8 14.4 14.6 6.9 0.6
MT-24-RH 6.0cd 6.0 7.5 5.5 6.2 3.0 0.37
MT-24-WM 117.0cd 117.0 15.2 16.4 6.0 7.0 1.2

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

P82467-007 C
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