wheelock MT-2, MT-3 INSTALLATION INSTRUCTIONS

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INSTALLATION INSTRUCTIONS

MULTITONE APPLIANCES

MT-12/24, MT4-12/24

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

manual for future reference.

GENERAL:

Multitone Appliances are UL Listed for Fire Protective Service and for General Signaling Service. They are listed for both indoor
and outdoor use with the backboxes specified in these instructions. (See Mounting Options A,B,C,D,E,F,G for MT models and H for
MT4 models). Multitone 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. Multitone Appliances can be field set for
either 12VDC or 24VDC operation and are designed for use with either filtered or unfiltered (full-wave-rectified) input voltage. All
inputs are polarized for compatibility with standard reverse polarity supervision of circuit wiring by a Fire Alarm Panel.

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. THE
MULTITONE APPLIANCE MUST BE FIELD SET TO THE DESIRED INPUT VOLTAGE, dBA SOUND OUTPUT
LEVEL AND ALARM TONE BEFORE THEY ARE INSTALLED. THIS IS DONE BY PROPERLY INSERTING A
JUMPER PLUG AND ADJUSTING A FOUR POSITION SWITCH IN ACCORDANCE WITH THESE INSTRUCTIONS.
INCORRECT SETTINGS WILL RESULT IN IMPROPER PERFORMANCE AND MAY DAMAGE THE PRODUCT,
AND COULD RESULT IN PROPERTY DAMAGE, SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.

SPECIFICATIONS:

Table 1: dBA and Current Ratings For Multitone Appliances

Typical Anechoic Rated Reverberant dBA
Input Current Input Current dBA at 10 Feet At 10 Feet Per UL 464

Tone AMPS @ 24VDC AMPS @ 12VDC At Nominal At Minimum At Nominal

Input Voltage Input Voltage Input Voltage

HI STD HI STD HI STD HI STD HI STD
Horn 0.040 0.023 0.100 0.020 101 95 88 82 91 85
Bell 0.014 0.012 0.031 0.010 94 89 82 75 85 79
March Time Horn 0.040 0.023 0.100 0.020 101 95 85 79 88 82
Code 3 Horn 0.040 0.023 0.100 0.020 101 95 85 75 85 79
Code 3 Tone 0.028 0.017 0.060 0.015 97 92 79 75 82 75
Slow Whoop 0.048 0.026 0.100 0.025 101 96 88 82 88 82
Siren 0.036 0.023 0.082 0.020 100 95 85 82 88 82
HI/LO 0.020 0.014 0.044 0.012 95 90 82 79 85 79

Add 25% more input current when operating the unit at maximum input voltage (15.6VDC for 12VDC models, 31VDC for 24VDC
models).

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 typical anechoic values shown in Table 1. Reverberant dBA is a minimum UL rating based on
sound power measurements in a reverberant test room.

Copyright 1993, 1994 Wheelock, Inc. All rights reserved.

P82467-001 F

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Rated Input Voltage: Multitone Appliances set for 24VDC operation are UL Listed to operate over a voltage range from 18VDC to
31VDC and Multitone Appliances set for 12VDC operation are UL Listed to operate over a voltage range of 9VDC to 15.6VDC
using filtered DC or unfiltered FWR input voltage.

Note: FWR voltages are measured with DC volt meter. Multiply FWR voltage by 1.11 to convert to VRMS.

WARNING: MAKE SURE THAT THE TOTAL CURRENT REQUIRED BY ALL APPLIANCES 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 "Input Current" for an individual Multitone then multiply this value
by the total number of appliances; be sure to add the current for any other appliances powered by the same source and include any
required safety factors.

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

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).

WARNING: IF MULTITONE APPLIANCES ARE OPERATED WITHIN 15 INCHES OF A PERSON'S EAR, THEY
CAN PRODUCE A SOUND PRESSURE LEVEL THAT EXCEEDS THE MAXIMUM 120 dBA PERMITTED BY ADA
AND OSHA RULES. EXPOSURE TO SUCH SOUND LEVELS CAN RESULT IN DAMAGE TO A PERSON'S HEARING.

SETTINGS:

The Jumper Plug (DP1) and Switch (SW1) of the Multitone Appliance, shown in Figure 1, are used to set the desired input voltage,
dBA sound output level and alarm tone. The factory settings are shown below. Read these instructions carefully before changing any
of these factory settings.

Figure 1.

PC Board Layout Showing Location

of Jumper Plug (DP1) and Switch (SW1)

The factory settings are:

24VDC DP1 set on 24

HIGH dBA SW1 POS 1 set on 1

HORN TONE SW1 POS 2, 3, 4 set on 1, 1, 1

STEP 1:

Set desired input voltage and dBA sound output level as follows (Refer to Figures 2 and 3):

P82467-001 F

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