Wheelock MT-12/24 Installation Instructions Manual

273 Branchport Ave.
Long Branch, N.J. 07740
(800) 631-2148
www.wheelockinc.com
Use this product according to this instruction manual.

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
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:

Tone AMPS @ 24VDC
Horn
Bell
March Time Horn
Code 3 Horn
Code 3 Tone
Slow Whoop
Siren
HI/LO
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.
Thank you for using our products.
INSTALLATION INSTRUCTIONS
MULTITONE APPLIANCES
manual for future reference.
Table 1: dBA and Current Ratings For Multitone Appliances
Input Current Input Current
AMPS @ 12VDC
HI STD HI
0.040 0.023 0.100
0.014 0.012 0.031
0.040 0.023 0.100
0.040 0.023 0.100
0.028 0.017 0.060
0.048 0.026 0.100
0.036 0.023 0.082
0.020 0.014 0.044
MT-12/24, MT4-12/24
. All warnings are printed in bold capital letters.
Typical Anechoic
dBA at 10 Feet
At Nominal
Input Voltage
STD HI STD
0.020 101
0.010 94
0.020 101
0.020 101
0.015 97
0.025 101
0.020 100
0.012 95
Please keep this instruction
Rated Reverberant dBA
At 10 Feet Per UL 464
At Minimum
Input Voltage
HI STD
95 88 82
89 82 75
95 85 79
95 85 75
92 79 75
96 88 82
95 85 82
90 82 79
At Nominal
Input Voltage
HI STD
91 85
85 79
88 82
85 79
82 75
88 82
88 82
85 79
P82467-001 F
Sheet 1 of 6