wheelock AMT-12-24, AMT-241575, AMT-24MCW Service Manual
THE CITY OF
NEW YORK
DEPARTMENT OF BUILDINGS
U
L
®
Series AMT Multitone and AMT Multitone Strobe Appliances
AMT-24MCW
AMT-241575
Description:
The Wheelock Series AMT Multiple Inp ut Electronic
Appliances provide the industry with a UL Standard 1971
and UL Standard 464 combination audible/visual device that
simplifies installation and offers three (3) distinct prioritized
audible signals from three isolated inputs. Priority (1) will
override all other commands upon activation.
The AMT offers a choice of eight (8) self-prioritized sound
combinations for suppression releasing systems, combination
security and emergency evacuation systems and high risk
installations as well as many other applications.
The AMT Strobes are designed for ADA applications while
meeting or exceeding the latest requirements of NFPA 72
(the National Fire Alarm Code), ANSI 117.1 (the American
National Standard For Accessible and Usable Buildings and
Facilities) and UL Standard 1971 (Standard for Signaling
Devices for the Hearing Impaired).
Each AMT Audible and AMT Strobe appliance has two user
selective sound output levels: STANDARD dBA and HIGH
dBA. The AMT Audible provides 12VDC or 24VDC operation,
filtered or FWR. The AMT Strobe Electronic Appliances
operate at 24VDC and may be used with filtered or unfiltered
(full-wave-rectified) input voltages. Separate supervised sets
of input terminals are available for each prioritized input.
Jumper plugs are provided to enable both tone and strobe
to operate simultaneously for all inputs.
The AMT Multitone Strobe Appliances are UL Listed for
indoor use, wall mount, under Standard 1971 for Signaling
Devices for the Hearing Impaired and Standard 464 for
Audible Signal Appliances, and use a Xenon flashtube with
solid state circuitry enclosed in a rugged Lexan® lens to
provide maximum reliability for effective visible signaling.
AMT-12/24
Features:
• Approvals include: UL Standard 1971 and UL Standard
464, FCC, ULC, Factory Mutual (FM), California State Fire
Marshal (CSFM), New York City (MEA)
and Chicago (BFP) See approvals by
model in Specifications and Ordering Information
• Compliance with RFI limits in FCC Part 15, Class B for
compatibility with sensitive detection and communication circuits
• Designed to meet or exceed NFPA/ANSI Standards and
ADA Accessibility Guidelines. Meets OSHA 29 Parts 1910.165
• Three separate prioritized inputs that will activate three isolated
signals
• All inputs are supervised
• Code-3 Horn and Tone meet ANSI/NFPA/ISO temporal pattern
• Two power taps for high dBA and standard dBA @ 10 feet
• Low current draw with low temperature compensation to reduce
power consumption and wiring costs
• AMT Strobe models are available with Wheelock patented
MCW Multi-Candela strobes with field selectable candela
settings at 15/30/75/110cd or with single candela 1575cd
strobes
• AMT with strobe can be wired to flash independently or in
unison with all audible signals
• The strobes can be synchronized using Wheelock sync
modules or power supplies with built in Sync Protocol
• Selectable input voltage (12 or 24 VDC) for non-strobe
applications
• Polarized inputs for compatibility with standard reverse
polarity type supervision of circuit wiring by an alarm panel
• Low cost installation via standard electrical boxes.
Attractive flush or surface mounting options
• No additional trimplate required for flush mounting. Fast
installation with In/Out screw terminals using #12 to #18
AWG
S5391
151-92-E
7125-0785:160
7135-0785:127 (horn)
General:
Wheelock’s AMT Appliances are unique multitone alarm signals with separate input terminals for each sound. They are the ideal choice for suppression systems and emergency signaling systems where distinctive multiple alarm conditions are required. Eight groups of three self-prioritized sound
outputs are provided with separate electrically isolated input terminals for each sound (see Table 1 and Table 5 for sound selections). Sound output
can be field set to provide either HIGH (HI) dBA or STANDARD (STD) dBA sound output level.
All AMT Multitone Strobe models are designed for use with either filtered or unfiltered Full-Wave-Rectified (FWR) input voltage. The AMT Multitone
Strobe Appliances have separate input terminals for alarm tone activation and strobe activation. The strobes can be easily field programmed to operate
independently or in unison with all of the audible alarms. All inputs are polarized for compatibility with standard reverse polarity supervision of circuit
wiring by a fire Alarm Control Panel (F.A.C.P.). In the event that three simultaneous commands occur, priority one will activate. If priority 2 + priority
3 exist, priority 2 will activate.
Table 1: dBA Ratings for AMT Multitone Audible Signals
Tone Tone Description
Horn Broadband Horn (continuous)
Bell 1500 Hz Modulated (0.07 Sec. On/Repeat)
March Time Horn Horn (0.25 Sec. ON/0.25 Sec. Off/Repeat)
Code-3 Horn Horn (ANSI S3.41 Temporal Pattern)
Code-3 Tone 500 Hz (ANSI S3.41 Temporal Pattern)
Slow Whoop 500-1200Hz Sweep (4.0 Sec. On/0.5 Sec OFF/Repeat)
Siren 600-1200 Hz Sweep (1.0 Sec. On/Repeat)
HI/LO 1000/800 Hx (0.25 Sec. On/Alternate)
Vibrating Chime 700 Hz (1.0 Sec. Decay, Repeat)
dBA @ 10ft
(reverberant)
HI Output STD Output HI Output STD Output
92 86 98 92
84 78 91 86
88 82 98 92
88 81 98 92
84 78 94 89
88 83 98 93
89 83 97 92
86 81 92 87
78 71 88 82
dBA @ 10ft.
(anchoic)
Table 2: RMS Current Ratings for AMT Multitone Audible Portion*
RMS Current (amps)
24 vdc 12 vdc
HI Output STD Output HI Output STD Output
Tone
@ 24 VDC UL max* @ 24 VDC UL max*
@ 12
VDC
UL max* @ 12 VDC UL max*
Horn 0.085 0.108 0.034 0.043 0.100 0.210 0.020 0.058
Bell 0.042 0.057 0.020 0.026 0.031 0.117 0.010 0.031
March Time Horn 0.085 0.108 0.026 0.035 0.100 0.210 0.020 0.059
Code-3 Horn 0.085 0.108 0.034 0.043 0.100 0.210 0.020 0.057
Code-3 Tone 0.048 0.060 0.022 0.030 0.060 0.168 0.015 0.052
Slow Whoop 0.087 0.112 0.034 0.044 0.100 0.182 0.025 0.056
Siren 0.081 0.102 0.028 0.038 0.082 0.177 0.020 0.055
HI/LO 0.047 0.064 0.023 0.030 0.044 0.131 0.013 0.028
Vibrating Chime 0.032 0.041 0.015 0.020 0.027 0.090 0.010 0.028
Add strobe current from Table 3 (ordering information) to audible 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. Refer to Installation Instruction Sheet (P84158) for peak and inrush current across the UL listed voltage
range for both filtered and unfiltered full-wave-rectified voltage.
The Series AMT Multitone Strobe Appliances are UL Listed under Standard 1971 for Emergency Devices for the Hearing Impaired and UL Standard
464 for Audible Signal Appliances. They are listed for indoor only use with the backboxes specified in these instructions. AMT models without strobes
are UL 464 Listed for indoor or outdoor use (see mounting options).
Table 3: Strobe RMS Current Ratings
RMS Current (amps)
Model AMT-121575 AMT-24MCW
Candela 1575cd 15cd 30cd 75cd 110cd
@24VDC 0.064 0.041 0.063 0.109 0.140
UL max* 0.101 0.060 0.092 0.165 0.220
* RMS current ratings are per UL average RMS method.
UL max current rating is the maximum RMS current within
the listed voltage range (16-33v for 24v units). For strobes
the UL max current is usually at the minimum listed voltage
(16v for 24v units). For audibles the max current is usually
at the maximum listed voltage (33v for 24v units). For
unfiltered FWR ratings, see installation instructions.
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