wheelock ET90-24MCCH INSTALLATION INSTRUCTIONS
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Long Branch, NJ 07740
(800) 631-2148 INSTALLATION INSTRUCTIONS
www.wheelockinc.com SERIES ET90-24MCCH MULTI-HIGH CANDELA SPEAKER STROBE
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
GENERAL:
Wheelock’s Series ET90-24MCCH Multi-High-Candela Low Profile Speaker Strobe is UL Listed under Standard 1971 for (Signaling Devices for the Hearing
Impaired) for indoor fire protection service. The ET90-24MCCH is designed for multiple power requirements with high dBA output at each power tap and offer a
choice of field selectable taps, 1/8W to 8W for either 25.0VRMS or 70.0VRMS audio systems. the low profile design incorporates a high efficiency speaker for
maximum output at minimum power across a frequency range of 400Hz to 4000Hz, and features a sealed back construction for extra protection and improved audibility.
The ET90-24MCCH Multi-High-Candela provides two selectable light output intensities in one unit and incorporates a speaker mounting plate attached to the speaker
for ease of installation. The Low Profile Speaker Strobe can provide a non-synchronized strobe appliance when connected directly to a fire alarm control panel (FACP),
or provide a synchronized strobe appliance when used in conjunction with a Sync Module (SM), Dual Sync Module (DSM) or Wheelock power supplies. The strobe
uses a xenon flashtube with solid state circuitry enclosed in a polycarbonate lens to provide maximum visibility and reliability for effective visible signaling. The
ET90-24MCCH is Listed for indoor use, ceiling mount only
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, 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:
Speaker Strobe
Models Voltage Candela
(VRMS)
1/8 1/4 1/2 1 2 4 8 (VDC/VRMS) (VDC/VRMS)
ET90-24MCCH 25/70 75 78 81 84 87 90 93 24 16.0-33.0 115/177
NOTES:
1. The strobe will produce 1 flash per second over the "Regulated Voltage" range.
2. Strobes meet the required light distribution patterns defined in UL 1971.
3. The ET90-24MCCH is UL Listed for indoor use with a temperature range of +32°F to +120°F (0°C to +49°C) and maximum humidity of 85% 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 is not subjected to
misuse or abuse.
4. The maximum supervision voltage is 33 volts DC.
5. Frequency range of speakers is 400-4000Hz.
CAUTION: Always operate audio amplifiers and speakers within their specified ratings. Excessive input may distort sound quality and may damage audio
equipment. Do not exceed 100% of speaker input voltage per UL 1480. Improper input voltage can damage speaker. If distortion is heard, check for clipping of the
audio appliance with an oscilloscope and reduce the amplifier input level or gain level to eliminate any clipping.
WARNING: CANDELA SETTING WILL DETERMINE THE CURRENT DRAW OF THE PRODUCT.
DC 16-33VDC 0.300 0.420
FWR 16-33VRMS 0.455 0.645
When calculating the total currents use Table 2 to determine the highest value of RMS current for an individual strobe, then multiply these values by the total number of
strobes. Be sure to add the currents for any other appliances, including audible signaling appliances powered by the same source, and to include any required safety
factors.
NOTE: The maximum number of strobes on a single notification appliance circuit shall not exceed 50.
CAUTION: These strobes 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: THESE STROBES 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.
CAUTION: Strobes are not designed to be used on coded systems in which the applied voltage is cycled on and off.
with the backboxes specified in these instructions (see wiring and mounting information).
Table 1: UL Listed Models and Ratings
dBA at 10 Feet
(Rated Watts)
Table 2: UL Current Ratings with Strobe Only
Maximum RMS Current (Amps)
UL Voltage 115cd 177cd
Regulated
Voltage
Voltage
Range
Copyright 2005 Wheelock, Inc. All rights reserved. P84454 G
Sheet 1 of 4
WARNING: MAKE SURE THAT THE TOTAL RMS CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE
A B C D E F G H I J
SYSTEM’S PRIMARY AND SECONDARY POWER SOURCES, NOTIFICATION APPLICIANCE CIRCUITS, SM, DSM SYNC MODULES, OR
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.
WIRING AND MOUNTING INFORMATION:
CAUTION: The following figures 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.
Although the limits shown for each mounting option comply with the National Electrical Code (NEC), Wheelock recommends use of the largest backbox option shown
and the use of approved stranded field wires, whenever possible, to provide additional wiring room for easy installation and minimum stress on the product from wiring.
A
4" SQ. X 1-1/2"
EXTENSION RING *
#8-32
SCREWS
SQUARE OR
ROUND GRILLE
AWG #18 AWG #16 AWG #14 AWG#12
FROM PRECEDING SPEAKER
FROM PRECEDING STROBE
APPLIANCE OR SYNC MODULE
OR FIRE ALARM
CONTROL PANEL (FACP)
FLUSH MOUNTING
(STROBE SPEAKER)
4" SQ. X 2-1/8"
BACKBOX
#6-19
SCREWS
MAXIMUM NUMBER OF CONDUCTORS
8 8 8 8
SPEAKER
MOUNTING
PLATE
B
SURFACE
BACKBOX
(SBB)
#8-32
SCREWS
SQUARE
GRILLE
NOTE: BACKBOX IS COMPATIBLE WITH WIREMOLD AND CONDUIT,
MOUNTING HOLES ARE FOR SINGLE-GANG, DOUBLE-GANG,
4" SQ. 3-1/2" & 4" OCTAGON OR ROUND BACKBOXES.
AWG #18 AWG #16 AWG #14 AWG#12
Figure 1: Figure 2:
TO NEXT SPEAKER
OR END OF LINE RESISTOR
(EOLR)
TO NEXT APPLIANCE
OR EOLR
SURFACE MOUNTING
(STROBE SPEAKER)
SPEAKER
MOUNTING
PLATE
#6-19
SCREWS
MAXIMUM NUMBER OF CONDUCTORS
8 8 8 8
• This model has in-out wiring terminals that accept two
#12 to #18 American Wire Gauge (AWG) wires at each
screw terminal. Strip leads 3/8 inches and connect to
screw terminals.
• Break all in-out wire runs on supervised circuits to assure
+ STROBE - COM+
(OPTIONAL)
* Refer to Sync Module instruction sheets SM (P83123), DSM (P83177) or Wheelock power supplies for additional information.
integrity of circuit supervision as shown in Figure 2. The
polarity shown in the wiring diagrams is for operation of
the appliances.
GROUNDING: Connect ground wire to backbox. Install signaling appliance to backbox using mounting screws provided.
WARNING: CHECK ELECTRICAL RATINGS SPECIFIED IN TABLES 1 AND 2 (AS APPROPRIATE) TO ENSURE PROPER ELECTRICAL
INPUT. BE SURE THAT SPEAKER WIRING IS CONNECTED TO SPEAKER TERMINALS ONLY AND STROBE WIRING IS CONNECTED TO
STROBE TERMINALS ONLY. CHECK TO INSURE THAT WIRING AT FACP IS CORRECT. IMPROPER ELECTRICAL INPUT CAN DAMAGE
THE PRODUCT OR CAUSE IT TO MALFUNCTION, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO
YOU AND/OR OTHERS.
Figure 3: Jumper plug is used to select tap
settings which = dBA loudness.
Figure 4: Tap Settings (Factory setting is 70V @
1/2W (Tap F))
1. Each doubling of rated Watts increases sound output by 3
dBA. Field selectable input terminals are provided on
each unit. The following wattage selections are available:
1/8W, 1/4W, 1/2W, 1W, 2W, 4W, & 8W.
2. Each letter corresponds to a plug position of the header
located on the printed circuit board. Select voltage and
A
B
C
D
E
F
G
H
I
J
1
J
wattage as shown in Table 3.
3. A 10 µF blocking capacitor for DC supervision of audio
lines by the FACP is factory wired in series with the
speaker input.
NOTE: Use needle nose pliers to pull and properly insert the jumper plug to the desired tap setting.
P84454 G
Sheet 2 of 4
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