Wheelock ET70, ET70-241575W, ET90, ET90-241575W Installation Instructions Manual

273 Branchport Avenue INSTALLATION INSTRUCTIONS
Long Branch, NJ 07740 SERIES ET70/90 LOW PROFILE SPEAKERS AND SPEAKER STROBES
[phone]
www.cooperwheelock.com

GENERAL:

Wheelock’s Series ET70/90 Low Profile Speakers and Speaker Strobes are UL Listed under Standard 1971 for Signaling Devices for the Hearing Impaired and UL
Standard 1480 for Speaker Appliances. They are designed for multiple power requirements with high dBA output at each power tap. All models offer a choice of field
selectable taps, 1/8W to 8W for either 25.0VRMS or 70.0VRMS audio systems. Speaker strobes with color lens are not UL approved. 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 Series ET appliances also incorporate a speaker mounting plate attached to the speaker for ease of installation. The
Low Profile Speaker Strobes 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 strobes use a xenon flashtube with
solid state circuitry enclosed in a polycarbonate lens to provide maximum visibility and reliability for effective visible signaling. The 241575W candela wall mounted
strobes are listed at 15 candela under UL Standard 1971 and meet 75 candela intensity on axis with low current draw. The ET70/ET90 Speaker Strobe for wall
mounting
are Listed for

only is available with the UL Listed strobe option: 241575W. The ET70/ET90 Speaker Strobes with color lens are for wall or ceiling mounting. All models

indoor use only with the backboxes specified in these instructions (see wiring and mounting information).

WARNING: PLEASE READ THESE INSTRUCTIONS CAREFULLY. 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 AND SERIOUS INJURY OR DEATH TO
YOU AND/OR OTHERS.

SPECIFICATIONS:

Models

ET70 25/70 75 78 81 84 87 90 93 ---- ---- ---- A,C
ET70-241575W* 25/70 75 78 81 84 87 90 93 24 16-33 15 B,D
ET90 25/70 75 78 81 84 87 90 93 ---- ---- ---- A
ET90-241575W* 25/70 75 78 81 84 87 90 93 24 16-33 15 B,D

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. Models are 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.

6. Candela ratings listed in Table 1 are for clear lens. Derate approximately 25% for amber lens, 55% for green lens, 70% for blue lens and 80% for red lens.

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.

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.

Use this product according to this instruction manual. Please keep this instruction manual for future reference.

Table 1: UL Listed Models and Ratings

Speaker Strobe

dBA at 10 Feet Regulated Voltage Mounting

Voltage (Rated Watts) Voltage Range Candela Options

(VRMS) 1/8 1/4 1/2 1 2 4 8 (VDC/VRMS) (VDC/VRMS)

*241575W models are UL Listed at 15cd and meet 75cd on axis.

Table 2: UL Current Ratings with Strobe Only

Maximum RMS Current (AMPS)

UL Voltage 241575W
DC 16-33VDC 0.090
FWR 16-33VRMS 0.145

Copyright 2007 Cooper Wheelock, Inc. All rights reserved. P83567 P

Sheet 1 of 4

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.

WARNING: MAKE SURE THAT THE TOTAL RMS CURRENT REQUIRED BY ALL APPLIANCES THAT ARE CONNECTED TO THE
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), Cooper 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.
NOTE: Surface backbox (SBB) in Figures C & D, is compatible with wiremold and conduit, mounting holes are for single-gang, double-gang, 4"sq., 3-1/2" & 4"
octagon or round backboxes.

A

4" SQ. X 1-1/2"
EXTENSION RING *

#8-32
SCREWS

FLUSH MOUNTING

(NON-STROBE SPEAKER)

4" SQ. X 2-1/8"
BACKBOX

B

4" SQ. X 1-1/2"
EXTENSION RING *

#8-32
SCREWS

FLUSH MOUNTING

(STROBE SPEAKER)

4" SQ. X 2-1/8"
BACKBOX

SPEAKER
MOUNTING
PLATE

SPEAKER
MOUNTING
PLATE

SQUARE OR
ROUND GRILLE

MAXIMUM NUMBER OF CONDUCTORS

AWG #18 AWG #1 6 AWG #1 4 AWG# 1 2

4 4 4 4

C

SURFACE
BACKBOX
(SBB)

#8-32
SCREWS

SQUARE
GRILLE

MAXIMUM NUMBER OF CONDUCTORS

AWG #18 AWG #1 6 AWG # 1 4 AWG# 12

4 4 4 4

#6-19
SCREWS

SURFACE MOUNTING

(NON-STROBE SPEAKER)

#6-19
SCREWS

SPEAKER
MOUNTING
PLATE

SPEAKER
MOUNTING
PLATE

SQUARE OR
ROUND GRILLE

MAXIMUM NUMBER OF CONDUCTORS

AWG #18 AWG # 1 6 AWG # 1 4 AWG # 12

8 8 8 8

D

SURFACE
BACKBOX
(SBB)

#8-32

SCREWS

SQUARE
GRILLE

MAXIMUM NUMBER OF CONDUCTORS

AWG #18 AWG #16 AWG #14 A W G #12

8 8 8 8

#6-19
SCREWS

SURFACE MOUNTING
(STROBE SPEAKER)

#6-19
SCREWS

Figure 1: Figure 2:

NOTE: ET90 has a round grille. ET70 is shown.

P83567 P

Sheet 2 of 4