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Details Series ET Speakers/Strobes, UL listing, design, and features for hearing impaired and audio systems.
Lists UL Listed Models and Ratings, including dBA, voltage, candela, and mounting options for Series ET.
Lists average, peak, and inrush current values for LS, MS, LSM, IS strobes across different DC and VFWR voltages.
Presents candela values in the horizontal plane at various angles for 15cd, 30cd, and 75cd strobe models.
Presents candela values in the vertical plane at various angles for 15cd, 30cd, and 75cd strobe models.
Explains terminal connections for voltage and wattage selection based on Table 5 for Series ET products.
Details grounding requirements for specific models using grounded backboxes and hardware.
Illustrates flush, surface, and semi-flush mounting options with backbox, ring, and wire capacity details.
Covers weather-resistant and concealed conduit mounting options with associated backbox and wiring considerations.
Provides guidance on backbox clearance, conduit entry, field wire management, and avoiding stress on the product.
Notes on indoor/outdoor use for ET-1010, weather resistance, and wattage selection for sound output.
Warns about potential photo-sensitive responses from multiple strobes and recommended flash rate compliance.
Specifies the three-year warranty, proper usage requirements, and exclusions for Wheelock products.
Outlines limitations on liability for claims, including incidental or consequential damages, and price limitations.
The Wheelock Series ET Speakers and Strobe Speakers are UL Listed signaling devices designed for both hearing-impaired individuals and general speaker applications. These devices are suitable for indoor use, with some models also approved for outdoor installations. The LSM strobes, specifically, are listed at 15 candela and meet 75 candela intensity on axis with low current draw.
The Series ET devices serve a dual purpose: providing audible alerts through speakers and visible alerts through integrated strobes. The speakers are engineered for multiple power requirements, delivering high dBA output at each power tap. They offer field-selectable taps ranging from 1/8 to 8 Watts, compatible with either 25.0VRMS or 70.0VRMS audio systems. This flexibility allows for precise adjustment of sound output to suit various environmental needs. The speaker design incorporates high-efficiency components to ensure maximum output at minimum power across a broad frequency range of 400 to 4000Hz. This wide frequency response ensures clear and effective audio signaling. Additionally, the speakers feature a sealed back construction, which provides enhanced protection and improved audibility by preventing sound leakage and protecting internal components from environmental factors.
The strobe speakers integrate a Xenon flashtube with solid-state circuitry, encased in a rugged Lexan® lens. This robust construction is designed for maximum reliability, ensuring effective visible signaling even in demanding conditions. The strobe speakers are available with four UL Listed strobe options: Series LS, LSM, MS, and IS, offering different candela ratings and mounting configurations to meet diverse application requirements. All inputs for these devices are compatible with standard reverse polarity supervision of circuit wiring, a common feature in Fire Alarm Control Panels (FACP), which allows for continuous monitoring of the circuit integrity.
The Series ET devices are designed for versatile installation and operation. The field-selectable wattage taps make it easy to configure the speakers for specific sound output levels and power budgets. This is particularly useful in environments where varying sound levels are required for different zones or areas. The compatibility with both 25.0VRMS and 70.0VRMS audio systems further enhances their adaptability to existing audio infrastructure.
For strobe speakers, the availability of different strobe options (LS, LSM, MS, IS) allows for selection based on the required visible intensity and mounting preference. LS/MS/IS models are listed for both ceiling and wall mount, providing flexibility in placement, while LSM models are specifically designed for wall mount only, ensuring optimal performance in that configuration.
When installing these devices, it is crucial to adhere to the specified wiring guidelines. The in-out wiring terminals are designed to accept two #12 to #18 American Wire Gauge (AWG) wires at each screw terminal, simplifying wiring connections. Leads should be stripped to 3/8 inches for proper contact. For supervised circuits, all in-out wire runs must be broken to maintain circuit supervision integrity. Proper grounding is essential for ET-1010/1080 models, requiring installation to a grounded backbox using the provided lockwashers.
Careful consideration of the total average, peak, and inrush currents is vital during system design. Users must calculate these values for all connected appliances to ensure they do not exceed the power sources' rated capacity or the current ratings of any fuses. Overloading can lead to system failure and compromised emergency signaling. It is also important to note that strobes are not intended for use in coded systems where the applied voltage is cycled on and off.
For installations in open offices or areas with viewing obstructions, special attention must be paid to strobe placement to ensure their operating effect is visible to all intended viewers. The intensity, number, and type of strobes must be sufficient to alert viewers regardless of their orientation. There is a small possibility that multiple strobes in a person's field of view, or reflections from glass/mirrored surfaces, could induce a photo-sensitive response in individuals with epilepsy. To mitigate this risk, Wheelock strongly recommends that the composite flash rate in the field of view does not exceed five (5) Hz at the operating voltage of the strobes. Compliance with applicable laws, standards, regulations, codes, and guidelines regarding strobe intensity and composite flash rate is also strongly advised.
The robust construction of the Series ET devices, including the sealed back for speakers and the rugged Lexan® lens for strobes, contributes to their durability and reduces the need for frequent maintenance. The solid-state circuitry in the strobe speakers further enhances reliability.
Regular operational testing is crucial to ensure the continued functionality of these devices. Wheelock recommends testing at least twice a year, or more often, in accordance with local, state, and federal codes, regulations, and laws. This includes checking for proper electrical input and ensuring that speaker wiring is connected to speaker terminals only and strobe wiring to strobe terminals only. Incorrect wiring can damage the product or cause it to malfunction.
When operating audio amplifiers and speakers, it is important to stay within their specified ratings. Excessive input voltage can distort sound quality and potentially damage the audio equipment. If distortion is detected, an oscilloscope should be used to check for clipping of the audio appliance, and the amplifier input or gain level should be reduced to eliminate clipping. The product is designed to withstand a maximum of +130% of speaker input voltage per UL 1480, but exceeding this can cause damage.
For outdoor installations of ET-1010 speakers, the backbox must be mounted vertically with "TOP" as marked to allow moisture or condensation to drain properly through drain holes. Threaded conduit entrances should be used to ensure water tightness, avoiding knockout entrances. These measures help prevent water ingress and maintain the integrity of the device in outdoor environments.
The design of the devices, with their high-efficiency components and durable materials, aims to minimize the need for extensive maintenance. However, adherence to proper installation procedures and regular testing is key to ensuring their long-term reliability and effective performance in emergency situations.
General| Operating Temperature | 32°F to 120°F (0°C to 49°C) |
|---|---|
| Sound Output | Up to 99 dBA at 10 feet (3 m) |
| Operating Voltage | 24 VDC |
| Maximum Humidity | 95% non-condensing |
| Candela Options | 15, 30, 75, 110, 177 |
| Mounting | Surface mount |
| Color | White |
| Compatibility | Compatible with fire alarm control panels |
| Voltage Range | 16-33 VDC/VAC |
| Flash Rate | 1 Hz (60 flashes per minute) |
| Housing Material | High impact plastic |
