SR Products ETL69C-40 User Manual

Doc. ETL69C-40-I

9-30-2009

Rev. A

Page 1 of 6

ETL69C-40 SR Products, LLC

ETL69C-40 Electro Thermal Link

The Electro Thermal Link [ ETL69C-40 ] is a multi-purpose, dual response fusible
link / release device. The fusible link portion functions identically to an ordinary
fusible link. Ambient temperature nearing the rated temperature causes the low
temperature alloy to melt, allowing the link halves to separate.

The ETL69C-40 can also be actuated by an electrical impulse. A 0.2 ampere
minimum trip current applied for a 50 millisecond minimum duration starts an
irreversible chemical reaction. This reaction melts the fusible alloy and causes link
separation in 6 to 10 seconds at standard temperature.

The ETL69C-40 was designed to substantially improve life safety and minimize
property damage by providing both ordinary fusible link response times in the event
of fire along with the capacity to instantaneously respond to any type of fire, smoke,
infrared, light detector (etc.) capable of supplying a short duration current impulse.

The design allows for ETL69C-40 substitution or retrofitting of ordinary fusible
links and other actuators or release devices installed in: dampers; doors; roof
hatches; towers; extinguishing systems, and inert chemical or gas release systems.

An inherent major advantage of the ETL69C-40 over other products is the dually
redundant dormancy – it draws no current and stays inertly in place until actuated,
then functions and separates in seconds. The ETL69C-40 is designed and intended
FOR INDOOR (or sheltered) DRY USE ONLY. The ETL69C-40 is an
Underwriters Laboratories listed device manufactured to exacting quality standards.

Doc. ETL69C-40-I

9-30-2009

Rev. A

Page 2 of 6

TECHNICAL DESCRIPTION

The ETL69C-40 is a UL listed fusible link / release device with a 69°C (156°F )
nominal temperature rating and a 5 - 40 pound (2.267 - 18 KG) continuous –
continuous tensile End pull weight rating at standard temperature.

It contains a bridge wire initiated pyrotechnic heating element requiring a 50
millisecond minimum duration all fire current of 200 mill amperes (0.2 ampere)
within a voltage range of 24 VDC (NEC Class 2, low voltage).

In addition, the link has additional circuits that allow an Alarm System listed under
UL 864 9th Edition to supervise (monitor) the product for broken wire, shorts or
grounds in the wires feeding the power to this product.

The fusible link portion is a nominal 1” (25.4 mm) X 3 1/8 (79.4 mm) X ½” (12.7
mm) envelope with ½” (12.7mm) square reinforced openings at the ends to allow
attachment of “S” hooks, straps, or other attachments.

A perforated two piece electrical enclosure houses an 11/16” (17.3 mm) diameter x
1 ¼” (31.7 mm) protruding cylinder containing the pyrotechnic heating element
and attachment wires (UL 1018 Wire Class 1). It provides a means to attach a
standard EMT conduit connector adapter to 3/8” (9.5 mm) or ½” (12.7 mm)
flexible conduit, thereby meeting any requirements such as National Electric Code
specifications for ‘Wiring in Ducts, Plenums, and Other Air Handling Spaces.’

The ETL69C-40 has a 40 lbs. maximum continuous tensile strength at standard
temperature which can only be achieved in installations where the link is subject to
equal linear tension from both ends. If radial, side or “peel” forces are encountered
(which is typical in most smoke damper installations) the weight may have to be
reduced, or the force vectors re-established. For this reason it is not permissible to
bolt or fix one end of the ETL69C-40 in most installations. Even if the installation
is gravity release (i.e. forty pounds hanging straight down from the bottom link