SR Products ETL165F-40 User Manual

Doc. ETL165F-40-I

9-30-2009

Rev. A

Page 1 of 6

ETL165F-40 SR Products, LLC

ETL165F-40 Electro Thermal
Link The Electro Thermal Link [ ETL165F-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 ETL165F-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 ETL165F-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 ETL165F-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 ETL165F-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 ETL165F-40 is designed and intended
FOR INDOOR (or sheltered) DRY USE ONLY. The ETL165F-40 is an
Underwriters Laboratories listed device manufactured to exacting quality standards.

Doc. ETL165F-40-I

9-30-2009

Rev. A

Page 2 of 6

TECHNICAL DESCRIPTION

The ETL165F-40 is a UL listed fusible link / release device with a 165 F (74 C)
nominal temperature rating and a 2 - 40 pound (1.866 - 18 KG) continuous –
continuous tensile End pull weight rating at standard temperature.

It contains a bridge wire initiated pyrotechnic heating element requiring a fifty (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 ETL165F-40 has a forty (40) pound 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 ETL165F-40 in most installations. Even if
the installation is gravity release (i.e. forty pounds hanging straight down from the