SR Products ETL165F-40 Nominal Temperature Rating - Manual (Page 4)

Doc. ETL165F-40-I
9-30-2009
Rev. A
Page 4 of 6
It is possible for the chemical heat core to leave a conductive path after functioning.
Some residual resistance could cause the core to continue to draw a minimal current
from a supply transformer or battery. If this is an installation consideration or
problem it will be necessary to fuse the system upstream to accommodate it. Assure
that any such fusing will not prevent any ETL165F-40 in the system from having
less than the minimum trip current (0.2 ampere minimum) available.
Installation Instructions
Refer to wiring diagram for electrical connections.
The ETL165F-40 is typically mounted on dampers in ductwork; roof hatches; fire
doors, and for other uses where retrofit or replacement of standard fusible links of
forty pound rating (or less) is desired. It is typically attached mechanically by
placing metal straps or “S” hooks through the square link halve opening to provide a
“floating” linear force tension of 2 lbs. minimum, 40 lbs. maximum continuous load
end pull. The ETL165F-40 has a 40 lbs. maximum continuous tensile strength end
pull at standard temperature (which can only be achieved in installation where the
link is subject to equal linear tension). 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. 40 lbs. hanging straight down from the bottom of the link) it is
recommended to allow the link to “float” using “S” hooks, straps or other
attachments.
As the ETL165F-40 is designed to be mounted on dampers in ductwork, the wiring
is subject to the National Electrical Code Para. 300-22 “Wiring in Ducts, Plenums,
and other Air Handling Spaces,” which requires the use of metallic protection of all
such wiring. Accordingly, the ETL165F-40 attachment end is the same diameter as