SR Products ETL69C-40 Nominal Temperature Rating - Manual (Page 4)

Doc. ETL69C-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 ETL69C-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 ETL69C-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 5 Lb minimum, 40 Lb maximum continuous load
end pull. The ETL69C-40 has a 40 Lb 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 ETL69C-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 ETL69C-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,