SR Products ETL165F-40 Nominal Temperature Rating User Manual

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Doc. ETL165F-40-I


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


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