Do LCN/Allegion closers keep the UL listing if the cover is not used when installed?
Products should be
installed per the manufacturer’s provided installation instructions to maintain
the appropriate UL listings. The provided installation instructions are
critical in ensuring the appropriate door or frame preparations, fasteners, and
critical components are utilized. Door closers certified for use on fire
door assemblies are provided both with and without covers. In instances
where closers may have both options UL tests those closers in a worst case
scenario. That worst case is always using a cover. Covers can trap
heat and fluids against the doors during the fire tests which may result in
flaming failures. In addition, some plastic covers can combust due to the
high temperatures. LCN closers provided with both plastic or metal covers
have all been tested in this worst case scenario. Our listing files do
not impose restriction on the usage of the cover. Closers that do not
have the covers in the field retain their listings provided the UL label is
present on the body and arm of the closer.
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