The SED/MED series closers where discontinued in 2000. The SE or ME series from LCN can be used as replacements to provide a hold open feature, but will not have the smoke detectors and are not direct drop in replacements. The SE and ME series will still require rewiring, and the addition of a local smoke detector with a relay base (by others), or an alarm system relay module to release from hold open during a system alarm.
The "DETECTOR IS NOT REPAIRABLE".
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