This topic has 0 replies, 1 voice, and was last updated 11 months, 3 weeks ago by Brian Turner. Viewing 1 post (of 1 total) Author Posts April 11, 2024 at 4:25 pm #9494 Brian TurnerParticipant Hi everyone, I’m in the process of replacing a Siemens DI-3 conventional photoelectric smoke detector with an OP121 model. Has anyone here gone through this replacement before? Any tips or things to watch out for? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In
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