How do I remove an ESL hard-wired smoke detector?

I'm trying to temporarily remove an ESL hard-wired smoke detector from the ceiling, but I don't know what is holding the darn thing up there. I don't see any screws, and don't want to break anything by forcing it off. I tried turning the main compartment while holding the base and it doesn't budge. What's the proper way to remove this thing without breaking anything?
Thanks.
Jeff
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On Tue, 09 Nov 2004 19:16:51 GMT "jeff" used 11 lines of text to write in newsgroup: alt.home.repair

Call the alarm company first if it's monitored! Assuming it's a model 449 .. There is a small vertical slit on the side of the unit. Push a trim screwdriver in the slit and the cover will hinge downwards. This will give you access to the mounting screws.
It's easier to separate the terminal block from the unit, then to unhook the wiring. (you'll see what I mean)
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I'm not sure about the model number. The cover itself simply pulls off. Underneath the cover is the circular case of the unit, but no holes. There appears to be a small square hole on the side of the unit. (side meaning side of the cylindrical base, but not inside the circle itself). I could try pushing a small screwdriver sideways (parallel to the ceiling). Is this the hole you are talking about?
Thanks,
J.
<<Call the alarm company first if it's monitored! Assuming it's a model 449 .. There is a small vertical slit on the side of the unit. Push a trim screwdriver in the slit and the cover will hinge downwards. This will give you access to the mounting screws.
It's easier to separate the terminal block from the unit, then to unhook the wiring. (you'll see what I mean)>>
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On Tue, 09 Nov 2004 20:03:03 GMT "jeff" used 21 lines of text to write in newsgroup: alt.home.repair

Yes, jam a small screwdriver in there. While holding some pressure on the tab, twist counter-clockwise.
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On Tue, 09 Nov 2004 14:09:06 -0600 "G. Morgan" used 17 lines of text to write in newsgroup: alt.home.repair

Twist the unit - not the screwdriver.
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