Fenwal F11-Y1 Series Operation & Instruction Manual page 9

(3) Put a Detector into Mounting Base
Please put both insert guides together, and insert Terminal and Attachment of Detector into Mounting
Base. And Turn a Detector Clockwise until make a sound with "a snick". （See above)
！ ！ ！ ！ Warning
･Put Insert guides, Detector Terminal and Attachment together correctly.
It causes trouble.
･Do not turning a detector too much. Also do not make a lack of insertion.
･Do not remove a detector, Fire can not be detected.
･Do not use detector which have impacted. And also do not paint or cover a
detector.
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