NEC P452H User Manual page 132

5. Install a new lamp housing.
(1)Insert a new lamp housing until the lamp housing is plugged
into the socket.
(2) Push the top center of the lamp housing to secure it.
(3) Secure it in place with the three screws.
• Be sure to tighten the screws.
6. Insert for resetting the filter case.
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8. Maintenance