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22
Legend
Installation Manual
Installing the bubble
There are a variety of bubbles and housings. The interlocking clips and safety cables may vary, but all bubbles
have them.
CAUTION
CAUTION
To attach the bubble to the housing, do the following and see Figure 16 on page 23:
1. Fasten the bubble safety cable to the housing's safety clip.
2. Swing the bubble up to the housing and align the bubble's screws with the housing's bubble screw holes.
If you are installing a plastic pendant-mount housing, there are alignment guides on the housing ring
that straddle the rear-facing screw hole of the bubble ring.
3. Use the following guidelines for tightening the bubble screws.
•
If you are installing a plastic pendant-mount or flush-mount housing, the bubble screws are self-
locking, quarter-turn captive screws and require only a quarter turn to tighten.
•
If you are installing a flush-mount housing, the bubble ring contains a foam pad that requires you
to push up while turning the screws.
•
If you are installing the bubble on a rugged vandal-resistant housing, the screws are tamper-
resistant and require the provided Torx-pinned bit for tightening. Do not tighten those screws to
more than 0.196 kgm (1.42 lb/ft) torque.
4. Clean any fingerprints off of the bubble. See
To prevent damage, do not touch the bubble with your bare hands, do not place the bubble face down on
any surface, and protect the bubble from dust. Oil and acid residue from your hands can etch some bubble
surfaces and is difficult to remove. Use a scratch-resistant cloth or gloves when handling the bubble.
Do not use a power drill with the self-locking, quarter turn captive screws. A power drill can
CAUTION
CAUTION
strip the heads of the screws or the inside of the screw inserts (in the housing) enough to
necessitate replacing the housing.
Cleaning the bubble
on page 29.
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