TREND OCC_U User Manual

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OCC/U Ultrasonic Occupancy Detection System Installation Instructions TG101684 Issue 1/C 9/10/96

OCC/U ULTRASONIC OCCUPANCY DETECTION SYSTEM

Installation Instructions

INSTALLATION

(continued)

OCC/UDA/DC

The detector should be mounted in the ceiling at a
height of 2.4 to 3 m. If surface mounting, the
detector’s ‘viewing’ angle should be carefully
considered before fixing. When ‘flush mounted’ the
viewing angle can be optimised after fixing. The
housing can be surface mounted using the back-box
provided, or ‘flush-mounted’ in a ceiling tile using
the rings provided.

If flush mounted:

(1)

Make a 70 mm diameter hole where the
detector is to be mounted.

(2)

Push out the cable entry at the top of the
detector.

(3)

Pass a 3-core cable through ring B and the
hole in the ceiling tile. Ring B should be
above the ceiling.

(4)

Undo the screws holding the two halves of
the detector together and separate them.

(5)

Pass the cable through the cable entry in
the back-box and connect as shown in the
electrical section.

(6)

Re-assemble the detector with Ring A
sandwiched between the two halves.

(7)

Pass the tabs of Ring A through the ceiling
hole and snap Ring B into place.

(8)

To remove detector simply rotate and pull
down.

If surface mounted:

(1)

Make a hole in ceiling and push a 3-core
cable through.

(2)

Undo screws holding the two halves of the
detector together and separate them.

(3)

Fix back-box directly to surface using
2 screws as shown in diagram right.

(4)

Pass the cable through the cable entry in
the back-box and connect as shown in the
electrical section.

(5)

Re-assemble the detector.

Flush Mounting diagram

AAAA

Ring B

Push

back-box

Ring A

Surface Mounting diagram

50 mm

II_OCCU.PM6

28/11/96, 16:52

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