REPLACE ULTRASONIC MOTION SENSOR

TM 5-6350-275-24&P

3-128. REPLACE ULTRASONIC MOTION SENSOR. (Figure 3-13).

This task consists of:

a. Remove

b. Install

INITIAL SETUP:

Tools:

Equipment Condition:

Screwdriver, Flat tip (Item 7, App B)

Input power removed

Open End Wrench Set (Item 13, App B)

General Safety Instructions:

Materials/Parts:

Remove all jewelry while working on

Ultrasonic Motion Sensor

equipment.

WARNING

Shut off power source before attempting to disconnect, service, or connect wires or cables.

Failure to do so may result in serious injury or death.

a. Removal

(1) Using a flat tip screwdriver, remove front cover (1) from sensor assembly (2).

(2) Tag and disconnect wiring from TB1 (3).

(3) Remove PWA (4) from sensor assembly (2) by gently pressing out on sides of sensor assembly

(2) and lifting out PWA (4).

(4) Remove wiring assembly from sensor assembly (2).

(5) Remove two screws holding sensor assembly (2) to wall and remove sensor case.

b. Installation

(1) Perform steps 1 and 3 above on new sensor assembly.

(2) Align sensor assembly (2) with mounting holes and secure with two screws.

(3) Secure PWA (4) to sensor assembly (2).

(4) Connect tagged wires to PWA TB1 (3).

(5) Align front cover (1) with sensor assembly (2) and snap it into place.

(6) Reconnect input power.

(7) Set sensitive adjustment. Ref. (SAIG, Appendix E, Section 8).

3-236