TM 9-4520-272-14&P
0025 00
minute test if CO is still present, the status light will again switch to RED, the alarm relay will close;
and the buzzer will sound.
6. If the detector does not chirp as described in steps 4 or 5, it should be replaced as described in the
section of this work package entitled REPLACE.
1
REPLACE
1. To replace the carbon monoxide detector, remove the fan cover as detailed in the section titled
INSPECT.
2. Pry the top cover (1) off the CO detector with a screwdriver.
3. Remove the two screws (2) that secure the inner assembly (3) to the lower portion (4) of the plastic
case.
4. Partially remove the inner assembly (3) from the lower portion (4) of the plastic case.
5. Remove the screws (5) that secure the lower portion (4) of the plastic case to the mounting plate (6).
6. Remove the lower portion (4) of the plastic case from the mounting plate (6).
7. Disconnect the wiring harness connector (7) connecting the carbon monoxide detector to the heater.
NOTE
It is necessary to partially disassemble the new carbon monoxide detector before it can
be installed in the heater.
8. Connect the wiring harness connector (7) of the new carbon monoxide detector to the wiring harness
in the heater.
9. Pry the top cover (1) off the new carbon monoxide detector with a screwdriver.
0025 00-3