Sensitivity Test; Maintenance - GE 429CT Installation Instructions And Use

Sensitivity Test

1. Hold the magnet on the hinge side of the unit for more than
one second (see Figure 7). The LED will flash 1 to 9 times.
2. Count the number of LED flashes, then use the following
table to determine if any action is necessary.
Flashes
0-1 Indication: Unservicable hardware fault.
Action: Reset and rerun sensitivity test. If the
error persists, replace unit.
2-3 Indication: Unit is becoming insensitive.
Action: Clean and reset the unit. Rerun
sensitivity test. If the error persists,
replace the unit.
4-7 Indication: Unit is within normal sensitivity range.
Action: N/A
8-9 Indication: Unit is becoming too sensitive.
Action: Verify the optical chamber is snapped
down securely. Clean the unit and
replace the optical chamber.
After the sequence of flashes, if the sensitivity is within limits
and all other tests pass, the unit goes into alarm until reset by
the panel. If the sensitivity is not within limits, or an unservice-
able hardware fault is detected, the alarm LED will continue to
flash once per second until the unit is reset by the panel.
Note
CSRH models auto reset.

Maintenance

The smoke detectors are designed for easy field service and
maintenance. If a detector drifts beyond its approved sensitivity
range for more than 24 hours, or fails internal diagnostic tests, the
unit automatically indicates trouble by flashing its LED every
second. This meets field sensitivity testing requirements without
the need for external meters.
Note
Connect to a power supply that will not automatically
reset. Since the self-diagnostics only indicate trouble
after 27 hours, if the power supply automatically resets
every 24 hours the self-diagnostic indication will never
be signaled (the smoke detector will still signal alarm
correctly).
In accordance with NFPA 72, smoke detector sensitivity should
be checked within one year after installation and every alternate
year thereafter, in commercial installations, or every three years in
residential sites. See Sensitivity Test.
The detector's replaceable optical block chamber unsnaps for easy
field cleaning and service. Whenever the status LED indicates
cleaning is necessary, follow these steps:
1. Open the detector cover, unsnap and throw away the optical
block chamber. See Figure 6.
2. Thoroughly blow off the optical base and snap a new optical
block chamber (part #211) back in place.
Note
Be sure the new optical block chamber is seated all the
way down.
3. Close the detector cover and verify sensitivity. See Sensitivity
Test.
4
optical block chamber
indentation
snap into indentation
Figure 6. Detector Maintenance
Figure 7. Sensitivity Testing
Approvals
The smoke detectors are for use in commercial fire protective
signaling systems and in household fire warning systems
(NFPA 72).
429/449 Series
Listed by Underwriter's Laboratories; California State Fire
Marshal approved (Listed # 7272-0447-128); MEA approved
(New York City) (Listed # MEA 64-94-E) Factory Mutual
approved.
optical base
magnet
ESL 429/449