Edwards Signaling ESL 700 SERIES - Manual (Page 3)

3 ESL 700 Series
Testing the System
After all connections are completed and the wiring is checked per NFPA
72, apply power to the system. There should not be an alarm. If there is,
power down the system and determine whether a unit is latched or if there
is a problem with the wiring. If no alarm has occurred, go to the last unit
and check the unit power with a volt meter for the specified voltage.
Testing Each Detector
1 . Prior to testing, remove the red dust cover. The units will not work
with the dust cover in place.
2 . Disconnect alarm notification appliances, releasing service devices,
and extinguishing systems prior to detector tests.
3 . Be sure to reconnect all devices at the conclusion of testing.
Smoke Test
The units should be tested in place annually using one of the following
methods:
1. Use Smoke! in a can ® and follow the directions on the can.
OR
2. Hold a smoldering punk or cotton wick close to the unit and gently
direct the smoke into the smoke entry openings for 20 seconds or until
an alarm is indicated.
The unit performs a smoke test every 9 seconds while flashing its LED. If
smoke is detected, the rate of sampling increases to every 4.5 seconds.
Excessive smoke must be detected in three consecutive tests for the alarm
to sound. BE SURE TO PROPERLY EXTINGUISH THE SMOKE
SOURCE AFTER TESTING!
If it is successful, the LED will remain lit. This is a gross, go/no-go test and
is not a reliable indication of unit sensitivity. For in-depth sensitivity
testing, see Sensitivity Test. To reset the detector, operate the system reset
switch for 2 to 3 seconds to remove power from the detectors. Control
unit alarm and all ancillary functions should be verified for a complete test
of each detector.
Sensitivity Test
1 . Hold the magnet near the integral reed switch of the unit for more
than one second (see Figure 10). 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 Flashes Flashes Flashes 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 blinks, if the sensitivity is found to be within limits
and if all other tests pass, the detector will go into alarm until reset by the
panel. If the sensitivity is not within limits, or an unserviceable hardware
fault has been detected, the alarm LED will continue to flash once per
second until the detector is reset by the panel. If sensitivity test indicates an
unacceptable level, take action recommended above. If action does not
result in acceptable sensitivity, replace unit.
Maintenance
If a unit 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 require-
ments without the need for external meters.
In accordance with NFPA 72, unit sensitivity should be checked within one
year of installation and every alternate year thereafter, in commercial in-
stallations, or every three years in residential sites.
The unit’s replaceable optical block chamber unsnaps for easy field cleaning
and service. Whenever the LED indicates cleaning is necessary, follow these
steps:
1 . Remove the detector cap (see Figure 8), unsnap and throw away the
optical block chamber (see Figure 9).
2. Thoroughly blow off the optical base and snap a new optical block
chamber (part #211) into place.
NOTE: Be sure the new optical block chamber is seated all the way
down.
3. Replace the detector cap and verify sensitivity. See Sensitivity Test.
Figure 7. Removing the detector head
with the locking tab slot removed
Figure 5. Continuity switch
Continuity switch
Figure 6. Installing the detector head
Base
Head
Figure 8. Removing detector cap Figure 9. Optical chamber Figure 10. Sensitivity level test
SQUEEZE
HERE
Detector cap
Field replaceable
optical chamber
Detector cap
Screwdriver slot