Simplex 4098-9687, Installation Instructions Manual

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14
To properly remove and replace the detector to the base (see Figure 1):
1. Remove power from the Stand Alone Duct Detector.
2. Loosen the four screws that secure the clear plastic cover to the housing base.
3. Insert a small blade screwdriver into the lock release slot in the base. Rotate
the detector counterclockwise to remove it from the base.
4. Remove dust cover from the replacement detector.
5. Insert the detector into the base and rotate until fully seated, continue
rotation until lock has been engaged.
6. Secure the clear plastic cover to the housing using the four screws (Torque
screw to 8-10 inch-pounds).
Note
:
An audible “snap” indicates proper contact engagement
.
WARNING: System will not operate with dust cover in place.
Basic Unit Test
With power applied to the Stand Alone Duct Detector, introduce aerosol using the
553-673 Smoke Detector Aerosol Tester into the Duct Detector through the test
port holes (Figure 1). Or, place the 553-810 Magnet Tester next to the test
location on the clear Housing Cover (Figure 12). Observe “ALARM” LED
operation on the detector or the “ALARM” LED and sounder activation at the
4098-9842 Duct Control Station. Restore normal operation by momentarily
removing power, removing and replacing the detector head after aerosol has been
cleared from its chamber, or by activating the “TEST/RESET” switch at the
4098-9842 Duct Control Station.
With the air handling unit turned on, and all filters and dampers in place, open one of
the test port holes (Figure 1) by removing one of the red covers marked “Test” on the
unit. Measure the airspeed velocity inside the duct housing using the Alnor
Instrument Co. Air Velocity Meter (Model 8500) or equivalent (not supplied).
Note : Refer to manufacturer instructions when performing this test.
Insert the probe in the test opening and measure the airspeed directly in front of the
sampling tube. Airspeed measured at this point should be 200 fpm or greater.
Airspeed measured at the inlet is typically 40% – 60% of the actual airspeed in the
duct housing. Any deviation from the recommended installation rules described
previously can cause this measurement to be unreliable.
If the airspeed measurement is less than 200 fpm, then a direct airspeed measurement
should be taken inside the duct. Airspeed inside the duct should be between 300 fpm
and 4000 fpm (91 to 1220m/min) for proper operation of the smoke detector.
Airspeed below 200 fpm measured inside of the duct detector may indicate a
sampling or exhaust tube obstructed by debris. Tubes should be inspected and
cleaned as required.
IMPORTANT: Make sure the test port covers are replaced after testing.
Continued on next page
Installation,
Continued
Detector Replacement
AC or DC Operation Detector
Testing
Periodic Air Test
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