NOTE:
Some panels support extended addressing. In order to
set the sensor above address number 99 on compatible
systems, carefully remove the stop on the left hand rotary
switch with pliers as shown in Figure 7.
[7] Perform Detector Check
1. Perform STANDBY AND TROUBLE TEST per Section [9.2.1].
2. Perform MAGNET TEST per Section [9.2.2.1]. The RTS451
test of Section [9.2.2.2] may substitute for this requirement.
3. Perform AIR FLOW TEST per Section [9.1].
4. Perform SMOKE RESPONSE TEST per Section [9.1.1].
[8] Install The Cover
Install the cover using the six screws that are captured in the housing cover. Be certain filters are installed as specified in Section [5]. Make sure that
the cover fits into the base groove and that all gaskets are in their proper positions. Tighten the six screws.
[9] Duct Smoke Detector Maintenance and Test Procedures
Test and maintain duct smoke detectors as recommended in NFPA 72. The tests contained in this manual were devised to assist maintenance person-
nel in verification of proper detector operation.
Before conducting these tests, notify the proper authorities that the smoke detection system will be temporarily out of service. Disable the device or
system under test to prevent unwanted alarms.
9.1] Smoke Entry Tests
[9.1.1] Air Flow
This product is designed to operate over an extended air speed range of 100 to 4000 FPM. To verify sufficient sampling of ducted air, turn the air handler
on and use a manometer to measure the differential pressure between the two sampling tubes. The differential pressure should measure at least 0.0015
inches of water and no more than 1.2 inches of water.
Because most commercially available manometers cannot accurately measure very low pressure differentials, applications with less than 500 FPM of
duct air speed may require one of the following: 1) the use of a current-sourcing pressure transmitter (Dwyer Series 607) per Section 9.1.4 or; 2) the
use of aerosol smoke per section 9.1.2.
[9.1.2] Air Flow Test using Aerosol Smoke
This test is intended for low-flow systems (100-500 FPM). If the air speed is greater than 500 FPM, use a conventional manometer to measure differ-
ential pressure between the sampling tubes, as described in 9.1.1.
Drill a
1⁄4
″
hole 3 feet upstream from the duct smoke detector. With the air handler on, measure the air velocity with an anemometer. Air speed
must be at least 100 FPM. Spray aerosol smoke* into the duct through the
1⁄4
″
hole for five seconds. Wait two minutes for the duct smoke
detector to alarm. If the duct smoke detector alarms, air is flowing through the detector. Remove the duct smoke detector cover and blow
out the residual aerosol smoke from the chamber and reset the duct smoke detector. Use duct tape to seal the aerosol smoke entry hole.
*Aerosol smoke can be purchased from Home Safeguard Industries, Malibu, CA. Phone: 310/457-5813.
[9.1.3] Smoke Entry Test
To determine if smoke is capable of entering the sensing chamber, visually identify any obstructions. Plug the exhaust and sampling tube holes
to prevent ducted air from carrying smoke away from the detector head, then blow smoke such as cigarette, cotton wick, or punk directly at the
head to cause an alarm. REMEMBER TO REMOVE THE PLUGS AFTER THIS TEST, OR THE DETECTOR WILL NOT FUNCTION PROPERLY.
[9.1.4] Air Flow Test using Dwyer Series 607 Differential Pressure Transmitter
Verify the air speed of the duct using an anemometer. Air speed must be at least 100 FPM. Wire the Dwyer transmitter as shown in Figure 8. Connect
the leads of the meter to either side of the 1000
Ω
resistor. Allow unit to warm up for 15 seconds. With both HIGH and LOW pressure ports open to
ambient air, measure and record the voltage drop across the 1000
Ω
resistor (measurement 1), 4.00 volts is typical. Using flexible tubing and rubber
stoppers, connect the HIGH side of the transmitter to the sampling tube of the duct smoke detector housing, and the LOW side of the transmitter to
the exhaust tube of the duct smoke detector housing. Measure and record the voltage drop across the 1000
Ω
resistor (measurement 2). Subtract the
J500-42-00
5
I56-2198-003R
Figure 7. Rotary Address Switches
BREAKAWAY STOP
H0112-00
