Bryant F - Manual (Page 20)

20
A
E
F
C
D
B
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Fig. 26 -- Typical Smoke Detector System Wiring
Highlight B
Smoke detector NC contact set will open on smoke alarm
condition, de--energizing the ORN conductor.
Highlight C
24--v power signal via ORN lead is removed at Smoke
Detector input on LCTB; all unit operations cease
immediately.
RTU--MP Controls
Unit operating functions (fan, cooling and heating) are
terminated as described above. In addition:
Highlight D
On smoke alarm condition, the smoke detector NO Alarm
contact will close, supplying 24--v power to GRA
conductor.
Highlight E
GRA lead at Smoke Alarm input on LCTB provides 24--v
signal to FIOP DDC control.
RTU--MP
The 24--v signal is conveyed to RTU--MP’s J1--10 input
terminal. This signal initiates the FSD sequence by the
RTU--MP control. FSD status is reported to connected
BAS network.
Using Remote Logic
Five conductors are provided for field use (see Highlight
F) for additional annunciation functions.
Additional Application Data — Refer to Catalog No.
HKRNKA--1XA for discussions on additional control
features of these smoke detectors including multiple unit
coordination. (See Fig. 26.)
Sensor and Controller Tests
Sensor Alarm Test
The sensor alarm test checks a sensor’s ability to signal an
alarm state. This test requires that you use a field provided
SD--MAG test magnet.
OPERATIONAL TEST HAZARD
Failure to follow this caution may result in personnel
and authority concern.
This test places the duct detector into the alarm state.
Unless part of the test, disconnect all auxiliary
equipment from the controller before performing the
test. If the duct detector is connected to a fire alarm
system, notify the proper authorities before
performing the test.
CAUTION
!
Sensor Alarm Test Procedure
1. Hold the test magnet where indicated on the side of
the sensor housing for seven seconds.
2. Verify that the sensor’s Alarm LED turns on.
3. Reset the sensor by holding the test magnet against
the sensor housing for two seconds.
4. Verify that the sensor’s Alarm LED turns off.
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