![background image](http://html1.mh-extra.com/html/carrier/50lc-14/50lc-14_service-and-maintenance-instructions_2561601019.webp)
19
Fig. 24 — Typical Smoke Detector System Wiring
FIOP Smoke Detector Wiring and Response
ALL UNITS
FIOP smoke detector is configured to automatically shut down
all unit operations when smoke condition is detected. See
Fig. 24.
HIGHLIGHT A
JMP 3 is factory-cut, transferring unit control to smoke detector.
HIGHLIGHT B
Smoke detector NC contact set will open on smoke alarm con-
dition, 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.
HIGHLIGHT D
On smoke alarm condition, the smoke detector NO Alarm con-
tact will close, supplying 24-v power to GRA conductor.
HIGHLIGHT E
WHT lead at Smoke Alarm input on LCTB provides 24-v sig-
nal to FIOP DDC control.
HIGHLIGHT F
Five conductors are provided for field use (see Highlight F in
Fig. 24) for additional annunciation functions.
ADDITIONAL APPLICATION DATA
Refer to the application data document “Factory Installed
Smoke Detectors for Small and Medium Rooftop Units 2 to
25 Tons” for discussions on additional control features of these
smoke detectors including multiple unit coordination. (See
Fig. 24.)
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 use of a field provided SD-
MAG test magnet.
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.
CONTROLLER ALARM TEST
The controller alarm test checks the controller’s ability to initi-
ate and indicate an alarm state.
B
D
A
C
E
F
IMPORTANT: OPERATIONAL TEST ALERT
Failure to follow this ALERT can result in an unnecessary
evacuation of the facility.
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.
IMPORTANT: OPERATIONAL TEST ALERT
Failure to follow this ALERT can result in an unnecessary
evacuation of the facility.
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.
Summary of Contents for 50LC 14
Page 26: ...26 Fig 34 50LC 14 26 Control Wiring Diagram...
Page 27: ...27 Fig 35 50LC 14 26 RTU Open Control Wiring Diagram...
Page 28: ...28 Fig 36 50LC 14 20 208 230V 3 Phase Power Wiring Diagram...
Page 29: ...29 Fig 37 50LC 24 26 208 230V 3 Phase Power Wiring Diagram...
Page 30: ...30 Fig 38 50LC 14 26 460V 575V 3 Phase Power Wiring Diagram...