Fiop Smoke Detector Wiring And Response - Carrier 50FC 04 Series Service And Maintenance Instructions

Return Air Smoke Detector
(Operating Position Shown)
Fig. 49 — Return Air Smoke Detector
Operating Position
4. Screw the sensor and detector plate into its operating posi-
tion using screws from Step 1. Ensure the sampling tube
connection is on the bottom and the exhaust tube is on the
top.
5. Connect the flexible tube on the sampling inlet to the sam-
pling tube on the basepan.
6. For units with an economizer, the sampling tube is inte-
grated into the economizer housing but connecting the
flexible tubing to the sampling tube is the same.
Controller
Module
Screws (2)
Sample Tube
Fig. 50 — Typical Smoke Detector System Wiring

FIOP Smoke Detector Wiring and Response

ALL UNITS
The FIOP smoke detector is configured to automatically shut
down all unit operations when a smoke condition is detected. See
Fig. 50, Smoke Detector Wiring.
HIGHLIGHT A
Smoke detector NC contact set will open on smoke alarm condi-
tion, de-energizing the ORN conductor.
HIGHLIGHT B
24-v power signal using the ORN lead is removed at the smoke
detector input on UCB; all unit operations cease immediately.
RTU OPEN CONTROLS
Unit operating functions (fan, cooling and heating) are terminated
as described above. In addition:
HIGHLIGHT C
On smoke alarm condition, the smoke detector NO Alarm contact
will close, supplying 24-v power to GRA conductor.
HIGHLIGHT D
WHT lead at Smoke Alarm input on UCB provides 24-v signal to
FIOP DDC control.
RTU OPEN
The 24-v signal is conveyed to RTU Open-J1-10 input terminal.
This signal initiates the FSD sequence by the RTU Open control.
FSD status is reported to connected BAS network.
USING REMOTE LOGIC
Six conductors are provided for field use (see Highlight E) for ad-
ditional 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.
A
C
B
D
26
E