17
4. Screw the sensor and detector plate into its operating position
using screws from Step 1. Make sure the sampling tube con-
nection is on the bottom and the exhaust tube is on the top.
See Fig. 26.
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 integrated
into the economizer housing but the connection of the flexible
tubing to the sampling tube is the same.
Fig. 24 — Return Air Detector Shipping Position
Fig. 25 — Return Air Sensor Operating Position
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. 26 for
smoke detector wiring.
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 condi-
tion, de-energizing the ORN conductor.
HIGHLIGHT C
24-v power signal via ORN lead is removed at smoke detector in-
put on CTB; all unit operations cease immediately.
RTU OPEN CONTROLS
Unit operating functions (fan, cooling and heating) are terminated
as described above. In addition, see below.
HIGHLIGHT D
On smoke alarm condition, the smoke detector NO Alarm contact
will close, supplying 24-v power to GRA conductor.
HIGHLIGHT E
WHT lead at Smoke Alarm input on CTB provides 24-v signal to
FIOP DDC control.
RTU OPEN
The 24-v signal is conveyed to RTU-Open’s 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
Five conductors are provided for field use (see Highlight F in
Fig. 26) 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. 26.
SCREWS
FLEXIBLE
EXHAUST
TUBES
SAMPLE
TUBE
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