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SMOKE DETECTORS
Smoke detectors are available as factory-installed options on
50FC models. Smoke detectors may be specified for supply air
only, for return air without or with economizer, or in combination
of supply air and return air. All components necessary for
operation are factory-provided and mounted. The unit is factory-
configured for immediate smoke detector shutdown operation;
additional wiring or modifications to unit terminal board may be
necessary to complete the unit and smoke detector configuration
to meet project requirements.
Units equipped with factory-optional return-air smoke detectors
require a relocation of the sensor module at unit installation. See
Fig. 52 for the as-shipped location.
COMPLETING
INSTALLATION
SMOKE SENSOR
1. Unscrew the two screws holding the return-air smoke
detector assembly. See Fig. 53, Step 1.
2. Save the screws.
3. Turn the assembly 90 degrees and then rotate end to end.
Make sure that the elbow fitting is pointing down. See
Fig. 53, Step 2.
4. Screw the sensor and detector plate into its operating posi-
tion using screws from Step 1. See Fig. 53, Step 3.
5. Connect the flexible tube on the sampling inlet to the sam-
pling tube on the basepan.
STEP 1
OF
RETURN-AIR
Fig. 53 — Completing Installation of Return Air Smoke Sensor
ADDITIONAL APPLICATION DATA
Refer to the application data sheet titled "Factory-Installed Smoke
Detector, for Small and Medium Rooftop Units 2 to 25 Tons" for
discussions on additional control features of these smoke detectors
including multiple unit coordination.
Fig. 52 — Return Air Smoke Detector; Shipping
STEP 2
37
RETURN AIR
SMOKE DETECTOR
(AS SHIPPED)
Position
STEP 3
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