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Completing Installation of Return Air Smoke
Sensor:
1. Unscrew the two screws holding the Return Air
Sensor detector plate. See Fig. 34. Save the screws.
2. Remove the Return Air Sensor and its detector plate.
3. Rotate the detector plate so the sensor is facing
outwards and the sampling tube connection is on the
bottom. See Fig. 35.
4. Screw the sensor and detector plate into its operating
position using screws from Step 1. Make sure the
sampling tube connection is on the bottom and the
exhaust tube is on the top. See Fig. 35.
5. Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan.
Flexible
Exhaust Tubes
Screws
Sample Tube
C08126
Fig. 34 -- Return Air Detector Shipping Position
C08127
Fig. 35 -- Return Air Sensor Operating Position
Additional Application Data — Refer to Catalog No.
HKRNKA--1XA for discussions on additional control
features of these smoke detectors including multiple unit
coordination.
551J
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