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Return Air
Sampling Tube
C08129
Fig. 59 -- Return Air Sampling Tube Location
Completing Installation of Return Air Smoke Sensor:
1. Unscrew the two screws holding the Return Air
Sensor detector plate. See Fig. 60. Save the screws.
2. Remove the Return Air Sensor and its detector plate.
3. Rotate the detector plate so the sensor is facing out-
wards and the sampling tube connection is on the bot-
tom. See Fig. 61.
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 ex-
haust tube is on the top. See Fig. 61.
5. Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan.
Flexible
Exhaust Tubes
Screws
Sample Tube
C08126
Fig. 60 -- Return Air Detector Shipping Position
C08127
Fig. 61 -- 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.
581J