Carrier 48TC*D08 appendix Completing Installation of Return Air Smoke Sensor

Return Air

Sampling Tube

C08129

Fig. 22 - Return Air Sampling Tube Location

Completing Installation of Return Air Smoke Sensor:

SCREWS

EXHAUST

TUBE

FLEXIBLE

EXTENSION

TUBE

SAMPLING

C08126

Fig. 23 - Return Air Detector Shipping Position

1.Unscrew the two screws holding the Return Air Sensor detector plate. (See Fig. 23.) 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. 24.)

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. 23.)

5.Connect the flexible tube on the sampling inlet to the sampling tube on the basepan.

6.For units with an economizer, the sampling tube is in- tegrated into the economizer housing but the connec- tion of the flexible tubing to the sampling tube is the same.

48TC

C08127

Fig. 24 - 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. 25, 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 condition, de-energizing the ORN conductor.

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