Bryant 580J*08--14D, F Completing Installation of Return Air Smoke Sensor, All Units, Highlight a

Return Air Without Economizer

The sampling tube is located across the return air opening on the unit basepan. (See Fig. 22.) The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat-mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See installation steps.)

Return Air Detector module (shipping position shown)*

Controller module

Return Air Detector Sampling Tube

*RA detector must be moved from shipping position to operating position by installer

C07307

Fig. 22 - Typical Return Air Detector Location

Return Air With Economizer

The sampling tube is inserted through the side plates of the economizer housing, placing it across the return air opening on the unit basepan. (See Fig. 23.) The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat-mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See installation steps.)

Return Air

Sampling Tube

C08129

Fig. 23 - 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. 24.) 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. 25.)

SCREWS

EXHAUST

TUBE

FLEXIBLE

EXTENSION

TUBE

SAMPLING

C08126

Fig. 24 - Return Air Detector Shipping Position

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. 24.)

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.

C08127

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, Smoke Detector Wiring.

Highlight A

JMP 3 is factory-cut, transferring unit control to smoke detector.

580J

19