Carrier 50TCQA Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

Contents

35downward, into the return air stream. The sampling tube isconnected via tubing to the return air sensor that ismounted on a bracket high on the partition between returnfilter and controller location. (This sensor is shipped in aflat--mounting location. Installation requires that thissensor be relocated to its operating location and the tubingto the sampling tube be connected. See “CompletingInstallation of Return Air Smoke Sensor:” for details.)Return Air Detector Sampling TubeController moduleReturn Air Detector module(shipping position shown)**RA detector must be moved from shipping position to operating position by installerC07307Fig. 61 -- Typical Return Air Detector LocationReturn Air with Economizer — The sampling tube isinserted through the side plates of the economizerhousing, placing it across the return air opening on theunit basepan. See Fig. 61. The holes in the sampling tubeface downward, into the return air stream. The samplingtube is connected via tubing to the return air sensor that ismounted on a bracket high on the partition between returnfilter and controller location. (This sensor is shipped in aflat--mounting location. Installation requires that thissensor be relocated to its operating location and the tubingto the sampling tube be connected. See the followinginstallation procedure.)Return AirSampling TubeC08129Fig. 62 -- Return Air Sampling Tube LocationCompleting Installation of Return Air SmokeSensor:1. Unscrew the two screws holding the Return AirSensor detector plate. See Fig. 63. 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. 64.4. Screw the sensor and detector plate into its operatingposition using screws from Step 1. Make sure thesampling tube connection is on the bottom and the ex-haust tube is on the top. See Fig. 64.5. Connect the flexible tube on the sampling inlet to thesampling tube on the basepan.FlexibleExhaust TubesScrewsSample TubeC08126Fig. 63 -- Return Air Detector Shipping PositionC08127Fig. 64 -- Return Air Sensor Operating PositionAdditional Application Data — Refer to Catalog No.HKRNKA--1XA for discussions on additional controlfeatures of these smoke detectors including multiple unitcoordination.50TCQA