Carrier WeatherMaker 48TC 06 Installation Instructions Manual

Contents

45NOTE: The accessory space relative humidity sensor andhumidistat are not available for single phase (-3 voltagecode) models.Space Relative Humidity Sensor Connections — The acces-sory space relative humidity sensor (33ZCSENSRH-01) is in-stalled on an interior wall to measure the relative humidity ofthe air within the occupied space.The use of a standard 2 X 4 inch electrical box to accommo-date the wiring is recommended for installation. The sensor canbe mounted directly on the wall, if acceptable by local codes.If the sensor is installed directly on a wall service, install thehumidity sensor using 2 screws and 2 hollow wall anchors(field supplied). Do not over tighten screws. See Fig. 57.Fig. 57 — Space Relative Humidity SensorInstallationThe sensor must be mounted vertically on the wall. TheCarrier logo should be orientated correctly when the sensor isproperly mounted.Avoid corner locations. Allow at least 4 ft between the sen-sor and any corner. Airflow near corners tends to be reduced,resulting in erratic sensor readings. The sensor should be verti-cally mounted approximately 5 ft up from the floor, beside thespace temperature sensor.For wiring distances up to 500 feet, use a 3-conductor, 18 or20 AWG cable. A CCN communication cable can be used,although the shield is not required. The shield must be removedfrom the sensor end of the cable if this cable is used. SeeFig. 58 for wiring details.Fig. 58 — Space Relative Humidity SensorConnectionThe power for the sensor is provided by the PremierLinkcontrol on terminal J5-4 (+33 to +35vdc).To Wire the Sensor1. At the sensor, remove 4 inches of the jacket from thecable. Strip ¼ inch of insulation from each conductor.Route the cable through the wire clearance opening inthe center of the sensor. See Fig. 57.2. Connect a field-supplied BLACK wire to the sensorscrew terminal marked Vin.3. Connect a field-supplied RED wire into the sensor screwterminal marked Io.4. Connect the field-supplied RED wire from the sensor toTB1-13.5. Connect the field-supplied BLACK wire from the sensorto TB1-7.Smoke Detector/Fire Shutdown (FSD) — This function isavailable only when PremierLink is configured for (Space)Sensor Mode. The unit is factory-wired for PremierLink FSDoperation when PremierLink is factory-installed.On 48TC units equipped with factory-installed Smoke De-tector(s), the smoke detector controller implements the unitshutdown through its NC contact set connected to the unit’sCTB input. The FSD function is initiated via the smoke detec-tor’s Alarm NO contact set. The PremierLink communicatesthe smoke detector’s tripped status to the CCN building con-trol. See Fig. 45 and 46, PremierLink wiring schematics.Filter Status Switch — This function is available only whenPremierLink is configured for (Space) Sensor Mode.PremierLink control can monitor return filter status in twoways: By monitoring a field-supplied/installed filter pressureswitch or via supply fan runtime hours.Using switch input: Install the dirty filter pressure switchaccording to switch manufacturer’s instructions, to measurepressure drop across the unit’s return filters. Connect one sideof the switch’s NO contact set to CTB’s THERMOSTAT-R ter-minal. Connect the other side of the NO contact set to TB1-10.Setpoint for Dirty Filter is set at the switch. See Fig. 59.CAUTIONFailure to follow this caution may result in permanentdamage to the sensor.DO NOT clean or touch the sensing element with chem-ical solvents as they can permanently damage the sensor.CAUTIONFailure to follow this caution will result in inaccuratesensor readings.DO NOT mount the sensor in drafty areas such as nearheating or air-conditioning ducts, open windows, fans, orover heat sources such as baseboard heaters, radiators,or wall-mounted dimmers. Sensors mounted in those areaswill produce inaccurate readings.SW2 1 2 3 4 5 6ONIo Vin Gnd VoMOUNTINGHOLESWIRINGOPENINGIo VoVin GndBLACKREDTB1-7TB1-13