Carrier 48TC**16 installation instructions Unit Performance Hazard, To wire the sensor

IAQ Sensor

	TB3	PL
SEN	13	J5-2

TB3

COM11J5-3

MOUNTING HOLES

24 VAC

C10285

Fig. 57 - Outdoor CO2 Sensor Connections

Space Relative Humidity Sensor or Humidistat Connections —

Space Relative Humidity Sensor connections: The accessory space relative humidity sensor (33ZCSENSRH-01) is installed on an interior wall to measure the relative humidity of the air within the occupied space.

Io Vin Gnd Vo

SW2

6	5	4	3	2	1
						ON

WIRING OPENING

The use of a standard 2 X 4 inch electrical box to accommodate the wiring is recommended for installation. The sensor can be mounted directly on the wall, if acceptable by local codes.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in permanent damage to the sensor.

DO NOT clean or touch the sensing element with chemical solvents as they can permanently damage the sensor.

!CAUTION

UNIT PERFORMANCE HAZARD

Failure to follow this caution will result in inaccurate sensor readings.

DO NOT mount the sensor in drafty areas such as near heating or air-conditioning ducts, open windows, fans, or over heat sources such as baseboard heaters, radiators, or wall-mounted dimmers. Sensors mounted in those areas will produce inaccurate readings.

If the sensor is installed directly on a wall service, install the humidity sensor using 2 screws and 2 hollow wall anchors (field supplied). Do not over tighten screws. See Fig. 58.

The sensor must be mounted vertically on the wall. The Carrier logo should be orientated correctly when the sensor is properly mounted.

Avoid corner locations. Allow at least 4 ft between the sensor and any corner. Airflow near corners tends to be reduced, resulting in erratic sensor readings. The sensor should be vertically mounted approximately 5 ft up from the floor, beside the space temperature sensor.

For wiring distances up to 500 feet, use a 3-conductor, 18 or 20 AWG cable. ACCN communication cable can be used, although the shield is not required. The shield must be removed from the sensor end of the cable if this cable is used. See Fig. 59 for wiring details.

			C11084	48TC**16
Fig. 58 - Space Relative Humidity Sensor Installation
	TB3-7
BLACK		TB3-13
	RED

Io Vin Gnd Vo

C11085

Fig. 59 - Space Relative Humidity Sensor Connection

The power for the sensor is provided by the PremierLink control on terminal J5-4 (+33 to +35vdc).

To wire the sensor:

1.At the sensor, remove 4 inches of the jacket from the cable. Strip 1/4 inch of insulation from each conduct- or. Route the cable through the wire clearance open- ing in the center of the sensor. See Fig. 58.

2.Connect a field-supplied BLACK wire to the sensor screw terminal marked Vin.

3.Connect a field-supplied RED wire into the sensor screw terminal marked Io.

4.Connect the field-supplied RED wire from the sensor to TB3-13.

5.Connect the field-supplied BLACK wire from the sensor to TB3-7.

Humidistat connections: A humidistat can not be directly connected to the PremierLink controller. Follow the instructions on pages 20 & 21 to connect a humidistat or a thermostat as an electromechanical device.

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