Carrier T-55 - User Manual

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INSTALLATION INSTRUCTIONS
T-55 SPACE TEMPERATURE SENSOR WITH OVERRIDE
T-56 SPACE TEMPERATURE SENSOR WITH OVERRIDE & SETPOINT ADJUSTMENT
COMPONENT LIST
The Model T-55 Space Temperature Sensor with Override and T-56 Space Temperature Sensor
with Override & Setpoint Adjustment consists of the following components:
• (1) Space temperature sensor
• (2) 6-32" x 1" round head machine screws
LOCATING THE SENSOR
The T-55 and T-56 space temperature sensors measure building interior temperature and should be
located on an interior building wall. The sensor wall plate accommodates the NEMA standard 2 x 4
junction box. The sensor can be mounted directly on the wall surface if acceptable by local codes.
Do not mount the sensor in drafty locations such as near air conditioning or heating ducts, over heat
sources such as baseboard heaters, radiators, or directly above wall mounted lighting dimmers. Do
not mount the sensor near a window that may be opened, or near a wall corner or door. Sensors
mounted in these areas will have inaccurate and erratic sensor readings.
Mount the sensor approximately 5 ft from the floor, in an area representing the average temperature
in the space. Allow at least 4 ft between the sensor and any corner and mount the sensor at least 2 ft
from an open doorway.
Note: Clean sensor with damp cloth only. Do not use solvents.
TO INSTALL THE T-55 AND T-56 SENSOR
(See Figure 1 below)
1. Locate the two Allen-type screws at the bottom of the sensor.
2. Turn the two screws clockwise to release the cover from the sensor wall mounting plate.
3. Lift the cover from the bottom and then release it from the top fasteners.
4. Feed the wires from the electrical box through the opening in the center of the sensor mount-
ing plate.

Summary

Component List

Locating the Sensor

Installing the T-55 and T-56 Sensor

Wiring the T-55 and T-56 Sensor

Connect Red Wire

Connects the Red wire to the SPT terminal on the controller and sensor.

Connect Black Wire

Connects the Black wire to the SPTGND terminal on the controller and sensor.

Connect White;Clr Wire (T-56)

Connects the White/Clr wire to the T-56 terminal and SET terminal block.

Install T-56 Jumper

Installs a jumper between the two center terminals on T-56 sensors.

Wiring the CCN Network Communication Service Jack

CCN Wire Specifications

Specifications for the Carrier Comfort Network (CCN) Communication Bus wiring.

Wire the CCN Service Jack

Instructions for wiring the CCN Service Jack, including stripping and connecting wires.

Carrier T-55 Specifications

General

Brand	Carrier
Model	T-55
Category	Temperature Controller
Language	English