Johnson Controls NXT-TSO-01 TSO Installation Manual

Introduction The Temperature/Setpoint/Override (TSO) thermostat is a microcontroller- based thermostat that consists of a space temperature sensor, a knob to select the setpoint, an override push button, and an LED indicating occupancy. This thermostat allows occupants to adjust the setpoint and put the controller into Override mode. NXT-TSO-01 TSO Thermostat www.johnsoncontrols.com Figure 2 - Wiring connections for the TSO Thermostat

        TEC DOC # LIT-TD-2007 11/2002 Literature Part # 24-9872-7 Rev. A Figure 1 - TSO Thermostat Installation The thermostat connects to the controller via a 2-wire (#22 AWG, single twisted pair) cable. The NexSys thermostat communica- tions bus carries power and communica- tions for the TSO thermostat. Wiring WARNING - TO PREVENT ELECTRI- CAL SHOCK OR DAMAGE TO THE EQUIPMENT, YOU MUST DISCON- NECT THE POWER SUPPLY TO THE ELECTRONIC CONTROLLER BEFORE YOU MAKE THE WIRING CONNECTIONS. All wiring is low voltage and should be in accordance with local regulations and the National Electrical Code. Use shielded cable only when it is required. Most applications do not require shielding and will benefit from unshielded cable. When using the optional shielded cable, ground only one end of the shield. Low voltage control wiring should not be run in the same conduit as line voltage wiring or other conductors that supply highly- inductive loads (such as contactors, coils, motors, generators, etc.). CAUTION - MAKE ALL CONNEC- TIONS AND CHECK ALL CONNEC- TIONS BEFORE APPLYING POWER. IMPROPER WIRING MAY CAUSE PERMANENT DAMAGE TO THIS EQUIPMENT. Wiring Recommendations Unshielded Stranded, 22AWG: Belden #8442(2- wire), Belden #8444(4-wire) Plenum-rated, Stranded, 22AWG: Belden #82442(2-wire), 82444(4-wire) Stranded, 18AWG: Belden #8461(2- wire), Belden #8489(4-wire) Plenum-rated, Stranded, 18AWG: Belden #87740(2-wire), 82489(4-wire) Shielded Stranded: Belden #8761 Solid: Belden #8450 Plenum-rated, Stranded: Belden #88761other equipment. To Wire the TSO Thermostat: 1. Connect the Red wire of the thermostat’s pigtail to the STAT + terminal of the controller. 2. Connect the Black wire of the thermostat’s pigtail to the STAT - terminal of the controller. Refer to Figure 2 below. Mounting Mount the thermostat where it is exposed to normal air circulation and where it senses the average temperature of the space being controlled (normally about 5 feet above the floor). Do not mount it where it could be affected by heat or cold from windows, pipes, doors, lamps, sunlight, outside walls, or other sources. See Figure 3 for dimen- sions. Figure 3 - TSO Thermostat dimensions

Installation and Operation - Page 2 Repairs and Replacement Do not make field repairs. Please contact Johnson Controls at (800) 765-7773 for replacement and other services. www.johnsoncontrols.com Figure 4 - Mounting the TSO Thermostat Johnson Controls, Inc. reserves the right to update specifications when appropriate. Information contained in this document is based on specifications believed to be correct at the time of publication. ©2000 Johnson Controls, Inc. All rights Reserved. TEC DOC # LIT-TD-2007 11/2002 Literature Part # 24-9872-7 Rev. A To mount the sensor: 1. Install a 2” x 3” outlet box and the thermostat wiring to the controller. 2. Pull the wiring from the outlet box and insert it through the mounting bracket. 3. Assemble the mounting bracket to the outlet box with the two screws provided. 4. Connect the two wire pigtail from the thermostat to the wires in the wall and secure them with wire nuts. Obey wiring polarity (see Figure 2). 5. Push excess wire into the outlet box. 6. Snap the cover to the wall plate. Operation Startup Once activated, the TSO STAT’s LED will turn on for one second, then turn off. After two-and-a-half seconds, it will send the setpoint dial position to the controller and update the LED. If the thermostat detects a communica- tions failure, the LED will flash rapidly for two-and-a-half second time inter- vals. The thermostat samples the space temperature every five seconds using an on-board thermistor. If the tempera- ture changes by more than 0.1 degree Celsius (0.18 degrees Fahrenheit) and it is not in Standby mode, it sends the new temperature to the controller and updates its LED. Modes The TSO thermostat has two operating modes: User and Override. User - In this mode, users can either increase or decrease the setpoint. To increase the setpoint, turn the knob clockwise. The thermostat will send the new dial position to the controller and increase the setpoint. To decrease the setpoint, turn the knob counterclockwise. The thermostat will send the new dial position to the controller and decrease the setpoint. Override - The override mode button acts as a toggle switch. It is used only when the building is in “unoccupied” mode and a user who comes into the building wishes to temporarily change the setpoint. After a user pushes the button, he or she may change the setpoint for an area or office. Then before the user leaves, he or she pushes it again to return that area to “unoccu- pied” mode setpoint.