Johnson Controls NXT-TSO-01 TSO Manuel utilisateur

INSTALLATION GUIDE

Installing and Operating the NXT-TSO-01 TSO Thermostat

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

NET +

NET -

STAT+

STAT-

TSO

Thermostat

Red

Black

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

ELECTRONICCONTROLLER

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

Room Sensor Installation - Page 2

Installation and Operation - Page

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.

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.

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