Schneider Electric TAC Xenta 104-A Users Manual

TAC Vista

TAC Pangaea

WorkStation

TAC Xenta 104-A

Product Manual

TAC Vista

TAC Xenta 104-A

Product Manual

Copyright © 2004-2010 Schneider Electric Buildings AB. All rights reserved. This document, as well as the product it refers to, is only intended for licensed users. Schneider Electric Buildings AB owns the copyright of

this document and reserves the right to make changes, additions or deletions. Schneider Electric Buildings AB assumes no responsibility for possible mistakes or errors that might appear in this document.

Do not use the product for other purposes than those indicated in this document. Only licensed users of the product and the document are permitted to use the document or any information therein. Distribution, disclosure,

copying, storing or use of the product, the information or the illustrations in the document on the part of non-licensed users, in electronic or mechanical form, as a recording or by other means, including photo copying or information storage and retrieval systems, without the express written permission of Schneider Electric Buildings AB, will be regarded as a violation of copyright laws and is strictly prohibited.

Trademarks and registered trademarks are the property of their respective owners.

Zone Controller, TAC Xenta 104-A Contents

INTRODUCTION

1 Documentation and Terminology 9

1.1 Documentation........................................................................................................... 9

1.2 Terminology............................................................................................................... 10

REFERENCE

2 Zone Controller TAC Xenta 104 13

2.1 General....................................................................................................................... 13

2.2 Wall Modules............................................................................................................. 14

2.2.1 STR350/351 ............................................................................................................... 14

2.2.2 STR150 ...................................................................................................................... 15

2.2.3 STR100-104............................................................................................................... 16

2.2.4 Wall Module Configuration....................................................................................... 17

2.2.5 General....................................................................................................................... 18

2.2.6 HVAC Controller, Network Installation.................................................................... 18

2.2.7 HVAC Controller, Stand-alone Installation............................................................... 19

3 Installation 21

3.1 Mechanical Installation.............................................................................................. 21

3.1.1 Fitting......................................................................................................................... 21

3.2 Electrical Installation ................................................................................................. 22

3.2.1 General....................................................................................................................... 22

3.2.2 Wiring of TAC Xenta 104 as Typical RTU or HVAC Unit ..................................... 25

3.2.3 Wiring of TAC Xenta 104 as Typical Packaged RTU.............................................. 26

3.2.4 Wiring of TAC Xenta 104 as Controller Applied to Small AHU............................. 27

3.2.5 Connecting to STR150............................................................................................... 28

3.3 Commissioning .......................................................................................................... 28

3.3.1 General....................................................................................................................... 28

3.3.2 Node Status ................................................................................................................29

3.3.3 Configuration Parameters (nci’s)............................................................................... 30

3.3.4 Network Installation.............................................................. ..... .... ............................ 30

3.3.5 Network Variable Binding.................................................... ..... .... ............................ 30

3.3.6 Function Test..............................................................................................................31

4 Configuration Parameters 33

4.1 Basic Parameters...................................................... .................................................. 34

4.2 Other Configuration Parameters ................................................................................ 35

5 Functional Description 39

5.1 General....................................................................................................................... 39

Schneider Electric Buildings AB, Mar 2010 5 (74) 04-00068-01-en

Contents Zone Controller, TAC Xenta 104-A

5.2 The Controller’s Basic Functions............................................................................... 40

5.2.1 Operation Modes ......................................................................... .... ........................... 40

5.2.2 Application and Emergency Modes ........................................................................... 41

5.2.3 Measuring Zone Temperature .................................................................................... 42

5.2.4 Setpoint Calculation ................................................................................................... 43

5.2.5 Control Sequence with TAC Xenta 104-A................................................................. 44

5.2.6 Fan Control................................................................................................................. 44

5.3 More About Functions................................................................................................ 45

5.3.1 Heating ....................................................................................................................... 45

5.3.2 Cooling....................................................................................................................... 46

5.3.3 Economizer.................................................................................................................47

5.3.4 Cascade Control.......................................................................................................... 48

5.3.5 Networked Applications............................................................................................. 48

5.3.6 Stand-alone Applications............................................................................................ 49

5.3.7 Sensor Options............................................................................................................ 49

5.3.8 Auxiliary Alarm Contact............................................................................................ 50

5.3.9 Fan Status Contact...................................................................................................... 50

5.3.10 Alarm.......................................................................................................................... 51

6 Troubleshooting 53

6.1 General ....................................................................................................................... 53

6.2 Inputs and Outputs (nvi/nvo’s)................................................................................... 53

6.3 Troubleshooting Guide............................................................................................... 54

7 Technical Data 55

7.1 Technical Data............................................................................................................ 55

7.2 Dimensions................................................................................................................. 58

8 Communication 59

8.1 General ....................................................................................................................... 59

8.2 Default Settings and Power on................................................................................... 59

8.3 Monitoring Network Variables, Heartbeat................................................................. 60

8.4 Not Accepted Values.................................................................................................. 60

8.5 The Node Object......................................................................................................... 61

8.5.1 The Node Object’s Inputs (nvi).................................................................................. 62

8.5.2 The Node Object’s Outputs (nvo) .............................................................................. 62

8.5.3 The Node Object’s Configuration Parameters (nci)................................................... 62

8.6 The Controller Object................................................................................................. 62

8.6.1 The Controller Object’s Inputs (nvi).......................................................................... 64

8.6.2 The Controller Object’s Outputs (nvo)....................................................................... 65

8.6.3 The Controller Object’s Configuration Parameters (nci)........................................... 66

APPENDIX

A Commissioning Protocol 69

Index 71

6 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

INTRODUCTION

1 Documentation and Terminology

Zone Controller, TAC Xenta 104-A 1 Documentation and Terminology

1 Documentation and Terminology

1.1 Documentation

Enclosed Documentation

TAC Xenta 104 is delivered with an installation instruction:

• Installation instruction, TAC Xenta 104

1.2 Terminology

This handbook contains some abbreviations and terms, which are specific for the zone controller’s applications and network communication. The most common terms are explained in Table 1.1, “Terminology”.

Table 1.1: Terminology

neuron

A communication processor with built-in protocol

node

A communication unit on the network

SNVT Standard Network Variable Type nvixxx Variable that gets its value from another

unit on the network

nvoxxx Variable that is sent to another unit on the

network

ncixxx Configuration parameter; variable that

gets its value from another unit on the network and keeps it during a power failure

service pin Function that can be used during installa-

tion on the network

wink

A confirmation that the connection to a controller via the network is working (a LED is lit for appr. 20 seconds)

LNS

LonWork

Network Services. System tool for installation, configuration and maintenance of LonWorks network

10 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

REFERENCE

2 Zone Controller TAC Xenta 104

3 Installation

4 Configuration Parameters

5 Functional Description

6 Troubleshooting

7 Technical Data

8 Communication

Zone Controller, TAC Xenta 104-A 2 Zone Controller TAC Xenta 104

2 Zone Controller TAC Xenta 104

2.1 General

The TAC Xenta® 104-A is a zone controller intended for roof top unit, small AHU, and unit ventilator applications which have heating, cooling, and economizer functions. The controller maintains a constant zone temperature by sequenced control of the heating, cooling, and OA/RA dampers. By using a discharge air temperature sensor, the discharge and zone temperatures may be controlled in cascade if the TAC Xenta 104A configuration properties are set accordingly.

Cascade control also allows minimum and maximum limiting of the discharge air temperature. The fan On/Off is controlled by a 24 VAC isolated relay contact. The fan mode may be selected to operate continuous during the Occupied mode, or cycle with heating or cooling demand from the zone.

The Controller’s Basic Functions

The controller has a number of built-in functions that are designed to handle normal control situations. There are two operating modes to choose from (occupied and unoccupied) and five application modes (heating only, cooling only, auto changeover, fan only and off).

The zone temperature is measured using a permanent thermistor sensor or a temperature node connected to the network. Setpoint calculations are made in line with defined methods. Fan control during the comfort mode can be either continuous or cycling with heating or cooling functions. The economizer will only function in the cooling or auto changeover modes. If the outdoor air is useful for cooling, the economizer will use it and provide energy savings and prevent damper hunting when cooling is cycling on and off.

For a detailed functional description of all the basic please see Chapter 5.2, “The Controller’s Basic Functions”, on page 40.

More About Functions

Apart from the controller’s basic functions, there are a number of other functions for controlling the climate in the zone; these are described in detail in Chapter 5.3, “More About Functions”, on page 45. Additional external functions that can be connected are also described in this chapter, these include window contact sensor and occupancy sensor.

Schneider Electric Buildings AB, Mar 2010 13 (74) 04-00068-01-en

2 Zone Controller TAC Xenta 104 Zone Controller, TAC Xenta 104-A

Communication

The controller can work either as a stand-alone unit, without being connected to a network during operation, or be a part of a larger system with several other units such as TAC Xenta 300/400 and other zone controllers in the TAC Xenta family.

TAC Vista is an excellent tool for reading variables as well as a configuration tool for commissioning and/or operation purposes. When TAC Vista is not part of the system, reading and configuration of variables can be made from the operating panel TAC Xenta OP, version 3.11 or later.

The controller is LonMark

TP/FT-10 network via a twisted-pair, unpolarized cable. If you

Talk want to know more about the LonWorks

approved and communicates on a Lon-

technology visit www.eche-

lon.com or www.lonmark.org.

2.2 Wall Modules

A temperature sensor must be mounted within in the zone to be controlled. In the STR series of wall modules the temperature sensor is combined with various types of user interface. Several STR models can be used with the TAC Xenta 104-A; the choice is determined by the desired functionality and user interface.

2.2.1 STR350/351

• STR350/351. Wall unit with temperature sensor and LCD display. Extensive functionality for zone control. Communicates with the controller over LonWorks.

• STR150. Wall unit with temperature sensor and LCD display. Incorporates the most common functions for zone control. Oneway serial communication with the controller.

• STR100-104. Wall module with temperature sensor and controls for the most common zone control functions. STR100-104 signals are hard-wired to TAC Xenta 104-A I/O.

STR350/351 communicates over LonWorks. LonWorks is used for all data exchanges between the room unit and the controller.

STR350/351 has the following functionality when used with TAC Xenta 104-A:

• Temperature sensor . Use either the built in thermistor element or any other temperature sensor available on the LonWorks network

• Actual temperature display. The actual zone temperature ca n be displayed on the LCD. It can also be hidden if preferred.

• Temperature setpoint display. The temperature setpoint can be displayed, either as an absolute value or as an offset.

14 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

Zone Controller, TAC Xenta 104-A 2 Zone Controller TAC Xenta 104

Fig. 2.1: Wall module STR150

Bypass button

Increase/Decrease buttons

Fan speed control

Display

• Temperature setpoint adjustment. The temperature setpoint can

be adjusted, either as an absolute value or as an offset.

• Bypass or on/off button. The bypass function forces the control-

ler to comfort mode for a configurable period of time. The same button can also be used as an on/off button.

• Mode Indicator. An On/Off symbol in the LCD indicates the

mode of the control.

See STR350/351 configuration and data sheets for more details about the technical characteristics listed above, additional functions and configuration details.

Use the LNS plug-in to configure STR350/351.

2.2.2 STR150

STR150 is connected to TAC Xenta 104-A using two or three wires; the third wire is used if mode indication in the LCD is required. On the other two wires information is sent from the wall unit to the controller:

• Zone temperature. The temperature sensed by the thermistor ele-

ment.

• Temperature setpoint. The temperature setpoint is displayed as

an absolute temperature, but transmitted as an offset to the configured reference temperature.

• Bypass button. The bypass button forces the controller to comfort

mode for a fixed period of time (2h).

The mode indication signaled on the third wire is connected to the symbol of a man in the LCD:

• Comfort mode (On) is indicated by a steady symbol

Schneider Electric Buildings AB, Mar 2010 15 (74) 04-00068-01-en

2 Zone Controller TAC Xenta 104 Zone Controller, TAC Xenta 104-A

Fig. 2.2: Wall module STR104 as an example

Mode indicator On/Off

Bypass button

Temperature setting wheel

• Economy (Standby) mode is indicated by a flashing symbol.

• If the symbol is not shown (off) the zone is unoccupied.

There is no communication from the controller to the unit. This means that if a setpoint is changed using TAC Vista, the new value cannot be displayed on STR150.

STR150 is configured using the buttons and display on the unit. See STR150 configuration and data sheets for details.

2.2.3 STR100-104

STR100-104 is a series of room units that connect to the I/O terminals of TAC Xenta 104-A. The functionality of the various models are shown in the Table 2.1, “STR100-104 functionality”.

Table 2.1: STR100-104 functionality

Model Temp Sensor

STR100 X STR101 X X STR102 X X X STR103 X X X STR104 X X X X

Mode

Indicator

Setpoint

Adjustment

Bypass Button

Note

• The TAC Xenta OP is normally connected directly to the controller, not the wall module. The TAC Xenta 101-VF has a TAC Xenta OP access connecter (type RJ-10) on the controller instead of dedicated terminals for the wall module.

16 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

Zone Controller, TAC Xenta 104-A 2 Zone Controller TAC Xenta 104

Depending on model the following functionality may also be present:

• Temperature Sensor. All models have a 1.8Kohms@25°C ther-

mistor element.

• Temperature Adjustment. The temperature setpoint can be

adjusted. Using the plastic keys on the rear of the core panel the adjustment range can be set.

• Mode Indicator. The green LED indicates the control mode:

• Comfort mode (On) is indicated by a steady green light

• If the LED is off the zone is unoccupied.

• Bypass button. The bypass button forces the controller to comfort

mode for fixed period of time (2h).

Refer to STR100-107 data sheet and installation sheet for details.

2.2.4 Wall Module Configuration

Wall Module Choice

STR150 is enabled by nciAppOptions bit 14:

• 0 = ZS, STR100-104 or STR350/351 (default)

•1 = STR150 This can be set using the LonMaker Xenta100 plug-ins in Toolpack ver-

sion 2.01 or higher, or by means of TAC Xenta OP.

Initial Start Up Status

• SpaceTemp in the application is set to +20.00 Celsius (This can not be read in the nviSpaceTemp, however it can be read in nvoSpaceTemp)

• Fan is set to Fan Auto

TAC Xenta can now accept for data from the STR module. If no room temperature readings are received within 10 minutes, the

SpaceTemp in the application is set to “invalid”. This is shown as “invalid” in nvoSpaceTemp.

When the first update is received then the 10-minute limit is changed to 5 minutes.

Unless there is a restart, the Offset + Fan values are not cleared and the last value is valid.

Note

• Fore more information on how to configure and engineer the STR series of wall modules see respective product documents.

Schneider Electric Buildings AB, Mar 2010 17 (74) 04-00068-01-en

2 Zone Controller TAC Xenta 104 Zone Controller, TAC Xenta 104-A

2.2.5 General

The controller is suitable for a variety of applications such as RTU (Roof Top Units), small Unit Ventilators and small AHU (Air Handling Units).

Cooling control is achieved by one or two cooling stages in sequence based on zone temperature from the wall module.

Heating control is achieved by one or two heating stages based on zone temperature or as an alternative tri-state valve control based on discharge air temperature.

For economizer control a sensor is connected in the mixed- or discharge air stream depending of application.

A fan is controlled according to configuration settings. Different configuration options can be chosen to fit both networked and

stand-alone applications. The TAC Xenta 104 controller incorporates several features:

• a fan status switch to stop the heating and cooling functions, c an be connected.

• an auxiliary alarm sensor can be connected.

• the fan can be configured to run continous or cycle on a call for heating or cooling.

• A discharge air temperature sensor can be connected for controlling the discharge air temperature and the zone temperature in cascade.

2.2.6 HVAC Controller, Network Installation

In networked applications a SNVT supplies the out-door air temperature for economizer and compressor lockout functions.

For economizer control a sensor is connected in the mixed air stream in both two stage and tri-state modes.

For detailed description about networked applications, please see Chapter 5.3.5, “Networked Applications”, on page 48.

In stand-alone applications the outdoor air temperature for economizer and compressor lockout functions is supplied by a physical input.

For economizer control a sensor is connected in the discharge air stream in both two stage and tri-state modes.

18 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

Zone Controller, TAC Xenta 104-A 2 Zone Controller TAC Xenta 104

H1 H2 C1 C2

Fig. 2.3: RTU application for HVAC controller network installation

Economizer

Mixed air temperature sensor

(input B2)

Heating stage

Cooling stage

Alarm

Fan

Fan Status

Discharge air temperature sensor

(optional at input U1)

Wall module

Fig. 2.4: AHU or Unit Ventilator applications for HVAC controller network installation

Economizer

Mixed air temperature sensor

(input B2)

Heating stage

Cooling stage

Alarm

Fan

Fan Status

Discharge air temperature sensor

(input U1)

Wall module

For detailed description about stand-alone applications, please see Chapter 5.3.6, “Stand-alone Applications”, on page 49.

Inc. Dec. C1 C2

2.2.7 HVAC Controller, Stand-alone Installation

In stand-alone applications the outdoor air temperature for economizer and compressor lockout functions is supplied by a physical input.

Schneider Electric Buildings AB, Mar 2010 19 (74) 04-00068-01-en

2 Zone Controller TAC Xenta 104 Zone Controller, TAC Xenta 104-A

H1 H2 C1 C2

Economizer

Outdoor air

sensor

(input U1)

Heating stage

Cooling stage

Alarm

Fan

Fan Status

Discharge air temperature

sensor (input B2)

Wall module

Fig. 2.5: RTU application for HVAC controller, stand-alone

Economizer

Outdoor air

sensor

(input U1)

Heating stage

Cooling stage

Alarm

Fan

Fan Status

Discharge air temperature

sensor (input B2)

Wall module

Fig. 2.6: AHU or Unit Ventilator application for HVAC controller, stand-alone

For economizer control a sensor is connected in the discharge air stream in both two stage and tri-state modes.

For detailed description about stand-alone applications, please see Chapter 5.3.6, “Stand-alone Applications”, on page 49.

Inc. Dec. C1 C2

20 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

Zone Controller, TAC Xenta 104-A 3 Installation

Fig. 3.1: TAC Xenta 104-A fixed on a DIN rail

3 Installation

3.1 Mechanical Installation

3.1.1 Fitting

The TAC Xenta 104-A can either be snapped onto a DIN rail (Fig. 3.1) or fixed to a level surface with two screws. (Fig. 3.2).

Fastening the controller onto a DIN rail:

1 Place the controller on the top of the rail as shown by arrow 1. 2 Twist the controller downwards until it snaps onto the rail as

shown by arrow 2.

3 T o remove use place a screwdriver to locate the lock on the bottom

of the controller and pull down. Lift the controller diagonally upwards and off the rail.

Schneider Electric Buildings AB, Mar 2010 21 (74) 04-00068-01-en

3 Installation Zone Controller, TAC Xenta 104-A

Fig. 3.2: TAC Xenta 104-A fixed to a level surface

Fixing the controller to a level surface:

Use the two sockets provided for fixing the controller; the maximum screw size is M4 or ST 3,5 (Ø 0.15"). The head of the screw should not exceed 7,5 mm (0.3") in diameter.

3.2 Electrical Installation

3.2.1 General

1 Each controller or group of controllers must use max. 6 A fuses. 2 Avoid hanging or loose cables by using clamps to secure them to

the controller.

3 A switch to cut off the power supply to the controller or compete

unit must be easily accessible.

4 Connect U1 and M with a jumper when not used. 5 When several Xenta controllers receive power from a common

transformer, it is important that all Gs are connected to each other and that all G0s are connected to each other. They must not be interchanged. An important exception: G0 on the wall module should not be connected with the other G0’s. Instead it should be connected to the terminal OP on the controller. At the transformer, G0 should be connected to protective earth. This is to get an grounding point for interference diversion.

6 To ensure that the specified measuring accuracy is achieved, the

two M terminals must be connected to the wall module.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.

22 (74) Schneider Electric Buildings AB, Mar 2010

04-00068-01-en

Zone Controller, TAC Xenta 104-A 3 Installation

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Safety Standard

Transformers supplying the controller must comply to the safety standard EN 60 742 or any other relevant safety standard for ELV, 24 V AC. ETL listing: UL 3111-1, first edition and CAN/CSA C22.2 No. 1010.1-

92. When connecting equipment that has an independent power supply,

the power supply must also comply with this norm.

Cable Lengths

For information on communication cable lengths, see TAC Xenta Network Guide, part number 0-004-7460. For all other cables, maximum length is 30 m (100 feet) and min. area is 0,7 mm

(AWG-19).

The Wall Modules

The STR100-104 is primarily intended for use with the Xenta 104-A. For more information about how to connect and configure wall modules, please refer to the documentation for each respective product.

Schneider Electric Buildings AB, Mar 2010 23 (74) 04-00068-01-en

+ 51 hidden pages