Siemens BACnet ATEC User manual

Siemens Industry, Inc.
125-5050, Rev. AA
Siemens BACnet ATEC
Owner's Manual

Technical specifications and availability subject to change without notice.
© 2010 Copyright Siemens Industry, Inc.
We reserve all rights in this document and in the subject thereof. By acceptance of the document the recipient acknowledges these rights and
undertakes not to publish the document nor the subject thereof in full or in part, nor to make them available to any third party without our prior
express written authorization, nor to use it for any purpose other than for which it was delivered to him.

Copyright Notice
3
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Copyright Notice
Notice
Document information is subject to change without notice by Siemens Industry, Inc.
Companies, names, and various data used in examples are fictitious unless otherwise
noted. No part of this document may be reproduced or transmitted in any form or by
any means, electronic or mechanical, for any purpose, without the express written
permission of Siemens Industry, Inc.
Warning
This equipment generates, uses, and can radiate radio frequency energy. If equipment
is not installed and used in accordance with the instructions manual, it may cause
interference to radio communications. Equipment has been tested and found to comply
within the limits for a Class B digital device pursuant to Part 15 of the FCC rules. These
limits are designed to provide reasonable protection against such interference when
operated in a commercial environment. Operation of this equipment in a residential
area is likely to cause interference. Residential area equipment users are required to
take whatever measures necessary to correct the interference at their own expense.
Service Statement
Control devices are combined to make a system. Each control device is mechanical in
nature and all mechanical components must be regularly serviced to optimize their
operation. Siemens Industry, Inc. branch offices and authorized distributors offer
Technical Support Programs that will ensure continuous, trouble-free system
performance.
For further information, contact your nearest Siemens Industry, Inc. representative.
Copyright 2010 by Siemens Industry, Inc.
FCC Regulations
The manual for an intentional or unintentional radiator shall caution the user that
changes or modifications not expressly approved by the party responsible could void
the user’s authority to operate the equipment.
For a Class B digital device or peripheral, the instructions furnished the user shall
include the following or similar statement, placed in a prominent location in the text of
the manual:
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. 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 in-
stalled and used in accordance with the instructions, may cause harmful interference to

Copyright Notice
4
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
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.
To the Reader
Your feedback is important to us. If you have comments about this manual, please
submit them to: mailto:[e-mail]
Credits
APOGEE, APOGEE GO, InfoCenter Administrator, InfoCenter Report Manager,
InfoCenter Server, InfoCenter Suite, Insight, Staefa, and TALON are registered
trademarks of Siemens Industry, Inc.
Other product or company names mentioned herein may be the trademarks of their
respective owners.
Printed in USA

5
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Copyright Notice.......................................................................................3
How To Use This Manual..........................................................................7
Chapter 1 – Product Overview .................................................................9
Hardware Inputs......................................................................................................10
Hardware Outputs ...................................................................................................10
Power Wiring......................................................................................................11
Communication Wiring.......................................................................................12
Controller LED Indicators...................................................................................12
Temperature Sensors..............................................................................................13
Room Temperature Sensor................................................................................13
Duct Temperature Sensor..................................................................................13
Related Equipment.............................................................................................13
Chapter 2 – Applications........................................................................14
Basic Operation.......................................................................................................14
Sequencing Logic (optional)...............................................................................14
Control Temperature Setpoints..........................................................................14
Day/Night Mode..................................................................................................14
Night Mode Override Switch...............................................................................14
Control Loops.....................................................................................................14
Calibration ..........................................................................................................15
Damper Status Operation...................................................................................15
Fail-safe Operation.............................................................................................15
Heating and Cooling Switchover........................................................................15
Modulate Damper During Heating Mode (optional)............................................16
Hot Water Reheat...............................................................................................16
Electric Reheat...................................................................................................16
Notes..................................................................................................................16
Application 2860 VAV Cooling Only........................................................................17
Application 2861 VAV Cooling or Heating...............................................................17
Application 2862 VAV with Electric Reheat or Baseboard Radiation......................17
Baseboard Radiation..........................................................................................18
Electric Heat Interlock ........................................................................................18
Application 2863 VAV with Hot Water Reheat ........................................................18
Application 2864 VAV Series Fan Powered with Electric Reheat...........................19
Fan Operation ....................................................................................................19
Application 2865 VAV Series Fan Powered with Hot Water Reheat ......................20
Fan Operation ....................................................................................................20
Application 2866 VAV Parallel Fan Powered with Electric Reheat.........................20
Fan Operation ....................................................................................................21
Application 2867 VAV Parallel Fan Powered with Hot Water Reheat.....................21
Fan Operation ....................................................................................................22
Application 2897 Slave Mode..................................................................................22
Using Auxiliary Points.........................................................................................22
Table of contents

6
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Using the Controller as a Point Extension Device..............................................22
Chapter 3 – Point Database ...................................................................24
Chaper 4 – Troubleshooting..................................................................30
Basic Service Information........................................................................................30
Preventive Maintenance..........................................................................................30
Safety Features .......................................................................................................31
Controller LEDs .......................................................................................................31
Glossary..................................................................................................32
Index........................................................................................................35

How To Use This Manual
7
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
How To Use This Manual
This manual is written for the owner and user of the Siemens Industry BACnet VAV
Actuator. It is designed to help you become familiar with the Siemens BACnet VAV
Actuator and its applications.
This section covers manual organization, manual conventions, symbols used in the
manual, and other information that will help you use this manual.
Manual Organization
This manual contains the following chapters:
 Chapter 1, Hardware, describes the hardware components and the accessories
that are used with the BACnet VAV Actuator.
 Chapter 2, Applications for BACnet VAV Actuator, describes the control
applications available in the model of the BACnet VAV Actuator that includes a
terminal block for wireable input/output connections.
 Chapter 3, Point Database, defines the point database descriptors and includes
address and applications.
 Chapter 4, Troubleshooting, describes basic corrective measures you can take
should you encounter a problem when using the BACnet VAV Actuator. For issues
not covered in this chapter, consult your local Siemens Industry representative.
The Glossary describes the terms and acronyms used in this manual.
The Index helps you locate information presented in this manual.
Manual Conventions
The following table lists conventions to help you use this manual in a quick and
efficient manner.
Convention
Examples
Numbered Lists (1, 2, 3…) indicate a
procedure with sequential steps.
1. Turn OFF power to the field panel.
2. Turn ON power to the field panel.
3. Contact y the local Siemens Building
Technologies representative.
Conditions that must be completed or met
before beginning a task are designated with a
⊳
.
Intermediate results (what will happen
following the execution of a step), are
designated with a
⇨.
Results, which inform the user that a task was
completed successfully, are designated with a
⇨.
⊳Composer software is properly installed.
⊳A Valid license is available.
1. Select
Start
>
Programs
>
Siemens
>
GMS
>
Composer
.
⇨
The Project Management window displays.
2. Open an existing project or create a new
one.
⇨
The project window displays.
Actions that should be performed are specified
in boldface font.
Type
F
for Field panels.
Click OK to save changes and close the

How To Use This Manual
8
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Convention
Examples
dialog box.
Error and system messages are displayed in
Courier New font.
The message Report Definition
successfully renamed displays in the
status bar.
New terms appearing for the first time are
italicized.
The PXC Modular continuously executes a
user-defined set of instructions called the
control program .
This symbol signifies Notes. Notes provide
additional information or helpful hints.
Cross references to other information are
indicated with an arrow and the page number,
enclosed in brackets: [→92]
For more information on creating flowcharts,
see Flowcharts [→92].
Manual Symbols
The following table lists the safety symbols used in this manual to draw attention to
important information.
Symbol
Meaning
Description
NOTICE
CAUTION Equipment damage may occur if a procedure or instruction is not
followed as specified. (For online documentation, the NOTICE displays
in white with a blue background.)
CAUTION Minor or moderate injury may occur if a procedure or instruction is not
followed as specified.
WARNING Personal injury or property damage may occur if a procedure or
instruction is not followed as specified.
DANGER Electric shock, death, or severe property damage may occur if a
procedure or instruction is not followed as specified.
Getting Help
For more information about the BACnet VAV Actuator, contact your local Siemens
Industry representative.
Where to Send Comments
Your feedback is important to us. If you have comments about this manual, please
submit them to [e-mail]

Chapter 1 – Product Overview
9
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Chapter 1 – Product Overview
The BACnet Actuating Terminal Equipment Controller (ATEC) is the Siemens Industry
FLN controller used in pressure independent Variable Air Volume applications (See the
following figure.). It provides Direct Digital Control (DDC) for eight applications, and
can operate independently as a stand-alone DDC room controller or networked with a
field panel. The controller provides all input/output, system, and local communication
connections. Hardware consists of the controller and the mounting bracket.
Table 1 lists the BACnet ATEC products that are covered:
Table 1. BACnet ATEC – Electronic Output Applications.
Application Number
Application Description
2860 VAV Cooling Only
2861 VAV Cooling or Heating
2862 VAV with Electronic Reheat or Baseboard
Radiation
2863 VAV with Hot Water Reheat
2864 VAV Series Fan Powered with Electric Reheat
2865 VAV Series Fan Powered with Hot Water
Reheat
2866 VAV Parallel Fan Powered with Electric
Reheat
2867 VAV Parallel Fan Powered with Hot Water
Reheat
2897 Slave Mode
Ordering Notes
Part Number
Description
550-440 BACnet ATEC Model 0001, cooling only (GDE)
550-441 BACnet ATEC Model 0001, cooling only (GLB)
550-445 BACnet ATEC Model 2301, full feature (GDE)
550-446 BACnet ATEC Model 2301, full feature (GLB)

Chapter 1 – Product Overview
10
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Siemens BACnet ATEC
Hardware Inputs
Analog
Air Velocity Sensor (AVS)
Duct temperature sensor (optional) – Application 2861
Room temperature sensor (RTS)
Room temperature setpoint dial (optional)
Digital
Night mode override (optional)
Wall switch (optional)
Hardware Outputs
Analog
None

Chapter 1 – Product Overview
11
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Digital
Application
Damper Actuator All
Fan 2865, 2866, 2867
First valve actuator (required) 2863
Stage 1 electric reheat; or, 2-position heating valve 2862
Stage 1 electric reheat 2864, 2866
Stage 2 electric reheat (optional) 2862, 2864, 2866
Stage 3 electric reheat (optional) 2862
Valve actuator 2865, 2867
Power Wiring
The controller is powered by 24 Vac. Power wiring connects to the two screw terminals
on the controller labeled “C” (Common) and “H” (Hot) on the terminal block labeled “24
VAC”. No earth ground connection is required. See the following figure.

Chapter 1 – Product Overview
12
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Communication Wiring
The controller connects to the field panel by means of a Floor Level Network (FLN)
trunk. Communication wiring connects to the three screw terminals on the controller
labeled “+” (positive), “-“(negative), and “S” (Shield). See the following figure.
Controller LED Indicators
The controller has six Light Emitting Diode (LED) indicators (see the figure Siemens
BACnet ATEC
).
Controller LEDs.
LED Type
Label
(if present)*
LED
Number
Indication
DO LED 3 - LED 5 3 - 5 Indicates the ON/OFF status of the DO
associated with it. A glowing LED indicates
that the DO is energized.
Transmit TX 0 Indicates, when flashing, that the controller is
transmitting information to the field panel.
Receive RX 1 Indicates, when flashing, that the controller is
receiving information from the field panel.
BST
”Basic Sanity
Test”
BST 2 Indicates, when flashing ON and OFF once
per second, that the controller is functioning
properly.
* Some LED labels and numerals may be hidden by the controller cover.
See also
Chapter 1 – Product Overview [9]

Chapter 1 – Product Overview
13
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Temperature Sensors
Room Temperature Sensor
The controller room temperature sensor connects to the controller by means of a cable
terminated at both ends with a six-conductor RJ-11 plug-in connector.
Duct Temperature Sensor
An optional duct temperature sensor provides duct air temperature sensing inputs to
the controller.
For more information about temperature sensors, contact your local Siemens Industry
representative.
Related Equipment
Autozero Module (optional) 540-200
Relay Module
Damper Actuator(s)
Duct Temperature Sensor (optional)
Room Temperature Sensor
Contact your local Siemens Industry representative for product numbers and more
information.

Chapter 2 – Applications
14
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Chapter 2 – Applications
Basic Operation
The BACnet ATEC provides Direct Digital Control (DDC) for Variable Air Volume (VAV)
terminal box applications. Temperature control varies with the application. If present,
heating can be provided by hot water, up to three stages of electric reheat, or optional
baseboard radiation.
Sequencing Logic (optional)
This application has the additional capability to sequence the flow and mechanical
heating when heated supply air is available.
Control Temperature Setpoints
The controller maintains a specified temperature setpoint based on Day/Night mode, or
the heating/cooling mode, or the setpoint dial (if used).
Day/Night Mode
The controller maintains the specified day setpoint temperature during daytime hours
and the specified night setpoint at night.
Night Mode Override Switch
If the ROOM TEMPERATURE SENSOR has an override switch, it can be used to
command the controller into day mode for an adjustable period of time. This only
affects a controller in night mode.
Control Loops
Temperature Loop – Heating Loop – Cooling Loop
Maintain temperature setpoint by changing the flow setpoint or modulating the heat
source (valve/electric heat).
Flow Loop
Maintains flow setpoint by modulating the damper actuator.

Chapter 2 – Applications
15
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Calibration
Air Velocity Sensor
Calibration of the controller's internal air velocity sensor is periodically required to
maintain accurate air velocity readings. Calibration may be set to take place
automatically or manually.
Autozero Module (AZM)
Used when damper cannot be closed and constant airflow is needed.
For a controller used with an AZM, calibration occurs without closing the damper.
Application 6520, 6521, 6522, 6523.
For a controller used without an AZM, the damper is briefly commanded closed to
get a zero airflow reading and an accurate damper position during calibration.
Application 6520, 6521, 6522, 6523.
Hot Water Valve
Calibration of a hot water valve (if used) is done by briefly commanding the valve
closed. Application 2863, 2865, 2867.
Damper Status Operation
It is possible, after a period of operation, for the calculated damper position to differ
from the actual (physical) damper position.
If this occurs, the controller will
automatically compensate for any difference by
readjusting the calculated damper position. This calculated position may not match the
actual position.
Fail-safe Operation
If the air velocity sensor fails, the controller uses pressure dependent control. The
temperature loop controls the operation of the damper.
If the room temperature sensor fails, then the controller operates using the last known
temperature value.
Heating and Cooling Switchover
The heating/cooling switchover determines whether the controller is in heating or
cooling mode by monitoring the room temperature and the demand for heating and
cooling (as determined by the temperature control loops).

Chapter 2 – Applications
16
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Modulate Damper During Heating Mode (optional)
CAUTION
If the damper is set to modulate in heating mode, make sure the controller is in
the appropriate mode for the current supply air temperature.
Applications that have a heating source (valve/electric) can be configured to modulate
the flow setpoint in sequence with the heating source.
Hot Water Reheat
CAUTION
Do not set HTG FLOW MIN to 0 cfm (0 lps). A minimum airflow should be
provided across the heating coils when the heating valve is open.
When the controller is in cooling mode, the heating valve(s) are closed.
The heating loop modulates the heating valve(s) to warm up the room. In cooling
mode, the heating valve is closed.
Electric Reheat
CAUTION
Verify that the equipment is supplied with safeties by others to ensure that there
is airflow across the heating coils when they are to be energized.
The heating loop controls up to three stages of electric reheat to warm up the room.
The electric reheat is time modulated using a duty cycle. When the controller is in
cooling mode, the electric heat is OFF at all times.
Notes
1. If the temperature swings in the room are excessive or if there is trouble in
maintaining the setpoint, contact your local Siemens Industry representative for
more information.
2. The BACnet ATEC, as shipped from the factory, keeps all associated equipment
OFF. The controller and its equipment are released to application control at
start-up.

Chapter 2 – Applications
17
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
3. “Safeties by Others”: This note implies that the associated equipment has safety
features installed, for example adding mechanical stops to the dampers.
Application 2860 VAV Cooling Only
In Application 2860, the controller modulates the supply air damper of the terminal box
for cooling. In order for it to work properly, the central air-handling unit must provide
cool supply air.
See the following figure.
Application 2861 VAV Cooling or Heating
In Application 2861, the controller modulates the supply air damper of the terminal box
for cooling and heating. In order for it to work properly, the central air-handling unit
must provide cool supply air in cooling mode and warm air during heating mode.
See the following figure.
Application 2862 VAV with Electric Reheat or Baseboard Radiation
In Application 2862, the controller modulates the supply air damper of the terminal box
for cooling and controls stages of electric reheat or baseboard radiation for heating.
When in heating, the terminal box either maintains minimum airflow or modulates the
supply air damper. In order for the terminal box to work properly, the central air-
handling unit must provide supply air.
See the following figure.

Chapter 2 – Applications
18
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Baseboard Radiation
Baseboard radiation can be a two-position valve or electrical resistance heating.
If the controller is in cooling mode, the heating valve is closed. When in heating mode,
the controller will operate the heating valve to maintain the heating setpoint.
Electric Heat Interlock
CAUTION
Do not set EHEAT FLOW (the defined minimum) to less than 5%; otherwise, the
electric heat interlock will be disabled.
The electric heat stages will be disabled (turned off) when the electric heat airflow is
less than the defined minimum.
Application 2863 VAV with Hot Water Reheat
In Application 2863, the controller modulates the supply air damper of the terminal box
for cooling and controls a hot water valve or baseboard radiation for heating. When in
heating, the terminal box either maintains minimum airflow or modulates the supply air
damper. In order for the terminal box to work properly, the central air-handling unit
must provide supply air for cooling.
See the following figures.

Chapter 2 – Applications
19
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Application 2864 VAV Series Fan Powered with Electric Reheat
In Application 2864, the controller modulates the supply air damper of the terminal box
for cooling and controls stages of electric reheat for heating. When in heating, the
terminal box either maintains minimum airflow or modulates the supply air damper.
Application 2864 has a series fan for air circulation. In order for the terminal box to
work properly, the central air-handling unit must provide supply air.
See the following figure.
Fan Operation
CAUTION
On series fan powered terminal boxes, the terminal box fan must be
controlled/interlocked to start either before or at the same time as the central air
handler. Failure to do so may cause the terminal box fan to rotate backwards and
cause consequent damage at start up.
In day mode, the fan is ON all the time. In night mode, the fan cycles on when heating
or cooling is required.

Chapter 2 – Applications
20
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
[insert TEC2564CD]
Application 2865 VAV Series Fan Powered with Hot Water Reheat
In Application 2865, the controller modulates the supply air damper of the terminal box
for cooling and modulates a hot water valve for heating. When in heating, the terminal
box either maintains minimum airflow or modulates the supply air damper. Application
2865 has a series fan for air circulation. In order for the terminal box to work properly,
the central air-handling unit must provide supply air.
See the following figure.
Fan Operation
CAUTION
On series fan powered terminal boxes, the terminal box fan must be
controlled/interlocked to start either before or at the same time as the central air
handler. Failure to do so may cause the terminal box fan to rotate backwards and
cause consequent damage at start up.
In day mode, the fan is ON all the time. In night mode, the fan cycles on when heating
or cooling is required.
Application 2866 VAV Parallel Fan Powered with Electric Reheat
In Application 2866, the controller modulates the supply air damper of the terminal box
for cooling and controls stages of electric reheat for heating. When in heating, the
terminal box either maintains minimum airflow or modulates the supply air damper.
Application 2866 has a parallel fan that re-circulates the room air. In order for the
terminal box to work properly, the central air-handling unit must provide supply air.