Siemens 125-1957 User manual

Siemens Building Technologies, Inc.
APOGEE Unit Vent
Controller ⎯
0 to 10V Output
Owner’s Manual
125-1957 Rev. CA, July 2007

Rev. CA, July 2007
NOTICE
The information contained within this document is subject to change without notice and should not be construed as a
commitment by Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. assumes no responsibility
for any errors that may appear in this document.
All software described in this document is furnished under a license and may be used or copied only in accordance
with the terms of such license.
WARNING
This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance
with the instructions manual, may cause interference to radio communications. It has been tested and found to
comply with the limits for a Class A 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 in which case users at their own expense will be
required to take whatever measures may be required to correct the interference.
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. All Siemens Building Technologies branch offices
and authorized distributors offer Technical Support Programs that will ensure your continuous, trouble-free system
performance.
For further information, contact your nearest Siemens Building Technologies, Inc. representative.
Copyright 2006 by Siemens Building Technologies, Inc.
TO THE READER
Your feedback is important to us. If you have comments about this manual, please submit them to
[email protected]
CREDITS
APOGEE is a registered trademark of Siemens Building Technologies, Inc.
Insight for Minicomputers is a registered trademark of Siemens Building Technologies, Inc.
Insight for Personal Computers is a registered trademark of Siemens Building Technologies, Inc.
Country of Origin: US

I
Table of Contents
How To Use This Manual.................................................................................................iv
Manual Organization......................................................................................................iv
Manual Conventions ................................................................................................... v
Manual Symbols.......................................................................................................... v
Datamate Software ..................................................................................................... v
Getting Help ................................................................................................................vi
Where To Send Comments.........................................................................................vi
Product Overview .............................................................................................................1
Introduction....................................................................................................................1
Ordering Notes............................................................................................................1
Hardware Inputs..........................................................................................................2
Hardware Outputs.......................................................................................................3
Controller LED Indicators............................................................................................4
Temperature Sensors .................................................................................................4
Actuators.....................................................................................................................5
Applications.......................................................................................................................6
Basic Operation .............................................................................................................6
Control Temperature Setpoints...................................................................................6
Day/Night Mode...........................................................................................................6
Valve Configuration.....................................................................................................7
Heating and Cooling Switchover.................................................................................7
Control Loops..............................................................................................................7
Morning Warm-up/Cool-down.....................................................................................8
ON/OFF Coil Valve Control.........................................................................................8
Electric Heat................................................................................................................8
Fan Operation .............................................................................................................8
Fail-safe Operation......................................................................................................8
Application 2281 – Heating and/or Chilled Water Cooling, ASHRAE Cycles I and II .10
Application 2283 – Heating and/or Chilled Water Cooling, ASHRAE Cycle III ..........13
Application 2284 – Heating and DX Cooling, ASHRAE Cycles I and II .....................16
Application 2286 - Heating and DX Cooling, ASHRAE Cycle III.................................18
Application 2287 – Heating and Cooling, Nesbitt Cycle W.........................................20
Overview ...................................................................................................................20
Application 2299 – Slave Mode...................................................................................22
Overview ...................................................................................................................22

APOGEE Unit Vent Controller ⎯ 0 to 10V Output Owner’s Manual
ii
Point Database................................................................................................................23
Troubleshooting..............................................................................................................33
Overview......................................................................................................................33
Basic Service Information .........................................................................................33
Ordering Replacement Parts.....................................................................................34
Preventive Maintenance............................................................................................34
Safety Features.........................................................................................................34
Controller LEDs.........................................................................................................34
Glossary...........................................................................................................................35
Overview......................................................................................................................35

Table of Contents
iii

Siemens Building Technologies,Inc. iv
How To Use This Manual
This manual is written for the owner and user of the Siemens Building Technologies, Inc. Unit
Vent Controller – 0 to 10V, often referred to as controller for the remainder of this manual.
This manual is designed to help you become familiar with the controller and its applications.
This chapter covers manual organization, manual symbols and conventions used and how to
access help.
Manual Organization
This manual contains the following chapters:
•Chapter 1 Product Overview, describes the hardware components and accessories
used with the controller.
•Chapter 2 Applications, describes the control applications available in the controller.
•Chapter 3 Point Database, defines the point database descriptors and includes
addresses and applications.
•Chapter 4 Troubleshooting, describes basic corrective measures to take should you
encounter a problem when using this controller. For issues not covered in this
chapter, contact your local Siemens Building Technologies representative.
•A Glossary describes the terms and acronyms used in this manual.
•An Index is provided to assist you in finding information.

Manual Organization
Siemens Building Technologies, v
Manual Conventions
The following table lists conventions used in this manual.
Convention Example
Actions that you should
perform are specified in
boldface font.
Type Ffor Field panels.
Click OK to save changes and close the dialog box.
Error and system
messages are displayed
in Courier New font.
The message Report Definition successfully renamed
appears in the status bar.
New terms appearing for
the first time are
italicized.
The Open Processor continuously executes a user-defined set of
instructions called the control program.
Manual Symbols
The following table lists symbols that used to draw your attention to important information.
Notation Symbol Meaning
CAUTION: Indicates that equipment damage or loss of data may
occur, if a procedure is not performed as specified.
WARNING: Indicates that personal injury or loss of life may occur to the
user, if a procedure is not performed as specified.
Datamate Software
Datamate is a customer software tool for all controller communications. There are two
versions: Datamate Base, and Datamate Advanced.Datamate Base works on an IBM-
compatible Personal Computer (PC), or a Handheld PC or Pocket PC™ running Windows
CE. Datamate Advanced works only on an IBM-compatible Personal Computer.
With Datamate, you can back up, restore and edit any APOGEE®database (but only
Datamate Advanced allows you to edit points offline). Backing up and restoring a database is
accomplished while connected to any APOGEE®field panel, or to the Automation Level
Network (ALN) or Field Level Network (FLN) device in question. A modem and telephone
lines can also be used. Databases can be saved for permanent storage or used as backup.
For more information on Datamate software, refer to the appropriate user guide for the
version of Datamate you are using (Base or Advanced), or contact your local Siemens
Building Technologies, Inc. representative.

APOGEE Unit Vent Controller ⎯ 0 to 10 V Output Owner’s Manual
vi Siemens Building Technologies. Inc.
Getting Help
For more information about the Unit Vent Controller, contact your local Siemens Building
Technologies representative.
Where To Send Comments
Your feedback is important to us. If you have comments about this manual, please submit
them to [email protected]

Siemens Building Technologies, Inc. 1
1
Product Overview
Introduction
The Unit Vent Controller—0 to 10V Output is the Siemens Building Technologies, Inc.
Terminal Equipment Controller (TEC) used in unit ventilator applications. See Figure 1. It
provides Direct Digital Control (DDC) for five applications. The controller can operate as an
independent, stand-alone, DDC room controller or be networked with an APOGEE field
panel.
The controller provides all termination, input/output, system and local communication
connections. See Figure 1. The controller hardware consists of the controller with cover and
mounting bracket.
Table 1. Unit Vent Controller – 0 to 10 V Output Applications.
Standard Applications
2281 Heating and/or Chilled Water Cooling, ASHRAE Cycles l and II
2283 Heating and/or Chilled Water Cooling, ASHRAE Cycle III
2284 Heating and DX Cooling, ASHRAE Cycles I and II
2286 Heating and DX Cooling, ASHRAE Cycle III
2287 Nesbitt Cycle W
2299Slave Mode (no control; available for set up, and point extension device)
Ordering Notes
Unit Vent Controller – 0 to 10 Volt Output 540-509

APOGEE Unit Vent Controller ⎯ 0 to 10V Output Owner’s Manual
2 Siemens Building Technologies, Inc.
24V-AC LAN
TRUNK
COVER
BST
CH +-SRXTX RTS
DO 1 DO 2 DO 3 DO 4 DO 5 DO 6
NO C NO C NO C NO C NO C NO C DO 7 NO C DO 8 NO C DI 3 DI 2 AI 3 + -
AO 1DI 4 + -
AO 2 + - AO 3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
CONTROLLER
BOARD
POWER
TRUNK
TERMINATIONS TRANSMIT LED
RECEIVE LED BST LED
LAN
TRUNK
TERMINATIONS
INPUT / OUTPUTTERMINATIONS
DO LEDS
MOUNTING
HOLE
(2)
MOUNTING
RAIL
ROOMTEMPERATURE
SENSOR / MMI PORT
TEC0197R3
CH +-S
Figure 1. Unit Vent Controller - 0 to 10V Output.
Hardware Inputs
Analog
•Averaging air temperature sensor
•Room temperature sensor
•Room temperature setpoint dial (optional)
Digital
•Low Temperature Detection Thermostat (LTDT)
•Night mode override (optional)
•Wall switch (optional)

Introduction
Siemens Building Technologies, Inc. 3
Hardware Outputs
Analog (0 to 10V) Application
•Cooling valve actuator 2281, 2283, 2287
•Face-bypass damper actuator 2281, 2283, 2284, 2286
•Heating valve actuator 2281, 2283, 2284, 2286, 2287
•Outdoor air damper actuator 2281, 2283, 2284, 2286
Digital Application
•Auxiliary radiation electric coil contact; or,
auxiliary radiation two-position valve actuator 2281, 2283, 2284, 2286
•Unit fan 2281, 2283, 2284, 2286, 2287
•First stage electric heat 2281, 2283, 2284, 2286
•Second stage electric heat 2281, 2283, 2284, 2286
•Third stage electric heat 2281, 2283, 2284, 2286
•Two-position cooling valve actuator 2281, 2283, 2284, 2286
•Two-position heating valve actuator 2281, 2283, 2284, 2286
•DX coil 2284, 2286, 2287
Power Wiring
The controller is powered by 24 Vac and 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 (Figure 2).
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) (Figure 3).

APOGEE Unit Vent Controller ⎯ 0 to 10V Output Owner’s Manual
4 Siemens Building Technologies, Inc.
24V-AC
CEH
DO 1 DO 2 DO 3 DO 4 DO 5
NO C NO C NO C NO C NO C NO
1 2 3 4 5 6 7 8 9 10 11 12
1 2 3 4 5 6 7 8 9 10 11 1
COMMON
24VAC HOT
CONTROLLER POWER WIRING
NOTE: NO EARTH GROUND CONNECTION
TEC0253R2
FLN TRUNK
+-
S
(SHIELD) (SHIELD)
(+)
(+)
(-) (-)
TEC0470R1
Figure 2. Power Wiring. Figure 3. Communication Wiring.
Controller LED Indicators
The controller has eleven Light Emitting Diode (LED) indicators. See Figure 1. Table 2 lists
the type, the abbreviation on the controller, and the indication of each LED.
Table 2. Controller LEDS.
LED Type Label
(if present)* LED Number Indication
DO LED 1 to
LED 8 1 to 8 Indicates the ON/OFF status of the DO associated with it. A glowing LED
indicates that the DO is energized.
Receive RX 9 Indicates, when flashing, that the controller is
receiving information from the field panel.
Transmit TX 10 Indicates, when flashing, that the controller is
transmitting information to the field panel.
Basic Sanity Test BST 11 Indicates, when flashing ON and OFF once
per second, that the controller is functioning
property.
*Some LED labels and numerals may be hidden by the controller cover.
Temperature Sensors
Temperature sensors used with the Unit Vent Controller—0 to 10V Output include an
electronic room, mixed air or discharge air temperature sensor.
Room Temperature Sensor
The Terminal Equipment Controller room temperature sensor connects to the controller by
means of a cable pre-terminated at both ends with a 6-conductor RJ-11 plug-in connector.
See Figure 1 for the location of the room temperature sensor/Man-Machine Interface (MMI)
port.

Introduction
Siemens Building Technologies, Inc. 5
Mixed Air/Discharge Air Temperature Sensor
The mixed air/discharge air temperature sensor is a 100K ohm thermistor that connects to
the controller at the screw terminals for Al 3.
For more information about Siemens Building Technologies, Inc. temperature sensors,
contact your local Siemens Building Technologies, Inc. representative.
Actuators
Damper Actuators
The damper actuator used with the Unit Vent Controller—0 to 10V Output is a 0 to 10V spring
return electronic damper motor that positions an outside air damper. A 0 to 10V electronic
damper motor can be used to position a face-and-bypass damper.
Valve Actuators
The valve actuators used with the Unit Vent Controller—0 to 10V Output are modulating
spring return and non-spring return electronic valve motors that position the valves.
Related Equipment
•Relay Module
•Damper Actuator(s)
•Valve Actuator(s)
•Mixed Air/Discharge Air Temperature Sensor (optional)
•TEC Room Temperature Sensor
Contact your local Siemens Building Technologies, Inc. representative for product numbers
and more information.

6 Siemens Building Technologies,Inc.
2
Applications
Basic Operation
The Unit Vent Controller⎯0 to 10V Output provides Direct Digital Control (DDC) technology
for unit ventilator applications. The applications available in this controller are as follows:
•Heating and/or Chilled Water Cooling,
ASHRAE Cycles l and II
Application 2281
•Heating and/or Chilled Water Cooling,
ASHRAE Cycle III
Application 2283
•Heating and DX Cooling,
ASHRAE Cycles I and II
Application 2284
•Heating and DX Cooling,
ASHRAE Cycle III
Application 2286
•Nesbitt Cycle W Application 2287
•Slave Mode (no control; available for set up,
and point extension device)
Application 2299
Control Temperature Setpoints
The controller maintains a specified temperature setpoint based on Day/Night mode, 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.
Day Heating Operation
The controller maintains the room temperature by resetting the unit ventilator's discharge
temperature setpoint (2281/2284), modulating the available coil control device, controlling
auxiliary radiation (if provided), positioning the outdoor air or face-bypass damper.

Basic Operation
Siemens Building Technologies, Inc. 7
Day Cooling Operation
The controller maintains the room temperature by resetting the unit ventilator's discharge
temperature setpoint (2281), running the face-bypass damper at full all the time, modulating
or cycling the available coil control device (DX coil – 2284) or positioning the outdoor air
damper.
Night Heating Operation
The controller maintains the room temperature turning the fan and heating on and off as
required.
Night Cooling Operation
The controller maintains the room temperature by turning the fan and cooling on and off as
required.
Night Mode Override Switch
If the RTS has an override switch, it can be used to command the controller into day mode
for an adjustable amount of time. This only affects a controller in night mode.
Valve Configuration
2-Pipe Heating/Cooling – units with one valve, controlling a coil that may have hot water or
chilled water (depending on the season).
4-Pipe Heating or Cooling – units that are heating or cooling only, units with a heating and a
cooling coil, units with electric heating, etc.
Heating and Cooling Switchover
NOTE: For 2-pipe heating/cooling (Application 2281 and 2283), a field panel must
control the switchover between heating and cooling.
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).
Control Loops
Room Loop – uses the control setpoint and room temperature to set the discharge setpoint
between the minimum and maximum discharge temperature (2281, 2284).
Heating Loop –maintains room temperature setpoint by turning valves and/or electric heat
stages on and off.

APOGEE Unit Vent Controller ⎯ 0 to 10 V Output Owner’s Manual
8 Siemens Building Technologies. Inc.
Cooling Loop – maintains room temperature setpoint by turning valves on and off and using
free cooling (mixed air control) when available.
Auxiliary Loop – modulates the auxiliary loop using the auxiliary setpoint and discharge
setpoint (2284).
Mixed Air Loop – modulates the mixed air loop using the mixed air setpoint and mixed air
temperature (2283).
DX Loop – modulates the cooling loop using the control setpoint and room temperature
(2284).
Morning Warm-up/Cool-down
Morning warm-up or cool-down occurs after the controller switches from night mode to day
mode, upon power-up, or if the controller is reset. During morning warm-up or cool-down, the
controller provides maximum heating or cooling with the outdoor air damper closed until the
temperature of the space reaches setpoint.
ON/OFF Coil Valve Control
When a face-bypass configuration is used, the coils may be turned on and off with two-
position valves using DOs.
Electric Heat
If electric heat is used, it is controlled as follows:
HTG OUTPUT
(Point 60) Stage 1 Stage 2 Stage 3
0% to 33% ON OFF OFF
34% to 66% ON ON OFF
67% to 100% ON ON ON
In addition, no stage may turn on or off until the time delay has elapsed. Stage one will
always be the first stage to turn on and the last stage to turn off.
Fan Operation
Day Mode – The fan is on all the time.
Night Mode – The fan only operates when required for heating or cooling.
Fail-safe Operation
A low temperature detection thermostat (LTDT) can be used to signal the controller when the
temperature drops below the low temperature limit.

Basic Operation
Siemens Building Technologies, Inc. 9
If the room temperature sensor input to the Unit Vent Controller fails or the LTDT equals ON,
the controller goes through the following shutdown sequence:
•Outdoor air damper is closed.
•Heating is full ON (except electric, which is OFF).
•Cooling is full OFF.
•Face-bypass damper is open to face.
•Fan is OFF.
•Auxiliary radiation is OFF.
•Two-position heating valve actuator is open.
•Two -position cooling valve actuator is closed.
NOTE: DO 2 is not commanded by the fail-safe mode; all other DOs can be affected.
If the discharge air temperature sensor fails, the following conditions occur:
•If the last valid value is greater than 150 degrees, the heat is turned off, the outdoor
air damper is closed and the fan is turned on.
•If the sensor does not come back within 10 minutes or if the last valid value is less
than 150 degrees, the controller shuts down.
If a failed sensor returns or if the LTDT turns off, normal control resumes.
Analog and digital outputs cannot be commanded when the controller is in fail-safe mode;
however, failed points may be overridden, allowing the controller to return from fail-safe
mode. In this instance, room temperature control is not possible.

APOGEE Unit Vent Controller ⎯ 0 to 10 V Output Owner’s Manual
10 Siemens Building Technologies. Inc.
Application 2281 – Heating and/or Chilled Water
Cooling, ASHRAE Cycles I and II
In Application 2281, the Unit Vent Controller⎯0 to 10V Output controls a unit ventilator
equipped with a chilled water coil for cooling, and/or a heating coil, which may be hot water,
steam, or electric, for ASHRAE Cycles I and II. A face-bypass damper can be controlled,
replacing both the modulating (0-10V) heating and cooling actuators. If a face-bypass
damper is used, the two-position valves on the coils can be controlled. Heating only and
cooling only units can also be controlled with this application by overriding HEAT.COOL
(Point 5).
Other features available in this application include morning warm-up/cool down, night mode
override, free cooling and auxiliary radiation in heating mode.
NOTE: The use of a low temperature detection thermostat (LTDT) is strongly
recommended for hot water and steam systems.
This application controls room temperature by resetting the discharge air temperature. It also
controls an outdoor air damper according to the schedules as defined by ASHRAE Cycles I
and II. The free-cooling/economizer function is turned on and off by the field panel using
FREE CLG (Point 23). If free cooling is not available, the outdoor air damper will be kept at
minimum position; otherwise, the outdoor air damper will modulate open in sequence with the
heating and cooling actuators. The unit ventilator fan is also controlled in this application.
Figure 4. Application 2281 Control Drawing.