Johnson Controls Unitary Products YCCS TEC2603-4 BACnet User manual

676292-YIM-A-0111
YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 1
Applications
The TEC2603-4 Thermostat Controller is a BACnet®
Master-Slave/Token-Passing (MS/TP) networked
device that provides control of multi-stage heating/
cooling equipment in York Commercial Comfort System
(YCCS) applications.
The TEC2603-4 Thermostat Controller features an
intuitive User Interface (UI) with backlit display that
makes setup quick and easy. The thermostat controller
also employs a unique, Proportional-Integral (PI)
time-proportioning algorithm that virtually eliminates
temperature offset associated with traditional,
differential-based thermostat controllers.
North American Emissions Compliance
United States
Canada
Mounting
Location Considerations
Locate the TEC2603-4 Thermostat Controller:
• on a partitioning wall, approximately 5 ft (1.5 m)
above the floor in a location of average
temperature
• away from direct sunlight, radiant heat, outside
walls, outside doors, air discharge grills, or
stairwells, and from behind doors
• away from steam or water pipes, warm air stacks,
unconditioned areas (not heated or cooled), or
sources of electrical interference
Note: Allow for vertical air circulation to the
TEC2603-4 Thermostat Controller.
Installation
To install the thermostat controller:
1. Use a Phillips-head screwdriver to remove the
security screw if it is installed on the bottom of the
thermostat controller cover.
Note: Normally, the security screw is packaged
separately in a plastic bag with the thermostat
controller. Skip this step if the screw is not installed
on the bottom of the cover.
2. Pull the bottom edge of the thermostat controller
cover and open the thermostat controller as
illustrated in Figure 1.
IMPORTANT: The TEC2603-4 Thermostat
Controller is intended to provide an input to
equipment under normal operating conditions.
Where failure or malfunction of the thermostat
controller could lead to personal injury or property
damage to the controlled equipment or other
property, additional precautions must be designed
into the control system. Incorporate and maintain
other devices, such as supervisory or alarm systems
or safety or limit controls, intended to warn of or
protect against failure or malfunction of the
thermostat controller.
This equipment 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 harmful interference when this equipment is
operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area is
likely to cause harmful interference, in which case
the user will be required to correct the interference
at his/her own expense.
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage
Thermostat Controllers
Installation Instructions
TEC2603-4

676292-YIM-A-0111
YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions2
3. Carefully pull the locking tabs on the right side of
the thermostat controller mounting base and
unlock the Printed Circuit Board (PCB). Open the
PCB to the left as illustrated in Figure 2.
4. Pull approximately 6 in. (152 mm) of wire from the
wall and insert the wire through the hole in the
thermostat controller mounting base.
5. Align the thermostat controller mounting base on
the wall and use the base as a template to mark
the two mounting hole locations.
6. Position the thermostat controller mounting base
so that the arrow on the base points upward to
indicate the top of the thermostat controller.
Note: If you need to install the thermostat on an
electrical junction box, use 2-1/2 x 4 in.
(63 x 101 mm) square boxes with mud ring covers,
and avoid smaller 1-1/2 x 4 in. (38 x 101 mm)
square or 3 x 2 in. (76 x 51 mm) boxes. This
procedure ensures you have enough space for
cabling and end-of-line devices, if needed.
Note: For surface-mount applications, use
durable mounting hardware such as Molly bolt
anchors that cannot be easily pulled out of the
mounting surface.
7. Secure the base to the wall surface using two
mounting screws as illustrated in Figure 3.
Note: Be careful not to overtighten the mounting
screws.
8. Swing the PCB back to the right and carefully snap
it into the locking tabs on the thermostat controller
mounting base.
9. Remove the screw terminal blocks that are
attached to a disposable adhesive. Figure 4
illustrates the locations of the screw terminal
blocks on the thermostat controller.
FIG:cvr_rmvl
Figure 1: Removing the
Thermostat Controller Cover
Figure 2: Opening the Thermostat Controller PCB
PCB
Locking
Tabs
FIG
:prntd_crct_brd
Figure 3: Securing the Thermostat Controller
Mounting Base to the Wall
FIG:mntng_bs
Figure 4: Removing the Screw Terminal Blocks
FIG:trmnl_blcks

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 3
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Wiring
When an existing thermostat controller is replaced,
remove and label the wires to identify the terminal
functions. When a TEC2603-4 Thermostat Controller is
replaced, simply remove the old screw terminal blocks
and reinsert them onto the PCB of the replacement
thermostat controller.
To wire the thermostat controller:
1. Strip the ends of each wire 1/4 in. (6 mm) and
connect them to the appropriate screw terminals as
indicated in Figure 5.
Note: If multiple wires are inserted into the
terminals, be sure to properly twist the wires
together prior to inserting them into the terminal
connectors.
2. Carefully push any excess wire back into the wall.
Note: Seal the hole in the wall with fireproof
material to prevent drafts from affecting the
ambient temperature readings.
3. Reinsert the screw terminal blocks onto the PCB.
4. Reattach the thermostat controller cover to the
mounting base (top side first).
5. Use a Phillips-head screwdriver to reinstall the
security screw on the bottom of the thermostat
controller cover.
Connecting the YCCS System Bus
To connect the YCCS System Bus:
1. Set the YCCS System Bus address of the
thermostat controller per the engineering drawings
and test for bus voltage and polarity prior to wiring
the YCCS System Bus. Use the Com addr
parameter to set the system bus address for the
thermostat controller.
2. Observe the polarity when connecting the bus
wires to the thermostat controller.
3. After the bus wires are connected to the first
thermostat controller, continue in a daisy-chained
fashion to the next YCCS System Bus device.
Note: The bus wiring must be twisted-pair lines.
Do not run the bus wiring in the same conduit as
line voltage wiring (30 VAC or above) or other
wiring that switches power to highly inductive loads
(such as contactors, coils, motors, or generators).
System Communication RS-485 serial protocol Bus
segments requires proper End-of-Line (EOL)
termination to reduce interference from signal bounce
back on the Bus segment. The system requires at least
one termination at either end of the Bus segment. The
System Manager ships with the EOL switch in the
factory default, ON (up) position. Ensure that this
device is EOL on one end of the System Bus segment.
See the End-of-Line (EOL) Terminations section for
more information.
The thermostat controller has automatic baud rate
detection. Do not exceed the maximum number of
devices allowed on a YCCS System bus (38 devices
total, including up to 24 TEC Series thermostat
controllers).
Be sure that the wiring terminations are set correctly
and that all communication wiring is daisy-chained with
no taps. See the Troubleshooting section for
information on correcting physical bus problems.
Figure 5 shows TEC2603-4 Thermostat Controller
wiring; see Figure 6 for a YCCS communication riser.
!
CAUTION: Risk of Electric Shock.
Disconnect the power supply before
making electrical connections to avoid
electric shock.
!
CAUTION: Risk of Property Damage.
Do not apply power to the system before
checking all wiring connections. Short
circuited or improperly connected wires
may result in permanent damage to the
equipment.
IMPORTANT: Make all wiring connections in
accordance with local, national, and regional
regulations. Do not exceed the electrical ratings of
the TEC2603-4 Thermostat Controller.

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YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions4
Figure 5: Wiring the TEC2603-4 Thermostat Controller
FIG:wrng
24 VAC
Thermostat Power
Y2 Y1 RC C
If using the same power source
for the thermostat and heating loads,
install a jumper across RC and RH.
Heat 1 Heat 2
RH W1 W2 Aux
Aux
Cool 1
Energizes on a Call for First-Stage Cooling
Energizes on a Call for Second-Stage Cooling
Energizes Fan inAccordance with the Selected Fan Mode
24 VAC from Equipment Transformer
24 VAC (Common) from Equipment Transformer
24 VAC for Heating Stages
Energizes on a Call for First-Stage Heating
Energizes on a Call for Second-Stage Heating
Auxiliary Output
Digital Input 1 (Filter Only)
Digital Input 2 (Disabled)
Remote Room Sensor
Sensor Common
Auxiliary/Outdoor Air Sensor
Remote Monitoring Supply Temperature Sensor
CCS System Bus
Function
Y1
Y2
G
RC
C
RH
W1
W2
Aux
DI1
DI2
RS
Scom
OS
MS
+, -, REF
Terminal
DI2
DI1
Remote
Monitoring
Supply
Temperature
Sensor
Auxiliary/
Outdoor
Air Sensor
-
+
REF
Supervisory
Controller
Cool 2
Y2 Y1 G RC C
RH
W1
W2
DI1
DI2
RS
Scom
Five-Pole
Left Top Connector
Three-Pole
Right Top
Connector
Seven-Pole Bottom Connector
REF
-
+
MS
OS
Aux
G
Fan
Scom
RS
MS
OS
Aux Contact (High Side Common)
• Lighting
• On/Off Actuation
• Exhaust Fan
Remote
Room
Sensor

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 5
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S1 S2
J8 J7 J6
System
Bus Zone
Bus
COM -+COM -+
COM 24V
On
Off
24VA C
COM
COM
SB -
SB +
ZB +
ZB -
COM
EOL
ON
Off
EOL
ON
S1 S2
J8 J7 J6
System
Bus
Zone
Bus
COM -+COM -+
COM 24V
On
Off
24VA C
COM
COM
SB -
SB +
ZB +
ZB -
COM
EOL
ON
Off
EOL
ON
Communication
Connector
Inpu t
Terminals
Address
Switch
AI1 COM
J5
AI2 COM
J6
AI3 COM
J7
AI4 COM
J8
AI5 COM
J9
O N
1
64
32
16
8
4
2
128
COM
-
+
J3
Communicatio n
Conn ector
Input
Terminals
Address
Switch
AI1 COM
J5
AI2 COM
J6
AI3 COM
J7
AI4 COM
J8
AI5 COM
J9
O N
1
64
32
16
8
4
2
128
COM
-
+
J3
Drain
Wire
Valid Address
Range = 18-41
Address = 4 to 7
COM
-
+
J2
COM
AI1
AI2
COM
AI3
AI4
1
64 32 16
8
4
2
128
O
N
24VCOM24VCO M
COM
-
+
J2
COM
AI1
AI2
COM
AI3
AI4
1
64 32 16
8 4 2
128
O
N
24VCOM24VCO M
Drain
Wire
Drain
Wire
Tape back
Drain Wire
Drain
Wire
Address = 4
Address = 6
Address = 7
VAV
Rooftop Unit
VAV
Box
VAV
Box
Single Zone
Unit
IOM Module
Zone Coordinator
Termination Board
Tape back
Drain Wire
System Manager
Termination Board
Zone Bus
Communication
Trunk
System Bus
Communication
Trunk
TEC2601-4, TEC2602-4, TEC2603-4
Address = 42 to 65
Drain
Wire
Address = 18 to 41
Universal RTU Controller
LC-PEC1001-0
VAV Valid
Address Range =
6-37
Note: Ground the drain wire at
the end of the communication
trunk. Do not allow the drain
wire to contact exposed metal.
Note: Communication trunk must be
22 AWG (0.65 mm) 3-conductor
twisted, shielded cable with drain wire.
Note: Ground the drain wire at
the end of the communication
trunk. Do not allow the drain
wire to contact exposed metal.
O
N
+
COM
-
24V
COM
RTU
FIG:CCS_sys_rsr
Figure 6: System Communication Riser

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YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions6
End-of-Line (EOL) Terminations
Daisy-chained RS485 protocol networks require
End-of-Line (EOL) termination to reduce interference.
Interference is caused by signal reflection that occurs
when data transmissions reach the end of a bus
segment and bounce back (Figure 7). The high baud
rates on Master-Slave/Token-Passing (MS/TP) bus
applications require robust EOL termination and strict
adherence to the EOL termination rules.
On a YCCS System bus or Zone bus, only one EOL
termination is required due to the fewer number of
devices on one bus and the shorter wiring length.
Specifically, the System bus must always have a
System Manager as the EOL device, and the Zone bus
must always have a Zone Coordinator as the EOL
device. Figure 8 shows a YCCS EOL wiring example.
No EOL = No Signal Cushioning
(Bounce Back and Noise)
No
EOL
EOL
EOL Provides Signal
Cushioning (No Bounce Back)
FIG:intrfrnc
Figure 7: Interference
Figure 8: End-of-Line Wiring
Input
Output
Module
24V
COM
COM - +
BI-1
COM
BI-2
COM
AI-3
COM
AI-4
Monitored Contact
To Temperature,
RH%, CO2Sensor,
Building Pressure,
Light Sensor,
Refrigerant Sensor
To 24VAC
BO-3
BO-2
BO-1
BO-4
COM
Monitored Contact
To Scheduled Item 1
To Scheduled Item 2
To Scheduled Item 3
To Scheduled Item 4
Non-
CCS
HVAC
System
Universal
CV Unit
Controller
24V
COM
Zone Sensor
COM - +
AI-1
COM
AI-2
1 2 3 4
BO-1
BO-2
BO-3
BO-4
BO-5
C
R
G
Y1
Y2
W1
W2
COM
AI-6
COM
AI-7
COM
AI-8
COM
AI-4
COM
AI-5
COM
BI-2
SAT Sensor
RAT Sensor
OAT Sensor
To Zone RH% Sensor
To Zone CO2Sensor
APS
Zone Sensor COBP Zone Coordinator
System
Bus
COM SB- SB+
EOL
O
N
?
Zone
Bus
COM ZB- ZB+
EOL
O
N
?
COM
24V
LAN To 24VAC
System Manager
System
Bus
COM SB- SB+
EOL
O
N
Zone
Bus
COM ZB- ZB+
EOL
O
N
COM
24V
Modem
LAN To 24VAC
To Phone Line
To Ethernet Hub
VAV Zone Coordinator
System
Bus
COM SB- SB+
EOL
O
N
Zone
Bus
COM ZB- ZB+
EOL
O
N
COM
24V
LAN To 24VAC
tape
off
CV Unit Controller
COM - +
Simplicity Board
Binary
&
ModBus
This end of the Drain Wire
connected to cabinet ground
Other System Bus Devices
AI-1
COM
AI-2
1 2 3 4
Other System Bus Devices
Other System Bus Devices
To COBP Zone
Bus Devices
To VAV Zone
Bus Devices
Zone Coordinator must be end of line for zone busSystem Manager must be end of line for system bus
TEC2601-4
TEC2602-4
TEC2603-4
Y2
Y1
G
RC
C
RH
W1
W2
Aux
DI1
DI2
RS
Scom
OS
MS
+
_
Ref
COM - +
FIG:TEC_EOL

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 7
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Thermostat Controller Communication Modes
After connecting the thermostat controller to the system
bus, verify that the device is communicating correctly
on the bus segment.
A small green light under the thermostat controller
cover (on the left edge when facing the thermostat
controller) indicates the communications mode when
the thermostat controller is operating.
The following blink codes may appear:
•Short-Short-Long: Indicates that the baud rate is
known and that communication is active.
•Short-Short: Indicates that the thermostat
controller is scanning for the correct baud rate and
that there is no communication.
•Off: Indicates that there is no power to the
thermostat controller or that the MS/TP wiring
polarity is reversed.
•Long: Indicates that the MS/TP communication
daughter board is the wrong type for the main
board.
Setup and Adjustments
Thermostat Controller User Interface Keys
The TEC2603-4 Thermostat Controller User Interface
(UI) consists of five keys on the front cover (Figure 9).
The function of each key is as follows:
•UsetheYES key to:
- confirm menu selections and to advance to the
next menu item
- stop the Status Display Menu from scrolling
and to manually scroll to the next parameteron
the menu
Note: When the thermostat controller is left
unattended for 45 seconds, the thermostat
controller display resumes scrolling.
•UsetheNO key to decline a parameter change and
to advance to the next menu item.
•UsetheMENU key to:
- access the Main User Menu or toexit the menu
(see the Main User Menu section)
- access the Installer Configuration Menu or to
exit the menu (see the Configuring the
TEC2603-4 Thermostat Controller at the Local
Display section.
•UsetheUP/DOWN arrow keys to change the
configuration parameters and to activate a setpoint
adjustment.
Backlit Liquid Crystal Display (LCD)
The TEC2603-4 Thermostat Controller includes a
2-line, 8-character backlit display. Low-level
backlighting is present during normal operation, and it
brightens when any user interface key is pressed. The
backlight returns to low level when the thermostat
controller is left unattended for 45 seconds.
Light-Emitting Diodes (LEDs)
Three LEDs are included to indicate the fan status, call
for heat, or call for cooling:
• The fan LED is on when the fan is on.
• The heat LED is on when heating is on.
• The cool LED is on when cooling is on.
Programming Overview
In addition to the YCCS System Manager, the Status
Display Menu, the Main User Menu, and the Installer
Configuration Menu are used locally to view, program,
and configure the thermostat controller.
Status Display Menu
The Status Display Menu is displayed during normal
thermostat controller operation, and continuously
scrolls through the following parameters:
• Room Temperature
• System Mode
70.0ºF
Room Temp
Backlit, plain text
Liquid Crystal
Display (LCD) is
easy to read in
any condition.
Five keys on the thermostat controller
make operation easy and intuitive.
Light-Emitting
Diodes (LEDs)
indicate system
activity.
FIG:frnt_vw
Figure 9: Front Cover of Thermostat Controller

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YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions8
• Schedule Status (Occupied/Unoccupied)
• Outside Temperature – An outside air temperature
sensor must be installed and connected.
• Applicable Alarms – The backlight lights up as an
alarm condition is displayed.
Note: Frost and Fan Lock alarms may appear
locally at the thermostat controller. Filter alarms
appear both at the thermostat controller and at the
YCCS System Manager.
Note: Press the YES key to temporarily stop this menu
from scrolling.
Main User Menu
Use the Main User Menu to access and change the basic
operating parameters of the thermostat controller. Access
the menu by pressing the MENU key during normal
thermostat controller operation.
Note: Select parameters (such as setpoints) are set at
the System Manager (Table 1). Any value configured at
the thermostat controller is automatically overridden by
the value set at the System Manager.
The Main User Menu also includes Auto Help. Auto Help
appears automatically in the Main User Menu during a
pause in programming activity.
Installer Configuration Menu
Use the Installer Configuration Menu to set up the
thermostat controller for application-specific operation. To
access the menu, press and hold the MENU key for
approximately 8 seconds.
Configuring the TEC2603-4 Thermostat
Controller at the Local Display
The TEC2603-4 Thermostat Controller ships from the
factory with default settings for all configurable
parameters. Although all parameters shown in Table 2
appear at the thermostat controller, not all are
configurable at the thermostat controller. To reconfigure
the parameters set at the thermostat controller, follow the
steps in this section.
1. To access the Installer Configuration Menu, press
and hold the MENU key for approximately
8 seconds.
Note: If the Password parameter is configured,
Password 0 appears on the thermostat controller
display indicating that the configured password is
required to proceed. Use the UP/DOWN arrow keys
to enter the configured password, then press the
MENU key to proceed through the Installer
Configuration Menu parameters.
2. Once the Installer Configuration Menu begins,
release and press the NO key to scroll through the
parameters listed in Table 2.
3. When the desired parameter is displayed, use the
YES key to choose the desired selection option.
4. Press the YES key and then the NO key to continue
scrolling through the parameters.
When the thermostat controller is in the Installer
Configuration Menu and left unattended for
approximately 8 seconds, the thermostat controller
reverts to the Status Display Menu.
Configuring the Thermostat Controller at the
System Manager
The System Manager overrides select parameters
(including setpoints) set at the thermostat controller.
These parameters are shown in Table 1. Table 2 shows
all parameters which appear at the thermostat controller.
To access these parameters:
1. From the System Manager home screen,
press the setup icon (shown right). The
System Manager Setup screen appears.
2. Press Systems. The Systems screen
appears.
3. Select the TEC you want to configure. The TEC Zone
screen appears.
4. Press Setup. The TEC Zone Setup screen appears.
5. Select the parameter you want to configure.
6. Select the new value and press OK. Complete these
steps for all TECs on your System Bus.
You can change the name of the thermostat controller
and as it appears on your System Manager. Refer to the
York Commercial Comfort System (YCCS) System
Manager and Zone Coordinator User’s Guide (428516)
for more information.
Setting Heating and Cooling Setpoints
All setpoints are set at the YCCS System Manager.
Any setpoints created in the TEC2603-4 UI are
overridden by the setpoints created in the System
Manager.
Setting the Thermostat Controller Password
You may configure the thermostat controller password at
the thermostat controller; however, this value is
automatically overridden by the value entered at the
System Manager. By default, the System Manager
assigns all TEC260x-4 Series Thermostat Controllers on
the YCCS System Bus a password of 227.

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 9
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Follow these steps to change the password:
1. From the System Manager home screen, press the
Setup icon. The Setup screen appears.
2. Press System Manager. The System Manager
Setup screen appears.
3. Press Security (password). The Security
(Passwords Required) screen appears.
4. Press Change TEC Configuration Password. If you
are not logged on as the Administrator, you are
prompted for the Administrator password. After you
have entered this password, the Change TEC
Configuration Password appears.
5. Enter a new value between 1 and 1,000. You do
not need to enter 0s preceding any number less
than four digits.
6. Press OK. The new password is automatically
assigned to every TEC on the System bus.
Table 1: Parameters Set at System Manager1, 2
Parameter Description and Default Selection Options
System Mode Selects the operating status of the
Rooftop Unit (RTU).
Default: Auto
Cooling: RTU provides cooling.
Heating: RTU provides heating.
Off: No heating or cooling is provided.
Auto: RTU operates according to the user-set schedule
Setpoint
Deadband Sets the minimum deadband between the heating and cooling
setpoints.
Default: 2.0 Deg F (1.0 Deg C)
Options: 2.0 Deg F,3.0 Deg F, 4.0 Deg F
(1.0 Deg C, 1.5 Deg C, 2.0 Deg C)
Cooling Unocc
Setpoint Sets the unoccupied cooling setpoints.
Default: 78.0 Deg F (25.6 Deg C)
Range: 72.0 to 86.0 Deg F (22.2 to 30.0 Deg C)
Cooling Occ
Setpoint Sets the occupied cooling setpoints.
Default: 72.0 Deg F (22.2 Deg C) Range: 70.0 to 78.0 Deg F (21.1 to 25.6 Deg C)
Heating Occ
Setpoint Sets the occupied heating setpoints.
Default: 68.0 Deg F (20.0 Deg C)
Range: 62.0 to 70.0 Deg F (16.7 to 21.1 Deg C)
Heating Unocc
Setpoint Sets the unoccupied heating setpoints.
Default: 62.0 Deg F (16.7 Deg C)
Range: 55.0 to 68.0 Deg F (12.8 to 20.0 Deg C)
TEC Configuration
Password Sets the protective access password to prevent unauthorized
access to the Installer Configuration
Menu.
Default: 227
Range: 1to 1,000
See the Setting the Thermostat Controller Password section for
setup information.
Temporary
Occupancy Time Sets the duration of temporary occupancy time.
Default: 120 min
Range: 15 to 240 min
Display Units Sets the display units of
measurement.
Default: Deg F
Options: Deg C or Deg F
1. Default values and selection options are shown as they appear on screen. For example, °F at the System Manager appears
as Deg F.
2. The System Manager automatically overrides any values set locally at the thermostat controller every 15 minutes.

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YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions10
Table 2: Installer Configuration Menu (Part 1 of 3)
Parameter
Appearing
on Display1
Description and Default Selection Options
Com addr YCCS System Bus address of the
controller.
Default: 254
Range: 42 to 65
Pswrd Set at System Manager.
DI1 Set to Filter by System Manager.
(Value cannot be changed) (Filter): A Filter alarm is displayed. This alarm can be connected to a differential pressure switch that monitors a filter.
DI2 Disabled by System Manager.
MenuScro Gives the option of having the
display continuously scroll the
parameters.
Default: on
(off): The scroll is inactive.
(on): The scroll is active.
Lockout Disables access at TEC to scheduling, setpoints, and mode settings. Set by System Manager to No
Access (2). Value cannot be changed.
Pwr del2Sets the delay time period at
thermostat controller powerup, or
each time power is removed and
reapplied, before any operation
(fan, heating, or cooling) is
authorized. Also can be used to
sequence the startup of multiple
units in one location.
Default: 10.0 sec
Range: 10.0 to 120.0 sec
Frost pr Provides a minimum heating
setpoint of 42.0°F/5.5°C to prevent
freezing in the zone controlled by
the thermostat controller.
Default: off
(on): Enabled
(off): Disabled
Heat max Set at System Manager (Heating Occ Setpoint, Heating Unocc Setpoint).
Cool min Set at System Manager (Cooling Occ Setpoint, Cooling Unocc Setpoint).
Pband Proportional Band used by the PI
temperature control loop of the
thermostat controller.
Pband is not converted with C or F
scale and is always shown with a
range of 2 to 8.
Default: 2(2.0F°/1.1C°)
Value F Scale Pband/C Scale Pband
22.0F°/1.1C°
33.0F°/1.7C°
44.0F°/2.2C°
55.0F°/2.8C°
66.0F°/3.3C°
77.0F°/3.9C°
88.0F°/4.4C°
Note: The use of a larger proportional band is not to use the
thermostat controller as a discharge air controller device. The use of
a larger proportional band can be used to solve issues for flawed
HVAC design with basic sizing and thermostat controller location
errors that cannot be worked around.

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 11
676292-YIM-A-0111
Anticycl Anti-Short Cycle timer sets the
minimum on/off times for heating
and cooling.
Default: 2.0 min
Note: Set the anti-short cycle timer
to 0.0 min for equipment that
already has its own anti-short cycle
timer.
Range: 0.0 to 5.0 min adjustable in 1-minute increments
Heat cph Sets the maximum number of
Heating cycles per hour.
Default: 4.0
Range: 3.0 to 8.0 cycles per hour
Cool cph Sets the maximum number of
Cooling cycles per hour.
Default: 4.0
Range: 3.0 or 4.0 cycles per hour
Deadband Set at System Manager.
Fan cont Determines how the fan is activated
in response to a call for heating.
Default: on
Note: The Fan cont parameter
applies to W1 when the fan is in the
Auto mode only. The Fan cont
parameter does not affect fan
operation on a call for cooling (Y1).
(off): The thermostat controller does not activate the fan in
response to a call for heating. The fan is activated by the equipment
fan and limit control.
(on): Enables the thermostat controller to activate the fan in
response to a call for heating.
Fan del Fan delay extends fan operation
after a heating or cooling cycle has
ended.
Default: off
Note: The fan delay is only active
when the fan is in the Auto mode.
(on): Extends fan operation by 60 seconds after a heating or cooling
cycle has ended.
(off): No extension of fan operation after a heating or cooling cycle
has ended.
TOccTime Set at System Manager.
Cal RS Sets the desired room air
temperature sensor calibration
(offset). The offset can be added to
or subtracted from the actual
displayed room temperature.
Default: 0.0F°/0.0C°
Range: -5.0F°/-2.5C° to 5.0F°/2.5C° adjustable in 1.0F°/0.5C°
increments
Cal OS Sets the desired outside air
temperature sensor calibration
(offset). The offset can be added to
or subtracted from the actual
displayed room temperature.
Default: 0.0F°/0.0C°
Range: -5.0F°/-2.5C° to 5.0F°2.5C° adjustable in 1.0F°/0.5C°
increments
H stage Reverts the operation of a two-stage
thermostat controller to a
single-stage thermostat controller
when the second heating stage is
not needed.
Default: 2.0
(1.0): One Stage
(2.0): Two Stages
Table 2: Installer Configuration Menu (Part 2 of 3)
Parameter
Appearing
on Display1
Description and Default Selection Options

676292-YIM-A-0111
YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions12
Operation
Programming/Operating the TEC2603-4
Thermostat Controller
Once the thermostat controller is configured and
communicating to the System Manager, the System
Manager overrides select parameters set at the
thermostat controller. To ensure consistency across the
YCCS, the System Manager sends a message to the
thermostat controller with updated values every 15
minutes.
Troubleshooting
The following information provides information relative
to the TEC2603-4 Thermostat Controller and YCCS
System Communications Bus.
Status LEDs
The System Manager includes LEDs that indicate
communication and alarm status for the controller.
Table 3 lists LED descriptions.
C stage Reverts the operation of a two-stage
thermostat controller to a
single-stage thermostat controller
when the second cooling stage is
not needed.
Default: 2.0
(1.0): One Stage
(2.0): Two Stages
H lock Disables heating stage(s) operation
when the outside air temperature is
greater than the configured value. If
the fan mode is set to Auto or
Smart, the fan output is also
disabled. Requires that an outside
air temperature sensor be installed
and connected.
Default: 120°F/49°C
Range: -15°F/-26°C to 120°F/49°C adjustable in 5F°/5C° increments
C lock Disables cooling stage(s) operation
when the outside air temperature is
less than the configured value. If the
fan mode is set to Auto or Smart,
the fan output is also disabled.
Requires that an outside air
temperature sensor be installed and
connected.
Default: -40°F/-40°C
Range: -40°F/-40°C to 95°F/35°C adjustable in 5F°/5C° increments
Unocc TM Not Used.
Aux cont Energizes peripheral devices
(lighting equipment, exhaust fans,
and economizers).
Default: n.o.
Note: The contact toggles with the
internal Occupied/Unoccupied
schedule (or the Night Setback
[NSB] contact on one of the digital
inputs, if used).
(n.c.): Contact open = Occupied; contact closed = Unoccupied
(n.o.): Contact closed = Occupied; contact open = Unoccupied
1. Factory-set parameters appear on the display but cannot be edited by the user at the thermostat controller or System
Manager.
2. When adjusting the numeric value, press the UP/DOWN arrow key to change the value by single increments; press and
hold the UP/DOWN arrow key to change the numeric value in increments of ten.
Table 2: Installer Configuration Menu (Part 3 of 3)
Parameter
Appearing
on Display1
Description and Default Selection Options

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 13
676292-YIM-A-0111
YCCS System Communication Problems
Several factors may influence the behavior of the
System Communication Bus. In addition, certain
problems can affect the Bus in multiple ways and have
multiple symptoms, which makes the exact diagnosis
difficult. For example, duplicate addresses on the Bus
can degrade performance, make the device go offline,
or stop communication completely.
Incomplete Address
The TEC2603-4 Thermostat Controller must have the
address set between 42–65 on the System
Communication Bus; other settings prevent the
thermostat controller from communicating on the
System Communication Bus.
Duplicate Addresses
Two or more devices on a communication Bus cannot
have the same address. For example, two thermostat
controllers cannot both have an address of 42. If two
devices on the same Bus have the same address,
performance can degrade or serious communication
problems may occur. These problems include the
devices not coming online and all communication
stopping completely. Take care when adding or
changing devices that addresses are not duplicated.
Check for duplicate addresses, in the following ways,
depending on the severity of the situation:
• If the Bus performance is degraded, check the
address settings at the devices with unreliable
communications.
• If a specific device is not communicating, remove
the device with communication problems and
check if the device address remains online at the
System Manager.
• If the Bus communication problems are severe,
and no communication is present, or you cannot
determine where communication is unreliable,
partition (disconnect and isolate a portion of the
system Bus for testing purposes) and test the Bus
portion connected to the System Manager.
Correcting Physical Communication Bus Problems
The communication bus is subject to a number of
physical factors that can affect performance. Consider
the following list of common physical problems that
affect the communications bus:
• Check status LED to verify power at the controller
• Check wires
- Verify wire is 22 AWG (0.6 mm) 3-conductor,
twisted, shielded cable.
- Verify shield is continuous and hard-grounded
at one end.
• Check wiring
- Check for and eliminate T-Taps (wire
configurations that create a T shape) and star
configurations.
- Ensure bus is wired in daisy-chain fashion.
- Verify that appropriate devices have three
wires entering and exiting each terminal
(devices at the ends of the trunk do not have
this wiring).
• Check EOL switch settings
- Verify the System Bus EOL switch on the
System Manager is set to ON and the System
Manager is located at the end of the zone bus
trunk.
- Verify that only the EOL switch at the end of
the system bus is set to ON and all other
system bus EOL switches are set to OFF.
• Check connections, polarity, and lengths
- Verify communications loops are less than
approximately 304 m (1,000 ft) total in length.
- If you are using one transformer to power
multiple devices, verify the device 24 VAC
power connection follows the polarity of the
common and 24 V terminations.
• Check for opens and shorts
• Check terminations
• Check for sources of interference
Table 3: Status LEDs
LED Description
Green The controller is receiving power from the
24 VAC power supply; alarms are not present.
Red The controller is receiving power from the
24 VAC power supply; alarms are present.
Off Controller is not receiving 24 VAC power or the
controller is in startup mode.

676292-YIM-A-0111
YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions14
• Check bus voltages:
- (+) to COM must be within 2.0 to 3.0 VDC
- (-) to COM must be within 1.5 to 2.54 VDC
- (+) to (-) must be within 0.3 to 1.0 VDC
Note: Values may fluctuate due to ongoing
communications. This operation is normal provided
the voltage is within the defined range.
• Check addresses:
- Check for duplicate addresses.
- Verify the address range is sequential.
Correcting Thermostat Controller Problems
The TEC2603-4 Thermostat Controller may also have
problems specific to the device. Use Table 4 and
Table 5 as additional troubleshooting resources.
Table 4: Alarm Messages
Display Function
Frost Indicates that the heating is energized by the low limit frost protection room temperature setpoint 5.6°C (42°F).
Fan Lock Indicates that the heating and cooling action are locked out due to a defective fan operation.
Filter1Indicates that the filter(s) is dirty in accordance with the Digital Input.
1. This alarm also appears at the System Manager.
Table 5: Additional Thermostat Controller Troubleshooting Details1
Symptom Probable Causes
Multiple
Symptoms The baud rate may have been changed on some devices on the network but not all devices.
A download may be in progress.
There may be a fault at a device.
A repeater may be needed or may be configured incorrectly.
There may be a duplicate device object name or instance.
Poor Performance Excessive bus traffic may exist (bus overload).
The baud rate may be set too low.
There may be too many devices on the network.
There may be unaccounted devices on the network.
There may be unusually slow devices on the network or devices that are slow to respond.
Thermostat
Controller Goes
Offline
A power failure or other failure may have occurred at the thermostat.
Communication may have been disabled at the thermostat controller.
Thermostat
Controller Does
Not Come Online
A thermostat controller may be connected to the wrong bus.
A baud rate may be specified in the new thermostat controller that is incompatible with the running
network.
No device on the network is configured to use a specific baud rate, but all devices are set to use auto
baud. At least one device must have an assigned baud rate. Set the baud rate in the bus supervisor
and set all other devices to auto baud.
1. For common MS/TP troubleshooting information, refer to the MS/TP Communications Bus Technical Bulletin
(LIT-12011034).

YCCS TEC2603-4 BACnet® MS/TP Networked Multi-Stage Thermostat Controllers Installation Instructions 15
676292-YIM-A-0111
Accessories
All the accessories in Table 6 include mounting
hardware; contact the nearest Johnson Controls®
representative to order any of these parts.
Note: Review the technical specifications of the
optional accessories prior totheir use in an application.
Repair Information
If the TEC2603-4 Thermostat Controller fails to operate
within its specifications, replace the unit. For a
replacement thermostat controller, contact the nearest
Johnson Controls representative.
Table 6: Accessories (Order Separately)
Code
Number Description
SEN-600-1 Remote Indoor Air Temperature Sensor
TE-6361M-11Duct Mount Air Temperature Sensor
TE-6363P-11Outside Air Temperature Sensor
1. Refer to the TE-6300 Series Temperature Sensors
Product Bulletin (LIT-216320) for additional TE-636xx-x
Series 10k ohm Johnson Controls Type II Thermistor
Sensors.

676292-YIM-A-0111
Subject to change without notice. Printed in U.S.A. Ref: 12011647
Copyright © April 28, 2011 by Johnson Controls, Inc. All rights reserved. Supersedes: Nothing
Johnson Controls Unitary Products
5005 York Drive
Norman, OK 73069
Technical Specifications
TEC2603-4 Thermostat Controllers
Power Requirements 19 to 30 VAC, 50/60 Hz, 2 VA (Terminals RC and C) at 24 VAC Nominal, Class 2 or
Safety Extra-Low Voltage (SELV)
Relay Contact Rating (Y1, Y2, G, W1,
W2, and AUX) 19 to 30 VAC, 1.0 A Maximum, 15 mA Minimum, 3.0 A Inrush, Class 2 or SELV
Digital Inputs Voltage-Free Contacts across Terminal C to Terminals DI1 and DI2
Analog Inputs Resistive Inputs (RS and UI3) for 10k ohm Johnson Controls Type II Negative
Temperature Coefficient (NTC) Thermistor Sensors
Wire Size 18 AWG (1.0 mm Diameter) Maximum, 22 AWG (0.6 mm Diameter) Recommended
Temperature Sensor Type Local 10k ohm Johnson Controls Type II Negative Temperature Coefficient (NTC)
Thermistor Sensor
Temperature Range Backlit
Display -40.0°F/-40.0°C to 122.0°F/ 50.0°C in 0.5° Increments
Heating
Control 40.0°F/4.5°C to 90.0°F/32.0°C
Cooling
Control 54.0°F/12.0°C to 100.0°F/38.0°C
Accuracy Temperature ±0.9F°/±0.5C° at 70.0°F/21.0°C Typical Calibrated
Minimum Deadband 2F°/1C° between Heating and Cooling
Ambient Conditions Operating 32 to 122°F (0 to 50°C); 95% RH Maximum, Noncondensing
Storage -22 to 122°F (-30 to 50°C); 95% RH Maximum, Noncondensing
Compliance United States UL Listed, File E27734, CCN XAPX,
Under UL 873, Temperature Indicating and Regulating Equipment
FCC Compliant to CFR 47, Part 15, Subpart B, Class A
Canada UL Listed, File E27734, CCN XAPX7,
Under CAN/CSA C22.2 No. 24, Temperature Indicating and Regulating Equipment
Industry Canada, ICES-003
Europe CE Mark – Johnson Controls, Inc., declares that the BACnet Thermostats are
in compliance with the essential requirements and other relevant provisions of the
EMC Directive 2004/108/EC.
Australiaand
New Zealand C-Tick Mark, Australia/NZ Emissions Compliant
BACnet
International BACnet Testing Laboratories™ (BTL) 135-2001 Listed BACnet Application Specific Controller (B-ASC)
Shipping Weight 0.75 lb (0.34 kg)
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.