Johnson Controls TEC2604-4, TEC2604-4+PIR Installation Instructions Manual

TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked
Multi-Stage Economizer Thermostat Controllers

Installation Instructions

TEC2604-4 and TEC2604-4+PIR

Part No. 24-9890-1079, Rev. B

Issued June 22, 2010

Supersedes January 27, 20

10

Applications

The TEC2604-4 and TEC2604-4+PIR Thermostat
Controllers are BACnet® Master-Slave/
Token-Passing (MS/TP) networked devices that
provide control of single- or multi-stage unitary rooftop
units with economizers. The TEC2604-4+PIR
Thermostat Controller provides advanced active
occupancy logic that automatically switches occupancy
from Occupied to Unoccupied as required by the
presence of local activity. See the Occupancy Sensor
Operation – TEC2604-4+PIR Thermostat Controller
section for more information.

The technologically advanced TEC2604-4 and
TEC2604-4+PIR Thermostat Controllers feature a
Building Automation System (BAS) BACnet MS/TP
communication capability that enables remote
monitoring and programming for efficient space
temperature control.

The TEC2604-4 and TEC2604-4+PIR Thermostat
Controllers feature an intuitive user interface with
backlit display that makes setup and operation quick
and easy. The thermostat controllers also employ a
unique, Proportional-Integral (PI) time-proportioning
algorithm that virtually eliminates temperature offset
associated with traditional, differential-based
thermostat controllers. Economizer functions include a
0 to 10 VDC control signal, dry bulb changeover
strategy, adjustable minimum position, and mixed air
setpoint control.

IMPORTANT: The TEC2604-4 and
TEC2604-4+PIR Thermostat Controllers are
intended to provide an input to equipment under
normal operating conditions. Where failure or
malfunction of the thermostat could lead to persona l
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.

North American Emissions Compliance

United States

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.

Canada

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.

Installation

Location Considerations

Locate the TEC2604-4 or TEC2604-4+PIR Thermost at
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

For integrated Passive Infrared (PIR) models, be sure
that the thermostat controller is located centrally , where
occupant movement is frequent.

TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked

Multi-Stage Economizer Thermostat Controllers Installation Instructions

1

Note: Allow for vertical air circulation to the

Figure 1: Removing the Thermostat Controller

Cover (TEC2604-4+PIR Model Shown)

FIG:cvr_ rmvl

Figure 2: Opening the Thermost a t Contro ller PCB

Tabs

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TEC2604-4 or TEC2604-4+PIR Thermostat Controller.
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.

3. Carefully pull the locking tabs on the right side of
the thermostat controller mounting base and
unlock the PCB. Open the PCB to the left as
illustrated in Figure 2.

PCB
Locking

2. Pull the bottom edge of the thermostat controller
cover and open the thermostat controller as
illustrated in Figure 1.

Note: PIR Models have a wiring connection
between the cover and the Printed Circuit Board
(PCB). This connection allows for proper wiring of
the occupancy sensor. Carefully remove the wiring
connection from the PCB by pulling up on the
connector block. Do not attempt to remove the
connector block by pulling on the wires.

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:

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.

TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat

2

Controllers Installation Instructions

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

Figure 3: Securing the Thermostat Controller

Mounting Base to the Wall

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Figure 4: Removing the Screw Terminal Blocks

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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.

Wiring

When an existing thermostat controller is replaced,
remove and label the wires to identify the terminal
functions. When a TEC2604-4 or TEC2604-4+PIR
Thermostat Controller is replaced, simply remove the
old screw terminal blocks and reinsert them onto the
PCB of the replacement thermostat controller.

IMPORTANT: Because some of the objects may
not directly correlate to a previous version
(TEC26xx-2), you must rediscover all point objects
for the TEC2604-4 or TEC2604-4+PIR version. For
detailed information on this mapping, refer to the

TEC BACnet® MS/TP Network Series Thermostat
Controllers Technical Bulletin (LIT-12011592).

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 TEC2604-4 or TEC2604-4+PIR Thermostat
Controller.

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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 screw
terminals, make sure to properly twist the wires
together prior to inserting them into the screw
terminals.

Note: For more details on wiring the
MS/TP Communications Bus, refer to the

MS/TP Communications Bus Technical Bulletin
(LIT-12011034).

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.

TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat

3. Reinsert the screw terminal blocks onto the PCB.

3

Controllers Installation Instructions

4. Reattach the thermostat contro ller cover to the

Figure 5: Wiring the TEC2604-4 or TEC2604-4+PIR Thermostat Controller

24 VAC

Thermostat Power

Y2 Y1

RC C

If using the same power source
install a jumper across RC and RH.

Heat 1

Heat 2

RH W1 W2

Cool 1

Energi zes on a Cal l for Fi r s t -Sta ge Cooling

24 VAC from Equipment Transformer
24 VAC (Co m m on) from Eq uipment Transformer
24 VAC for Heating Stages
Energi zes on a Cal l for Fi r s t -Sta ge Heating
Energ izes on a Call for Sec o nd-Sta ge Heati ng
Auxiliary Output
Configur able Digital Input 1
Configur able Digital Input 2
Remote R oom Sens or
Sensor C ommon
Auxiliary/Outdoor Air Sensor
Remote Monitoring Supply Temperature Sensor
0 to 10 VDC Economizer Actuator Output
MS/TP Bus

Function

Y1
Y2

G

RC

C
RH
W1
W2

Aux

DI1
DI2
RS

Scom

OS
MS
EC

+, -, REF

Terminal

RS

• Lighting

• On/Of f Actuation

• Exhaust Fan

Outdoor

Controller

EC

0 to 10

VDC

24 VAC

Common

Supply
Sensor

Cool 2

FIG:wrng

Y2

G

C

RS

Three-Pole
Right Top
Connector

Eight-Pole Bottom Connector

OS

-

+

EC

G

Fan

Room

mounting base (top side first).

5. Use a Phillips-head screwdriver to reinstall the
security screw on the bottom of the thermostat
controller cover.

Energ izes on a Call for Sec o nd-Sta ge Cooli n g
Energizes Fan in Accordance wi th th e Selected Fan Mode

Aux

Aux

DI1

Five-Pole
Left Top Con nec tor

Y1

REF

Aux

Aux Cont act (High Side Common)

DI2

Scom

Remote

RC

DI1 DI2

OS

Auxiliary/

RH W1 W2

Scom

+

Supervisory

Remote

Monitoring

MS

REF

-

for the thermostat and heating loads,

Connecting the MS/TP Bus

To connect the MS/TP Bus:

1. Set the MS/TP address of the TEC BACnet MS/TP
Network Series Thermostat Controller per the
engineering drawings and test for bus voltage,
polarity, and isolation prior to wiring the MS/TP
Bus. Use the Com addr parameter to set the MS/
TP address for the thermostat controller.

Note: The wiring rules for the MS/TP Bus differ
from the wiring rules for the N2 Bus. For more
details on wiring the MS/TP Communications Bus,
refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034).

2. Observe the polarity when connecting the bus
wires to the thermostat controller.

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TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat
Controllers Installation Instructions

Air Sensor

Temperature

Sensor

3. After the bus wires are connected to the first
thermostat controller, continue in a daisy-chained
fashion to the next thermostat controller.

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).

The MS/TP Bus requires proper termination and

Figure 6: Front Cover of Thermostat Controller (TEC2604-4+PIR Model Shown)

70.0ºF

Backlit, plain text

Liquid Crystal Display (LCD)

is easy to read in any condition.

Five keys on the thermostat contr oller
make ope ra t ion easy and i nt uitive.

indicate system activi ty.

FIG:frnt_v w

PIR motio n de te ct or

saves ene r gy using

standby setpoints.

biasing at each end of a segment (a segment is a
physically continuous length of wire). Because the
rooftop controller is not equipped with end-of-line
termination, a Johnson Controls MS-BACEOL-0 End­of-Line Terminator (see Table 3; ordered separately) or
similar device is recommended to provide this end-of­line termination. An end-of-line terminator is required if
a supervisory controller is not at the end of the
segment. If a supervisory controller is at the end of the
segment, then the end-of-line terminator switch on the
supervisory controller must be set in the ON position.

The thermostat controller has automatic baud rate
detection. Do not exceed the maximum number of
devices allowed on a field bus. Be sure that the wiring
terminations are set correctly and that all
communication wiring is daisy-chained with no taps.

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.

Setup and Adjustments

The following blink codes may be seen:

• 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.

MS/TP Thermostat Controller Mapping

For detailed information on MS/TP Bus objects and
thermostat controller mapping, refer to the TEC

BACnet MS/TP Network Series Thermostat Controllers
Technical Bulletin (LIT-12011592).

Thermostat Controller User Interface Keys

The TEC2604-4 and TEC2604-4+PIR Thermost at
Controller user interface consists of five keys on the
front cover (Figure 6). The function of each key is as
follows:

•Use the YES key to:

- confirm menu selections and to advance to the
next menu item

TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat

Room Temp

Light-Emitting Diodes (LEDs)

- stop the Status Display Menu from scrolling
and to manually scroll to the next parameter on
the menu

Note: When the thermostat controller is left
unattended for 45 seconds, the thermostat
controller display resumes scrolling.

•Use the NO key to decline a parameter change and
to advance to the next menu item.

5

Controllers Installation Instructions

•Use the MENU key to:

- access the Main User Menu or to exit the menu
(See the Main User Menu

- access the Installer Configuration Menu or to
exit the menu (See the Configuring the

TEC2604-4 or TEC2604-4+PIR Thermostat
Controller section.)

•Use the UP/DOWN arrow keys to change the
configuration parameters and to activate a setpoint
adjustment.

section.)

Backlit Liquid Crystal Display (LCD)

The TEC2604-4 and TEC2604-4+PIR Thermostat
Controllers include 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.

Integrated PIR Sensor –
TEC2604-4+PIR Thermostat Controller

The integrated PIR sensor allows for automatic
switching between fully adjustable Occupied and
Unoccupied temperature setpoints without user
interaction. This feature generates inc rem en tal energ y
savings during scheduled occupied period s while the
space is unoccupied.

Programming Overview

Three menus are used to view, program, and configure
the TEC2604-4 and TEC2604-4+PIR Thermostat
Controllers: the Status Display Menu, the Main User
Menu, and the Installer Configuration Menu.

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

• Schedule Status
(Occupied/Unoccupied/Override [PIR Models])

• 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: Press the YES key to temporarily stop this
menu from scrolling.

Note: An option is available within the Installer
Configuration Menu to lock out the scrolling display and
show only the Room Temperature parameter.

Main User Menu

The Main User Menu is used to access and change the
basic operating parameters of the thermost at controller .
During normal thermostat controller operation, press
the MENU key once to access the Main User Menu.
This menu is most commonly used by the zone
occupant, and includes the following parameters:

• Temperature Setpoints

• System Mode

• Fan Mode

The Main User Menu uses Auto Help. Auto Help is
displayed automatically in the main User Menu when
there is 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.

Occupancy Sensor Operation –
TEC2604-4+PIR Thermostat Controller

A TEC2604-4+PIR Thermostat Controller (or a
TEC2604-4 Thermostat Controller equipped with a PIR
accessory cover) provides advanced occupancy logic.

Note: The PIR strategy is an occupied strategy. If the
thermostat controller is programmed to be Unoccupied ,
the PIR function does not have an effect on the
occupancy strategy.

The thermostat controller automatically switches the
occupancy level between Occupied and Unoccupied as
required, when local movement is sensed. In the
Occupied mode, if no movement is detected beyond
the Unocc TM parameter setting, the mode changes to
Unoccupied. Once movement is detected, the mode
changes back to Occupied.

Occupancy sensing is enabled only if a PIR cover is
installed. The PIR cover, when installed, is auto
detected.

TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat

6

Controllers Installation Instructions