Johnson Controls TEC-2647-4 User manual

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two

Outputs Installation Instructions

Applications

The TEC26x7-4 Series Thermostat Controllers are

BACnet® Master-Slave/Token-Passing (MS/TP)

networked devices that provide control of local

hydronic reheat valves, pressure dependent Variable

Air Volume (VAV) equipment with or without local

reheat, or other zoning equipment using an on/off,

floating, or proportional 0 to 10 VDC control input. The

technologically advanced TEC26x7-4 Series

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 TEC26x7-4 Series 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.

North American Emissions Compliance

United States

Canada

Installation

Location Considerations

Locate the TEC26x7-4 Series 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, behind doors, air discharge grills, stairwells,

or outside 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

TEC26x7-4 Series Thermostat Controller.

IMPORTANT: The TEC26x7-4 Series Thermostat

Controllers are 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.

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

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.

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 mounting base so that the

arrow on the base points upward to indicate the top

of the thermostat.

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.

Figure 1: Removing the Thermostat

Controller Cover

FIG:cvr_rmvl

Figure 2: Opening the Thermostat Controller PCB

FIG:prcrctbrd

PCB

Locking

Ta b s

Figure 3: Securing the Thermostat Controller

Mounting Base to the Wall

FIG:mntbs

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Wiring

When an existing thermostat controller is replaced,

remove and label the wires to identify the terminal

functions. When a TEC26x7-4 Series 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 Table 1 and Figure 5 through

Figure 18.

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.

3. Reinsert the screw terminal blocks onto the PCB.

4. Reattach the MS/TP communication wires to the

terminal block.

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.

5. Reattach the thermostat controller cover to the

mounting base (top side first).

6. Use a Phillips-head screwdriver to reinstall the

security screw on the bottom of the thermostat

controller cover.

IMPORTANT: Because some of the objects may

not directly correlate to a previous version, you must

rediscover all point objects for the TEC26x7-4

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.

Figure 4: Removing the Screw Terminal Blocks

FIG:trmnl_blcks

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 TEC26x7-4 Series Thermostat Controller.

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Table 1: Terminal Identification (See Figure 5.)

Terminal

Number

Terminal Label Function

TEC2627-4

(On/Off or

Floating Control)

TEC2647-4

(Proportional

0 to 10 VDC Control)

4 24 V~ Hot 24 V~ Hot 24 VAC from Transformer

5 24 V~ Com 24 V~ Com 24 VAC (Common) from Transformer

6 BO5 Aux BO5 Aux Aux BO (Auxiliary Output)

7 BO5 Aux BO5 Aux Aux BO (Auxiliary Output)

8 BO3 Blank Open Heat

9 BO4 AO2 Close Heat

10 BO1 AO1 Open Cool

11 BO2 Blank Close Cool

12 BI1 BI1 Configurable Binary Input 1

13 RS RS Remote Sensor

14 Scom Scom Sensor Common

15 BI2 BI2 Configurable Binary Input 2

16 UI3 UI3 Configurable Universal Input 3

Blank +, –, REF +, –, REF MS/TP Bus

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Figure 5: Wiring the TEC26x7-4 Series Thermostat Controller (See Table 1.)

FIG:wrng_26x7

–

+REF

Supervisory

Controller

BI2 UI3

BI1

Scom

- OR -

Remote Inputs

Supply Sensor

Changeover Sensor

Voltage-Free

Contact

• COC/NH

Normally Heat

Closed Contact

= Cold Water

• COC/NC

Normally Cool

Closed Contact

= Hot Water

Voltage-Free

Contact

• Door

• Remote

Override

• Filter Alarm

• Service Alarm

Voltage-Free

Contact

• Remote NSB

• Motion

• Window

Three-Pole

Right Top

Connector

9 10 11 12 13 14 15 16

REF

–

BO2

BO5

Aux

BO5

Aux

Scom

BO1/

AO1

UI3

BI1 BI2

BO3

Two-Pole

Left Top

Connector

24 V~

Hot

24 V~

Com

BO4/

AO2

Same 24 VAC

Power Source for Auxiliary Output

(24 VAC Maximum)

Separate 24 VAC

Power Source for Auxiliary Output

(24 VAC Maximum)

BO5

Aux

BO5

Aux

24 VAC

Thermostat Power

24 V~

Com

24 V~

Hot

BO5

Aux

BO5

Aux

Aux Contact

(Isolated Common)

• Reheat

• Lighting

• On/Off Actuation

• Exhaust Fan

Aux

24 VAC

Thermostat Power

24 V~

Com

24 V~

Hot

Eight-Pole Bottom Connector

4 5

6 7 8

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Figure 6: Wiring the TEC2627-4 Thermostat Controller for Floating Control

(Pressure-Dependent VAV Cooling Only)

Room Temperature Control Thermostat

(Minimum and Maximum Position

Adjusted on Actuator)

Floating

Actuator

UI3 COS

24 V~ Com

24 V~ Hot

BO1 Open

BO2 Close

FIG:tec2627_clng_only

Figure 7: Wiring the TEC2647-4 Thermostat Controller for Proportional 0 to 10 VDC Control

(Pressure-Dependent VAV Cooling Only)

Room Temperature Control Thermostat

(Minimum and Maximum Position

Adjusted on Actuator)

Proportional

Actuator

FIG:tec2647_clng_only

0 to 10

VDC

UI3 COS

24 V~ Com

24 V~ Hot

AO1

Figure 8: Wiring the TEC2627-4 Thermostat Controller for Floating Control

(Pressure-Dependent VAV Heating/Cooling with Changeover)

FIG:tec2627_htng_cl

ng_chngvr

Changeover

Sensor

Room Temperature Control Thermostat

(Minimum and Maximum Position

Adjusted on Actuator)

Floating

Actuator

Supply Air

Temperature Sensor

UI3 COS

24 V~ Com

24 V~ Hot

BO1 Open

BO2 Close

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Figure 9: Wiring the TEC2647-4 Thermostat Controller for Proportional 0 to 10 VDC Control

(Pressure-Dependent VAV Heating/Cooling with Changeover)

FIG:tec2647_htng_clng_chngvr

Changeover

Sensor

Room Temperature Control Thermostat

(Minimum and Maximum Position

Adjusted on Actuator)

Proportional

Actuator

Supply Air

Temperature Sensor

0 to 10

VDC

UI3 COS

24 V~ Com

24 V~ Hot

AO1

Figure 10: Wiring the TEC2627-4 Thermostat Controller for Floating Control

(Pressure-Dependent VAV Heating Cooling with Changeover and Reheat)

FIG:tec2627_htng_clng_chngvr

_rht

Changeover

Sensor

Room Temperature Control Thermostat

(Minimum and Maximum Position

Adjusted on Actuator)

Heating/Cooling

and On/Off

Duct Heater

Floating

Actuator

Supply Air

Temperature Sensor

UI3 COS

24 V~ Com

24 V~ Hot

BO1 Open

BO2 Close

BO5-Aux

Figure 11: Wiring the TEC2647-4 Thermostat Controller for Proportional 0 to 10 VDC Control

(Pressure-Dependent VAV Heating/Cooling with Changeover and Reheat)

FIG:tec2647_htng_clng_chngvr_rht

Changeover

Sensor

Room Temperature Control Thermostat

(Minimum and Maximum Position

Adjusted on Actuator)

Heating/Cooling

and On/Off

Duct Heater

Proportional

Actuator

Supply Air

Temperature Sensor

0 to 10

VDC

UI3 COS

24 V~ Com

24 V~ Hot

AO1

BO5-Aux

AO2

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Figure 12: Wiring the TEC2627-4 Thermostat Controller for Floating Control

(Heating/Cooling Hydronic Valve Control)

FIG:tec2627_htng_clng_hdrn

Room Temperature

Control Thermostat

UI3 COS

24 V~ Com

24 V~ Hot

BO1 Open

BO2 Close

Figure 13: Wiring the TEC2647-4 Thermostat Controller for Proportional 0 to 10 VDC Control

(Heating/Cooling Hydronic Valve Control)

FIG:tec2647_htng_clng_hdrnc

Room Temperature

Control Thermostat

0 to 10

VDC

UI3 COS

24 V~ Com

24 V~ Hot

AO1

Figure 14: Wiring the TEC2627-4 Thermostat Controller for Floating Control

(Heating/Cooling Hydronic Valve Control with Changeover)

FIG:tec2627_htng_clng_hdr

nc_chngvr

Floating

Heating/Cooling

Val ve

Optional Water

Supply Sensor

Room Temperature

Control Thermostat Supply Water

Temperature Sensor

UI3 COS

24 V~ Com

24 V~ Hot

BO1 Open

BO2 Close

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

Figure 15: Wiring the TEC2647-4 Thermostat Controller for Proportional 0 to 10 VDC Control

(Heating/Cooling Hydronic Valve Control with Changeover)

FIG:tec2647_htng_clng_hdrnc_chngvr

Proportional

Heating/Cooling

Val ve

Optional Water

Supply Sensor

Room Temperature

Control Thermostat

Supply Water

Temperature Sensor

0 to 10

VDC

UI3 COS

24 V~ Com

24 V~ Hot

AO1

Figure 16: Wiring the TEC2627-4 Thermostat Controller for On/Off Control

Two-Pipe Applications Four-Pipe Applications

TEC2627onoff

24 V~

Com

24 V~

Hot

24 V~

Com

24 V~

Hot

Cooling

Val ve

Heating

Val ve

Figure 17: Wiring the TEC2627-4 Thermostat Controller for Floating Control

Two-Pipe Applications Four-Pipe Applications

TEC2627floating

24 V~

Com

24 V~

Hot

BO1

Cooling

Val ve

Heating

Val ve

BO2 BO3 BO4

24 V~

Com

24 V~

Hot

BO1

Heating/Cooling

Val ve

BO2

FlexSys BACnet®MS/TP Networked Thermostat

TEC - 2647 - 4

Model:

Johnson Controls ofce. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

Installation / Operation Manual

V160916

TEC26x7-4 Series BACnet® MS/TP Networked Thermostat Controllers with Two Outputs Installation

Instructions

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.

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

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

End-of-Line Terminator (see Table 5; ordered

separately) or similar device is recommended to

provide this end-of-line 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.

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).

Figure 18: Wiring the TEC2647-4 Thermostat Controller for Proportional Control

Two-Pipe Applications Four-Pipe Applications

TEC2647proportional

Heating/Cooling

Val ve

24 V~

Com

24 V~

Hot

AO1 AO2

Cooling

Val ve

Heating

Val ve

24 V~

Com

24 V~

Hot

AO1

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