Honeywell T7300F Thermostat User Manual

T7300F/Q7300H Series 2000 Commercial

Thermostats and Communicating

Subbases

Contents

INTRODUCTION

...........................................................................................................................

Description of Devices .......................................................................................

Control Application.............................................................................................

Control Provided.................................................................................................

Product Names ..................................................................................................

Products Covered...............................................................................................

Organization of Manual ......................................................................................

Applicable Literature ..........................................................................................

Agency Listings..................................................................................................

Abbreviations and Definitions.............................................................................

CONSTRUCTION

...........................................................................................................................

Performance Specifications ...............................................................................

Input/Output Summary ..................................................................................

Communications............................................................................................

LonMark® Functional Profile.............................................................................. 10

Configurations.................................................................................................... 10

General.......................................................................................................... 10

APPLICATION STEPS

........................................................................................................................... 11

Overview ............................................................................................................ 11

Step 1. Plan The System.................................................................................... 11

Step 2. Determine Required Network Devices................................................... 12

Step 3. Lay Out Communications and Power Wiring......................................... 12

LonWorks Bus Layout ................................................................................ 12

Cable Termination ......................................................................................... 14

Singly Terminated Network Segment ....................................................... 14

Doubly Terminated Daisy-chain Network Segment .................................. 15

Wiring Details................................................................................................ 15

Step 4. Prepare Wiring Diagrams ...................................................................... 15

General Considerations................................................................................. 18

Step 5. Order Equipment.................................................................................... 19

Step 6. Configure T7300F/Q7300H.................................................................... 20

Step 7. Troubleshooting..................................................................................... 20

APPENDIX A

........................................................................................................................... 20

Sequence of Operations.................................................................................... 20

USER ADDRESS

NETWORK VARIABLES

See form number 63-4366, Q7300 Communicating Subbase System Integration

User Address Manual.

LonWorks®, LonTalk®, LonMark® and Excel LonSpec™ are

U.S. registered trademarks of Echelon® Corporation.

U.S. Registered Trademark

63- 4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

LIST OF FIGURES

Fig. 1. Typical T7300F/Q7300H LonWorks® network diagram..........................

Fig. 2. Typical T7300F/Q7300H application.......................................................

Fig. 3. T7300F/Q7300H dimensions in in. (mm). ...............................................

Fig. 4. Functional Profile Number 8060 LonMark® Thermostat Object

(

Type 09) (Thermostat profile variables not used are grayed). ..................... 10

Fig. 5. Connecting personal computer to LonWorks® Bus................................ 11

Fig. 6. Typical topology for T7300F/Q7300H devices in

LonWorks® network..................................................................................... 13

Fig. 7. Wiring layout for two doubly terminated LonWorks® Bus segments...... 13

Fig. 8. Wiring layout for one doubly terminated daisy-chain

LonWorks® Bus segment. ............................................................................ 14

Fig. 9. Singly terminated LonWorks Bus termination module. ........................ 14

Fig. 10. Doubly terminated LonWorks® Bus termination modules. ................... 15

Fig. 11. Proper wiring technique. ....................................................................... 15

Fig. 12. Ferrite core wires from Q7300H to digital inputs and outputs............... 15

Fig. 13. Typical hookup of T7300F/Q7300H in three-stage heat,

two-stage cool heat pump system................................................................. 16

Fig. 14. Typical hookup of T7300F/Q7300H in three-stage heat,

two-stage cool heat pump system................................................................. 16

Fig. 15. Typical hookup of T7300F/Q7300H in three-stage heat,

three-stage cool conventional system........................................................... 17

Fig. 16. Typical hookup of T7300F/Q7300H in two-stage heat,

one-stage cool conventional system. ............................................................ 17

LIST OF TABLES

Table 1. Additional Products. .............................................................................

Table 2. Terminal descriptions and conditions...................................................

Table 3. Application Steps. ................................................................................ 11

Table 4. LonWorks® Configuration Rules and Device Node Numbers.............. 12

Table 5. Field Wiring Reference Table ............................................................... 18

Table 6. Ordering Information. ........................................................................... 19

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

INTRODUCTION

Control Application

The T7300F/Q7300H Series 2000 Commercial

Description of Devices

Thermostats and Communicating Subbases control 24

Vac commercial single zone heating, ventilating and air

conditioning (HVAC) equipment. In addition, the Q7300H

can communicate schedule information and system

instructions to other devices in a LonWorks® network.

Fig. 2 shows a typical T7300F/Q7300H application in a

three-stage heat and two-stage cool heat pump system.

For additional T7300F/Q7300H hookups, see Fig. 13, 15,

The Q7300H Subbase is a LonMark® certified device that

provides networking capability for the T7300F Thermostat

in a LonWorks® system using a transformer-coupled Free

Topology Transceiver (FTT). See Fig. 1.

The T7300F/Q7300H communicates with all LonMark®

devices including the following:



Other T7300F/Q7300H Commercial

Thermostat/Communicating Subbases.

Excel 15 S7760A Command Display.

Excel 10 W7750A,B Constant Volume Air Handler

Unit (CVAHU) Controller.

—

Excel 15 W7760A Building Manager.

Excel 10 W7761A Remote Input/Output (RIO)

Controller.

BUILDING MANAGER

NOTEBOOK PC

WALL MODULE

EXCEL 15

W7760

EXCEL 10

CVAHU

30 31

RS-232

SERIAL

PORT

LonWorks BUS

SLTA

S7760

T7300

Back

Select

MODEM

BUILDING MANAGER

WALL MODULE

EXCEL 15

W7760

EXCEL 10

CVAHU

30 31

RS-232

SERIAL

PORT

MODEM

SLTA

LonWorks BUS

S7760

T7300

Back

Select

M16083B

Fig. 1. Typical T7300F/Q7300H LonWorks® network diagram.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

SUBBASE

A1 A2 C5

EB EB

AUX.

COMPRESSOR

CONTACTOR 2

HEAT

DISCHARGE

AIR

SENSOR

LonWorks®

BUS

FAN

RELAY

HEAT

CHANGEOVER

VALVE

CA5

CA4

CA3

CA2

CA1

COMPRESSOR

CONTACTOR 1

T7147 REMOTE COMFORT ADJUST MODULE

GND

LonWorks

BUS

EM. HT.

RELAY

ECONOMIZER

COOL

CHANGEOVER

VALVE

(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION INSTRUCTIONS.

USE A1 AND A2 WHEN CONTACTS ARE NORMALLY CLOSED IN OCCUPIED MODE.

CONNECT GND TO EARTH GROUND.

TRANSFORMER

M16056

Fig. 2. Typical T7300F/Q7300H application.

Communicating subbases for T7300F Thermostats add

value by allowing remote-site access—via telephone

lines—for diagnostics, maintenance and monitoring. In

addition, the T7300F can act as the user interface for on-

site Excel 10 Controllers (after initial installation with Excel

LonSpec™) without the need for a personal computer

workstation. Through the T7300F/Q7300H

Thermostat/Communicating Subbase, a building operator

can control Excel 10 devices by setting occupancy

schedules, setpoints and additional features.

Product Names

When combined with the T7300F Series 2000 Commercial

Thermostat, the Q7300H Communicating Subbase

communicates with other devices in a LonWorks®

network. The thermostat and subbase are available in the

following models:

Part Number

Product Description

Q7300H2003 Communicating subbase with O and B

terminals for three-stage heat, two-stage

cool heat pump system.

Control Provided

The Q7300H communicates with other network devices, or

nodes, for the purpose of sharing data. Through the

network, the T7300F/Q7300H sets and deletes schedules.

Schedules can be bypassed by selecting Continuous

Unoccupied or Temporary Override. By using network

messaging, the Q7300H sets fan operation (ON, AUTO)

and system mode (HEAT, COOL, AUTO, OFF, EM HEAT)

designated by a remote T7300F. Schedules can be

programmed for seven days with four designated periods

per day; Occupied 1, Occupied 2, Unoccupied 1 and

Unoccupied 2. In external schedule mode, the T7300F

changes occupancy through a network-based scheduler.

In local schedule mode, the T7300F changes occupancy

through an internal scheduler. If the external schedule is

not periodically updated, the T7300F defaults to the local

schedule.

Q7300H2011 Communicating subbase without O and

B terminals for three-stage heat, two-

stage cool heat pump system.

Q7300H2029 Communicating subbase for three-stage

heat, three-stage cool conventional

system.

Q7300H2037 Communicating subbase for two-stage

heat, one-stage cool conventional

system with valve two-position heat

output.

T7300F2002

Series 2000 Commercial Electronic

Thermostat without system and fan

switching.

T7300F2010

Series 2000 Commercial Electronic

Thermostat with system and fan

switching.

The T7300F/Q7300H is also able to provide time of day,

temporary setpoint, bypass status and additional

information to multiple Excel 10 devices by sending

instructions from one T7300F/Q7300H to the Excel 10

devices. When the T7300F is configured to schedule

temporary setpoint and effective bypass information for

other devices, certain restrictions apply such as:

—

When the T7300F is scheduling temporary setpoints

for Excel 10 devices, the Excel 10 cannot adjust

setpoints using the T7770 wall module.

When the T7300F is providing effective bypass

information to Excel 10 devices, the Excel 10 cannot

change the bypass status using the T7770 wall

module.

—

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Products Covered

Organization of Manual

This System Engineering manual describes how to apply

the T7300F Thermostat and Q7300H Communicating

Subbase and related accessories to typical applications.

Devices include:

This manual is divided into four basic sections:

1. Introduction. Provides an overview of the

T7300F/Q7300H, discusses related devices, lists

additional literature, and provides a glossary of

abbreviation and terms.

T7300F Series 2000 Commercial Thermostat.

Q7300H Series 2000 Communicating Subbase.

Excel 15 W7760A Building Manager.

2. Construction. Describes T7300F/Q7300H features,

network connections and dimensions.

. Application Steps. A step-by-step procedure that

provides the information necessary to plan and lay

out the T7300F/Q7300H application and accurately

order materials.

Excel 10 Controllers, as follows:

W7750A,B Constant Volume Air Handler Unit (CVAHU)

Controller.

W7761 Remote Input/Output (RIO) Controller.

4. Appendix. Appendix A provides a sequence of

operations for configuring network controllers.

Other products:

Q7751A,B Bus Router.

Q7760A Serial LonTalk Adapter.

Q7740A,B FTT Repeaters.

The organization of the manual assumes a project is being

engineered from start to finish. If you are changing an

existing system, refer to the Table of Contents for relevant

sections.

09541B FTT Termination Module.

See Table 1 for additional products.

Table 1. Additional Products.

Product Description

Contactor, 24 Vac coil, DPDT.

Transformers.

Part Number

Comments

R8242A

—

AT72D, AT88A, etc.

074EYD

Wallplate for T7770 Wall Modules.

For covering an existing hole in a

wall.

—

Serial Interface Cable, male DB-9 to female DB-9 or

female DB-25.

Obtain locally from any computer

hardware vendor.

Honeywell (US only)

AK3791 (one twisted pair)

AK3792 (two twisted pairs).

LonWorks® Bus (plenum): 22 AWG (0.325 sq mm)

twisted pair solid conductor, nonshielded or Echelon

approved shielded cable.

Level IV, 140°F (60°C) rating.

Honeywell (US only)

AK3781 (one twisted pair)

AK3782 (two twisted pairs).

LonWorks® Bus (nonplenum): 22 AWG (0.325 sq mm) Level IV, 140°F (60°C) rating.

twisted pair solid conductor, nonshielded or Echelon

approved shielded cable.

Honeywell AK3725 (US only),

typical or equivalent.

Inputs: 18 AWG (1.0 sq mm) five wire cable bundle.

Outputs/Power: 14 to 18 AWG (2.0 to 1.0 sq mm).

18 AWG (1.0 sq mm) twisted pair.

Standard thermostat wire.

NEC Class 2, 140°F (60°C) rating.

Non-plenum.

Honeywell AK3752 (US only),

typical or equivalent.

Honeywell AK3702 (US only),

typical or equivalent.

Honeywell AK3712 (US only),

typical or equivalent.

16 AWG (1.3 sq mm) twisted pair.

Non-plenum.

Honeywell AK3754 (US only),

typical or equivalent.

14 AWG (2.0 sq mm) two conductor.

Non-plenum.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Applicable Literature

ABBREVIATIONS AND DEFINITIONS

The following list of documents contains general

information related to the T7300F/Q7300H Series 2000

Commercial Thermostats and Communicating Subbases.

Application—A specific Building Control function.

Binding—The process of logically connecting network

variables in one node to network variable(s) in other

node(s). Binding is performed by a network management

node that writes the binding information into the EEPROM

memory of all the neuron's involved. The binding

Form No.

Title

2-0125

T7300F Series 2000 Commercial

Microelectronic Conventional or Heat

Pump Thermostat Installation Instructions

information is saved in the network image of each neuron.

Building Manager—A LonMark® certified device that can

be used to monitor and control HVAC equipment and other

miscellaneous loads in a distributed network.

2-0155

Q7300H Series 2000 Commercial

Thermostat Installation Instructions

4-2976

4-2977

Excel LonSpec™ Specification Data

Command Display—A device that can be used to monitor

and change parameters.

Excel LonSpec™ Software Release

Bulletin

4-2937

4-2982

Excel LonSpec™ User’s Guide

Control Loop—A primitive control function. A type of

function in a node that includes processes, loops and

programs. A node can contain one or more control loops.

Light Commercial Building Solutions

System Specification Data

(

In Excel 10 class devices, the control loop occupies the

4-2865

4-2967

E-Bus Wiring Guidelines User’s Guide

entire node.)

Excel 15 W7760A Building Manager

Specification Data

CVAHU—Excel 10 Constant Volume Air Handler Unit

Controller.

5-7565

4-2969

4-2956

5-7521

4-2958

4-2698

5-7539

4-2699

4-2697

5-7538

5-7554

Excel 15 W7760A Building Manager

Installation Instructions

Excel 10s—A family of application - specific HVAC

controllers such as the Excel 10 CVAHU and Excel 10

RIO.

Excel 15 W7760A Building Manager

System Engineering

Excel 10 W7750A,B CVAHU Controller

Specification Data

HVAC—Heating, Ventilating and Air Conditioning.

I/O—Input/Output.

Excel 10 W7750A,B CVAHU Controller

Installation Instructions

LonWorks® Network—A data network based on neurons

communicating with each other using the LonTalk®

protocol.

Excel 10 W7750A,B CVAHU Controller

System Engineering

Excel 10 W7761A RIO Controller

Specification Data

Mandatory Mechanisms/Objects/Network Variables—

Mandatory mechanisms and network variables that are

implemented in all the Excel 10 devices.

Excel 10 W7761A RIO Controller

Installation Instructions

Excel 10 W7761A RIO Controller System

Engineering

NamedObject—Objects that have names are called

NamedObjects. These objects are visible on the network

as functional independent entities and are accessed by

name. Typical examples of NamedObjects are Controllers,

ControlLoops and LogicFunction blocks.

T7770A, B, C, D, E, F, G Wall Module

Specification Data

T7770A, B, C, D, E, F, G Wall Module

Installation Instructions

Network Management Node—A LonWorks® node that is

responsible for configuring the network, installing the

nodes, binding the network variables between nodes, and

general network diagnostics.

209541B Termination Module Installation

Instructions

Agency Listings

European Community Mark (CE): Conforms to

requirements of European Consortium Standards.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Network Variables—A class of variables defined in

RIO—Excel 10 Remote Input/Output device.

RTC—Real Time Clock.

Neuron C that allows communication over the LonWorks®

network to other nodes on the network. An output network

variable in one node can be bound to corresponding input

network variable(s) in other node(s). Changing the value of

the output network variable in one node causes the new

value to be automatically communicated to the bound input

network variable(s) in other node(s). When an input

network variable is updated, an nv_update_occurs event is

posted at the receiving node(s) so that the application

program can take action based on the change. A network

management node that explicitly reads and/or writes the

network variable can also poll network variables. Network

variables can contain one data field (one or two bytes) or

multiple data fields (a structure).

Schedule—The structure that defines the occupancy

states, setpoints and the time of the changes between

these states.

SGPU—Significant Event Notification and Guaranteed

Periodic Update.

SGPUC—Significant Event Notification and Guaranteed

Periodic Update with Change Field.

SLTA—Serial LonTalk® Adapter. Adapts the transformer

coupled LonTalk® messages to the RS-232 Serial Port.

Node—A device implementing layers one through six of

the LonTalk® protocol including a Neuron® Chip,

transceiver, memory, and support hardware.

SNVT—Standard Network Variable Type.

SCPT—Standard Configuration Parameter Type.

Notebook PC—Portable personal computer.

Optional Mechanism/Object/Network Variables—

Optional mechanisms and variables that shall be

implemented on an as-needed basis. However, a different

mechanism or network variable cannot be implemented if

an existing optional mechanism or network variable can

perform the same function.

CONSTRUCTION

The T7300F Thermostat has a keypad for setting system

parameters, a corresponding LCD display and a flip-down

keypad cover. The T7300F Thermostat mounts on the

Q7300H Subbase.

Programmable Controller—A controller that has a

variable number of control loops of different types and is

user-programmed to execute an application. The user can

select the number and type of control loops. The user also

has the capability of generating new types of control loops.

The Q7300H Communicating Subbase includes

LonWorks® Bus terminals and a jack for temporary

network connections to a personal computer. A service pin

push button provides service messaging to physically

locate the device on the LonWorks® network. The

subbase mounts horizontally on the wall or on a

Recovery Mode or Recovery Period—The time in

unoccupied periods when the temperature control is

adjusting the control setpoint so that the space

temperature reaches the occupied setpoint when the

schedule change occurs.

in. x 4 in. junction box.

Fig. 3 shows T7300F/Q7300H dimensions.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

6-11/16 (170)

1/16 (2)

3-3/16 (77)

1-3/8 (35)

(

-7/8

47)

4-1/8

(105)

1-11/16

(43)

7-5/16 (186)

7/8

(22)

-5/8

Set Program

Unoccupied

Start Time

Set Temperature

Run

Program

Occupied

Start Time

Change

Time/Temp

(117)

Occupied

Temp

Unoccupied

Temp

Day

Temporary

Occupied

Set Current

Day/Time

Clear

Start Time

Heat/Cool

Settings

Copy

Continous

Unoccupied

System

Fan

M16086A

Fig. 3. T7300F/Q7300H dimensions in in. (mm).

Differential:

Performance Specifications

°F (1°C).

Electrical Ratings:

Humidity Ratings:

% to 90% RH, noncondensing.

Power: 20 to 30 Vac, 50/60 Hz.

System Current: 6 VA maximum at 30 Vac, 50 or 60 Hz.

Input/Output Summary:

Temperature Ratings:

Setpoint Range: Heating: 40°F to 90°F (4°C to 32°C;

Cooling: 45°F to 90°F (7°C to 32°C).

Operating: 40°F to 110°F (4°C to 43°C).

Shipping: -20°F to +130°F (-29°C to +54°C).

Display Accuracy: ±1°F (+0.5°C).

Table 2 summarizes the T7300F/Q7300H

Thermostat/Subbase inputs and outputs.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Table 2. Terminal descriptions and conditions.

Standard Terminal

Designations

Typical Connection

Function

Terminal Type

A1, A3

Damper control relay. See T7300F Installation Instructions, form

Output

Dry contract

9-1025-3, installer setup 18, for control parameters.

AS,AS

Dry auxiliary contact. (A2 is common to A1, A3.)

C7150B Discharge Air Sensor connection.

Heating changeover valve.

Input

—

Output

24V powered

contact

ML7984 Actuator connection. No call for heat; valve closed

during occupied periods and open during unoccupied periods.

Output

—

C1, C2, C3, C4, C5 Communication input for T7147.

Input/Output

Output

Low power

Emergency heat relay.

24V powered

contact

EB, EB

LonWorks® Bus connection to LonWorks® network.

Fan control transformer.

Input/output

Input

Communications

—

Fan relay.

Output

High speed fan output. Activated during call for cooling.

Output

Low speed fan output. Activated on call for heat and fan On

selection.

Output

Cooling changeover valve.

Output

—

P1, P2

Pump interlock relay. Operates circulator pump in hydronic heat

or energizes conventional heat system.

Input, output

24V system transformer.

24V cooling transformer.

24V heating transformer.

Input

—

Input

ML7984 Actuator connection. No call for heat; valve closed. Call

for stage 1 heat; valve approximately one-half open. Call for

stage 2 heat; valve fully open.

Output

T, T

Remote sensor input for T7047 or T7147.

Stage 1 heating relay or auxiliary heat relay.

Stage 2 heating relay

Input

Output

—

Output

Stage 3 heating relay

Output

Heating transformer common.

Cool call.

Input

24V output on Y

Output

Stage 1 compressor contactor.

Stage 2 cooling compressor (conventional). Stage 2

compressor contactor (heat pump).

Output

Stage 3 cooling compressor.

Output

—

verification and future expansion of the network. It also

minimizes unknown or inaccurate wire run lengths, node-

to-node (device-to-device) distances, node counts, total

wire length, inaccurate repeater/router locations, and

misplaced or missing terminations. LonWorks® networks

can be configured in a variety of ways; refer to the E-Bus

FTT Network Wiring Guidelines, form 74-2865-1, for a

complete description of network topology rules and

maximum wire length. If longer runs are required, add a

Q7740A 2-way or Q7740B 4-way repeater to extend the

LonWorks® Bus length. Add a Q7751A to partition the

system into two segments to double the length of

LonWorks® Bus.

Communications

The Q7300H provides networking capability in a

LonWorks® system when using a Free Topology

Transceiver (FTT) transformer-coupled communications

port running at 78 kilobits per second (kbs). The

transformer-coupled communications interface offers a

much higher degree of common-mode noise rejection

while ensuring dc isolation.

LonWorks® FTT networks are very flexible and convenient

to install and maintain, but it is imperative that the network

layout be carefully planned and accurate documentation

created and maintained. This aids in compliance

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Approved cable types for LonWorks® Bus

NOTE: For additional information on the LonMark®

Functional Profile, see the LonMark® Application

Layer Interoperability Guidelines and the

communications wiring are Level IV, 22 AWG (0.34 sq

mm) plenum or non-plenum rated unshielded, twisted pair,

solid conductor wire. For nonplenum areas, use US part

AK3781 (one pair) or US part AK3782 (two pair). In

plenum areas, use US part AK3791 (one pair) or US part

AK3792 (two pair). Other Echelon approved cable may

also be used. Run communications wiring in a conduit, if

needed, with non-switched 24 Vac or sensor wiring. The

Free Topology Transceiver (FTT) communications

LonWorks® Bus supports a polarity insensitive, free

topology wiring scheme that, in turn, supports star, loop,

and/or bus wiring.

LonMark® Functional Profile: Thermostat. Both

documents are available from LonMark® at

internet address: www.lonmark.org.

CONFIGURATIONS

General

The T7300F/Q7300H can be configured to perform a

variety of activities in which data is sent to and/or received

from other nodes on the LonWorks network.

LonMark® Functional Profile

The Q7300H supports the LonMark® Functional Profile

Number 8060,Thermostat Object (Type 09). See Fig. 4.

Information that can be shared with other network devices

includes:

—

Day-of-week and time-of-day

System mode (HEAT, COOL, AUTO, OFF, EM HEAT)

Current fan setting (ON, AUTO)

Space temperature

Hardware

Output

Thermostat Object

Type Number 09.

Current setpoint

nviSetpoint

nvoHeatOutput

Occupied/Unoccupied schedule commands

Current occupancy status

Relay status (heat/cool stages and fan)

Alarm status

nv1

nv2

SNVT_temp_p

SNVT_ lev_percent

nvoCoolOutput

SNVT_ lev_percent

Mandatory nv3

Network

Variables

Alarm log

nvoSpaceTemp

SNVT_ temp_p

nv4

nv5

A network configuration tool is used to configure Q7300Hs

and other nodes with which the Q7300H interacts.

nvoUnitStatus

SNVT_hvac_status

nviSpaceTemp

SNVT_ temp_p

nvoTerminalLoad

The following is a brief description of the configurable

features that can be commanded over the network:

nv6

nv7

nv8

nv9

nv11

nv12

nv13

nv14

SNVT_ lev_percent

nviOccCmd

SNVT_occupancy

nvoEffectSetpt

SNVT_ temp_p

•

Day-of-Week/Time-of-Day:

When a T7300F Thermostat is designated as the

network time master, the current time of day and day of

week is synchronized across the network every minute.

Whenever the time of day or day of week of the time

master is changed, it automatically adjusts all the other

T7300Fs on the network. When a T7300F is controlled

by a time master, its time cannot be changed using its

keypad. If an attempt is made to change its time, the

controlled T7300F LED displays LOC.

Optional

Network

Variables

nviApplicMode

SNVT_hvac_mode

nvoTerminalfan

SNVT_switch

nviSetptOffset

SNVT_ temp_p

nvoEnergyHoldOff

SNVT_switch

nviEnergyHoldOff

SNVT_switch

nv10

Configuration Properties

nc49 - nciSndHrtBt

SNVT_time_sec

SNVT_temp_p

SNVT_str_asc

SNVT_temp_setpt

SNVT_temp_p

(mandatory)

•

System Switch Settings:

nc48 - nciRcvHrtBt

nc64 - nciMin Delta

nc17 - neiLocation

nc60 - nciSetPnts

nc79 - nciUpSPHeat

nc80 - nciLrSPHeat

nc76 - nciUpSPCool

nc77 - nciLrSPCool

(optional)

(mandatory)

(optional)

System switch settings (HEAT, COOL, AUTO, OFF, EM

HEAT) can be designated by a remote T7300F, or if

configured to allow it, from the T7300F keypad.

Fan Settings:

Fan settings (ON, AUTO) are selected as designated by

a remote T7300F, or from the T7300F keypad.

Space Temperature:

•

Manufacturer

Defined

If a valid space temperature value is received at the

Q7300H DestRmTemp network variable input, that

value will be used in the T7300F as the primary

controlled variable. In this case, the internal space

sensor of the T7300F is ignored.

Section

Hardware

Input

M16087A

•

Current Setpoint:

If a valid setpoint value is received at Q7300H

DestSetPoint, that value will be used by the Q7300H as

the center setpoint. The heat and cool setpoints are

then calculated from this value and are used in the

T7300F as the occupied setpoints. During unoccupied

periods, DestSetPoint is ignored.

Fig. 4. Functional Profile Number 8060 LonMark®

Thermostat Object (Type 09).

(

Thermostat profile variables not used are grayed).

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

•

Schedule:

Table 3. Application Steps.

The occupancy schedule used by a T7300F may reside

locally in that device or remotely in another schedule

device (T7300F or Excel 15). Local schedules can be

created and modified using the T7300F keypad, or with

a configuration tool. External schedules can also be

modified using the keypad of the schedule device, or

with a configuration tool. When a T7300F receives

scheduling information over the network, the user is

locked out from making schedule changes at the

keypad, and the LCD displays LOC if attempted. When

a T7300F Thermostat is designated as a schedule

device, it sends its schedule file to the appropriate

Q7300H(s) which, in turn, overwrites any existing

internal schedule in their T7300F Thermostat. The

T7300F/Q7300H Thermostat/Subbase can provide

scheduling information to multiple Excel 10 devices by

taking instruction from one T7300F/Q7300H and

sharing the information with the desired Excel 10

devices.

Step

Description

Plan the system.

Determine required network devices.

Lay out communications and power wiring.

Prepare wiring diagrams.

Order equipment.

Configure T7300F/Q7300H.

Troubleshooting.

Step 1. Plan the System

Plan the use of the T7300F/Q7300H Thermostat/Subbase

according to the job requirements. Determine the location

and functionality. Verify the sales estimate for the number

of other controllers and devices required. Check the

number and type of other required accessories.

•

Occupancy Bypass:

Any internal schedule in the T7300F is overridden if a

valid occupancy command is received by its Q7300H

(

resulting from an existing external schedule on the

When planning the system layout, consider potential

expansion possibilities for future growth. Planning is very

important if HVAC systems and controllers are to be added

in future projects.

LonWorks network).

Continuous Unoccupied:

In this mode, the T7300F Thermostat sets the operating

setpoints to the unoccupied setpoints. The T7300F

remains in this mode until the Run Program key is

pressed.

NOTEBOOK PC

Setpoint Changes:

SHIELDED

INTERFACE

CABLE

RS-232

Selecting a temporary setpoint modifies that setpoint for

the present schedule period. Pressing Run Program

terminates temporary setpoints. Temperature setpoint

range is 40°F to 90°F (4°C to 32°C).

T7300

SERIAL

PORT

Q7760

SLTA

Temporary Override:

Modifies the schedule to operate the thermostat in

occupied mode for a designated number of hours.

Temporary occupied time can be selected for 1, 3, 8 or

CABLE

PART

NO. 205979

LonWorks

BUS PORT

2 hours. If a change from occupied to unoccupied is

M10102B

scheduled and the Temporary Override key is pressed,

the thermostat remains in occupied mode until the

designated override time expires. If the thermostat is in

the unoccupied mode when the Temporary Occupied

key is pressed, the thermostat operates at the occupied

setpoint until the override time expires.

Fig. 5. Connecting personal computer to LonWorks

Bus.

Refer to the E-Bus Wiring Guidelines, form 74-2865 for a

complete description of network topology rules. See

Application Step 3. Lay Out Communications and Power

Wiring, for more information on bus wiring layout and Fig.

APPLICATION STEPS

through 10 in Application Step 4. Prepare Wiring

Diagrams, for wiring details.

Overview

Refer to the Excel LonSpec™ User Guide, form 74-2937,

to configure the W7760A Building Manager, W7750A,B

and W7761 Controllers and the Q7300H Subbase.

The application steps shown in Table 3 are guidelines for

configuring the T7300F/Q7300H Thermostat/Subbase in a

LonWorks® Bus network and explain the network role of

the T7300F/Q7300H.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

In addition, a 209541B Termination Module may be

Step 2. Determine Required Network

required. Refer to the E-Bus Wiring Guidelines, form 74-

Devices

2865, and the Excel 10 FTT Termination Module

Installation Instructions form, 95-7554, or if Excel 15s are

present, see Application Step 3. Lay Out Communications

and Power Wiring in the W7760A System Engineering

Guide, form 74-2969.

A maximum of 60 nodes can communicate on a single

LonWorks Bus segment. Each LonWorks Bus device

comprises one node. If more than 60 nodes are needed, a

Q7751A Router or Q7740 Repeater is necessary. In a

network with Excel 15 devices, a router allows up to 120

controller nodes per network, divided between two

LonWorks Bus segments. A router or repeater allows up

to 120 controller nodes per network, divided between two

LonWorks Bus segments. The router comprises two

nodes (one node on each side of the router). Router and

operator access nodes are not counted in the maximum

controller node totals. All devices are able to talk to each

other through the router.

Step 3. Lay Out Communications and

Power Wiring

LonWorks® Bus Layout

The communications LonWorks Bus, is a 78-kilobit

network that uses transformer isolation and differential

Manchester encoding.

Multiple operator terminals can be connected to the

LonWorks Bus at the same time. Table 4 summarizes

the LonWorks Bus segment configuration rules.

The Free Topology Transceiver (FTT) LonWorks

communications Bus supports a polarity insensitive, free

topology wiring scheme, refer to the E-Bus Wiring

Guidelines form, 74-2865, for a complete description of

LonWorks network topology rules.

Refer to the E-Bus Wiring Guidelines, form 74-2865, for a

complete description of network topology rules and

maximum wire lengths. If longer runs are required, use a

Q7740A 2-way or Q7740B 4-way repeater to extend the

length of the LonWorks Bus. Each network segment can

only have one repeater. If more nodes or longer distances

are required, add a router or repeater to limit bus traffic or

boost distance.

Fig. 6 shows a typical wiring diagram for the

T7300F/Q7300H in a LonWorks® network. Fig. 7 and 8

show wiring layouts for two doubly daisy-chained

LonWorks Bus segments.

Table 4. LonWorks Bus Configuration Rules and Device Node Numbers.

One LonWorks Bus Segment

Maximum number of Excel 10s

Maximum Number of Controller Nodes 60

60 nodes (minus number of Excel 15s)

4 nodes

Maximum number of Excel 15s

Total 60 nodes maximum

Two LonWorks Bus Segments; with Excel 15

Maximum Number of Controller Nodes 112, plus two

nodes for router access.

Controllers, more than 60 devices

One Q7751A,B Router

2 nodes

Maximum number of Excel 15s

8 nodes

Maximum number of Excel 10 RIO devices

Maximum number of Excel 10s (20 per each Excel 15)

24 nodes

112 nodes (minus number of RIOs)

Total 122 nodes maximum

Two LonWorks Bus Segments; without Excel 15

Maximum Number of Controller Nodes 120, plus two

nodes for router access.

Controllers, more than 60 devices

One Q7751A,B Router

2 nodes

Maximum number of Excel 10s (60 per segment)

120 nodes

Total 122 nodes maximum

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

NOTEBOOK PC

T7300

RS-232

LonWorks BUS

SLTA

T7300

MODEM

RS-232

LonWorks BUS

SLTA

T7300

MODEM

RS-232

LonWorks BUS

SLTA

M16063A

Fig. 6. Typical topology for T7300F/Q7300H devices in LonWorks network.

209541B

TERMINATION

MODULE

LonWorks BUS SEGMENT NUMBER 1

T7300

EXCEL 10

CVAHU

EXCEL 10

CVAHU

T7770

CVAHU

209541B

TERMINATION

MODULE

TERMINATION

MODULE

LonWorks

BUS ACCESS

LonWorks BUS

SEGMENT NUMBER 2

T7300

BUILDING MANAGER

Q7751A

FTT

EXCEL 15

W7760

E-BUS

ROUTER

209541B

TERMINATION

MODULE

30 31

LonWorks BUS SEGMENT NUMBER 2

EXCEL 10

CVAHU

EXCEL 10

CVAHU

EXCEL 10

CVAHU

M16084C

Fig. 7. Wiring layout for two doubly terminated LonWorks Bus segments.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

LonWorks BUS

EXCEL 10

CVAHU

EXCEL 10

RI0

EXCEL 10

RI0

T7770

EXCEL 10

RI0

T7300

09541B TERMINATION

MODULES (AT ENDS OF

LonWorks BUS

DAISY-CHAIN)

T7300

EXCEL 10

CVAHU

T7770

WITH NO

LonWorks

T7300

BUS ACCESS

BUILDING MANAGER

EXCEL 15

W7760

EXCEL 10

RI0

T7300

30 31

LonWorks

BUS

T7770

WITH NO

LonWorks

BUS ACCESS

EXCEL 10

RI0

EXCEL 10

CVAHU

EXCEL 10

RI0

EXCEL 10

RI0

T7770

LonWorks BUS

T7770

JACK FOR

OPERATOR

TERMINAL

T7770

I/O CONNECTIONS

M16085B

Fig. 8. Wiring layout for one doubly terminated daisy-chain LonWorks segment.

Cable Termination

The FTT network segment requires termination for proper

data transmission performance. Use a 209541B

C1 C2 C3 C4 C5

Termination Module to connect two of the three termination

module wires to the LonWorks Bus terminals.

EB EB

T AS AS

Singly Terminated Network Segment

In a singly terminated topology segment, only one

termination is required and can be placed anywhere on the

segment. Singly terminated segments use the yellow and

brown wires. Mount the termination modules on the

appropriate terminals as shown in Fig. 9.

YELLOW

BROWN

PART NO. 209541B

TERMINATION MODULE

M16202

ORANGE

Fig. 9. Singly terminated LonWorks Bus termination

module.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

. Securely tighten each terminal screw.

. Push excess wire back into the hole.

. Plug the hole with nonflammable insulation to

prevent drafts from affecting the thermostat.

Doubly Terminated Daisy-Chain Network Segment

In a doubly terminated daisy-chained topology segment,

two terminations are required, one at each end of the

topology segment. Doubly terminated segments use the

orange and brown wires. Mount the termination modules

on the appropriate terminals as shown in Fig. 10. For

additional wiring information, refer to the E-Bus Wiring

Guidelines, form 74-2865, and the Excel 10 FTT

NOTE: After wiring, check that all connections are tight

and secure. See Fig. 11. Loose or intermittent

wire connections can cause inconsistent system

operation.

Termination Module Installation Instructions, form 95-7554.

C1 C2 C3 C4 C5

FOR STRAIGHT

INSERTION STRIP

FOR WRAPAROUND

INSERTION STRIP

7/16 IN. (11 MM).

5/16 IN. (8 MM).

EB EB

T AS AS

M4826

Fig. 11. Proper wiring technique.

BROWN

ORANGE

Wiring Details

PART NO. 209541B

TERMINATION MODULE

LonWorks® network cable should be wired separately

from the power and I/O wires when installing Q7300s. If

this is not possible, use a minimum of 4 in. (102 mm)

separation between split ferrite cores (Fair-Rite

YELLOW

443164151, or equivalent Honeywell part no. 229997CB,

containing five split ferrite cores) to ensure compliance

with Class B limits (does not apply to Class A limits). See

Fig. 12. to apply ferrite cores to LonWorks® Bus input and

output.

C1 C2 C3 C4 C5

EB EB

T AS AS

WIRES TO Q7300H

COMMUNICATING SUBBASE

BROWN

ORANGE

PART NO. 209541B

TERMINATION MODULE

WIRES TO ALL

INPUTS AND

OUTPUTS

YELLOW

WIRES TO ALL

INPUTS AND

OUTPUTS

M16122

Fig. 10. Doubly terminated LonWorks Bus

termination modules.

WIRES TO Q7300H

COMMUNICATING SUBBASE

M10886A

CAUTION

Power supply can cause electrical shock.

Disconnect power supply before beginning

installation.

Electrical Shock Hazard.

Fig. 12. Ferrite core wires from Q7300H to LonWorks®

inputs and outputs.

. Loosen the terminal screws on the subbase and

connect the system wires. See Fig. 11.

Step 4. Prepare Wiring Diagrams

Fig. 13 through 16 show T7300F/Q7300H terminal

arrangements and provide detailed wiring diagrams.

Reference these diagrams to prepare the site-specific job

drawings.

IMPORTANT

Use 18-gauge, solid-conductor color-coded

thermostat cable for proper wiring. If using 18-

gauge stranded wire, do not use more than two

wires. Do not use larger than 18-gauge wire.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

SUBBASE

W3 W2 W1 R

A1 A2 A3 C5 C4

EB EB

EM. HT.

RELAY

HEAT

RELAY 2

COMPRESSOR

CONTACTOR 1

ECONOMIZER

DISCHARGE

AIR

SENSOR

LonWorks BUS

CA5 CA4 CA3 CA2 CA1

FAN

RELAY

T7147 REMOTE COMFORT ADJUST MODULE

GND

HEAT

RELAY 3

LonWorks BUS

COMPRESSOR

CONTACTOR 2

HEAT

RELAY 1

(

HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

TRANSFORMER

USE A1 AND A2 WHEN CONTACTS ARE NORMALLY CLOSED IN OCCUPIED MODE.

USE A2 AND A3 WHEN CONTACTS ARE NORMALLY OPEN IN OCCUPIED MODE.

CONNECT GND TO EARTH GROUND.

M16057

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

Fig. 13. Typical hookup of T7300F/Q7300H in three-stage heat, two-stage cool heat pump system

(

without O/B terminals).

SUBBASE

A1 A2 C5

EB EB

AUX.

COMPRESSOR

CONTACTOR 2

HEAT

DISCHARGE

AIR

SENSOR

LonWorks®

BUS

FAN

RELAY

HEAT

CHANGEOVER

VALVE

CA5

CA4

CA3

CA2

CA1

COMPRESSOR

CONTACTOR 1

T7147 REMOTE COMFORT ADJUST MODULE

GND

LonWorks

BUS

EM. HT.

RELAY

ECONOMIZER

COOL

CHANGEOVER

VALVE

(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION INSTRUCTIONS.

USE A1 AND A2 WHEN CONTACTS ARE NORMALLY CLOSED IN OCCUPIED MODE.

CONNECT GND TO EARTH GROUND.

TRANSFORMER

M16056

Fig. 14. Typical hookup of T7300F/Q7300H in three-stage heat, two-stage cool heat pump system (with O/B terminals).

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

SUBBASE

W2 W1 RH

A1 A2 A3 C5

EB EB

COMPRESSOR

CONTACTOR 1

HEAT

RELAY 2

COMPRESSOR

CONTACTOR 2

ECONOMIZER

DISCHARGE

AIR

SENSOR

LonWorks

BUS

CA5

CA4

CA3

CA2

CA1

FAN

RELAY

T7147 REMOTE COMFORT ADJUST MODULE

LonWorks

BUS

COMPRESSOR

CONTACTOR 3

GND

HEAT

RELAY 3

HEAT

RELAY 1

(HOT)

HOT)

(

HEATING

TRANSFORMER

COOLING

TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

CONNECT GND TO EARTH GROUND.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

JUMPER RC TERMINAL TO RH TERMINAL WHEN INSTALLED ON A

SYSTEM WITH ONE TRANSFORMER.

M16058

USE A1 AND A2 WHEN CONTACTS ARE NORMALLY CLOSED

IN OCCUPIED MODE. USE A2 AND A3 WHEN CONTACTS

ARE NORMALLY OPEN IN OCCUPIED MODE.

Fig. 15. Typical hookup of T7300F/Q7300H in three-stage heat, three-stage cool conventional system.

SUBBASE

AS FC

RM BM P1 P2 A1 A2

C5 C4 C3

C2 C1

EB EB

HIGH

SPEED

FAN

DAMPER

CONTROL

RELAY

ML7984

VALVE

ACTUATOR

DISCHARGE

AIR

LonWorks BUS

RELAY

SENSOR

LOW

SPEED

FAN

CA2 CA1

T7147 REMOTE COMFORT

ADJUST MODULE

CA5 CA4 CA3

LonWorks BUS

COOLING

RELAY

PUMP

INTERLOCK

RELAY

GND

RELAY

HOT)

(

HOT)

(

FAN TRANSFORMER

TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

CONNECT GND TO EARTH GROUND.

M16059

SEE TABLE 2 FOR VALVE AND VALVE ACTUATOR MODELS.

Fig. 16. Typical hookup of T7300F/Q7300H in two-stage heat, one-stage cool conventional system.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

General Considerations

Table 5 lists wiring types, sizes and distances for the T7300F/Q7300H and Excel 10 products. The Q73000H accepts 14

through 22 AWG (2.0 to 0.34 sq. mm wire).

Table 5. Field Wiring Reference Table.

Recommended

Wire

Wire Size

Specification

Distance

Function

(Minimum)

Construction

or Requirement

Vendor Wire Type

(Maximum)

Thermostat

wire.

Inputs: 18 AWG

(1.0 sq mm) five

wire cable bundle.

Standard thermostat

wire.



Honeywell AK3725

(US only), typical or

equivalent.



Thermostat

wire.

Outputs/Power:

14 to 18 AWG

NEC Class 2, 140°F

(60°C) rating.

Level IV, 140°F

(60°C) rating.

Honeywell AK3752

(US only), typical or

equivalent.

(

2.0 to

.0 sq mm).

LonWorks

Bus (Non-

Plenum).

22 AWG

(0.34 sq mm)

Twisted pair solid

conductor,

nonshielded or

Echelon® approved

cable.

Level IV, 140°F

(60°C) rating.

Honeywell AK3781

(one twisted pair),

AK3782 (two twisted

pair).

Refer to E-bus

Wiring guidelines

Users Guide

74-2865-1 for

maximum length.

Power

Wiring.

14 AWG

(2.0 sq mm)

Any pair nonshielded NEC Class II,

Honeywell AK3754

(14 AWG) twisted

pair), AK3909

Limited by line-loss

effects on power

consumption.

(use heavier wire for

longer runs).

140°F (60°C)

rating.

(

14 AWG) single

conductor or

equivalent.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Step 5. Order Equipment

After compiling a bill of materials through completion of the previous application steps, refer to Table 6, Ordering Information.

Table 6. Ordering Information.

Part Number

Q7300H2003

Product Description

Comments

Communicating subbase with O and B

terminals for three-stage heat, two-stage cool sensing; A1, A2, A3 terminals for optional

Includes AS terminals for optional discharge air

heat pump system.

economizer.

Q7300H2011

Q7300H2029

Q7300H2037

T7300F2002

Communicating subbase without O and B

terminals for three-stage heat, two-stage cool sensing; A1, A2, A3 terminals for optional

heat pump system.

Includes AS terminals for optional discharge air

economizer.

Communicating subbase for three-stage

heat, three-stage cool conventional system. sensing; A1, A2, A3 terminals for optional

economizer.

Includes AS terminals for optional discharge air

Communicating subbase for two-stage heat, Includes AS terminals for optional discharge air

one-stage cool conventional system with

valve two-position heat output.

sensing; A1, A2, A3 terminals for optional

economizer.

Series 2000 Commercial Electronic

Thermostat without system and fan

switching.

Use with Q7300H Communicating Subbase for

network communications.

T7300F2010

W7750A,B

W7761A

—

Series 2000 Commercial Electronic

Thermostat with system and fan switching.

Use with Q7300H Communicating Subbase for

network communications.

Excel 10 Constant Volume Air Handler Unit. Single-speed fan provides continuous supply air

to designated area.

Excel 10 Remote Input/Output Device.

Service messaging feature identifies physical

location of specific Excel 10s on network.

Serial Interface Cable, male DB-9 to female Obtain locally from any computer hardware

DB-9 or female DB-25.

vendor.

Honeywell (US only)

AK3791 (one twisted pair)

AK3792 (two twisted pairs).

LonWorks Bus (plenum): 22 AWG

(0.325 sq mm) twisted pair solid conductor,

nonshielded or Echelon approved shielded

cable.

Level IV, 140°F (60°C) rating.

Honeywell (US only)

AK3781 (one twisted pair)

AK3782 (two twisted pairs).

LonWorks Bus (nonplenum): 22 AWG

(0.325 sq mm) twisted pair solid conductor,

nonshielded or Echelon approved shielded

cable.

Level IV, 140°F (60°C) rating.

Honeywell AK3725 (US only), Inputs: 18 AWG (1.0 sq mm) five wire cable Standard thermostat wire.

typical or equivalent. bundle.

Honeywell AK3752 (US only), Outputs/Power: 14 to 18 AWG

typical or equivalent. (2.0 to 1.0 sq mm).

NEC Class 2, 140°F (60°C) rating.

Honeywell AK3702 (US only), 18 AWG (1.0 sq mm) twisted pair.

typical or equivalent.

Non-plenum.

Honeywell AK3712 (US only), 16 AWG (1.3 sq mm) twisted pair.

typical or equivalent.

Non-plenum.

Honeywell AK3754 (US only), 14 AWG (2.0 sq mm) two conductor.

typical or equivalent.

Non-plenum.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

communicated to the Q7300H). The Room Temperature

Step 6. Configure T7300F/Q7300H

sensor provides the temperature input for the temperature

control loop of the T7300F. If both local and remote

sensors are available, the two values can be averaged and

the resulting value supplied to the temperature control

Use Excel LonSpec™ Software to configure the

T7300F/Q7300H Thermostat/Subbase for specific

applications. The Excel LonSpec™ User’s Guide, form 74-

routine.

937, provides software operation instructions for the

personal computer.

NOTE: A physical sensor (either local or remote) cannot

be averaged with a network sensor. A valid value

for the network sensor input gives the network

sensor priority over any locally-wired sensors.

Step 7. Troubleshooting

. Check for 24 Vac power.

If a valid room temperature value is not available to the

T7300F/Q7300H, the temperature control algorithm in the

T7300F is disabled, causing the heating and cooling

control outputs to be turned off.

a. Turn on power.

b. Use a meter to check for 24 Vac power at the

subbase.

c. If 24 Vac is not present, check the transformer

for secure connections and proper operation.

d. If 24 Vac is present at the subbase, turn off the

power.

Network Setpoint (DestSetPoint)

This is a center-setpoint signal sent from another

LonWorks Bus device. When received, it is used to

calculate the actual cooling or heating occupied setpoint.

The DestSetPoint value becomes the center of the Zero

Energy Band (ZEB) between the cooling and heating

occupied setpoints. The size of the ZEB is found by taking

the difference between the programmed heating and

cooling occupied setpoints (CoolOccSpt and HeatOccSpt);

therefore, the actual setpoints are found as follows:

ActualCoolSpt = DestSetPoint + (CoolOccSpt -

HeatOccSpt) / 2

. Check wiring.

a. Inspect all wiring connections at the Q7300H

terminals and verify compliance with the job

site engineering drawings.

b. If any wiring changes are required, first be

sure to remove power from the device before

starting work.

c. Pay particular attention to:



Terminal connections. Connect GND to

earth ground.

Device Wiring. In hookups with A1 and A2

terminals, use A1 and A2 when contacts

are normally closed in Occupied mode. In

hookups with A2, A3 terminals, use A2

and A3 when contacts are normally open

in Occupied mode.

ActualHeatSpt = DestSetPoint - (CoolOccSpt -

HeatOccSpt) / 2

During unoccupied times, the network setpoint value is not

referenced, and the programmed setpoints are used

instead (CoolUnoccSpt and HeatUnoccSpt). During

occupied times, if DestSetPoint is valid, it will be used to

override any internal setpoints.



O/B Terminals. The Q7300H2003

provides O/B terminals for cool/heat

changeover.

Network Setpoint Offset (DestSptOffset)

NOTE: All wiring must comply with applicable electrical

codes and ordinances or as specified in

installation wiring diagrams.

This is a setpoint adjustment signal sent from another

LonWorks device. When received, it is used to bump the

current setpoint value up or down. The amount of the

bump is the value of DestSptOffset itself. The actual

setpoints are found as follows:

APPENDIX A: SEQUENCE OF

OPERATIONS

ActualSetpoint = CurrentSetPoint + DestSptOffset

During unoccupied times, the network setpoint offset value

is not referenced, and the programmed setpoints are used

instead (CoolUnoccSpt and HeatUnoccSpt).

This appendix provides the network related control

sequences of operation for the T7300F/Q7300H. For

temperature control related sequences, refer to the

T7200D,E, T7300D,E,F and Q7300 Series 2000

Programmable Commercial Thermostat and Subbase

Product Data, form no. 63-4355.

Setpoint Limits (MinCoolSetPt and MaxHeatSetPt)

User-entered setpoint limits are provided by MinCoolSetPt

and MaxHeatSetPt. The occupied setpoints used in the

control algorithms are limited by these parameters. The

lowest actual setpoint allowed in cool mode is equal to

MinCoolSetPt, and the highest actual setpoint allowed in

heat mode is equal to MaxHeatSetPt.

Network Operations

Room Temperature Sensor (DestRmTemp)

This is the room space temperature sensor. This sensor

can be local (contained internally within the T7300F),

remote (external but hard-wired back to the Q7300H

subbase), or network (physical sensor is located

elsewhere on the LonWorks Bus, and its value is

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T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

If DestOccSchedule is valid, it has highest priority and

determines the occupancy mode; otherwise, the status is

determined by the internal schedule of the T7300F.

StatusOcc has two possible states: occupied, or

unoccupied.

Bypass Operation (StatusOcc, DestManOcc and

DestBypass)

During unoccupied periods, the facility occupant can

request that the occupied temperature control setpoints be

observed by doing any one of the following:

NOTE: The T7300F/Q7300H does not support Standby

mode.

—

Depressing the Temporary Occupied button on the

T7300F, or

—

Setting the DestManOcc network point to Bypass, or

Setting the DestBypass network point to ON.

Manual Override of occupancy mode can occur from three

sources and is governed by two selectable arbitration

schemes. The two schemes are: Network Wins or Last-in

Wins, (as set in OvrdPriority).

When activated, the thermostat remains in Bypass mode

until:

—

Bypass duration setting has timed out (BypTime), or

User presses the Run button on the T7300F to switch

off the Bypass mode, or

The three sources of manual override status are:

—

DestManOcc Possible states: Occupied,

Unoccupied, Bypass, Standby and Null (not active). If

Standby is received, it is ignored. This input source

has the highest priority in determining manual override

status for a Network Wins arbitration scheme, or in the

event there is more than one source change at a time

in the Last-in Wins arbitration scheme. Bypass

initiates a self-timed bypass of the control unit and

expires upon completion of the defined timed period.

The controller then treats the bypass status of this

input as Null until the next change in status.

DestBypass Possible states: Bypass On, Bypass Off

or Not Assigned (not active). This input places the

controller in an untimed bypass state or turns off the

bypass mode. This source is second in priority to

DestManOcc under the same arbitration schemes

mentioned above.

—

Occupancy schedule switches the mode to occupied,

User sets the DestManOcc network point to occupied,

or unoccupied.

BypassTime

BypassTime is the time between the pressing of the

override button at the wall module (or initiating bypass

mode via DestManOcc) and the return to the original

occupancy state. When the bypass state has been

activated, the bypass timer is set to BypTime (default of

—

80 min.).

NOTE: A Bypass mode initiated via DestBypass does not

cause the bypass timer to run. The DestBypass

signal source is assumed to be tracking the

The T7300F keypad (Temporary Occupied and

Continuous Unoccupied keys).

duration peiod using its internal bypass timer.

Demand Limit Control (DestDlcShed)

Override Priority

When the Q7300H receives a high-electrical-demand

signal, the controller applies a DlcBumpTemp amount to

the current actual space temperature setpoint value. The

setpoint is always adjusted in the energy-saving direction.

This means that if the T7300F is in cooling mode, the DLC

offset bumps the control point up and when in heating

mode, bumps the control point down.

A network bypass signal always has priority over local

pushbutton induced overrides. When DestManOcc is not

OC_NUL, then the effective occupancy is DestManOcc,

regardless of the T7300F keypad-initiated override state.

Continuous Unoccupied Mode

When returning from a DLC Shed event, the setpoint is

gradually ramped back to its original (unbumped) value

over a 30-minute period.

This mode is entered when the Continuous Unoccupied

button on the T7300F is pressed. This mode can also be

entered via a network command (DestManOcc set to

Unoccupied). If the controller is in this mode, it reverts to

the unoccupied setpoints for temperature control. The

thermostat remains in this mode indefinitely until the Run

button is pressed to exit the mode, or a network command

is sent to clear the mode.

Start-Up

START_UP_WAIT is the first mode after application restart

or power-up. During START_UP_WAIT, no control

algorithms are active.

Occupancy Mode Arbitration (StatusOcc)

NOTES:



After a controller commission via Excel LonSpec™,

the Q7300 is reset and an application restart occurs.

Not all network inputs can be received during the

START_UP_WAIT period because many network

variables are updated at a slower rate; therefore some

control decisions can be considered temporarily

inappropriate during START_UP_WAIT.

The T7300F/Q7300H has multiple sources for occupancy

schedule information and, therefore, it employs an

arbitration scheme to determine the current actual mode.

Time-of-day (TOD) schedule status comes from either one

of two sources:



—

Internal schedule contained in the T7300F, or

DestOccSchedule network input received from

another LonWorks device.

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