Honeywell T7300F, Q7300H User Manual 2

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T7300F/Q7300H Series 2000 Commercial

Thermostats and Communicating

Subbases

Contents

INTRODUCTION

CONSTRUCTION

APPLICATION STEPS

........................................................................................................................... 3

Description of Devices ....................................................................................... 3

Control Application............................................................................................. 3

Control Provided................................................................................................. 4

Product Names .................................................................................................. 4

Products Covered............................................................................................... 5

Organization of Manual...................................................................................... 5

Applicable Literature .......................................................................................... 6

Agency Listings.................................................................................................. 6

Abbreviations and Definitions............................................................................. 6

........................................................................................................................... 7

Performance Specifications ............................................................................... 8

Input/Output Summary .................................................................................. 8

Communications............................................................................................ 9

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

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

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

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

USER ADDRESS

NETWORK VARIABLES

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

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

See form number 63-4366, Q7300 Communicating Subbase System Integration User Address Manual.

63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

LIST OF FIGURES

LIST OF TABLES

Fig. 1. Typical T7300F/Q7300H LonWorks® network diagram.......................... 3

Fig. 2. Typical T7300F/Q7300H application....................................................... 4

Fig. 3. T7300F/Q7300H dimensions in in. (mm)................................................ 8

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

Table 1. Additional Products.............................................................................. 5

Table 2. Terminal descriptions and conditions................................................... 9

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

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T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

INTRODUCTION

Description of Devices

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

RS-232 SERIAL PORT

SLTA

1 4 8 12 16

EXCEL 15 W7760

17 23

Control Application

The T7300F/Q7300H Series 2000 Commercial 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,

16.

WALL MODULE

EXCEL 10 CVAHU

30 31

S7760

LonWorks® BUS

T7300

MODEM

Select

Back

MODEM

BUILDING MANAGER

1 4 8 12 16

RS-232 SERIAL PORT

SLTA

EXCEL 15 W7760

17 23

30 31

S7760

Select

Back

EXCEL 10 CVAHU

LonWorks® BUS

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

WALL MODULE

T7300

M16083B

3 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

SUBBASE

AS AS

DISCHARGE AIR SENSOR

1 2

3 4

COMPRESSOR CONTACTOR 2

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.

Y1 O G

COMPRESSOR CONTACTOR 1

COOL CHANGEOVER VALVE

EM. HT. RELAY

FAN RELAY

AUX. HEAT

HEAT CHANGEOVER VALVE

ECONOMIZER

Fig. 2. Typical T7300F/Q7300H application.

A2A1

C4 C3C5

CA4 CA3CA5

T7147 REMOTE COMFORT ADJUST MODULE

TRANSFORMER

CA2

L1 (HOT)

C1 T

CA1

GND

TEBEB

M16056

LonWorks® BUS

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 onsite 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.

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.

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.

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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-sta cool heat pump system.

Q7300H2011 Communicating subbase without O and

B terminals for three-sta stage cool heat pump system.

Q7300H2029 Communicating subbase for three-stage

heat, three-sta

e cool conventional

system.

Q7300H2037 Communicating subbase for two-stage

heat, one-sta

e 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.

e heat, two-stage

e heat, two-

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Products Covered

This System Engineering manual describes how to apply the T7300F Thermostat and Q7300H Communicating Subbase and related accessories to typical applications. Devices include:

T7300F Series 2000 Commercial Thermostat. Q7300H Series 2000 Communicating Subbase. Excel 15 W7760A Building Manager.

Excel 10 Controllers, as follows:

W7750A,B Constant Volume Air Handler Unit (CVAHU)

Controller.

W7761 Remote Input/Output (RIO) Controller.

Other products:

Q7751A,B Bus Router. Q7760A Serial LonTalk Adapter. Q7740A,B FTT Repeaters. 209541B FTT Termination Module.

See Table 1 for additional products.

Table 1. Additional Products.

Part Number Product Description Comments

R8242A Contactor, 24 Vac coil, DPDT. — AT72D, AT88A, etc. Transformers. — 4074EYD Wallplate for T7770 Wall Modules. For covering an existing hole in a

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

Honeywell (US only) AK3791 (one twisted pair) AK3792 (two twisted pairs).

Honeywell (US only) AK3781 (one twisted pair) AK3782 (two twisted pairs).

Honeywell AK3725 (US only), typical or equivalent.

Honeywell AK3752 (US only), typical or equivalent.

Honeywell AK3702 (US only), typical or equivalent.

Honeywell AK3712 (US only), typical or equivalent.

Honeywell AK3754 (US only), typical or equivalent.

female DB-25. LonWorks® Bus (plenum): 22 AWG (0.325 sq mm)

twisted pair solid conductor, nonshielded or Echelon approved shielded cable.

LonWorks® Bus (nonplenum): 22 AWG (0.325 sq mm) twisted pair solid conductor, nonshielded or Echelon approved shielded cable.

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

Outputs/Power: 14 to 18 AWG (2.0 to 1.0 sq mm). NEC Class 2, 140°F (60°C) rating.

18 AWG (1.0 sq mm) twisted pair. Non-plenum.

16 AWG (1.3 sq mm) twisted pair. Non-plenum.

14 AWG (2.0 sq mm) two conductor. Non-plenum.

Organization of Manual

This manual is divided into four basic sections:

Introduction

T7300F/Q7300H, discusses related devices, lists additional literature, and provides a glossary of abbreviation and terms.

Construction

network connections and dimensions.

Application Steps

provides the information necessary to plan and lay out the T7300F/Q7300H application and accurately order materials.

Appendix

operations for configuring network controllers.

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.

. Provides an overview of the

. Describes T7300F/Q7300H features,

. A step-by-step procedure that

. Appendix A provides a sequence of

wall. Obtain locally from any computer

hardware vendor. Level IV, 140°F (60°C) rating.



Level IV, 140°F (60°C) rating.



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T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Applicable Literature

The following list of documents contains general information related to the T7300F/Q7300H Series 2000 Commercial Thermostats and Communicating Subbases.

Form No. Title

62-0125 T7300F Series 2000 Commercial

Microelectronic Conventional or Heat Pump Thermostat Installation Instructions

62-0155 Q7300H Series 2000 Commercial

Thermostat Installation Instructions 74-2976 Excel LonSpec™ Specification Data 74-2977 Excel LonSpec™ Software Release

Bulletin 74-2937 Excel LonSpec™ User’s Guide 74-2982 Light Commercial Building Solutions

System Specification Data 74-2865 E-Bus Wiring Guidelines User’s Guide 74-2967 Excel 15 W7760A Building Manager

Specification Data 95-7565 Excel 15 W7760A Building Manager

Installation Instructions 74-2969 Excel 15 W7760A Building Manager

System Engineering 74-2956 Excel 10 W7750A,B CVAHU Controller

Specification Data 95-7521 Excel 10 W7750A,B CVAHU Controller

Installation Instructions 74-2958 Excel 10 W7750A,B CVAHU Controller

System Engineering 74-2698 Excel 10 W7761A RIO Controller

Specification Data 95-7539 Excel 10 W7761A RIO Controller

Installation Instructions 74-2699 Excel 10 W7761A RIO Controller System

Engineering 74-2697 T7770A, B, C, D, E, F, G Wall Module

Specification Data 95-7538 T7770A, B, C, D, E, F, G Wall Module

Installation Instructions 95-7554 209541B Termination Module Installation

Instructions

ABBREVIATIONS AND DEFINITIONS

Application Binding

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 information is saved in the network image of each neuron.

Building Manager

be used to monitor and control HVAC equipment and other miscellaneous loads in a distributed network.

Command Display

and change parameters.

Control Loop

function in a node that includes processes, loops and programs. A node can contain one or more control loops. (In Excel 10 class devices, the control loop occupies the entire node.)

CVAHU

Controller.

Excel 10s

controllers such as the Excel 10 CVAHU and Excel 10 RIO.

HVAC I/O

—Input/Output.

LonWorks® Network

communicating with each other using the LonTalk® protocol.

Mandatory Mechanisms/Objects/Network Variables

Mandatory mechanisms and network variables that are implemented in all the Excel 10 devices.

NamedObject

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.

Network Management Node

responsible for configuring the network, installing the nodes, binding the network variables between nodes, and general network diagnostics.

—A specific Building Control function.

—The process of logically connecting network

—A LonMark® certified device that can

—A device that can be used to monitor

—A primitive control function. A type of

—Excel 10 Constant Volume Air Handler Unit

—A family of application - specific HVAC

—Heating, Ventilating and Air Conditioning.

—A data network based on neurons

—

—Objects that have names are called

—A LonWorks® node that is

Agency Listings

European Community Mark (CE): Conforms to requirements of European Consortium Standards.

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T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Network Variables

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).

Node

—A device implementing layers one through six of the LonTalk® protocol including a Neuron® Chip, transceiver, memory, and support hardware.

Notebook PC 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.

Programmable Controller

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.

Recovery Mode or Recovery Period

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.

—A class of variables defined in

—Portable personal computer.

—

—A controller that has a

—The time in

RIO

—Excel 10 Remote Input/Output device.

RTC

—Real Time Clock.

Schedule

states, setpoints and the time of the changes between these states.

SGPU

Periodic Update.

SGPUC

Periodic Update with Change Field.

SLTA

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

SNVT SCPT

—The structure that defines the occupancy

—Significant Event Notification and Guaranteed

—Serial LonTalk® Adapter. Adapts the transformer

—Standard Network Variable Type. —Standard Configuration Parameter Type.

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.

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 2 in. x 4 in. junction box.

Fig. 3 shows T7300F/Q7300H dimensions.

7 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

6-11/16 (170)

7-5/16 (186)

3-3/16 (77)

1-3/8 (35)

1/16 (2)

1-7/8

(47)

4-1/8 (105)

7/8

(22)

1-11/16

(43)

Occupied Start Time

Day/Time

Set Program

Unoccupied

Start Time

Clear

Start Time

Day

Copy

Run

Program

Temporary Occupied

Continous

Unoccupied

Set Current

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

Performance Specifications

Electrical Ratings:

Power: 20 to 30 Vac, 50/60 Hz. System Current: 6 VA maximum at 30 Vac, 50 or 60 Hz.

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).

Set Temperature

Occupied

Temp

System

Unoccupied

Temp

Heat/Cool

Settings

Fan

Change

Time/Temp

4-5/8 (117)

Differential:

2°F (1°C).

Humidity Ratings:

5% to 90% RH, noncondensing.

Input/Output Summary:

Table 2 summarizes the T7300F/Q7300H Thermostat/Subbase inputs and outputs.

M16086A

63-4365 8

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

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

AS,AS C7150B Discharge Air Sensor connection. Input —

B Heating changeover valve. Output 24V powered

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

C1, C2, C3, C4, C5 Communication input for T7147. Input/Output Low power

E Emergency heat relay. Output 24V powered

EB, EB LonWorks® Bus connection to LonWorks® network. Input/output Communications

FC Fan control transformer. Input —

G Fan relay. Output —

GH High speed fan output. Activated during call for cooling. Output —

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

O Cooling changeover valve. Output —

P1, P2 Pump interlock relay. Operates circulator pump in hydronic heat

R 24V system transformer. Input — RC 24V cooling transformer. Input — RH 24V heating transformer. Input — RM ML7984 Actuator connection. No call for heat; valve closed. Call

T, T Remote sensor input for T7047 or T7147. Input —

W1 Stage 1 heating relay or auxiliary heat relay. Output — W2 Stage 2 heating relay Output — W3 Stage 3 heating relay Output —

X Heating transformer common. Input —

Y Cool call. 24V output on Y —

Y1 Stage 1 compressor contactor. Output — Y2 Stage 2 cooling compressor (conventional). Stage 2

Y3 Stage 3 cooling compressor. Output —

69-1025-3, installer setup 18, for control parameters.

during occupied periods and open during unoccupied periods.

selection.

or energizes conventional heat system.

for sta stage 2 heat; valve fully open.

compressor contactor (heat pump).

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

Output Dry contract

contact

Output —

contact

Output —

Input, output —

Output —

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

verification and future expansion of the network. It also minimizes unknown or inaccurate wire run lengths, nodeto-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.

9 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Approved cable types for LonWorks® Bus 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

The Q7300H supports the LonMark® Functional Profile Number 8060,Thermostat Object (Type 09). See Fig. 4.

Hardware

Output

Thermostat Object

Type Number 09.

nv1

nviSetpoint SNVT_temp_p

Mandatory Network Variables

nvoHeatOutput

nv2

SNVT_ lev_percent nvoCoolOutput

nv3

SNVT_ lev_percent nvoSpaceTemp

nv4

SNVT_ temp_p nvoUnitStatus

nv5

SNVT_hvac_status

NOTE: For additional information on the LonMark®

Functional Profile, see the LonMark® Application Layer Interoperability Guidelines and the 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.

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 — Current setpoint — Occupied/Unoccupied schedule commands — Current occupancy status — Relay status (heat/cool stages and fan) — Alarm status — Alarm log

A network configuration tool is used to configure Q7300Hs and other nodes with which the Q7300H interacts.

nviSpaceTemp

nv6

SNVT_ temp_p nviOccCmd

nv7

SNVT_occupancy

nviApplicMode

nv8

SNVT_hvac_mode

nviSetptOffset

nv9

SNVT_ temp_p

nviEnergyHoldOff

nv10

SNVT_switch

Optional Network Variables

nvoTerminalLoad

nv11

SNVT_ lev_percent

nvoEffectSetpt

nv12

SNVT_ temp_p nvoTerminalfan

nv13

SNVT_switch nvoEnergyHoldOff

nv14

SNVT_switch

Configuration Properties

nc49 - nciSndHrtBt nc48 - nciRcvHrtBt nc64 - nciMin Delta nc17 - neiLocation nc60 - nciSetPnts nc79 - nciUpSPHeat nc80 - nciLrSPHeat nc76 - nciUpSPCool nc77 - nciLrSPCool

SNVT_time_sec SNVT_time_sec SNVT_temp_p SNVT_str_asc SNVT_temp_setpt SNVT_temp_p SNVT_temp_p SNVT_temp_p SNVT_temp_p

(mandatory)

(optional) (optional) (optional)

(mandatory)

(optional) (optional) (optional) (optional)

Manufacturer

Defined Section

Hardware

Input

M16087A

Fig. 4. Functional Profile Number 8060LonMark®

Thermostat Object (Type 09).

(Thermostat profile variables not used are grayed).

The following is a brief description of the configurable features that can be commanded over the network:

•

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

LOC

controlled T7300F LED displays

•

System Switch Settings:

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: 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.

•

Current Setpoint: If a valid setpoint value is received at Q7300H DestSetPoint, that value will be used by the Q7300H as

center

the

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.

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T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

•

Schedule: 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

LOC

keypad, and the LCD displays

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.

•

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 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.

•

Setpoint Changes: 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).

•

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 12 hours. If a change from occupied to unoccupied is 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.

APPLICATION STEPS

Overview

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.

Table 3. Application Steps.

Step Description

1 Plan the system. 2 Determine required network devices. 3 Lay out communications and power wiring. 4 Prepare wiring diagrams. 5 Order equipment. 6 Configure T7300F/Q7300H. 7 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.

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.

NOTEBOOK PC

SHIELDED INTERFACE

RS-232 SERIAL PORT

CABLE

Q7760 SLTA

CABLE PART NO. 205979

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. 6 through 10 in Application Step 4. Prepare Wiring Diagrams, for wiring details.

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.

T7300

LonWorks BUS PORT

M10102B

11 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Step 2. Determine Required Network Devices

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.

Multiple operator terminals can be connected to the LonWorks Bus at the same time. Table 4 summarizes the LonWorks Bus segment configuration 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.

In addition, a 209541B Termination Module may be required. Refer to the E-Bus Wiring Guidelines, form 742865, 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.

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.

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.

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 Controller Nodes 60

Maximum number of Excel 10s 60 nodes (minus number of Excel 15s) Maximum number of Excel 15s 4 nodes

Total 60 nodes maximum

Two LonWorks Bus Segments;

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 24 nodes Maximum number of Excel 10s (20 per each Excel 15) 112 nodes (minus number of RIOs)

Two LonWorks Bus Segments;

Controllers, more than 60 devices

One Q7751A,B Router 2 nodes Maximum number of Excel 10s (60 per segment) 120 nodes

with

without

Excel 15

Maximum Number of Controller Nodes 112, plus two

nodes for router access.

Total 122 nodes maximum

Maximum Number of Controller Nodes 120, plus two

nodes for router access.

Total 122 nodes maximum

63-4365 12

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

NOTEBOOK PC

MODEM

209541B TERMINATION MODULE

T7300

T7300 T7300 T7300

RS-232

SLTA

LonWorks® BUS

T7300

MODEM

RS-232

SLTA

LonWorks® BUS

T7300 T7300 T7300 T7300

RS-232

SLTA

LonWorks® BUS

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

LonWorks® BUS SEGMENT NUMBER 1

EXCEL 10

EXCEL 10 CVAHU

T7770

CVAHU

T7300

M16063A

EXCEL 10 CVAHU

209541B TERMINATION MODULE

LonWorks

LonWorks® BUS SEGMENT NUMBER 2

BUILDING MANAGER

1 4 8 12 16

EXCEL 15 W7760

30 31

17 23

T7300 T7300

BUS ACCESS

LonWorks® BUS SEGMENT NUMBER 2

EXCEL 10 CVAHU

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

Q7751A FTT E-BUS ROUTER

209541B TERMINATION MODULE

EXCEL 10 CVAHU

M16084C

13 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

LonWorks® BUS

EXCEL 10 CVAHU

T7770

EXCEL 10 RI0

EXCEL 10 CVAHU

BUILDING MANAGER

1 4 8 12 16

EXCEL 15 W7760

30 31

17 23

EXCEL 10 RI0

LonWorks® BUS I/O CONNECTIONS

T7770 WITH NO LonWorks® BUS ACCESS

M16085B

T7300

EXCEL 10 CVAHU

T7770

209541B TERMINATION MODULES (AT ENDS OF LonWorks® BUS DAISY-CHAIN)

T7300 T7300

EXCEL 10 RI0

T7770

JACK FOR OPERATOR TERMINAL

T7300

EXCEL 10 RI0

BUS

LonWorks

LonWorks® BUS

EXCEL 10 RI0

T7770

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 Termination Module to connect two of the three termination module wires to the LonWorks Bus terminals.

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.

C1 C2 C3 C4 C5

BROWN

ORANGE

EB EB

YELLOW

XTTASAS

PART NO. 209541B TERMINATION MODULE

M16202

Fig. 9. Singly terminated LonWorks Bus termination

module.

63-4365 14

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

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 Termination Module Installation Instructions, form 95-7554.

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.

NOTE: After wiring, check that all connections are tight

and secure. See Fig. 11. Loose or intermittent wire connections can cause inconsistent system operation.

C1 C2 C3 C4 C5

EB EB

ORANGEBROWN

YELLOW

EB EB

ORANGEBROWN

YELLOW

XTTASAS

PART NO. 209541B TERMINATION MODULE

C1 C2 C3 C4 C5

XTTASAS

PART NO. 209541B TERMINATION MODULE

Fig. 10. Doubly terminated LonWorks Bus

termination modules.

M16122

FOR STRAIGHT

FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM).

INSERTION STRIP 5/16 IN. (8 MM).

M4826

Fig. 11. Proper wiring technique.

Wiring Details

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 0443164151, 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.

WIRES TO ALL INPUTS AND OUTPUTS

WIRES TO Q7300H COMMUNICATING SUBBASE

WIRES TO ALL INPUTS AND OUTPUTS

CAUTION

Electrical Shock Hazard. Power supply can cause electrical shock.

Disconnect power supply before beginning installation.

Loosen the terminal screws on the subbase and

connect the system wires. See Fig. 11.

IMPORTANT

Use 18-gauge, solid-conductor color-coded thermostat cable for proper wiring. If using 18gauge stranded wire, do not use more than two wires. Do not use larger than 18-gauge wire.

M10886A

WIRES TO Q7300H COMMUNICATING SUBBASE

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

inputs and outputs.

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.

15 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

SUBBASE

AS AS

DISCHARGE AIR SENSOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

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.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

Y1 G

X R

COMPRESSOR CONTACTOR 1

FAN RELAY

COMPRESSOR CONTACTOR 2

EM. HT. RELAY

W3E

HEAT RELAY 3

HEAT RELAY 2

HEAT RELAY 1

ECONOMIZER

A2 A3A1

C4 C3C5

CA4 CA3CA5

T7147 REMOTE COMFORT ADJUST MODULE

TRANSFORMER

CA2

C1 T

CA1

L1 (HOT)

GND

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

(without O/B terminals).

SUBBASE

AS AS

Y1 O G

A2A1

C4 C3C5

C1 T

EB EB

LonWorks® BUS

M16057

TEBEB

AUX.

FAN RELAY

HEAT

HEAT CHANGEOVER VALVE

ECONOMIZER

CA1

CA4 CA3CA5

T7147 REMOTE COMFORT ADJUST MODULE

TRANSFORMER

CA2

L1 (HOT)

GND

M16056

LonWorks® BUS

DISCHARGE AIR SENSOR

1 2

3 4

COMPRESSOR CONTACTOR 2

COMPRESSOR CONTACTOR 1

COOL CHANGEOVER VALVE

EM. HT. RELAY

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

63-4365 16

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

SUBBASE

Y1 G X

AS AS

DISCHARGE AIR SENSOR

RC RH

COMPRESSOR CONTACTOR 1

FAN RELAY

L1 (HOT)

COOLING TRANSFORMER

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

JUMPER RC TERMINAL TO RH TERMINAL WHEN INSTALLED ON A SYSTEM WITH ONE 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.

COMPRESSOR CONTACTOR 2

COMPRESSOR CONTACTOR 3

HEAT RELAY 3

W3Y3

HEAT RELAY 2

HEAT RELAY 1

3 A2 A3A1

ECONOMIZER

4 5

CONNECT GND TO EARTH GROUND. USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

C4 C3C5

CA4 CA3CA5

T7147 REMOTE COMFORT ADJUST MODULE

L1 (HOT)

HEATING TRANSFORMER

CA2

C1 T

CA1

GND

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

SUBBASE

EB EB

LonWorks® BUS

M16058

GND

EB EB

LonWorks® BUS

M16059

GL GH R

AS AS

DISCHARGE AIR SENSOR

FC Y

LOW SPEED FAN RELAY

L1 (HOT)

FAN TRANSFORMER

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

CONNECT GND TO EARTH GROUND.

SEE TABLE 2 FOR VALVE AND VALVE ACTUATOR MODELS.

HIGH SPEED FAN RELAY

ML7984 VALVE ACTUATOR

COOLING RELAY

PUMP INTERLOCK RELAY

A2A1P1 P2BM

DAMPER CONTROL RELAY

C4 C3C5

CA4 CA3CA5 T7147 REMOTE COMFORT ADJUST MODULE

TRANSFORMER

L1 (HOT)

C1 T

CA1 TCA2

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

17 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

g g

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.

Wire

Function

Thermostat wire.

LonWorks Bus (NonPlenum).

Power Wiring.

Recommended

Wire Size

(Minimum) Construction

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

Outputs/Power: 14 to 18 AWG (2.0 to

1.0 sq mm).



22 AWG (0.34 sq mm)

14 AWG (2.0 sq mm)

Standard thermostat wire.

NEC Class 2, 140°F (60°C) rating.

Twisted pair solid conductor, nonshielded or Echelon® approved cable.

Any pair nonshielded (use heavier wire for longer runs).

Specification

or Requirement Vendor Wire Type



Level IV, 140°F (60°C) rating.

NEC Class II, 140°F (60°C) rating.

Honeywell AK3725 (US only), typical or equivalent.

Honeywell AK3752 (US only), typical or equivalent.

Honeywell AK3781 (one twisted pair), AK3782 (two twisted pair).

Honeywell AK3754 (14 AWG) twisted pair), AK3909 (14 AWG) sin conductor or equivalent.

Distance

(Maximum)



Refer to E-bus Wirin Users Guide 74-2865-1 for maximum length.

Limited by line-loss effects on power consumption.

uidelines

63-4365 18

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 Product Description Comments

Q7300H2003 Communicating subbase with O and B

Q7300H2011 Communicating subbase without O and B

Q7300H2029 Communicating subbase for three-stage

Q7300H2037 Communicating subbase for two-stage heat,

T7300F2002 Series 2000 Commercial Electronic

T7300F2010 Series 2000 Commercial Electronic

W7750A,B Excel 10 Constant Volume Air Handler Unit. Single-speed fan provides continuous supply air

W7761A Excel 10 Remote Input/Output Device. Service messaging feature identifies physical

— Serial Interface Cable, male DB-9 to female

Honeywell (US only) AK3791 (one twisted pair) AK3792 (two twisted pairs).

Honeywell (US only) AK3781 (one twisted pair) AK3782 (two twisted pairs).

Honeywell AK3725 (US only), typical or equivalent.

Honeywell AK3752 (US only), typical or equivalent.

Honeywell AK3702 (US only), typical or equivalent.

Honeywell AK3712 (US only), typical or equivalent.

Honeywell AK3754 (US only), typical or equivalent.

terminals for three-sta heat pump system.

heat, three-stage cool conventional system.

one-sta valve two-position heat output.

Thermostat without system and fan switching.

Thermostat with system and fan switching.

DB-9 or female DB-25. LonWorks Bus (plenum): 22 AWG

(0.325 sq mm) twisted pair solid conductor, nonshielded or Echelon approved shielded cable.

LonWorks Bus (nonplenum): 22 AWG (0.325 sq mm) twisted pair solid conductor, nonshielded or Echelon approved shielded cable.

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. Non-plenum.

16 AWG (1.3 sq mm) twisted pair. Non-plenum.

14 AWG (2.0 sq mm) two conductor. Non-plenum.

e cool conventional system with

e heat, two-stage cool

Includes AS terminals for optional dischar sensin economizer.

Includes AS terminals for optional discharge air sensin economizer.

Includes AS terminals for optional dischar sensin economizer.

Use with Q7300H Communicatin network communications.

Use with Q7300H Communicating Subbase for network communications.

to designated area.

location of specific Excel 10s on network. Obtain locally from any computer hardware

vendor. Level IV, 140°F (60°C) rating.

Level IV, 140°F (60°C) rating.

Standard thermostat wire.

NEC Class 2, 140°F (60°C) rating.

; A1, A2, A3 terminals for optional

Subbase for

e air

19 63-4365

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

Step 6. Configure T7300F/Q7300H

Use Excel LonSpec™ Software to configure the T7300F/Q7300H Thermostat/Subbase for specific applications. The Excel LonSpec™ User’s Guide, form 742937, provides software operation instructions for the personal computer.

Step 7. Troubleshooting

Check for 24 Vac power.

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.

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,

sure to remove power from the device 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.



O/B Terminals. The Q7300H2003 provides O/B terminals for cool/heat changeover.

NOTE: All wiring must comply with applicable electrical

codes and ordinances or as specified in installation wiring diagrams.

first

before

APPENDIX A: SEQUENCE OF OPERATIONS

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.

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

communicated to the Q7300H). The Room Temperature 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 the resulting value supplied to the temperature control routine.

NOTE: A physical sensor (either local or remote)

be averaged with a network sensor. A valid value for the network sensor input gives the network sensor priority over any locally-wired sensors.

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.

averaged

cannot

and

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

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.

Network Setpoint Offset (DestSptOffset)

This is a setpoint adjustment signal sent from another LonWorks device. When received, it is used to current setpoint value up or down. The amount of the bump is the value of DestSptOffset itself. The actual setpoints are found as follows:

ActualSetpoint = CurrentSetPoint + DestSptOffset

During unoccupied times, the network setpoint offset value is not referenced, and the programmed setpoints are used instead (CoolUnoccSpt and HeatUnoccSpt).

bump

the

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.

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T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

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: — Depressing the Temporary Occupied button on the

T7300F, or — Setting the DestManOcc network point to Bypass, or — Setting the DestBypass network point to ON.

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 — Occupancy schedule switches the mode to occupied,

or — 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 180 min.).

NOTE: A Bypass mode initiated via DestBypass does

cause the bypass timer to run. The DestBypass signal source is assumed to be tracking the duration peiod using its internal bypass timer.

not

Override Priority

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

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.

Occupancy Mode Arbitration (StatusOcc)

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.

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.

not

NOTE: The T7300F/Q7300H does

mode.

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).

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.

— The T7300F keypad (Temporary Occupied and

Continuous Unoccupied keys).

support Standby

Demand Limit Control (DestDlcShed)

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.

When returning from a DLC Shed event, the setpoint is gradually ramped back to its original (unbumped) value over a 30-minute period.

Start-Up

START_UP_WAIT is the first mode after application restart or power-up. During START_UP_WAIT, no control algorithms are active.

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.

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Honeywell T7300F, Q7300H User Manual 2

Specifications and Main Features

Frequently Asked Questions

User Manual