Honeywell T7350 User Manual

4 (1)

T7350

Commercial Programmable Thermostat

 

SYSTEM ENGINEERING

 

Contents

Introduction ..................................................................................................................................

2

Device Description ..............................................................................................

2

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

2

Network Control Provided ...................................................................................

3

Models ..................................................................................................................................

3

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

3

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

4

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

4

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

5

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

7

LONMARK® Functional Profile ..............................................................................

8

Network Configurations ..................................................................................................................................

9

Application Steps ..................................................................................................................................

10

Overview .............................................................................................................

10

Step 1. Plan the System ......................................................................................

11

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

11

Step 3. Layout Communications and Power Wiring: ..........................................

11

LONWORKS® Bus Layout ......................................................................................

11

Cable Termination ...............................................................................................

12

Wiring Details ......................................................................................................

12

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

12

General Considerations .......................................................................................

15

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

17

Step 6. Configure T7350 .....................................................................................

17

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

18

Appendix A - Network Tools & Workstations .........................................................................................................................

20

Appendix B - Network Alarm Reporting ..................................................................................................................................

21

Appendix C - Network Error Reporting ...................................................................................................................................

23

Appendix D - Network Access to Local Sensor Data .............................................................................................................

25

Appendix E - Scheduling Network Devices ............................................................................................................................

25

Appendix F - Network Master Clock ........................................................................................................................................

25

Appendix G - Network Connections to Other LCBS Devices ................................................................................................

26

Appendix H - T7350H Network Variable Summary .................................................................................................................

34

® U.S. Registered Trademark

 

© 2004 Honeywell International Inc.

63-4368

All Rights Reserved

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

INTRODUCTION

Device Description

The T7350H is a LONMARK® certified thermostat that provides networking capability in a LONWORKS® system using a transformer-coupled Free Topology Transceiver (FTT). See Fig. 1.

The T7350H communicates with many LONMARK® devices including the following:

Other T7350H Communicating Commercial Thermostat devices.

T7300F/Q7300H Commercial Thermostat/Communicating Subbase.

Excel 15 S7760A Command Display.

Excel 10 W7750A,B,C Constant Volume Air Handler Unit (CVAHU) Controller.

Excel 15 W7760A, B, C Building & Plant Managers.

Excel 10 W7751B, D, F, H, J Variable Air Volume Terminal Unit Controllers.

Excel 10 W7752D, E, F, G Fan Coil Unitcontrollers.

Excel 10 W7753A Unit Ventilator Controller.

Excel 10 W7762A,B Hydronic Controllers.

Excel 10 W7763C, D, E Chilled Ceiling Controllers.

Control Application

The T7350H programmable communicating Thermostat controls commercial single zone heating, ventilating and air conditioning (HVAC) equipment through staged and modulating outputs. The T7350H consists of a two piece assembly with a thermostat cover and subbase. The thermostat cover includes the keypad and display for 7-day programming. Calendar programming is available through a direct connect PDA (Configuration Tool) or network (LONSPEC™ with model T7350H) tool configuration. The subbase includes equipment control, inputs and network connections. The subbase mounts on the wall and the thermostat cover mounts to the subbase. In addition, the T7350H model can communicate local sensor data, schedule information, master clock operations and accept configuration and override instructions to or from other devices/tools in a LONWORKS® network. Fig. 9 shows a typical T7350H application in a three-stage heat and two-stage cool heat pump system. For additional hookups, see Fig. 10 through 12.

BUILDING MANAGER

WALL MODULE

NOTEBOOK PC

1 4

8

12

16

 

EXCEL 15

 

 

EXCEL 10

W7760

 

 

 

 

 

 

 

 

 

 

 

 

 

CVAHU

17

23

30

31

37

44

 

RS-232

 

 

 

 

 

 

SERIAL

 

 

 

 

 

 

PORT

 

 

 

 

 

 

SLTA

 

 

 

 

LonWorks

BUS

 

 

 

 

S7760

T7350H

 

 

 

 

 

Back

Select

MODEM

RS-232 MODEM SERIAL

PORT

BUILDING MANAGER

WALL MODULE

 

1 4

8

12

16

 

EXCEL 15

 

 

 

EXCEL 10

W7760

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CVAHU

17

23

30

31

37

44

 

SLTA

 

 

 

 

S7760

LonWorks BUS

 

 

 

 

 

T7350H

Back

Select

M22490

Fig. 1. Typical T7350H LONWORKS® network diagram.

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2

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Network Control Provided

The T7350H communicates with other network devices, or nodes, for sharing data such as local inputs. Through the network, a Command Display (S7760) is used to view or modify T7350H operational modes including:

Weekly Schedule.

Holiday Schedule.

Room Temperature SetPoints (Occupied, Unoccupied, Standby).

Manual Occupancy Override.

Temperature Setpoints.

Update Time Clock.

Network connected Workstations and Configuration Tools are used to view and modify additional T7350 operational modes:

Command Fan operating mode (On, Auto)

Command Application mode (Auto, Off, Heating, Cooling)

By using network messaging, the T7350H may share the following local inputs with other T7350, T7300/Q7300, XL15 or XL10 network connected devices:

Room Humidity and Temperature.

Outdoor Air Temperature.

Occupancy Sensor.

Unoccupied Bypass User Input.

Network messaging also supports distribution of local user commands and operational states from a single T7350H. That is, network connected T7350H and XL10 devices can be configured to follow the local user commands and states from a single (master) T7350H. These local T7350 commands include the following:

Application mode (Auto, Off, Heating, Cooling).

Occupancy (Occupied, Unoccupied, Bypass, Standby).

Bypass (unoccupied override).

Setpoint.

Time synchronization from a T7350H designated as network master clock.

Master Time Scheduling of Occupied, Unoccupied and Standby states.

MODELS

Table 1. T7350 Communicating Thermostat Models.

 

 

Maximum

 

 

 

Stagesa

 

Model

Applications

 

 

Features

Heat

Cool

T7350H1009

Conventional

3 (2)b

3 (4)b

Humidity, Occupancy,

 

or

 

 

Outdoor, Discharge Air

 

Heat Pump

 

 

Capability

T7350H1017

Modulating

2 modulating, 2c

Humidity, Occupancy,

 

 

relay

 

Outdoor, Discharge Air

 

 

 

 

Capability, 4-20 mA

 

 

 

 

output (2-10 Vdc with

 

 

 

 

500 ohm resistor)

aAll models are down-selectable and can be configured to control fewer stages than the maximum allowed.

bHeat pump applications for these models have a maximum of two heat stages and two cool stages.

cOne extra stage (of either heat or cool) can be configured using the auxiliary relay.

Products Covered

This System Engineering manual describes how to apply the T7350H Communicating Thermostat and related accessories to typical applications. Devices include:

T7350H Commercial Communicating Thermostat.

Excel 15 W7760A or B Building Manager.

Excel 15 W7760C Plant Manager.

Excel 10 Controllers including: W7750, W7751, W7752, W7753, W7762.

Other products:

Q7760A Serial LonTalk® Adapter.

Q7740A,B FTT Repeaters.

209541B FTT Termination Module.

See Table 2 for additional products.

Table 2. Additional Products.

Part Number

Product

Comments

Description

R8242A

Contactor, 24 Vac

 

 

coil, DPDT.

 

 

 

 

AT72D, AT88A …

24vac

 

 

Transformers.

 

 

 

 

T7770A-D

Wall Modules

 

 

 

 

T7771

Wall Module with

 

 

active display.

 

 

 

 

4074EYD

Wallplate for

For covering an

 

T7770 Wall

existing hole in

 

Modules.

a wall

 

 

 

AK3798

Single pair network

 

 

cable, U.L. Type

 

 

CMR

 

 

 

 

AK3797

Single pair network

 

 

cable plenum

 

 

rated, U.L. Type

 

 

CMP

 

 

 

 

AK3799

Double pair

 

 

network cable

 

 

plenum rated, U.L.

 

 

Type CMP

 

 

 

 

3

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Applicable Literature

The following list of documents contains general information related to the T7350H Communicating Commercial Thermostats.

 

Table 3. Applicable Literature

 

 

Form No.

Title

63-1299

T7350 Commercial Programmable

 

Thermostat Spec Data

 

 

62-0195

T7350 Commercial Programmable

 

Thermostat Installation Instructions

 

 

63-2605

T7350 Commercial Programmable

 

Thermostat Product Data

 

 

74-2976

Excel LONSPEC™ ZL7760A Specification

 

Data

 

 

74-2937

Excel LONSPEC™ ZL7760A User’s Guide

 

 

74-3123

Light Commercial Building Solution System

 

Communication Guide

 

 

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

 

 

63-2617

T7771 Wall Module Product Data

 

 

74-2972

S7760A Command Display Specification

 

Data.

 

 

74-2858

Q7740A,B FTT Repeater Specification

 

Data.

 

 

95-7555

Q7740A,B FTT Repeater Installation

 

Instructions.

 

 

74-2954

Q7760A SLTA-10 Serial LonTalk® Adapter

 

Specification Data.

 

 

95-7511

Q7760A SLTA-10 Serial LonTalk® Adapter

 

Installation Instructions.

 

 

95-7554

209541B Termination Module Installation

 

Instructions

 

 

ABBREVIATIONS AND DEFINITIONS

Application—A special use 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 Tool (such as

LONSPEC™) 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—A LONMARK® certified device that can be used to monitor and control HVAC equipment and other miscellaneous loads in a distributed network.

Command Display—A device that can be used to monitor data and change parameters of network connected devices.

CVAHU—Excel 10 Constant Volume Air Handler Unit

Controller.

Excel 10s—A family of application - specific HVAC controllers such as the Excel 10 CVAHU and Excel 10 VAV.

HVAC—Heating, Ventilating and Air Conditioning.

I/O—Input/Output.

LCBS—Light Commercial Building Solution. These systems are configured with the LONSPEC™ network tool and monitored with a Workstation such as LonStation®. Many LCBS networks include the W7760B & C plant managers. Routers (including Q7751A) are not supported by the LCBS network configuration LONSPEC™ tool.

LONSPEC™-ZL7760A—A network connected tool which configures, commissions, calibrates and monitors the Honeywell Light Commercial Building Solution Q7300, T7350H, Excel 10 and Excel 15 family of controllers.

LONSTATION—A low-cost, easy-to-use Light Commercial Building Solution workstation that provides advanced building control capabilities for small to medium-size buildings.

LONWORKS® Network—A data network based on neurons 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.

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 contained in devices such as the XL5a or XL15b.

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.

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4

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Network Variables—A class of variables defined in 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 a 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, a nv_update_occurs and the event is posted at the receiving node(s) so that the application program can take action based on the change. A network management node (for example XL15A or XL15C) 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).

Neuron—Refers to the Echelon® semiconductor device which implements the LONWORKS® protocol on a network connected device such as the T7350H Honeywell controller.

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

Notebook PC—Portable personal computer.

PDA—Personal Digital Assistant. In the case of the T7350 product this is a hand held electronic device operating with the Palm OS. A Honeywell provided PDA application program is used to configure the T7350 thermostat using a direct RS232 connection. Before purchasing a PDA, check the latest Configuration software release note for a list of qualified PDA models. Network connected T7350H models can be configured without a PDA using LONSPEC™.

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. Some examples of Honeywell programmable controllers include the XL15A and XL15B.

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.

RIO—Excel 10 Remote Input/Output device.

RTC—Real Time Clock.

Schedule—The structure that defines the occupancy states and the time of the changes between these states. In the case of the T7350, schedules are organized around a eight day weekly structure including an extra day for designated holidays. Holidays are scheduled by yearly calendar events.

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.

SNVT—Standard Network Variable Type.

SCPT—Standard Configuration Parameter Type.

XL15A—W7760A Honeywell building level controller.

XL15B—W7760B Honeywell building level controller.

XL15C—W7760C Honeywell plant level controller.

Performance Specifications

IMPORTANT

The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit might not exactly match listed specifications. This product is tested and calibrated under closely controlled conditions; minor performance differences can be expected if those conditions are changed.

Models: See Table 4.

Dimensions: See Fig. 2.

Finish (color): Trident White.

Batteries: No batteries required.

Table 4. T7350 Thermostat Features.

 

 

 

 

 

 

 

 

 

Maximum Stagesa

 

Auxiliary

LONWORKS®

Model

Applications

Heat

Cool

Features

Relay

Capability?

T7350H1009

Conventional

3 (2)b

3 (4)b

Humidity, Occupancy,

Isolated

Yes

 

or

 

 

Outdoor, Discharge Air Capability

Normally

 

 

Heat Pump

 

 

 

Open

 

T7350H1017

Modulating

2 modulating, 2c relay

Humidity, Occupancy,

 

Yes

 

 

 

 

Outdoor, Discharge Air Capability,

 

 

 

 

 

 

4-20 mA output (2-10 Vdc with 500 ohm resistor)

 

 

a All models are down-selectable and can be configured to control fewer stages than the maximum allowed. b Heat pump applications for these models have a maximum of two heat stages and two cool stages.

c One extra stage (of either heat or cool) can be configured using the auxiliary relay.

5

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Mounting Means:

Mounts on subbase. Subbase Mounts On:

Wall: Using two 5/8 in. long #6-32 screws (included). Outlet Box: Using sheet metal screws.

Throttling Range for Modulating Outputs:

Automatically adjusts based on heat/cool stages. Manually adjustable with PDA.

Clock Accuracy (at 77°F [25°C]): ±1 min./month (30 days).

Minimum Stage Operation Time (fixed):

Minimum On

Heat: 1 minutes. Cool: 3 minutes.

Minimum Off (Cool and Heat Pump): 1 minute.

Electrical Ratings:

Power: 24 Vac, 50/60 Hz.; 20 to 30 Vac, 50/60 Hz. Input:

Temperature: 20K ohms. Humidity: 0-10 Vdc. Outdoor: 3000 PTC. Discharge Air: 20K ohms.

Occupancy Sensor: Dry contact switching 30 Vdc at 1 mA. All Relay Outputs (at 30 Vac):

Running: 1.5A maximum. Inrush: 7.5A maximum.

Modulating Output: 4 to 20 mA with 510 ohm maximum terminating resistance.

System Current Draw (without load):

5 VA maximum at 30 Vac, 50/60 Hz.

NOTE: Relays are N.O. Single-Pole, Single-Throw (SPST).

Outdoor Sensor Wiring: Requires 18 gauge wire.

Humidity Ratings: 5% to 90% RH, noncondensing.

Emergency Heat Indication:

Display indicates when Emergency Heat is activated (Em).

Temperature:

Ratings:

Operating Ambient: 30°F to 110°F (-1°C to 43°C). Shipping: -30°F to +150°F (-34°C to +66°C).

Display Accuracy: ±1°F (±1°C). Setpoint:

Range:

Heating: 40°F to 90°F (4°C to 32°C). Cooling: 45°F to 99°F (7°C to 37°C).

Deadband: 2°F (1°C). Default Settings: See Table 5.

Loss of Power: The thermostat maintains programmed times and temperatures for the life of the product. Clock and day information is retained for a minimum of 48 hours.

NOTE: To achieve the 48-hour power-loss clock retention, the T7350 must be powered for at least 5 minutes.

Communicating Model T7350H:

Connection Terminals for the LONWORKS® Bus.

Network jack for quick access by personal computer based tools.

Communications service-pin pushbutton to simplify startup. LONMARK® Functional Profile: 8500_20 Space Comfort

Controller.

LONMARK® SCC Object Type: 8504 Rooftop See Fig. 3. LONMARK® Program Identifier: 80:00:0C:55:04:03:04:2E. LONMARK® Application Interoperability: version 3.3 Honeywell LONMARK® Plug-In file downloads:

http://plugin.ge51.honeywell.de/index.htm#

PDA System Requirements:

Palm OS: 3.5.x to 5.2.1

Dynamic Heap: 256K bytes.

Free RAM Space: 1000K bytes.

Serial Communications: RS232.

Approvals:

European Community Mark (CE) Listed. UL 873 Recognized, NEC Class 2. FCC Part 15 subpart J Class A.

cUL.

Table 5. Default Setpoints.

Control

Occupied

Not

Standby

Occupied

Heating

70°F (21°C)

55°F (13°C)

67°F (19°C)

Cooling

75°F (24°C)

85°F (29°C)

78°F (26°C)

 

 

 

 

Accessories:

Duct Discharge Air Sensors: C7041B (6 or 12 in.), C7041C (18 in.), C7041J (12 ft averaging), C7770A (8 in. probe).

Outdoor Air Sensors: C7089A, C7170A, C7031G2014 (weatherproof).

Temperature Sensors (Remote): C7772A, T7770A1006, T7770B1046, T7770C1044, T7770D1000, T7771.

Economizer Logic Modules: W6210, W6215, W7210, W7212, W7215, W7459.

Humidity Sensors: H7625A,B; H7635A,B,C, H7655B. PDA Units: Palm™ V, M125, and i705 handhelds;

TRGPro™ handheld; ZIRE™ 71 handheld; TUNGSTEN™ T handheld.

Others:

209541B FTT network termination module.

209651A Vertical Mounting Hardware Wallplate Adapter (Trident white).

50000083-001 Thermostat Interface Module (TIM).

50000452-001 Troubleshooting Cable.

AK3797 Single pair network cable plenum rated, U.L. Type CMP.

AK3798 Single pair network cable, U.L. Type CMR. AK3799 Double pair network cable plenum rated,

U.L. Type CMP.

Q7740A FTT network 2-way repeater. Q7740B FTT network 4-way repeater.

TG511, TG512 Universal Versaguard™ Thermostat guards.

63-4368

6

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

 

 

 

 

 

 

2-3/16 (56)

 

 

 

 

 

 

 

 

 

 

 

 

 

6-3/4 (171)

 

 

 

 

 

 

1-9/16

 

 

 

 

 

 

 

 

 

(40)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-1/2

(114)

SUBBASE

 

 

2-1/32

 

 

(52)

 

 

4-1/16

 

 

(104)

 

 

2-1/32

 

 

(52)

1-5/8

2-3/8 (60)

1-5/8

(42)

3-1/4 (83)

(42)

 

 

 

6-9/16 (166)

M22432

 

 

Fig. 2. Dimensions of thermostat and subbase in in. (mm).

Communications

The T7350H provides networking capability in a LONWORKS® system using a Free Topology Transceiver (FTT) transformercoupled 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, 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 742865, for a complete description of network topology rules and maximum network wire length. If longer runs are required, add a Q7740A 2-way or Q7740B 4-way repeater to extend the LONWORKS® Bus length. Q7751A routers are not supported on LCBS LONSPEC™ configured systems. 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 or stranded conductor wire. Refer to Table 2 for a list of Honeywell network cable part numbers. Other Echelon® approved cable may also be used. Run communications wiring in a conduit, if needed, with nonswitched 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.

7

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

LONMARK® Functional Profile

 

 

 

Hardware Output

 

 

 

 

 

 

 

 

 

 

 

 

Node

 

 

 

 

 

 

 

 

 

 

 

 

Object

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nv1

 

nviRequest

Mandatory

 

 

 

nvoStatus

 

nv2

 

 

 

 

SNVT_obj_request

Network

 

 

 

SNVT_ obj_status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Variables

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nv3

 

nviTimeSet

 

nv6

 

 

nvoFileStat

 

 

 

 

 

SNVT_ time_stamp

 

 

 

SNVT_file_status

 

 

 

 

 

 

 

 

 

 

nviFileReq

Optional

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nv5

 

Network

 

 

 

 

 

 

 

 

SNVT_file_req

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nv7

 

nviFilePos

Variables

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SNVT_file_pos

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Configuration Properties

 

 

 

nc1 - nciDeviceName

UCPTdevName

(manf specific)

 

 

 

nc2 - nciApplVer

UCPTapplVer

(manf specific)

 

 

 

 

 

 

 

 

 

 

 

 

nv9

 

nviInUse

 

nv11

 

nroT7350Ver

 

 

 

 

 

UNVT_inUse

 

 

 

 

 

UNVT_version

nv10

 

 

nviPgm

 

nv12

 

nroPgmVer

 

 

 

 

 

 

UNVT_pgmIn

 

 

UNVT_pgmId

 

 

 

 

Manufacturer

nv13

 

nvoPgm

 

 

 

 

 

 

 

 

 

 

Defined

 

 

 

 

UNVT_pgmOut

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Section

nv14

 

nvoTime

 

 

 

 

 

 

 

SNVT_time_stamp

 

 

 

 

 

 

nv15

 

nvoAlarmH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNVT_alarm

 

 

 

 

 

 

nv16

 

nvoAlarmStatus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNVT_alarmStatus

 

 

 

 

 

 

nv17

 

nvoAlarmLog

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNVT_alarmLog

 

 

 

 

 

 

nv18

 

nvoError

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNVT_error

 

 

 

 

 

 

 

 

 

 

 

 

 

Hardware Input

Hardware Output

SCC-Rooftop

Object Number 8504.

nv1

 

nviSpaceTemp

 

Mandatory

nv26

 

nvoSpaceTemp

 

SNVT_temp_p

 

 

SNVT_ temp_p

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Network

 

 

 

 

nvoUnitStatus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Variables

nv27

 

 

 

 

 

 

 

 

 

 

 

 

SNVT_hvac_status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nv2

 

nviSetpoint

 

 

nv28

 

 

nvoEffectSetpt

 

 

 

 

 

 

SNVT_ temp_p

 

 

 

 

SNVT_temp_p

nv5

 

nviOccSchedule

 

 

nv29

 

 

nvoEffectOccup

 

 

 

 

 

 

SNVT_tod_event

 

 

 

 

SNVT_occupancy

 

 

 

nviOccManCmd

 

Optional

 

 

 

 

nvoHeatCool

nv6

 

 

Network

nv30

 

 

 

 

 

SNVT_occupancy

 

Variables

 

 

 

 

SNVT_hvac_mode

nv7

 

nviOccSensor

 

nv34

 

 

nvoDischAirTemp

 

 

 

 

 

 

 

 

SNVT_occupancy

 

 

 

 

 

 

SNVT_temp_p

nv8

 

nviApplicMode

 

 

nv37

 

 

nvoTerminalLoad

 

 

 

 

 

 

 

 

SNVT_hvacMode

 

 

 

 

 

 

SNVT_lev_percent

nv19

 

nviOutdoorTemp

 

 

nv43

 

 

nvoSpaceRH

 

 

 

 

 

 

 

 

SNVT_Temp_p

 

 

 

 

 

 

SNVT_lev_percent

nv20

 

nviSpaceRH

 

 

nv45

 

 

nvoOutdoorTemp

 

 

 

 

 

 

 

 

SNVT_lev_percent

 

 

 

 

 

 

SNVT_temp_p

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Configuration Properties

 

 

 

nc1 - nciSndHrtBt

 

SNVT_time_sec

 

 

 

(mandatory)

 

 

 

nc4 - nciRevHrtBt

 

SNVT_time_sec

 

 

 

 

 

(optional)

 

 

 

nc2 - nciSetpoints

 

SNVT_temp_setpt

 

 

(mandatory)

 

 

 

nc6 - nciBypassTime

 

SNVT_time_min

 

 

 

 

 

(optional)

 

 

 

nciConfig

 

UCPTconfig

 

(manf specific)

 

 

 

nciConfigPts

 

UCPTconfigPts

 

(manf specific)

 

 

 

nciDayLghtSav

 

UCPTdaylightSav

 

(manf specific)

 

 

 

nciDaySchedule0

UCPTschedule0

 

(manf specific)

 

 

 

nciDaySchedule1

UCPTschedule1

 

(manf specific)

 

 

 

nciDaySchedule2

UCPTschedule2

 

(manf specific)

 

 

 

nciDaySchedule3

UCPTschedule3

 

(manf specific)

 

 

 

nciDaySchedule4

UCPTschedule4

 

(manf specific)

 

 

 

nciDaySchedule5

UCPTschedule5

 

(manf specific)

 

 

 

nciDaySchedule6

UCPTschedule6

 

(manf specific)

 

 

 

nciDaySchedule7

UCPTschedule7

 

(manf specific)

 

 

 

nciHolSched

 

UCPTholSched

 

(manf specific)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nv30

 

nviBypass

 

 

 

nv43

 

nvoBypass

 

 

 

 

 

 

 

SNVT_switch

 

 

 

 

 

 

 

SNVT_switch

nv31

 

nviFanAuto

Manufacturer

 

nv44

 

nvoOccSchedule

 

 

 

 

SNVT_switch

 

 

SNVT_tod_event

nv32

 

nviManValue

 

Defined

 

nv45

 

nvoOccSensor

 

 

 

 

 

 

Section

 

 

 

UNVT_manValue

 

 

 

SNVT_occupancy

nv34

 

nviDlcShed

 

 

 

nv46

 

nvoData1

 

 

 

 

 

 

UNVT_dlcShed

 

 

 

 

UNVT_data1

 

 

 

 

 

 

 

 

nv47

 

nvoData2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNVT_data2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hardware Input

M22431

Fig. 3. T7350H LONMARK® Space Comfort Controller Rooftop Object (8504) with Node Object.

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8

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

NETWORK CONFIGURATIONS

The T7350H 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:

Current year, month, day, hour, minute, second.

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

Current fan setting (ON, AUTO).

Space temperature.

Space relative humidity.

Discharge air temperature.

Outdoor air temperature.

Occupancy sensor status.

Terminal load.

Current setpoint.

Occupied/Unoccupied schedule commands.

Current occupancy status.

Occupancy schedule including current occupancy state, next state and time in minutes until next scheduled change of occupancy state.

Relay status (heat/cool stages and fan).

Alarm status.

Alarm log including the last five alarms.

Device Error status.

Bypass state (multiple XL10 devices follow the bypass operation of a master device).

A network configuration tool is used to configure the T7350H Thermostats and other nodes with which the T7350H interacts. The following is a brief description of the configurable features that can be commanded over the network:

Time Master:

When a T7350H is designated as the network time master, the current time of day and date is synchronized across the network every minute. The LONSPEC™ T7350H General Screen can be used to configure a T7350H as the Network Time Master. Whenever the time of day or date of the time master is changed, it automatically adjusts all the other network devices (T7350H, Q7300 & XL15A) bound to the time master. When a T7350H is controlled by a time master, the local day light saving schedule is disabled. The Day Light Saving option on all time master recipients should be disabled. This prevents erroneous time changes (local daylight savings switchover) during temporary network outages.

Source

Destination

T7350H.nvoTime

T7350H.nviTimeSet

or

or

XL15a.nvoTimeOut

XL15a.nviTimeIn

Q7300.nvoTime

Q7300.nviTime

 

 

Time Schedule:

The occupancy schedule used by a T7350H may reside locally in that device or remotely in another schedule device (T7350H, XL15a, XL15b or T7300/Q7300). Local schedules can be created and modified using the T7350H keypad, a direct connected PDA, a network connected configuration tool (LONSPEC™) or Command Display. External schedules can also be modified using the keypad of the master schedule device, or with a network connected configuration tool or Workstation. When a T7350H receives scheduling information over the network,

the user is not prevented from making local schedule changes at the recipient thermostat. Local schedule changes (at a recipient device) have no effect on the scheduling commands received from the master device. When a T7350H is designated as a master schedule device, it sends its schedule information (current state, next state, time until next change of state) to the appropriate T7350H(s) which, in turn, overrides any existing internal time schedule. The T7350H Thermostat can provide master scheduling information to multiple Excel 10 devices. One T7350H shares the schedule information (current state, next state, time until next change of state) with the designated Excel 10 devices.

Source

Destination

T7350H.nvoOccSchedule

T7350H.nviOccSchedule

or

or

XL15a.nvoTodEventCmd[i]

XL10.nviTodEvent

Q7300.nvoOccSchedulei

XL15c.nviTodEventIn[i]

 

 

System Mode Settings:

System mode settings (HEAT, COOL, AUTO, OFF, EM HEAT) can be commanded by a remote T7350H or other compatible XL10 device. A one to many network binding can be used to command multiple devices from a single unit. In addition, a network connected Workstation can be used to change the System Mode.

Command Source

Command Destination

T7350H.nvoHeatCool

T7350H.nviApplicMode

or Workstation

 

 

 

Fan Settings:

Fan settings (ON, AUTO) can be changed from a network connected Workstation.

Source

Destination

Workstation

T7350H.nviFanAuto

or Network Tool

 

 

 

Outdoor Air Temperature Sharing:

If a valid outdoor air temperature value is received at the T7350H OAT network variable input, that value will be used in the T7350H. The local OAT sensor of the T7350H is ignored until the network sensor fails.

Source

Destination

T7350H.nviOutdoorTemp

T7350H.nvoOutdoorTemp

or

or

XL10.nvoOdTemp

XL10.nviOdTemp

XL15c.nvoOdTemp

XL15c.nviOdTemp

 

 

Discharge Air Temperature Sharing:

The discharge air temperature value can be shared with other devices on the network. Note that the T7350H does not accept a network discharge air temperature input.

Source

Destination

T7350H.nvoDischAirTemp

XL15c.nviDATemp

 

 

Space Temperature Sharing:

If a valid space temperature value is received at the T7350H Space Temperature network variable input, that

9

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

value will be used in the T7350H as the primary controlled variable. The local space temperature sensor of the T7350H is ignored until the network sensor fails.

Source

Destination

T7350H.nvoSpaceTemp

T7350H.nviSpaceTemp

or XL10.nvoSpaceTemp

 

 

 

Space Humidity Sharing:

If a valid humidity value is received at the T7350H Space Humidity network variable input, that value will be used in the T7350H as the humidity control variable. The local space humidity sensor of the T7350H is ignored until the network sensor fails.

Source

Destination

T7350H.nvoSpaceRH

T7350H.nviSpaceRH

 

or XL15c.nviRARH

 

 

Current Setpoint Sharing:

If a valid setpoint value is received at T7350H nviSetpoint, that value will be used by the T7350H as the center setpoint. The heat and cool setpoints are then calculated from this value and are used in the T7350H as the occupied setpoints. During unoccupied periods, nviSetpoint is ignored.

Source

Destination

T7350H.nvoEffectSetpt

T7350H.nviSetpoint

or XL10.nvoEffectSetpt

 

 

 

Occupancy Sensor Sharing:

If a valid value is received at the T7350H occupancy sensor network variable input, that value will be used in the T7350H as the occupancy sensor. The local T7350H occupancy sensor is ignored until the network sensor fails.

Occupancy Bypass:

Any internal or external scheduled unoccupied state in the T7350H is overridden by a network occupancy bypass command. Bypass is a method to command unoccupied override over the network from another controller (typically a T7350H or XL10). The source controller manages the bypass timing.

Source

Destination

T7350H.nvoBypass

T7350H.nviBypass

or

 

XL10.nvoBypass

 

XL15a.nvoBypass[i]

 

XL15c.nvoBypass[i]

 

 

 

Manual occupancy:

Provides a method to command the occupancy state from a network workstation. Effective occupancy override works on a “last in wins” basis. That is, the last occupancy override command received from any source determines the override state. The workstation can command occupied, unoccupied, standby, bypass, or not active (null). There are several ways to return the device to normal schedule operation.

1.Power failure reset at the T7350H.

2.Workstation issues a “not active” (null) network command to T7350H.nviOccManCmd.

3.User activates “Temporary Occupied” button on the local keyboard. This can be followed by a “Run Schedule” local command.

4.If manual occupancy is commanded to bypass and the bypass timer times out.

Source

Destination

Workstation

T7350H.nviOccManCmd

Command Display

 

XL15b

 

 

 

Source

Destination

T7350H.nvoOccSensor

T7350H.nviOccSensor

or XL10.nvoSensorOcc

 

NetworkSensor

 

 

 

NOTE: The occupancy or motion sensor is active whenever the device is scheduled “Occupied” and a remote or network occupancy sensor is configured.

The T7350H effective occupancy is determined in Table 6.

Table 6. T7350H Effective Occupancy.

Schedule

Occupancy/Motion

Effective

Occupancy

Sensor Contact

Occupancy

Occupied

Open

Standby

Occupied

Closed

Occupied

 

 

 

Standby

NA

Standby

 

 

 

Unoccupied

NA

Unoccupied

 

 

 

APPLICATION STEPS

Overview

The application steps shown in Table 7 are guidelines for configuring the T7350H in a LONWORKS® Bus network and explain the network role of the T7350H.

 

Table 7. 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 T7350.

 

 

7

Troubleshooting.

 

 

63-4368

10

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Refer to the Light Commercial Building Solution System Communication Guide form 71-3123 and the E-Bus Wiring Guidelines, form 74-2865 for a complete description of network topology rules. Prepare Wiring Diagrams, for wiring details. Plan to configure each controller. Refer to the Excel LONSPEC™ User Guide, form 74-2937, to configure the T7350H, XL15 and XL10 Controllers.

Step 1. Plan the System

Plan the use of the T7350H Thermostat according to the job requirements. Determine the location and functionality of each device. 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 T7350H

CABLE

RS-232

SERIAL Q7760

PORT SLTA

CABLE

PART

NO. 205979 LonWorks

BUS PORT

M22492

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. A router or repeater allows up to 120 controller nodes per network, divided between two LONWORKS® Bus segments. Please note that routers are not supported by the LCBS LONSPEC™ system configuration tool. Refer to the Light Commercial Building Solution System Communication Guide form 71-3123 for LCBS details. Refer to the E-Bus Wiring Guidelines, form 74-2865, for a complete description of network topology rules and maximum wire lengths. A 209541B Termination Module may be required. Refer to the Excel 10 FTT Termination Module Installation Instructions form, 95-7554.

Step 3. Layout 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. 5 shows T7350H devices connected in a typical free topology LONWORKS® network.

Fig. 4. Connecting personal computer to LonWorks® bus.

NOTEBOOK PC

 

 

 

 

T7350H

T7350H

T7350H

T7350H

T7770

 

 

 

 

WITH NO

 

 

 

 

LonWorks

 

 

 

 

BUS ACCESS

RS-232

 

 

 

 

SLTA

LonWorks

BUS

 

 

 

 

 

 

 

 

 

T7350H

 

MODEM

MODEM

 

 

 

 

SLTA

 

 

 

RS-232

 

 

 

LonWorks

BUS

T7350H

T7350H

T7350H

T7350H

MODEM

RS-232

LonWorks BUS

SLTA

T7770

LonWorks BUS

 

I/O CONNECTIONS

JACK FOR OPERATOR TERMINAL

M22493

Fig. 5. Typical topology for T7350 devices in LONWORKS® network.

11

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

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. Refer to LONWORKS® Bus Wiring Guidelines form 74-2865 for details.

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. If the network topology requires a singly terminated termination module at a T7350H, connect the singly terminated module wiring on the appropriate terminals as shown in Fig. 6.

SUBBASE

T5

T6

T7

T4

T3

OS

OS

AS

AS

AUX W3/Y4

Y3

W2

Y2

EB

EB

HS

HC

HP

M

M

X

RH

RC AUX

W1

Y1

G

BROWN YELLOW

PART NO. 209541B

TERMINATION MODULE

ORANGE

M22494

Fig. 6. Singly terminated LonWorks® bus termination module.

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. If the network topology requires a doubly terminated module at a T7350H (T7350H is the first or last device on the network cable) connect the termination module wiring on the appropriate terminals as shown in Fig. 7. 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.

SUBBASE

T5 T6 T7 T4 T3 OS OS AS AS AUX W3/Y4 Y3 W2 Y2

CAUTION

Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry.

Disconnect power supply before installation.

IMPORTANT

All wiring must agree with applicable codes, ordinances and regulations.

1.Loosen subbase terminal screws and connect system wires.

NOTE: Maximum (and recommended) wire size is 18gauge. Do not use wire smaller than 22-gauge. Follow equipment manufacturer wiring instructions when available. Refer to the Wiring Diagram section for typical hookups. A letter code is located near each terminal for identification. Refer to the Specifications section, Tables 8 and 9 for terminal designations.

2.Securely tighten each terminal screw.

3.Push excess wire back into the hole in the wall.

4.Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.

Wiring Details

LONWORKS® network cable should be wired separately from the power and I/O wires when installing T7350H models. If this is not possible, use a minimum of 4 in. (102 mm) separation between split ferrite cores (Fair-Rite 0443164151, www.fair-rite.com) to ensure compliance with Class B limits (does not apply to Class A limits). See Fig. 8 to apply ferrite cores to LONWORKS® Bus input and output.

Step 4. Prepare Wiring Diagrams

Fig. 9 through 12 show T7350 terminal arrangements and provide detailed wiring diagrams. Reference these diagrams to prepare the site-specific job drawings.

1.

WIRES TO T7300H

 

COMMUNICATING SUBBASE

EB EB HS HC HP M M X RH RC AUX W1 Y1 G

 

 

WIRES TO ALL

2.

BROWN

ORANGE

INPUTS AND

 

OUTPUTS

WIRES TO ALL

 

 

 

 

 

 

 

PART NO. 209541B

INPUTS AND

 

 

TERMINATION MODULE

OUTPUTS

YELLOW

M22495

Fig. 7. Doubly terminated LONWORKS® bus termination

modules.

WIRES TO T7300H

M22496

COMMUNICATING SUBBASE

Fig. 8. Ferrite core wires from T7350H to LONWORKS® inputs and outputs.

63-4368

12

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

 

OUTDOOR

4

 

 

T7770 REMOTE SENSOR

AIR

ECONOMIZER

COMPRESSOR

SENSOR

CONTACTOR 2

 

 

 

9 8 7 6 5 4 3 2 1

 

DISCHARGE

HEAT

HEAT

 

AIR

 

 

RELAY 3

RELAY 2

 

 

SENSOR

 

 

 

 

SUBBASE

T5

T6

T7

T4

T3

OS

OS

AS

AS

AUX W3/Y4

Y3

W2

Y2

EB

EB

HS

HC

HP

M

M

X

RH

RC AUX

W1

Y1

G

COMPRESSOR

CONTACTOR 3

LONWORKS®

HUMIDITY

MOTION

3

HEAT

FAN

BUS

 

RELAY 1

RELAY

SENSOR

SENSOR

 

 

 

 

 

LONWORKS®

BUS

COMPRESSOR

CONTACTOR 1

L2

1 2

L1

(HOT)

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

2ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.

3HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.

4 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22499

Fig. 9. Typical hookup of T7350H1009 in three-stage heat and three-stage cool conventional system with one transformer.

 

OUTDOOR

 

 

T7770 REMOTE SENSOR

AIR

 

COMPRESSOR

SENSOR

 

CONTACTOR 2

 

 

9 8 7 6 5 4 3 2 1

DISCHARGE

HEAT

HEAT

AIR

 

RELAY 3

RELAY 2

 

SENSOR

 

 

 

SUBBASE

T5

T6

T7

T4

T3

OS

OS

AS

AS

AUX W3/Y4

Y3

W2

Y2

EB

EB

HS

HC

HP

M

M

X

RH

RC AUX

W1

Y1

G

COMPRESSOR

CONTACTOR 3

LONWORKS®

HUMIDITY

MOTION

3

HEAT

 

FAN

 

BUS

 

RELAY 1

RELAY

 

SENSOR

SENSOR

 

 

 

 

 

 

 

LONWORKS®

 

 

 

 

 

 

 

BUS

 

 

 

4

COMPRESSOR

 

 

 

 

 

 

 

 

 

 

ECONOMIZER

CONTACTOR 1

 

L2

 

 

 

 

 

 

1

2

 

 

 

 

 

 

 

L1

 

 

 

 

 

 

 

(HOT)

 

 

 

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

AUXILIARY

L1

 

 

 

 

TRANSFORMER

 

 

 

 

 

 

(HOT)

 

 

 

 

 

 

 

 

 

 

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

2ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.

3HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.

4 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22497

Fig. 10. Typical hookup of T7350H1009 with auxiliary transformer.

13

63-4368

Honeywell T7350 User Manual

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

 

OUTDOOR

 

 

MODULATING

R

T7770 REMOTE SENSOR

AIR

 

 

COOL

 

SENSOR

 

 

+

(4-20 mA)

X

 

 

 

 

DISCHARGE

MODULATING

R

 

 

9 8 7 6 5 4 3 2 1

HEAT

 

 

 

AIR

 

 

 

 

+

(4-20 mA)

X

 

 

 

SENSOR

 

 

 

 

 

 

 

 

SUBBASE

T5

T6

T7

T4

T3

OS

OS

AS

AS

AX

AH

AC

AUX

EB

EB

HS

HC

HP

M

M

X

RH

RC

AUX

W1 Y1

G

 

 

 

 

 

 

 

 

 

2

 

 

 

LONWORKS®

HUMIDITY

MOTION

 

HEAT

FAN

 

BUS

 

RELAY 1

RELAY

 

SENSOR

SENSOR

 

 

 

 

 

 

LONWORKS®

 

 

 

 

 

 

BUS

 

 

 

COMPRESSOR

 

 

 

 

3

CONTACTOR 1

 

 

 

 

 

 

1

L2

 

 

ECONOMIZER

 

 

 

 

L2

 

L1

 

 

 

 

 

 

 

 

 

1

 

(HOT)

 

 

 

 

L1

 

 

 

 

 

 

 

 

HEATING

 

 

 

(HOT)

 

 

TRANSFORMER

 

 

 

COOLING

 

 

 

 

 

 

 

 

 

 

 

 

TRANSFORMER

 

1

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

 

2

WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.

 

3

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22498

Fig. 11. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating), two independent cool stages (one modulating), and two transformers.

 

OUTDOOR

 

 

MODULATING

R

T7770 REMOTE SENSOR

AIR

 

 

COOL

 

SENSOR

 

 

+

(4-20 mA)

X

 

 

 

 

DISCHARGE

MODULATING

R

 

 

9 8 7 6 5 4 3 2 1

HEAT

 

 

 

AIR

 

 

 

 

+

(4-20 mA)

X

 

 

 

SENSOR

 

 

 

 

 

 

 

 

SUBBASE

T5 T6 T7

T4

T3

OS

OS

AS

AS

MX

MH

MC

 

AUX

HS

HC

HP

M

M

X

RH

RC

AUX

W1

Y1

G

 

 

 

 

 

 

 

2

 

 

 

 

LONWORKS®

HUMIDITY

MOTION

HEAT

FAN

 

 

BUS

RELAY 1

RELAY

 

 

SENSOR

SENSOR

 

 

 

 

 

 

LONWORKS®

 

 

COMPRESSOR

 

 

BUS

 

 

 

 

 

 

CONTACTOR 1

 

 

 

 

 

 

 

 

 

 

3

L2

 

 

 

 

 

ECONOMIZER

1

 

 

 

 

L1

 

 

L2

 

 

 

 

1

 

 

 

(HOT)

 

 

 

 

 

 

 

L1

 

 

 

COOLING

 

 

(HOT)

 

 

 

 

 

 

 

 

TRANSFORMER

 

 

 

 

 

 

 

HEATING

 

 

 

TRANSFORMER

L2

AUXILIARY

 

 

 

 

 

 

 

L1

TRANSFORMER

 

 

 

 

 

(HOT)

 

 

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

 

2 WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.

 

3 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22491

Fig. 12. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating), two independent cool stages (one modulating), and three transformers.

63-4368

14

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