Thermostat User Manual

ManualsBrandsHoneywell ManualsThermostatCOMMERCIAL PROGRAMMABLE T7350

SYSTEM ENGINEERING

® U.S. Registered Trademark

63-4368

T7350

Commercial Programmable Thermostat

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

ONMARK

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

ONWORKS

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

Summary of content (44 pages)

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T7350 Commercial Programmable Thermostat SYSTEM ENGINEERING Contents Introduction .................................................................................................................................. Device Description .............................................................................................. Control Application .............................................................................................. Network Control Provided .............................................
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT INTRODUCTION Device Description Control Application The T7350H is a LONMARK® certified thermostat that provides networking capability in a LONWORKS® system using a 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.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Network Control Provided Products Covered 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.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Applicable Literature 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. The following list of documents contains general information related to the T7350H Communicating Commercial Thermostats. Building Manager—A LONMARK® certified device that can be used to monitor and control HVAC equipment and other miscellaneous loads in a distributed network.
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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).
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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.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Communications 2-3/16 (56) 1-9/16 (40) 6-3/4 (171) 4-1/2 (114) SUBBASE 2-1/32 (52) 4-1/16 (104) 2-1/32 (52) 1-5/8 (42) 2-3/8 (60) 3-1/4 (83) 6-9/16 (166) 1-5/8 (42) M22432 Fig. 2. Dimensions of thermostat and subbase in in. (mm). 7 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).
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT LONMARK® Functional Profile Hardware Output Hardware Output SCC-Rooftop Object Number 8504.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT NETWORK CONFIGURATIONS 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.
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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 or XL10.nvoSpaceTemp T7350H.nviSpaceTemp • Occupancy Bypass: Any internal or external scheduled unoccupied state in the T7350H is overridden by a network occupancy bypass command.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Step 2. Determine Required Network Devices 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.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Cable Termination CAUTION 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.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 9 8 7 6 5 4 4 OUTDOOR AIR SENSOR T7770 REMOTE SENSOR 3 2 DISCHARGE AIR SENSOR 1 COMPRESSOR CONTACTOR 2 ECONOMIZER HEAT RELAY 3 HEAT RELAY 2 SUBBASE T5 T6 T7 T4 T3 OS OS AS AS EB EB HS HC HP M M X RH AUX W3/Y4 Y3 W2 Y2 AUX Y1 G RC W1 COMPRESSOR CONTACTOR 3 LONWORKS® BUS HUMIDITY SENSOR 3 MOTION SENSOR HEAT RELAY 1 LONWORKS® BUS 1 FAN RELAY COMPRESSOR CONTACTOR 1 L2 2 L1 (HOT) 1 POWER SUPPLY.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT 9 8 7 6 5 4 3 MODULATING R COOL – + (4-20 mA) X OUTDOOR AIR SENSOR T7770 REMOTE SENSOR 2 MODULATING HEAT – + (4-20 mA) DISCHARGE AIR SENSOR 1 R X SUBBASE T5 T6 T7 T4 T3 OS OS AS AS EB EB HS HC HP M M X RH AX AH AC RC AUX W1 AUX Y1 G 2 LONWORKS® BUS HUMIDITY SENSOR LONWORKS® BUS COMPRESSOR CONTACTOR 1 3 L2 1 FAN RELAY HEAT RELAY 1 MOTION SENSOR ECONOMIZER L2 L1 (HOT) 1 L1 (HOT) HEATING TRANSFORMER COOLING TRANS
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT General Considerations Table 8 lists wiring types, sizes and distances for the T7350 and Excel 10 products. The T7350 terminal strip accepts 18 through 22 AWG (0.82 to 0.34 sq. mm) wire. Table 8. Field Wiring Reference. Recommended Wire Size (Minimum) Specification or Requirement Digital Outputs: W Y G AUX X 18 AWG (0.82 sq mm) five wire cable bundle. Standard thermostat wire. AK3726 1000 feet. Modulating Outputs: MX MH MC 18 AWG (0.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 9. Honeywell Cable Details. Honeywell Part Number Size (AWG) Number of wires Jacket Plenum Rated Description AK3798 22 2 Yes No E-bus cable. AK3797 22 2 Yes Yes E-bus cable. AK3799 22 4 Yes Yes E-bus cable. AK4606ABE 22 2 Yes No Beige jacket. AK4628AWH 22 2 Yes Yes White jacket. AK3702x 18 2 No No — AK3741A 18 2 Yes No — AK3744C 18 2 Yes Yes Red jacket. AK3757C 18 2 Yes Yes White jacket.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Step 5. Order Equipment After compiling a bill of materials through completion of the previous application steps, refer to Table 10, Ordering Information. Table 10. Ordering Information. Part Number Product Description T7350H1009 Communicating Thermostat with three heating and three cooling digital outputs. • Optional heat pump control. • Isolated auxiliary digital output.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Step 7. Troubleshooting Table 11. Troubleshooting Information. Symptom Possible Cause Action Display will not come on. Thermostat is not being powered. Check that X terminal is connected to the system transformer. Check for 24 Vac between X and RH terminals. If missing 24 Vac: • Check if circuit breaker is tripped; if so, reset circuit breaker. • Check if system fuse is blown; if so, replace fuse.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 11. Troubleshooting Information. (Continued) Symptom Cooling will not come on. Possible Cause Action No power to the thermostat. Check that X terminal is connected to the system transformer. Check for 24 Vac between X and RH terminals. If missing 24 Vac: • Check if circuit breaker is tripped; if so, reset circuit breaker. • Check if system fuse is blown; if so, replace fuse.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX A - NETWORK TOOLS & WORKSTATIONS Device Configuration View & Modify Weekly Schedule View & Modify Holiday Schedule Data Monitoring Command Outputs to Manual Value Override System Delays Room Temperature Calibration Command Occupancy Override Command Fan Operation (On Auto) Command System Mode (off, auto, heat, cool) View & Modify Temperature Setpoints Report T7350 alarm data Network Time Scheduler for T7350 Devices Generate Trend & Log files with T7350 dat
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX B - NETWORK ALARM REPORTING Table 13. T7350H Alarm Change of State Event. A T7350H alarm change of state event is reported by the manufacturer defined output network variable nvoAlarmH. nvoAlarmH Field Description subnet The subnet number in the domain entry to which nvoAlarmH is bound. If nvoAlarmH is not bound, it reports domain index 0.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 15. Identifying Five Most Recent T7350 Alarms. The five most recent T7350 alarms are identified in the manufacturer defined output network variable nvoAlarmLog. nvoAlarmLog Field Description alarm1 Alarm log: Most recent alarm.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX C - NETWORK ERROR REPORTING Table 16. Reporting T7350H Errors. T7350H errors are reported through the manufacturer defined output network variable, nvoError. nvoError Field Description errLoclSpaceSensr Local space temperature sensor not working. 0: Sensor value is OK. (power up value) 1: Sensor is configured to function and is out of range or disconnected. errRemtSpaceSensr Remote space temperature sensor not working. 0: Sensor value is OK.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 16. Reporting T7350H Errors. (Continued) T7350H errors are reported through the manufacturer defined output network variable, nvoError. nvoError Field Description errSubBaseVerMisMatch Sub-base/cover firmware mismatch. 0: Sub-base and cover firmware are compatible. (power up value) 1: The firmware version in the sub-base is unable to communicate correctly with the firmware version of the cover assembly.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX D - NETWORK ACCESS TO LOCAL SENSOR DATA Table 17. T7350H Reports Local Sensor Data. The T7350H reports local sensor data using the following output network variables. Nv Name LonSpec Reference Name Description nvoDischAirTemp Discharge Temperature Out The current discharge air temperature. The sensor value source is configured by nciConfig.dischAirSensor. A value of 327.67 means the sensor is not functioning correctly or is out of range. 327.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX G - NETWORK CONNECTIONS TO OTHER LCBS DEVICES Table 18. Network Connections to XL15A AP Inputs. T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 18. Network Connections to XL15A AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 18. Network Connections to XL15A AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 18. Network Connections to XL15A AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 19. Network Connections to XL15A AP Outputs. T7350H Network Variable Inputs can be connected to XL15A application outputs. XL15A Application Object Destination T7350H Network Variable Application Output Network Time Schedule Scheduled Device List nviOccSchedule DLC External Load Assignment nviDlcShed Network Variable Field Table 20. Network Connections to XL15C AP Inputs.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 20. Network Connections to XL15C AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 20. Network Connections to XL15C AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 20. Network Connections to XL15C AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX H - T7350H NETWORK VARIABLE SUMMARY Table 21. T7350H Network Variable Summary. Nv Name nciApplVer LONSPEC™ Ref Name Application version Class CONFIG Description Application type: identifies the current application number for this device given by a tool. 0: (Default). Increment: increased by one whenever any configuration parameter changed by PDA or thermostat keyboard. LONSPEC™ and LONSTATION™ does not change this field. 0: (Default).
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name LONSPEC™ Ref Name Class nciRcvHrtBt Controller Receive Time CONFIG Receive heartbeat time (seconds) for all failure detect heartbeat network variables in this node. 0: Disable failure (Default). 300: Typical value in Honeywell system. nciSetpoints Setpoint Config CONFIG Heating and Cooling SetPoints in Celsius engineering units. Occupied cool set-point. 23.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nviBypass LONSPEC™ Ref Name Bypass In Class IN Description Remote time bypass input from usually from another device. Bypass is a method to command unoccupied override over the network from another controller. The other controller does the bypass timing. nviBypass can be used to place the T7350H into temporary occupied mode. This mode will bypass the time of day occupancy schedule in this device.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name LONSPEC™ Ref Name Class Description nviManValue Manual Value In IN Manual override values for outputs: Relays: Y1, Y2, Y3, Aux, G, W1, W2, W3 Analog Outputs: Mc, Mh nviOccManCmd Occupancy Cmd In IN Manual occupancy is a method to command the occupancy state from a network workstation. Effective occupancy override works on a “last in wins” basis.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nviOccSensor LONSPEC™ Ref Name Occupancy Sensor In Class IN Description There are 3 distinct modes of operation: local occupancy sensor, network occupancy sensor, or none. The network occupancy input is nviOccSensor. It is bound from another sensor or controller with occupancy status.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nvoAlarmH LONSPEC™ Ref Name Alarm Out Class OUT Description Alarm subnet, node and type. Alarm subnet is the LonWorks subnet number in domain entry to which nvoAlarmH is bound. If nvoAlarmH is not bound reports domain index 0. 0: Invalid subnet (power up value). 1-255: Subnet number. Alarm node is the LonWorks node number (in domain entry to which nvoAlarmH is bound.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nvoBypass LONSPEC™ Ref Name Bypass Out Class OUT Description The T7350H uses nvoBypass to command bypass to other XL10 nodes. When the T7350 is in bypass, it commands nvoBypass. This is a one to many bound relationship. “Many” means one T7350H can command bypass on all XL10s connected on the subnet. Reports whether this device is in timed bypass of the scheduled occupancy state.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nvoOccSchedule LONSPEC™ Ref Name Time Of Day Out Class OUT Description This output has current state, next state and tuncos (Time Until Change of State). This output is typically bound to other controller(s) that need a schedule command. This output is the combination of the local schedule and the network schedule command.
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nvoStatus LONSPEC™ Ref Name Status Class OUT Description Status: Alarm notify disabled: 0: Alarm notification is turned on (power up value). 1: Alarm notification via nvoAlarmH, nvoAlarmLog, nvoUnitStatus, and nvoStatus has been turned off. Alarm 0: no alarm (power up value). 1: there is an alarm. Override the delays associated with automatic control: 0: Delays turned on (power up value).
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name nvoUnitStatus LONSPEC™ Ref Name Unit Status Class OUT Description Unit Status: Percentage of cooling capability currently being supplied to the controlled space. 163.84: Power up value. Fan turned on or off: 0: Fan not running. 100: Fan running. 163.84: (power up value).
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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Class Description CONFIG: LonMark network configuration parameters FTP CONFIG: Configuration parameters implemented with the LonMark file transfer protocol IN: Network variable inputs. OUT: Network variable outputs. ZIRE and TUNGSTEN are trademarks of palmOne, Inc. HotSync and Palm OS are registered trademarks of PalmSource, Inc. Palm is a trademark of PalmSource, Inc. TRGPro is a trademark of HandEra, Inc.