Honeywell W7752D specifications Continuous Automode

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciRcvHrtBt

nciSndHrtBt

nciCntrlSettings

field name

fan_auto_mode

Table C2. Configuration Variables for Excel 10 FCU Controllers

engineering units:

digital

 

 

 

state

default

 

comments

English (metric) or states

 

or

 

plus range

 

 

 

value

 

 

 

 

 

 

 

SNVT_time_sec

 

0 s from factory

This configuration variable specifies the maximum time that elapses

0 to 6553 seconds

 

 

after the last update to

0 = Disabled

 

 

nviApplicMode

 

 

 

nviDlcShed

 

 

 

nviManCool

 

 

 

nviManHeat

 

 

 

nviSensorOcc

 

 

 

nviSetPtOffset

 

 

 

nviSpaceTemp

 

 

 

nviTodEvent

 

 

 

nviWindow

before these NV inputs adopt their default values. Setting nciRcvHrtBt = 0 means, that the assigned NV input does not wait for an periodic update, and that it will never revert to any default when not receiving an update. If nviSpaceTemp and nviApplicMode are not received at regular intervals that are less than the heartbeat time, the controller will assume that there is a communication failure and revert to the "occupied" mode.

SNVT_time_sec

0 s from factory

This configuration variable specifies the maximum time that expires

0 to 6553 seconds

 

before the object automatically transmits the current value of

0 = Disabled

 

nvoActiveSetPt

 

 

nvoAlarm

 

 

nvoApplicMode

 

 

nvoCoolOutput

 

 

nvoFanSpeed

 

 

nvoFcuStatus

 

 

nvoHeatOutpu

 

 

nvoReheatt

 

 

nvoSensorOcc

 

 

nvoSpaceTemp

 

 

nvoTerminalLoad

 

 

nvoUnitStatus

 

 

nvoWindow

This provides a heartbeat output that can be used by the destination objects to ensure that the node is still healthy. The heartbeat output may be disabled by setting nciSndHrtBt = 0.

CONTINUOUS

0

AUTO_MODE

This configuration variable specifies the fan operation during the

AUTO_MODE

1

 

"occupied" mode. CONTINUOUS will cause the fan to run even in the

 

 

 

zero energy band.

EN2B-0285GE51 R0909

38

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Contents Excel Appendix B Configuring for Master/Slave Operation Appendix a Using An LNS tool to Commission a Fan Coil UnitAppendix C LON Interface Revision History Description of Devices Typical system overviewProducts Covered Organization of ManualApplicable Literature Product NamesControl Application Control ProvidedSetpoints Setpoint KnobSetpoint Limits Setpoint from NetworkZEB Energy-Saving Features BypassOccupancy Status Safety Features Operating ModesConstruction Excel 10 W7752 FCU ControllersExcel 10 W7754 FCU Controllers Electrical Shock Hazard180 Controller Performance Specifications General ConfigurationsFan Type Type of Heating and Cooling Equipment Reheat Output Digital InputCommon Temperature Control Master/Slave Controllers Excel 10 Wall Module OptionsAbbreviations and Definitions Overview Plan the SystemDetermine Other Bus Devices Required Step No DescriptionLay Out Communications and Power Wiring Lonworks LayoutPower Wiring Prepare Wiring DiagramsGeneral Considerations Wiring PowerVendor wire type PlenumLOW 230 ONW Orks Termination XAL-TermOrder Equipment Excel 10 Wall ModulesExcel 10 Sensors Echelon-Based Components and PartsConfigure Controllers Using Plug-InsOutput Input Equipment Control FanZone Options Switching LevelsMiscellaneous Troubleshooting Troubleshooting Excel 10 FCU Controllers and Wall ModulesAlarms CommissioningFCU Alarms ReturntonormalBroadcasting the Service Message Manual ModeTemperature Sensor Calibration ProcedureOutput Configuration Options Input Configuration OptionsZone Control Options Network Variable BindingAppendix C LON Interface Page NV name Continuous Automode To 100% For the reheat output EN2B-0285GE51 R0909 Noswitch Byte NtcnonlinearizeNtcnonlinearized Byte FivepositionByte Dinotused DiwindowclosedDioccupiedsensor DiairflowByte Floating OnestageTwostage ThreestageFreeuse Byte ReheatRelnotused Fourpipe TwopipeUword Offset AbsolutemiddleBypassunoccupie NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Modeenable Unsuppressalarms ModedisableSuppressalarms OcnulOFF NUL Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskInvalid Byte Normalhcmode OFF1OFF2ON1OFF2 OFF1ON2Byte Normalfanmode Ledoff LedonClosed NowindowOpen Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailtempreset AlarmnotifydisabledRtncomfailsetptoffs RtncomfailschedoccOFF Notassigned Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOcbypass Ocstandby OFF Nofanspeedsw Ubyte FieldeffectoccFieldhwoverride FieldschedoccCtlfanswitchoff CtldisabledOcunoccupied Ocbypass Ocstandby Ocunoccupied Ocbypass Ocstandby OcnulNot Actice Active FanoffafteroncmdFanruns ExternalnotacticeSton StoffInvalid Uword OFF Noreheat NotpressedPressed Contactopen Contactclosed UwordStlow Stmed Sthigh Invalid Byte InitialEnabled DisabledNoalarm InalarmAlarm Suppressalarms Alarmnotifydisabled Open NowindowBugver Nodetype Table C5. Unused Variables for Excel 10 FCU Controllers WordAutomation and Control Solutions

W7752D specifications

The Honeywell W7752D is a versatile and advanced electronic gas combination control designed primarily for use in commercial heating systems. This product stands out for its ability to manage both gas ignition and safety functions, which are critical for maintaining the efficiency and safety of heating appliances. Its robust construction and advanced features make it a popular choice for HVAC professionals and service technicians.

One of the main features of the W7752D is its integration of multiple functions in a single device. It serves as both an automatic gas ignition control and a safety shut-off valve, which simplifies installation and reduces the need for additional components. This integrated design not only enhances reliability but also streamlines maintenance procedures.

Another notable technology utilized in the W7752D is its microprocessor-based control logic. This advanced technology allows for precise management of the ignition sequence, improving the overall efficiency of the heating system. The microprocessor enables the control to adapt to varying operating conditions, ensuring optimal performance even under changing demands.

The W7752D is equipped with features that enhance user-interface and diagnostics capabilities. It includes LED indicators that provide clear information about the operational status and any potential issues. This diagnostics capability facilitates easier troubleshooting, saving time and reducing the likelihood of extended downtimes.

Safety is a primary concern in gas appliances, and the W7752D addresses this with built-in safety mechanisms, including flame detection technologies. These features ensure that the appliance operates safely, automatically shutting down in case of any irregularities during operation. This emphasis on safety not only protects property but also provides peace of mind for users.

In terms of compatibility, the Honeywell W7752D is designed to work with a wide range of gas heating appliances. Its flexibility allows it to be used in various applications, making it suitable for different types of commercial environments. Additionally, the control complies with relevant safety and performance standards, ensuring reliable operation.

In summary, the Honeywell W7752D combines advanced technology with essential safety features, making it a top choice for commercial heating applications. Its integrated design, microprocessor-based control, user-friendly diagnostics, and robust safety mechanisms make it an essential component for efficient and safe gas heating systems. Whether it is for new installations or replacements, the W7752D provides HVAC professionals with the reliability and ease of use they demand.