Honeywell W7752D specifications Broadcasting the Service Message, Manual Mode

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Broadcasting the Service Message

The Service Message allows a device on the LonWorks network to be positively identified. The Service Message contains the controller Neuron ID number and, therefore, can be used to confirm the physical location of a particular Excel 10 FCU Controller in a building.

When an Assign Neuron ID command is issued from the LNS tool, the node goes into the SERVICE_MESSAGE mode for one minute. In the SERVICE_MESSAGE mode, pressing the occupancy override button on the remote Excel 10 wall module causes the Service Message to be broadcast on the network. All other functions are normal in the SERVICE_MESSAGE mode. If an FCU Controller does not have a bypass button connected, it can still broadcast the Service Message on the network by temporarily shorting the controller Fan Speed/Bypass input terminal to the AGND terminal on the controller (terminals 5 and 7) with the controller in SERVICE_MESSAGE mode.

Manual Mode

The FCU Controller can be put into a manual mode which allows manual setting of outputs for system checkout. The variable nviManualMode must be set to Mode_Manual using the LNS tool. Triac outputs can be set to any combination of ON/OFF or can be set to a test position based upon the configured valve runtime/cycle time. The fan relays and reheat relay (W7752D, F and W7754P1000, only) can also be commanded ON/OFF in any combination. The override LED can be commanded ON/OFF in this mode also.

EN2B-0285GE51 R0909

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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 overviewApplicable Literature Products CoveredOrganization of Manual Product NamesControl Application Control ProvidedSetpoint Limits SetpointsSetpoint Knob Setpoint from NetworkZEB Energy-Saving Features BypassOccupancy Status Safety Features Operating ModesExcel 10 W7754 FCU Controllers ConstructionExcel 10 W7752 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 Determine Other Bus Devices Required OverviewPlan the System Step No DescriptionLay Out Communications and Power Wiring Lonworks LayoutPower Wiring Prepare Wiring DiagramsGeneral Considerations Vendor wire type WiringPower PlenumLOW 230 ONW Orks Termination XAL-TermExcel 10 Sensors Order EquipmentExcel 10 Wall Modules Echelon-Based Components and PartsConfigure Controllers Using Plug-InsOutput Input Equipment Control FanZone Options Switching LevelsMiscellaneous Alarms TroubleshootingTroubleshooting Excel 10 FCU Controllers and Wall Modules CommissioningFCU Alarms ReturntonormalBroadcasting the Service Message Manual ModeTemperature Sensor Calibration ProcedureZone Control Options Output Configuration OptionsInput Configuration Options Network Variable BindingAppendix C LON Interface Page NV name Continuous Automode To 100% For the reheat output EN2B-0285GE51 R0909 Ntcnonlinearized NoswitchByte Ntcnonlinearize Byte FivepositionDioccupiedsensor Byte DinotusedDiwindowclosed DiairflowTwostage Byte FloatingOnestage ThreestageFreeuse Byte ReheatRelnotused Fourpipe TwopipeUword Bypassunoccupie OffsetAbsolutemiddle NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Suppressalarms Modeenable UnsuppressalarmsModedisable OcnulOFF NUL Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskInvalid ON1OFF2 Byte NormalhcmodeOFF1OFF2 OFF1ON2Byte Normalfanmode Ledoff LedonClosed NowindowOpen Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailsetptoffs RtncomfailtempresetAlarmnotifydisabled RtncomfailschedoccOFF Notassigned Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOcbypass Ocstandby Fieldhwoverride OFF Nofanspeedsw UbyteFieldeffectocc FieldschedoccOcunoccupied Ocbypass Ocstandby CtlfanswitchoffCtldisabled Ocunoccupied Ocbypass Ocstandby OcnulFanruns Not Actice ActiveFanoffafteroncmd ExternalnotacticeSton StoffInvalid Uword Pressed OFF NoreheatNotpressed Contactopen Contactclosed UwordStlow Stmed Sthigh Invalid Byte InitialNoalarm EnabledDisabled 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.
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