Honeywell W7752D specifications OFF Noreheat, Notpressed, Pressed, Contactopen Contactclosed Uword

Page 62

EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

field name

 

 

nvoFcuStatusP

external_active

 

 

nvoFcuStatusP

fan_stages_active

 

 

nvoFcuStatusP

output_position[0]

 

 

nvoFcuStatusP

output_position[1]

 

 

nvoFcuStatusP

reheat_active

 

 

nvoFcuStatusP

active_set_pt

 

 

nvoFcuStatusP

space_temp

 

 

nvoFcuStatusP

rest_bypass_time

 

 

nvoHeatOutput

 

nvoReheat

value

 

 

nvoReheat

state

 

 

nvoSensor

override_button

 

 

nvoSensor

contact_state_DI1

 

 

nvoSensor

raw_data[0]

 

 

nvoSensor

raw_data[1]

nvoSensor raw_data[2] EN2B-0285GE51 R0909

Table C4. Output Variables for Excel 10 FCU Controllers.

engineering units:

digital

 

 

state

default

comments

English (metric) or states plus

or

range

 

 

value

 

 

 

 

 

Same as nvoFcuStatus

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus.

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus.

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus.

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus.

 

 

Same as nvoFcuStatus.

 

 

 

 

Same as nvoFcuStatus.

 

 

Same as nvoFcuStatus.

 

 

 

 

SNVT_lev_percent

 

 

This output variable is the heating output which is typically used for

0 to 100%

 

 

monitoring or bound to a heat actuator node or another Excel 10

163.835% = INVALID

 

 

controller operating as slave. nvoHeatOutput will be transmitted

 

 

 

immediately when its value has changed significantly (>= 1%), and

 

 

 

periodically according to nciSndHrtBt. The output value represents

 

 

 

the output of the control algorithm but is limited to a range of 0% to

 

 

 

100%.

SNVT_switch.value

 

 

This output variable reports the actual state of the reheat output. It

0 to 100%

 

 

can be bound to another Excel 10 controller acting as a slave, or it

 

 

 

can be bound to a third-party reheat node.

 

 

 

 

SNVT_switch.state

0

 

See above.

OFF

 

 

ON

1

 

 

NO_REHEAT

2

 

 

Bit

 

 

This output variable indicates the status of the override push-

NOT_PRESSED

0

 

button.

PRESSED

1

 

 

 

 

 

 

Bit

0

 

This output variable indicates the state of the digital input.

CONTACT_OPEN

 

 

CONTACT_CLOSED

1

 

 

UWORD

 

 

This output variable contains the analog to digital converter count

0 to 65535

 

 

measured from the analog value of the temp. sensor, which

 

 

 

represents the measured time during the second part of each A/D

 

 

 

conversion.

 

 

 

 

UWORD

 

 

Same as above for the fan speed switch.

0 to 65535

 

 

 

 

 

 

 

UWORD

 

 

Same as above for the setpoint knob.

 

 

 

 

 

 

60

 

Page 61 Page 63
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Page 61 Page 63
Contents Excel Appendix C LON Interface Revision History Appendix a Using An LNS tool to Commission a Fan Coil UnitAppendix B Configuring for Master/Slave Operation 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 Fan Type ConfigurationsGeneral 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 LayoutGeneral Considerations Prepare Wiring DiagramsPower Wiring 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 FanMiscellaneous Switching LevelsZone Options 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 ThreestageRelnotused Byte ReheatFreeuse Fourpipe TwopipeUword Bypassunoccupie OffsetAbsolutemiddle NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Suppressalarms Modeenable UnsuppressalarmsModedisable OcnulInvalid Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskOFF NUL ON1OFF2 Byte NormalhcmodeOFF1OFF2 OFF1ON2Byte Normalfanmode Ledoff LedonOpen NowindowClosed Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailsetptoffs RtncomfailtempresetAlarmnotifydisabled RtncomfailschedoccOcbypass Ocstandby Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOFF Notassigned Fieldhwoverride OFF Nofanspeedsw UbyteFieldeffectocc FieldschedoccOcunoccupied Ocbypass Ocstandby CtlfanswitchoffCtldisabled Ocunoccupied Ocbypass Ocstandby OcnulFanruns Not Actice ActiveFanoffafteroncmd ExternalnotacticeInvalid Uword StoffSton 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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