Honeywell W7752D OFF Nofanspeedsw Ubyte, Fieldeffectocc, Fieldhwoverride, Fieldschedocc

Page 58

EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nvoFanSpeedSw

nvoFanSpeedSw

nvoFcuStatus

nvoFcuStatus

nvoFcuStatus

field name

value

state

field_no

effect_occ

hw_override

Table C4. Output Variables for Excel 10 FCU Controllers.

engineering units:

digital

 

 

state

default

comments

English (metric) or states plus

or

range

 

 

value

 

 

 

 

 

NO_FAN

255

 

 

 

 

 

 

SNVT_switch.value

 

 

This output variable allows the fan speed switch of a master

0 to 100%

 

 

controller to be used for all slave Excel 10 controllers in the same

 

 

 

room.

SNVT_switch.state

 

 

See above.

OFF

 

 

 

ON

 

 

 

NO_FAN_SPEED_SW

 

 

 

UBYTE

 

 

This output variable is used to indicate which other data field in

FIELD_EFFECT_OCC

1

 

nvoFcuStatus has changed since the last time nvoFcuStatus was

FIELD_HW_OVERRIDE

2

 

sent out on the network. If any field has had a significant change,

FIELD_SCHED_OCC

3

 

only that field is updated, and field_no indicates which field. If three

FIELD_EFF_SEN_OCC

4

 

or more fields have changed significantly, then all fields are

FIELD_NET_MAN_OCC

5

 

updated and field_no is set to 0. All fields are also updated every

FIELD_HW_SEN_OCC

6

 

refresh time (55s).

FIELD_R_O_LED

7

 

 

FIELD_MODE

8

 

 

FIELD_ALARM_TYPE

9

 

 

FIELD_DLC_SHED

10

 

 

FIELD_EFF_WINDOW_OPEN

11

 

 

FIELD_HW_WINDOW_OPEN

12

 

 

FIELD_FAN_FEEDBACK

13

 

 

FIELD_EXTERNAL_ACTIVE

14

 

 

FIELD_FAN_STAGES_ACTIVE

15

 

 

FIELD_OUTPUT_POS_1

16

 

 

FIELD_OUTPUT_POS_2

17

 

 

FIELD_REHEAT_RELAY

18

 

 

FIELD_ACTIVE_SET_PT

19

 

 

FIELD_SPACE_TEMP

20

 

 

FIELD_REST_BYPASS_TIME

21

 

 

SNVT_occupancy

 

 

This output variable is the effective occupancy mode resulting from

OC_OCCUPIED

0

 

scheduled occupancy mode, occupancy sensor information,

OC_UNOCCUPIED

1

 

bypass push-button, or manual operator interface.

OC_BYPASS

2

 

 

OC_STANDBY

3

 

 

 

 

 

 

SNVT_occupancy

 

 

This output variable reports the current state of the remote override

OC_UNOCCUPIED

1

 

button.

OC_BYPASS

2

 

 

OC_NUL (No Override)

255

 

 

EN2B-0285GE51 R0909

56

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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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