Honeywell W7752D Ocunoccupied Ocbypass Ocstandby Ocnul, Ocunoccupied Ocnul, Ocunoccipied

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nvoFcuStatus

nvoFcuStatus

nvoFcuStatus

nvoFcuStatus

nvoFcuStatus

nvoFcuStatus (continued)

field name

sched_occ

eff_sen_occ

net_man_occ

hw_sen_occ

r_o_led

mode

Table C4. Output Variables for Excel 10 FCU Controllers.

engineering units:

digital

 

 

state

default

comments

English (metric) or states plus

or

range

 

 

value

 

 

 

 

 

SNVT_occupancy

 

 

This output variable reports the current scheduled occupancy

OC_OCCUPIED

0

 

received via the network.

OC_UNOCCUPIED

1

 

 

OC_BYPASS

2

 

 

OC_STANDBY

3

 

 

OC_NUL (No Override)

255

 

 

SNVT_occupancy

 

 

This output variable reports the effective state of occupancy

OC_OCCUPIED

0

 

sensor(s) connected either to the input terminals or to other nodes

OC_UNOCCUPIED

1

 

on the network that are bound to this controller.

OC_NUL (No Override)

255

 

 

SNVT_occupancy

 

 

This output variable reports the manual occupancy from the

OC_OCCUPIED

0

 

network.

OC_UNOCCUPIED

1

 

 

OC_BYPASS

2

 

 

OC_STANDBY

3

 

 

OC_NUL

255

 

 

 

 

 

 

SNVT_occupancy

 

 

This output variable reports the state of the occupancy sensor

OC_OCCUPIED

0

 

wired to the node.

OC_UNOCCUPIED

1

 

 

OC_NUL

255

 

 

SNVT_occupancy

 

 

This output variable reports the current state of the remote override

OC_OCCUPIED

0

 

LED which indicates the effective schedule override resulting from

OC_UNOCCIPIED

1

 

the bypass push-button or a network override.

OC_BYPASS

2

 

OC_OCCUPIED: 2 flashes per second

OC_STANDBY

3

 

OC_UNOCCUPIED: 1 flash per second

OC_NUL

255

 

OC_BYPASS: on

 

 

 

OC_STANDBY: 2 flashes per second

 

 

 

OC_NUL: off

 

 

 

 

BYTE

 

 

This output variable is the current operating mode of the node

CTL_COOL

0

 

determined by many inputs and arbitrated by control logic.

CTL_HEAT

1

 

CTL_PRESSURIZE disables the heat/cool outputs, fan runs at

CTL_PRESSURIZE

2

 

highest speed.

CTL_DE_PRESSURIZE

3

 

CTL_DE_PRESSURIZE disables the heat/cool outputs, fan is

CTL_MODE_MANUAL

4

 

turned OFF.

CTL_MODE_FACTORY_TEST

5

 

CTL_MODE_MANUAL allows turning outputs ON/OFF manually

CTL_FLOATING_OUT_SYNCH

6

 

through nviTest.

CTL_FAN_SWITCH_OFF

7

 

CTL_MODE_FACTORY_TEST is intended only for the factory.

CTL_START_UP_WAIT

8

 

CTL_FLOATING_OUT_SYNCH allows enough time (150% valve

CTL_DISABLED

255

 

run-time) for the valve(s) are at their initial positions (control

 

 

 

algorithms are active). The controller then goes into one of the

 

 

57

EN2B-0285GE51 R0909

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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 Typical system overview Description of DevicesProduct Names Products CoveredOrganization of Manual Applicable LiteratureControl Provided Control ApplicationSetpoint from Network SetpointsSetpoint Knob Setpoint LimitsZEB Bypass Energy-Saving FeaturesOccupancy Status Operating Modes Safety FeaturesElectrical Shock Hazard ConstructionExcel 10 W7752 FCU Controllers Excel 10 W7754 FCU Controllers180 Controller Performance Specifications Fan Type ConfigurationsGeneral Type of Heating and Cooling Equipment Digital Input Reheat OutputExcel 10 Wall Module Options Common Temperature Control Master/Slave ControllersAbbreviations and Definitions Step No Description OverviewPlan the System Determine Other Bus Devices RequiredLonworks Layout Lay Out Communications and Power WiringGeneral Considerations Prepare Wiring DiagramsPower Wiring Plenum WiringPower Vendor wire typeLOW 230 XAL-Term ONW Orks TerminationEchelon-Based Components and Parts Order EquipmentExcel 10 Wall Modules Excel 10 SensorsUsing Plug-Ins Configure ControllersOutput Input Fan Equipment ControlMiscellaneous Switching LevelsZone Options Commissioning TroubleshootingTroubleshooting Excel 10 FCU Controllers and Wall Modules AlarmsReturntonormal FCU AlarmsManual Mode Broadcasting the Service MessageProcedure Temperature Sensor CalibrationNetwork Variable Binding Output Configuration OptionsInput Configuration Options Zone Control OptionsAppendix C LON Interface Page NV name Continuous Automode To 100% For the reheat output EN2B-0285GE51 R0909 Byte Fiveposition NoswitchByte Ntcnonlinearize NtcnonlinearizedDiairflow Byte DinotusedDiwindowclosed DioccupiedsensorThreestage Byte FloatingOnestage TwostageRelnotused Byte ReheatFreeuse Twopipe FourpipeUword Nobutton OffsetAbsolutemiddle BypassunoccupieTable C3. Input Variables for Excel 10 FCU Controllers Ocnul Modeenable UnsuppressalarmsModedisable SuppressalarmsInvalid Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskOFF NUL OFF1ON2 Byte NormalhcmodeOFF1OFF2 ON1OFF2Ledoff Ledon Byte NormalfanmodeOpen NowindowClosed Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailschedocc RtncomfailtempresetAlarmnotifydisabled RtncomfailsetptoffsOcbypass Ocstandby Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOFF Notassigned Fieldschedocc OFF Nofanspeedsw UbyteFieldeffectocc FieldhwoverrideOcunoccupied Ocbypass Ocstandby Ocnul CtlfanswitchoffCtldisabled Ocunoccupied Ocbypass OcstandbyExternalnotactice Not Actice ActiveFanoffafteroncmd FanrunsInvalid Uword StoffSton Contactopen Contactclosed Uword OFF NoreheatNotpressed PressedInvalid Byte Initial Stlow Stmed SthighInalarm EnabledDisabled NoalarmOpen Nowindow Alarm Suppressalarms AlarmnotifydisabledBugver Nodetype Word Table C5. Unused Variables for Excel 10 FCU ControllersAutomation 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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