Honeywell W7752D specifications Uword

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciSetPnts

nciSetPnts

nciSetPnts

nciSetPnts

nciSetPnts

nciWallMod

nciWallMod

nciWallMod

nciWallMod

field name

standby_cool

unoccupied_cool

occupied_heat

standby_heat

unoccupied_heat

ui_bypass_time

si_low_setpt

si_high_setpt

si_space_temp_zero_ cal

Table C2. Configuration Variables for Excel 10 FCU Controllers

engineering units:

digital

 

 

state

default

comments

English (metric) or states

or

plus range

 

 

value

 

 

 

 

 

SNVT_temp_p

 

77°F (25°C)

This is the configured setpoint which applies to the standby cooling

50 to 95°F (10 to 35°C)

 

 

mode. Where the ZEB for standby is used, it is derived from the

 

 

 

difference between standby_cool and standby_heat.

 

 

 

 

SNVT_temp_p

 

82.4°F (28°C)

This is the configured setpoint which applies to the unoccupied cooling

50 to 95°F (10 to 35°C)

 

 

mode.

 

 

 

 

SNVT_temp_p

 

69.8°F (21°C)

This is the default setpoint for the occupied heating setpoint which is

50 to 95°F (10 to 35°C)

 

 

used in case there is no locally wired setpoint knob or nviSetpoint has

 

 

 

not been bound. Where the ZEB for occupied is used, it is derived from

 

 

 

the difference between occupied_cool and occupied_heat.

 

 

 

 

SNVT_temp_p

 

66.2°F (19°C)

This is the configured setpoint which applies to the standby heating

50 to 95°F (10 to 35°C)

 

 

mode. Where the ZEB for standby is used, it is derived from the

 

 

 

difference between standby_cool and standby_heat.

 

 

 

 

SNVT_temp_p

 

60.8°F (16°C)

This is the configured setpoint which applies to the unoccupied heating

50 to 95°F (10 to 35°C)

 

 

mode.

 

 

 

 

UWORD

 

180 min

This configuration variable specifies the time the controller remains in

0 to 1080 minutes

 

 

OCCUPIED mode before reverting to the original occupancy mode

 

 

 

after pressing the override button at the wall module or initiating

 

 

 

BYPASS via the network. When the bypass mode has been activated,

 

 

 

the bypass timer is set to ui_bypass_time. When the timer expires,

 

 

 

nvoFcuStatus.occ_status.hw_override reverts from OC_BYPASS to

 

 

 

OC_NUL to quit the bypass override function.

SNVT_temp_p

 

-9 DDF (-5 K)

This configuration variable specifies the low limit for the setpoint knob.

-9 to 9 DDF (-5 to 5 K) for

 

(53.6°F (12°C) for

It can be relative or absolute depending upon the configuration in

relative

 

absolute setpoint)

nciWallMod.set_pnt_knob.

53.6to 86°F (12 to 30°C) for absolute

SNVT_temp_p

9 DDF (5 K)

This configuration variable specifies the high limit for the setpoint knob.

-9 to 9 DDF (-5 to 5 K) for

(86°F (30°C) for

It can be relative or absolute depending upon the configuration in

relative

absolute setpoint)

nciWallMod.set_pnt_knob.

53.6to 86°F (12 to 30°C) for absolute

SNVT_temp_p

0 DDF (0 K)

The space temperature sensor is corrected by adding this calibration

--9 to 9 DDF (-5 to 5 K)

 

setting (an offset value) to the sensed value.

45

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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