Honeywell W7752D Construction, Excel 10 W7752 FCU Controllers, Excel 10 W7754 FCU Controllers

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Construction

Excel 10 W7752 FCU Controllers

The Excel 10 W7752 FCU Controller is available in five basic models, each with two different possibilities for LONWORKS transceivers. All of these controllers are mains-powered, and two models are equipped with an additional high-power relay for applications with electric reheat. Table 5 shows the differences between models.

Table 5. Excel 10 W7752 FCU Controller models

OS number

power input

reheat relay

W7752D2007

230 Vac

X

W7752E2004

230 Vac

 

W7752F2002

115 Vac

X

W7752G2000

115 Vac

 

W7752J2003

100 Vac

 

All wiring connections to the controllers are made at screw terminal blocks accessible beneath a plastic safety cover. Mounting dimensions are shown in Fig. 6 on page 10.

Excel 10 W7754 FCU Controllers

The Excel 10 W7754 FCU Controller is available in five basic models, each with two different possibilities for LONWORKS transceivers. Table 6 shows the differences between models.

Table 6. Excel 10 W7754 FCU Controller models

OS number

 

power input

 

reheat relay

W7754K1001

 

230 Vac

 

 

W7754L1009

 

24 Vac

 

 

W7754M1007

 

230 Vac

 

 

W7754N1004

 

230 Vac

 

 

W7754P1000

 

230 Vac

 

X

All wiring connections to the controllers are made at screw terminal blocks accessible beneath a plastic safety cover. Mounting dimensions are shown in Fig. 7 on page 10.

CAUTION

If Excel 10 FCU Controllers are mounted vertically and thermal actuators are used, the transformer must not be located below the electronics due to heating effects.

WARNING

Electrical Shock Hazard.

Mains power at terminal block can cause personal injury or death. Excel 10 FCU Controllers must be mounted inside their fan coil unit boxes to prevent access by unauthorized personnel.

To reduce the risk of fire or electric shock, install in a controlled environment relatively free of contaminants.

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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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