Honeywell W7752D specifications Description of Devices, Typical system overview

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

INTRODUCTION

Description of Devices

The W7752D,E,F,G, and J Controllers and W7754K,L,M,N, and P Controllers are Fan Coil Unit Controllers belonging to the Excel 10 product line. Excel 10 FCU Controller systems control the space temperature in a given room by regulating the heating and/or cooling equipment which control the tem- perature of the air delivered to that space and the fan which controls air flow. Reheat coils are often included at the fan coil unit. Excel 10 FCU Controllers are capable of stand-alone operation; however, optimum functional benefits are achieved when the network communication capabilities are used.

A family of direct wired wall modules with a temperature sensor for space temperature measurement, setpoint adjust- ment, bypass push-button, status LED, and LCD display can be used in conjunction with Excel 10 FCU Controllers.

Excel 5000

The wall modules are available in a variety of models incorporating various combinatinos of the following options:

•Setpoint adjustment

•Bypass pushbutton and LED

•Fan Switching

•See Table 7 on page 12 for a complete list of wall modules options

Excel 10 FCU Controllers connect to a LonWorks network and interoperate with 3rd-party nodes.

PCLTA20

 

LonWorks network

 

 

PCC10

 

 

Excel 10 W7754

 

Honeywell

Honeywell

Excel 10 W7752

 

 

FCU Controller

 

FCU Controller

Excel 10

wall module

Excel 10

wall module

Fig. 1. Typical system overview

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EN2B-0285GE51 R0909

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Contents Excel Appendix a Using An LNS tool to Commission a Fan Coil Unit Appendix B Configuring for Master/Slave OperationAppendix C LON Interface Revision History 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 Configurations GeneralFan Type 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 WiringPrepare Wiring Diagrams Power WiringGeneral Considerations 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 ControlSwitching Levels Zone OptionsMiscellaneous 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 TwostageByte Reheat FreeuseRelnotused Twopipe FourpipeUword Nobutton OffsetAbsolutemiddle BypassunoccupieTable C3. Input Variables for Excel 10 FCU Controllers Ocnul Modeenable UnsuppressalarmsModedisable SuppressalarmsRqnormal Rqupdatestatus Rqupdatealarm Rqreportmask OFF NULInvalid OFF1ON2 Byte NormalhcmodeOFF1OFF2 ON1OFF2Ledoff Ledon Byte NormalfanmodeNowindow ClosedOpen Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailschedocc RtncomfailtempresetAlarmnotifydisabled RtncomfailsetptoffsAlmcomfailmanheat Almcomfailmancool Almhwswmismatch OFF NotassignedOcbypass Ocstandby Fieldschedocc OFF Nofanspeedsw UbyteFieldeffectocc FieldhwoverrideOcunoccupied Ocbypass Ocstandby Ocnul CtlfanswitchoffCtldisabled Ocunoccupied Ocbypass OcstandbyExternalnotactice Not Actice ActiveFanoffafteroncmd FanrunsStoff StonInvalid Uword 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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