Honeywell W7752D specifications Input

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Input

The available options for input configurations with the default values shown are listed in Table 17. See sections "Control Provided" and "Configurations" above for more information on parameters.

Table 17. FCU Controller input configuration options

function

configuration options

default

space temperature sensor

no sensor

sensor

sensor

 

 

 

none - bypass button is disabled.

 

 

bypass unoccupied - bypass button overrides current mode to occupied

 

 

for configurable bypass time for button press of 1.1 to 4 seconds (single

bypass unoccupied

bypass button

press with T7560) or permanently overrides to unoccupied for button

 

press of 4.1 to 7 seconds (more than 5 seconds with T7560).

 

 

bypass - bypass button only overrides current mode to occupied and to

 

 

cancel the override again.

 

 

LED override - shows override from bypass button or from network.

 

LED/LCD

LED occupancy - shows effective occupancy mode.

LED override

LCD display - only used with T7560 Wall Modules; occupancy mode is

 

 

 

represented by different symbols.

 

 

 

 

fan speed switch

no switch

 

3-position switch

5-position switch

(or respective T7560

4-position switch

setting)

 

5-position switch

 

 

 

 

 

 

 

no knob

 

setpoint knob

relative

relative

 

absolute middle

 

 

limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86

-9 DDF (53.6 °F for

min. limit setpoint pot

°F) or DDF (relative setpoint, -9 to 9 DDF)

absolute setpoint)

(limit for setpoint knob in either degrees C (absolute setpoint, 12 to

(-5 K (12 °C for

 

 

30°C) or K (relative setpoint, -5 to 5 K))

absolute setpoint))

 

limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86

9 DDF (86 °F for

max. limit septoint pot

°F) or DDF (relative setpoint, -9 to 9 DDF)

absolute setpoint)

(limit for setpoint knob in either degrees C (absolute setpoint, 12 to 30

(5 K (30 °C for

 

 

°C) or K (relative setpoint, -5 to 5 K))

absolute setpoint))

 

not used

 

 

window closed

 

 

occupied sensor

 

 

cool changeover

not used

digital input

window open

 

unoccupied sensor

 

 

heat changeover

 

 

movement

 

 

no movement

 

Notes:

 

 

1.The temperature sensor option no sensor requires that either the FCU Controller be configured as a slave unit receiving heating and cooling control levels from the master unit via the network, or that it receive temperature information over the network from another device.

2.The digital input option to be selected is the condition in which the input will be high (switch contact closed).

3.Furthermore, all W7754 controllers are equipped with an additional digital output which is permanently assigned to the function window contact. This digital input is not visible in the configuration with the plug-in. This digital input can be enabled / disabled using the right DIP switch located on the top of the controller

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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 DevicesOrganization of Manual Products CoveredApplicable Literature Product NamesControl Provided Control ApplicationSetpoint Knob SetpointsSetpoint Limits Setpoint from NetworkZEB Bypass Energy-Saving FeaturesOccupancy Status Operating Modes Safety FeaturesExcel 10 W7752 FCU Controllers ConstructionExcel 10 W7754 FCU Controllers Electrical Shock Hazard180 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 Plan the System OverviewDetermine Other Bus Devices Required Step No DescriptionLonworks Layout Lay Out Communications and Power WiringGeneral Considerations Prepare Wiring DiagramsPower Wiring Power WiringVendor wire type PlenumLOW 230 XAL-Term ONW Orks TerminationExcel 10 Wall Modules Order EquipmentExcel 10 Sensors Echelon-Based Components and PartsUsing Plug-Ins Configure ControllersOutput Input Fan Equipment ControlMiscellaneous Switching LevelsZone Options Troubleshooting Excel 10 FCU Controllers and Wall Modules TroubleshootingAlarms CommissioningReturntonormal FCU AlarmsManual Mode Broadcasting the Service MessageProcedure Temperature Sensor CalibrationInput Configuration Options Output Configuration OptionsZone Control Options Network Variable BindingAppendix C LON Interface Page NV name Continuous Automode To 100% For the reheat output EN2B-0285GE51 R0909 Byte Ntcnonlinearize NoswitchNtcnonlinearized Byte FivepositionDiwindowclosed Byte DinotusedDioccupiedsensor DiairflowOnestage Byte FloatingTwostage ThreestageRelnotused Byte ReheatFreeuse Twopipe FourpipeUword Absolutemiddle OffsetBypassunoccupie NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Modedisable Modeenable UnsuppressalarmsSuppressalarms OcnulInvalid Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskOFF NUL OFF1OFF2 Byte NormalhcmodeON1OFF2 OFF1ON2Ledoff Ledon Byte NormalfanmodeOpen NowindowClosed Table C4. Output Variables for Excel 10 FCU Controllers Alarmnotifydisabled RtncomfailtempresetRtncomfailsetptoffs RtncomfailschedoccOcbypass Ocstandby Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOFF Notassigned Fieldeffectocc OFF Nofanspeedsw UbyteFieldhwoverride FieldschedoccCtldisabled CtlfanswitchoffOcunoccupied Ocbypass Ocstandby Ocunoccupied Ocbypass Ocstandby OcnulFanoffafteroncmd Not Actice ActiveFanruns ExternalnotacticeInvalid Uword StoffSton Notpressed OFF NoreheatPressed Contactopen Contactclosed UwordInvalid Byte Initial Stlow Stmed SthighDisabled EnabledNoalarm InalarmOpen 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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