Honeywell W7752D specifications ONW Orks Termination, XAL-Term

Page 25

EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Table 14. Output assignments of Excel 10 W7754 FCU Controller for various actuator types

 

output type

 

stage

 

OUT1

 

OUT2

 

 

19

 

20

21

 

22

 

 

 

 

 

 

 

floating

--

close

 

open

close

 

open

 

1-stage

0

--

 

OFF

--

 

OFF

 

1

--

 

ON

--

 

ON

 

 

 

 

 

2-stage

0

OFF

 

OFF

OFF

 

OFF

 

1

OFF

 

ON

OFF

 

ON

 

 

2

ON

 

OFF

ON

 

OFF

 

 

0

OFF

 

OFF

OFF

 

OFF

 

3-stage

1

OFF

 

ON

OFF

 

ON

 

2

ON

 

OFF

ON

 

OFF

 

 

 

 

 

 

3

ON

 

ON

ON

 

ON

 

PWM

--

--

 

PWM

--

 

PWM

 

thermal

--

--

 

ON/OFF

--

 

ON/OFF

LONWORKS Termination

NOTE: The Q7750A Zone Manager has an internal ter-

One or two LONWORKS terminations are required, depending

mination circuit, although jumpers are required at the

on the given LonWorks bus layout.

terminal block to connect it. See form number 95-

Double termination is required only when the network is a

7509 for details.

 

daisy-chain configuration and the total wire length is greater

 

than 1640 ft (500 m). The max. lengths described in Step 2

 

must be adhered to for either a daisy chain or free topology

 

LONWORKS layout. See Fig. 17 for connection details for a

 

doubly terminated bus. See Fig. 18 for connection details for

 

a singly terminated bus.

 

Two different LONWORKS termination modules are available:

• LONWORKS termination module, order no.:

209541B

•LONWORKS connection / termination module (mountable

on DIN rails and in fuse boxes), order no.:

XAL-Term

Fig. 17. Termination Module connections for a doubly-

terminated FTT network

 

ywell

 

Hone

 

m

 

XAL-Ter

3

4

 

removable screw-type

 

 

 

 

3-pole terminal block

L

 

L

 

O

O

 

N

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 shield 0

plug-in jumper

3 4

5

shield 6

LON

Termination

FTT/LPT Bus

FTT/LPT Free

Park Position

Fig. 18. Termination Module connections for a singly-

terminated FTT network

Fig. 16. LONWORKS connection and termination module

23

EN2B-0285GE51 R0909

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Contents Excel Appendix B Configuring for Master/Slave Operation Appendix a Using An LNS tool to Commission a Fan Coil UnitAppendix C LON Interface Revision History 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 General ConfigurationsFan Type 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 WiringPower Wiring Prepare Wiring DiagramsGeneral Considerations 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 ControlZone Options Switching LevelsMiscellaneous 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 ThreestageFreeuse Byte ReheatRelnotused Twopipe FourpipeUword Absolutemiddle OffsetBypassunoccupie NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Modedisable Modeenable UnsuppressalarmsSuppressalarms OcnulOFF NUL Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskInvalid OFF1OFF2 Byte NormalhcmodeON1OFF2 OFF1ON2Ledoff Ledon Byte NormalfanmodeClosed NowindowOpen Table C4. Output Variables for Excel 10 FCU Controllers Alarmnotifydisabled RtncomfailtempresetRtncomfailsetptoffs RtncomfailschedoccOFF Notassigned Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOcbypass Ocstandby Fieldeffectocc OFF Nofanspeedsw UbyteFieldhwoverride FieldschedoccCtldisabled CtlfanswitchoffOcunoccupied Ocbypass Ocstandby Ocunoccupied Ocbypass Ocstandby OcnulFanoffafteroncmd Not Actice ActiveFanruns ExternalnotacticeSton StoffInvalid Uword 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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