Honeywell W7752D Byte Normalhcmode, OFF1OFF2, ON1OFF2, OFF1ON2, ON1ON2, Testposition

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nviSetPtOffset

nviSpaceTemp

nviTest

nviTest

nviTest

nviTest

nviTest

field name

output1_cmd

output1_test_pos

output2_cmd

output2_test_pos reheat_cmd

Table C3. Input Variables for Excel 10 FCU Controllers

engineering units:

digital

 

 

state

default

comments

English (metric) or states plus

or

range

 

 

value

 

 

 

 

 

 

 

 

 

SNVT_temp_p

 

0 (if bound but fails to be

This input variable is used for binding third party nodes to

-18 to 18 DDF (-10 to 10 K)

 

received or at application

authorize them for setpoint shifting. nviSetPtOffset is stored in

589.806 DDF (327.67 K) =

 

restart)

RAM and will be initialized to zero after application restart or

INVALID

 

 

power failure. If nviSetPtOffset is bound and fails to be received

 

 

 

periodically as configured with nciRcvHrtBt, it will be reset to zero.

SNVT_temp_p

 

INVALID

This input variable is the space temperature transmitted from

0 to 104°F (0 to 40°C)

 

(if bound but fails to be

another Excel 10 controller or another node that has a tem-

621.806°F (327.67°C) =

 

received or at application

perature sensor wired to it. If bound or has a value other than

INVALID

 

restart)

INVALID, then it is used as the sensed space temperature instead

 

 

 

of the wired wall module's temperature. nviSpaceTemp may be

 

 

 

set to a value other than INVALID using a LNS tool when

 

 

 

nviSpaceTemp is not bound to set the temperature to a fixed

 

 

 

value.

 

 

 

 

BYTE

 

NORMAL_HC_MODE

This input variable is used by factory test, OEM field test, field

NORMAL_HC_MODE

0

(at application restart)

installation, and field testing to manually command the physical

OFF1_OFF2

1

 

output 1 when the node has been put into manual mode

ON1_OFF2

2

 

(nviManualMode = MODE_MANUAL).

OFF1_ON2

3

 

NORMAL_HC_MODE: output 1 remains in its current position

ON1_ON2

4

 

OFF1_OFF2, ON1_OFF2, OFF1_ON2, ON1_ON2: set the

TESTPOSITION

5

 

individual triacs ON or OFF

 

 

 

TESTPOSITION: sets output based upon output1_test_pos.

 

 

 

 

SNVT_lev_percent

 

0 (at application restart)

This input variable is used for the TESTPOSITION of the

0 to 100%

 

 

output1_cmd and is based upon the configured runtime/cycle

 

 

 

time.

BYTE

 

NORMAL_HC_MODE

Same as output1_cmd for output 2.

NORMAL_HC_MODE

0

(at application restart)

 

OFF1_OFF2

1

 

 

ON1_OFF2

2

 

 

OFF1_ON2

3

 

 

ON1_ON2

4

 

 

TESTPOSITION

5

 

 

SNVT_lev_percent

 

0 (at application restart)

Same as output1_test_pos for output 2

0 to 100%

 

 

 

BYTE

 

NORMAL_HC_MODE

This input variable is used to test the reheat relay.

NORMAL_HC_MODE

0

(at application restart)

 

OFF1_OFF2

1

 

 

ON1_ON2

4

 

 

 

 

 

 

EN2B-0285GE51 R0909

50

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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 Description of Devices Typical system overviewProducts Covered Organization of ManualApplicable Literature Product NamesControl Application Control ProvidedSetpoints Setpoint KnobSetpoint Limits Setpoint from NetworkZEB Energy-Saving Features BypassOccupancy Status Safety Features Operating ModesConstruction Excel 10 W7752 FCU ControllersExcel 10 W7754 FCU Controllers Electrical Shock Hazard180 Controller Performance Specifications General ConfigurationsFan Type Type of Heating and Cooling Equipment Reheat Output Digital InputCommon Temperature Control Master/Slave Controllers Excel 10 Wall Module OptionsAbbreviations and Definitions Overview Plan the SystemDetermine Other Bus Devices Required Step No DescriptionLay Out Communications and Power Wiring Lonworks LayoutPower Wiring Prepare Wiring DiagramsGeneral Considerations Wiring PowerVendor wire type PlenumLOW 230 ONW Orks Termination XAL-TermOrder Equipment Excel 10 Wall ModulesExcel 10 Sensors Echelon-Based Components and PartsConfigure Controllers Using Plug-InsOutput Input Equipment Control FanZone Options Switching LevelsMiscellaneous Troubleshooting Troubleshooting Excel 10 FCU Controllers and Wall ModulesAlarms CommissioningFCU Alarms ReturntonormalBroadcasting the Service Message Manual ModeTemperature Sensor Calibration ProcedureOutput Configuration Options Input Configuration OptionsZone Control Options Network Variable BindingAppendix C LON Interface Page NV name Continuous Automode To 100% For the reheat output EN2B-0285GE51 R0909 Noswitch Byte NtcnonlinearizeNtcnonlinearized Byte FivepositionByte Dinotused DiwindowclosedDioccupiedsensor DiairflowByte Floating OnestageTwostage ThreestageFreeuse Byte ReheatRelnotused Fourpipe TwopipeUword Offset AbsolutemiddleBypassunoccupie NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Modeenable Unsuppressalarms ModedisableSuppressalarms OcnulOFF NUL Rqnormal Rqupdatestatus Rqupdatealarm RqreportmaskInvalid Byte Normalhcmode OFF1OFF2ON1OFF2 OFF1ON2Byte Normalfanmode Ledoff LedonClosed NowindowOpen Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailtempreset AlarmnotifydisabledRtncomfailsetptoffs RtncomfailschedoccOFF Notassigned Almcomfailmanheat Almcomfailmancool AlmhwswmismatchOcbypass Ocstandby OFF Nofanspeedsw Ubyte FieldeffectoccFieldhwoverride FieldschedoccCtlfanswitchoff CtldisabledOcunoccupied Ocbypass Ocstandby Ocunoccupied Ocbypass Ocstandby OcnulNot Actice Active FanoffafteroncmdFanruns ExternalnotacticeSton StoffInvalid Uword OFF Noreheat NotpressedPressed Contactopen Contactclosed UwordStlow Stmed Sthigh Invalid Byte InitialEnabled DisabledNoalarm InalarmAlarm Suppressalarms Alarmnotifydisabled Open NowindowBugver Nodetype Table C5. Unused Variables for Excel 10 FCU Controllers WordAutomation 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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