Honeywell W7752D Offset, Absolutemiddle, Nobutton, Bypassunoccupied, Lastwins, Networkwins

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciWallMod

nciWallMod

nciWallMod

nciWallMod

nciWallMod

field name

use_wall_mod_st_pt

set_pnt_knob

override_type

override_priority

display_type

Table C2. Configuration Variables for Excel 10 FCU Controllers

engineering units:

digital

 

 

state

default

comments

English (metric) or states

or

plus range

 

 

value

 

 

 

 

 

Bit

 

YES

This configuration variable specifies whether the setpoint used is from

NO

0

 

the knob on the wall module connected to the controller or from the

YES

1

 

network via nciTempSetPts. If set to NO, all setpoints to be used come

 

 

 

from the network via nciTempSetPts. If set to YES, an additional option

 

 

 

set_pnt_knob must be set to specify type of setpoint adjustment (see

 

 

 

below).

 

 

 

 

2 Bits

 

OFFSET

This configuration variable specifies specifies the usage of the setpoint

OFFSET

0

 

knob on the wall module for the occupied setpoint. OFFSET specifies a

ABSOLUTE_MIDDLE

2

 

relative scale on the wall module where the setpoint is calculated by

 

 

 

adding the setpoint potentiometer value (± 5 K) to the appropriate

 

 

 

value of nciTempSetPts. ABSOLUTE_MIDDLE specifies an absolute

 

 

 

scale on the wall module. The setpoint knob directly determines the

 

 

 

center point of occupied cooling and heating setpoints. The respective

 

 

 

cooling and heating setpoint is determined by the setpoint knob

 

 

 

position adding or subtracting half of the user selectable ZEB defined

 

 

 

in nciSetPnts.<occ_mode>_cool or nciSetPnts.<occ_mode>_heat .

 

 

 

This applies to <occ_mode> OCCUPIED and STANDBY.

 

 

 

 

2 Bits

 

BYPASS_UNOCCUPIE

This configuration variable specifies the behavior of the override

NO_BUTTON

0

D

button. BYPASS_UNOCCUPIED allows overriding the current

BYPASS_UNOCCUPIED

1

 

occupancy mode to OCCUPIED for a configurable bypass time, or

BYPASS

2

 

causing a permanent override to UNOCCUPIED. BYPASS allows only

 

 

 

the temporary override to OCCUPIED and canceling it.

 

 

 

 

Bit

 

LAST_WINS

This configuration variable specifies the priority of the local (wall

LAST_WINS

0

 

module push-button) or central (network interface) override. If

NETWORK_WINS

1

 

NETWORK_WINS is set and the network sends value NUL, then the

 

 

 

override button is active.

 

 

 

 

Bit

 

LED_OVERRIDE

This configuration variable specifies the display of occupancy and/or

LED_OVERRIDE

0

 

override. LED_OVERRIDE shows the override from the bypass button

LED_OCCUPANCY

1

 

or from the network. LED_OCCUPANCY shows the effective

LCD_DISPLAY

2

 

occupancy mode. LCD_DISPLAY is only used for T7560 Wall Modules.

 

 

 

The display shows the occupancy mode with different symbols, and the

 

 

 

override mode with flashing symbols.

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 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 Configurations GeneralFan 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 LayoutPrepare Wiring Diagrams Power WiringGeneral 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 FanSwitching Levels Zone OptionsMiscellaneous 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 ThreestageByte Reheat FreeuseRelnotused Fourpipe TwopipeUword Offset AbsolutemiddleBypassunoccupie NobuttonTable C3. Input Variables for Excel 10 FCU Controllers Modeenable Unsuppressalarms ModedisableSuppressalarms OcnulRqnormal Rqupdatestatus Rqupdatealarm Rqreportmask OFF NULInvalid Byte Normalhcmode OFF1OFF2ON1OFF2 OFF1ON2Byte Normalfanmode Ledoff LedonNowindow ClosedOpen Table C4. Output Variables for Excel 10 FCU Controllers Rtncomfailtempreset AlarmnotifydisabledRtncomfailsetptoffs RtncomfailschedoccAlmcomfailmanheat Almcomfailmancool Almhwswmismatch OFF NotassignedOcbypass Ocstandby OFF Nofanspeedsw Ubyte FieldeffectoccFieldhwoverride FieldschedoccCtlfanswitchoff CtldisabledOcunoccupied Ocbypass Ocstandby Ocunoccupied Ocbypass Ocstandby OcnulNot Actice Active FanoffafteroncmdFanruns ExternalnotacticeStoff StonInvalid 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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