Honeywell W7752D specifications 230

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Terminal Block Assignment and Wiring Example for the W7754 Controller

Table 13 lists the terminals and their functions of the Excel 10 W7754 FCU Controller. Table 14 lists wiring information for all possible actuator types.

Table 13. W7754 Controller: Overview of terminals and functions (by model)

 

terminal

 

function

 

 

 

model

 

 

 

#

 

 

K

L

 

M

 

N

P

 

 

 

 

 

 

1+2

 

receiving/sending data on the LONWORKS network; removable plug

3

3

3

 

3

3

3

 

a digital input, configurable (using the LNS plug-in) to read input e.g. from a

3

3

3

 

3

3

 

window contact, an occupancy sensor, etc.

 

 

 

 

 

 

 

 

 

 

 

4

 

an analog input, permanently configured to read input from a wall module's

3

3

3

 

3

3

 

temperature setpoint adjustment knob

 

 

 

 

 

 

 

 

 

 

 

5

 

an analog input, permanently configured to read input from a room temperature

3

3

3

 

3

3

 

sensor

 

 

 

 

 

 

 

 

 

 

 

6

 

GND serving terminals 4, 5, 9, 10, and 11

3

3

3

 

3

3

7

 

not used

--

--

--

 

--

--

8

 

GND serving terminal 3

3

3

3

 

3

3

9

 

a digital output, permanently configured to write output switching the wall module's

3

3

3

 

3

3

 

 

 

LED ON/OFF

 

 

 

 

 

 

 

 

 

 

an analog input, permanently configured to read input on whether the wall

 

 

 

 

 

 

 

10

 

module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,

3

3

3

 

3

3

 

or HIGH and whether the wall module's "occupancy override" button has been

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pressed

 

 

 

 

 

 

 

11 (1)

 

a digital input, permanently configured to read input on whether a window contact

3

3

3

 

3

3

 

 

 

is "open" or "closed"

 

 

 

 

 

 

 

12

 

not used

--

--

--

 

--

--

13+14

 

relay 4, permanently configured to write output to a hardwired electrical reheat

--

--

--

 

--

3

 

coil, switching it ON/OFF

 

 

 

 

 

 

 

 

 

 

 

15

 

a common terminal for terminals 16, 17, and 18

3

3

3

 

3

3

16 (2)

 

relay 3, permanently configured to write output to a three-speed fan, setting it to

3

3

3

 

3

3

 

 

 

HIGH

 

 

 

 

 

 

 

17 (2)

 

relay 2, permanently configured to write output to a three-speed fan, setting it to

3

3

3

 

3

3

 

 

 

MEDIUM

 

 

 

 

 

 

 

18 (2)

 

relay 1, permanently configured to write output to a three-speed fan, setting it to

3

3

3

 

3

3

 

 

 

LOW

 

 

 

 

 

 

 

19

 

a triac output, permanently configured to write output to OUT1, closing it

--

--

--

 

--

3

20

 

a triac output, permanently configured to write output to OUT1, opening it

--

3

--

 

3

3

21

 

a triac output, permanently configured to write output to OUT2, closing it

--

--

--

 

--

3

22

 

a triac output, permanently configured to write output to OUT2, opening it

3

3

--

 

3

3

23

 

a common terminal for terminals 19 and 20

3

3

--

 

3

3

24

 

a common terminal for terminals 21 and 22

3

3

--

 

3

3

25

 

"N" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug

230

24

230

 

230

230

26

 

"L" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug

230

24

230

 

230

230

(1)This digital input can be enabled / disabled using the right DIP switch located on the top of the controller.

(2)If all three relays (terminals 16, 17, and 18) are switched OFF, the three-speed fan will likewise be switched OFF.

Additionally, the W7754K1001 features an extra socket (located to the left of the terminal blocks) containing a digital output suitable for attachment to a solid-state relay employed for low-voltage PWM control in high-current electrical reheat applications.

Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the outputs have been configured, the corresponding devices can be directly connected to them.

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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