DI-1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

W7750A

26	25

NETWORK
DO

24 VAC

21 24 VAC COM

NOT USED

E GND

LED 2

BYPASS 3

SNSR 4

GND 5

SET PT 6

AI-1 OHM

GND

GND 10

GND 11

DI-2 12

NOT USED

L
ONW
	ORKS
BUS
14	15

LON

JACK

Fig. 3. Excel 10 W7750A Constant Volume AHU Controller.

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Page 12

Image 12

Contents

Excel General Considerations W7750 Controllers Appendices72-2958 List of Figures 74-2958 Setpoint ramping parameters with ramp rate calculation 74-2958 List of Tables Description of Devices Typical system overview Control Application Control Provided Products Covered Organization of ManualApplicable Literature Form No Title Product Names Agency Listings Abbreviations and Definitions Construction Controllers W7750A DI-1 Performance Specifications PowerSpecial Note for the W7750B,C Unit Specified Space Temperature Sensing Range CPUMemory Capacity Excel 10 W7750C Constant Volume AHU Controller Jack DIN rail adapters Lonmark Functional Profile Inputs/Outputs Analog Inputs Digital Inputs Triac Outputs on the W7750B,C Models onlyDigital Outputs Wall Modules Duct SensorT7770A1006 T7770C T7560A,B construction in in. mm Configurations General Configuration Options Summary For W7750A,B,C Controllers Allowable Heating and Cooling Equipment Configurations Staged HEATING/COOLING ControlHeat Pump Control Modulating HEATING/COOLING Control Economizer Control Pneumatic Actuator Control Occupancy Sensor Window Open/Closed Digital InputWall Module Options MIXED-OUTPUT-TYPE Control Modes of Operation Dirty Filter MonitorIndoor Air Quality IAQ Override Smoke Control OFF Mode DisabledNot Assigned Overview Plan the SystemDetermine Other Bus Devices Required Step No Description Lay Out Communications and Power Wiring Lonworks Bus Layout Excel VAV Cvahu Power Wiring Power Budget Calculation ExampleDeviceVA Information Obtained from VA Ratings For Transformer Sizing Device Description ML6161A/B Damper Actuator, 35 lb-in R8242A ContactorML7984B PWM Valve Actuator Line Loss Power wiring details for one Excel 10 per Transformer Nema class 2 transformer voltage output limits Prepare Wiring Diagrams General Considerations W7750 Controllers Factory Default Digital Outputs Terminal Terminal Number Description Constant Volume AHU Controller ML6161 Floating Actuator COM CCW Load Controller Power Heat Wall Economizer Damper PWM Actuator Power Signal W7750C Constant Lonworks Bus Termination Module Pneumatic transducer to W7750B,C Shown, see triangle note Brown Orange Lonworks Bus termination wiring options Order Equipment T7770 and T7560 Wall Modules Honeywell Logo T7770D1018Sensor with Bypass/LED and Lonworks Jack Accessories Sensors AccessoriesEchelon Based Components and Parts Configure Controllers TroubleshootingTroubleshooting Excel 10 Controllers and Wall Modules Cabling Alarms Excel 10 AlarmsResistance Value ohms Broadcasting the Service Message W7750 Controller Status LED Appendix A. Using E-Vision to Commission a W7750 Controller Setting the Pid ParametersT7770C,D Wall Module Bypass Pushbutton and Override LED Sensor Calibration Appendix B. Sequences of Operation Common Operations Room Temperature Sensor RmTemp HeatingEconomizer IAQ Option Bypass Mode StatusOvrd and StatusLed Remote Setpoint RmtStptPotSetpoint Limits LoSetptLim and HiSetptLim BypassTime Continuous Unoccupied Mode Occupancy Mode and Manual Override ArbitrationNot Assigned Bypass Occupied Recovery Ramping for Heat Pump Systems Time Clock OccTimeClockSchedule Master SchedMaster Setpoint Ramping Window Sensor StatusWndw Smoke ControlFAN Operation Demand Limit Control DLC Temperature Control Operations See for a diagram of a typical W7750 UnitDirty Filter Monitor Staged Cooling Control ONE StageTWO Stages Three Stages Cascade Control of Modulating COOLING/HEATING Series 60 Modulating ControlPulse Width Modulating PWM Control Outdoor AIR Lockout of HEATING/COOLING Economizer ENABLE/DISABLE Control Indoor AIR Quality IAQ OverrideFreeze Stat Discharge AIR LOW Limit Control Input Output Points Address Control Parameters AddressEnergy Management Points Address Status Points Address Mappable User Addresses and Table Number Relative Temperature Air FlowCO2 Concentration Enthalpy Application reset therefore, these points can Placed in manual mode through a menuValid states and the corresponding Enumerated values are shown Default Input/Output PointsNvName Field Name Comments NciIoSelect DigitalIn1 Occsensor Shcedmasterin255 NciIoSelect DigitalIn2 Occsensor Unuseddi COOLSTAGE1 COOLSTAGE2COOLSTAGE3 COOLSTAGE4 Sixtyfifty Siinvalid PPM Siinvalid FalseTrue EconEnSw NvoIO EconEnableIn Position when poor indoor air quality is detectedStatusDI3 NvoIO UbDigitalIn OccSensr NvoIO Default Comments NvName Control Parameters OdEnthalpyEnable MaxClRamp NciAux1SetPt UbMaxClRampS0 Degrees F/HrMinClRamp NciAux1SetPt UbMinClRampS0 Degrees F/Hr MaxClRamp, OdTempMaxClRamp, PPM Discharge air temperature cascade control loop GainCoolProp NciAux2SetPt UbKpCoolS2 Degrees F Degrees CGain for the cooling control loop GainHeatProp NciAux2SetPt UbKpHeatS2 Degrees F Degrees C Energy Management Points Refer to WSHPEnable.value NviFree1 ValueAuxiliary functions. nviFree1 controls the FREE1OUT Network variable input fails NviTimeClk Value DestTimeClk NviTimeClk StateRefer to nviTimeClk.value 255 SrcTimeClkCt NvoTimeClk Value Status Points Alarmbit1 Bit Offset = SensorFailAlrmBit Offset = FrostProtectAlrm Bit Offset = InvalidSetPtAlrm Noalarm NodedisabledSmokealarm Updateallfields Disabledmode StartupwaitHeat Cool StatusEconEn NvoData1 EconEnable Air flow switch is configuredNciAux1SetPts.ubOdEnthalpyEnableS2 StatusManOcc NvoData1 NetManOcc HeatStgsOn NvoData1 HeatStagesOn Auxiliary heating stages are turned onCoolStgsOn NvoData1 CoolStagesOn For both heating or cooling Is 1, the algorithm controls as per the settings found NciConfig.SmokeControlController mode is switched to Freezeprotect MonitorSw NvoData1 MonSwitch Bypasstimerfield TempcontrolptfieldSpacetempfield Dischargetempfield Ubinvalid StatusError NvoError Errorbit0 SpaceTempErrorNvoError Errorbit0 Bit Offset = Temperature SetPtError NvoError Errorbit0 NvoError Errorbit1 Bit Offset = RtnEnthalpyError NvoError Errorbit1Are disabled as if the sensor was not configured Bit Offset = SpaceCO2Error NvoError Errorbit1 Bit Offset = NvWindowError NvoError Errorbit2 Bit Offset = NvDlcShedError NvoError Errorbit2Bit Offset = NvTodEventError NvoError Errorbit3 Bit Offset = NvByPassError NvoError Errorbit3 Cfglocal CfgexternalCfgnul Calibration Points Configuration Parameters False True DisMinHtTime NciConfig DisableHeatMinTime DisMinClTime NciConfig DisableCoolMinTimeCascCntrl NciConfig CascadeControl UseRaTempCtl NciConfig Last NET Offset AbsolutemiddleNone Normal Bypassonly Lonmark /Open System Points Hvacauto HvacheatHvacmrngwrmup Hvacprecool Hvaccool Hvacnightpurge Hvacnul Hvacoff 74-2958 100 DestRmTemp NviSpaceTemp Degrees FSNVTtempp 14 to SrcRmTemp NvoSpaceTemp Degrees F Hvacauto Hvacnul HvacmrngwrmupHvactest Alarmnotifydisabled NvoStatus Electricalfault 103 NvoStatus Inalarm255 Not configured 74-2958 NvoStatus Unabletomeasure Swon On other nodes. If the economizer function is configured by Corresponding economizer function is not enabled becauseSrcEconEnable NvoEcon State SrcEconEnCt NvoEcon Value Direct Access And Special Points OFF Data Share Points Approximate Memory Size Estimating Procedure =using One-to-Many and not using points= including mapped points and others for Mapped points = number of mapped points per Excel Sensor Resistance Versus Temperature Resistance Ohms Resistance SensorsSensor Type Sensor Use Offset Setpoint Temperature Direct Setpoint TemperatureT7770B,C 10K ohm setpoint potentiometer Relative Above and Below Setpoint Resistance Ohms Voltage/Current Sensors Sensor Voltage Versus Humidity Humidity PercentageSensor Voltage Versus Humidity Relative Humidity Percentage Sensor Current Versus Enthalpy volts Enthalpy mA 113 74-2958 T7242 or equivalent 74-2958 114MAmAmAmA AmA mA mA Sensor Voltage Versus Input Voltage To A/D Voltage to A/D Sensor Voltage Vdc Versus Pressure Inw Pressure Inw kPa Sensor Voltage VdcInw 50.0.13

Honeywell W7750A specifications DI-1

Models: W7750A

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

W7750A

DI-1

Fig. 3. Excel 10 W7750A Constant Volume AHU Controller.

74-2958— 1