Honeywell W7750A specifications Control Parameters

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74

Table 21. Control Parameters. (Continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Value

Digital

 

E-Vision

 

 

Direct

Hardware

Manual

 

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

User Address

NvName

Field Name

(Metric) or States plus Range

ofState

Stateor

Default

(M, P,S)

Share

Map

Access

Config.

Config.

Test

Comments

 

 

 

Engineering Units: English

 

 

 

 

 

 

 

 

 

 

 

MaxHtRamp

nciAux1SetPt

ubMaxHtRampS0

Degrees F/Hr

 

 

 

8

P

 

X

X

 

 

 

MaxHtRamp is the maximum heat recovery ramp rate in degrees F

 

 

 

0 to 20

 

 

 

 

 

 

 

 

 

 

 

per hour. This value is used to control the adaptive recovery ramp

 

 

 

Degrees C/Hr

 

 

 

 

 

 

 

 

 

 

 

rate during the HEAT recovery period. The setpoint is changed at a

 

 

 

(0 to 11)

 

 

 

 

 

 

 

 

 

 

 

rate in degrees F per hour depending on the outdoor air temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and the MinHtRamp, OdTempMaxHtRamp, and OaTempMinHtRamp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

parameters. If there is no outdoor air temperature sensor available,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then ubMinHtRamp is used as the recovery rate.NOTE: Recovery

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ramping applies between scheduled heating or cooling setpoint

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

changes from OC_UNOCCUPIED to OC_STANDBY,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OC_UNOCCUPIED to OC_OCCUPIED, and OC_STANDBY to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OC_OCCUPIED. Scheduled setpoint changes from OC_OCCUPIED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to OC_UNOCCUPIED or OC_OCCUPIED to OC_STANDBY do not

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

use a ramped setpoint but instead use a step change in setpoint.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Recovery ramps begin before the next scheduled occupancy time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and are ramped from the setpoint for the existing scheduled

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

occupancy state to the setpoint for the next occupancy state.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MinHtRamp

nciAux1SetPt

ubMinHtRampS0

Degrees F/Hr

 

 

 

3

P

 

X

X

 

 

 

MinHtRamp is the minimum heat recovery ramp rate in degrees F

 

 

 

0 to 20

 

 

 

 

 

 

 

 

 

 

 

per hour. This value is used to control the adaptive recovery ramp

 

 

 

Degrees C/Hr

 

 

 

 

 

 

 

 

 

 

 

rate during the HEAT recovery period. The setpoint is changed at a

 

 

 

(0 to 11)

 

 

 

 

 

 

 

 

 

 

 

rate in degrees F per hour depending on the outdoor air temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and the MaxHtRamp, OdTempMaxHtRamp, and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OdTempMinHtRamp parameters. If there is no outdoor air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

temperature sensor available, then MinHtRamp is used as the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

recovery rate. Refer to the NOTE in the comments column for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MaxHtRamp for the conditions that recovery ramping applies to.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OaTempMaxHtRp

nciAux1SetPt

ubOdTempMaxHtRampS0

Degrees F

 

 

 

40

P

 

X

X

 

 

 

OdTempMaxHtRamp is the maximum outdoor air temperature

 

 

 

0 to 100

 

 

 

 

 

 

 

 

 

 

 

parameter that is used to calculate the heat recovery ramp rate

 

 

 

Degrees C

 

 

 

 

 

 

 

 

 

 

 

setpoint. This value is used to control the adaptive recovery ramp

 

 

 

(-18 to 38)

 

 

 

 

 

 

 

 

 

 

 

rate during the HEAT recovery period. The setpoint is changed at a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rate in degrees F per hour depending on the outdoor air temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and the MaxHtRamp, MinHtRamp, and OdTempMinHtRamp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

parameters. If there is no outdoor air temperature sensor available,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then MinHtRamp is used as the recovery rate. Refer to the NOTE in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the comments column for MaxHtRamp for what conditions that

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

recovery ramping applies to.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OaTempMinHtRp

nciAux1SetPt

ubOdTempMinHtRampS0

Degrees F

 

 

 

0

P

 

X

X

 

 

 

OdTempMinHtRamp is the minimum outdoor air temperature

 

 

 

0 to 100

 

 

 

 

 

 

 

 

 

 

 

parameter that is used to calculate the heat recovery ramp rate

 

 

 

Degrees C

 

 

 

 

 

 

 

 

 

 

 

setpoint. This value is used to control the adaptive recovery ramp

 

 

 

(-18 to 38)

 

 

 

 

 

 

 

 

 

 

 

rate during the HEAT recovery period. The setpoint is changed at a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rate in degrees F per hour depending on the outdoor air temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and the MaxHtRamp, MinHtRamp, and OdTempMaxHtRamp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

parameters. If there is no outdoor air temperature sensor available,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then MinHtRamp is used as the recovery rate. Refer to the NOTE in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the comments column for MaxHtRamp for what conditions that

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

recovery ramping applies to.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OaTempClLkOut

nciAux1SetPt

ubOdClLockOutTempS0

Degrees F

Degrees C

 

 

50

P

 

X

X

 

 

 

When the outdoor air temperature is less than OdClLockOutTemp,

 

 

 

0 to 90

(-18 to 32)

 

 

 

 

 

 

 

 

 

 

the cooling is disabled.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Image 74
Contents Excel 72-2958 General Considerations W7750 ControllersAppendices List of Figures 74-2958Setpoint ramping parameters with ramp rate calculation 74-2958List of Tables Description of Devices Typical system overviewControl Application Control ProvidedApplicable Literature Products CoveredOrganization of Manual Form No TitleProduct Names Agency ListingsAbbreviations and Definitions Construction ControllersW7750A DI-1Special Note for the W7750B,C Unit Performance SpecificationsPower Memory Capacity Specified Space Temperature Sensing RangeCPU Excel 10 W7750C Constant Volume AHU Controller Jack DIN rail adapters Lonmark Functional ProfileInputs/Outputs Analog InputsDigital Outputs Digital InputsTriac Outputs on the W7750B,C Models only T7770A1006 Wall ModulesDuct Sensor T7770CT7560A,B construction in in. mm Configurations GeneralConfiguration Options Summary For W7750A,B,C Controllers Heat Pump Control Allowable Heating and Cooling Equipment ConfigurationsStaged HEATING/COOLING Control Modulating HEATING/COOLING ControlEconomizer Control Pneumatic Actuator ControlWall Module Options Occupancy SensorWindow Open/Closed Digital Input MIXED-OUTPUT-TYPE ControlIndoor Air Quality IAQ Override Modes of OperationDirty Filter Monitor Smoke ControlNot OFF ModeDisabled AssignedDetermine Other Bus Devices Required OverviewPlan the System Step No DescriptionLay Out Communications and Power Wiring Lonworks Bus LayoutExcel VAV Cvahu DeviceVA Information Obtained from Power WiringPower Budget Calculation Example ML7984B PWM Valve Actuator VA Ratings For Transformer Sizing Device DescriptionML6161A/B Damper Actuator, 35 lb-in R8242A Contactor Line LossPower wiring details for one Excel 10 per Transformer Nema class 2 transformer voltage output limitsPrepare Wiring Diagrams General ConsiderationsW7750 Controllers Factory Default Digital Outputs Terminal Terminal Number DescriptionConstant 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 noteBrown Orange Lonworks Bus termination wiring options Order EquipmentSensor with Bypass/LED and Lonworks Jack T7770 and T7560 Wall ModulesHoneywell Logo T7770D1018 Echelon Based Components and Parts Accessories SensorsAccessories Troubleshooting Excel 10 Controllers and Wall Modules Configure ControllersTroubleshooting CablingResistance Value ohms AlarmsExcel 10 Alarms Broadcasting the Service Message W7750 Controller Status LEDT7770C,D Wall Module Bypass Pushbutton and Override LED Appendix A. Using E-Vision to Commission a W7750 ControllerSetting the Pid Parameters Sensor CalibrationAppendix B. Sequences of Operation Common Operations Economizer Room Temperature Sensor RmTempHeating IAQ OptionSetpoint Limits LoSetptLim and HiSetptLim Bypass Mode StatusOvrd and StatusLedRemote Setpoint RmtStptPot BypassTimeNot Assigned Continuous Unoccupied ModeOccupancy Mode and Manual Override Arbitration Bypass OccupiedSchedule Master SchedMaster Recovery Ramping for Heat Pump SystemsTime Clock OccTimeClock Setpoint RampingFAN Operation Window Sensor StatusWndwSmoke Control Demand Limit Control DLCDirty Filter Monitor Temperature Control OperationsSee for a diagram of a typical W7750 Unit TWO Stages Staged Cooling ControlONE Stage Three StagesPulse Width Modulating PWM Control Cascade Control of Modulating COOLING/HEATINGSeries 60 Modulating Control Outdoor AIR Lockout of HEATING/COOLINGFreeze Stat Economizer ENABLE/DISABLE ControlIndoor AIR Quality IAQ Override Discharge AIR LOW Limit ControlEnergy Management Points Address Input Output Points AddressControl Parameters Address Status Points AddressMappable User Addresses and Table Number CO2 Concentration Relative TemperatureAir Flow EnthalpyValid states and the corresponding Application reset therefore, these points canPlaced in manual mode through a menu Enumerated values are shownNvName Field Name DefaultInput/Output Points Comments255 NciIoSelect DigitalIn2 NciIoSelect DigitalIn1Occsensor Shcedmasterin Occsensor UnuseddiCOOLSTAGE3 COOLSTAGE1COOLSTAGE2 COOLSTAGE4Sixtyfifty SiinvalidTrue PPM SiinvalidFalse StatusDI3 NvoIO UbDigitalIn EconEnSw NvoIO EconEnableInPosition when poor indoor air quality is detected OccSensr NvoIODefault Comments NvNameControl Parameters MinClRamp NciAux1SetPt UbMinClRampS0 Degrees F/Hr OdEnthalpyEnableMaxClRamp NciAux1SetPt UbMaxClRampS0 Degrees F/Hr MaxClRamp, OdTempMaxClRamp,PPM Gain for the cooling control loop Discharge air temperature cascade control loopGainCoolProp NciAux2SetPt UbKpCoolS2 Degrees F Degrees C GainHeatProp NciAux2SetPt UbKpHeatS2 Degrees F Degrees CEnergy Management Points Auxiliary functions. nviFree1 controls the FREE1OUT Refer to WSHPEnable.valueNviFree1 Value Network variable input failsRefer to nviTimeClk.value NviTimeClk ValueDestTimeClk NviTimeClk State 255 SrcTimeClkCt NvoTimeClk ValueStatus Points Bit Offset = FrostProtectAlrm Alarmbit1Bit Offset = SensorFailAlrm Bit Offset = InvalidSetPtAlrmSmokealarm NoalarmNodedisabled UpdateallfieldsHeat DisabledmodeStartupwait CoolNciAux1SetPts.ubOdEnthalpyEnableS2 StatusEconEn NvoData1 EconEnableAir flow switch is configured StatusManOcc NvoData1 NetManOccCoolStgsOn NvoData1 CoolStagesOn HeatStgsOn NvoData1 HeatStagesOnAuxiliary heating stages are turned on For both heating or coolingController mode is switched to Freezeprotect Is 1, the algorithm controls as per the settings foundNciConfig.SmokeControl MonitorSw NvoData1 MonSwitchSpacetempfield BypasstimerfieldTempcontrolptfield DischargetempfieldUbinvalid NvoError Errorbit0 StatusError NvoError Errorbit0SpaceTempError Bit Offset = Temperature SetPtError NvoError Errorbit0Are disabled as if the sensor was not configured NvoError Errorbit1Bit Offset = RtnEnthalpyError NvoError Errorbit1 Bit Offset = SpaceCO2Error NvoError Errorbit1Bit Offset = NvTodEventError NvoError Errorbit3 Bit Offset = NvWindowError NvoError Errorbit2Bit Offset = NvDlcShedError NvoError Errorbit2 Bit Offset = NvByPassError NvoError Errorbit3Cfgnul CfglocalCfgexternal Calibration PointsConfiguration Parameters False True CascCntrl NciConfig CascadeControl DisMinHtTime NciConfig DisableHeatMinTimeDisMinClTime NciConfig DisableCoolMinTime UseRaTempCtl NciConfigNone Normal Last NETOffset Absolutemiddle BypassonlyLonmark /Open System Points Hvacmrngwrmup Hvacprecool Hvaccool Hvacnightpurge Hvacnul HvacautoHvacheat HvacoffSNVTtempp 14 to 74-2958 100DestRmTemp NviSpaceTemp Degrees F SrcRmTemp NvoSpaceTemp Degrees FHvactest Hvacauto HvacnulHvacmrngwrmup Alarmnotifydisabled 255 Not configured 74-2958 NvoStatus Electricalfault103 NvoStatus Inalarm NvoStatus UnabletomeasureSwon SrcEconEnable NvoEcon State On other nodes. If the economizer function is configured byCorresponding economizer function is not enabled because SrcEconEnCt NvoEcon ValueDirect Access And Special Points OFF Data Share Points = including mapped points and others for Approximate Memory Size Estimating Procedure=using One-to-Many and not using points Mapped points = number of mapped points per ExcelSensor Type Sensor Resistance Versus Temperature Resistance OhmsResistance Sensors Sensor UseT7770B,C 10K ohm setpoint potentiometer Relative Offset Setpoint TemperatureDirect Setpoint Temperature Above and Below Setpoint Resistance OhmsSensor Voltage Versus Humidity Relative Humidity Percentage Voltage/Current SensorsSensor Voltage Versus Humidity Humidity Percentage Sensor Current Versus Enthalpy volts Enthalpy mA 113 74-2958MAmAmAmA AmA mA mA T7242 or equivalent74-2958 114 Sensor Voltage Versus Input Voltage To A/D Voltage to A/D Inw Sensor Voltage Vdc Versus Pressure InwPressure Inw kPa Sensor Voltage Vdc 50.0.13