Contents
Excel
72-2958
General Considerations W7750 Controllers
Appendices
74-2958
List of Figures
74-2958
Setpoint ramping parameters with ramp rate calculation
List of Tables
Typical system overview
Description of Devices
Control Provided
Control Application
Form No Title
Products Covered
Organization of Manual
Applicable Literature
Agency Listings
Product Names
Abbreviations and Definitions
Controllers
Construction
DI-1
W7750A
Special Note for the W7750B,C Unit
Performance Specifications
Power
Memory Capacity
Specified Space Temperature Sensing Range
CPU
Excel 10 W7750C Constant Volume AHU Controller
Jack
Lonmark Functional Profile
DIN rail adapters
Analog Inputs
Inputs/Outputs
Digital Outputs
Digital Inputs
Triac Outputs on the W7750B,C Models only
T7770C
Wall Modules
Duct Sensor
T7770A1006
T7560A,B construction in in. mm
General
Configurations
Configuration Options Summary For W7750A,B,C Controllers
Modulating HEATING/COOLING Control
Allowable Heating and Cooling Equipment Configurations
Staged HEATING/COOLING Control
Heat Pump Control
Pneumatic Actuator Control
Economizer Control
MIXED-OUTPUT-TYPE Control
Occupancy Sensor
Window Open/Closed Digital Input
Wall Module Options
Smoke Control
Modes of Operation
Dirty Filter Monitor
Indoor Air Quality IAQ Override
Assigned
OFF Mode
Disabled
Not
Step No Description
Overview
Plan the System
Determine Other Bus Devices Required
Lonworks Bus Layout
Lay Out Communications and Power Wiring
Excel VAV Cvahu
DeviceVA Information Obtained from
Power Wiring
Power Budget Calculation Example
Line Loss
VA Ratings For Transformer Sizing Device Description
ML6161A/B Damper Actuator, 35 lb-in R8242A Contactor
ML7984B PWM Valve Actuator
Nema class 2 transformer voltage output limits
Power wiring details for one Excel 10 per Transformer
General Considerations
Prepare Wiring Diagrams
W7750 Controllers
Terminal Terminal Number Description
Factory Default Digital Outputs
Constant Volume AHU Controller
ML6161 Floating Actuator COM CCW Load Controller Power Heat
Wall
Economizer Damper PWM Actuator Power Signal
W7750C Constant
Pneumatic transducer to W7750B,C Shown, see triangle note
Lonworks Bus Termination Module
Brown Orange
Order Equipment
Lonworks Bus termination wiring options
Sensor with Bypass/LED and Lonworks Jack
T7770 and T7560 Wall Modules
Honeywell Logo T7770D1018
Echelon Based Components and Parts
Accessories Sensors
Accessories
Cabling
Configure Controllers
Troubleshooting
Troubleshooting Excel 10 Controllers and Wall Modules
Resistance Value ohms
Alarms
Excel 10 Alarms
W7750 Controller Status LED
Broadcasting the Service Message
Sensor Calibration
Appendix A. Using E-Vision to Commission a W7750 Controller
Setting the Pid Parameters
T7770C,D Wall Module Bypass Pushbutton and Override LED
Appendix B. Sequences of Operation
Common Operations
IAQ Option
Room Temperature Sensor RmTemp
Heating
Economizer
BypassTime
Bypass Mode StatusOvrd and StatusLed
Remote Setpoint RmtStptPot
Setpoint Limits LoSetptLim and HiSetptLim
Bypass Occupied
Continuous Unoccupied Mode
Occupancy Mode and Manual Override Arbitration
Not Assigned
Setpoint Ramping
Recovery Ramping for Heat Pump Systems
Time Clock OccTimeClock
Schedule Master SchedMaster
Demand Limit Control DLC
Window Sensor StatusWndw
Smoke Control
FAN Operation
Dirty Filter Monitor
Temperature Control Operations
See for a diagram of a typical W7750 Unit
Three Stages
Staged Cooling Control
ONE Stage
TWO Stages
Outdoor AIR Lockout of HEATING/COOLING
Cascade Control of Modulating COOLING/HEATING
Series 60 Modulating Control
Pulse Width Modulating PWM Control
Discharge AIR LOW Limit Control
Economizer ENABLE/DISABLE Control
Indoor AIR Quality IAQ Override
Freeze Stat
Status Points Address
Input Output Points Address
Control Parameters Address
Energy Management Points Address
Mappable User Addresses and Table Number
Enthalpy
Relative Temperature
Air Flow
CO2 Concentration
Enumerated values are shown
Application reset therefore, these points can
Placed in manual mode through a menu
Valid states and the corresponding
Comments
Default
Input/Output Points
NvName Field Name
Occsensor Unuseddi
NciIoSelect DigitalIn1
Occsensor Shcedmasterin
255 NciIoSelect DigitalIn2
COOLSTAGE4
COOLSTAGE1
COOLSTAGE2
COOLSTAGE3
Siinvalid
Sixtyfifty
True
PPM Siinvalid
False
OccSensr NvoIO
EconEnSw NvoIO EconEnableIn
Position when poor indoor air quality is detected
StatusDI3 NvoIO UbDigitalIn
NvName
Default Comments
Control Parameters
MaxClRamp, OdTempMaxClRamp,
OdEnthalpyEnable
MaxClRamp NciAux1SetPt UbMaxClRampS0 Degrees F/Hr
MinClRamp NciAux1SetPt UbMinClRampS0 Degrees F/Hr
PPM
GainHeatProp NciAux2SetPt UbKpHeatS2 Degrees F Degrees C
Discharge air temperature cascade control loop
GainCoolProp NciAux2SetPt UbKpCoolS2 Degrees F Degrees C
Gain for the cooling control loop
Energy Management Points
Network variable input fails
Refer to WSHPEnable.value
NviFree1 Value
Auxiliary functions. nviFree1 controls the FREE1OUT
255 SrcTimeClkCt NvoTimeClk Value
NviTimeClk Value
DestTimeClk NviTimeClk State
Refer to nviTimeClk.value
Status Points
Bit Offset = InvalidSetPtAlrm
Alarmbit1
Bit Offset = SensorFailAlrm
Bit Offset = FrostProtectAlrm
Updateallfields
Noalarm
Nodedisabled
Smokealarm
Cool
Disabledmode
Startupwait
Heat
StatusManOcc NvoData1 NetManOcc
StatusEconEn NvoData1 EconEnable
Air flow switch is configured
NciAux1SetPts.ubOdEnthalpyEnableS2
For both heating or cooling
HeatStgsOn NvoData1 HeatStagesOn
Auxiliary heating stages are turned on
CoolStgsOn NvoData1 CoolStagesOn
MonitorSw NvoData1 MonSwitch
Is 1, the algorithm controls as per the settings found
NciConfig.SmokeControl
Controller mode is switched to Freezeprotect
Dischargetempfield
Bypasstimerfield
Tempcontrolptfield
Spacetempfield
Ubinvalid
Bit Offset = Temperature SetPtError NvoError Errorbit0
StatusError NvoError Errorbit0
SpaceTempError
NvoError Errorbit0
Bit Offset = SpaceCO2Error NvoError Errorbit1
NvoError Errorbit1
Bit Offset = RtnEnthalpyError NvoError Errorbit1
Are disabled as if the sensor was not configured
Bit Offset = NvByPassError NvoError Errorbit3
Bit Offset = NvWindowError NvoError Errorbit2
Bit Offset = NvDlcShedError NvoError Errorbit2
Bit Offset = NvTodEventError NvoError Errorbit3
Calibration Points
Cfglocal
Cfgexternal
Cfgnul
Configuration Parameters
False True
UseRaTempCtl NciConfig
DisMinHtTime NciConfig DisableHeatMinTime
DisMinClTime NciConfig DisableCoolMinTime
CascCntrl NciConfig CascadeControl
Bypassonly
Last NET
Offset Absolutemiddle
None Normal
Lonmark /Open System Points
Hvacoff
Hvacauto
Hvacheat
Hvacmrngwrmup Hvacprecool Hvaccool Hvacnightpurge Hvacnul
SrcRmTemp NvoSpaceTemp Degrees F
74-2958 100
DestRmTemp NviSpaceTemp Degrees F
SNVTtempp 14 to
Hvactest
Hvacauto Hvacnul
Hvacmrngwrmup
Alarmnotifydisabled
NvoStatus Unabletomeasure
NvoStatus Electricalfault
103 NvoStatus Inalarm
255 Not configured 74-2958
Swon
SrcEconEnCt NvoEcon Value
On other nodes. If the economizer function is configured by
Corresponding economizer function is not enabled because
SrcEconEnable NvoEcon State
Direct Access And Special Points
OFF
Data Share Points
Mapped points = number of mapped points per Excel
Approximate Memory Size Estimating Procedure
=using One-to-Many and not using points
= including mapped points and others for
Sensor Use
Sensor Resistance Versus Temperature Resistance Ohms
Resistance Sensors
Sensor Type
Above and Below Setpoint Resistance Ohms
Offset Setpoint Temperature
Direct Setpoint Temperature
T7770B,C 10K ohm setpoint potentiometer Relative
Sensor Voltage Versus Humidity Relative Humidity Percentage
Voltage/Current Sensors
Sensor Voltage Versus Humidity Humidity Percentage
113 74-2958
Sensor Current Versus Enthalpy volts Enthalpy mA
MAmAmAmA AmA mA mA
T7242 or equivalent
74-2958 114
Sensor Voltage Versus Input Voltage To A/D Voltage to A/D
50.0.13
Sensor Voltage Vdc Versus Pressure Inw
Pressure Inw kPa Sensor Voltage Vdc
Inw