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