VisionPro IAQ Setup Guide

Honeywell Thermostat: YTH9421 VisionPro IAQ

Re: Installer Setup

To Enter Installer Setup:

Setup# Description Values
110 Zone Number
  • 0 = Not Zoned
  • 1 = Master Controller
  • 2-9 = Satellite Stat
120 First 2 digits of Year
  • 20
130 Last 2 digits of Year
140 Calendar Month
  • 01 - 12
150 Day of the Month
  • 01 - 31
160

Schedule Options
  • 0=Non-Prog
  • 4=Programmable
165 Energy Start Schedule
  • 0 = No
  • 1 = Yes
172 System Type
  • 1=Conventional
  • 2=Heat Pump
  • 3=Heat only (no fan)
  • E=Auto Discovery
173 Heat Pump Type
  • 0=Air to Air
  • 1=Geothermal
174 Compressor Stages
  • 0, 1 or 2
  • E = Auto Discovery
176 Conv / Aux Stages
  • 0, 1, 2 or 3
  • E = Auto Discovery
180

Fan Operation
  • 0=Gas
  • 1=Electric
190

Reversing Valve
  • 0=Cooling
  • 1=Heating
200

Backup Heat
  • 0=Electric
  • 1=Gas
210 Fossil Fuel Control
  • 0=Thermostat-controlled
  • 1=External control
220 Compressor 1 CPH
  • 1, 2, 3, 4, 5 or 6
230 Compressor 2 CPH
  • 1, 2, 3, 4, 5 or 6
240

Heat 1 Cycles/Hr
  • 1=Steam
  • 3=90% Furnace
  • 5=80% Furnace
  • 9=Electric
250 Heat 2 Cycles/Hr
  • 1=Steam
  • 3=90% Furnace
  • 5=80% Furnace
  • 9=Electric
260 Aux Heat CPH
  • 1=Steam
  • 3=90% Furnace
  • 5=80% Furnace
  • 9=Electric
270 Em Heat CPH
  • 1=Steam
  • 3=90% Furnace
  • 5=80% Furnace
  • 9=Electric
280 Backlight
  • 0=Automatic
  • 1=Continuous
290

Additional Choices
  • 0=Main Menu
  • 1=All Choices
300

Changeover Type
  • 0=Manual
  • 1=Automatic
310 Changeover Deadband
  • 2, 3, 4, 5, 6 ,7, 8 or 9
320 Temperature Scale
  • 0=Farenheit
  • 1=Celsius
330 Daylight Savings
  • 0=Off
  • 1=Old Dates
  • 2=New Dates
340 Remote Temperature
  • 0=None
  • 1=Remote Sensor
  • 2=Average
342 Outdoor Temperature
  • 0=None
  • 1=Yes
  • E=Auto Discovery
345 Dual Fuel Control
  • 0=No Droop
  • 1=Droop
  • 2=Droop w/ Aux Lockout
346 Dual Fuel Upstage Time
  • 0 - 16 Hrs
347 Dual fuel Droop Temp
  • 2 - 5 deg
350 Compressor Lockout
  • 15, 20 ,25, 30, 35, 40 or 45
360 Aux Heat Lockout
  • 40, 45, 50, 55 or 60
365 Discharge Temp Sensor
  • 0=None
  • 1=Remote
  • E=Auto Discover
366 Zoning High Limit
  • 0=Disabled
  • 110 - 170 deg.
367 Zoning Low Limit
  • 0=Disabled
  • 35 - 50 deg.
368 Zone Stage Hi Limit
  • 0=Disabled
  • 80 - 130 deg.
369 Zone Stage Lo Limit
  • 0=Disabled
  • 50 - 60 deg.
370 Humidity Sensor
  • 0=Disabled
  • 1=Internal
  • 2=Remote
  • E=Auto Discover
372 Humidification
  • 0=Off
  • 1=Humidify (no frost control)
  • 3=Humidify (frost control)
  • 8=Desert Humidity (no frost control)
  • 9=Desert Humidity (frost control)
  • E=Auto Discover
374 Humidify Fan Action
  • 0=Humidify w/ Fan or Heat
  • 1=Humidify Forces Fan On
  • 2=Humidify Only w/ Heat
  • 3=Independent Humidifier
379 Dehumidify Control
  • 0=None
  • 1=Dehumidify w/ A/C
  • 3=Independent Dehumidifier
382 Dehumidify Modes
  • 0=Dehum in Cool or Auto
  • 2=Dehum in All Modes
  • 3=Dehum in Cool, Off or Auto
383 Dehum Over-Cool Limit
  • 1-3 Deg.
384 Dehumidify Fan Action
  • 0=Energizes Fan
  • 1=No Action
386 Dehumidify Lockout
  • 0=Disabled
  • 1-Enabled
390 Dehumidify Away Mode
  • 0=Disabled
  • 1=Enabled
391 Away Mode Fan Action
  • 0=Auto
  • 1=On
  • 2=Circulate
392 Away Mode Low Limit
  • 70-80 deg.
393 Away Mode Temp
  • 70-99 deg.
394 Away Mode Humidity
  • 40-70%
400 Ventilation Control
  • 0=None
  • 1=On at All Times
  • 2=On Except Sleep
  • 3=#1 w/ Lockouts
  • 4=#2 w/ Lockouts
401 # of Bedrooms
  • 1-6
402 House Sq. Ft.
  • 10-50 (X 100)
403 Ventilation CFM
  • 30-195
404 Max Vent Percentage
  • 30-60
  • 100=Unlimited
405 Ventilation Fan
  • 0=On
  • 2=No Fan
406 Ventilation in Humidity
  • 0=Off
  • 1=On
430 Ventilation Lockout
  • 0=Disabled
  • 1=Lockout High Temp
  • 2=Lockout Low Temp
  • 3=Lockout High & Low
431 Vent Hi Temp Lockout
  • 90-110 deg.
432 Vent Low Temp Lockout
  • 0 to -20 deg.
450 DATS Inhibit
  • 0-65 deg.
500 Filter Reminder
  • 0=Off
  • 1=10 Days
  • 2=30 Days
  • 3=60 Days
  • 4=90 Days
  • 5=120 Days
  • 6=365 Days
502 Filter Runtime
  • 0=Counts Heat & Cool
  • 1=Counts Cool Only
510

Humidifier Reminder
  • 0=Off
  • 1=90 Days
  • 2=180 Days
  • 3=365 Days
520

UV Reminder
  • 0=Off, 1=365 Days
530 Intelligent Recovery
  • 0=Off, 1=On
540

Programmable Periods
  • 2 or 4
550 # of Weekend Periods
  • 2 or 4
560 # of Weekday Periods
  • 2 or 4
580 Compressor Delay
  • 0, 2, 3, 4 or 5
600 Highest Heat Temp
  • 40 to 89     82
610 Lowest Cool Temp
  • 51 to 99     65
640 Clock Format
  • 12=12 Hour, 24=24 Hour
650 Extend Fan Time (Heat)
  • 0 or 90
660

Extend Fan Time (Cool)
  • 0 or 90
670 Keypad Lockout
  • 0=Unlocked
  • 1=Partial Lock
  • 2=Full Lock
680 Temperature Control (Heat)
  • 1=Less aggressive
  • 2=Standard
  • 3=More aggresive
690 Temperature Control (Cool)
  • 1=Less aggressive
  • 2=Standard
  • 3=More aggresive
700 Temperature Display Offset
  • -3, -2, -1, 0, 1, 2 , 3
701 Humidity Display Offset
  • -12 to 12%
710 Thermostat Reset
  • 0=No reset
  • 1=Reset all options

Article ID: 353
Last updated: 6 Feb, 2023
Revision: 4
Thermostats -> Honeywell -> YTH9421 VisionPro IAQ -> VisionPro IAQ Setup Guide
https://ghac.makekb.com/entry/353/