Honeywell TH9421 Support Question
Honeywell TH9421 Support Question
Find answers below for this question about Honeywell TH9421.Need a Honeywell TH9421 manual? We have 1 online manual for this item!
Question posted by rjh04 on October 22nd, 2013
I Have This Thermostat That Was Installed New August 2008. It Controls Air Sou
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Related Honeywell TH9421 Manual Pages
Owner's Manual - Page 2
...pending.
Registered Trademark. Copyright © 2009 Honeywell International Inc. All rights reserved. This thermostat contains a Lithium battery which may apply, See www.dtsc.ca.gov/hazardouswaste/perchlorate. BE...Need Help? Never use sharp instruments, such as a pencil or pen, to the thermostat, always press keys with this product please visit http://yourhome.honeywell.com or call Honeywell...
Owner's Manual - Page 3
... 12 Special features 13 Screen lock 14 Screen cleaning 15 Optional remote sensors 16 Humidity control 17 Ventilation control 19
Appendices Advanced functions 20 In case of difficulty 27 Limited warranty 29
This thermostat is ready to go ! Your new thermostat is below 50˚F (10˚C).
1
69-1815EFS-06 CAUTION: EQUIPMENT DAMAGE HAZARD. See...
Owner's Manual - Page 4
... your new thermostat
Your new thermostat is pre-programmed and ready to Auto See page 6 3. Select fan setting: Preset to go to Heat See page 7 4. Set clock...See page 5 2. Select system setting: Preset to bed at any time, and manually adjust the temperature (see pages 10-11).
69-1815EFS-06
2 Set humification, dehumidification & ventilation controls...
Owner's Manual - Page 5
Quick reference to controls
Press day(s) to set program schedule (see page 9)
Press to select fan operation (see page 6)
Press to select system type (see page 7)
Press to set ...
Owner's Manual - Page 6
... activated • Aux Heat On: Auxiliary heating system is activated • Wait: Compressor protection activated (see page 13)
Inside humidity (If an outdoor sensor is installed, the outdoor temperature is shown instead of the humidity level. Press MORE to unlock
69-1815EFS-06
4
Temperature setting
Program schedule on (does not display...
Owner's Manual - Page 9
... SYSTEM
VisionPRO® IAQ
Press the SYSTEM button to select, then press DONE:
• Heat: Thermostat controls only the heating system.
• Cool: Thermostat controls only the cooling system.
• Off: Heating and cooling systems are off. • Auto: Thermostat automatically selects
heating or cooling depending on the indoor temperature. • Em Heat (only for...
Owner's Manual - Page 10
You can reduce your system for maximum energy savings. This thermostat is pre-set to adjust times and temperatures of each day. We recommend these settings, since they can program four time periods each day, with ...
Owner's Manual - Page 12
... time you 've programmed for the current time period.
This will resume. Press CANCEL (or SCHED) to resume program schedule
69-1815EFS-06
10 The new temperature will resume and set the temperature to the level you set timer
Press s or t to immediately adjust the temperature. The program schedule will temporarily...
Owner's Manual - Page 15
... humid season. This will control temperature and humidity to help protect your house is reached at the time you set to activate this feature does not work, contact your installer.)
13
69-1815EFS-06
Adaptive Intelligent Recovery: This feature allows the thermostat to "learn" how long the furnace and air conditioner take to replace...
Owner's Manual - Page 17
... 30 seconds, press DONE to resume normal operation, or press SCREEN again if you can clean the screen without changing any liquid directly on the thermostat. Note: Do not spray any settings. SCHED HOLD CLOCK SCREEN MORE
15
69-1815EFS-06 The screen will remain locked for 30 seconds so you...
Owner's Manual - Page 18
... HOLD CLOCK SCREEN MORE
Inside temperature
Outside temperature
If an outdoor sensor is installed, the current outdoor temperature is installed, the display shows the indoor temperature at the location of temperature readings from all sensors or an average between the thermostat and the sensor(s).
69-1815EFS-06
16
If more than one indoor...
Owner's Manual - Page 19
... level again. Note: If you do not have an outdoor temperature sensor, the Frost Control level will control humidity to the maximum level without frosting or fogging windows and without saving changes. Once frost no longer appears, the thermostat will not be displayed.
17
69-1815EFS-06
When using Frost Protection, if frost...
Owner's Manual - Page 20
...control
Press to select Auto or Off
Press to set desired humidity
73 Inside
AUTO
DEHUMIDIFIER
55
DONE
Press to save and exit, or press CANCEL to set the desired humidity level and operation (Auto or Off). If installed...have a dehumidifier, the thermostat activates the air conditioner to reduce humidity (may cool as much as needed to control a dehumidifier, the thermostat can activate it as...
Owner's Manual - Page 21
Ventilation control
Press to set ventilation timer
AUTO
DONE
40 VENT
Minutes
CANCEL
Press to save and exit, or press CANCEL to exit without saving changes. If programmed for auto-ventilation by using the timer when set the ventilation timer. Ventilation can still be requested by the installer, the thermostat will turn off /on...
Owner's Manual - Page 24
Thermostat is non-programmable. 4 Program schedule is lighted:
0 Light on for approx. 45 seconds after keypress 1 Light always on low intensity, full bright after keypress
69-...
Owner's Manual - Page 25
...1 On: Auto-change to daylight savings time (through 2006, and for areas that do
not use the new 2007 DST calendar) 2 On: Auto-change to daylight savings time. Advanced functions
VisionPRO® IAQ
Temperature format... 1 Celsius
Daylight savings time on/off
Function 0330
The thermostat is pre-programmed to automatically adjust to daylight savings time (2007 and beyond, for areas that use...
Owner's Manual - Page 28
...:30")
Screen lock
Function 0670
Press s/t to choose a screen lock setting (see page 14):
Options: 0 Screen is unlocked (fully functional) 1 All functions locked except temperature controls and CANCEL key 2 Screen is fully locked
69-1815EFS-06
26
Owner's Manual - Page 29
...; to 90°F (4.5° to 32°C) • Cool: 50° to 99°F (10° to make sure the thermostat is normal. "Err" appears on screen
• Contact your thermostat, please try the following suggestions. Your equipment may need service or repair.
27
69-1815EFS-06
Most problems can be corrected...
Owner's Manual - Page 30
....
• Check circuit breaker and reset if necessary.
• Make sure power switch at the same time
• This is normal operation. Auto indicates the thermostat is on. Wait 5 minutes for "On" during this period (see page 13). Make sure the temperature is scheduled for the system to restart safely, without...
Owner's Manual - Page 32
H25192; Automation and Control Systems
Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9
http://...
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