Honeywell Home TH4110B Programmable Thermostat
Product Application
This thermostat provides electronic control of 24 VAC single-stage heating and cooling systems, or 750 mV heating systems.
System Types
- Gas, oil, or electric heat with air conditioning
- Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity
- Heat only
- Heat only with fan
- Cool only
- 750 mV heating systems
Power Type
- AA alkaline batteries (2)
System Settings
- Heat, Off, Cool
Fan Settings
- Auto, On
Must be installed by a trained, experienced technician
- Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.
- Check the ratings in this booklet to verify that this product is suitable for your application (see page 12).
- Always test for proper operation after installation (see pages 8-9).
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.
® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
Installation tips
Install the thermostat about 5 feet (1.5m) above the floor in an area with good air circulation at average temperature.
Do not install in locations where the thermostat can be affected by:
- Drafts or dead spots behind doors and in corners
- Hot or cold air from ducts
- Sunlight or radiant heat from appliances
- Concealed pipes or chimneys
- Unheated/uncooled areas such as an outside wall behind the thermostat
Pre-installation checklist
Package contents
Check to make sure your package includes the following items:
Required tools & supplies
- No. 2 Phillips screwdriver
- Small pocket screwdriver
- Drill
- Drill bit (3/16” for drywall, 7/32” for plaster)
- Hammer
- Pencil
- Electrical tape
- Level (optional)
Wallplate installation
Grasp top and bottom of wallplate and pull to remove it from the thermostat
Remove the wallplate from the thermostat as shown on left, then follow the directions below for mounting.
- Pull wires through the wire hole.
- position the wallplate on the wall, level, and mark hole positions with pencil.
- Drill holes at marked positions as shown below, then tap in supplied wall anchors.
- Place wallplate over anchors, and insert and tighten mounting screws.
- Insert quick reference card in slot in front of wall plate.
Wiring
NOTES
R & Rc terminals
In a single-transformer system, leave metal jumper in place between R & Rc. Remove metal jumper if a two-transformer system.
Heat pump systems
If wiring to a heat pump, use a small piece of wire (not supplied) to connect terminals W and Y.
Wire specifications
Use 18- to 22-gauge thermostat wire.
A shielded cable is not required.
Wiring
- Loosen screw terminals, insert wires into terminal block, then re-tighten screws.
- push excess wire back into the wall opening.Keep wires in shaded area as shown at left.
- Plug the wall opening with nonflammable insulation to prevent drafts from affecting thermostat operation.
Terminal Designations
- W Heat relay.
- Y Compressor contactor.
- G Fan relay.
- O Heat pump changeover valve energized in cooling.
- Rc Cooling power. Connect to secondary side of cooling system transformer.
- R Heating power. Connect to secondary side of heating system transformer.
- B Heat pump changeover valve energized in heating.
Wiring diagrams
- Power supply. Provide disconnect means and overload protection as required.
- Factory-installed jumper. Remove for 2-transformer systems only.
- Use either O or B terminals for changeover valve.
- Use a small piece of wire (not supplied) to connect W and Y terminals.
- Set fan operation switch to Heat Pump (see page 6) and configure for heat pump (see pg. 8).
Fan operation settings
- Gas or Oil: For gas or oil heating systems, leave the fan operation switch in this factory-set position (This setting is for systems that control the fan in a call for heat.)
- Electric or Heat Pump: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire is connected to the G terminal.)
Battery installation
Install two AA alkaline batteries in the back of the thermostat, as shown at left. Fresh batteries should be installed immediately when the REPLACE BATT warning begins flashing (see page 10.) The warning flashes about two months before batteries are depleted. Even if the warning does not appear, Batteries should be replaced once a year, or before the home is left vacant for more than a month.
Thermostat mounting
Align the 4 tabs on the wallplate with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps in place.
Installer setup
Follow the procedure below to configure the thermostat to match the installed heating/cooling system, and customize feature operation as desired.
Setup Function Settings & Options
| 1 | System type | 0 | Gas, oil or electric heat with air conditioning |
| 1 | Heat pump (5-minute compressor off time in heating and cooling) | ||
| 5 | Heating cycle rate | 5 | For gas or oil furnaces of less than 90% efficiency |
| (CPH: cycles/hour) | 1 | For steam or gravity systems | |
| 3 | For hot water systems & furnaces of over 90% efficiency | ||
| 9 | For electric furnaces
[Other cycle rate options: 2, 4, 6, 7, 8, 10, 11 or 12 CPH] |
||
| 9 | Compressor cycle rate (CPH) | 3 | Recommended for most compressors
[Other cycle rate options: 1, 2, 4, 5 or 6 CPH] |
| 14 | Temperature | 0 | Fahrenheit |
| display | 1 | Celsius | |
| 15 | Compressor protection | 5 | Five-minute compressor off time **See page 10 [Other options: 0, 1, 2, 3 or 4-minute off time] |
Installer system test
After completing the installer setup above, press the 
button again to begin a system test (see next page).
Follow the procedure below to test the heating and cooling system.
- Set the SYSTEM switch to Cool.
- Press
to turn on the cooling system, then check the system status (see table, below). - Pressto turns off the cooling system.
- Set the SYSTEM switch to Heat.
- Press to turn on the heating system, then check the system status (see table, below).
- Pressto turn off the heating system.
- [Optional] Set the SYSTEM switch to Off to display thermostat information (see table, below).
Pressto display 71-76. - Press and hold
to terminate the system test at any time.
System Test System Status
| 10 | Heating system | 0 | Heat and fan turn off. |
| 1 | The heat turns on. Fan also turns on immediately if Fan Operation Switch is set to Electric Heat/Heat Pump (see page 6). | ||
| 30 | Cooling system | 0 | The compressor and fan turn off. |
| 1 | The compressor and fan turn on. | ||
| 70 | Thermostat | 71 | Software revision number (major revisions) |
| information | 72 | Software revision number (minor revisions) | |
| (for reference only) | 73 | Configuration identification code (major) | |
| 74 | Configuration identification code (minor) | ||
| 75 | Production configuration date code (week) | ||
| 76 | Production configuration date code (year) |
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection (minimum off time) is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
A quick reference to controls
- Set: Press to set time/day/ schedule
- Hold: Press to override programmed temperature control
- Run: Press to resume program schedule
System switch
- Cool: The thermostat controls only the cooling system.
- Heat: The thermostat controls only the heating system.
- Off: Heating and cooling systems are off.
A quick reference to display screen
Built-in compressor protection (Setup Function 15)
This feature helps prevent damage to the compressor in the air conditioning or heat pump system. Damage can occur if the compressor is restarted too soon after shutdown.This feature forces the compressor to wait for a few minutes before restarting. During the wait time, the message Cool On (or Heat On if you have a heat pump) will flash on the display.When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most problems can be corrected quickly and easily.
- Display is blank
Make sure fresh AA alkaline batteries are correctly installed (see page 7). - Temperature settings do not change
Make sure heating and cooling temperatures are set to acceptable ranges:- Heat: 40° to 90°F (4.5° to 32°C).
- Cool: 50° to 99°F (10° to 37°C).
- The heating system does not respond (“Heat On” appears on screen)
- Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the heating equipment to find the cause of the problem.
- Check for 24 Vac between the heat terminal (W) and the transformer common. If 24 Vac is present, the thermostat is functional. Check the heating equipment to find the cause of the problem.
- Check for loose or broken wires between the thermostat and the heating equipment.
- The cooling system does not respond (“Cool On” appears on the screen)
- Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem
- Check for 24 Vac between the cooling terminal (Y) and the transformer common. If 24 Vac is present, the thermostat is functional. Check the cooling system to find the cause of the problem.
- Check for loose or broken wires between the thermostat and the cooling equipment.
- Fan does not turn on in a call for heat
Make sure the Fan Operation switch is set to the proper system (see page 6) - “Cool On” or “Heat On” is flashing
Compressor protection timeout is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor. - “Heat On” is not displayed
Set the System switch to Heat, and set the temperature level above the current room temperature (see page 10). - “Cool On” is not displayed
Set the System switch to Cool, and set the temperature level below the current room temperature (see page 10).
Accessories
Please contact your distributor to order accessories.
Cover plate assembly ……………………………………..Part Number 50002883-001
(Used to cover marks left by old thermostats.)
Specifications
Temperature Ranges
- Heat: 40° to 90°F (4.5° to 32°C)
- Cool: 50° to 99°F (10° to 37°C)
Operating Ambient Temperature
32° to 120°F (0° to 48.9°C)
Shipping Temperature
-20° to 120°F (-28.9° to 48.9°C)
Operating Relative Humidity
5% to 90% (non-condensing)
Physical Dimensions
- 3-13/16” H x 5-3/8” W x 1-1/4” D
- 97 mm H x 137 mm W x 32 mm D
Electrical Ratings
- System Voltage (50/60Hz) Running Current
- Heating 20-30 Vac 0.02-1.0 A
- (Powerpile) 750 mV DC 100 mA DC
- Cooling 20-30 Vac 0.02-1.0 A
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North Golden Valley, MN 55422
www.honeywell.com/yourhome
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive Scarborough, Ontario M1V 4Z9
Printed in the U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.
® U.S. Registered Trademark.
© 2005 Honeywell International Inc.
Patents pending. All rights reserved.
69-1769 02-2005
REFERENCE:
Download Manual:
Honeywell Home TH4110B Programmable Thermostat Installation Guide
Honeywell Home TH4110B Programmable Thermostat Installation Guide
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