Honeywell FocusPRO™ TH6220D Programmable Thermostat Installation Guide
Product Application
This thermostat provides electronic control of 24 VAC single-stage and multi-stage heating and cooling systems, or 750 mV heating systems.
System Types (up to 2 heat/2 cool)
- Gas, oil, or electric heat with air conditioning
- Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity
- Heat only - two-wire systems, power to open and close zone valves (Series 20), and normally-open zone valves
- Heat only with fan
- Cool only
- 750 mV heating systems
Power Options
- Battery power only
- Common wire only
- Common wire with battery backup
Changeover Options
- Selectable manual or auto-changeover modes
System Settings
- Heat, Off, Cool, Auto, Em Heat
Fan Settings
- Auto, On
Installation Requirements
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 17).
- Always test for proper operation after installation (see page 13).
⚠️ 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.
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:
- FocusPRO™ TH6220D programmable thermostat (wallplate attached to back)
- Quick reference card
- Operating manual
- Wall anchors and mounting screws (2 each)
- AA alkaline batteries (2)
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
To remove the wallplate from the thermostat, insert a finger into the wire hole and pull.
After removing the wallplate, follow these directions for mounting:
- Insert the quick reference card into the slot in the back of the thermostat.
- Pull wires through the wire hole.
- Position the wallplate on the wall, ensuring it is level, and mark the hole positions with a pencil.
- Drill holes at the marked positions and tap in the supplied wall anchors. (Drill 3/16" holes for drywall; drill 7/32" holes for plaster.)
- Place the wallplate over the anchors, insert and tighten the mounting screws.
Wiring
⚠️ CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before wiring.
Follow these steps for wiring:
- Loosen screw terminals, insert wires into the terminal block, and re-tighten screws.
- Push excess wire back into the wall opening, keeping wires in the shaded area as shown in the diagram.
- Plug the wall opening with non-flammable insulation to prevent drafts from affecting thermostat operation.
Terminal Designations
Conventional Terminal Letters
- Y2: 2nd stage compressor contactor
- W2: 2nd stage heat relay
- G: Fan relay
- W: 1st stage heat relay
- C: Common wire from the secondary side of the cooling system transformer
- Y: 1st stage compressor contactor
- R: Heating power. Connect to the secondary side of the heating system transformer.
- Rc: Cooling power. Connect to the secondary side of the cooling system transformer.
Heat Pump Terminal Letters
- L: Heat pump reset. L terminal powered continuously when System is set to Em Heat.
- E: Emergency heat relay
- Aux: Auxiliary heat relay
- G: Fan relay
- O/B: Changeover valve for heat pumps
- C: Common wire from the secondary side of the cooling system transformer.
- Y: Compressor contactor
- R: Heating power. Connect to the secondary side of the heating system transformer.
- Rc: Cooling power. Connect to the secondary side of the cooling system transformer.
Notes on Wiring
- R & Rc terminals: In a single-transformer system, leave the metal jumper in place between R & Rc. Remove the metal jumper if it is a two-transformer system.
- C terminal: The C (common wire) terminal is optional when the thermostat is powered by batteries.
- W (O/B) terminal: If the thermostat is configured for a heat pump in the Installer Setup, configure the changeover valve for cool ("O" factory setting) or heat ("B").
- L terminal (Output): Heat pump reset. The L terminal is powered continuously when the thermostat is set to Em Heat. Configure the thermostat for 2 heat / 1 cool heat pump in the Installer Setup.
Wire Specifications
Use 18- to 22-gauge thermostat wire. Shielded cable is not required.
Wiring Diagrams
The document includes various wiring diagrams for different system types, illustrating connections between the thermostat terminals and HVAC equipment. These cover 1H/1C systems (1 and 2 transformers), 1H/1C heat pump systems, heat-only systems (with fan, Series 20, normally open zone valve), cool-only systems, and 2H/2C systems.
General Wiring Notes applicable to diagrams:
- Power supply: Provide disconnect means and overload protection as required.
- Factory-installed jumper: Remove for 2-transformer systems only.
- Optional 24VAC common connection.
- Installer Setup prompts for system type (e.g., Heat Only, 1Heat/1Cool Heat Pump, 2Heat/1Cool Heat Pump, 2Heat/2Cool conventional).
- L terminal is powered continuously when the thermostat is set to Em Heat.
- Install field jumper between Aux and E if there is no emergency heat relay.
Power Options & Mounting
AC Power
The thermostat can be powered by 24 VAC power or by batteries. To wire for AC power, connect the common side of the cooling transformer to the "C" terminal.
Important: Remove R/Rc jumper for 2-transformer systems only.
Battery Power
The thermostat can be powered by batteries alone or use batteries for backup power with AC. Batteries save time/day settings and power the display during power interruptions. Batteries can be changed without removing the thermostat from the wall.
To Mount Thermostat
Align the 4 tabs on the wallplate with the corresponding slots on the back of the thermostat. Push gently until the thermostat snaps into place.
Installer Setup
Follow the procedure below to configure the thermostat to match the installed heating/cooling system and customize feature operation.
To begin, press and hold the [Up Arrow] and [Fan] buttons until the display changes. Use the [Up Arrow] or [Down Arrow] buttons to change settings. Press [Next] to advance to the next function. Press [Done] to exit and save settings.
Setup Functions and Settings
| Setup Function | Settings & Options |
|---|---|
| 1 System type | 0: Gas, oil or electric heat with air conditioning 1: 1 heat/1 cool heat pump 2: Heat only (2-wire systems/power to open & close zone valves/normally open zone valves) 3: Heat only with fan 4: Cool only 5: 2 heat/1 cool heat pump 6: 2 heat/2 cool conventional 7: 2 heat/1 cool conventional 8: 1 heat/2 cool conventional |
| 2 Changeover valve (O/B terminal) | 0: Changeover valve (O/B terminal energized in cooling) 1: Changeover valve (O/B terminal energized in heating) |
| 3 Fan control (heating) | 0: Gas or oil furnace - equipment controls fan in heating 1: Electric furnace - thermostat controls fan in heating |
| 5 Heat cycle rate (CPH: cycles/hour) | 5: For gas or oil furnaces of less than 90% efficiency 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] |
| 6 Second stage heat cycle rate/ Auxiliary heat (CPH) | 5: For gas or oil furnaces of less than 90% efficiency 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] |
| 8 Emergency heat cycle rate (CPH) | 9: For electric emergency heat 1: For steam or gravity systems 3: For hot water systems & furnaces of over 90% efficiency 5: For gas or oil furnaces of less than 90% efficiency [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] |
| 10 Second stage compressor cycle rate (CPH) | 3: Recommended for most compressors [Other cycle rate options: 1, 2, 4, 5 or 6 CPH] |
| 12 System setting adjustment | 0: Manual changeover (Heat/Cool/Off) 1: Auto changeover (Heat/Cool/Auto/Off) [See page 14] 2: Auto changeover only (Auto) [See page 14] |
| 13 Adaptive Intelligent Recovery™ | 1: On [See page 14] 0: Off |
| 14 Temperature display | 0: Fahrenheit 1: Celsius |
| 15 Compressor protection | 5: Five-minute compressor off time [See page 14] [Other options: 0, 1, 2, 3 or 4-minute off time] |
| 16 Schedule format | 0: 5/2 (programmable weekdays and weekends) 1: 5/1/1 (weekdays, Saturday & Sunday programmable) |
| 27 Heat temperature range stops | 90: Highest heating temperature setting 40-89: Heating temperature range (increments of 1°F, or 0.5°C) |
| 28 Cool temperature range stops | 50: Lowest cooling temperature setting 51-99: Cooling temperature range (increments of 1°F, or 0.5°C) |
Installer System Test
Follow the procedure below to test the heating, cooling, and fan.
To begin, press and hold the [Up Arrow] and [Down Arrow] buttons until the display changes. Use the [Up Arrow] or [Down Arrow] buttons to turn the system on or off. Press [Next] to advance to the next test. Press [Done] to terminate the system test.
System Test Number and Status
| System Test | System Status |
|---|---|
| 10 Heating system | 0: Heat and fan turn off 1: Heat turns on. Fan also turns on immediately if Function 1 is set to "1" or "5," or if Function 3 is set to "1" [See page 11] 2: Second stage heat turns on |
| 20 Emergency heating system | 0: Heat and fan turn off 1: Heat and fan turn on 2: Second stage heat turns on (Aux) |
| 30 Cooling system | 0: Compressor and fan turn off 1: Compressor and fan turn on 2: Second stage compressor turns on |
| 40 Fan system | 0: Fan turns off 1: Fan turns on |
| 70 Thermostat information (for reference only) | 71: Software revision number (major revisions) 72: Software revision number (minor revisions) 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.
Explanation of Features
Auto Changeover (Setup Function 12)
Auto Changeover is a feature used in climates where both air conditioning and heating are used on the same day. When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature.
Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation (called "deadband"). The 3-degree separation between heating and cooling set temperatures is fixed and cannot be changed.
Adaptive Intelligent Recovery™ (Setup Function 13)
Adaptive Intelligent Recovery eliminates guesswork when setting your schedule. It allows the thermostat to “learn” how long your furnace and air conditioner take to reach the desired temperature. Set your program schedule to the time you want the house to reach the desired temperature. The thermostat then turns on the heating or cooling at just the right time to reach your scheduled temperature at your scheduled time. For example: Set the Wake time to 6 am, and the temperature to 70°. The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6.
Built-in Compressor Protection (Setup Function 15)
This feature helps prevent damage to the compressor in your 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" (heat pumps only) will flash on the display. When the safe wait time has elapsed, the message stops flashing, and the compressor turns on.
Quick Reference to Controls
Digital Display Screen
The digital display screen shows current inside temperature, current time/day, system status (e.g., Heat On, Cool On), temperature setting, auxiliary heat status, and fan setting.
Controls
- Temperature buttons: Press to adjust temperature settings.
- Hold button: Press to override programmed temperature control.
- Function buttons: Press to select the function displayed just above each button. Functions change depending on the task.
Battery Replacement
To replace batteries, press and pull to remove the battery compartment. Insert fresh AA alkaline batteries, then reinstall the battery holder.
In Case of Difficulty
If you have difficulty with your thermostat, try the suggestions below. Most problems can be corrected quickly and easily.
Display is Blank
- Check circuit breaker and reset if necessary.
- Make sure the power switch at the heating & cooling system is on.
- Make sure the furnace door is closed securely.
- If the thermostat is battery-powered, ensure fresh AA alkaline batteries are correctly installed.
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).
- Check temperature range stop settings (Function 27 & 28).
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.
- Check for 24 Vac between the heat terminal (W) and the transformer common. If 24 Vac is present, the thermostat is functional; otherwise, check the heating equipment.
- Check for loose or broken wires between the thermostat and the heating equipment.
Cooling System Does Not Respond ("Cool 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 cooling equipment.
- Check for 24 Vac between the cooling terminal (Y) and the transformer common. If 24 Vac is present, the thermostat is functional; otherwise, check the cooling system.
- Check for loose or broken wires between the thermostat and the cooling equipment.
Fan Does Not Turn On in a Call for Heat
- Check Installer Setup, Function 3 (Fan Control), to ensure the fan control is properly set for the system type.
Heat Pump Issues Cool Air in Heat Mode, or Warm Air in Cool Mode
- Check Installer Setup, Function 2 (Changeover Valve), to ensure it is properly configured for your system.
Heat/Cool Both On at Same Time, or Heat Does Not Turn Off
- Check Installer Setup, Function 1 (System Type), to ensure it is set to match the installed heating/cooling equipment.
- Check that heating and cooling wires are not shorted together.
Heating Equipment Running in Cool Mode
- Check Installer Setup, Function 1 (System Type), to ensure it is set to match the installed heating/cooling equipment.
Cannot Change System Setting to "Heat"
- Check Installer Setup, Function 1 (System Type), to ensure it is set to match the installed heating equipment.
- Change Installer Setup, Function 12 (System Setting) to Manual or Auto Changeover.
Cannot Change System Setting to "Cool"
- Check Installer Setup, Function 1 (System Type), to ensure it is set to match the installed cooling equipment.
- Change Installer Setup, Function 12 (System Setting) to Manual or Auto Changeover.
"Heat On" is Not Displayed
Change the System Setting to Heat, and set the temperature level above the current room temperature.
"Cool On" is Not Displayed
Change the System Setting to Cool, and set the temperature level below the current room temperature.
"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.
Accessories & Replacement Parts
Please contact your distributor to order replacement parts.
- Battery holder: Part Number 50007072-001
- Cover plate assembly (Use to cover marks left by old thermostats): Part Number 50002883-001
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
- 3-9/16" H x 5-13/16" W x 1-1/2" D
- 91 mm H x 147 mm W x 38 mm D
Electrical Ratings
| Terminal | Voltage (50/60Hz) | Running Current |
|---|---|---|
| W (O/B) Heating | 20-30 Vac | 0.02-1.0 A |
| (Powerpile) | 750 mV DC | 100 mA DC |
| W2 (Aux) Heating | 20-30 Vac | 0.02-0.5 A |
| Y Cooling | 20-30 Vac | 0.02-1.0 A |
| Y2 Cooling | 20-30 Vac | 0.02-1.0 A |
| G Fan | 20-30 Vac | 0.02-0.5 A |
| E Emergency heat | 20-30 Vac | 0.02-1.0 A |
| L Heat pump reset | 20-30 Vac | 0.02-0.5 A |
Company Information
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V 4Z9
U.S. Registered Trademark. Patents pending. Copyright © 2005 Honeywell International Inc. All rights reserved. Printed in U.S. Document number 69-1785. Date 01-2005.
Visit: www.honeywell.com/yourhome
