Braeburn 1020NC & 1220NC Non-Programmable Thermostats
Detailed Installer Guide
This guide provides detailed instructions for installing the Braeburn 1020NC (Single Stage Heat / Cool Conventional and Heat Pump) and 1220NC (Up to 2 Heat / 1 Cool Conventional and Heat Pump) thermostats. The model number is located on the back of the thermostat.
Warning: Turn off power to the heating or cooling equipment before installation.
Attention: For installation by experienced service technicians only.
Read all instructions before proceeding.
This thermostat requires 24 Volt AC Power or two (2) properly installed "AA" Alkaline batteries for proper operation. When connecting 24 Volt AC Power, the batteries may be installed as a backup. For use only as described in this manual. Any other use will void the warranty.
1 Specifications
This thermostat is compatible with:
- Single stage heat / cool conventional and heat pump systems
- Conventional systems up to 2 heat / 1 cool (1220NC only)
- Single compressor heat pump systems with an auxiliary heat stage (1220NC only)
- 250 - 750 millivolt heat only systems
Electrical and control specifications:
- Electrical Rating: 24 Volt AC
- 1 amp maximum load per terminal
- AC Power: 18 - 30 Volts AC
- DC Power: 3.0 Volt DC (2 "AA" Alkaline Batteries Included)
- Control Range: 45°F - 90°F (7°C - 32°C)
- Temperature Accuracy: +/- 1°F (+/- 0.5°C)
Terminations:
- 1020NC: Rc, Rh, O, B, Y1, W1, G, C
- 1220NC: Rc, Rh, O, B, Y1, E/W1, G, W2, C
2 About Your Thermostat
The thermostat display and controls include:
- 1 Room Temperature: Displays the current room temperature.
- 2 Reset Button: Resets thermostat back to factory defaults.
- 3 Low Battery Indicator: Indicates when the batteries need to be replaced.
- 4 System Switch: Selects System Preference (COOL, OFF, HEAT, EMER [1220NC only]).
- 5 Quick Reference Instructions: Stored in slot at top of thermostat.
- 6 Fan Indicator: Indicates when the system fan is running.
- 7 System Status Indicator: Displays information about the status of the system (HEAT ON, COOL ON, AUX [1220NC only], EMER [1220NC only]).
- 8 Arrow Buttons: Used to increase or decrease settings.
- 9 Set Temperature: Displays the current set point temperature.
- 10 Fan Switch: Selects the system fan mode (AUTO, ON).
- Battery Compartment: Located in the back of the thermostat.
3 Installation
Warning: Disconnect power before beginning installation.
Thermostat Location
Install the thermostat approximately 5 feet (1.5 m) above the floor in an area with good air circulation and an average room temperature. Avoid installation in locations affected by drafts, dead air spots, hot or cold air ducts, direct sunlight, appliances, concealed pipes, chimneys, and outside walls.
Install your new Braeburn thermostat in 5 basic steps:
- Install the Sub-Base
- Provide Power
- Connect Your Wires
- Set Installer Switches
- Attach Thermostat to Sub-Base
1 Install the Sub-Base
- Remove the sub-base from the body of the thermostat.
- Mount the sub-base using the supplied anchors for drywall or plaster. Drill 3/16" pilot holes in your desired location.
NOTE: After sub-base installation, you may insert the quick reference card into the slot on the top of the base.
2 Provide Power
- For 24 Volt AC power, connect the common side of the transformer to the 'C' terminal on the thermostat sub-base.
- For primary or back-up power, insert the 2 supplied "AA" type alkaline batteries into the battery compartment located in the rear housing of the thermostat. Ensure correct polarity (+/-) for the batteries.
3 Connect Your Wires
Wiring Terminations
| Terminal | Function | Description |
|---|---|---|
| Rc | Input | 24 Volt AC Cooling Transformer (Dual Transformer Systems Only) |
| Rh | Input | Power Connection (24 Volt AC Heating Transformer or Millivolt Power Source) |
| O | Output | Reversing Valve (Cool Active) |
| B | Output | Reversing Valve (Heat Active) |
| Y1 | Output | 1st Stage Compressor |
| G | Output | Fan Control |
| W1 | Output | 1st Stage Conventional Heat |
| C | Input | 24 Volt AC Transformer Common |
Additional Terminations (1220NC only)
| Terminal | Function | Description |
|---|---|---|
| W1/E | Output | (W1) 1st Stage Conventional Heat / (E) Emergency Heat Relay |
| W2 | Output | 2nd Stage Heat / Auxiliary Heat |
Conventional Systems - Typical Wiring Configurations
NOTE: The "Installer Switch" option will be configured in the next step.
Heat Only or Millivolt
Set Installer Switch to CONV
| Rh | Power Connection |
| W | Heat Relay (appears as W1/E on 1220NC) |
| G | Fan Relay [note 4] |
| C | 24 Volt AC Transformer Common [note 1] |
1 HEAT / 1 COOL Single or Dual Transformer
Set Installer Switch to CONV
| Rh | 24 Volt AC Power (heating transformer) [note 2] |
| Rc | 24 Volt AC Power (cooling transformer) [note 2] |
| W1 | Heat Relay (appears as W1/E on 1220NC) |
| Y1 | Compressor Relay |
| G | Fan Relay |
| C | 24 Volt AC Transformer Common [note 1, 3] |
2 HEAT / 1 COOL Single or Dual Transformer (1220NC Only)
Set System Type to CONV
| Rh | 24 Volt AC Power (heating transformer) [note 2] |
| Rc | 24 Volt AC Power (cooling transformer) [note 2] |
| W1 | Heat Relay Stage 1 |
| W2 | Heat Relay Stage 2 |
| Y1 | Compressor Relay Stage 1 |
| G | Fan Relay |
| C | 24 Volt AC Transformer Common [note 1, 3] |
NOTES - Conventional Systems
- [1] If batteries are installed, the 24 Volt AC common connection is optional.
- [2] Remove factory-installed jumper for dual transformer systems.
- [3] In dual transformer systems, transformer common must come from the cooling transformer.
- [4] If needed for system.
Provide disconnect and overload protection as required.
Heat Pump Systems - Typical Wiring Configurations
NOTE: The "Installer Switch" option will be configured in the next step.
1 HEAT / 1 COOL - No Auxiliary Heat
Set Installer Switch to HP
| Rh | 24 Volt AC Power |
| Rc | Connected to Rh with supplied Jumper Wire |
| O or B | Changeover Valve [note 2] |
| Y1 | Compressor Relay |
| G | Fan Relay |
| C | 24 Volt AC Transformer Common [note 1] |
2 HEAT / 1 COOL - Including Auxiliary Heat (1220NC only)
Set Installer Switch to HP
| Rh | 24 Volt AC Power |
| Rc | Connected to Rh with supplied Jumper Wire |
| O or B | Changeover Valve [note 2] |
| Y1 | Compressor Relay (1st stage heating/cooling) |
| W2 | Auxiliary Heat Relay (2nd stage heating) [note 3] |
| E | Emergency Heat Relay [note 3] |
| G | Fan Relay |
| C | 24 Volt AC Transformer Common [note 1] |
NOTES - Heat Pump Systems
- [1] If batteries are installed, the 24 Volt AC common connection is optional.
- [2] Select 'O' for cool active or 'B' for heat active.
- [3] Install a field-supplied jumper between the W2 and 'E' terminals if there is no separate emergency heat relay installed.
Provide disconnect and overload protection as required.
4 Set Installer Switches
| Switch | Factory Default | Setting Options | Comments |
|---|---|---|---|
| CONV / HP | CONV | CONV | Select for conventional systems |
| HP | Select for heat pump systems | ||
| F / C | F | F | Select for Fahrenheit temperature scale |
| C | Select for Celsius temperature scale | ||
| HE / HG | HG | HG | Select for gas heat |
| HE | Select for electric heat |
NOTE: Press the reset button after making any changes to the installer switches.
5 Attach Thermostat to Sub-Base
- Line up the thermostat body with the sub-base.
- Carefully push the thermostat body against the sub-base until it snaps into place.
- Insert quick reference card into the slot on the top of the thermostat.
4 System Testing
Warning: Read Before Testing
- Do not short (or jumper) across terminals on the gas valve or at the heating or cooling system control board to test the thermostat installation. This could damage the thermostat and void the warranty.
- Do not select the COOL mode of operation if the outside temperature is below 50°F (10°C). This could possibly damage the controlled cooling system and may cause personal injury.
- This thermostat includes an automatic compressor protection feature to avoid potential damage to the compressor from short cycling. When testing the system, make sure to take this delay into account.
NOTE: The compressor delay can be bypassed by pressing the reset button on the front of the thermostat. All user settings will be returned to factory default.
- Move the SYSTEM switch to HEAT mode.
- Press the up arrow (?) to raise the set temperature a minimum of 3 degrees above the current room temperature. The system should start within a few seconds. With a gas heating system, the fan may not start right away.
- Move the SYSTEM switch to the OFF mode. Allow the heating system to fully shut down.
- Move the SYSTEM switch to the COOL mode.
- Press the down arrow (?) to lower the set temperature a minimum of 3 degrees below the current room temperature. The system should start within a few seconds (unless compressor short cycle protection is active - See note above).
- Move the SYSTEM switch to the OFF mode. Allow the cooling system to fully shut down.
- Move the FAN switch to the ON mode. The system fan should start within a few seconds.
- Move the FAN switch to the AUTO mode. Allow the system fan to turn off.
5 Setting User Options
Advanced User Options
User options allow customization of thermostat features. Most users will not need to make changes. To access the User Options menu, hold down both the up (?) and down (?) arrow buttons for approximately 3 seconds until the screen changes and displays the first User Option. Press the up (?) or down (?) button to change the setting for the displayed User Option. After making your setting, press both up (?) and down (?) buttons together to advance to the next User Option. The thermostat will return to normal mode after the last option or after 15 seconds of inactivity.
Table of User Options
| No. | User Options | Factory Default | Setting Options | Comments |
|---|---|---|---|---|
| 1 | 1st stage differential | 0.5 | 0.5, 1.0 or 2.0 | Select a 1st stage temperature differential of 0.5°, 1° or 2°F (0.2°, 0.5° or 1°C). |
| 2 | 2nd stage differential (1220NC Only) | 2.0 | 1.0, 2.0, 3.0, 4.0, 5.0 or 6.0 | Select a 2nd stage temperature differential of 1°, 2°, 3°, 4°, 5° or 6°F (0.5°, 1°, 1.5°, 2°, 2.5° or 3°C). |
Detailed Explanation of User Options:
Temperature Differential
(User Option 1 and 2) The differential setting is the temperature control range. A smaller setting provides tighter temperature control. The 2nd stage differential is for systems with a second stage of heating.
6 Operating Your Thermostat
Setting the System Control Mode
Use the SYSTEM switch to select the mode:
- COOL: Only your cooling system will operate.
- OFF: Heating and cooling systems are off.
- HEAT: Only your heating system will operate.
Additional Switch Position (Model 1220NC Only):
- EMER: Operates a backup heat source (Emergency Heat) for heat pump systems only.
NOTE: If your 1220NC was configured for a conventional system (CONV), the 'EMER' option will not be available, and "NO EMER SET" will flash if selected.
Setting the Fan Control Mode
Use the FAN switch to select the mode:
- AUTO: The system fan runs only when your heating or cooling system is running.
- ON: The system fan stays on continuously.
Temperature Adjustment
Press the up (?) or down (?) button to adjust the current set point temperature.
Status Indicators
Status indicators appear in the display:
- HEAT ON: Indicates your heating system is running.
- COOL ON: Indicates your cooling system is running.
Additional Status Indicators (Model 1220NC Only):
- AUX: Indicates the auxiliary stage of heating is running (Multi-Stage Systems only).
- EMER: Indicates the emergency heating system is running (Heat Pump Systems only).
Resetting the Thermostat
Use a small object (like a toothpick or paperclip) to gently press the reset button located inside the small hole on the front of the thermostat housing labeled "reset". This will erase all user settings.
7 Additional Operation Features
Compressor Protection
This thermostat includes an automatic compressor protection delay to prevent damage from short cycling. A short delay is activated after turning off the system compressor.
8 Thermostat Maintenance
Changing the Batteries
If batteries are installed and become low, a low battery indicator will appear in the display. Change batteries immediately:
- Remove the thermostat body by gently pulling it from the base.
- Remove old batteries and replace with new "AA" alkaline batteries.
- Ensure correct polarity (+/-).
- Gently push the thermostat body back onto the base.
We recommend replacing the thermostat batteries annually or if the thermostat will be unattended for an extended period.
Thermostat Cleaning
Never spray liquid directly on the thermostat. Use a soft, damp cloth to wipe the outer body. Do not use abrasive cleansers.
For troubleshooting tips, visit braeburnonline.com.
Store this manual for future reference.
Limited Warranty
When installed by a professional contractor, this product is backed by a 5-year limited warranty. Limitations apply. For full terms and conditions, visit www.braeburnonline.com/warranty, call 866.268.5599, or write to Braeburn Systems LLC, 2215 Cornell Avenue, Montgomery, IL 60538.
