Braeburn 1020NC / 1220NC Non-Programmable Detailed Thermostats Installer Guide
This guide provides detailed instructions for the installation and operation of 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.
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:
- Room Temperature: Displays the current room temperature.
- Reset Button: Resets thermostat back to factory defaults.
- Low Battery Indicator: Indicates when batteries need replacement.
- System Switch: Selects System Preference (COOL, OFF, HEAT, EMER for 1220NC).
- Quick Reference Instructions: Stored in a slot at the top of the thermostat.
- Fan Indicator: Indicates when the system fan is running.
- System Status Indicator: Displays information about the system's status (e.g., HEAT ON, COOL ON, AUX, EMER).
- Arrow Buttons: Used to increase or decrease settings.
- Set Temperature: Displays the current set point temperature.
- Fan Switch: Selects the system fan mode (AUTO, ON).
- Battery Compartment: Located on 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 locations affected by drafts, dead air spots, hot/cold air ducts, direct sunlight, appliances, concealed pipes, chimneys, and outside walls.
Installation Steps:
- Install the Sub-Base: Remove the sub-base from the thermostat body and mount it to the wall.
- Provide Power: Connect 24 Volt AC power to the 'C' terminal or insert two (2) "AA" alkaline batteries. Batteries can serve as backup power when AC power is connected.
- Connect Your Wires: Refer to the wiring diagrams for conventional and heat pump systems.
- Set Installer Switches: Configure switches for system type (CONV/HP), temperature scale (F/C), and heat type (HE/HG).
- Attach Thermostat to Sub-Base: Align and push the thermostat body onto the sub-base until it snaps into place.
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:
- Heat Only or Millivolt: Set Installer Switch to CONV. Rh: Power Connection; W: Heat Relay (W1/E on 1220NC); G: Fan Relay; C: 24 Volt AC Transformer Common.
- 1 Heat / 1 Cool Single or Dual Transformer: Set Installer Switch to CONV. Rh: 24 Volt AC Power (heating); Rc: 24 Volt AC Power (cooling); W1: Heat Relay (W1/E on 1220NC); Y1: Compressor Relay; G: Fan Relay; C: 24 Volt AC Transformer Common.
- 2 Heat / 1 Cool Single or Dual Transformer (1220NC Only): Set Installer Switch to CONV. Rh: 24 Volt AC Power (heating); Rc: 24 Volt AC Power (cooling); W1: Heat Relay Stage 1; W2: Heat Relay Stage 2; Y1: Compressor Relay Stage 1; G: Fan Relay; C: 24 Volt AC Transformer Common.
Notes - Conventional Systems: [1] 24 Volt AC common connection is optional if batteries are installed. [2] Remove factory jumper for dual transformer systems. [3] In dual transformer systems, 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:
- 1 Heat / 1 Cool - No Auxiliary Heat: Set Installer Switch to HP. Rh: 24 Volt AC Power; Rc: Connected to Rh with supplied jumper; O or B: Changeover Valve; Y1: Compressor Relay; G: Fan Relay; C: 24 Volt AC Transformer Common.
- 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; O or B: Changeover Valve; Y1: Compressor Relay (1st stage heating/cooling); W2: Auxiliary Heat Relay (2nd stage heating); E: Emergency Heat Relay; G: Fan Relay; C: 24 Volt AC Transformer Common.
Notes - Heat Pump Systems: [1] 24 Volt AC common connection is optional if batteries are installed. [2] Select O for cool active or B for heat active. [3] Install a field-supplied jumper between W2 and E terminals if no separate emergency heat relay is installed. Provide disconnect and overload protection as required.
4 System Testing
Warning: Read Before Testing.
- Do not short terminals on the gas valve or control board to test; this can damage the thermostat and void the warranty.
- Do not select COOL mode if the outside temperature is below 50°F (10°C) to avoid system damage and potential injury.
- The thermostat has automatic compressor protection against short cycling. Allow for this delay during testing. The delay can be bypassed by pressing the reset button, which also returns settings to factory defaults.
Testing Procedure:
- Set SYSTEM switch to HEAT. Press $\wedge$ to raise the set temperature at least 3°F above room temperature. The system should start within seconds.
- Set SYSTEM switch to OFF. Allow the heating system to shut down completely.
- Set SYSTEM switch to COOL. Press $\vee$ to lower the set temperature at least 3°F below room temperature. The system should start within seconds (unless compressor protection is active).
- Set SYSTEM switch to OFF. Allow the cooling system to shut down completely.
- Set FAN switch to ON. The system fan should start within seconds.
- Set FAN switch to AUTO. Allow the system fan to turn off.
5 Setting User Options
User options allow customization of thermostat features. To access the User Options menu, hold down both $\wedge$ and $\vee$ buttons for approximately 3 seconds.
Use the $\wedge$ or $\vee$ buttons to change settings and press both $\wedge$ and $\vee$ together to advance to the next option. The thermostat returns to normal mode after the last option or 15 seconds of inactivity.
| No. | User Options | Factory Default | Setting Options | Comments |
|---|---|---|---|---|
| 1 | 1st stage differential | 0.5 | 0.5, 1.0, or 2.0 | Selects 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 | Selects 2nd stage temperature differential of 1°, 2°, 3°, 4°, 5°, or 6°F (0.5°, 1°, 1.5°, 2°, 2.5°, or 3°C). |
Temperature Differential:
The differential setting is the temperature control range. A smaller setting provides tighter temperature control. The 2nd stage differential applies only to systems with a second stage of heating.
6 Operating Your Thermostat
Setting the System Control Mode:
- COOL: Only the cooling system operates.
- OFF: Heating and cooling systems are off.
- HEAT: Only the heating system operates.
- EMER (Model 1220NC Only): Operates a backup heat source for heat pump systems. If configured for a conventional system, "NO EMER SET" will flash if EMER is selected.
Setting the Fan Control Mode:
- AUTO: The system fan runs only when the heating or cooling system is running.
- ON: The system fan stays on continuously.
Temperature Adjustment:
Press the $\wedge$ or $\vee$ button to adjust the current set point temperature.
Status Indicators:
- HEAT ON: Indicates the heating system is running.
- COOL ON: Indicates the cooling system is running.
- AUX (Model 1220NC Only): Indicates the auxiliary stage of heating is running.
- EMER (Model 1220NC Only): Indicates the emergency heating system is running.
Resetting the Thermostat:
Use a small object (like a toothpick) to gently press the reset button located in the hole labeled "reset" on the front of the thermostat housing. 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 the system compressor turns off.
8 Thermostat Maintenance
Changing the Batteries:
If batteries are installed and become low, a low battery indicator will appear on the display. Replace batteries immediately:
- Gently pull the thermostat body from the base.
- Remove old batteries and insert new "AA" alkaline batteries, ensuring correct polarity (+/-).
- Gently push the thermostat body back onto the base.
Note: It is recommended to replace 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.
Limited Warranty
When installed by a professional contractor, this product is backed by a 5-year limited warranty. For terms and conditions, visit www.braeburnonline.com/warranty, call 866-268-5599, or write to Braeburn Systems LLC, 2215 Cornell Avenue, Montgomery, IL 60538.
