Braeburn 1220 Thermostat Operation Manual

The Braeburn 1220 is a non-programmable thermostat designed for single-stage heat/cool conventional and heat pump systems, including up to 2 heat/1 cool conventional systems, single compressor heat pump systems with auxiliary heat, and 250–750 millivolt heat-only systems. It features a large display, easy operation, and precise temperature control, ideal for residential applications. Below are the key specifications and operation instructions.

1. Key Specifications 2. Operation Instructions 2.1. Initial Setup 2.2. Operating the Thermostat 2.3. Temperature Display Adjustment 2.4. Troubleshooting 3. Installation Instructions 3.1. Remove Old Thermostat 3.2. Installing New Thermostat 3.3. Battery Location 3.4. Power Options

Key Specifications

Type: Non-programmable thermostat
Compatibility:
- Single-stage heat/cool conventional and heat pump systems
- Conventional systems up to 2 heat/1 cool
- Single compressor heat pump systems with auxiliary heat stage
- 250–750 millivolt heat-only systems
- Not compatible with multi-stage systems beyond specifications or systems exceeding 30 VAC
Power Source:
- Battery: Two "AA" alkaline batteries (included)
- Hardwired: 18-30 VAC with common (C) wire
Electrical Rating:
- Terminal Load: 1 amp maximum per terminal
- Setpoint Range: 45°F to 90°F (7°C to 32°C)
- Accuracy: +/- 1°F (+/- 0.5°C)
Display: Large LCD display with bright blue backlight, system indicators
Operating Conditions:
- Ambient: 32°F to 105°F (0°C to 41°C)
- Humidity: 90% non-condensing max
Dimensions: 3.70” H x 5.16” W x 1.38” D
Features:
- Large easy-to-read display with backlight
- Adjustable temperature differentials
- Compressor short cycle protection
- Low battery indicator
- Permanent memory retains settings
- Separate O/B terminals for heat pumps
Thermostat Configuration Options:
- Conventional or Heat Pump systems
- Fahrenheit or Celsius display
- Gas or Electric heat
- 1st and 2nd stage differentials

Operation Instructions

Initial Setup

1. Insert Batteries: Install two "AA" alkaline batteries in the rear compartment, ensuring correct polarity.
2. Power On: If hardwired, connect 18-30 VAC to the C terminal. The display should show the current temperature.
3. Configure System:

Set installer switches on the back: CONV/HP for system type, F/C for temperature units, HG/HE for gas/electric heat.
Press RESET after changes.
Access user options to set 1st stage differential (0.5, 1.0, 2.0°F) and 2nd stage (1.0-6.0°F).

Operating the Thermostat

1. Select Mode: Use SYSTEM switch to choose HEAT, COOL, OFF, or EMER (for heat pumps).
2. Fan Mode: Use FAN switch to choose AUTO or ON.
3. Adjust Temperature: Press UP/DOWN arrows to set desired temperature.
4. Verify Operation: In HEAT, set above room temp; heating indicator displays. In COOL, set below; cooling indicator displays.
Note: Compressor protection may delay operation; press RESET to bypass (resets defaults).

Temperature Display Adjustment

The thermostat has +/-1°F accuracy. Adjust differentials in user options for control tightness. No specific calibration; use a separate thermometer to verify. Relocate if near drafts or heat sources.

Troubleshooting

No Display: Check battery polarity or replace batteries. Verify 24V power if hardwired. Press RESET.
No Heat/Cool: Ensure mode is correct, setpoint appropriate, power on. Check wiring, breakers. For heat pumps, try EMER mode.
Fan Runs Constantly: Set FAN to AUTO, not ON.
Inaccurate Temperature: Ensure proper location away from drafts/heat sources.
Erratic Operation: Reset thermostat. Check for voltage issues.
Low Battery: Replace batteries immediately when indicator appears.
Buttons Not Working: Replace batteries and reset.

Installation Instructions

Warning: Turn off power before installation. For experienced technicians only. Conform to local codes.

Remove Old Thermostat

Turn off power. Remove old thermostat, label wires for terminals. Handle mercury thermostats carefully and dispose properly.

Installing New Thermostat

Separate thermostat from sub-base.
Mount sub-base on wall at 5 feet height, mark and drill holes, use anchors if needed.
Connect wires to terminals per system type (e.g., Rc/Rh for power, W1/E for heat, Y1 for cool, W2 for 2nd heat).
Set installer switches (CONV/HP, F/C, HG/HE).
Push excess wire back, plug hole with insulation to prevent drafts.
Snap thermostat onto sub-base.

Battery Location

Batteries in rear compartment. Replace when low battery indicator shows. Use alkaline "AA" batteries.
If unoccupied for long periods, replace batteries before leaving.

Power Options

Use 24V AC for primary power with batteries as backup, or batteries only.

Thermostat Power Method	Description
Battery Powered	Runs on two "AA" batteries.
Hardwired with Battery Backup	Runs on 18-30V AC from transformer with batteries as backup.

Caution: Ensure correct polarity for batteries. Do not short terminals during testing.