Trane 1H/1C Thermostat Operation Manual

The Trane 1H/1C Thermostat is a non-programmable wall-mounted control designed for single-stage heat and single-stage cool conventional HVAC systems. It provides simple, reliable temperature control with an LCD display for current temperature, setpoints, and system modes. Ideal for residential applications, it supports automatic changeover and fan control. Below are the key specifications and operation instructions.

1. Key Specifications 2. Operation Instructions 2.1. Initial Setup 2.2. Changing System Mode 2.3. Changing Fan Mode 2.4. Adjusting Temperature Setpoints 2.5. Indicators and Overrides 2.6. Troubleshooting 3. Installation Instructions 3.1. Pre-Installation Considerations 3.2. Wiring Diagrams 3.3. Configuration Options 4. Calculation Tool

Key Specifications

Type: Non-programmable 1-Heat/1-Cool thermostat
Compatibility:
- Single-stage conventional heat/cool systems
- Gas/electric, heat pump (with auxiliary heat options)
- Fan control (G terminal)
Display:
- LCD for temperature, setpoints, system modes (Heat, Cool, Off, Auto)
- Fan modes (Auto, On)
Temperature Range: 45°F to 99°F (heating), 50°F to 99°F (cooling); accuracy ±1°F
Power: 20-30 VAC from HVAC transformer; 2 AA batteries for backup
Dimensions: 4.7 in. H x 3.4 in. W x 1.0 in. D
Features:
- Automatic changeover
- Deadband adjustment (2-6°F)
- Button lock
- Cycling rate control (compressor off time)
Compliance: UL listed; complies with NEC requirements

Operation Instructions

Initial Setup

1. Power On: After installation, the thermostat powers up and displays current room temperature.
2. Configure Basics: Use UP/DOWN buttons to set initial heat/cool setpoints.
3. System Check: Enter configuration mode to verify system type (Option 01 for 1H/1C Conventional).

Changing System Mode

1. Press the MODE button to cycle through: OFF, HEAT, COOL, AUTO.
2. AUTO mode switches between heat and cool based on setpoints and deadband.
3. Display shows selected mode and setpoint.

Changing Fan Mode

1. Press the FAN button to toggle: AUTO (runs with system), ON (continuous).
2. Useful for air circulation without heating/cooling.

Adjusting Temperature Setpoints

1. In HEAT mode, use UP/DOWN to set heating setpoint.
2. In COOL mode, adjust cooling setpoint similarly.
3. Changes take effect immediately; system maintains until manually adjusted.

Indicators and Overrides

1. Indicators: Space occupied/unoccupied, timed override, button lock.
2. Overrides: Temporary setpoint changes; no permanent hold needed.
3. Lock: Hold UP and DOWN for 5 seconds to lock/unlock buttons.

Troubleshooting

Blank Display: Check batteries or HVAC power; replace AA batteries.
No Heat/Cool: Verify mode, setpoint; check wiring and fuses.
Erratic Display: Reset by removing batteries for 1 minute.
Error Codes: E1 (sensor fault), E2 (system fault); refer to test mode.

Installation Instructions

Warning: Only qualified personnel should install. Disconnect power before wiring. Improper installation can cause injury or equipment damage.

Pre-Installation Considerations

Mount 54-60 in. above floor, away from drafts, direct sun, or heat sources.
Maximum wire length: 250 ft to HVAC equipment.
Use 18-22 AWG thermostat wire.

Wiring Diagrams

For 1H/1C Conventional (System Type Option 01):

Terminal	Connection
R	24V Power (Red)
W	Heat (White)
Y	Cool (Yellow)
G	Fan (Green)
C	Common (Blue, optional for battery backup)

Diagrams: Connect to furnace/AC terminals: R to R, W to W, Y to Y, G to G. No polarity.

Configuration Options

Remove cover, press HOLD and UP simultaneously for 8 seconds to enter config mode.
Set Option 01: 1H/1C Conventional.
Adjust deadband (2-6°F), cycling rate.
Exit by pressing HOLD.

Calculation Tool

Estimate cooling runtime based on temperature difference (ΔT) and cycling rate. Assumes standard 30-min cycle (2 cycles/hour); runtime = (ΔT / 20) * cycle time.