The American Standard Ceratherm T050.111 is a non-programmable, line-voltage thermostat designed for controlling electric baseboard heaters, convectors, and fan-forced heaters. It features a manual temperature dial, a built-in temperature sensor, a large, easy-to-read scale, a built-in level for proper installation, and a safety cover to prevent accidental adjustment. It is rated for 120V/240V AC, 60Hz, up to 22A (2640W @ 120V, 5280W @ 240V). Below are key sections for safety, features, installation, wiring, operation, and troubleshooting.
Key components: Manual temperature dial, Built-in mercury-free temperature sensor, Large easy-to-read temperature scale, Built-in level, Safety cover, Line-voltage terminals.
| Feature | Description |
|---|---|
| Temperature Dial | Manual rotary control for setting desired room temperature |
| Built-in Sensor | Measures ambient room temperature for accurate control |
| Large Scale | Clear, numbered temperature scale (e.g., 50°F - 90°F) |
| Built-in Level | Ensures thermostat is mounted perfectly horizontal for proper operation |
| Safety Cover | Transparent cover prevents accidental contact or adjustment |
| Line-Voltage Terminals | Screw terminals for connecting 120V/240V power and heater load |
| ON/OFF Switch | Some models include a manual power switch (check specific model) |
| Heavy-Duty Construction | Designed for reliable, long-term use with electric heating systems |
| Convection Sensing | Designed to be affected by natural air currents for stable temperature |
| Mounting Plate | Separate wall plate for easy installation and alignment |
Unpack and inspect contents. Ensure power is OFF at the circuit breaker.
WARNING! Installation must be performed by a qualified electrician in accordance with local and national electrical codes (e.g., NEC). Turn OFF power at main breaker before beginning.
Connect wires to the line-voltage screw terminals on the mounting plate.
CAUTION! Ensure total connected heater load does not exceed thermostat rating (22A). For multiple heaters, calculate total amperage. Incorrect wiring can cause fire, electric shock, or damage.
Operation is simple and manual via the temperature dial.
To Set Temperature: 1. Lift or open the safety cover if present. 2. Rotate the dial clockwise to increase the temperature setting (make room warmer). 3. Rotate the dial counter-clockwise to decrease the temperature setting (make room cooler). 4. Align the desired temperature number with the indicator mark on the thermostat case. 5. Close the safety cover.
How it Works: The internal bi-metal coil expands or contracts with room temperature changes. When the room temperature drops below the set point, the coil contracts, closing an electrical switch to turn ON the heater. When the room warms up past the set point, the coil expands, opening the switch to turn OFF the heater. This cycle maintains a stable room temperature.
Note: There is a slight temperature differential (about 1-2°F) between turn-on and turn-off to prevent rapid cycling.
The thermostat is factory calibrated. If you suspect it is not reading accurately:
Tip: Setting the dial to a specific number does not guarantee the room will be exactly that temperature due to factors like room insulation, heater size, and thermostat location. Use the dial to find a comfortable setting.
Requires minimal maintenance.
CAUTION! Never attempt to disassemble the thermostat. There are no user-serviceable parts inside. If faulty, replace the entire unit.
This product is Listed to UL Standard 60730-1 and 60730-2-9. It complies with relevant FCC rules for unintentional radiators (Part 15, Class B). This device may not cause harmful interference and must accept any interference received.
American Standard is a trademark. Specifications subject to change without notice.
For Support: Contact American Standard Heating & Air Conditioning or refer to the installer who provided the product. Model-specific information may be found at www.americanstandard.com.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Heater does not turn ON | Power OFF, tripped breaker, loose wire, thermostat set too low, faulty heater. | Check circuit breaker; ensure power is ON. Verify thermostat setting is above room temp. Check wiring connections. Test heater directly (bypass thermostat with caution). |
| Heater does not turn OFF | Thermostat set too high, faulty thermostat switch (stuck closed), incorrect wiring. | Lower thermostat setting. Turn thermostat to minimum; if heater stays on, thermostat is likely faulty and must be replaced. Verify wiring. |
| Room temperature is not accurate | Poor thermostat location (draft, sun, heat source), thermostat not level, needs calibration. | Relocate thermostat to a proper interior wall. Ensure it is mounted level. Check calibration with a separate thermometer. |
| Thermostat clicks frequently (short cycling) | Heater oversized for room, thermostat in draft or direct airflow, anticipator issue. | Ensure thermostat is not in direct airflow from heater or register. This may be normal operation to maintain tight temperature control. |
| Heater cycles ON/OFF but room is too cold/hot | Thermostat setting incorrect, heater under/over-sized for room, heat loss/gain in room. | Adjust thermostat setting. Evaluate if heater capacity matches room size and insulation. |
Replacement: If the thermostat is determined to be faulty, replace it with an identical or compatible model. Always turn OFF power before replacement.
Service: For persistent issues, contact a qualified electrician or HVAC technician.