Copeland Comfort Control (White Rodgers) 1C20-102 Vert-Stat

The Copeland Comfort Control (White Rodgers) 1C20-102 is a field-proven 24V single-stage heating thermostat designed for straightforward mechanical reliability in residential and light commercial service. This non-programmable vertical thermostat features a bimetal sensing element and rugged snap-action contacts, making it an ideal choice for gas, oil, and electric heating systems that do not require fan control from the thermostat. With a mercury-free design and an adjustable heat anticipator (0.15 to 1.2 Amps), it allows technicians to fine-tune cycle rates to match the specific current draw of the primary heating control, ensuring consistent setpoint stability and reducing system short-cycling.

Built as a low-voltage heating control, the 1C20-102 covers a temperature range of 50°F to 90°F. The unit includes a switching subbase and utilizes a simple two-wire (RH, W) terminal configuration, facilitating rapid thermostat replacement on legacy vertical mounts. Its classic mechanical room thermostat interface is preferred by contractors who prioritize durability and ease of use in environments where digital complexity is unnecessary. For millivolt applications, the contact arm can be adjusted to the millivolt link setting, providing versatile compatibility across various 24VAC heating applications.

• Universal Application: Compatible with most 24V single-stage gas, oil, or electric furnaces and 2-wire hydronic systems.
• Precision Tuning: The adjustable heat anticipator allows for custom cycle rate optimization based on system amperage.
• Rugged Reliability: Snap-action contacts provide a positive electrical connection and long-term switching performance without the failure points of electronic components.
• Environmentally Compliant: Fully mercury-free construction meets all modern environmental safety standards for disposal and installation.
• Contractor-Friendly Install: Features a vertical rounded profile and included mounting hardware for a clean, professional finish on standard electrical boxes or drywall.

Is the 1C20-102 compatible with heat pumps?
This model is designed for heat-only systems. For single-stage heat pump applications without auxiliary heat, a jumper across W and Y may be required, though a dedicated heat pump thermostat is generally recommended for full functionality.

How do I set the heat anticipator correctly?
The anticipator should be matched to the current rating stamped on the main furnace control or measured via a digital clamp meter on the white (W) wire during a call for heat. Rotating the contact arm lengthens or shortens the cycles to prevent overshooting the setpoint.

Does this thermostat require batteries?
No. As a mechanical thermostat, it operates via bimetal expansion and system power, eliminating nuisance calls caused by dead batteries.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.