Robertshaw RS8210 Thermostat

The Robertshaw RS8210 is a trade-grade non-programmable 2H/1C thermostat designed for multi-stage heating and cooling systems. Built for the Pro-Series wall thermostat line, this 24V AC hardwired or battery-operated unit provides precise control for gas, oil, electric, and heat pump systems with auxiliary or emergency heat. It is the direct replacement for the legacy RS2210 and Aprilaire 8448 models, fitting the same performance profile with a modernized 4.6-square-inch blue backlit display.

For technicians, the RS8210 features large terminal blocks (R, C, Y, W2, W/E, G, O, B) and a universal sub-base to streamline the HVAC thermostat installation process. The internal technician setup menu allows for fine-tuning, including adjustable temperature differential (swing) settings and setpoint limits to prevent system short-cycling. With a temperature control range of 44°F to 90°F and ±1°F display accuracy, it is a reliable choice for millivolt applications and standard residential multi-stage setups.

Key Technical Benefits

• Multi-Stage Performance: Optimized for 2-stage heating and 1-stage cooling, including heat pump compatible systems with EmH settings.
• Dual Power Capability: Functions on standard 24V AC systems or 2 AAA batteries, ensuring non-programmable thermostat reliability during power outages.
• System Protection: Includes a five-minute selectable compressor delay to prevent damage from rapid cycling.
• Enhanced Readability: High-contrast 4.6-sq. in. backlit display provides clear visibility in low-light utility spaces.
• Installation Versatility: Direct mounting to walls or junction boxes with dedicated O and B terminals for various reversing valve configurations.

Frequently Asked Questions

Is the Robertshaw RS8210 compatible with heat pumps?
Yes, it is specifically designed for 2-stage heat / 1-stage cool systems and is compatible with heat pumps that utilize auxiliary or emergency heat sources.

Does this unit require a "C" wire?
While a common wire (C terminal) is recommended for hardwired power, this model can operate solely on two AAA batteries, making it an ideal choice for older HVAC thermostat replacement projects where a C-wire is not present.

Can I adjust the sensitivity of the temperature control?
The RS8210 features an adjustable temperature differential (swing) setting within the installer menu, allowing you to customize system cycle rates for efficiency and comfort.

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.