Venstar VST1010 Prog Tstat

The Venstar VST1010 is a commercial-grade 1-day programmable thermostat engineered for precise 2-stage heating and 2-stage cooling applications. As a veteran-preferred 2H/2C digital thermostat, it serves as the direct drop-in replacement for legacy models including the 33CSSN2-WC, P474-0100, and P474-1010. This unit is compatible with 24V gas/electric systems, heat pumps, and hydronic heating, ensuring versatile field utility. The Thermoglow backlit display and soft-touch buttons provide high visibility and tactile feedback for technicians during setup and end-user adjustments. Utilizing non-volatile memory, the VST1010 retains all custom programming and setpoints during power failures without requiring battery backup. Advanced features include auto changeover functionality, a 5-minute compressor time guard to prevent short-cycling, and a keypad lockout mode to maintain setpoint integrity in high-traffic or commercial environments.

• Direct Retrofit Compatibility: Seamlessly replaces 33CSSN2-WC and P474-1010, reducing labor time during system upgrades.
• Multi-Stage Performance: Supports 2H/2C systems, providing optimized control for dual-stage compressors and auxiliary heat strips.
• Reliable Logic: Features auto changeover and adjustable deadbands to maintain consistent ambient temperatures within 1° of the setpoint.
• Critical Protection: Integrated compressor lockout and cycle limiters safeguard equipment against rapid cycling and premature component wear.
• User-Friendly Interface: Large backlit display shows heating and cooling setpoints simultaneously, streamlining diagnostic walk-throughs.

Does this unit require a common wire for installation?
Yes, as a 24V hardwired programmable thermostat, a C-wire (common wire) is required to power the digital display and internal relay logic. If a common wire is not present, a 270 ohm, 10-watt power resistor or an "Add-A-Wire" kit may be necessary.

Can the VST1010 control a heat pump with auxiliary heat?
Absolutely. This HVAC thermostat is designed for 2-stage heat pumps. Ensure the internal jumpers or advanced setup steps are configured correctly for O/B reversing valve operation and emergency heat requirements.

How do I prevent unauthorized temperature adjustments?
The Venstar VST1010 includes a "Security/Lockout" feature found in the advanced setup menu. Once enabled, setpoints can only be adjusted by authorized personnel, which is ideal for commercial or rental properties.

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.