Venstar VST1050 Thermostat

The Venstar VST1050 is a high-performance 2H/2C 5+2 day programmable thermostat engineered for precise climate management in commercial and residential applications. Serving as a robust 33CSSP2-WC replacement and a direct equivalent to the P474-1050, this unit offers advanced staging for systems requiring two heating and two cooling stages. It features a large, backlit Thermoglow display for high visibility in low-light mechanical rooms and is compatible with gas, electric, heat pump, and hydronic systems. The integrated non-volatile memory ensures all setpoints and schedules are preserved during power interruptions, while the keypad lockout feature prevents unauthorized setpoint drifts, maintaining system efficiency and balancing load requirements.

• Universal Compatibility: Operates effectively with 2-stage heating and 2-stage cooling configurations, including heat pump and dual fuel setups.
• System Reliability: Features built-in 5-minute compressor protection and an adjustable deadband to prevent short-cycling and equipment wear.
• Enhanced Control: Supports auto-changeover functionality, allowing the system to switch between heating and cooling based on demand without manual intervention.
• Contractor Friendly: Designed with a small footprint for easy retrofitting and clear terminal designations (G, Y1, W1, O/B, R, C, Y2, W2).

• Is a common wire required for the VST1050? Yes, this hardwired thermostat requires both the R (24 VAC) and C (Common) wires for operation. If a common wire is unavailable, an Add-A-Wire accessory (ACC0410) can be used.
• Can this replace a Totaline or Carrier thermostat? The Venstar VST1050 is the designated commercial thermostat replacement for several legacy models, including the Carrier 33CSSP2-WC and Totaline P474-1050.
• How does the 5+2 day programming work? Technicians can configure separate schedules for weekdays and weekends, with up to four unique time periods (Morning, Day, Evening, Night) per day to optimize energy savings.

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.