The Pelican Wireless Systems TS250 is a commercial-grade, internet-enabled programmable thermostat featuring a built-in carbon dioxide (CO₂) sensor. It is primarily engineered for demand-controlled ventilation (DCV) and indoor air quality monitoring. It manages HVAC equipment while optimizing fresh air circulation based on room occupancy

Key Specifications & HardwareControl Stages: Supports up to 2 Heating and 2 Cooling stages (2H/2C) for conventional systems or heat pumps.Power Requirement: Hardwired 24VAC (23–30VAC range), 60Hz.Physical Interface: Includes a backlit physical touchscreen display. Note that while it tracks air quality, the raw CO₂ parts-per-million (ppm) values are only viewable on the web portal or app, not on the physical screen.Security: Features a keypad lockout and a physical, internal tamper-resistant chassis lock managed via a 7/64" Allen wrench.Dimensions: 3.5" H x 6.0" W x 1.5" D.Connectivity & Smart FeaturesWireless Mesh Network: The TS250 utilizes an internal wireless mesh network to communicate. It connects to the internet via a central Pelican GW400 Gateway rather than connecting directly to local Wi-Fi.Pelican Web App Control: Authorized users can handle virtual, central management through any browser. The platform offers daily, 5-2, or 7-day multi-thermostat group scheduling.Analytics & Alerts: System performance data, HVAC demand, and historical CO₂ graphs are tracked online. Automatic email or SMS alerts deploy immediately if a system fault is detected.Installation & Wiring OptionsThe TS250 is designed to mount over standard horizontal single-gang electrical boxes. It supports two primary field-wiring methods:Conventional Wiring: Utilizes standard multi-conductor thermostat wires directly to industry terminals.3-Wire Retrofits: Includes a proprietary WM500 limited wiring relay pack. This allows full 2H/2C control over older building infrastructure utilizing only three existing physical wires between the walls.