The Intermatic TN311C Timer is a high-capacity 24-hour mechanical plug-in timer engineered for demanding HVACR and industrial indoor applications. Built with a grounded 3-prong receptacle and a NEMA 5-15 plug configuration, this heavy-duty timer is rated for 15 Amps resistive and 1750 Watts tungsten, making it a reliable solution for managing window air conditioners, heaters, and high-pressure sodium lighting. The unit supports up to 3 ON/3 OFF settings per day using removable trippers, with a minimum switching interval of 30 minutes. Its robust motor is rated at 1/3 HP at 125 VAC, ensuring it can handle the inductive inrush of ventilation fans and small motor loads without failure. For technicians performing maintenance or testing, the manual override switch allows for immediate power control without disrupting the programmed schedule. This electromechanical time switch eliminates the need for complex digital programming, providing a durable "set it and forget it" solution for localized power management. Key Benefits Heavy-Duty Load Handling: Rated for 15A resistive and 1/3 HP motor loads, ideal for HVAC units and appliance control. Simplified Scheduling: Features an easy-set dial with 3 ON/3 OFF events per 24-hour period for repeatable daily cycles. Direct Plug-In Design: Plugs directly into standard 125 VAC wall outlets with a grounded 3-prong connection for safety and stability. Manual Override: Includes a top-accessible manual switch to bypass the timer for instant equipment testing. Flexible Increments: Minimum 30-minute settings allow for precise enough control for most climate and lighting needs. Common Questions Can this timer handle a portable air conditioner? Yes, provided the unit does not exceed 15 Amps resistive or 12 FLA/72 LRA. It is specifically rated for 1/3 HP motor loads typically found in window and portable AC units. What is the minimum time between ON and OFF settings? The minimum interval is 30 minutes. The dial allows for multiple trippers to be installed for more frequent cycles if additional trippers are purchased. Does the timer lose its schedule during a power outage? As a mechanical timer, the internal motor stops during a power loss. You will need to rotate the dial to the current time of day once power is restored to resume the schedule. 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.
