The Intermatic GM40AV Timer is a high-capacity, 40A DPDT mechanical time switch engineered for the rigors of commercial HVACR and industrial applications. This 24-hour universal time control features advanced auto-voltage detection, allowing it to automatically sense and adjust to input voltages ranging from 120V to 277V AC without the need for manual DIP switches or selector pins. Built with a DPDT switching configuration (2 NO and 2 NC contacts), it provides versatile control for multiple circuits or high-amperage loads including lighting, motors, and pumps. Housed in a rugged NEMA 3R outdoor enclosure, this Intermatic GM40AV time switch is designed for both interior and exterior installations. The unit includes captive trippers that cannot be lost, allowing for up to 48 ON/OFF operations per day with 15-minute minimum intervals. For technicians in the field, the manual three-way override switch (ON/OFF/AUTO) and clear LED indicators for power and status provide immediate visual confirmation of system performance. This industrial-grade electromechanical timer ensures reliable automation for commercial refrigeration, aeration systems, and general-purpose electrical circuits. Key Benefits Universal Compatibility: Features auto-voltage sensing from 120V to 277V, eliminating wiring errors during multi-voltage installs. High Amperage Rating: Robust 40 Amp resistive rating allows for direct control of heavy-duty HVACR loads and 2 HP motors. Weatherproof Construction: The NEMA 3R plastic enclosure protects internal components from rain, ice, and dust in demanding environments. Flexible Programming: Equipped with captive trippers for precise 15-minute scheduling intervals that won't fall out or get lost. Field Serviceability: Includes a manual override and LED status indicators for fast troubleshooting and system testing. Common Questions Can the Intermatic GM40AV be used for 3-phase loads? No, this unit is specifically designed to control one or two single-phase loads. Professionals should use a contactor in conjunction with this timer if 3-phase control is required. What wire size is recommended for a 40A load? For maximum safety and performance at 40 Amps, use #8 AWG copper conductors rated for at least 90?C. Does the GM40AV have a battery backup? The standard GM40AV model is a synchronous drive unit; if you require a 72-hour carry-over for power outages, the "Q" version (GM40AV-Q) is the appropriate specification. 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.
