The Intermatic GM40AV-W is a heavy-duty electromechanical time switch designed for HVACR, lighting, and industrial motor control. Featuring auto-voltage detection, this universal timer automatically adjusts between 120V and 277V, eliminating the need for manual DIP switch settings or jumper wires. As a 7-day timer, the "W" model supports complex weekly scheduling with up to 42 ON/OFF operations, making it ideal for commercial refrigeration defrost cycles or ventilator fan control. The DPDT switching configuration (Double Pole Double Throw) provides 40A resistive capacity per pole, allowing contractors to manage two independent circuits or dual-phase equipment from a single device. Housed in a NEMA 3R outdoor enclosure, the unit features captive trippers that can't be lost and a manual three-way override switch (ON/OFF/AUTO). With built-in LED status indicators for power and load, this 40 amp timer ensures reliable performance in demanding environments from -40°F to 131°F. Key Benefits for the Job Site Universal Voltage Compatibility: Automatically senses 120V, 208V, 240V, or 277V VAC for "one-box" truck stock versatility. High-Amperage DPDT Contacts: Rated for 40A resistive and 2HP motor loads, providing robust control for pumps and compressors. 7-Day Custom Scheduling: Provides distinct daily programs to meet specific energy-saving or operational requirements. Rugged Environmental Protection: The rain-proof plastic enclosure resists corrosion and survives extreme temperature swings. Simplified Installation: Features a snap-in mechanism and screw box lug terminals for faster wiring and retrofitting. Common Questions from Contractors Can this timer be used for three-phase equipment? No, this unit is designed for single-phase loads. For three-phase applications, use this timer as a pilot to trigger a properly rated contactor. How do I handle a power outage with an electromechanical dial? The GM40AV-W relies on line power for timing. For applications requiring time preservation during outages, consider the "Q" version with battery backup. What is the minimum switching interval? The captive trippers allow for a minimum ON/OFF time of 2 hours, with up to 6 operations per day possible on the weekly dial. 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.
