Intermatic GM40AV-QW Timer

The Intermatic GM40AV-QW is a robust 7-day mechanical time switch engineered for demanding commercial and industrial applications. This 40 Amp universal electromechanical timer features a versatile SPDT/DPDT configuration, allowing it to control diverse loads including lighting, pumps, and HVAC motors. Designed with multi-voltage capability, it automatically adjusts to input voltages between 120V and 277V, eliminating the need for separate models. The unit is housed in a Type 3R outdoor enclosure, ensuring durability in harsh environments. With its battery backup (QW model), the quartz drive maintains accurate timekeeping during power outages for up to 72 hours. Contractors value the captive trippers which prevent loss and provide 15-minute minimum switching intervals. Whether managing HID lighting controls or water heater scheduling, this switch provides reliable 24-hour/7-day timing with manual override functionality for immediate system testing or maintenance.

• Universal Voltage Input: Automatic detection of 120, 208, 240, or 277 VAC simplifies installation and inventory.
• High Load Capacity: Rated for 40 Amps resistive, 40 Amps inductive, and up to 2 HP at 240V for heavy-duty motor control.
• Quartz Drive Backup: Integrated nickel-cadmium battery ensures schedule retention during utility power fluctuations.
• Flexible Switching: SPDT and DPDT contacts accommodate complex wiring requirements for N.O. and N.C. applications.
• Weatherproof Reliability: NEMA 3R rainproof plastic enclosure survives exposure to moisture and UV rays.

Common Questions

How do I wire the Intermatic GM40AV-QW for 240V dual-pole operation?
The unit features five terminals. For 240V DPDT operation, supply lines connect to terminals 1 and 2, while the load connects across the designated normally open contacts. Always verify the wiring diagram inside the enclosure door to match your specific resistive or inductive load requirements.

Can this timer be used for outdoor swimming pool pumps?
Yes, the 40 Amp rating and Type 3R enclosure make it suitable for pool pump automation. It handles the high inrush current of motors up to 2 HP at 240V, though a dedicated GFCI breaker is required for code compliance in wet areas.

Does the battery backup need manual charging before commissioning?
The quartz drive begins charging once line voltage is applied. For full 72-hour carryover protection, the system should be powered for at least 24 hours. The mechanical clock face will continue to rotate during parity outages, preventing the need for field recalibration.

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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.