
Intermatic GMXST-I-240 Timer
Professional-grade Intermatic GMXST-I-240 electromechanical timers are the industry standard for high-amperage 208/240V SPDT switching in demanding HVACR environments. Built for 24-hour time control, this unit features a true clock face with 96 captive trippers, allowing for 15-minute interval scheduling across a 24-hour cycle. The robust 21A resistive rating and 2 HP motor load capacity at 240VAC make it ideal for managing commercial refrigeration, ventilation fans, and industrial pumping systems where reliability is non-negotiable. Encased in a UL Type 1 indoor plastic enclosure, the design includes finger-safe terminals to protect technicians during field wiring and a manual 3-way override switch for immediate system testing or maintenance. This 24-hour electromechanical timer accepts up to #12 AWG wire and operates reliably in extreme temperatures ranging from -40?F to 185?F, ensuring consistent performance in unconditioned mechanical rooms.
Key Benefits- High-Capacity Switching: Handles up to 21 Amps resistive and 2 HP motor loads at 240V, perfect for heavy-duty HVACR equipment.
- Precision Scheduling: Includes 96 captive trippers for detailed 15-minute ON/OFF cycles without the risk of losing small parts.
- Technician Safety: Features finger-safe terminals and a 3-way manual override (ON/AUTO/OFF) for safe, efficient servicing.
- Universal Enclosure: The NEMA 1 indoor plastic enclosure provides ample interior space for adding field-installed contactors or accessories.
- Environmentally Resilient: Engineered with a synchronous clock drive that remains accurate in temperatures from -40?F upward to 185?F.
How do I set the current time on the GMXST-I-240?
Grasp the outer edge of the large yellow dial and pull it gently outward. Rotate the dial in either direction until the current time aligns with the center time pointer at the 6 o'clock position, then release the dial to re-engage the gears.
What is the minimum switching interval for this unit?
The Intermatic GMXST-I-240 supports a minimum ON/OFF time of 15 minutes, utilizing the captive trippers integrated into the 24-hour dial.
Can this timer be used for outdoor installations?
The standard GMXST-I-240 comes in a Type 1 plastic enclosure designed for indoor use. For outdoor applications requiring protection against rain or sleet, a Type 3R enclosure version is required.
This item is not eligible for free shipping.
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.
Intermatic GMXST-I-240 Timer
Professional-grade Intermatic GMXST-I-240 electromechanical timers are the industry standard for high-amperage 208/240V SPDT switching in demanding HVACR environments. Built for 24-hour time control, this unit features a true clock face with 96 captive trippers, allowing for 15-minute interval scheduling across a 24-hour cycle. The robust 21A resistive rating and 2 HP motor load capacity at 240VAC make it ideal for managing commercial refrigeration, ventilation fans, and industrial pumping systems where reliability is non-negotiable. Encased in a UL Type 1 indoor plastic enclosure, the design includes finger-safe terminals to protect technicians during field wiring and a manual 3-way override switch for immediate system testing or maintenance. This 24-hour electromechanical timer accepts up to #12 AWG wire and operates reliably in extreme temperatures ranging from -40?F to 185?F, ensuring consistent performance in unconditioned mechanical rooms.
Key Benefits- High-Capacity Switching: Handles up to 21 Amps resistive and 2 HP motor loads at 240V, perfect for heavy-duty HVACR equipment.
- Precision Scheduling: Includes 96 captive trippers for detailed 15-minute ON/OFF cycles without the risk of losing small parts.
- Technician Safety: Features finger-safe terminals and a 3-way manual override (ON/AUTO/OFF) for safe, efficient servicing.
- Universal Enclosure: The NEMA 1 indoor plastic enclosure provides ample interior space for adding field-installed contactors or accessories.
- Environmentally Resilient: Engineered with a synchronous clock drive that remains accurate in temperatures from -40?F upward to 185?F.
How do I set the current time on the GMXST-I-240?
Grasp the outer edge of the large yellow dial and pull it gently outward. Rotate the dial in either direction until the current time aligns with the center time pointer at the 6 o'clock position, then release the dial to re-engage the gears.
What is the minimum switching interval for this unit?
The Intermatic GMXST-I-240 supports a minimum ON/OFF time of 15 minutes, utilizing the captive trippers integrated into the 24-hour dial.
Can this timer be used for outdoor installations?
The standard GMXST-I-240 comes in a Type 1 plastic enclosure designed for indoor use. For outdoor applications requiring protection against rain or sleet, a Type 3R enclosure version is required.
This item is not eligible for free shipping.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Professional-grade Intermatic GMXST-I-240 electromechanical timers are the industry standard for high-amperage 208/240V SPDT switching in demanding HVACR environments. Built for 24-hour time control, this unit features a true clock face with 96 captive trippers, allowing for 15-minute interval scheduling across a 24-hour cycle. The robust 21A resistive rating and 2 HP motor load capacity at 240VAC make it ideal for managing commercial refrigeration, ventilation fans, and industrial pumping systems where reliability is non-negotiable. Encased in a UL Type 1 indoor plastic enclosure, the design includes finger-safe terminals to protect technicians during field wiring and a manual 3-way override switch for immediate system testing or maintenance. This 24-hour electromechanical timer accepts up to #12 AWG wire and operates reliably in extreme temperatures ranging from -40?F to 185?F, ensuring consistent performance in unconditioned mechanical rooms.
Key Benefits- High-Capacity Switching: Handles up to 21 Amps resistive and 2 HP motor loads at 240V, perfect for heavy-duty HVACR equipment.
- Precision Scheduling: Includes 96 captive trippers for detailed 15-minute ON/OFF cycles without the risk of losing small parts.
- Technician Safety: Features finger-safe terminals and a 3-way manual override (ON/AUTO/OFF) for safe, efficient servicing.
- Universal Enclosure: The NEMA 1 indoor plastic enclosure provides ample interior space for adding field-installed contactors or accessories.
- Environmentally Resilient: Engineered with a synchronous clock drive that remains accurate in temperatures from -40?F upward to 185?F.
How do I set the current time on the GMXST-I-240?
Grasp the outer edge of the large yellow dial and pull it gently outward. Rotate the dial in either direction until the current time aligns with the center time pointer at the 6 o'clock position, then release the dial to re-engage the gears.
What is the minimum switching interval for this unit?
The Intermatic GMXST-I-240 supports a minimum ON/OFF time of 15 minutes, utilizing the captive trippers integrated into the 24-hour dial.
Can this timer be used for outdoor installations?
The standard GMXST-I-240 comes in a Type 1 plastic enclosure designed for indoor use. For outdoor applications requiring protection against rain or sleet, a Type 3R enclosure version is required.
This item is not eligible for free shipping.
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.











