284536 - Miller Coolmate 3S Water Cooler 115V

Technical Overview of the Miller Coolmate 3S

The Miller Coolmate 3S (SKU: 284536) is a specialized industrial cooling unit designed to manage the thermal loads of high-amperage water-cooled welding applications. Engineered primarily for integration with the Miller Deltaweld 350 and 500 manufacturing systems, this unit operates on standard 115 VAC single-phase power. It features a robust 3-gallon (11.4 liter) polyethylene reservoir, which provides sufficient thermal mass to maintain stable coolant temperatures even during extended duty cycles. The system utilizes a closed-loop design, circulating coolant through a radiator and fan assembly to efficiently dissipate heat generated at the torch head.

Mechanically, the Coolmate 3S is built to withstand the rigors of industrial environments. The pump assembly is designed for consistent pressure delivery, ensuring adequate flow rates for torches rated up to 600 amps. A key feature for maintenance and process control is the integrated flow indicator, located on the front panel, which allows operators to visually verify coolant circulation without interrupting operations. The unit's vertical form factor is optimized for mounting on compatible running gear, specifically fitting beneath the power source in Deltaweld configurations to minimize footprint. The reservoir's material construction resists corrosion and impact, contributing to a long service life in fabrication shops and manufacturing plants.

The cooling capacity is calibrated to prevent overheating in both MIG (GMAW) and TIG (GTAW) torches, protecting internal components and consumables from thermal damage. By maintaining lower operating temperatures, the Coolmate 3S helps preserve the electrical conductivity and structural integrity of power cables and torch heads. This unit is an essential component for setups requiring continuous welding at high currents, where air-cooled torches would be insufficient.