042288 - Miller Coolmate 4 Water Cooler 115V

Industrial-Grade Cooling Performance

The Miller Coolmate 4 Coolant System (042288) is engineered to provide superior thermal management for high-amperage water-cooled welding applications. Designed for industrial environments, this system features a robust 1/4 HP motor that is thermally protected to guard against overheating during extended duty cycles. The unit utilizes a brass-body, positive-displacement rotary vane pump, which is renowned for its ability to deliver consistent coolant flow and pressure, ensuring stable operating temperatures for connected equipment.

Advanced Fluid Dynamics and Construction

At the core of the Coolmate 4 is an efficient fin-and-tube heat exchanger that maximizes heat dissipation. The system offers a rated cooling capacity of 6,070 BTU (1,780 Watts) and a maximum capacity of up to 18,000 BTU (5,500 Watts), making it suitable for cooling torches and guns rated up to 600 amps. The fluid circuit is designed to maintain a constant flow of coolant, which serves a dual purpose: it keeps the pump primed for immediate response and significantly reduces the potential for algae buildup within the tank. A factory-set pressure relief valve, calibrated to 60 PSI, maintains consistent system pressure, protecting downstream components from over-pressurization.

Durability and Maintenance

The Coolmate 4 is housed in a tough, one-piece rotomolded polyethylene case. This construction is not only rustproof but also impact-resistant, ensuring longevity in harsh shop environments. The unit weighs 38 lbs (17 kg) dry and features a molded-in carrying handle for portability. Maintenance is streamlined with an easily accessible coolant filter located on the front panel, allowing for quick inspection and cleaning to prevent debris from entering the pump or torch lines. The filler spout is also molded directly into the case, featuring a wide mouth for spill-free refilling of the 4-gallon (15 L) reservoir.