Hammond PWS7502A115N4LG 17750 BTU/H Air/Water Heat Exchanger, 115V Light Gray

The PWS7502A115N4LG is an air/water heat exchanger (AW HX unit) rated at 17750 BTU/H for 115 V supply. It belongs to the PWS Series of bolt-on cooling units intended to be door and side mounted on electrical panels, and it is aimed at panel builders, OEM engineers and facilities teams who need to remove heat from sealed electrical enclosures using a water source rather than ambient air.

The part description rates the unit NEMA 3R/4 and gives its colour as Lt. Gray. The part drawing shows an overall height of 1490 mm (58.66 in) and a width of 520 mm (20.47 in), with twelve 10.70 mm (0.42 in) mounting holes laid out on the PWS 7502 drilling template. Shipping weight is 90 lbs (40.82 kg), so plan for a two-person lift when hanging it on a door or side wall.

According to the PWS Series manual, the cooling liquid must be at least 10 C colder than the heat exchanger inlet air, the maximum permissible operating pressure is 10 bar, and the cooling water should be connected with flexible pressure-resistant (>10 bar) hose secured with clamps. Supply voltage must stay within ± 10% and frequency within ± 3 Hz of the ID plate values. A door contact switch is recommended so the unit turns off when the enclosure door is opened.

The PWS7502A115N4LG ships with a mounting cutout, manual and technical data sheet, and the accessory pack typically includes sealing strips, threaded mounting studs, mounting hardware, a condensate hose and a door contact connector/jumper. The unit is listed as REACH and RoHS compliant, and all devices are checked for leaks before leaving the factory.