Your commercial Neptunes are warm rinsing because someone set them to warm rinse in the control board. Warm rinse is an owner programable option. Let your student services department know and they will have someone reset the option.
Also, could it be that because of the route the water takes to get to your building that it could be picking up ambient heat? We had that issue in my dorm. The school used steam heat, and the steam and water pipes all traveled thru the same tunnels, so the cold water pipes would pick up heat from the tunnels and end up warm at the tap.
Could it also be that the suppy hoses for the washers are conneced backwards?