Raypak RP2100 601588 Digital Display Pool/Spa Heater Control Board Panel RP 2.2. Used in Excellent Working Condition. Raypak RP2100 601588 Digital Display Pool and Spa Heater Control Board Panel. EChecks must clear before item(s) are released. Tracking information will be available upon request. We do our best to ensure the accuracy of every listings. Unfortunately, do to our high volume, mistakes sometimes occur. Auctiva offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With.