Sanitary Ammonia Water Chiller Package Skid Package Manufactured by Roth Engineering 502-459-3137, previously installed in Papa John's Jackson Mississippi facility. This was used as makeup water for pizza dough. Includes a 2003 30/25 hp Frick Rotary Screw Compressor. Model: XJS95S0309A. Refrig: R717. This is a complete ammonia system skid mounted with a falling film Chester-Jensen Co plate chiller.