Specifications include, but are not limited to: 2.1 Ammonia Based Ice Refrigeration System: 1. Ice Rink Compressors: (2) Bitzer OSKA8561-K (65 Ton) and (1) Bitzer OSKA8571-K (80 Ton) 2. Plate and Frame Chiller: Alfa Laval, Model TK20BW-FD 3. Shell and Tube Oil Cooler: HT Industrial (Chil-Con) 4. Plate and Frame Condenser (Ammonia to Glycol): Alfa Laval, Model M10BW-FD 5. Plate and Frame Heat Exchanger (Glycol to Water): Alfa Laval, Model M15B-FG 6. Pumps: B&G 7. Cooling Tower: Evapco, Model LTSE-10112F 8. Glycol Balance Valves: B&G 9. Pump Suction Diffusers: B&G 10. Glycol Relief Valves: Watts ; 2.1.2 General Monthly Maintenance (Performed monthly or as noted): 1. Test glycol strength and inhibitor levels (after 3 months) 2. Test sub‐soil glycol strength and inhibitor levels (after 3 months) 3. Test condenser glycol strength and inhibitor levels (after 3 months) 4. Test oil condition (after 3 months) 5. Change oil filter on compressors as necessary ; 2.1.3 Bitzer - Monthly Maintenance 1. Oil and grease bearings as necessary 2. Check drives for tightness and alignment. Tighten coupling bolts on direct drive compressors. 3. Check condenser performance to compare with design 4. Check for any evidence of corrosion