D. Compressor Acoustic - Each compressor shall be provided with a removable compressor cover using 1.2-2# density acoustical fiberglass surrounded by a tough, durable, weather-proof, flame resistant covering. E. Compressor Crankcase Heater - Each compressor shall be provided with a wraparound electrical cable resistance heater used to prevent migration and condensation of liquid refrigerant to the compressor crankcase while system is off. 2.4 Evaporator Coil Section A. The direct expansion evaporator coil shall be configured for draw-thru airflow design for uniform air distribution across the coil face. It shall be made with heavy wall rifled seamless copper tubes mechanically expanded into tempered aluminum fins with corrugated fin design and drawn self-spacing collars. Coil end sheets shall be hot-dipped galvanized. All coils shall be factory leak checked under pressure. B. Evaporator coil section be equipped with a 304 stainless steel drain pan with 7/8” stubbed copper tube condensate drain connection. Drain pan shall extend to the entire length and width of the evaporator coil. Evaporator section air path shall be as shown on project drawings. 2.5 Water-Cooled Condensing Section A. The water / glycol condenser heat exchanger shall be a co-axial counter-flow refrigerant type. The condenser(s) shall be selected to maintain low refrigerant operating pressure, while using a minimum quantity of water / glycol. Maximum working pressures shall not exceed 450 psig water side, 450 psig refrigerant side. B. Condenser coil section shall be equipped with a galvanized drain pan with 7/8” stubbed copper tube drain connection. 2.6 Blower / Motor Assembly The evaporator blower assembly shall be belt driven with double width, double inlet housing and forward-curved blades mounted on a solid keyed shaft. The shaft shall be heavy-duty steel, mounted on permanently lubricated, ball bearings which are contained within resilient bearing mounts.
D. Compressor Acoustic - Each compressor shall be provided with a removable compressor cover using 1.2-2# density acoustical fiberglass surrounded by a tough, durable, weather-proof, flame resistant covering. E. Compressor Crankcase Heater - Each compressor shall be provided with a wraparound electrical cable resistance heater used to prevent migration and condensation of liquid refrigerant to the compressor crankcase while system is off. 2.4 Evaporator Coil Section A. The direct expansion evaporator coil shall be configured for draw-thru airflow design for uniform air distribution across the coil face. It shall be made with heavy wall rifled seamless copper tubes mechanically expanded into tempered aluminum fins with corrugated fin design and drawn self-spacing collars. Coil end sheets shall be hot-dipped galvanized. All coils shall be factory leak checked under pressure. B. Evaporator coil section be equipped with a 304 stainless steel drain pan with 7/8” stubbed copper tube condensate drain connection. Drain pan shall extend to the entire length and width of the evaporator coil. Evaporator section air path shall be as shown on project drawings. 2.5 Water-Cooled Condensing Section A. The water / glycol condenser heat exchanger shall be a co-axial counter-flow refrigerant type. The condenser(s) shall be selected to maintain low refrigerant operating pressure, while using a minimum quantity of water / glycol. Maximum working pressures shall not exceed 450 psig water side, 450 psig refrigerant side. B. Condenser coil section shall be equipped with a galvanized drain pan with 7/8” stubbed copper tube drain connection. 2.6 Blower / Motor Assembly The evaporator blower assembly shall be belt driven with double width, double inlet housing and forward-curved blades mounted on a solid keyed shaft. The shaft shall be heavy-duty steel, mounted on permanently lubricated, ball bearings which are contained within resilient bearing mounts.
C13-Engineering-Guide-Spec_Water-Cooled_0618.docx