*As of August 15, 2023, the bids are pending at the owner. 1. CHILLED WATER PIPING - MECHANICAL ROOM: 1.1 DEMOLISH AND REPLACE THE EXISTING CHILLED WATER SUPPLY AND RETURN PIPING FROM THE UTILITY TUNNEL IN BUILDING 14E TO THE ISOLATION VALVES ON THE ROOF OF THE BUILDING 28 COMPLEX FOR EACH OF THE FOLLOWING AHU: 28-D-1, 28-C-2, 28-C-1, 28-B-1, 28-A-2. 1.2 DEMOLISH UNUSED EQUIPMENT AND ABANDONED PIPING IN MECHANICAL ROOM 14E. 1.3 FIRE STOP ALL PENETRATIONS THROUGH FIRE WALLS. 2. CHILLED WATER PIPING - ROOFTOP: 2.1 DEMOLISH ALL HEAT TRACE AND INSULATION FROM THE PANEL TO EACH AHUs. 2.2 REPLACE ALL INSULATION. FOLLOW INSULATION MATERIAL SPECIFICATIONS. 2.3 WEATHER SEAL ALL NEW ROOF PENETRATIONS. 2.4 BALANCE ALL CHILLED WATER VALVES AFTER INSTALL. BALANCE THE SYSTEM SO EACH AHU RECEIVES THE DESIRED CHW FLOW RATE. 3. PREHEAT COILS: 3.1 DEMOLISH AND REPLACE THE PREHEAT COILS FOR AHU 28-D-1, 28-C-2, 28-C-1, 28-B-1, AND 28-A-2. 3.2 DEMOLISH AND REPLACE ALL STEAM AND CONDENSATE PIPING FROM THE PREHEAT COILS TO THE LAST GATE VALVE FOR EACH AHU. 3.3 REPLACE ALL INSULATION DAMAGED OR REMOVED DURING DEMOLITION OF THE PREHEAT COILS AND PIPING. FOLLOW INSULATION MATERIAL SPECIFICATIONS. 4. BUILDING AUTOMATION SYSTEM (BAS) UPDATES: 4.1 UPDATE BAS GRAPHIC FOR EACH AHU TO SHOW PREHEAT COIL UPDATES. 4.2 UPDATE BAS GRAPHIC TO REMOVE DEMOLISHED CHW POINTS AND EQUIPMENT. 4.3 UPDATE SIEMENS PPCL CODE. REMOVE OBSOLETE CODE REFERRING TO THE DEMOLISHED BUILDING 28 CHILLED WATER SYSTEM AND ASSOCIATED EQUIPMENT. MODIFY THE PREHEAT CODE FOR EACH AHU TO CHANGE FROM FACE/BYPASS TO FULL FACE PREHEAT COILS AND FROM A SINGLE STEAM CONTROL VALVE TO A 1/3RD 2/3RD STEAM CONTROL VALVE SYSTEM. 4.4 INSTALL LOCAL CHILLED WATER DIFFERENTIAL PRESSURE SENSOR IN MECHANICAL ROOM 14E. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.