2026C032 - Heating Glycol Replacement

The provided text appears to be a Request for Proposal (RFP) document for a construction project at the Performing Arts Center in Anchorage, Alaska. Here is a summary of the key points: **Project Overview:** * The project involves the replacement of the existing glycol heating fluid in the building's hydronic heating system. * The system volume is estimated to be approximately 5,000 gallons, based on as-built drawings. * The project requires the draining, flushing, and cleaning of all existing hydronic heating system piping and terminal units. **Scope of Work:** * The contractor shall provide all materials and labor necessary for a complete and operable system. * The contractor shall field verify all items scheduled for demolition prior to start of work. * The contractor shall comply with all regulatory requirements for the addition of non-potable chemicals to building mechanical systems and discharge to the public sewage system. **Technical Requirements:** * The contractor shall use a heavy-duty premixed hydronic grade propylene antifreeze at a rate of 50% water to 50% glycol for a -29 degrees F protection or better. * The contractor shall flush and drain the entire system, and dispose of the existing water/glycol mixture off-site. * The contractor shall clean all strainer baskets and flow control valve cartridges of debris after the initial flush and drain of the system. * The contractor shall perform tests to determine the concentration of glycol heating solution at heating coil drains in the fan room and boiler room. * The contractor shall test the system hydrostatically at 100 PSIG for a period of four hours once the secondary cleaning has concluded. **Submittals and Testing:** * The contractor shall submit product data for approval. * The contractor shall submit hot and cold system pressures documented at the start of the project. * The contractor shall perform tests to determine the strength of the glycol and water solution and submit written test results. * The contractor shall provide a written and signed statement to the owner that the procedures have been completed. **Code Compliance:** * The contractor shall comply with all applicable codes, ordinances, regulations, standards, and manufacturer's instructions. * The contractor shall maintain code minimum mechanical service to all areas impacted by the work. **Record Drawings:** * The contractor shall provide accurate project record drawings, showing all changes from the original plans made during the installation of the work. * The contractor shall submit an electronic copy of updated controls shop drawings, including plans, panel wiring diagrams, and sequences of operations, to accurately reflect installed conditions.