Z2DA--657A5-25-101, Replace Chiller #1

be noted that all physical replacement work within and without the plant shall be limited to the window of October 15th to March 15th with the remainder of the POP intended to serve as a time for as-built generation and project closeout. All contract work shall be completed within this timeframe. The site location is Building 49 of the Marion VA Medical Center Campus in Marion, Illinois. Background The Marion VA Medical Center has identified the need to replace chiller #1 in its campus chiller plant. To meet this need, a new chiller unit is to be provided and installed in place of the old unit. Requirements Basis of Proposal: The contractor s proposal shall be based on this SOW and the project drawings and specifications included. It is the intent of these documents to outline the scope and requirements of the Replace Chiller #1 Project. Performance and Payment Bonds: Performance and/or Payment Bonds are required. Insurance: Standard general liability and builder s risk coverage is required until work is complete. Wage Rates: Davis Bacon and prevailing wage rates and certified payroll are excluded for manufacture, delivery, and incidental work relating to installation. Davis Bacon and prevailing wage rates and certified payroll applies to only non-incidental work performed on site. The contractor shall be responsible for coordinating all equipment provided and work performed with the requirements of all applicable codes, including but not necessarily limited to: 29 CFR 1910, OSHA International Mechanical Code (latest approved edition). International Plumbing Code (latest approved edition). NFPA 70, National Electric Code (latest approved edition). H-18-8, VA Seismic Design Handbook. ASCE/SEI 7, Minimum Design Loads and Associated Criteria for Buildings and Other Structures PG-18-3, VA Design and Construction Procedures. 2 PG-18-10, VA Design Manual for HVAC Systems. PG-18-10, VA Design Manual for Electrical Systems. Seismic Design Criteria: Refer to Section 13 05 41 of the Project Specifications. Shop Drawing Submittals: The following is a (not-all-inclusive) list of submittals which require submittal to and approval by the Marion VAMC prior to work beginning. Please see Section 01 33 23 of the Project Specifications for more information. All equipment and materials provided for use on this project by the contractor shall be subject to the approval of the VAMC Engineering Service prior to purchasing. The Government shall not be responsible for the cost of any equipment or materials purchased without said approval. A certified engineering plan for seismic anchorage, bracing and vibration isolation of all new equipment and systems. See Sections 13 05 41 & 23 05 41 for more information. A certified engineering plan detailing the measures and modifications necessary (both temporary and permanent) to the existing exterior masonry wall to facilitate the project work. Refer to the Project Drawings for more information. Required documents for system commissioning by the commissioning agent. See Section 23 08 00 for more information. Demolition: The contractor shall open the existing exterior masonry wall as indicated to facilitate the removal of the components to be demolished. This step involves engineering design which is delegated to the contractor to undertake. Refer to the Project Drawings for more information on delegated design activities. The contractor shall ensure that all electrical, water and control lines to the existing chiller are deactivated or valved off and locked out prior to demolition activities. The contractor shall further ensure that the deactivation of service to the existing chiller will (in no way) cause any disruption to the outgoing chilled water service from the plant or interference with any other chiller plant system or operation. Existing chiller #1 shall be disconnected: All piping connections from the chiller to the existing chilled water distribution system and the cooling tower loops shall be undone. Undersized piping connections between the existing chiller condenser side and the cooling tower shall be removed. All electrical connections from the chiller to the existing power distribution and chiller control systems to the chiller shall be undone. All piping and conduit connections shall be cut back to a point necessary to facilitate removal of the existing chiller. Existing chiller #1 shall be removed from Building 49: a. Once decoupled from all required systems the chiller unit shall be moved out of the building through the demolished portion of the existing exterior wall. Existing chiller #1 shall be disposed of: a. The chiller unit shall be taken off-site and disposed of in accordance with all applicable Federal, State and Local regulations. Copies of all records of salvage and refrigerant disposal shall be turned over to the VAMC. Installation: Contractor shall furnish a new chiller unit with the following mandatory attributes: It shall fully comply with Section 23 64 00 of the Project Specifications. It shall fit within the space left vacant by the removal of the existing chiller. This requirement shall include observance of all required maintenance and operating clearances. The new chiller unit shall meet the requirements set forth within the New Water-Cooled Chiller Schedule (located on Sheet MH-100 of the Project Drawings) and Specification Section 23 64 00. Its condenser/cooling tower loop plumbing shall be upgraded as indicated within theProject Drawings. It shall be compatible with the existing plant control system. Its operation shall be fully automated through integration into the existing controls with no loss of features or functionality. The contractor shall be responsible for the following; Field verification of existing plant control components as well as the current system sequence of operations to the extent necessary to complete the items below. Coordination of the new chiller unit s control needs as they relate to the existing system configuration and capability. Resolution of any differences uncovered in the previous items as well as determination of all corrective equipment and programming modifications required. Furnishing and installation of all new components deemed necessary in the previous items. Furnishing all programming and reprogramming deemed necessary in the previous items. It shall be capable of functioning off of the existing electrical service with as little modification as possible. If the chiller unit chosen for use by the contractor requires the modification of existing electrical components or features, the cost of those modifications shall be considered in the contractor s scope of work. The existing electrical service parameters are as follows; The voltage/phase/frequency is 480/3/60, respectively. The chiller is currently fed through an existing 600 volt / 800 amp rated disconnect panel. Relocation of the existing disconnect panel to address any planform shape differences or final clearance issues with the new chiller shall be considered in the contractor s scope of work. The contractor shall install a new overhead (roll-up) door system and relocate the existing man-door in the modified exterior wall as indicated in the Project Drawings. This shall also include all infilling and refinishing of the exterior wall as needed to return it to its pre- construction condition. This step involv