HVAC Repair by Replacement - 147th MSG

Amendment 00001 Is temporary cooling required? There will be a temporary chiller, coordination when this needs to be removed for the permanent will need to be coordinated with CE. Is new electrical conductors required from the disconnect to the new unit.? Contractor to see SOW section 3 and 5. Is flexible weather resistant conduit approved for any electrical work need to be performed for the chiller replacement? All installs shall be per NEC and Local Code. The contractor shall submit the proposed raceway type and intended installation location for Government review before installation. Is a new wye strainer going to be required to prevent partials from the existing system from entering the new chiller? The contractor shall field verify whether a serviceable strainer is already installed upstream of the chiller and confirm the replacement chiller manufacturer’s filtration requirements. Is a new check valve going to be required at the new chiller? The contractor shall verify the existing piping arrangement and the manufacturer’s requirements for the dual VFD pump package. A check valve shall be provided if required to: Prevent reverse flow through the chiller Protect the integral pump package Prevent flow through an inactive chiller Maintain proper system hydraulic operation Comply with the manufacturer’s installation diagram If a new check valve is necessary, the contractor shall submit the proposed valve type, size, location, pressure rating, and pressure-drop information for Government review and written authorization.