61-IFB25033 - Addendum #2.pdf

This is Addendum #2 to Invitation for Bids (IFB) #61-IFB25033 issued by North Carolina Central University for an early procurement package involving one rotary-screw compressor water chiller for the Walker Complex HVAC and BAS Repairs project. The addendum addresses vendor questions regarding design parameters and clarifies that the chiller schedule has been updated to reflect the required 250-ton net cooling capacity with updated entering water temperature (EWT) specifications. The chiller must be delivered to LeRoy T. Walker Physical Education and Recreation Complex at 1450 South Alston Avenue, Durham, North Carolina between February 15, 2027 and March 1, 2027. Bids were due October 7, 2026 at 2:00 PM ET, with written questions required by September 24, 2026. No pre-bid conference or site visit was offered. Award will be made to the responsive bidder submitting the lowest life-cycle cost bid that meets all technical specifications and delivery requirements.

Addendum #2 replaces Appendix B (the Chiller Schedule) with updated specifications reflecting the 250-ton net chiller capacity parameters established in Addendum #1. Vendors must base their bids on the clarified design parameters provided in this addendum, and responses to questions in Addendum #2 supersede any previous responses where applicable. Bid pricing must follow a life-cycle cost analysis basis using Appendix F, incorporating initial cost plus estimated energy usage over 23 years at $0.079 per kilowatt-hour across four load conditions. The chiller must comply with AHRI 550/590, ASHRAE 15, UL 465, ASME Boiler and Pressure Vessel Code, and North Carolina State Building Code Energy Conservation Code, with required features including rotary twin-screw compressors at no more than 3,600 rpm, R-513a refrigerant, plate-fin condensers with integral sub-cooling, BACnet-compatible controller integration, and a four-year extended parts and labor warranty on the refrigeration compressor. Delivery, assembly, and preparation must be included, Free-On-Board Destination, within 140 consecutive calendar days after purchase order receipt.