Coconino County Ionwave #2026-06 Addendum 2

Coconino County Health and Human Services Building Chiller System Replacement

Coconino County is seeking bids for a comprehensive HVAC chiller system replacement at the Health and Human Services building in Flagstaff, AZ. - Government Buyer: - Coconino County Health and Human Services - Coconino County Facilities Management Department - Purchasing Office - OEMs and Vendors: - Emcor Services (required for controls integration) - Products Requested: - Air-cooled chiller (1 unit) - Part number: CH-1 (specified in plans) - Glycol scroll chiller with integrated variable frequency drive (VFD) - Distribution pumps (2 units) - Part numbers: P-3, P-4 - Sized for N+1 redundancy, integral VFDs and controls - Glycol makeup unit (1 unit) - Part number: GMU-1 - Standalone unit with BMS integration - Expansion tank (1 unit) - Part number: ET-1 - Air separator (1 unit) - Part number: AS-1 - Sump pump (1 unit) - Part number: SP-1 - Heating water coil for second floor air handler (1 unit) - Replacement of hot water coil in AHU-2 - Chilled-glycol water system fill and flush (approx. 800 gallons) - Temporary chiller connection installation (4 hydronic mains with isolation valves and blind flanges) - Services Requested: - Turnkey installation of HVAC chiller system (removal, installation, startup, owner training, site cleanup) - Subcontracting with Emcor Services for controls integration - Testing, adjusting, and balancing (TAB) services (certified by AABC or NEBB) - Demolition and installation services - Unique/Notable Requirements: - Arizona-licensed general contractors with commercial HVAC experience - Integration with existing building control systems - Installation of connections for future temporary chiller - Full replacement of hot water coil for longer unit life - Compliance with 2018 International Mechanical Code and all relevant state/local codes - Certified TAB report required - All costs for testing, inspections, and code compliance included - Mandatory pre-bid conference - Submission of bid bond and performance/payment bonds - Project planned for fall to minimize disruption - Fill and flush of glycol system (approx. 800 gallons)

Description

Coconino County is soliciting sealed bids for the replacement of the chiller system at the Health and Human Services Building located at 2625 N. King Street, Flagstaff, AZ. The project includes replacing the hot water heating coil, demolishing the existing electric air-cooled chiller and pumps, and modifying the chilled water system to a glycol loop system with new equipment. A mandatory pre-bid conference is scheduled for April 21, 2026, and bids are due by May 6, 2026. The awarded contract includes requirements for testing, adjusting, and balancing, and compliance with various building and mechanical codes.

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