1-1 - OVERVIEW - CPA Chiller Plant Update.pdf

1 – Overview – Construction Page 1 of 3 Form rev. 03/2024

1 – Project Overview for GC

Project Description Pursuant to Chapter 2269 Subchapter D of the Texas Government Code, Williamson County (County) is seeking written proposals from qualified contractors to provide Competitive Sealed Proposals for Cedar Park Annex (CPA) Chiller Plant Update. County intends to utilize the one-step selection process for this solicitation and award.

Project consists of a one-for-one replacement of major mechanical equipment serving the facility’s hot water and chilled water systems, along with replacement of a roof-mounted outside air unit. The Contractor shall furnish all labor, materials, equipment, supervision, coordination, and services necessary to deliver a complete, fully functional, and code-compliant project.

The Project includes all utilities, piping, insulation, controls, structural supports, housekeeping pads, and appurtenances required for proper installation and operation of the systems described herein.

Architect of Record County has contracted with O’Connell Robertson & Associates, Inc. for Architectural/ Engineering services for this project.

Scope of Services The County intends to undertake the CPA Chiller Plant Update Project, which consists of a one-for-one replacement of major mechanical equipment serving the facility’s hot water and chilled water systems. The Project includes all associated utilities and appurtenances necessary to deliver a complete and fully operational system.

The scope of work includes, but is not limited to, the removal and replacement of existing hot water and chilled water pumps and bases; expansion tanks; filter/pot feeders; air separators;

automatic air vents; butterfly, check, and isolation valves; piping and insulation within the pump room; and construction of housekeeping pads with new concrete inertia bases. The Project also includes replacement and integration of all related Building Automation System (BAS) temperature, pressure, and differential pressure sensors, piping from isolation valves to the new pumps, and updates to the central plant control sequence.

In addition, the Project includes a one-for-one replacement of an existing 6,600 CFM roof-mounted energy recovery outside air unit with a new unit equipped with total and sensible energy recovery wheels, chilled water cooling coil, and hot water heating coil. The existing roof curb is anticipated to remain in place, with the new unit designed to fit the existing curb or utilize a curb adapter as required. All unit controls shall be replaced and integrated with the BAS.

The Contractor shall provide all labor, materials, equipment, coordination, and services required to complete the Project in accordance with the Contract Documents, and applicable codes.

1 – Overview – Construction Page 2 of 3

Substantial Completion

180 days after Notice to Proceed (NTP) *

*Suggested Project Timeline

Submittals and Shop Drawings Approved – Target: Within 30–45 calendar days of NTP Includes:

• Mechanical equipment submittals (pumps, expansion tanks, ERV unit)

• BAS points list and sequences

• Controls shop drawings and integration plan

Major Equipment Procurement Complete - Target: Within 75–90 calendar days of NTP Includes:

• Pumps and hydronic components released for fabrication

• Roof-mounted outside air unit released for manufacture

Pump Room Demolition and Prep Complete - Target: Within 105–120 calendar days of NTP Includes:

• Removal of existing pumps and accessories

• Housekeeping pads and inertia bases installed and cured

• Valves installed and ready for equipment setting

Equipment Installation Complete - Target: Within 135–150 calendar days of NTP Includes:

• Hot water and chilled water pumps set and piped

• Outside air unit set on existing curb or curb adapter

• Piping, insulation, and mechanical connections complete

BAS Installation and Controls Integration Complete –

Target: Within 155–165 calendar days of NTP Includes:

Sensors installed and wired

• Control sequences updated

• Graphics and alarms configured

1 – Overview – Construction Page 3 of 3

Testing, Adjusting, and Balancing (TAB) Complete –

Target: Within 165–175 calendar days of NTP Includes:

• Hydronic system balancing

• Functional performance testing

• TAB reports submitted

Substantial Completion - Target: Within 180 calendar days of NTP Includes:

• Systems operational and usable for intended purpose

• Punch list initiated

Final Completion - Target: Within 210 calendar days of NTP Includes:

• Punch list complete

• As-builts, O&M manuals, warranties submitted

• Final acceptance by the County

Construction Budget $ 810,000.00

MANDATORY Pre-Solicitation Conference & Site Walk Thursday, April 9, 2026, at 10:00AM Cedar Park Annex

350 Discovery Blvd, Suite 104

Cedar Park, TX 78613

*Both Pre-Solicitation Conference & Site Walk must be attended.

1 – Project Overview for GC