8d. Memo
Airport Chiller Control Panel Replacement Phase 2
COMMISSION AGENDA MEMORANDUM Item No. 8d ACTION ITEM Date of Meeting January 4, 2022 DATE: December 10, 2021 TO: Stephen P. Metruck, Executive Director FROM: Eileen Francisco, Interim Director, Aviation Facilities & Capital Programs Wayne Grotheer, Director Aviation Project Management Group SUBJECT: Chiller Control Panel Upgrade Project Phase 2 (C801181) Project Approval Amount of this request: $1,258,000 Total estimated project cost: $1,288,000 ACTION REQUESTED Request Commission authorization for the Executive Director to (1) prepare design and construction bid documents for the Chiller Panel Upgrade project phase 2 at Seattle-Tacoma International Airport (STIA), and (2) develop, advertise, and execute a Public Works Building Engineering Systems Contract to replace chiller control panels in the Central Mechanical Plant. The amount of this request is $1,258,000 for a total estimated project cost of $1,288,000. EXECUTIVE SUMMARY The reliable operation of the Central Mechanical Plant (CMP) is essential for passenger comfort and Sea-Tac Airport operations. This project ensures operational integrity of the CMP through the removal and replacement of the integrated control panels for five chiller units in the CMP. The control panels for the five chillers are at the end of their useful life and are no longer manufactured. If the control panels fail, the result is the chiller not being operable, reducing chilling capacity and placing the Airport at risk of loss of essential facility cooling including terminal, tenant, office areas, electrical, data and communication rooms , and all aircraft cooling through the preconditioned air system. This upgrade will replace the integrated control panels at the chiller, as well as any necessary hardware to maintain the existing interfaces to the Building Automation System (BAS) Direct Digital Controls (DDC), and to the chiller starters located remotely in the electrical room. JUSTIFICATION The reliable operation of the CMP is essential for passenger comfort and Sea-Tac Airport operations. This project ensures operational integrity of the CMP through the removal and replacement of the integrated control panels for 5 chiller units in the CMP. If one or more chiller panels fail, the airport chilling capacity will be reduced greatly for the summer season. Template revised January 10, 2019. COMMISSION AGENDA Action Item No. __8d__ Page 2 of 4 Meeting Date: January 4, 2022 Diversity in Contracting Project staff is engaged with Diversity in Contracting and is collaborating on a cohesive plan to establish women and minority owned business enterprise (WMBE) aspirational goals and inclusion plan. DETAILS In the central mechanical plant, replace and upgrade the chiller control panels on chillers 1, 2, 5, 6, and 8 with an updated visual control screen that will match chillers 3, 4, and 7 that were upgraded in phase 1 of this project in 2019 under a separate CIP. The existing chiller control panels are no longer manufactured and if they fail the chillers will not operate and provide cooling to the airport terminal. The chiller control panel interfaces between the chiller, starter, motor, oil system, compressor, and the building automation system to achieve the cooling process required by the airport terminal. The 5 chillers each produce 1500 to 2,100 tons of cooling and together represent 55% of the cooling capacity in the central plant. This upgrade will replace the integrated control panels at each chiller as well as any necessary hardware to maintain the existing interfaces to the building automation system and the chiller starters located remotely in the electrical room. The new control panels will provide an updated visual control screen, more reliability, updated software, and utilize parts that are readily available for future service issues. Scope of Work Replace and upgrade the chiller control panels on chillers 1, 2, 5, 6, and 8. Replace hardware to maintain the existing interfaces to the BAS, and to the chiller starters located remotely in the electrical room. Add conduit, wire, fiber, and programming required to achieve the replacement of the panel and interface to the electrical starters and BAS. Commission each of the 5 chillers at the component, equipment, and then systems level to ensure each chiller operates independently and in concert with the others to achieve the airport terminal cooling requirements. Schedule The proposed schedule is to complete this project in Q3 2022. Activity Design start 2022 Quarter 1 Commission construction authorization 2022 Quarter 1 Construction start 2022 Quarter 2 In-use date 2022 Quarter 3 Template revised June 27, 2019 (Diversity in Contracting). COMMISSION AGENDA Action Item No. __8d__ Page 3 of 4 Meeting Date: January 4, 2022 Cost Breakdown This Request Total Project Design $344,000 $374,000 Construction $871,000 $871,000 Total $1,258,000 $1,288,000 ALTERNATIVES AND IMPLICATIONS CONSIDERED Alternative 1 Do not perform the Chiller Upgrade. Cost Implications: $30,000 of funding gets expensed Pros: (1) None Cons: (1) Project will cost more in the future when infrastructure fails. (2) Infrastructure providing terminal cooling is at risk of failing. This is not the recommended alternative. Alternative 2 Complete the project as proposed. Cost Implications: $1,288,000 Pros: (1) Fastest option for accomplishing the project Cons: (1) None This is the recommended alternative. FINANCIAL IMPLICATIONS Cost Estimate/Authorization Summary Capital Expense Total COST ESTIMATE Original estimate $1,288,000 $0 $1,288,000 AUTHORIZATION Previous authorizations $30,000 0 0 Current request for authorization $1,258,000 0 $1,258,000 Total authorizations, including this request $1,288,000 0 $1,288,000 Remaining amount to be authorized $0 $0 $0 Template revised June 27, 2019 (Diversity in Contracting). COMMISSION AGENDA Action Item No. __8d__ Page 4 of 4 Meeting Date: January 4, 2022 Annual Budget Status and Source of Funds This project, CIP C801181, was included in the 2022-2026 capital budget and plan of finance with a budget of $1,288,000. The funding source will be the Airport Development Fund. Financial Analysis and Summary Project cost for analysis $1,288,000 Business Unit (BU) Terminal Building Effect on business performance NOI after depreciation will increase due to inclusion of (NOI after depreciation) capital (and operating) costs in airline rate base IRR/NPV (if relevant) N/A CPE Impact Less than $.01 in 2023 Future Revenues and Expenses (Total cost of ownership) This project ensures the asset life of the chillers is realized. There is no anticipated increase to Operations and Maintenance costs for this project. ATTACHMENTS TO THIS REQUEST None PREVIOUS COMMISSION ACTIONS OR BRIEFINGS January 2, 2017, Commission approval for C800811 Chiller Panel Upgrade Project Template revised June 27, 2019 (Diversity in Contracting).
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