Tab 16 SIR Att 1 SOW FLO HVAC.pdf

Florence TRACON (FLO) HVAC Renovation December 15, 2022

Florence, South Carolina

FLO TRACON

HVAC Renovation

December 15, 2022

Provide all labor, tools, equipment, materials, clean up, and supervision required for renovating the HVAC system in various areas of the TRACON building. The location of the system is in the Terminal Radar Approach Control Facility (TRACON) at the at the Florence Regional Airport; 2100 Terminal Drive, Florence, SC 29501.

Part I – Section B

Statement of Work

Overall project is the replacement and upgrade of building heating, ventilation and air conditioning (HVAC) systems, to include, but not limited to: general heating and cooling of office and storage spaces; general heating and cooling of TRACON with back-up cooling;

critical cooling with back-up of Equipment Room.

To minimize the impact on building operations and occupants, the work will be done in four

(4) phases. The phases are further broken down into work packages, each involving a separate subsystem or area of the building.

Contractor bid pricing shall match this break down and be arranged as follows:

Base Bid: Equipment Room N+1 Cooling - Work Packages 8-12

Add Alternate 1: Base Building HVAC - Work Packages 1, 3-5, 10*

Add Alternate 2: TRACON Emergency Cooling - Work Package 6

Add Alternate 3: Equipment Room Back-up Cooling - Work Package 7

Add Alternate 4: Duct Cleaning - Work Package 2

Work Packages

Work Package #1

Provision of temporary spot-coolers, three (3) total: 2-ton, self-contained rental units, to include temporary ductwork, electrical power, condensate removal, and minor building modifications to provide back-up cooling to systems being renovated. Temporary air conditioning shall be tested for being complete, functional, and reliable prior to permanent interruption of existing system.

Work Package #2

Clean all ductwork in accordance with National Air Duct Cleaners Association (NADCA) Standard, 2021 Edition. Make temporary duct openings as needed to perform cleaning, or use openings made in conjunction with Work Package #3 below. Stop work immediately and report to COR any apparent damage to internal duct liner.

Work Package #3

Modify ductwork, to include selective demolition and addition of new, in office spaces, Break Room and TRACON, to accommodate new variable air volume (VAV) terminal units and air distribution. Replace existing pressure-dependent volume control dampers with pressure-independent VAV units. Work shall include ductwork transitions, sheet metal repairs, insulation, air devices, flexible connectors, hangers and DDC controls with front-end control station. Remove existing ceiling to access ductwork being selectively demolished, modified, or cleaned; and restore same to match surrounding, to include protection of salvaged tiles and replacement of damaged with available attic stock. Seal all new ductwork and inform COR of existing ductwork leaking air at normal operating condition. Make temporary connections between existing and new ductwork to permit use of existing roof-top units as needed.

Work Package #4

Replace the existing roof-top air handling unit with ACU-1: a new 7.5 ton, heat pump with auxiliary electric heat, variable-air-volume (VAV) control, outdoor air economizer, DDC native BACnet control interface, electrical power feed and disconnect, enhanced corrosion protection, and extended 5-year warranty covering both parts and labor. Provide and install new roof curb in coordination with roof replacement. Secure new unit to roof in accordance with code mandated wind loading. Provide transient voltage surge suppression on remote condenser power supply in accordance with FAA standards.

Remove existing unit off-site, to include refrigerant recovery, handling, transportation, and disposal. Removal and installation of replacement requires use of a crane, to include qualified operator, rigging, and transportation. Coordinate with Facility Manager for on-site storage of new unit during interim between delivery and setting.

Work Package #5

Change out building HVAC controls from analog to Direct Digital Control (DDC), native BACnet protocol, with local area network (LAN) communication. Includes new HVAC equipment control hardware, control panel, low-voltage control devices, low-voltage wiring and power supply, FAA approved open-protocol building automation system software, front-end user interface computer workstation, software, licensing, system programing, and owner/user training.

Work Package #6

Provide and install a redundant cooling-only, air handling unit, ACU-2: a new 2-ton split system, constant volume air handler with remote condenser, dedicated to the TRACON for back-up cooling. New unit shall be provided with and extended 5-year warranty covering both labor and parts. Equip unit with stand-alone thermostat control, manually adjusted.

Work shall include selective demolition of existing RTU-2 and covering the roof opening with an insulated load-bearing cap in coordination with roof replacement. Safe existing unit electrical feed and cap all roof penetrations or re-purpose for new unit. ACU-2 remote condenser shall be mounted on top of new roof cap, secured in accordance with code mandated wind loading. Provide and install electrical power feed to and between respective units per manufacturer’s instructions. Provide transient voltage surge suppression on outdoor unit power supply in accordance with FAA standards.

Work Package #7

Provide and install a back-up cooling-only, air conditioning unit, ACU-3: new 3.5-ton self-contained wall-hung system, constant volume air handler, dedicated to Equipment Room.

ACU-3 shall be equipped with factory options for corrosion protection and low-ambient control. Unit shall be provided with and extended 5-year warranty covering both labor and parts. Unit shall be equipped with factory-standard stand-alone control. Provide and install needed wall openings, weather flashing and support, and electrical power feed with disconnect.

Work Package #8

Replace existing critical cooling unit CRAC-1 with ACU-4: new 5-ton, up-flow, self-contained condensing units with remote condenser, auxiliary electric re-heat and humidifier, stepped capacity control, DDC native BACnet control interface, and extended 5-year warranty covering both labor and parts. Exterior condensing unit shall be equipped with corrosion protection. Provide and install separate electrical power feeds with disconnects for both indoor and outdoor units. Provide transient voltage surge suppression on remote condenser power supply in accordance with FAA standards. Install both inside and outside units in same location as existing, with the exception that new indoor units will stand on top of raised floor, and blow air out top of unit through factory-optional plenum box. Installation includes all new refrigerant line sets, make-up water piping, auxiliary water containment pan with alarm, and condensate removal.

Work Package #9

Replace existing critical cooling unit CRAC-2 with ACU-5: new 5-ton, up-flow, self-contained condensing units with remote condenser, auxiliary electric re-heat and humidifier, stepped capacity control, DDC native BACnet control interface, and extended 5-year warranty covering both labor and parts. Exterior condensing unit shall be equipped with corrosion protection. Provide and install separate electrical power feeds with electrical disconnects for both indoor and outdoor units. Install both inside and outside units in same location as existing, with the exception that the new indoor unit will stand on top of raised floor, and blow air out top of unit through factory optional plenum box. Work shall include all new refrigerant and make-up water piping, auxiliary water containment pan with alarm, and condensate removal.

Work Package #10

Provide and install additional exhaust air fans for janitor closet and kitchen break area, and passive cooling ventilation fan for Equipment Room closet: EF-3, 4 and 5. Work shall include ancillary components as needed for a complete and fully functional air exhaust and ventilation system. Provide and install new metal exhaust ductwork using flex, snap lock, spiral, or combination thereof, complete with hangers, and air devices. Insulate kitchen range-hood exhaust. All exhaust ducts shall be sealed. Coordinate size and mounting of new kitchen range hood, EF-4, with existing break-room cabinet. Provide and install roof exhaust cap for EF-4 termination. Provide and install new air transfer grilles in doors of Janitor and Recorder Playback closets.

*Note: of the three (3) fans in Work Package 10, the passive cooling fan for the Recorder

Playback closet shall be installed in Phase 2, and the others in Phase 4 (overall office ductwork modifications).

Work Package #11

Addition of surge and lightning protection of new HVAC roof-top equipment.

Work Package #12

Rough-in a new water supply to Equipment Room ACU-4 and 5 humidifiers, in double-containment piping for protection of room electronics. Provide and install a commercially available, prefabricated double-containment piping product as a system, specifically manufactured by an established company in the market for a minimum of five (5) years.

Include the safe capping of existing water line beneath floor of Equipment Room and installing a new freeze-proof hose bib and water supply to replace that abandoned with existing water make-up line.

Duct Cleaning

Clean existing ductwork remaining in place after demolition of ductwork to be removed per NADCA Standard: 2021 Edition.

General

All phases of project shall include respective turn-over of new systems for beneficial use, to include commissioning, provision of O&M documents and training of local Facility Management prior to start of warranty periods.

All work shall comply with current codes and standards in effect, and operational requests of local Facility Management. Comply with all local, state and federal permitting and code compliance in effect and known prior to beginning work.

Construction shall be scheduled for winter, early spring, or late fall seasons. Construction duration and working hours shall be coordinated to allow for occasional adverse weather, holidays, and air traffic interruptions. Normal business working hours shall be Monday through Friday, 07:00 – 16:00. Non-business working hours shall be 22:00 – 06:00. Work that may interrupt building operations shall be performed during non-business working hours.

As basis of bid, assume ADD ALTERNATE 2 and 3 (work in the TRACON and Office Spaces) shall be performed during non-business hours.

HVAC work on the roof should be coordinated and performed in conjunction with a new roof replacement (separate project).

All electrical work shall meet FAA requirements including using copper wire, bolt-in breakers, and other requirements.

Filing FAA Form 7460-1, Notice of Proposed Construction or Alteration, if a crane or other construction equipment is used during the AC Unit replacement project. A NOTAM will need to be issued during removal and replacement of the AC units.

Patch and seal roof upon removal of existing air conditioning equipment and placement of new. Coordinate with the roof warranty holder to determine allowances so as not void roof warranty.

Properly ground the new units to the existing lightning protection system per NEC and FAA STD 019f.

Installed equipment shall meet all current seismic requirements.

Upon completion of work, notify Contracting Officer’s Representative (COR) that entire system, including the newly supplied equipment and the reconnected existing equipment, can be inspected for acceptance and turn-over. Upon acceptance, begin 1-year workmanship warranty and 5-year extended warranty on new equipment. The warranty shall be a no-dollar-limit guarantee.

Code requirements and permits

Perform all work in accordance with applicable state and local statutes, ordinances, codes in force during time of construction period, and any regulations of governmental authorities having jurisdiction. Obtain and pay for all permits and inspections. The current issues of mandated Codes and Standards are listed on drawing FLO-E-21000450-G004

Bid Schedule

Base Bid - Equipment Room N+1 Cooling Work Package #8 $__________________ Work Package #9 $__________________ Work Package #10 * $__________________ Work Package #11 $__________________ Work Package #12 $__________________

Add Alternate 1 - Base Building HVAC

Work Package #1 $__________________ Work Package #3 $__________________ Work Package #4 $__________________ Work Package #5 $__________________ Work Package #10 * $__________________

Add Alternate 2 - TRACON Emergency Cooling

Work Package #6 $__________________

Add Alternate 3 - Equipment Room Back-up Cooling Work Package #7 $__________________

Add Alternate 4 - Duct Cleaning

Work Package #2 $__________________

Total Cost $__________________