Scope of Work for the CID ASR HVAC Replacement Project at the Eastern Iowa Airport.pdf

SCOPE OF WORK

CID ASR HVAC Replacement Project At the Eastern Iowa Airport in

Cedar Rapids, IA

PREPARED BY: AJW-2C15D

INFRASTRUCTURE SUPPORT

PART 1 - INTRODUCTION

1.1 SUMMARY

A. The current HVAC system supporting the CID ASR facility is composed of 3 aging – 12.5 ton packaged units with an unreliable control system. We will be replacing the existing system with 2 – 20 ton packaged units to better suit the needs of the facility. Adequate temporary cooling must be established within the facility before any demolition may occur. The Contractor must submit a written plan detailing the methods, equipment, points of connection, etc. that will be utilized to provide an operational air conditioning system at all times and adhere to the sequence of work proposed for removal and replacement of the HVAC unit.

The following specifications constitute the working portion of the contract between the Contractor and the Federal Aviation Administration, an Agency of the Federal Government. The Contracting Officer (CO) assigned to this contract must be the only individual with authority to speak for and contractually bind the FAA. All communications, authorizations, approvals, changes, modifications, etc. involving this contract must be with and through the CO. Any action not approved by the CO must not bind the FAA.

The CO may assign a Contracting Officers Representative (COR) to oversee the work on the project and act as a technical point of contact. A letter dating the COR's responsibilities and authority will be issued when a COR is assigned.

1.2 PROJECT LOCATION

A. The project is located at the Eastern Iowa Airport (CID) ASR-9 building located at 2121 Arthur Collins Pkwy SW, Cedar Rapids, IA 52404.

1.3 PROJECT DESCRIPTION

A. Establish a redundant, reliable method of temporary cooling to be used to maintain full operation of the CID ASR facility during construction. Facility must be capable of maintaining a constant temperature between 65-75F on temporary units before demolition may occur.

B. Remove three (3) existing packaged HVAC units serving the ASR shelter, external ductwork, two (2) existing through wall type HVAC units serving the PCS shelter, and all associated equipment such as conduit, conductors, grounds, controls, disconnects, etc. Contractor must recover and dispose of any and all existing refrigerants by a certified technician as required by 40 CFR part 82 subpart F, EPA section 608 Refrigerant Recovery, Reclaim, Recycle program.

C. Place and finish two (2) concrete pad expansions in between existing ACU pads to accommodate the new units. Contractor must match depth and height of existing foundation. Attach new foundation to old foundation with rebar dowels. Utilize #4 rebar with 12” O.C. spacing. All concrete must develop a minimum compressive strength of 3000 PSI.

D. Furnish and install two (2) new 20 ton (240K btu/hr) packaged HVAC units per drawing M002 and new exterior ductwork to integrate into the existing building air supply and return locations and dimensions. Contractor is to utilize the existing exterior ductwork support/foundation to the best of their ability; discard what is not used and backfill with like gravel. Contractor must propose a plan to be approved for the new exterior ductwork. Bond new units to existing facility EES per FAA STD-019F. All anchor bolts, nuts, and washers must be hot dip galvanized per ASTM A153 and A354. Insulate all new ductwork according to drawing M001 and bond all non-electrically continuous sections to each other with 2-hole lugs and #6 wire.

E. Furnish and install two (2) appropriately rated backdraft dampers, one for each unit, per drawing M002.

F. Furnish and install two (2) new heavy duty NEMA 3R rated fused safety switches with two (2) sets of appropriately rated fuses for the new HVAC units per FAA STD-1217G.

G. Furnish and install individual, programmable thermostats for each new unit at a location agreed upon by the RE and SSC to maximize the accuracy of the reading.

H. Contractor must clean the existing interior ductwork per NADCA standards, repair any damaged insulation found during the cleaning, replace each existing register with new, and replace each volume damper with a lockable volume damper.

I. Contractor must perform a full test and balancing of the new system before commissioning is to occur. Report results in writing.

J. Furnish and install two (2) new 3 ton (35K btu/hr) through wall packaged HVAC units per drawing M003 in the PCS building. Contractor must sequence construction so that one unit may remain operational during the other’s demolition and construction or establish temporary cooling so that the building maintains full operational capability. Coordinate which unit is replaced first with COR and SSC.

K. Furnish and install two (2) new heavy duty NEMA 1 rated fused safety switches with two (2) sets of appropriately rated fuses for the new through wall HVAC units per FAA STD-1217G.

L. Engage a factory-authorized service representative to inspect, test, and adjust field assembled components and equipment installation for all new HVAC units. Report results in writing

M. Submit a draft workplan to the FAA for review and approval. The workplan must describe the methods, procedures, and strategies to complete each task. The FAA will require 2 weeks for review and comment. FAA will provide comments to the contractor for incorporation into the final workplan. The contractor must then submit the final workplan to the FAA for approval.

1. The workplan must include but is not limited to the following:

a. Work schedule including forecasted times and any facility impact.

b. Contractor onsite personnel.

c. Procedures and methods of completing tasks.

d. Equipment and material storage requirements.

e. Power requirements.

PART 2 - GENERAL SPECIFICATIONS

2.1 This is an operating FAA facility whose functions cannot be compromised during performance of the work. The work must be accomplished in such a manner as to minimize the impact on the facility operation.

2.2 A preconstruction conference will be held prior to the start of construction. At this time, requirements for working on the ASR with regards to safety, site access, etc. will be discussed.

2.3 Precautions must be taken prior to and during installation to protect the site from damage. Prior to commencing work, the Contractor must coordinate and follow with the facility a strict safety protocol for Interim Measures for full or partial outages of any operational equipment or system affected by this work. The Contractor must remove the existing HVAC units and associated equipment. All work must conform to Cedar Rapids SSC rules, regulations and specifications.

2.4 Use appropriate containment methods and remove/recover existing refrigerant from the site.

Contractor is responsible for the appropriate recovery/reclamation of any and all existing refrigerants by a certified technician as required by 40 CFR part 82 subpart F, EPA Section 608, Refrigerant,. Recovery, Reclaim, Recycle program.

2.5 The Contractor must comply with OSHA Standards 29 CFR 1910 (Occupational Safety and Health Standards) and 29 CFR 1926 (Safety and Health Regulations for Construction). Contractor to comply with FAA Standards FAA STD-019F and FAA STD-1217G. The Contractor must keep all work areas clear of slipping and tripping hazards.

2.6 Upon completion of the installation, the Contractor must clean the work area and remove debris to the satisfaction of the COR. Contractor is responsible for the disposal of the demolished HVAC unit and associated equipment. Contractor to provide any required manifest for disposal of existing material and any contaminated refuse.

2.7 The Contractor must maintain at the site, a competent superintendent at all times and during all phases of the work covered under this project for which Contractor or Subcontractor personnel are at the site. Such person must serve as the contact between the FAA and the Contractor for all field communications and must have authority/responsibility for the Contractor’s decisions and for enacting Government directions regarding the field activities.

2.8 Samples, certificates, and shop drawings must be submitted as required in subsequent specification sections. All materials installed in the work must match the approved submittals.

No substitutions will be allowed without written approval by the Contracting Officer.

2.9 It is recommended that the Contractor perform a field inspection of the site prior to bid submission in order to be informed of the specific working conditions applicable at the site and to ascertain the correct types/amounts of work to be performed. If the bidder chooses not to visit the site, he will nevertheless be charged with knowledge of conditions which a reasonable inspection would have disclosed. Advance notice for inspections is required. All site visits must be coordinated 48 hours in advance. There must be no adjustment to the contract price after the bid opening for items, or regarding matters, which could be readily discerned during such a site visit. It is the Contractor’s responsibility to field verify all unit sizes and specifications prior to submittals, ordering or replacement of the any new equipment.

2.10 At least seven days prior to the planned start of work; the Contractor must submit a detailed work schedule in writing to the CO for approval and coordination. Replacement of the existing HVAC units must not commence until the Contractor has received written approval from the FAA for the date and time for the replacement. Working hours may be altered upon agreement with the COR and the FAA on a case by case basis. Work not affecting the air traffic control or the air traffic operations may be conducted at other hours as agreed upon by the COR and the FAA.

2.11 The Contractor will not be issued keys to the facilities. The Contractor must not start any work or move any equipment, supplies, or materials onto the site until the COR has been notified and is on site.

2.12 The Contractor must coordinate material delivery with the COR. Materials must be delivered in their original, unopened containers, clearly labeled with the manufacturer's name, brand name, and such identifying numbers as appropriate. Materials must be stored within temperature ranges and under the conditions recommended by the manufacturer. Materials subject to moisture damage must be stored off the ground and covered. Material damaged in handling, storage, construction traffic, etc. will be rejected.

2.13 Work and storage space is limited at the site. The Contractor must confine the movement and storage of vehicles, equipment, and materials to such routes, times, and locations, as may be designated by the COR. The Contractor must take all precautions necessary to protect the existing facilities, equipment, buildings, vegetation, etc. during the contract. Any areas/material damaged by the Contractor, his employees, or any subcontractors must be repaired/replaced by the Contractor at no additional cost to the Government. Repairs must be approved by the COR and must match the original. The Contractor must provide all temporary covers, enclosures, etc.

required to protect the existing facilities.

2.14 When the on-site work begins to replace the existing HVAC units, THE WORK MUST PROCEED WITHOUT DELAY. If the work needs to be suspended, the Contractor must provide a barricade or temporary covers, as required, to protect personnel and the work site.

2.15 The contractor must not de-energize FAA equipment, only FAA personnel. The contractor must coordinate any power outages with the RE and SSC and require a 72 hour notice.

2.16 The contractor must participate in a Contractor Acceptance Inspection with the FAA following the completion of the project.

2.17 The Contractor must remove all debris resulting from his work from the premises at the site and dispose of properly on a daily basis, or as directed by the COR. Also, a final cleanup must be conducted when the work is complete.

2.18 Power required for the construction work will be made available to the Contractor at no cost. The Contractor, at his expense, must provide all temporary connections, fittings, etc. from the source of supply to the point of use. Arrangements for use of these facilities must be coordinated with the COR and SSC.

2.19 The Contractor must acquire all required permits, fees, and certificates before starting work.

PART 3 - GENERAL HVAC DOCUMENTATION

3.1 RELATED DOCUMENTS

A. Contract Documents to include Conditions and Drawings.

3.2 SUBMITTALS

A. Product Information: Include rated capacities, shipping, operating weights and accessories for each model indicated on the schedule.

B. Shop Drawings: Provide detail on equipment assemblies and indicate dimensions, required clearances, components, and location and size of field connections.

1. Wiring Diagrams: Show detail wiring for power, signal, and control systems and differentiate between factory and field wiring.

3.3 CONTRACT CLOSEOUT SUBMITTALS

A. Manufacturer’s Field Startup and Test Reports

B. Test and Balance report

C. Operation and Maintenance Data

3.4 QUALITY ASSURANCE

A. Engage a factory certified startup technician to confirm proper construction of the units per factory specifications.

3.5 DELIVERY, STORAGE AND PROTECTION

A. Protect HVAC units from damage by leaving factory inspection openings and shipping packaging in place until final installation.

B. If stored outside prior to final installation, HVAC units must be protected from the elements and ground water with tarps and blocking as needed.

3.6 WARRANTY

A. General Warranty: HVAC units must be warranted against defects in workmanship and materials for 12 months after an agreed-upon start date.

PART 4 - PRODUCTS

4.1 MANUFACTURER

A. The design for the ASR HVAC portion of this package is based off of the following Carrier WeatherMaster unit.

1. Carrier WeatherMaster 50HCBG24AFM5-0A5G0

a. Two (2) 240K btu/hr (20 ton) packaged outdoor HVAC units

2. Any model different than the above must be reviewed and approved as equal

B. The design for the PCS HVAC portion of this package is based off of the following Marvair Compac 1 unit.

1. Marvair Compac 1 AVP36ACA05-N

a. Two (2) 35K but/hr (3 ton) through wall HVAC

2. Any model different than the above must be reviewed and approved as equal

4.2 HVAC SPECIFICATIONS

A. Description: The HVAC system must be constructed and assembled completely ready for field connections to the electrical power supply.

1. The ASR HVAC system must consist of two (2) 20-ton packaged units with horizontal discharge along with the following options:

a. Hail guards

b. Factory-installed low ambient kit

c. Factory-installed return air smoke detector kit

d. Low electric heat option, no less than 18kW

e. Powered convenience outlets

f. Units must meet or exceed 11.3 EER

2. The PCS HVAC system must consist of two (2) 3-ton packaged through wall units along with the following options:

a. Hard start kit

b. Extreme duty package

c. 5kW electric heat option

d. Units must meet or exceed 10 SEER

PART 5 - EXECUTION – TASKS TO BE COMPLETED

5.1 Remove and dispose of existing ASR and PCS shelter HVAC systems and all peripheral equipment as required by FAA guidelines. Use appropriate containment methods and remove existing refrigerant from the site. Contractor is responsible for the appropriate recovery/reclamation of any and all existing refrigerants by a certified technician as required by 40 CFR part 82 subpart F, EPA Section 608 Refrigerant, Recovery, Reclaim, Recycle program.

1. The rooms must be conditioned at all operational hours during installation, preferably with a temporary cooling system. It is the contractor’s duty to determine the means and methods for this installation while maintaining operational cooling.

5.2 Contractor must place concrete pad extensions in between existing concrete equipment pads per drawing C002. Contractor must match existing depth and construction methods of the existing pads. New concrete must be reinforced with #4 rebar and reach a compressive strength of 3000psi within 28 days.

5.3 Install two (2) new 20 ton packaged HVAC units AHU-1 and AHU-2 with new mainline fused disconnects in NEMA 3R rated enclosures. Provide factory hail guards, low ambient kit, low heat option, return air smoke detector option and powered convenience outlets. Provide new conduit, conductors, breakers, and equipment ground to existing earth electrode system per FAA-STD - 019F. Install according to FAA-STD-1217G.

5.4 Install two (2) new 3 ton through wall HVAC units HVAC #1 and HVAC #2 with new mainline fused disconnects in NEMA 1 rated enclosures. Provide factory hard start kit, 5kW electric heat, and extreme duty package. Provide new conduit, conductors, breakers, and install according to

FAA-STD-1217G

5.5 Install and insulate ductwork in accordance to drawing M004. Apply waterproof sealant to all exterior HVAC ductwork joints. All exterior ductwork joints, insulation joints, and insulation must be waterproof. The Contractor must provide product data and shop drawings of the sealant, insulation, and insulation installation method to the FAA for approval.

5.6 Install appropriately rated mechanical backdraft dampers within the supply and return air ducts at the outlets of AHU-1 and AHU-2 (prior to the main branch). The most current version of the SMACNA standard for HVAC Duct Construction Standards must be utilized when constructing the back draft dampers. The Contractor must provide the FAA with product data and shop drawings of the proposed back draft damper installation for approval.

5.7 Install two (2) 18” x 18” insulated duct access doors near back draft dampers. The most current version of the SMACNA standard for HVAC Duct Construction Standards must be utilized when constructing all duct access/service doors. The Contractor must provide the FAA with product data and shop drawings of the proposed access/service doors installation for approval.

5.8 Install two (2) new heavy duty NEMA 3R rated fused safety switches with two (2) sets of appropriately rated fuses for the new HVAC units per FAA STD-1217G. Use number two (#2) wire with number 8 ground in 1.25" rigid conduits. Wire to be THHN 75C rating or higher.

5.9 Provide the FAA with product data and shop drawings of the proposed interface between the new exterior duct insulation and the exterior wall of the building. The connection must be UV protected, weatherproof and waterproof.

5.10 Balance the new ASR shelter HVAC system at the completion of this project. The most current version of the SMACNA HVAC System Testing, Adjusting and Balancing Standard must be utilized when balancing the system. Report the results in writing.

5.11 Submit a draft Workplan to the FAA for review and approval. The Workplan must describe the methods, step-by-step procedures, and strategies to complete each task. The FAA will require 3 weeks for review and comment. FAA will provide comments to the Contractor for incorporation into the final Workplan. The Contractor must submit the final Workplan to the FAA for approval.

The Contractor must not begin field work without FAA approval of the final Workplan. The Workplan must describe how each task will be accomplished.

5.12 The contractor must run all new units for 48 hours without any trouble or alarms before removing the temporary cooling. Coordinate with COR before removal of temporary cooling.

5.13 The Workplan must include but is not limited to the following:

A. Work schedule including location, times, and impact on occupied spaces.

B. Contractor onsite personnel, names, phone numbers.

C. Step-by-step procedure for accomplishing each task.

D. Equipment and material storage requirements.

E. Power requirements.

F. Trades involved.

5.14 Submittals to be provided are:

A. Workplan (draft and final) B. Product data and MSDS for all materials used on this contract (mastic, caulk, insulation, tape, cleaning solution, sealants, ceiling tiles, rigid protective cover for the exterior insulation, etc).

C. Shop drawings (ductwork opening repair, back draft dampers, access/service doors, ductwork/exterior wall connection, insulation installation, rigid protective jacket installation).

D. Duct cleaning inspector qualifications.

E. Qualifications of the HVAC System Cleaning Contractor (per NADCA specifications) F. Final duct cleaning inspection report (per NADCA specifications)

ASR Building (Showing AHU-1, AHU-2, and AHU-3)

Figure1

Branch of Internal Ductwork and Return Air Diffuser

Figure 2

Former and Current Controls System

Figure 3

Existing 3 ton through wall unit for UPS building

Figure 4

2. Any model different than the above must be reviewed and approved as equal

2. Any model different than the above must be reviewed and approved as equal