AMD 05 - 23 05 93.pdf

DD#2 Complex Amendment 2021-04-06 Portsmouth Naval Shipyard, Kittery, ME

SECTION 23 05 93

TESTING, ADJUSTING, AND BALANCING FOR HVAC

08/09

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ACOUSTICAL SOCIETY OF AMERICA (ASA)

ASA S1.11 (2004; Errata 2005; R 2009) Specification for Octave- Band and Fractional-Octave-Band Analog and Digital Filters (ASA 65)

ASA S1.4 (1983; Amendment 1985; R 2006) Specification for Sound Level Meters (ASA 47)

ASSOCIATED AIR BALANCE COUNCIL (AABC)

AABC MN-1 (2002; 6th ed) National Standards for Total System Balance

AABC MN-4 (1996) Test and Balance Procedures

NATIONAL ENVIRONMENTAL BALANCING BUREAU (NEBB)

NEBB MASV (2006) Procedural Standards for Measurements and Assessment of Sound and Vibration

NEBB PROCEDURAL STANDARDS (2005) Procedural Standards for TAB (Testing, Adjusting and Balancing) Environmental Systems

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1780 (2002) HVAC Systems - Testing, Adjusting and Balancing, 3rd Edition

SMACNA 1858 (2004) HVAC Sound And Vibration Manual - First Edition

SMACNA 1972 CD (2012) HVAC Air Duct Leakage Test Manual - 2nd Edition

1.2 DEFINITIONS

a. AABC: Associated Air Balance Council.

b. COTR: Contracting Officer's Technical Representative.

SECTION 23 05 93 Page 1

c. DALT: Duct air leakage test

d. DALT'd: Duct air leakage tested

e. HVAC: Heating, ventilating, and air conditioning; or heating, ventilating, and cooling.

f. NEBB: National Environmental Balancing Bureau

g. Out-of-tolerance data: Pertains only to field acceptance testing of Final DALT or TAB report. When applied to DALT work, this ph r ase means "a leakage rate measured during DALT field acceptance testing which exceeds the leakage rate allowed by Appendix D REQUIREMENTS FOR DUCT AIR LEAK TESTING." When applied to TAB work this ph r ase means "a measurement taken during TAB field acceptance testing which does not fall within the range of plus 5 to minus 0 percent of the original measurement reported on the TAB Report for a specific parameter."

h. Season of maximum heating load: The time of year when the outdoor temperature at the project site remains within plus or minus 30 degrees Fahrenheit of the project site's winter outdoor design temperature, throughout the period of TAB data recording.

i. Season of maximum cooling load: The time of year when the outdoor temperature at the project site remains within plus or minus 5 degrees Fahrenheit of the project site's summer outdoor design temperature, throughout the period of TAB data recording.

j. Sound measurements terminology: Defined in AABC MN-1, NEBB MASV, or

SMACNA 1858 (TABB).

k. TAB: Testing, adjusting, and balancing (of HVAC systems).

l. TAB'd: HVAC Testing/Adjusting/Balancing procedures performed.

m. TAB Agency: TAB Firm

n. TAB team field leader: TAB team field leader

o. TAB team supervisor: TAB team engineer.

p. TAB team technicians: TAB team assistants.

q. TABB: Testing Adjusting and Balancing Bureau.

1.2.1 Similar Terms

In some instances, terminology differs between the Contract and the TAB Standard primarily because the intent of this Section is to outline the TAB requirements as specifed in ASME AG-1-2019 and HDBK 1160-2003, along with additional requirements listed herein to produce optimal results.

The following table of similar terms is provided for clarification only.

Contract requirements take precedent over the corresponding AABC, NEBB, or TABB requirements where differences exist.

SECTION 23 05 93 Page 2

SIMILAR TERMS

Contract Term AABC Term NEBB Term TABB Term

TAB Standard National Standards for Testing and Balancing Heating, Ventilating, and Air Conditioning Systems

Procedural Standards for Testing, Adjusting and Balancing of Environmental Systems

International Standards for Environmental Systems Balance

TAB Specialist TAB Engineer TAB Supervisor TAB Supervisor

Systems Readiness Check

Construction Phase Inspection

Field Readiness Check & Preliminary Field Procedures

Field Readiness Check & Prelim.

Field Procedures

1.3 WORK DESCRIPTION

The work includes duct air leakage testing (DALT) and testing, adjusting, and balancing (TAB) of new heating, ventilating, and cooling (HVAC) air distribution systems including ducts, which serve each enclosure.

Perform DALT of the indicated existing systems and equipment in accordance with the following requirements and submit the specified DALT reports for approval. Conduct DALT testing in compliance with the requirements specified in SMACNA 1972 CD, ASME AG-1-2019, HDBK 1169-2003 except as supplemented and modified by this section. The DALT plan shall only be developed from approved shop drawings. Any changes to the shop drawings that affect the DALT or TAB plans shall require a new, resubmitted DALT or TAB plan, within 5 days of the change.

Perform TAB in accordance with the requirements of the TAB procedural standard recommended by the TAB trade association that approved the TAB Firm's qualifications. Comply with requirements of AABC MN-1, NEBB PROCEDURAL STANDARDS, or SMACNA 1780 (TABB), ASME AG-1-2019, HDBK 1169-2003 as supplemented and modified by this specification section. All recommendations and suggested practices contained in the TAB procedural standards are considered mandatory. Submit the specified TAB reports for approval.

Refer to Specification Attachment for specific DALT procedures and record sheets.

1.3.1 Air Distribution Systems

Test, adjust, and balance systems (TAB) in compliance with this section.

Obtain Contracting Officer's written approval before applying insulation to exterior of air distribution systems as specified under Section 23 07 00

THERMAL INSULATION FOR MECHANICAL SYSTEMS.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

SECTION 23 05 93 Page 3 submittals not having a "G" designation are for information only.

Approval by the Architect or Engineer of Record is required for submittals with an "AE" designation. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-07 Certificates

Independent TAB agency and personnel qualifications; G, AE

Tower 5 DALT and TAB Submittal and Work Schedule; G, AE Tower 6 DALT and TAB Submittal and Work Schedule; G, AE Ground Level DALT And TAB Submittal And Work Schedule; G, AE Enclosure 8 DALT and TAB Submittal and Work Schedule; G, AE

Enclosure 5 and Enclosure 7 DALT and TAB Submittal and Work Schedule; G, AE Enclosure 4 DALT and TAB Submittal and Work Schedule; G, AE Enclosure 6 DALT And TAB Submittal And Work Schedule; G, AE

Tower 5 Prerequisite HVAC Work Check Out List; G, AE Tower 6 Prerequisite HVAC Work Check Out List; G, AE Ground Level Prerequisite HVAC Work Check Out List; G, AE Enclosure 8 Prerequisite HVAC Work Check Out List; G, AE Enclosure 5 and Enclosure 7 Prerequisite HVAC Work Check Out List;

G, AE

Enclosure 4 Prerequisite HVAC Work Check Out List; G, AE Enclosure 6 Prerequisite HVAC Work Check Out List; <SUB>G, AE</SUB>

Tower 5 Advance notice of Pre-Final DALT field work; G, AE Tower 6 Advance notice of Pre-Final DALT field work; G, AE Ground Level Advance Notice Of Pre-Final Dalt Field Work; G, AE Enclosure 8 Advance notice of Pre-Final DALT field work; G, AE Enclosure 4 Advance Notice Of Pre-Final Dalt Field Work; G, AE Enclosure 5 and Enclosure 7 Advance notice of Pre-Final DALT field work; G, AE Enclosure 6 Advance Notice Of Pre-Final Dalt Field Work; G, AE

Tower 5 Pre-Field DALT Preliminary Notification; G, AE Tower 6 Pre-Field DALT Preliminary Notification; G, AE Ground Level Pre-Field Dalt Preliminary Notification; G, AE Enclosure 8 Pre-Field DALT Preliminary Notification; G, AE Enclosure 4 Pre-Field Dalt Preliminary Notification; G, AE Enclosure 5 and Enclosure 7 Pre-Field DALT Preliminary Notification;

G, AE

Enclosure 6 Pre-Field DALT Preliminary Notification; G, AE

Tower 5 Completed Pre-Final DALT Work Checklist; G, AE Tower 6 Completed Pre-Final DALT Work Checklist; G, AE Ground Level Completed Pre-Final DALT Work Checklist; G, AE Enclosure 8 Completed Pre-Final DALT Work Checklist; G, AE Enclosure 4 Completed Pre-Final DALT Work Checklist; G, AE Enclosure 5 and Enclosure 7 Completed Pre-Final DALT Work Checklist;

G, AE

Enclosure 6 Completed Pre-Final DALT Work Checklist; G, AE

Tower 5 Pre-Field TAB Engineering Report; G, AE Tower 6 Pre-Field TAB Engineering Report; G, AE Ground Level Pre-Field TAB Engineering Report; G, AE

SECTION 23 05 93 Page 4

Enclosure 8 Pre-Field TAB Engineering Report; G, AE Enclosure 4 Pre-Field TAB Engineering Report; G, AE Enclosure 5 and Enclosure 7 Pre-Field TAB Engineering Report; G, AE Enclosure 6 Pre-Field TAB Engineering Report; G, AE

Tower 5 Pre-final DALT Report; G, AE Tower 6 Pre-final DALT Report; G, AE Ground Level Pre-Final DALT Report; G, AE Enclosure 8 Pre-final DALT Report; G, AE Enclosure 4 Pre-Final DALT Report; G, AE Enclosure 5 and Enclosure 7 Pre-final DALT Report; G, AE Enclosure 6 Pre-Final DALT Report; G, AE

Tower 5 Advance Notice TAB Field Work; G, AE Tower 6 Advance Notice TAB Field Work; G, AE Ground Level Advance Notice TAB Field Work; G, AE Enclosure 8 Advance Notice of TAB Field Work; G, AE Enclosure 5 and Enclosure 7 Advance Notice of TAB Field Work; G, AE Enclosure 4 Advance Notice of TAB Field Work; G, AE Enclosure 6 Advance Notice Of TAB Field Work; G, AE

Tower 5 Completed Pre-TAB Work Checklist; G, AE Tower 6 Completed Pre-TAB Work Checklist; G, AE Ground Level Completed Pre-TAB Work Checklist; G, AE Enclosure 8 Completed Pre-TAB Work Checklist; G, AE Enclosure 5 and Enclosure 7 Completed Pre-TAB Work Checklist; G, AE Enclosure 4 Completed Pre-TAB Work Checklist; G, AE Enclosure 6 Completed Pre-TAB Work Checklist; G, AE

Tower 5 DALT and TAB Work Execution Schedule; G, AE Tower 6 DALT and TAB Work Execution Schedule; G, AE Ground Level Dalt And Tab Work Execution Schedule; G, AE Enclosure 8 DALT and TAB Work Execution Schedule; G, AE Enclosure 5 and Enclosure 7 DALT and TAB Work Execution Schedule;

G, AE

Enclosure 4 DALT and TAB Work Execution Schedule; G, AE Enclosure 6 DALT and TAB Work Execution Schedule; G, AE

Tower 5 DALT and TAB Procedures Summary; G, AE Tower 6 DALT and TAB Procedures Summary; G, AE Ground Level DALT And TAB Procedures Summary; G, AE Enclosure 8 DALT and TAB Procedures Summary; G, AE Enclosure 5 and Enclosure 7 DALT and TAB Procedures Summary; G, AE Enclosure 4 DALT and TAB Procedures Summary; G, AE Enclosure 6 DALT and TAB Procedures Summary; G, AE

Tower 5 Design Review Report; G, AE Tower 6 Design Review Report; G, AE Ground Level Design Review Report; G, AE Enclosure 8 Design Review Report; G, AE Enclosure 5 and Enclosure 7 Design Review Report; G, AE Enclosure 4 Design Review Report; G, AE Enclosure 6 Design Review Report; G, AE

Tower 5 Final DALT Report; G, AE Tower 6 Final DALT Report; G, AE Ground Level Final DALT Report; G, AE Enclosure 8 Final DALT Report; G, AE Enclosure 4 Final DALT Report; G, AE

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Enclosure 5 and Enclosure 7 Final DALT Report; G, AE Enclosure 6 Final DALT Report; G, AE

Tower Smoke Test Procedures; G, AE

1.5 QUALITY ASSURANCE

1.5.1 Independent TAB Agency and Personnel Qualifications

To secure approval for the proposed agency, submit information certifying that the TAB agency is a first tier subcontractor who is not affiliated with any other company participating in work on this contract, including design, furnishing equipment, or construction. Also, submit documentation verifying that the TAB agency has worked on other similar facilities and include project list with dates.

Submit the following:

Independent TAB agency and personnel qualifications

Further, submit the following, for the agency, to Contracting Officer for approval:

a. Independent AABC or NEBB or TABB TAB agency:

TAB agency: AABC registration number and expiration date of current certification; or NEBB certification number and expiration date of current certification; or TABB certification number and expiration date of current certification.

TAB team supervisor: Name and copy of AABC or NEBB or TABB TAB supervisor certificate and expiration date of current certification.

TAB team field leader: Name and documented evidence that the team field leader has satisfactorily performed full-time supervision of TAB work in the field for not less than 3 years immediately preceding this contract's bid opening date.

TAB team field technicians: Names and documented evidence that each field technician has satisfactorily assisted a TAB team field leader in performance of TAB work in the field for not less than one year immediately preceding this contract's bid opening date.

Current certificates: Registrations and certifications are current, and valid for the duration of this contract. Renew Certifications which expire prior to completion of the TAB work, in a timely manner so that there is no lapse in registration or certification. TAB agency or TAB team personnel without a current registration or current certification are not to perform TAB work on this contract.

b. TAB Team Members: TAB team approved to accomplish work on this contract are full-time employees of the TAB agency. No other personnel is allowed to do TAB work on this contract.

c. Replacement of TAB team members: Replacement of members may occur if each new member complies with the applicable personnel qualifications and each is approved by the Contracting Officer.

SECTION 23 05 93 Page 6

d. Third Party DALT and TAB Witness: Name and documented evidence that Third Party DALT and TAB Witness has satisfactorily performed DALT and TAB work in the field for not less than 3 years immediately preceding this contract's bid opening date. Third Party DALT and TAB Witness shall not be affiliated with manufacturer, contractor, or project.

Third Party DALT and TAB Witness is provided by the contractor.

1.6 SEQUENCING AND SCHEDULING

1.6.1 DALT and TAB Submittal and Work Schedule

Comply with additional requirements specified in Appendix C: DALT AND TAB SUBMITTAL AND WORK SCHEDULE included at the end of this section

Any revisions to the approved ductwork shop drawings will require submission/resubmission of the DALT plan upon approval of revised duct shop drawings. Typical submittal review durations will apply.

1.6.2 Phasing of Work

1.6.2.1 Phasing of Work

This specification section is structured as though the HVAC construction, and thereby the DALT and TAB work, is going to be completed in a single phase. Note, DALT of a system must be done before TAB of the system, see section 3.3.9. When a contract is to be completed in construction phases, including the DALT work, and the TAB work, the DALT work and TAB work must be planned for, completed and approved by the Contracting Officer with each phase. An example of this case would be one contract that requires the rehabilitation of the HVAC in each of several separated enclosures.

At the completion of the final phase, compile all approved reports and submit as one document.

1.6.3 DALT and TAB Submittal and Work Schedule

Submit this schedule, and TAB Schematic Drawings, adapted for this particular contract, to the Contracting Officer (CO) for review and approval. Include with the submittal the calibration certificates for DALT/TAB equipment. Include with the submittal the planned calendar dates for each submittal or work item. Resubmit an updated version for CO approval every 90 calendar days days. Compliance with the following schedule is the Contractor's responsibility.

a. The following work schedules shall be submitted for each enclosure as follows:

Tower 5 DALT and TAB Submittal and Work Schedule Tower 6 DALT and TAB Submittal and Work Schedule Ground Level DALT and TAB Submittal and Work Schedule Enclosure 8 DALT and TAB Submittal and Work Schedule Enclosure 5 and Enclosure 7 DALT and TAB Submittal and Work Schedule Enclosure 4 DALT and TAB Submittal and Work Schedule Enclosure 6 DALT and TAB Submittal and Work Schedule

b. Qualify TAB Personnel: Within 45 calendar days after date of contract award, submit TAB agency and personnel qualifications.

SECTION 23 05 93 Page 7

c. Pre-DALT/TAB Meeting: Within 30 calendar days after the date of approval of the TAB agency and personnel, meet with the COTR.

d. Design Review Report: Within 60 calendar days after the date of the TAB agency personnel qualifications approval, submit design review report.

e. Pre-Field DALT Preliminary Notification: On completion of the duct installation for each system, notify the Contracting Officer in writing within 5 days after completion.

f. DALT Field Work or offsite DALT: Cooridate on or offsite DALT with COTR, provide 48 hour notice in writing .

g. Submit Pre-final DALT Report: Within one working day after completion of successful DALT field work, submit Pre-final DALT Report. Separate Pre-final DALT reports may be submitted to allow phased testing from system to system.

h. DALT Work Field Check: Upon approval of the Pre-final DALT Report, schedule the COTR's DALT field check work with the Contracting Officer.

i. Submit Final DALT Report: Within 15 calendar days after completion of successful DALT Work Field Check, submit final DALT report.

j. Pre-Field TAB Engineering Report: Within 15 calendar days after approval of the TAB agency Personnel Qualifications, submit the Pre-Field TAB Engineering Report.

1.6.3.1 Design Review Report

Submit a design review report indicating, for each enclosure, the portions of prefabricated duct sections offsite an d/or field fabricated duct sections. Clearly indicate on the duct shop drawings which portions of duct are being tested and assign individual identification numbers based on the following format:

ENCLOSURE TAG - DUCT LEVEL CLASS - ##

Example: Enclosure 8 - 4 - 01 indicates duct section 1 on a portion of the Level 4 ductwork (per DOE HDBK 1169-2003 and design drawings) upstream of the Enclosure 8 HEPA filter.

If applicable describe omissions and deficiencies in the HVAC system's design that would preclude the TAB team from accomplishing the duct leakage testing work and the TAB work requirements of this section.

Provide a complete explanation including supporting documentation detailing the design deficiency. State that no deficiencies are evident if that is the case.

1.6.3.2 Pre-Field DALT Preliminary Notification

Notification: On completion of the installation of each duct system indicated to be DALT'd, notify the Contracting Officer in writing within 7 calendar days after completion.

Contractor shall provide notification for each separate enclosure as follows:

SECTION 23 05 93 Page 8

Tower 5 Pre-Field DALT Preliminary Notification Tower 6 Pre-Field DALT Preliminary Notification Ground Level Pre-Field DALT Preliminary Notification Enclosure 4 Pre-Field DALT Preliminary Notification Enclosure 8 Pre-Field DALT Preliminary Notification Enclosure 5 and Enclosure 7 Pre-Field DALT Preliminary Notification Enclosure 6 Pre-Field DALT Preliminary Notification

1.6.3.3 Pre-Field TAB Engineering Report

Submit report containing the following information for each enclosure as folows:

Tower 5 Pre-Field TAB Engineering Report Tower 6 Pre-Field TAB Engineering Report Ground Level Pre-Field TAB Engineering Report Enclosure 8 Pre-Field TAB Engineering Report Enclosure 5 and Enclosure 7 Pre-Field TAB Engineering Report Enclosure 4 Pre-Field TAB Engineering Report Enclosure 6 Pre-Field TAB Engineering Report

a. Step-by-step TAB procedure:

(1) Strategy: Describe the method of approach to the TAB field work from start to finish. Include in this description a complete methodology for accomplishing the TAB field work session. Since all systems are essentially constant volume and balanced the same for heating and cooling modes, one test will be performed, and heating and cooling functions will be tested by adjusting temperature setpoints and artificially heating or cooling the zone temperature sensors to confirm heat pump operation in both heating and cooling mode. Provide an additional TAB visit if required, due to seasonal conditions.

(2) Air System Diagrams: Use the contract drawings and duct fabrication drawings if available to provide air system diagrams in the report showing the location of all terminal outlet supply, return, exhaust and transfer registers, grilles and diffusers.

Use a key numbering system on the diagrams which identifies each outlet contained in the outlet airflow report sheets. Show intended locations of all traverses and static pressure readings.

(3) Procedural steps: Delineate fully the intended procedural steps to be taken by the TAB field team to accomplish the required TAB work of each air distribution system. Include intended procedural steps for TAB work for subsystems and system components.

b. Pre-field data: Submit AABC or NEBB or SMACNA 1780 data report forms with the following pre-field information filled in:

(1) Design data obtained from system drawings, specifications, and approved submittals.

(2) Notations detailing additional data to be obtained from the contract site by the TAB field team.

(3) Designate the actual data to be measured in the TAB field work.

(4) Provide a list of the types of instruments, and the measuring

SECTION 23 05 93 Page 9 range of each, which are anticipated to be used for measuring in the TAB field work. By means of a keying scheme, specify on each TAB data report form submitted, which instruments will be used for measuring each item of TAB data. If the selection of which instrument to use, is to be made in the field, specify from which instruments the choice will be made. Place the instrument key number in the blank space where the measured data would be entered.

c. Prerequisite HVAC work checkout list: Provide a list of inspections and work items which are to be completed by the Contractor. This list must be acted upon and completed by the Contractor and then submitted and approved by the Contracting Officer prior to the TAB team coming to the contract site.

At a minimum, a list of the applicable inspections and work items listed in the NEBB PROCEDURAL STANDARDS, Section III, "Preliminary TAB Procedures" under paragraphs titled, "Air Distribution System Inspection" must be provided for each separate system to be TAB'd.

Submit report containing the previous information for each enclosure as follows:

Tower 5 Prerequisite HVAC Work Check Out List Tower 6 Prerequisite HVAC Work Check Out List ground level prerequisite hvac work check out list Enclosure 8 Prerequisite HVAC Work Check Out List Enclosure 5 and Enclosure 7 Prerequisite HVAC Work Check Out List Enclosure 4 Prerequisite HVAC Work Check Out List Enclosure 6 Prerequisite Hvac Work Check Out List

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 WORK DESCRIPTIONS OF PARTICIPANTS

Comply with requirements of this section as specified in Appendix A WORK DESCRIPTIONS OF PARTICIPANTS. Refer to section 01 91 13 GENERAL COMMISSIONING REQUIREMENTS for coordination of DALT and TAB with commissioning agent's responsibilities.

3.2 PRE-DALT/TAB MEETING

Meet with the Contracting Officer's technical representative (COTR) and the designing engineer of the HVAC systems to develop a mutual understanding relative to the details of the DALT work and TAB work requirements. Ensure that the TAB supervisor and Commissioning Agent are present at this meeting. Requirements to be discussed include required submittals, work schedule, and field quality control.

3.3 DALT PROCEDURES

3.3.1 Instruments, Consumables and Personnel

Provide instruments, consumables and personnel required to accomplish and capable of accomplishing the DALT field work. Follow the same basic procedure specified below for TAB Field Work, including maintenance and

SECTION 23 05 93 Page 10 calibration of instruments, accuracy of measurements, preliminary procedures, field work, workmanship and treatment of deficiencies.

Calibrate and maintain instruments in accordance with manufacturer's written procedures. Provide documentation verifying that the testing equipment does not leak.

3.3.2 Advance Notice of Pre-Final DALT Field Work

When preparing to test each section indicated to be DALT'd, notify the Contracting Officer in writing prior to the COTR's duct selection field visit.

The Contractor shall provide separate notice for each enclosure as follows and reported in the 3-week lookahead :

Tower 5 Advance notice of Pre-Final DALT field work Tower 6 Advance notice of Pre-Final DALT field work Ground Level Advance Notice of Pre-Final DALT Field Work Enclosure 8 Advance notice of Pre-Final DALT field work Enclosure 4 Advance Notice of Pre-Final DALT Field Work Enclosure 5 and Enclosure 7 Advance notice of Pre-Final DALT field work Enclosure 6 Advance Notice of Pre-Final DALT Field Work

3.3.3 Ductwork To Be DALT'd

a. All components forming the pressure boundary shall be pneumatically, statically tested for structural capability and leak rate measurement.

Components include but are not limited to: duct work, fan and filter housings, dampers, coil housings, gages, flex connections, shaft seals, bolted duct access panels, and any other components that are part of the pressure boundary.

b. It is acceptable for testing to occur either on or off site provided all testing requirements are followed, advance notice is provided to the government such that a representative may be present to witness testing at the option of the government, and documented on test record sheets accompanied by the applicable DALT diagram with clearly defined boundaries for the each test.

c. DALT testing shall be performed per the procedures in appendix B of this spec and data recorded on the associated test record. See attachment A for specific procedures and test record sheets. Blanks shall be used to isolate the pressure boundary as defined on DALT diagram for each test. The blanks must be heavy gauge and reinforced to be capable of widthstanding test pressures without excessive sealing to meet test pressures. For blanks being used for connection of test device, provide a welded 4" diameter collar (or size of test hose) to the blank to eliminate leakage through the test blank.

d. A system pressure test plan shall be submitted and include marked up drawings of each enclosure's ventilation systems clearly defining the boundaries of each test section, and with each test section assigned a unique enclosure/section I.D. number with respect to each enclosure.

For example, " Tower S-1" identifies the enclosure and section. Each unique sequential ID may only be used once per enclosure.

e. Static test pressure for each test section shall be determined and specified by the government based on the submitted test plan from the contractor. The test pressure will be either positive or negative

SECTION 23 05 93 Page 11 depending on the component or sections location with respect to the system fan.

f. The most limiting Structural Capability Pressure (SCP), the pressure that a section or component can safely withstand without breach of integrity or unacceptable distortion, will be specified by the government for each test section based on the test plan submitted by the testing contractor. Refer to the DALT procedure of this specification for DALT pressurization with respect to the SCP. In demonstrating that each section and component does not rupture, leak in excess of permissible leak rate, or permanently deform under design pressure loads during DALT, the requirements for structural capability testing will be satisfied concurrently.

g. Testing shall be conducted using either the pressure decay method or the constant pressure method to verify that the leak rate for system does not exceed the allowable limit. Testing shall be conducted as specified in the DALT Procedures & Records of this specification which are in accordance with Mandatory Appendix TA-III of ASME AG-1-2019 and the DOE HDBK 1169-2003. For SMACNA rated duct, testing shall be conducted in accordance with the surface area method of the SMACNA Air Duct Leakage Test Manual, Second Edition.

h. Once the entire pressure boundary of the system is assembled and installed, a visible inspection which shall include smoke or soap bubble checks shall be performed to verify interface connection integrity of all remaining untested interface joints. For the smoke or soap bubble check, the system shall be pressurized to the most limiting structural capability pressure of the system as determined by the government. The bubble checks are only for positive pressure systems, and smoke checks are only for negative pressure systems.

Minimize smoke checks to reduce contamination of the filter housing.

Smoke/Bubble checks are not allowed on Level 4 ductwork. A full system DALT of Level 4 ductwork must be performed.

1i . All untested pressure boundary interface connections made between previously tested sections require as a minimum, a smoke or soap bubble check, and a visual inspection as follows:

2j . Before Bolting:

Flange seating surfaces shall be visually examined for cleanliness and acceptable surface finish. Flange faces shall be examined for compliance with tolerances for mutual parallelism and axial alignment, as well as for planarity of each flange. Gaskets shall be visually examined to ensure conformance with specified dimensional tolerances and freedom from tears, breaks, or other defects.

3k. After Bolting:

Bolts in all bolted connections shall be examined to ensure bolts are in place. Gaskets in bolted connections shall be visually examined for uniform compression and free from tears, breaks, and other defects .

l. Untested joints shall each be uniquely identified and results of the inspection shall be provided and shall contain the following as a minimum:

(1) Date of the inspection results, and inspector's signature

(2) Identification of instruments, equipment, tools, and documents to the extent that they or their equivalents can be identified for future

SECTION 23 05 93 Page 12 examinations

(3) Observations and dimensional checks specified by the respective test data and reports developed during inspection and testing

(4) Conclusion and recommendation by visual inspection and testing personnel

(5) Reference to previous reports if this report is for re-inspection and testing

m. Visual Inspection Criteria:

Field acceptance visual inspections shall include verification of component installation in accordance with the owner's design specification and the supplier's installation and operating manual.

Visual inspections are acceptable when there are no visual indications of improper installation, physical damage, structural distress, or degradation that would impair the ability of a component or system to perform its intended function.

n. Dampers shall not be in the closed be in the open position during the DALT procedure.

3.3.4 DALT Testing

Perform DALT on all pressure boundary sections of each level class as shown on the design drawings (Level 2 or Level 4) as well as interior SMACNA ductwork. Use the duct class, seal class, leakage class and the leak test pressure data indicated on the drawings, to comply with the procedures specified in ASME -AG-1-2019 Article TA-III-4000 Procedur eal Guidelines for pressure testing and HDBK 1169-2003 Table 5.6 Recommended Maximum Permissible Duct Leak Rates.

a. DALT Boundaries: The HEPA filters delineate the boundary between the two levels of duct classification (Level 4 = upstream, Level 2 = downstream). Although the boundary between level 2 and level 4 testing is the actual HEPA filter, a convenient boundary for ease of testing must be determined for which a joint can be blanked off creating a pressure boundary. The downstream flanged joint of the downstream transition that is welded to the filter housing shall serve as a convenient test boundary between level 2 criteria and level 4 criteria.

b. Level 2 testing: Ducting and associated equipment downstream of the HEPA filter housing to the first flange inside each enclosure are subject to satisfying the Level 2 permissible leak rates as outlined in the Level 2 DALT procedures and test records in Attachment "A" of this spec (in accordance with Table 5.6 of the DOE-Handbook 1169-2003). Refer to the Level 2 Constant Pressure and Pressure Decay Procedure inserts at the end of this section. Total free air volume calculations will be required for Level 2 ductwork being tested in sections. The contractor shall be responsible for providing the air volume calculations for each duct component, section, and total volume. The Government will provide permissible leakage rates for individual sections of Level 2 ductwork based on the volume of each individual section.

c. Level 4 testing: Ducting and associated equipment upstream of, and including the HEPA filter housing are subject to satisfying the Level 4 permissible leak rates as outlined in the Level 4 DALT procedures and test records in Attachment "A" of this spec (in accordance with Table 5.6 of the DOE-Handbook 1169-2003). Total free air volume calculations for this test procedure shall be clearly identified based

SECTION 23 05 93 Page 13 on as-built conditions. The contractor shall be responsible for providing the air volume calculations for each duct component, section, and total volume. The Government will provide permissible leak rates for Level 4 testing. Refer to the Level 4 Constant Pressure and Pressure Decay Procedure inserts at the end of this section.

d. DALT test sections for interior supply ductwork shall be in accordance with (2012) SMACNA HVAC Air Duct Leakage Test Manual - 2nd Edition.

Interior return ductwork is Level 4.

e. DALT test sections may be individual components or assemblies of pressure boundary components forming a section, whichever is preferred by the testing contractor.

f. When leak testing sections as an assembly, components with the same duct classification level (Level 2 or Level 4) may be tested simultaneously as an assembly. A fully installed Level 2 DALT may be performed on a combination of Level 2 and Level 4 duct. If the entire system passes the test, this indicates the Level 2 section passes.

This allowance can be made if it provides any benefit for the company performing the DALT. It could provide a convenient way of testing previously untested joints downstream instead of doing soap or smoke checks.

g. The most conservative maximum operating pressure of an assembly shall be used when determining the permissible leakage rate, as though the assembly is a single continuous section. The maximum operating pressure, test pressures, and structural capability pressure will be provided by the government following receipt of the test plan and free air volume calculations .

3.3.5 Pre-final DALT Report

After completion of the DALT work, prepare a Pre-final DALT Report meeting the additional requirements specified in Appendix B REPORTS - DALT and TAB. Data required by those data report forms shall be furnished by the TAB team. Prepare the report neatly and legibly; the Pre-final DALT report shall provide the basis for the Final DALT Report.

TAB supervisor shall review, approve and sign the Pre-Final DALT Report and submit this report within two days of completion of DALT field work.

Verbally notify the COTR that the field check of the Pre-Final DALT Report data can commence.

The Contractor shall submit a separate report for each enclosure as follows:

Tower 5 Pre-final DALT Report Tower 6 Pre-final DALT Report Ground Level Pre-final DALT Report Enclosure 8 Pre-final DALT Report Enclosure 4 Pre-final DALT Report Enclosure 5 and Enclosure 7 Pre-final DALT Report Enclosure 6 Pre-final DALT Report

3.3.6 Quality Assurance - COTR DALT Field Acceptance Testing

In the presence of the COTR and TAB team field leader and Commissioning Agent, verify for accuracy Pre-final DALT Report data selected by the COTR.

SECTION 23 05 93 Page 14

Further, if any data on the Pre-final DALT report form for a given duct section is out-of-tolerance, then a re-test shall be performed until section is within tolerance at no additional cost or schedule impact to the government .

3.3.7 Additional COTR Field Acceptance Testing

If any of the duct sections checked for a given system are determined to have a leakage rate measured that exceeds the leakage rate allowed by methods outlined above for an indicated duct csection, terminate data checking for that section. The associated Pre-final DALT Report data for the given duct system will be disapproved. Make the necessary corrections and prepare a revised Pre-final DALT Report. Reschedule a field check of the revised report data with the COTR at no additional cost or schedule impact to the government .

3.3.8 Certified Final DALT Report

On successful completion of all field checks of the Pre-Final DALT Report data for all systems, the TAB Supervisor shall assemble, review, approve, sign and submit the Final DALT Report in compliance with Appendix B REPORTS - DALT and TAB to the Contracting Officer for approval.

Contractor shall submit a separate report for each enclosure as follows:

Tower 5 Final DALT Report Tower 6 Final DALT Report Ground Level Final DALT Report Enclosure 8 Final DALT Report Enclosure 4 Ff inal dalt DALT report Enclosure 5 and Enclosure 7 Final DALT Report Enclosure 6 f Final dalt DALT report

3.3.9 Prerequisite for TAB Field Work

Do not commence TAB field work prior to the completion and approval, for all systems, of the Final DALT Report. Also, see section 1.3.1, "Obtain Contracting Officer's written approval before applying insulation to exterior of air distribution systems as specified under Section 23 07 00

THERMAL INSULATION FOR MECHANICAL SYSTEMS."

3.3.9.1 HEPA Filter PAO Test

The Government will perform a PAO test of all installed HEPA filters prior to TAB testing, to prove that the HEPA filters were not damaged while in Government custody for receipt inspection prior to installation and transfer back to the contractor. The Government will perform a PAO test of all installed HEPA filters prior to the Government taking ownership of the systems, to prove that the HEPA filters were not damaged by the contractor prior to the Government taking ownership of the systems.

Filters damaged at any time during any periods of Contractor ownership shall be replaced at no additional cost or schedule impacts.

3.4 TAB PROCEDURES

3.4.1 TAB Field Work

Test, adjust, and balance the HVAC systems until measured flow rates are

SECTION 23 05 93 Page 15 within plus 5 or minus zero percent of the design flow rates as specified or indicated on the contract documents. Contract documents include but are not limited to Drawings and Specifications.

That is, comply with the the requirements of AABC MN-1 , or SMACNA 1780 (TABB) and SMACNA 1858 (TABB), except as supplemented and modified by this section.

a. Provide instruments and consumables required to accomplish the TAB work. Calibrate and maintain instruments in accordance with manufacturer's written procedures. Submit current calibration certificates for all instruments.

b. Conduct TAB work, including measurement accuracy, and sound measurement work in conformance with the AABC MN-1 and AABC MN-4, or NEBB TABES and NEBB MASV, or SMACNA 1780 (used by TABB) and SMACNA 1858 sound measurement procedures, except as supplemented and modified by this section.

c. While operating the fan, coordinate with the controls contractor to ensure that the maximum flow indicated for the associated HEPA filter housing will not be exceeded, nor 600 feet per minute across the heat pump coil.

3.4.2 Preliminary Procedures

Use the approved pre-field engineering report as instructions and procedures for accomplishing TAB field work. TAB engineer is to locate, in the field, test ports required for testing. It is the responsibility of the sheet metal contractor to provide and install test ports as required by the TAB engineer. No test ports shall be created without the shipyard approval of the test port locaton and design.

3.4.3 TAB Air Distribution Systems

3.4.3.1 Units With Coils

Report heating and cooling performance capacity tests for DX and electric coils for the purpose of verifying that the coils meet the indicated design capacity. Submit the following data and calculations with the coil test reports:

a. For units with capacities greater than 7.5 tons (90,000 Btu) cooling, such as factory manufactured units, central built-up units and rooftop units, conduct capacity tests in accordance with AABC MN-4, procedure 3.5, "Coil Capacity Testing."

b. Do not determine entering and leaving wet and dry bulb temperatures by single point measurement, but by the average of multiple readings in compliance with paragraph 3.5-5, "Procedures", (in subparagraph d.) of AABC MN-4, Procedure 3.5, "Coil Capacity Testing."

c. Submit part-load coil performance data from the coil manufacturer converting test conditions to design conditions; use the data for the purpose of verifying that the coils meet the indicated design capacity in compliance with AABC MN-4, Procedure 3.5, "Coil Capacity Testing," paragraph 3.5.7, "Actual Capacity Vs. Design Capacity" (in subparagraph c.).

SECTION 23 05 93 Page 16

3.4.3.2 Rooftop Units

Air handling unit systems including fans (air handling unit fans, exhaust fans and winter ventilation fans), coils, ducts, plenums, mixing boxes, terminal units, variable air volume boxes, and air distribution devices for supply air, return air, outside air, mixed air relief air, and makeup air.

3.4.3.3 HVAC Skid

HVAC Skid and associated airflow including coils, ducts, return dampers, engineered vent dampers, supply damper and exhaust damper DP sensors and AFMS's. .

3.4.4 Sound Tests

3.4.4.1 Sound Metering

Measure sound levels with a sound meter complying with ASA S1.4 , Type 1 or 2, and an octave band filter set complying with ASA S1.11 . Use measurement methods for overall sound levels and for octave band sound levels as prescribed by NEBB. Measure sound levels at the work areas on Level 1 & 2 in tower, Enclosure 8 floor level, Enclosure 7 and Enclosure 5 working area 5 feet from any return grille or duct. Maximum permissible sound level is 84 dBA.

Measure sound levels external to each the HVAC skid at a distance of 5 feet at a minimum of 3 points. Maximum permissible sound level is 84 dBA.

Tests shall be conducted under operating conditions as shown on the drawings for each ventilation system.

3.4.5 Performance Tests

3.4.5.1 Operational Tests

In addition to the TAB proportionate balancing work on the air distribution systems, accomplish TAB work on the HVAC systems which directly transfer thermal energy. TAB the operational performance of the heating systems and cooling systems. All required flow measurements shall be obtained by taking traverse measurements at appropriate shipyard approved locations.

For Tower 5, Tower 6, Enclosure 8, and Enclosure 6, perform operations tests to achieve a negative space pressure differential of -0.2" wg. at the rated return airflow as shown on the design drawings with the engineered vent dampers closed. Modulate exhaust damper, recircualtion fan speed and supply damper to achieve building setpoint in an interative iterative process. Record fan speed and damper setpoints for exhaust and return. Do not exceed maximum flow of the respective filter housing. Do not exceed the exhaust airflow as shown on the design drawings. The actual flow rate is not important as long as the negative pressure requirement of the enclosure is met.

With each system running at the design flow and negative dP, open engineered vent dampers. Modulate the return air dampers as needed to achieve the total design flow shown on the design drawings for Enclosure 8, Enclosure 6, and in each tower. The airflows are indicated on the contract drawings at each supply diffuser, return grille, or engineered

SECTION 23 05 93 Page 17 vent. Eight inch flexible engineered vent lines shall be supplied by PNSY, attached to the vent connections with the following lengths for testing purposes: Tower 5: 50 ft each, Tower 6: 30 ft each, Enclosure 8:

50 ft. The flow rates and number of vent lines are shown on the design drawing schematics. Adjust fan speed in an interative process to re-stablish negative dP in each enclosure. Record all damper and fan speed set points.

For Enclosure 5 and Enclosure -7, perform operations tests to achieve a negative space pressure differential of -0.2" wg. at the rated return airflow as shown in the contract documents, through the engineered vent dampers. Eight inch diameter flexible engineered vent lines shall be supplied by PNSY, attached to the vent connections with a specific length for each enclosure, for testing purposes, as follows: Enclosure 5/7: 30 feet. The flow rates and the number of vent lines are shown on the design drawing schematics. Enclosure 7 will be tested in its storage location.Ventilation hoses will be installed through 8 inch openings to pull air from the structure. Modulate exhaust damper, recircualtion fan speed and supply damper to achieve building setpoint in an interative process. Record fan speed and setpoints for exhaust and engineered vent dampers. Do not exceed max flow of filter housing. Do not exceed the exhaust airflow as shown on the design drawings.

Simulate HEPA filter loading by modulating the return dampers and fan speed as necessary to increase the negative static pressure upstream of the fan. The required increase in static pressure would be equal to 5” wc minus the initial recorded pressure drop across the pre-filter and HEPA filters.

3.4.5.1.1 Downward Airflow Smoke Checks (Tower)

With each enclosure under negative pressure perform a smoke test to confirm downward airflow at the level of most restrictive opening and witnessed by PNSY. Provide 7-day notice for each test.

In each tower, introduce smoke at Level 2 just above the floor opening and visually confirm downward airflow through the level 2 opening.

Contractor shall develop Smoke Test Procedures with smoke generating equipment specifications.

Submit separate procedures for each enclosure as follows:

Tower Smoke Test Procedures

Record results (pass/fail) accompanied by a sketch of where each test was performed with respect to the opening in the enclosure and include with submission of operational test data. Retesting of failed downward airflow tests shall not result in additional cost to the government.

For Enclosure 5/7, the Government shall provide the required angle for the supply diffuser blades.

3.4.5.2 Ambient Temperatures

On each tab report form used for recording data, record the outdoor and indoor ambient dry bulb temperature range and the outdoor and indoor ambient wet bulb temperature range within which the report form's data was recorded. Record these temperatures at beginning and at the end of data

SECTION 23 05 93 Page 18 taking.

3.4.6 TAB Work on Performance Tests With Seasonal Limitations

3.4.6.1 Performance Tests

Accomplish proportionate balancing TAB work on the air distribution systems, in other words, accomplish adjusting and balancing of the air flows any time during the duration of this contract, subject to the limitations specified elsewhere in this section. However, accomplish, within the following seasonal limitations, TAB work on HVAC systems which directly transfer thermal energy.

3.4.6.2 Ambient Temperatures

On each tab report form used for recording data, record the outdoor and indoor ambient dry bulb temperature range and the outdoor and indoor ambient wet bulb temperature range within which the report form's data was recorded. Record these temperatures at beginning and at the end of data taking.

3.4.7 Workmanship

Conduct TAB work on the HVAC systems until measured flow rates are within plus 5 or minus zero percent of the design flow rates as specified or indicated on the contract documents. This TAB work includes adjustment of balancing valves, balancing dampers, and sheaves. Further, this TAB work includes changing out fan sheaves if required to obtain air flow rates specified or indicated. If, with these adjustments and equipment changes, the specified or indicated design flow rates cannot be attained, contact the Contracting Officer for direction.

3.4.8 Deficiencies

Strive to meet the intent of this section to maximize the performance of the equipment as designed and installed. However, if deficiencies in equipment design or installation prevent TAB work from being accomplished within the range of design values specified in the paragraph entitled "Workmanship," provide written notice as soon as possible to the Contractor and the Contracting Officer describing the deficiency and recommended correction.

Responsibility for correction of installation deficiencies is the Contractor's. If a deficiency is in equipment design, call the TAB team supervisor for technical assistance. Responsibility for reporting design deficiencies to Contractor is the TAB team supervisor's.

3.4.9 TAB Reports

Additional requirements for TAB Reports are specified in Appendix B REPORTS - DALT and TAB

3.4.10 Quality Assurance - COTR TAB Field Acceptance Testing

3.4.10.1 TAB Field Acceptance Testing

During the field acceptance testing, verify, in the presence of the COTR and Commissioning Agent, random selections of data (air quantities, air motion, sound level readings) recorded in the TAB Report. Points and

SECTION 23 05 93 Page 19 areas for field acceptance testing are to be selected by the COTR.

Measurement and test procedures are the same as approved for TAB work for the TAB Report.

Field acceptance testing includes verification of TAB Report data recorded for the following equipment groups:

Group 1: All recirculation fans and HVAC Skids (rooftop unit for Enclosure 4).

Group 2: 100 percent of the supply diffusers, registers, grilles associated with "constant volume" HVAC Skids.

Group 3: 100 percent of the return grilles, engineered ventilation ducts, and exhaust ducts.

Group 4: 100 percent of the recirculation fans.

Further, if any data on the TAB Report for Groups 1 through 4 is found not to fall within…