Hines CMOP - EPS Warehouse HVAC Corrections - FINAL Specifications 20250226 - Updated.pdf

03-01-23

23 05 93 - 1

SECTION 23 05 93

TESTING, ADJUSTING, AND BALANCING FOR HVAC

PART 1 - GENERAL

1.1 DESCRIPTION

A. A complete listing of common acronyms and abbreviations are included in

Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

B. Testing, adjusting, and balancing (TAB) of heating, ventilating and air conditioning (HVAC) systems. TAB includes the following:

1. Planning systematic TAB procedures.

2. Design Review Report.

3. Systems Inspection Report.

4. Duct Air Leakage Test Report.

5. Systems Readiness Report.

6. Balancing air and water distribution systems; adjustment of total system to provide design performance; and testing performance of equipment and automatic controls.

7. Vibration and sound measurements.

8. Recording and reporting results.

9. Document critical paths of flow on reports.

C. Definitions:

1. Basic TAB used in this Section: Chapter 39, "Testing, Adjusting and

Balancing" of ASHRAE Handbook "HVAC Applications".

2. TAB: Testing, Adjusting and Balancing; the process of checking and adjusting HVAC systems to meet design objectives.

3. AABC: Associated Air Balance Council.

4. NEBB: National Environmental Balancing Bureau.

5. TABB: Testing Adjusting and Balancing Bureau.

6. SMACNA: Sheet Metal and Air Conditioning Contractors’ National

Association.

8. Air Systems: Includes all outside air, supply air, return air, exhaust air and relief air systems.

9. Flow Rate Tolerance: The allowable percentage variation, minus to plus, of actual flow rate from values (design) in the contract documents.

1.2 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS.

B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

23 05 93 - 2

C.

D.

E.

F. Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

G. Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND

EQUIPMENT.

H. Section 23 07 11, HVAC AND BOILER PLANT INSULATION.

I.

J. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

K. Section 23 31 00, HVAC DUCTS AND CASINGS.

L. Section 23 36 00, AIR TERMINAL UNITS.

M. Section 23 64 00, PACKAGED WATER CHILLERS.

N. Section 23 65 00, COOLING TOWERS.

1.3 APPLICABLE PUBLICATIONS

A. The following publications form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standards will govern.

B. American Society of Heating, Refrigerating and Air Conditioning

Engineers, Inc. (ASHRAE):

2019....................ASHRAE Handbook – HVAC Applications, Chapter

39, Testing, Adjusting, and Balancing and

Chapter 49, Noise and Vibration Control

C. Associated Air Balance Council (AABC):

2016....................National Standards for Total System Balance, 7th

Edition

D. National Environmental Balancing Bureau (NEBB):

2019....................Procedural Standard for Testing, Adjusting, and

Balancing of Environmental Systems, 9th Edition

2015....................Procedural Standard for the Measurement of

Sound and Vibration, 2nd Edition

S110-2019...............Whole Building Technical Commissioning of New

Construction, 2nd Edition

E. Sheet Metal and Air Conditioning Contractors National Association

(SMACNA):

2002....................HVAC Systems Testing, Adjusting and Balancing, 3rd Edition

2003....................TAB Procedural Guide 1st Edition

23 05 93 - 3

1.4 SUBMITTALS

A. Submittals, including number of required copies, shall be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND

SAMPLES.

B. Information and material submitted under this section shall be marked

“SUBMITTED UNDER SECTION XX XX XX, SECTION TITLE”, with applicable paragraph identification.

C. Submit names and qualifications of TAB agency and TAB Specialists within 60 days after the notice to proceed. Submit information on three recently completed projects and a list of proposed test equipment.

D. For use by the COR staff, submit one complete set of applicable AABC, NEBB or TABB publications that will be the basis of TAB work.

E. Submit the following for review and approval:

1. Design Review Report within 90 days for conventional design projects after the system layout on air and water side is completed by the

Contractor.

2. Systems inspection report on equipment and installation for conformance with design.

3. Duct Air Leakage Test Report.

4. Systems Readiness Report.

5. Intermediate and Final TAB reports covering flow balance and adjustments, performance tests, vibration tests and sound tests.

6. Include in final reports uncorrected installation deficiencies noted during TAB and applicable explanatory comments on test results that differ from design requirements.

7. Include in each report the critical path for each balanced branch

(air and hydronic). Every branch shall have at least one terminal device damper 100 percent open.

F. Prior to request for Final or Partial Final inspection, submit completed Test and Balance report for the area with noted critical paths.

1.5 QUALITY ASSURANCE

A. Refer to paragraphs QUALITY ASSURANCE and SUBMITTALS, in Section 23 05

11, COMMON WORK RESULTS FOR HVAC, Section 23 05 10, COMMON WORK RESULTS

FOR BOILER PLANT and STEAM GENERATION, and Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.

B. Qualifications:

23 05 93 - 4

1. TAB Agency: The TAB agency shall be a subcontractor of the General

Contractor and shall report to and be paid by the General

Contractor.

2. The TAB agency shall be either a certified member of AABC, NEBB, or

TABB to perform TAB service for HVAC, water balancing and vibrations and sound testing of equipment. The certification shall be maintained for the entire duration of duties specified herein. If, for any reason, the agency loses subject certification during this period, the General Contractor shall immediately notify the COR and submit another qualified TAB firm for approval. Any agency that has been the subject of disciplinary action by either the AABC, TABB or

NEBB within the five (5) years preceding Contract Award shall not be eligible to perform any work related to the TAB. All work performed in this Section and in other related Sections by the TAB agency shall be considered invalid if the TAB agency loses its certification prior to Contract completion, and the successor agency’s review shows unsatisfactory work performed by the predecessor agency.

3. TAB Specialist: The TAB Specialist shall be either a member of AABC or TABB or an experienced technician of the Agency certified by

NEBB. The certification shall be maintained for the entire duration of duties specified herein. If, for any reason, the Specialist loses subject certification during this period, the General Contractor shall immediately notify the COR and submit another TAB Specialist for approval. Any individual that has been the subject of disciplinary action by either the AABC or the NEBB within the five

(5) years preceding Contract Award shall not be eligible to perform any duties related to the HVAC systems, including TAB. All work specified in this Section and in other related Sections performed by the TAB Specialist shall be considered invalid if the TAB Specialist loses its certification prior to Contract completion and shall be performed by an approved successor.

4. TAB Specialist shall be identified by the General Contractor within sixty (60) days after the Notice to Proceed. The TAB Specialist will be coordinating, scheduling, and reporting all TAB work and related activities and will provide necessary information as required by the

COR. The responsibilities shall specifically include:

23 05 93 - 5

a. Directly supervising all TAB work.

b. Sign the TAB reports that bear the seal of the TAB standard. The reports shall be accompanied by report forms and schematic drawings required by the TAB standard, AABC, TABB or NEBB.

c. Following all TAB work through its satisfactory completion.

d. Providing final markings of settings of all HVAC adjustment devices.

e. Permanently mark location of duct test ports.

f. Documenting critical paths from the fan or pump. These critical paths are ones in which are 100 percent open from the fan or pump to the terminal device. This will show the least amount of restriction is being imposed on the system by the TAB firm.

5. All TAB technicians performing actual TAB work shall be experienced and shall have done satisfactory work on a minimum of three (3) projects comparable in size and complexity to this project.

Qualifications shall be certified by the TAB agency in writing. The lead technician shall be certified by AABC, TABB or NEBB.

C. Test Equipment Criteria: The instrumentation shall meet the accuracy/calibration requirements established by AABC National

Standards, TABB/SMACNA International Standards, or by NEBB Procedural

Standard for Testing, Adjusting and Balancing of Environmental Systems and instrument manufacturer. Provide calibration history of the instruments to be used for test and balance purpose. All equipment shall remain in calibration, or be re-calibrated if certification expires, during the TAB procedures.

D. TAB Criteria:

1. One or more of the applicable AABC, NEBB, TABB or SMACNA publications, supplemented by Chapter 39, "Testing, Adjusting and

Balancing" of ASHRAE Handbook "HVAC Applications" and requirements stated herein shall be the basis for planning, procedures, and reports.

2. Flow Rate Tolerance: Following tolerances are allowed. For tolerances not mentioned herein follow Chapter 39, "Testing, Adjusting and Balancing" of ASHRAE Handbook "HVAC Applications" as a guideline. Air Filter resistance during tests, artificially imposed, if necessary, shall be at least 100 percent of manufacturer

23 05 93 - 6 recommended change over pressure drop values for pre-filters and after-filters.

a. Air handling unit and all other fans, cubic meters/min (cubic feet per minute): Minus 5 percent to plus l0 percent.

b. Air Terminal Units (maximum values): Minus 5 percent to plus l0 percent

c. Exhaust Hoods/Cabinets: 0 percent to plus l0 percent.

d. Minimum Outside Air: 0 percent to plus 10 percent.

e. Individual room air outlets and inlets, and air flow rates not mentioned above: Minus 5 percent to plus l0 percent except if the air to air space is 100 CFM or less the tolerance will be minus 5 to plus 5 percent.

f. Heating Hot Water Pumps and Hot Water Coils: Minus 5 percent to plus 5 percent.

g. Chilled Water and Condenser Water Pumps: Minus 5 percent to plus

5 percent.

h. Chilled Water Coils: Minus 5 percent to plus 5 percent.

3. Systems shall be adjusted for energy efficient operation as described in PART 3.

4. Typical TAB procedures and critical path results shall be demonstrated to the COR for one air distribution system (including all fans, 3 terminal units, 3 rooms randomly selected by the COR, one of which shall be a critical path) and 1 hydronic system (pumps and 3 coils) as follows:

a. When field TAB work begins.

b. During each partial final inspection and the final inspection for the project if requested by VA.

PART 2 - PRODUCTS

2.1 PLUGS

A. Provide plastic plugs to seal holes drilled in ductwork for test purposes.

2.2 INSULATION REPAIR MATERIAL

A. See Section 23 07 11, HVAC and BOILER PLANT INSULATION. Provide for repair of insulation removed or damaged for TAB work.

PART 3 - EXECUTION

3.1 GENERAL

A. Refer to TAB Criteria in Paragraph QUALITY ASSURANCE.

23 05 93 - 7

B. Obtain applicable contract documents and copies of approved submittals for HVAC equipment and automatic control systems.

3.2 DESIGN REVIEW REPORT

A. The TAB Specialist shall review the contract documents and advise the

COR of any design deficiencies that would prevent the HVAC systems from effectively operating in accordance with the sequence of operation specified or prevent the effective and accurate TAB of the system. The

TAB Specialist shall provide a report individually listing each deficiency and the corresponding proposed corrective action necessary for proper system operation.

3.3 SYSTEMS INSPECTION REPORT

A. Inspect equipment and installation for conformance with design.

B. The inspection and report shall be done after air distribution and hydronic equipment is onsite and duct and piping installation has begun, but well in advance of performance testing and balancing work.

The purpose of the inspection is to identify and report deviations from design and ensure that systems will be ready for TAB at the appropriate time.

C. Reports: Follow checklist format developed by AABC, NEBB or SMACNA

(TABB), supplemented by narrative comments, with emphasis on air-handling units and fans. Check for conformance with submittals.

Verify that diffuser and register sizes are correct. Check air terminal unit installation including their duct sizes and routing.

3.4 DUCT AIR LEAKAGE TEST REPORT

A. TAB Agency shall perform the leakage test as outlined in "Duct Leakage

Tests and Repairs" in Section 23 31 00, HVAC DUCTS and CASINGS for TAB agency’s role and responsibilities in witnessing, recording and reporting of deficiencies.

3.5 SYSTEM READINESS REPORT

A. The TAB Contractor shall measure existing air and water flow rates associated with existing systems utilized to serve renovated areas as indicated in the contract documents. Submit report of findings to COR.

B. Inspect each system to ensure that it is complete including installation and operation of controls. Submit report to COR in standard format and forms prepared and/or approved by the CxA.

C. Verify that all items such as ductwork piping, dampers, valves, ports, terminals, connectors, etc., that are required for TAB are installed.

Provide a report to the COR.

23 05 93 - 8

3.6 TAB REPORTS

A. Submit an intermediate report for 50 percent of systems and equipment tested and balanced to establish satisfactory test results.

B. The TAB Contractor shall provide raw data immediately in writing to the

COR if there is a problem in achieving intended results before submitting a formal report.

C. If over 20 percent of readings in the intermediate report fall outside the acceptable range, the TAB report shall be considered invalid and all contract TAB work shall be repeated after engineering and construction have been evaluated and re-submitted for approval at no additional cost to the owner.

D. Do not proceed with the remaining systems until intermediate report is approved by the COR.

3.7 TAB PROCEDURES

A. TAB shall be performed in accordance with the requirement of the

Standard under which TAB agency is certified by either AABC, TABB or

NEBB. Balancing shall be done proportionally to all applicable systems.

1. At least 1 trunk damper shall be 100 percent open.

2. At least 1 branch damper shall be 100 percent open per trunk.

3. At least 1 terminal device duct be 100 percent open per branch.

4. At least one hydronic balancing valve shall be 100 percent open per hydronic system.

B. General: During TAB all related system components shall be in full operation. Fan and pump rotation, motor loads and equipment vibration shall be checked and corrected as necessary before proceeding with TAB.

Set controls and/or block off parts of distribution systems to simulate design operation of variable volume air or water systems for test and balance work.

C. Coordinate TAB procedures with existing systems and any phased construction completion requirements for the project. Provide TAB reports for each phase of the project prior to partial final inspections of each phase of the project.

D. Allow 7 days’ time in construction schedule for TAB and submission of all reports for an organized and timely correction of deficiencies.

E. Air Balance and Equipment Test: Include air-handling units, fans, terminal units, fan coil units, room diffusers/outlets/inlets, computer

23 05 93 - 9 room AC units, and laboratory fume hoods and biological safety cabinets.

1. Artificially load air filters by partial blanking to produce static air pressure drop of manufacturer’s recommended pressure drop.

2. Adjust fan speeds to provide design air flow. V-belt drives, including fixed pitch pulley requirements, are specified in Section

23 05 11, COMMON WORK RESULTS FOR HVAC. Provide new drive sets as required to adjust fan speeds.

3. Test and balance systems in all specified modes of operation, including variable volume, economizer, and fire emergency modes.

Verify that dampers and other HVAC controls function properly.

4. Variable Air Volume (VAV) Systems:

a. Coordinate TAB, including system volumetric controls, with

Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

b. Section 23 36 00, AIR TERMINAL UNITS, specifies that maximum and minimum flow rates for air terminal units (ATU) be factory set.

Check and readjust ATU flow rates if necessary to meet design criteria. Balance air distribution from ATU on full cooling maximum scheduled cubic meters per minute (cubic feet per minute). Reset room thermostats and check ATU operation from maximum to minimum cooling, to the heating mode, and back to cooling. Record and report the heating coil leaving air temperature when the ATU is in the maximum heating mode. Record and report outdoor air flow rates under all operating conditions

(The test shall demonstrate that the minimum outdoor air ventilation rate shall remain constant under all operating conditions).

c. Adjust operating pressure control setpoint to maintain the design flow to each space with the lowest setpoint. Confirm static pressure reset is operational and functioning properly.

5. Record final measurements for air handling equipment performance data sheets.

6. Record final damper settings for all manual volume dampers.

F.

G. Water Balance and Equipment Test: Include circulating pumps, convertors, coils, coolers and condensers:

1.

23 05 93 - 10

2. Adjust flow rates for equipment. Set coils and evaporator to values on equipment submittals, if different from values in the contract documents.

3. Primary-Secondary (variable volume) Systems: Coordinate TAB with

Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC. Balance systems at design water flow and then verify that variable flow controls function as designed.

4. Record final measurements for hydronic equipment on performance data sheets. Include entering and leaving water temperatures for heating and cooling coils, and for convertors. Include entering and leaving air temperatures (DB/WB for cooling coils) for air-handling units and reheat coils. Make air and water temperature measurements at the same time.

5. On coils with automatic flow limiting valves (automatic balancing valves) measure and report Delta P across valve and measure Delta P across 100 percent open temperature control valve and using control valve CV calculate and report gpm.

6. Record final valve setting for all balancing valves.

3.8 VIBRATION TESTING

A. Furnish instruments and perform vibration measurements as specified in

Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT. Field vibration balancing is specified in Section 23 05 11, COMMON WORK RESULTS FOR HVAC. Provide measurements for all rotating

HVAC equipment of 373 watts (1/2 horsepower) and larger, including centrifugal/screw compressors, cooling towers, pumps, fans and motors.

B. Record initial measurements for each unit of equipment on test forms and submit a report to the COR. Where vibration readings exceed the allowable tolerance Contractor shall be directed to correct the problem. The TAB agency shall verify that the corrections are done and submit a final report to the COR.

3.9 SOUND TESTING

A. Perform and record required sound measurements in accordance with paragraph QUALITY ASSURANCE in Section 23 05 41, NOISE and VIBRATION

CONTROL FOR HVAC PIPING and EQUIPMENT.

1. Take readings in all rooms. The COR may designate the specific rooms to be tested.

2.

23 05 93 - 11

B. Take measurements with a calibrated sound level meter and octave band analyzer of the accuracy required by AABC, TABB or NEBB.

C. Sound reference levels, formulas and coefficients shall be according to

ASHRAE Handbook "HVAC Applications", Chapter 49, “Noise and Vibration

Control”.

D. Determine compliance with contract documents as follows:

1. When sound pressure levels are specified, including the NC Criteria in Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT:

a. Reduce the background noise as much as possible by shutting off unrelated audible equipment.

b. Measure octave band sound pressure levels with specified equipment "off."

c. Measure octave band sound pressure levels with specified equipment "on."

d. Use the DIFFERENCE in corresponding readings to determine the sound pressure due to equipment.

DIFFERENCE: 0 1 2 3 4 5 to 9 10 or More

FACTOR: 10 7 4 3 2 1 0

Sound pressure level due to equipment equals sound pressure level with equipment "on" minus FACTOR.

e. Plot octave bands of sound pressure level due to equipment for typical rooms on a graph which also shows noise criteria (NC) curves.

2. When sound power levels are specified:

a. Perform steps 1.a. through 1.d., as specified above.

b. For Indoor Equipment: Determine room attenuating effect, i.e., difference between sound power level and sound pressure level.

Determined sound power level will be the sum of sound pressure level due to equipment plus the room attenuating effect.

c. For Outdoor Equipment: Use directivity factor and distance from noise source to determine distance factor, i.e., difference between sound power level and sound pressure level. Measured sound power level will be the sum of sound pressure level due to equipment plus the distance factor. Use 9 meters (30 feet) for sound level location.

23 05 93 - 12

3. Where sound pressure levels are specified in terms of dB(A), as in

Section 23 65 00, COOLING TOWERS, measure sound levels using the "A" scale of meter. Single value readings will be used instead of octave band analysis.

E. Where measured sound levels exceed specified level, the installing contractor or equipment manufacturer shall take remedial action approved by the COR and the necessary sound tests shall be repeated.

F. Test readings for sound testing could go higher than 15 percent if determination is made by the COR based on the recorded sound data.

3.10 MARKING OF SETTINGS

A. Following approval of TAB Final Report, the setting of all HVAC adjustment devices including valves, splitters and dampers shall be permanently marked by the TAB Specialist so that adjustment can be restored if disturbed at any time. Style and colors used for markings shall be coordinated with the COR.

3.11 IDENTIFICATION OF TEST PORTS

A. The TAB Specialist shall permanently and legibly identify the location points of duct test ports. If the ductwork has exterior insulation, the identification shall be made on the exterior side of the insulation.

All penetrations through ductwork and ductwork insulation shall be sealed to prevent air leaks and maintain integrity of vapor barrier.

3.12 PHASING

A. Phased Projects: Testing and Balancing Work to follow project with areas shall be completed per the project phasing. Upon completion of the project all areas shall have been tested and balanced per the contract documents.

B. Existing Areas: Systems that serve areas outside of the project scope shall not be adversely affected. Measure existing parameters where shown to document system capacity.

3.13 CRITICAL FLOW PATH

A. Provide a documented critical path for all fluid flows. There shall be at least one (1) terminal device that can be traced back to the fan or pump where there is no damper or valves that are less than 100 percent open.

3.14

- - E N D - -

23 08 00 - 1

SECTION 23 08 00

COMMISSIONING OF HVAC SYSTEMS

A. The requirements of this Section apply to all sections of Division 23.

B. This project will have selected building systems commissioned. The complete list of equipment and systems to be commissioned is specified in Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS. The commissioning process, which the Contractor is responsible to execute, is defined in Section 01 91 00 GENERAL COMMISSIONING REQUIRMENTS. A

Commissioning Agent (CxA) appointed by the VA will manage the commissioning process.

1.2 RELATED WORK

A. Section 01 00 00 GENERAL REQUIREMENTS.

B. Section 01 33 23 SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

C. Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS.

D. Section 23 05 41 NOISE AND VIBRATION CONTROL for HVAC PIPING AND

EQUIPMENT.

E. Section 23 05 93 TESTING, ADJUSTING, AND BALANCING FOR HVAC.

F. Section 23 09 23 DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

1.3 SUMMARY

A. This Section includes requirements for commissioning the HVAC systems of the related subsystems and equipment. This Section supplements the general requirements specified in Section 01 91 00 GENERAL

COMMISSIONING REQUIREMENTS.

B. Refer to Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS for more details regarding processes and procedures as well as roles and responsibilities for all Commissioning Team members.

1.4 DEFINITIONS

A. Refer to Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS for definitions.

1.5 COMMISSIONED SYSTEMS

A. Commissioning of a system or systems specified in Division 23 is part of the construction process. Documentation and testing of these systems, as well as training of the VA’s Operation and Maintenance personnel in accordance with the requirements of Section 01 91 00

23 08 00 - 2

GENERAL COMMISSIONING REQUIREMENTS and of Division 23, is required in cooperation with the VA and the Commissioning Agent.

B. The Facility HVAC systems commissioning will include the systems listed in Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS.

1.6 SUBMITTALS

A. The commissioning process requires review of selected Submittals that pertain to the systems to be commissioned. The Commissioning Agent will provide a list of submittals that will be reviewed by the

Commissioning Agent. This list will be reviewed and approved by the VA prior to forwarding to the Contractor. Refer to Section 01 33 23 SHOP

DRAWINGS, PRODUCT DATA, and SAMPLES for further details.

B. The commissioning process requires Submittal review simultaneously with engineering review. Specific submittal requirements related to the commissioning process are specified in Section 01 91 00 GENERAL

COMMISSIONING REQUIREMENTS.

1.7 APPLICABLE PUBLICATIONS

A. The following publications form a part of this specification to the extent indicated by the reference thereto. In text the publications are referenced to by the acronym of the organization.

B. Department of Veterans Affairs (VA):

PG 18-10 2007...........Mission Critical Facilities - DRAFT

PG 18-10 2007...........Life-Safety Protected Facilities - DRAFT

C. American Society of Heating, Refrigerating and Air Conditioning

Engineers, Inc. (ASHRAE):

HANDBOOK 2019...........HVAC Applications ASHRAE Handbook, Chapter 39, Testing, Adjusting, and Balancing, Chapter 44, HVAC Commissioning and Chapter 49, Sound and

Vibration Control

HANDBOOK 2017...........HVAC Fundamentals ASHRAE Handbook, Chapter 8, Sound and Vibration

D. Associated Air Balance Council (AABC):

7th Edition 2016........AABC National Standards for Total System

Balance

E. National Environmental Balancing Bureau (NEBB):

9th Edition 2019........Procedural Standards for Testing, Adjusting, Balancing of Environmental Systems

3rd Edition 2015 .......Procedural Standards for the Measurement of

Sound and Vibration

23 08 00 - 3

2nd Edition 2019 ... Standard for Whole Building Technical

Commissioning of New Construction

F. Sheet Metal and Air Conditioning Contractors National Association

(SMACNA):

0062006.................HVAC Duct Construction Standard – Metal and

Flexible Duct

3rd Edition 2005 ... HVAC Systems Testing, Adjusting and Balancing

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION

3.1 CONSTRUCTION INSPECTIONS

A. Commissioning of HVAC systems will require inspection of individual elements of the HVAC systems construction throughout the construction period. The Contractor shall coordinate with the Commissioning Agent in accordance with Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS and the Commissioning plan to schedule HVAC systems inspections as required to support the Commissioning Process.

3.2 PRE-FUNCTIONAL CHECKLISTS

A. The Contractor shall complete Pre-Functional Checklists to verify systems, subsystems, and equipment installation is complete and systems are ready for Systems Functional Performance Testing. The

Commissioning Agent will prepare Pre-Functional Checklists to be used to document equipment installation. Refer to Sections 23 05 41 NOISE

AND VIBRATION CONTROL for HVAC PIPING AND EQUIPMENT, Section 23 05 93

TESTING, ADJUSTING, AND BALANCING FOR HVAC and Section 23 09 23 DIRECT-

DIGITAL CONTROL SYSTEM FOR HVAC requirements. The Contractor shall complete the checklists. Completed checklists shall be submitted to the VA and to the Commissioning Agent for review. The Commissioning

Agent may spot check a sample of completed checklists. If the

Commissioning Agent determines that the information provided on the checklist is not accurate, the Commissioning Agent will return the marked-up checklist to the Contractor for correction and resubmission.

If the Commissioning Agent determines that a significant number of completed checklists for similar equipment are not accurate, the

Commissioning Agent will select a broader sample of checklists for review. If the Commissioning Agent determines that a significant number of the broader sample of checklists is also inaccurate, all the checklists for the type of equipment will be returned to the Contractor for correction and resubmission. Refer to SECTION 01 91 00 GENERAL

23 08 00 - 4

COMMISSIONING REQUIREMENTS for submittal requirements for Pre-

Functional Checklists, Equipment Startup Reports, and other commissioning documents.

3.3 CONTRACTORS TESTS

A. Contractor tests as required by other sections of Division 23 shall be scheduled and documented in accordance with Section 01 00 00 GENERAL

REQUIREMENTS. All testing shall be incorporated into the project schedule. Contractor shall provide no less than 7 calendar days’ notice of testing. The Commissioning Agent will witness selected Contractor tests at the sole discretion of the Commissioning Agent. Contractor tests shall be completed prior to scheduling Systems Functional

Performance Testing.

3.4 SYSTEMS FUNCTIONAL PERFORMANCE TESTING:

A. The Commissioning Process includes Systems Functional Performance

Testing that is intended to test systems functional performance under steady state conditions, to test system reaction to changes in operating conditions, and system performance under emergency conditions. The Commissioning Agent will prepare detailed Systems

Functional Performance Test procedures for review and approval by the

Resident Engineer. The Contractor shall review and comment on the tests prior to approval. The Contractor shall provide the required labor, materials, and test equipment identified in the test procedure to perform the tests. The Commissioning Agent will witness and document the testing. The Contractor shall sign the test reports to verify tests were performed. See Section 01 91 00 GENERAL

COMMISSIONING REQUIREMENTS, for additional requirements.

3.5 TRAINING OF VA PERSONNEL

A. Training of the VA operation and maintenance personnel is required in cooperation with the Resident Engineer and Commissioning Agent.

Provide competent, factory authorized personnel to provide instruction to operation and maintenance personnel concerning the location, operation, and troubleshooting of the installed systems. Contractor shall submit training agendas and trainer resumes in accordance with the requirements of Section 01 91 00 GENERAL COMMISSIONING

REQUIREMENTS. The instruction shall be scheduled in coordination with the VA Resident Engineer after submission and approval of formal training plans. Refer to Section 01 91 00 GENERAL COMMISSIONING

23 08 00 - 5

REQUIREMENTS and Division 23 Sections for additional Contractor training requirements.

----- END -----

23 09 23 - 1

SECTION 23 09 23

DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC

General Contractor shall provide direct-digital control system(s) as indicated on the project documents, point list, interoperability tables, drawings and as described in these specifications. Include a complete and working direct-digital control system. Include all engineering, programming, configuration/setup hardware and software, controls and installation materials, installation labor, commissioning and startup, training, final project documentation and warranty.

1. The direct-digital control system(s) shall consist of high-speed, peer-to-peer network of DDC controllers, a control system server, all configuration and setup software and hardware devices, and an

Engineering Control Center. Provide a remote user using a standard

HTML 5 web browser to access the control system graphics and change adjustable setpoints with the proper password.

2. All new building controllers shall be native BACnet. All new BACnet workstations, controllers, devices and components shall be listed by

BACnet Testing Laboratories. All new BACnet workstations, controllers, devices and components shall be accessible using a

HTML5 Web browser interface. Browsers shall not require the use of an extension or add on software in order to access aforementioned workstations, controllers, devices, and components.

a. If used, gateways shall be BTL listed.

b. If used, gateways shall provide all object properties and read/write services shown on VA-approved interoperability schedules.

3. The work administered by this Section of the technical specifications shall include all labor, materials, special tools, equipment, enclosures, power supplies, software, software licenses, Project specific software configurations and database entries, interfaces, wiring, tubing, installation, labeling, engineering, calibration, documentation, submittals, testing, verification, training services, permits and licenses, transportation, shipping, handling, administration, supervision, management, insurance, 23 09 23 - 2

Warranty, specified services and any other items required for a complete and fully functional Controls System.

4. The control systems shall be designed such that each mechanical system shall operate under stand-alone mode. The A/E shall designate what each “mechanical systems” is composed of. The contractor administered by this Section of the technical specifications shall provide controllers for each mechanical system. In the event of a network communication failure, or the loss of any other controller, the control system shall continue to operate independently. Failure of the ECC shall have no effect on the field controllers, including those involved with global strategies.

5. The control system shall accommodate 1 Engineering Control Center(s) and the control system shall accommodate 5 web-based Users simultaneously, and the access to the system should be limited only by operator password.

Some products are furnished but not installed by the contractor administered by this Section of the technical specifications. The contractor administered by this Section of the technical specifications shall formally coordinate in writing and receive from other contractors formal acknowledgements in writing prior to submission the installation of the products. These products include but are not limited to the following:

1. Control valves.

2. Flow switches.

3. Flow meters.

4. Sensor wells and sockets in piping.

5. Terminal unit controllers.

Some products are installed but not furnished by the contractor administered by this Section of the technical specifications. The contractor administered by this Section of the technical specifications shall formally coordinate in writing and receive from other contractors formal acknowledgements in writing prior to submission the procurement of the products. These products include but are not limited to the following:

1. Factory-furnished accessory thermostats and sensors furnished with unitary equipment.

Some products are not provided by, but are nevertheless integrated with the work executed by, the contractor administered by this Section of the technical specifications. These products include but are not limited to the following:

23 09 23 - 3

1. Fire alarm systems. If zoned fire alarm is required by the project-specific requirements, this interface shall require multiple relays, which are provided and installed by the fire alarm system contractor, to be monitored.

2. Unitary HVAC equipment (rooftop air conditioning units, split systems, steam coils, humidifiers ) controls. These include:

a. Discharge temperature control.

b. Economizer control.

c. Flowrate control.

d. Setpoint reset.

e. Time of day indexing.

f. Status alarm.

3. Steam trap monitoring system: Monitoring and alarms shall be connected to the ECC via BACnet.

4. Variable frequency drives. These controls, if not native BACnet, will require a BACnet Gateway.

5. The following systems have limited control (as individually noted below) from the ECC:

a. Constant temperature rooms: temperature out of acceptable range and status alarms.

Responsibility Table:

Work/Item/System Furnish Install Low

Voltage

Wiring

Line

Power

Control system low voltage and communication wiring

23 09 23 23 09 23 23 09 23 N/A

LAN conduits and raceway 23 09 23 23 09 23 N/A N/A

Automatic dampers (not furnished with equipment)

23 09 23 23 N/A N/A

Automatic damper actuators 23 09 23 23 09 23 23 09 23 23 09 23

Manual valves 23 23 N/A N/A

Automatic valves 23 09 23 23 23 09 23 23 09 23

Pipe insertion devices and taps, flow and pressure stations.

23 23 N/A N/A

Thermowells 23 09 23 23 N/A N/A

Current Switches 23 09 23 23 09 23 23 09 23 N/A

Control Relays 23 09 23 23 09 23 23 09 23 N/A

23 09 23 - 4

Work/Item/System Furnish Install Low

Voltage

Wiring

Line

Power

Power distribution system monitoring interfaces

23 09 23 23 09 23 23 09 23 26

All control system nodes, equipment, housings, enclosures and panels.

23 09 23 23 09 23 23 09 23 26

Smoke detectors 28 31 00 28 31 00 28 31 00 28 31 00

Fire/Smoke Dampers 23 23 28 31 00 28 31 00

Smoke Dampers 23 23 28 31 00 28 31 00

Fire Dampers 23 23 N/A N/A

VFDs 23 26 23 09 23 26

Fire Alarm shutdown relay interlock wiring

28 28 28 26

Control system monitoring of fire alarm smoke control relay

28 28 23 09 23 28

Fire-fighter’s smoke control station (FSCS

28 28 28 28

Packaged RTU space-mounted controls (not furnished with equipment)

23 09 23 23 09 23 23 09 23 26

Packaged RTU unit-mounted controls (not furnished with equipment)

23 09 23 23 09 23 23 09 23 26

Starters, HOA switches 23 23 N/A 26

Steam Trap Monitoring in

Boiler Plant

23 21 11 23 21 11 26 26

Steam Trap Monitoring not in Boiler Plant

23 22 13 23 22 13 26 26

This facility’s existing direct-digital control (DDC) system is manufactured by // //, and its ECC is located at // //. The existing system’s top-end communications is via // //. The existing system’s ECC and controllers were installed in the year of 2010. The contractor administered by this Section of the technical specifications shall observe the capabilities, communication network, services, spare capacity of the existing control system and its ECC prior to beginning work.

23 09 23 - 5

a. The combined system shall operate and function as one complete system including one database of control point objects and global control logic capabilities. Facility operators shall have complete operations and control capability over all systems, new and existing including; monitoring, trending, graphing, scheduling, alarm management, global point sharing, global strategy deployment, graphical operations interface and custom reporting as specified.

2. Upgrade the existing direct-digital control system’s ECC to include all properties and services required by an ASHRAE Standard 135

BACnet B-AWS Profile. The upgraded ECC shall continue to communicate with the existing direct-digital control system’s devices. The upgraded ECC shall communicate directly with the new native-BACnet devices over the existing control system’s communications network without the use of a gateway. Provide programming converting the existing non-BACnet devices, objects and services to ASHRAE Standard

135 BACnet-complaint BIBBs. The contractor administered by this

Section of the technical specifications shall provide all necessary investigation and site-specific programming to execute the interoperability schedules.

a. The performance requirement for the combined system: the combined system shall operate and function as one complete system including one database of control point objects and global control logic capabilities. Facility operators shall have complete operations and control capability over all systems, new and existing including; monitoring, trending, graphing, scheduling, alarm management, global point sharing, global strategy deployment, graphical operations interface and custom reporting as specified.

3. Leave existing direct-digital control system intact and in place.

Provide a new ASHRAE Standard 135 BACnet-compliant ECC in the same room as the existing system’s ECC, and provide a new standalone

BACnet-compliant control system serving the work in this project. No interoperability is required.

This campus has standardized on an existing standard ASHRAE Standard

135, BACnet/IP Control System supported by a preselected controls service company. This entity is referred to as the “Control System Integrator” in this Section of the technical specifications. The Control system integrator

23 09 23 - 6 is responsible for ECC system graphics and expansion. It also prescribes control system-specific commissioning/ verification procedures to the contractor administered by this Section of the technical specification. It lastly provides limited assistance to the contractor administered by this

Section of the technical specification in its commissioning/verification work.

1. The General Contractor of this project shall directly hire the

Control System Integrator in a contract separate from the contract procuring the controls contractor administered by this Section of the technical specifications.

2. The contractor administered by this Section of the technical specifications shall coordinate all work with the Control System

Integrator. The contractor administered by this Section of the technical specifications shall integrate the ASHRAE Standard 135, BACnet/IP control network(s) with the Control System Integrator’s B-

AWS through an Ethernet connection provided by either the Control

System Integrator or VA.

3. The contractor administered by this Section of the technical specifications shall provide a peer-to-peer networked, stand-alone, distributed control system. This direct digital control (DDC) system at least shall include one portable operator terminal - laptop, one digital display unit, microprocessor-based controllers, instrumentation, end control devices, wiring, piping, software, and related systems. This contractor is responsible for all device mounting and wiring.

4. Responsibility Table:

Item/Task Section

23 09 23 contactor

Control system integrator

VA

ECC expansion X

ECC programming X

Devices, controllers, control panels and equipment

X

Point addressing: all hardware and software points including setpoint, calculated point, data point(analog/ binary), and reset schedule point

X

Point mapping X

Network Programming X

23 09 23 - 7

ECC Graphics X

Controller programming and sequences X

Integrity of LAN communications X

Electrical wiring X

Operator system training X

LAN connections to devices X

LAN connections to ECC X

IP addresses X

Overall system verification (Cx) X

Controller and system verification X

Unitary standalone systems including Unit Heaters, Cabinet Unit

Heaters, Fan Coil Units, Base Board Heaters, thermal comfort ventilation fans, and similar units for control of room environment conditions may be equipped with integral controls furnished and installed by the equipment manufacturer or field mounted. Refer to equipment specifications and as indicated in project documents. Application of standalone unitary controls is limited to at least those systems wherein remote monitoring, alarm and startup are not necessary. Examples of such systems include:

1. Light-switch-operated toilet exhaust

2. Vestibule heater

3. Exterior stair heater

4. Attic heating and ventilation

5. Mechanical or electrical room heating and ventilation.

The direct-digital control system shall start and stop equipment, move

(position) damper actuators and valve actuators, and vary speed of equipment to execute the mission of the control system. Use electricity as the motive force for all damper and valve actuators, unless use of pneumatics as motive force is specifically granted in writing by the VA.

1.2 RELATED WORK

Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS.

Section 13 21 29, Constant Temperature Rooms.

Section 23 22 13, Steam and Condensate Heating Piping.

Section 23 31 00, HVAC Ducts and Casings.

Section 23 74 13, Packaged, Outdoor, Central-Station Air-Handling

Units.

Section 23 84 00, Humidity Control Equipment.

Section 26 05 11, Requirements for Electrical Installations.

23 09 23 - 8

Section 26 05 21, Low-Voltage Electrical Power Conductors and Cables

(600 Volts and Below).

Section 26 05 26, Grounding and Bonding for Electrical Systems.

Section 26 05 33, Raceway and Boxes for Electrical Systems.

Section 26 27 26, Wiring Devices.

Section 26 29 11, Motor Starters.

Section 28 31 00, Fire Detection and Alarm.

1.3 DEFINITION

Algorithm: A logical procedure for solving a recurrent mathematical problem; A prescribed set of well-defined rules or processes for the solution of a problem in a finite number of steps.

Analog: A continuously varying signal value (e.g., temperature, current, velocity etc.

BACnet: A Data Communication Protocol for Building Automation and

Control Networks -as defined by ANSI/ASHRAE Standard 135. This communications protocol allows diverse building automation devices to communicate data and services over a network.

BACnet/IP: Annex J of Standard 135. It defines and allows for using a reserved UDP socket to transmit BACnet messages over IP networks. A BACnet/IP network is a collection of one or more IP sub-networks that share the same

BACnet network number.

BACnet Internetwork: Two or more BACnet networks connected with routers. The two networks may use different LAN technologies.

BACnet Network: One or more BACnet segments that have the same network address and are interconnected by bridges at the physical and data link layers.

BACnet Segment: One or more physical segments of BACnet devices on a

BACnet network, connected at the physical layer by repeaters.

BACnet Broadcast Management Device (BBMD): A communications device which broadcasts BACnet messages to all BACnet/IP devices and other BBMDs connected to the same BACnet/IP network.

BACnet Interoperability Building Blocks (BIBBs): BACnet

Interoperability Building Blocks (BIBBs) are collections of one or more

BACnet services. These are prescribed in terms of an "A" and a "B" device.

Both of these devices are nodes on a BACnet internetwork.

23 09 23 - 9

BACnet Testing Laboratories (BTL). The organization responsible for testing products for compliance with the BACnet standard, operated under the direction of BACnet International.

Baud: It is a signal change in a communication link. One signal change can represent one or more bits of information depending on type of transmission scheme. Simple peripheral communication is normally one bit per

Baud. (e.g., Baud rate = 78,000 Baud/sec is 78,000 bits/sec, if one signal change = 1 bit).

Binary: A two-state system where a high signal level represents an "ON" condition and an "OFF" condition is represented by a low signal level.

BMP or bmp: Suffix, computerized image file, used after the period in a

DOS-based computer file to show that the file is an image stored as a series of pixels.

Bus Topology: A network topology that physically interconnects workstations and network devices in parallel on a network segment.

Control Unit (CU): Generic term for any controlling unit, stand-alone, microprocessor based, digital controller residing on secondary LAN or Primary

LAN, used for local controls or global controls

Deadband: A temperature range over which no heating or cooling is supplied, i.e., 22-25 degrees C (72-78 degrees F), as opposed to a single point change over or overlap).

Device: a control system component that contains a BACnet Device Object and uses BACnet to communicate with other devices.

Device Object: Every BACnet device requires one Device Object, whose properties represent the network visible properties of that device. Every

Device Object requires a unique Object Identifier number on the BACnet internetwork. This number is often referred to as the device instance.

Device Profile: A specific group of services describing BACnet capabilities of a device, as defined in ASHRAE Standard 135, Annex L.

Standard device profiles include BACnet Operator Workstations (B-OWS), BACnet

Building Controllers (B-BC), BACnet Advanced Application Controllers (B-AAC), BACnet Application Specific Controllers (B-ASC), BACnet Smart Actuator (B-

SA), and BACnet Smart Sensor (B-SS). Each device used in new construction is required to have a PICS statement listing which service and BIBBs are supported by the device.

Diagnostic Program: A software test program, which is used to detect and report system or peripheral malfunctions and failures. Generally, this system is performed at the initial startup of the system.

23 09 23 - 10

Direct Digital Control (DDC): Microprocessor based control including

Analog/Digital conversion and program logic. A control loop or subsystem in which digital and analog information is received and processed by a microprocessor, and digital control signals are generated based on control algorithms and transmitted to field devices in order to achieve a set of predefined conditions.

Distributed Control System: A system in which the processing of system data is decentralized and control decisions can and are made at the subsystem level. System operational programs and information are provided to the remote subsystems and status is reported back to the Engineering Control Center.

Upon the loss of communication with the Engineering Control center, the subsystems shall be capable of operating in a stand-alone mode using the last best available data.

Download:…