FTEV12-1082_Retrocommission_HVAC_Multi_Bldgs.pdf

PROJECT # FTEV 12-1082 DATE: 31 MAY 2013

DEPARTMENT OF THE AIR FORCE

SPECIAL OPERATIONS COMMAND

1 SPECIAL OPERATIONS WING

NRG-RETROCOMMISSION HVAC

SYSTEMS, MULTI BLDGS

HURLBURT FIELD, FLORIDA

MS0612

I - 1

INDEX

DIVISION 01 GENERAL REQUIREMENTS

01 10 00 Summary of Work 01 33 00 Submittals 01 60 00 Material and Equipment

DIVISION 23 HEATING VENTILATING AND AIR CONDITIONING (HVAC)

23 05 00 Common Work Results for HVAC 23 05 93 Testing, Adjusting, and Balancing for HVAC 23 08 00 Retrocommissioning of HVAC 23 09 23 Direct Digital Control System for HVAC

END OF INDEX

01 10 00 - 1

SECTION 01 10 00: SUMMARY OF WORK

PART 1 GENERAL

1.01 WORK INCLUDED:

A. The contractor shall furnish all labor, materials, tools, supervision and equipment and perform all operations necessary to accomplish all work complete in place, as shown on the drawings, specified herein, or as needed to complete FTEV 12-1082 NRG-Retrocommission HVAC Systems, Multiple Buildings.

1.02 JOB DESCRIPTION:

A. The work to be performed includes, but is not necessarily limited to, the following principal features:

1. Retrocommission HVAC Systems in multiple buildings on base.

2. Evaluate total facility HVAC system condition and operability; conduct diagnostic testing, adjustment and rebalancing.

3. Verify operability of HVAC control systems, and Energy Management and Control System (EMCS);

tune, adjust, recalibrate and repair HVAC Controls and EMCS hardware and operation sequence as necessary.

4. Develop a retrocommissioning report that details HVAC condition, actions taken and recommends future repair, improvement and reinvestment requirements.

1.03 CONTRACTOR USE OF SITE AND PREMISES

A. Limit use of site to allow Owner visitation and inspection.

B. The contractor and subcontractors are permitted to use existing utilities available at the site. Use is subject to approval by the Contracting Officer. The 1 Special Operations Civil Engineering Squadron must approve all connections. Connection to existing water mains must utilize a backflow preventer, certified within the 12 months prior to use on base.

1.04 DISPOSAL

A. All scrap materials and debris shall be disposed of in an on- site dumpster. When full, it shall be emptied at a legally approved dumpsite off- base. It shall be the responsibility of the contractor to provide the dumpster and for the selection of the dumpsite. Provide Contracting Officer with name(s) of waste disposal company and approved dumpsite.

1.05 STORAGE AREA

A. Contractor lay-down/materials storage site shall be as shown on the drawings or as approved by the

Contracting Officer.

B. A minimum of a 6 foot high temporary visual barrier shall surround the area.

C. The area must be maintained in a reasonably clean manner. All empty boxes, paper and trash must be deposited in the on-site construction dumpster.

1.06 SAFETY

A. The pertinent sections of the following publications are applicable to all work on this project.

1. U.S. Army Corps of Engineers: EM 385-1-1, Safety and Health Requirements Manual.

2. Air Force Instruction (AFI) 91-202.

3. AFOSH Standard 48.139. See Specification Section 01 00 00 General Requirements paragraph

1.06.A.5.

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.01 INSPECTION

A. The contractor shall accomplish work in an orderly progression of steps to satisfy the performance requirements of this specification.

3.02 HOURS OF WORK

01 10 00 - 2

A. The normal hours of a workday shall be between 7:00 A.M. and 4:00 P.M., Monday through Friday, except holidays and observed holidays. The contractor may elect, at his option, to work hours other than normal duty hours if approved by the Contracting Officer. All work time, other than normal working days, shall be requested in writing, 3 days in advance.

3.03 QUALITY CONTROL

A. The contractor shall establish and maintain quality control to assure compliance with Contract Documents, and maintain records of his quality control for materials, equipment and construction operations.

END OF SECTION

01 33 00 - 1

SECTION 01 33 00: SUBMITTALS

PART l GENERAL

1.01 WORK INCLUDED:

A. Throughout the Contract Documents, the minimum acceptable quality of workmanship and materials has been defined by manufacturer's name and catalog number, reference to recognized industry and Government standards, or description of required attributes and performance.

B. Make all submittals required by the Contract Documents in a timely manner to allow construction of the building within the allotted performance time.

1. Long lead items such as pre-engineered metal building systems, electrical and mechanical systems, special equipment, etc. must be submitted within 15 days of Notice to Proceed.

2. All submittals must be made within 45 days of Notice to Proceed.

3. Late submittals that result in delayed delivery of materials and equipment, which will affect the completion and acceptance of the building by the government, will not be a justification for a time extension.

4. Revise, submit and/or resubmit (submittals) as necessary to establish compliance with the specified requirements.

1.02 QUALITY ASSURANCE:

A. Coordination of Submittals: Prior to each submittal, carefully review and coordinate all aspects of each item being submitted and verify that each item and the submittal for it conforms in all respects with the requirements of the Contract Documents. By affixing his signature to each submittal, the contractor certifies that this coordination and verification has been performed.

B. Certificates of Compliance:

1. Certify that all materials used in the work comply with all specified provisions thereof. Certification shall not be construed as relieving the contractor from furnishing satisfactory materials if, after tests are performed on selected samples' the material is found to not meet specific requirements.

2. Show on each certification the name and location of the work, name and address of contractor, quantity and date or dates of shipment or delivery to which the certificate applies, and name of the manufacturing or fabricating company. An officer of the manufacturing or fabrication company shall sign certificates.

3. In addition to the above information, all laboratory test reports submitted with Certificates of Compliance shall show the date or dates of testing, the specified requirements for which testing was performed, and results of the test or tests.

PART 2 PRODUCTS

2.01 SHOP DRAWINGS AND COORDINATION DRAWINGS:

A. Shop Drawings: Make all shop Drawings accurately to a scale sufficiently large to show all pertinent aspects of the item and its method of connection to the work.

2.02 MANUFACTURER'S LITERATURE:

A. Where contents of submitted literature from manufacturers includes data not pertinent to the submittal, clearly indicate which portion of the contents is being submitted for review.

PART 3 EXECUTION

3.01 IDENTIFICATION OF SUBMITTALS:

A. General: Consecutively number all submittals.

B. Internal Identifications: On at least the first page of each copy of each submittal and elsewhere as required for positive identification, clearly indicate the submittal number in which the item was included.

C. Indicate FTEV Number, Project Title and Contract Number

01 33 00 - 2

3.02 COORDINATION OF SUBMITTALS:

A. General: Prior to submittal for approval, use all means necessary to fully coordinate all material including, but not necessarily limited to:

1. Determine and verify all interface conditions, catalog numbers and similar data.

2. Coordinate with other trades as required.

3. Clearly indicate all deviations from requirements of the Contract Documents.

B. Grouping of submittals: Unless otherwise specified, make all submittals in groups containing all associated items to ensure that information is available for checking each item when it is received. Partial submittals will be rejected as not complying with the provisions of the Contract Documents and the contractor shall be strictly liable for all delays so occasioned.

C. Interior Finish Materials/Colors/Samples: All interior finish materials/colors/samples, includIng but not limited to, flooring, base, paint/stain, wall coverings, acoustic ceiling/suspension system, acoustical treatment, window treatment, laminated plastic for base/wall cabinets/countertops, interior signage, etc., shall be submitted as a group (one submittal) to allow the government to review/approve/disapprove and select/coordinate the interior finish materials/colors prior to being incorporated into the work. Upon receipt of the government's approved selections, the contractor shall provide the government with actual samples of each item for the record, minimum size 4"x4", except laminate plastic chips shall be manufacturer's standard size.

D. Exterior Finish Materials/Colors/Samples: All exterior finish materials/colors/samples, including but not limited to, brick, concrete masonry, exterior insulation finish system, stucco, paint/stain, roofing/flashing, exterior signage, pavers, windows, doors, etc., shall be submitted as a group (one submittal) to allow the government to review/approve/disapprove and /select/coordinate the exterior finish materials/colors prior to being incorporated into the work. Upon receipt of the government's approved selections, the contractor shall provide the government with actual samples of each item for the record, minimum size 4"x4".

3.03 SUBMITTAL APPROVAL:

A. General: Approval by the Contracting Officer shall not be construed as a complete check, but only that the general method of construction and detailing is satisfactory. Review and approval by government shall not relieve the contractor from responsibility for errors that may exist, or from liability for failure to comply with the intent of the Contract Documents.

B. Revisions After Approval: When a submittal has been approved, a re-submittal by the contractor for the purpose of substitution of materials or equipment, will not be considered unless accompanied by an acceptable explanation as to why the substitution is necessary.

C. Unnecessary Submissions: When the contractor elects to provide the materials, equipment, etc., that was used as the basis for the design and is the exact: Manufacture's name, catalog number, size, and finish as shown in the drawings or specified herein, no submittal is required. The contractor however shall submit a letter to the Contracting Officer stating that he will use the specified product. All field-testing associated with the material or equipment, etc. must be performed and submitted to the Contracting Officer for approval.

3.04 SCHEDULE OF MATERIAL SUBMITTALS.

A. Assign numbers to these items to be submitted, beginning with the number 1 and continuing through the last submittal. Items that are disapproved and require resubmittal shall be numbered with the original submittal number followed by R1 if the first resubmittal of the item, R2 if the second resubmittal, and so on, until final approval is given.

PROJECT NO. PROJECT TITLE SOLICITATION/CONTRACT #

SCHEDULE OF MATERIAL SUBMITTALS

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REMARKS

23 05 93 Test Adjusting & Balancing 4

23 08 00 Commissioning 4 4

23 09 23 Direct Digital Systems for HVAC 4 4 4 2 4

01 60 00 - 1

SECTION 01 60 00 MATERIAL AND EQUIPMENT

1.01 PRODUCTS

A. Products means new material, machinery, components, equipment, fixtures and systems forming the

Work. Does not include machinery and equipment used for preparation, fabrication, conveying and erection of the work. Products may also include existing materials or components required for reuse.

B. Do not use materials and equipment removed from existing premises except as specifically permitted by the Contract Documents and approved by the Contracting Officer.

C. Provide interchangeable components of the same manufacturer for similar components.

1.02 TRANSPORTATION AND HANDLING:

A. Transport and handle products in accordance with manufacturer's instructions.

B. Promptly inspect shipments to assure that products comply with requirements, quantities are correct, and products are undamaged.

C. Provide equipment and personnel to handle products by methods to prevent soiling, disfigurement or damage.

1.03 STORAGE AND PROTECTION:

A. Store and protect products in accordance with manufacturer's instructions, with seals and labels intact and legible. Store sensitive products in weathertight, climate controlled enclosures.

B. For exterior storage of fabricated products, place on sloped supports above ground.

C. Cover products subject to deterioration with impervious sheet covering. Provide ventilation to avoid condensation.

D. Store loose granular materials on solid flat surfaces in a well-drained area. Prevent mixing with foreign matter.

E. Provide equipment and personnel to store products by methods to prevent soiling, disfigurement or damage.

F. Arrange storage of products to permit access for inspection. Periodically inspect to assure products are undamaged and are maintained under specified conditions.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

23 05 00 – 1

SECTION 23 05 00: COMMON WORK RESULTS FOR HVAC

1.01 SECTION INCLUDES

A. Basic Mechanical Requirements specifically applicable to Division 21, 22, and 23 Sections, in addition to

Division 1 - General Requirements.

1.02 WORK SEQUENCE

A. During the construction period coordinate mechanical schedule and operations with Prime contractor.

1.03 REGULATORY REQUIREMENTS

A. Conform to applicable Building Code for the state of Florida.

B. Fire Protection: Conform to NFPA.

C. Plumbing: Conform to International Plumbing Code.

D. The contractor shall perform all demolition, installation, inspection and maintenance of air conditioning equipment in accordance with the latest Environmental Protection Agency guidance, specifically Title IV of the Clean Air Act, Amendments Section 608.

E. All personnel servicing air conditioning equipment shall be certified in refrigerant recovery and recycling by a State of Florida authorized organization.

F. All equipment used in servicing air conditioning equipment shall be certified for refrigerant recovery and recycling by a State of Florida authorized organization.

G. Any servicing of air conditioning equipment must recover, and if possible, recycle all refrigerant. The only alternate to this is to recover and dispose of the refrigerant in accordance with the latest and most restrictive guidance from the Environmental Protection Agency or the Florida Department of Environmental Regulation.

1.04 GAS SERVICE

A. Where gas services are required it is the contractor’s responsibility to coordinate with local gas utility

(Okaloosa County Gas District). Any charges associate with gas services are the responsibility of the contractor.

1.05 TEST AND BALANCE/COMMISSIONING

A. The Mechanical Contractor shall provide the services of a third party, independent firm for Test and

Balance and Commissioning.

PART 3 EXECUTION (NOT USED)

23 05 93 – 1

SECTION 23 05 93: TESTING, ADJUSTING, AND BALANCING FOR HVAC

1.01 SECTION INCLUDES

A. Testing, adjustment, and balancing of air systems.

B. Testing, adjustment, and balancing of hydronic systems.

C. Measurement of final operating condition of HVAC systems.

D. Sound measurement of equipment operating conditions.

E. Vibration measurement of equipment operating conditions.

1.02 REFERENCES

A. AABC MN-1 - National Standards for Testing and Balancing Heating, Ventilating, and Air Conditioning

Systems.

B. ASHRAE 111 - Practices for Measurement, Testing, Adjusting and Balancing of Building Heating, Ventilation, Air-Conditioning and Refrigeration Systems.

C. NEBB - Procedural Standards for Testing, Balancing and Adjusting of Environmental Systems.

D. TABB - International Standards for Environmental Systems Balance.

1.03 SUBMITTALS

A. Submit name of adjusting and balancing agency for approval within 21 days after award of Contract.

B. Submit test and balance reports prior to the final inspection. Include full size drawing (24” x 36”) with test report indicating the location of all items tested as required.

C. Prior to commencing work, submit draft reports indicating adjusting, balancing, and equipment data required.

D. Submit draft copies of report for review prior to final acceptance of Project. Provide final copies for

Contracting Officer and for inclusion in operating and maintenance manuals.

E. Provide reports in soft cover, letter size, 3-ring binder manuals, complete with index page and indexing tabs, with cover identification at front and side. Include set of reduced drawings with air outlets and equipment identified to correspond with data sheets, and indicating thermostat locations.

F. Include detailed procedures, agenda, sample report forms, and copy of AABC National Project

Performance Guaranty prior to commencing system balance.

G. Submittals shall be made under provisions of Section 01 33 00.

H. Upon approval of the test and balance report, submit copy of the report in digital (MS Word or

Excel) format.

1.04 SCHEDULES

A. Equipment Requiring Testing, Adjusting, and Balancing:

1. HVAC Pumps.

2. Boilers.

3. Forced Air Furnaces.

4. Chillers.

5. Air Cooled Refrigerant Condensers.

6. Packaged Heating/Cooling Units.

7. Packaged Terminal Air Conditioning Units.

8. Unit Air Conditioners.

9. Computer Room Air Conditioning Units.

23 05 93 – 2

10. Air Coils.

11. Terminal Heat Transfer Units.

12. Unit Ventilators.

13. Fan Coil Units.

14. Air Handling Units.

15. Fans.

16. Air Terminal Units.

17. Air Inlets and Outlets.

18. Heat Exchangers.

1.05 REPORT FORMS

A. Submit reports on AABC National Standards for Total System Balance or NEBB forms.

B. Forms shall include the following information:

1. Title Page:

a. Company name (Test and balance contractor)

b. Company address

c. Company telephone number

d. Project name

e. Project location

f. Project Contractor (General contractor and Mechanical sub-contractor)

2. Instrument List:

a. Instrument

b. Manufacturer

c. Model

d. Serial number

e. Range

f. Calibration date

3. Air Moving Equipment:

a. Location

b. Manufacturer

c. Model

d. Air flow, specified and actual

e. Return air flow, specified and actual

f. Outside air flow, specified and actual

g. Total static pressure (total external), specified and actual

h. Inlet pressure

i. Discharge pressure

j. Fan RPM

4. Exhaust Fan Data:

a. Location

b. Manufacturer

c. Model

d. Air flow, specified and actual

e. Total static pressure (total external), specified and actual

f. Inlet pressure

g. Discharge pressure

h. Fan RPM

5. Return Air/Outside Air Data:

a. Identification/location

b. Design air flow

c. Actual air flow

d. Design return air flow

e. Actual return air flow

f. Design outside air flow

g. Actual outside air flow

h. Return air temperature

i. Outside air temperature

j. Required mixed air temperature

k. Actual mixed air temperature

l. Design outside/return air ratio

m. Actual outside/return air ratio

23 05 93 – 3

6. Electric Motors:

a. Manufacturer

b. HP/BHP

c. Phase, voltage, amperage; nameplate, actual, no load.

d. RPM

e. Service factor

f. Starter size, rating, heater elements

7. V-Belt Drive:

a. Identification/location

b. Required driven RPM

c. Driven sheave, diameter and RPM

d. Belt, size and quantity

e. Motor sheave, diameter and RPM

f. Center to center distance, maximum, minimum, and actual

8. Duct Traverse:

a. System zone/branch

b. Duct size

c. Area

d. Design velocity

e. Design air flow

f. Test velocity

g. Test air flow

h. Duct static pressure

i. Air temperature

j. Air correction factor

9. Air Monitoring Station Data:

a. Identification/location

b. System

c. Size

d. Area

e. Design velocity

f. Design air flow

g. Test velocity

h. Test air flow

10. Air Distribution Test Sheet:

a. Air terminal number

b. Room number/location

c. Terminal type

d. Terminal size

e. Area factor

f. Design velocity

g. Design air flow

h. Test (final) velocity

i. Test (final) air flow

j. Percent of design air flow

11. Terminal Unit Data:

a. Manufacturer

b. Type, constant, variable, single, dual duct

c. Identification/number

d. Location

e. Model

f. Size

g. Minimum static pressure

h. Minimum design air flow

i. Maximum design air flow

j. Maximum actual air flow

k. Inlet static pressure

12. Pump Data:

a. Identification/number

b. Manufacturer

c. Size/model

d. Impeller

23 05 93 – 4

e. Service

f. Design flow rate, pressure drop, BHP

g. Actual flow rate, pressure drop, BHP

h. Discharge pressure

i. Suction pressure

j. Total operating head pressure

k. Shut off, discharge and suction pressures

l. Shut off, total head pressure

13. Air Cooled Chillers:

a. Identification/number

b. Manufacturer

c. Capacity

d. Model

e. Evaporator entering water temperature, design and actual

f. Evaporator leaving water temperature, design and actual

g. Evaporator pressure drop, design and actual

h. Evaporator water flow rate, design and actual

i. Condenser entering water temperature, design and actual

j. Condenser leaving water temperature, design and actual

k. Condenser pressure drop, design and actual

l. Condenser water flow rate, design and actual

14. Cooling Coil Data:

a. Identification/number

b. Location

c. Service

d. Manufacturer

e. Air flow, design and actual

f. Entering air DB temperature, design and actual

g. Entering air WB temperature, design and actual

h. Leaving air DB temperature, design and actual

i. Leaving air WB temperature, design and actual

j. Water flow, design and actual

k. Water pressure drop, design and actual

l. Entering water temperature, design and actual

m. Leaving water temperature, design and actual

n. Air pressure drop, design and actual

15. Heating Coil Data:

a. Identification/number

b. Location

c. Service

d. Manufacturer

e. Air flow, design and actual

f. Water flow, design and actual

g. Water pressure drop, design and actual

h. Entering water temperature, design and actual

i. Leaving water temperature, design and actual

j. Entering air temperature, design and actual

k. Leaving air temperature, design and actual

l. Air pressure drop, design and actual

16. Flow Measuring Station:

a. Identification/station

b. Location

c. Size

d. Manufacturer

e. Model

f. Design flow rate

g. Design pressure drop

h. Actual/final pressure drop

i. Actual/final flow rate

j. Station calibrated setting

17. Duct Leak Test:

a. Description of ductwork under test

23 05 93 – 5

b. Duct design operating pressure

c. Duct design test static pressure

d. Duct capacity, air flow

e. Maximum allowable leakage duct capacity times leak factor

f. Test apparatus

1) Blower

2) Orifice, tube size

3) Orifice size

4) Calibrated

g. Test static pressure

h. Test orifice differential pressure

i. Leakage

18. Combustion Test:

a. Manufacturer

b. Model number

c. Serial number

d. Firing rate

e. Overfire draft

f. Gas meter timing dial size

g. Gas meter time per revolution

h. Gas pressure at meter outlet

i. Gas flow rate

j. Heat input

k. Burner manifold gas pressure

l. Percent carbon monoxide (CO)

m. Percent carbon dioxide (CO2)

n. Percent oxygen (O2)

o. Percent excess air

p. Flue gas temperature at outlet

q. Ambient temperature

r. Net stack temperature

s. Percent stack loss

t. Percent combustion efficiency

u. Heat output

19. Air Cooled Condenser:

a. Identification/number

b. Location

c. Manufacturer

d. Model number

e. Serial number

f. Entering DB air temperature, design and actual

g. Leaving DB air temperature, design and actual

h. Number of compressors

20. Electric Heater:

a. Manufacturer

b. Identification/number

c. Location

d. Model number

e. Design kW

f. Number of stages

g. Phase, voltage, amperage

h. Test voltage (each phase)

i. Test amperage (each phase)

j. Air flow, specified and actual

k. Temperature rise, specified and actual

21. Unit Ventilator and Fan Coil Data:

a. Manufacturer

b. Identification/number

c. Location

d. Model number

e. Size

f. Air flow, design and actual

23 05 93 – 6

g. Water flow, design and actual

h. Water pressure drop, design and actual

i. Entering water temperature, design and actual

j. Leaving water temperature, design and actual

k. Entering air temperature, design and actual

l. Leaving air temperature, design and actual

1.06 PROJECT RECORD DOCUMENTS

A. Submit record documents.

B. Accurately record actual locations of balancing valves and rough setting.

1.07 QUALITY ASSURANCE

A. Agency shall be company specializing in the adjusting and balancing of systems specified in this Section with minimum three years documented experience and certified by AABC MN-1. Perform Work under supervision of AABC Certified Test and Balance Engineer or NEBB Certified Testing, Balancing and Adjusting Supervisor. All documentation shall be signed by a registered Professional Engineer.

B. Total system balance shall be performed in accordance with AABC MN-1 or NEBB Procedural Standards for Testing, Balancing and Adjusting of Environmental Systems.

1.08 SEQUENCING AND SCHEDULING

A. Sequence work to commence after completion of systems and schedule completion of work before

Substantial Completion of Project.

B. No modifications shall be performed on any factory supplied systems without written approval of the

Government. The Contractor shall notify the Contracting Officer is system modification is required above standard procedure and practice.

3.01 EXAMINATION

A. Before commencing work, verify that systems are complete and operable. Ensure the following:

1. Equipment is operable and in a safe and normal condition.

2. Temperature control systems are installed complete and operable.

3. Proper thermal overload protection is in place for electrical equipment.

4. Final filters are clean and in place. If required, install temporary media in addition to final filters.

5. Duct systems are clean of debris.

6. Correct fan rotation.

7. Fire and volume dampers are in place and open.

8. Coil fins have been cleaned and combed.

9. Access doors are closed and duct end caps are in place.

10. Air outlets are installed and connected.

11. Duct system leakage has been minimized.

12. Hydronic systems have been flushed, filled, and vented.

13. Correct pump rotation.

14. Proper strainer baskets are clean and in place.

15. Service and balance valves are open.

B. Report any defects or deficiencies noted during performance of services to Contracting Officer.

C. Promptly report abnormal conditions in mechanical systems or conditions which prevent system balance.

D. If, for design reasons, system cannot be properly balanced, report as soon as observed.

E. Beginning of work means acceptance of existing conditions.

3.02 PREPARATION

23 05 93 – 7

A. Provide instruments required for testing, adjusting, and balancing operations. Make instruments available to Base Civil Engineering (BCE) to facilitate spot checks during testing.

B. Provide additional balancing devices as required.

3.03 INSTALLATION TOLERANCES

A. Adjust air handling systems to plus or minus 5 percent for supply systems and plus or minus 10 percent for return and exhaust systems from figures indicated.

B. Adjust hydronic systems to plus or minus 10 percent of design conditions indicated.

3.04 ADJUSTING

A. Recorded data shall represent actually measured, or observed condition.

B. Permanently mark settings of valves, dampers, and other adjustment devices allowing settings to be restored. Set and lock memory stops.

C. After adjustment, take measurements to verify balance has not been disrupted or that such disruption has been rectified.

D. Leave systems in proper working order, replacing belt guards, closing access doors, closing doors to electrical switch boxes, and restoring thermostats to specified settings.

E. At final inspection, recheck random selections of data recorded in report. Recheck points or areas as selected and witnessed by the Owner.

F. Check and adjust systems approximately six months after final acceptance and submit report.

3.05 AIR SYSTEM PROCEDURE

A. Adjust air handling and distribution systems to provide required or design supply, return, and exhaust air quantities.

B. Make air quantity measurements in ducts by Pitot tube traverse of entire cross sectional area of duct.

C. Measure air quantities at air inlets and outlets.

D. Adjust distribution system to obtain uniform space temperatures free from objectionable drafts and noise.

E. Use volume control devices to regulate air quantities only to extent that adjustments do not create objectionable air motion or sound levels. Effect volume control by duct internal devices such as dampers and splitters.

F. Vary total system air quantities by adjustment of fan speeds. Provide drive changes required. Vary branch air quantities by damper regulation.

G. Provide system schematic with required and actual air quantities recorded at each outlet or inlet.

H. Measure static air pressure conditions on air supply units, including filter and coil pressure drops, and total pressure across the fan. Make allowances for 50 percent loading of filters.

I. Adjust outside air automatic dampers, outside air, return air, and exhaust dampers for design conditions.

J. Measure temperature conditions across outside air, return air, and exhaust dampers to check leakage.

K. Where modulating dampers are provided, take measurements and balance at extreme conditions.

Balance variable volume systems at maximum air flow rate, full cooling, and at minimum air flow rate, full heating.

L. Measure building static pressure and adjust supply, return, and exhaust air systems to provide required relationship between each to maintain approximately 0.05 inches positive static pressure.

M. For variable air volume system powered units set volume controller to air flow setting indicated. Confirm

23 05 93 – 8 connections properly made and confirm proper operation for automatic variable air volume temperature control.

3.06 WATER SYSTEM PROCEDURE

A. Adjust water systems to provide required or design quantities.

B. Use calibrated Venturi tubes, orifices, or other metered fittings and pressure gages to determine flow rates for system balance. Where flow metering devices are not installed, base flow balance on temperature difference across various heat transfer elements in the system.

C. Adjust systems to provide specified pressure drops and flows through heat transfer elements prior to thermal testing. Perform balancing by measurement of temperature differential in conjunction with air balancing.

D. Effect system balance with automatic control valves fully open to heat transfer elements.

E. Effect adjustment of water distribution systems by means of balancing cocks, valves, and fittings. Do not use service or shut-off valves for balancing unless indexed for balance point.

F. Where available pump capacity is less than total flow requirements or individual system parts, full flow in one part may be simulated by temporary restriction of flow to other parts.

3.07 COMMISSIONING

A. The commissioning procedures shall be performed as required.

23 08 00‐1

SECTION 23 08 00 - RETROCOMMISSIONING OF HVAC

Introduction: This project involves retro-commissioning of existing HVAC systems and controls in several buildings on the base. The intent of the retro-commissioning effort is to bring each building’s operation back to design condition in order for them to operate more efficiently; optimize control systems; improve building performance by saving energy and reducing operating costs; identifying and resolving system problems; and increase occupant comfort and indoor air quality.

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings, specifications, and general provisions of the Contract, including General and Supplementary Conditions and other Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes retro-commissioning process requirements for HVAC&R systems, assemblies, and equipment.

1.3 DEFINITIONS

A. Commissioning: A systematic process of ensuring that all new equipment performs per manufacturer’s specifications and that the new systems interact with existing building systems and controls according to the design intent and the owner’s operational needs. The commissioning process shall encompass and coordinate the traditionally separate functions of system documentation, equipment startup, control system calibrations, testing and balancing, performance testing and training.

B. Commissioning Plan: A document that outlines the organization, schedule, allocation of resources, and documentation requirements of the commissioning process.

C. CA: Commissioning Authority.

D. CM: Construction Manager

E. GC: General Contractor

F. HVAC&R: Heating, Ventilating, Air Conditioning, and Refrigeration.

G. PM: Project Manager

H. Retro-commissioning: A systematic process of ensuring that all existing building systems perform interactively according to the design intent and the owner’s operational needs. The process identifies and documents deficiencies in systems and equipment with a goal of improving the performance of an existing building’s equipment and systems in order to reduce building energy consumption and operating costs. The process identifies improvements to a building’s operation and maintenance (O&M) procedures to enhance overall building performance.

I. Systems, Subsystems, Equipment, and Components: Where these terms are used together or separately, they shall mean "as-built" systems, subsystems, equipment, and components.

23 08 00‐2

1.4 RESPONSIBILITIES

A. COMMISSIONING AUTHORITY’S (CA) RESPONSIBILITIES

1. The CA is not responsible for design concept, design criteria, compliance with codes, design or general construction scheduling, cost estimating, or construction management. The CA may assist with problem-solving non-conformance or deficiencies. The primary role of the CA is to develop and coordinate the execution of a testing plan, perform the tasks outlined in the testing plan, and observe and document performance – that systems are functioning in accordance with the documented design intent and in accordance with the Contract Documents.

2. Coordinate and direct the commissioning activities in a logical, sequential and efficient manner using consistent protocols and forms, centralized documentation, clear and regular communications and consultations with all necessary parties, frequently updated timelines and schedules and technical expertise.

3. Coordinate the commissioning work and, with the GC and PM, ensure that commissioning activities are being scheduled into the master schedule.

4. Perform site visits, as necessary, to become familiar with existing component and system installations.

5. The CA shall notify the PM & CM of and obtain permission for any potential interruption to facility normal or emergency operations.

6. Maintain a master deficiency log and a separate testing record. Provide the CM with written progress reports and test results with recommended actions.

7. Compile and maintain a commissioning record and building systems book.

8. Provide a final commissioning report.

1.5 RETRO-COMMISSIONING PROCESS

A. The CA shall present a Retro-Commissioning Plan to be approved by the owner, and once approved, reviewed with the commissioning team members. The plan shall include a list of commissioning team members who will represent the CA in the commissioning process. Team members should be designated to fulfill the responsibilities of the CA as outlined above. The CM & PM and Government representative must be notified of the execution of all checks and tests, such that they have the opportunity to witness the work at their discretion.

B. Meetings will be arranged by the CA to plan, scope, coordinate, and schedule future activities and resolve problems.

C. Equipment documentation shall be provided to the CA if requested and available.

D. The Retro-Commissioning Plan shall include equipment specific retro-commissioning checks and system functional performance test procedures.

E. During the retro-commissioning checks or functional performance tests the CA team may make minor adjustments and corrective action as necessary to perform the work.

F. If during the retro-commissioning checks or functional performance tests the CA team determines an existing field device requires repair or replacement due to equipment failure, the CA shall notify the CM & PM in writing of the failure. The CA shall not repair or replace the device without written approval of the

PM.

G. The CA shall provide completed retro-commissioning checklists and functional performance test

23 08 00‐3 checklists organized by system and subsystem submitted as the final retro-commissioning test report.

1.6 SYSTEMS TO BE RETRO-COMMISSIONED

A. See the attached drawings. In general equipment includes hot water boilers, air handling units, VAV boxes, exhaust fans, fan coil units, DX system, pumps, chillers, infrared heating systems, unit heaters and control system components.

1.7 COMMISSIONING AGENT QUALIFICATIONS

A. Commissioning Firm

Provide a Commissioning Firm that is either a member of ACG or certified by the NEBB or the TABB and certified in all categories and functions where measurements or performance are specified on the plans and specifications. The certification shall be maintained for the entire duration of duties specified herein.

If, for any reason, the firm loses subject certification during this period, immediately notify the Contracting Officer and submit another Commissioning Firm for approval. Any firm that has been the subject of disciplinary action by the ACG, the NEBB, or the TABB within the five years preceding Contract Award is not eligible to perform any duties related to the HVAC systems, including Commissioning. All work specified in this Section and in other related Sections to be performed by the Commissioning Firm shall be considered invalid if the Commissioning Firm loses its certification prior to Contract completion and must be performed by an approved successor. These Commissioning services are to assist the prime Contractor in performing the quality oversight for which it is responsible. The Commissioning Firm shall be a subcontractor of the prime Contractor and shall be financially and corporately independent of all other sub-contractors. The Commissioning Firm shall report to and be paid by the prime Contractor.

Provide certification of the proposed Commissioning Firm's qualifications by one of the following ACG, NEBB, or TABB to perform the duties specified herein no later than 21 days after the Notice to Proceed.

Include in the documentation the date that the Certification was initially granted and the date when the current Certification expires. Any lapses in Certification of the proposed Commissioning Firm or disciplinary action taken by ACG, NEBB, or TABB against the proposed Commissioning Firm shall be described in detail.

B. Commissioning Specialist The Commissioning Specialist shall be an ACG Certified Commissioning Agent, a NEBB Qualified Commissioning Administrator, or a TABB Certified Commissioning Supervisor and shall be an employee of the approved Commissioning Firm. The certification shall be maintained for the entire duration of duties specified herein. If, for any reason, the Commissioning Specialist loses subject certification during this period, immediately notify the Contracting Officer and submit another Commissioning Specialist for approval. Any individual that has been the subject of disciplinary action by the ACG, the NEBB, or the TABB within the five years preceding Contract Award is not eligible to perform any duties related to the HVAC systems, including Commissioning. All work specified in this Section and in other related Sections performed by the Commissioning Specialist shall be considered invalid if the Commissioning Specialist loses his certification prior to Contract completion and must be performed by the approved successor.

Provide certification of the proposed Commissioning Specialist's qualifications by one of the following ACG, NEBB, or TABB to perform the duties specified herein no later than 21 days after the Notice to Proceed. The documentation shall include the date that the Certification was initially granted and the date when the current Certification expires. Any lapses in Certification of the proposed Commissioning Specialist or disciplinary action taken by ACG, NEBB, or TABB against the proposed Commissioning Specialist shall be described in detail.

1.8 COMMISSIONING SUBMITTALS

A. Draft Forms: Submit draft of system verification form and functional performance test checklists.

23 08 00‐4

B. Test Reports: Indicate data on system verification form for each piece of equipment and system as specified.

Use AABC forms as guidelines.

C. Field Reports: Indicate deficiencies preventing completion of equipment or system verification checks equipment or system to achieve specified performance.

1.9 CLOSEOUT SUBMITTALS

A. Project Record Documents: Update as-built drawings and submit in AutoCAD format.

1.10 QUALITY ASSURANCE

A. Perform Work in accordance with AABC requirements.

B. Maintain one copy of each document on site.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 GENERAL RETRO-COMMISSIONING REQUIREMENTS

A. Chillers:

Commissioning agent shall verify the following:

1. The chilled water supply water temperature is maintained at set point.

2. The chiller operates on a call for chilled water.

3. The associated chilled water pump(s) start and stop per the controls sequence.

4. The chilled water pump(s) GPM.

B. Boilers:

Commissioning agent shall verify the following:

1. Proper operation of the boiler and the ability to maintain hot water supply set point.

2. The hot water reset schedule shall be verified to ensure proper setback based on outside air temperatures. Boiler lockout temperatures will be verified where necessary.

3. The associated hot water pump(s) start and stop per the controls sequence.

4. The hot water pump(s) GPM

C. Air Handlers:

1. Operation of all outside air and return air dampers and damper actuators.

2. The control valves shall be verified to be opening and closing fully with respect to the control points (temperature).

3. Supply and outside air flows shall be measured at maximum fan speed.

4. Pressure drops across coil and filter banks shall be measured at maximum fan speed.

D. Terminal Units:

1. All dampers and damper actuators operate properly between full open and close per the control sequence.

2. Heating coil control valves open and close fully, or resistance heating is energized, per the control sequence.

E. Controls:

23 09 23 – 1

SECTION 23 09 23: DIRECT DIGITAL CONTROL SYSTEM FOR HVAC

1.01 WORK INCLUDED

A. Direct Digital Control (DDC) Systems for HVAC Systems.

B. Software.

1.02 REFERENCES

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

A. AIR-MOVEMENT AND CONTROL ASSN, INC (AMCA)

AMCA 500 - Test Methods for Louvers, Dampers and Shutters

B. AMERICAN NATIONAL STANDARDS INSTITUTE, INC (ANSI)

ANSI B40.1 -Gauges-Pressure Indicating Dial Type-Elastic Element

C. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

1. ASTM A 269 -Seamless and Welded Austenitic Stainless Steel Tubing for General Service

2. ASTM B 88 - Seamless Copper Water Tube

3. ASTM D 635 Rate of Burning and/or Extent of Time of Burning of Self-Supporting Plastics in a

Horizontal Position

3. ASTM D 1693 - Environmental Stress-Cracking of Ethylene Plastics

D. FEDERAL COMMUNICATIONS COMMISSION (FCC)

FCC Part 15 - (Vol II) Radio Frequency Devices

E. FEDERAL SPECIFICATIONS (FS)

FS GG-T-321 - (Rev D; Am 2) Thermometers, Self-Indicating Liquid-in-Glass for Machinery and Piping

Systems

F. INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC (IEEE)

IEEE No. 587 - Guide for Surge Voltage in Low Voltage AC Power Circuits

G. NATIONAL ELECTRICAL MANUFACTURERS ASSN (NEMA)

NEMA 250 - Enclosures for Electrical Equipment Incl Rev 1 (1000 Volts Maximum)

H. UNDERWRITERS LABORATORIES, INC (UL)

1. UL 94 - Test for Flammability of Plastic Materials for Parts in Devices and Appliances

2. UL 916 - Energy Management Equipment

1.03 GENERAL REQUIREMENTS

A. Standard Products: Material and equipment shall be standard products of a manufacturer regularly engaged in the manufacturing of such products, which are of a similar material, design and workmanship.

The standard products shall have been in a satisfactory commercial or industrial use for 2 years prior to bid opening. The 2-year use shall include applications of equipment and materials under similar circumstances and of similar size. The 2 years experience must be satisfactorily completed by a product which has been sold or is offered for sale on the commercial market through advertisements, manufacturers' catalogs, or brochures. Products having less than a 2-year field service record will be acceptable if a certified record of satisfactory field operation, for not less than 6000 hours exclusive of the manufacturer's factory tests, can be shown. The equipment items shall be supported by a service organization. The Contractor shall submit a certified list of qualified permanent service organizations and qualifications. These service organizations shall be reasonably convenient to the equipment on a regular and emergency basis during the warranty period of the contract.

B. Identical Items: Items of the same classification as specified in PART 2 - PRODUCTS shall be identical, including equipment, assemblies, parts, and components.

C. Nameplates, Lens Caps, and Tags: Nameplates and lens caps bearing legends as shown and tags bearing device unique identifiers as shown shall have engraved or stamped characters. Nameplates

23 09 23 – 2 shall be mechanically attached to HVAC control panel interior doors. A plastic or metal tag shall be mechanically attached directly to each field-mounted device or attached by a metal chain or wire. Each air flow measurement station shall have a tag showing flow rate range for signal output range, duct size, and identifier as shown.

D. Verification of Dimensions: The Contractor shall become familiar with all details of the work, shall verify all dimensions in the field, and shall advise the Contracting Officer of any discrepancy before performing any work.

E. Drawings: Because of the small scale of the drawings, it is not possible to indicate all offsets, fittings, and accessories that may be required. The Contractor shall carefully investigate the mechanical, electrical, and finish conditions that could affect the work to be performed, shall arrange such work accordingly, and shall furnish all work necessary to meet such conditions.

F. Power-Line Surge Protection: All equipment connected to ac circuits shall be protected from power-line surges. Equipment protection shall meet the requirements of IEEE No. 587. Fuses shall not be used for surge protection.

G. System Support: The contractor shall provide 1 year of system support for all hardware in the control system at no additional cost to the building owner. System support shall include trouble-shooting, calibration, hardware replacement and other required services to maintain fully functioning, calibrated HVAC control systems. The system support service shall be available 5 days per week between 9 am and 4 pm. During the 1 year system support period, the contractor shall maintain a duplicate set of HVAC control drawings. At the owner's option, control problems will be solved by verbal instruction or on-site correction by the contractor. The number of system support calls and site visits shall be unlimited during the 1 year support period.

1.04 SUBMITTALS

A. Submit shop drawings and product data.

B. Detail Drawings

1. Detail drawings shall be submitted. Detail drawings shall include: a drawing index; a list of symbols;

a series of drawings for each HVAC control system using abbreviations, symbols, nomenclature and identifiers as shown on the contract drawings; valve schedules; damper schedules; and a compressed-air station schematic on 34-inch by 22-inch sheets. Detail drawings shall also include:

equipment data, product specific catalog cuts, and an ASME air-storage tank certificate. All detail drawings shall be delivered together as a complete submittal. Valve and damper schedules may be submitted in advance but shall be included in the complete submittal.

2. Each control-system element on a drawing shall have a unique identifier as shown.

3. Each series of drawings for an HVAC control system shall include a schematic as shown, a ladder diagram as shown, an equipment schedule as shown, a wiring diagram, a list of equipment with manufacturer and model number, a control-panel arrangement drawing, and an HVAC control-system sequence of operation.

4. The wiring diagram shall show the interconnection of conductors and cables to HVAC control-panel terminal blocks and to the identified terminals of starters and packaged equipment, with all necessary jumpers and ground connections. The wiring diagram shall show the labels of all conductors. All sources of power required for HVAC control systems and for packaged-equipment control systems shall be identified back to the panel board circuit breaker number, HVAC system control panel, magnetic starter, or packaged control equipment circuit. Each power supply and transformer not integral to a controller, starter, or packaged equipment shall be shown. The connected volt-ampere load and the power supply volt-ampere rating shall be shown.

5. The HVAC control-panel arrangement drawing shall show nameplate legends, fabrication details, and enclosure operating temperature-rise calculations. Fabrication details shall include interior door front and rear views, back panel layout and terminal block layout.

6. The sequence of operation for each HVAC control system shall be in the language and format shown on the drawings. No operational deviations from specified sequences will be permitted without prior written approval of the Contracting Officer. The sequence of operation shall refer to each device by its unique identifier.

7. The valve schedule shall include each valve's unique identifier, size,…