final 23 05 93 Testing Adjusting and Balancing.pdf

OFFUTT AIR FORCE BASE

(092036) 23 05 93-1 (Repair AHU O-Club, B462)

2010 by FEI

SECTION 23 05 93

TESTING, ADJUSTING AND BALANCING

PART 1 - GENERAL

1.1 WORK INCLUDED

A. Extent of testing, adjusting and balancing work required by this section is indicated on drawings and schedules, and by requirements of this section; and is defined to include, but is not necessarily limited to, air distribution systems, hydronic distribution systems, and associated equipment and apparatus of mechanical work. The work consists of setting speed and volume (flow) adjusting facilities provided for systems, recording data, conducting tests, preparing and submitting reports, and recommending modifications to work as required by Contract Documents.

B. Component types of testing, adjusting and balancing specified in this section includes the following as applied to mechanical equipment:

1. Air Distribution Systems:

a. Fans.

b. Diffuser, registers and grilles.

c. Air handling units.

2. Hydronic Systems:

a. Coils.

b. Piping systems.

1.2 QUALITY ASSURANCE

A. Tester's Qualifications: Firm certified by National Environmental Balancing Bureau (NEBB) in those testing and balancing disciplines similar to those required for this Project and may also be the original

Installer of system to be tested.

B. Codes and Standards:

1. NEBB Compliance: Comply with NEBB's "Procedural Standards for Testing, Adjusting, and

Balancing of Environmental Systems" as applicable to mechanical air hydronic distribution systems and associated equipment and apparatus.

2. Industry Standards: Comply with ASHRAE recommendations pertaining to measurements, instruments, and testing, adjusting and balancing, except as otherwise indicated.

1.3 SUBMITTALS

A. Submit certified test reports signed by Test and Balance Supervisor who performed TAB work. In addition, have report certified by Professional Engineer who is familiar with TAB work and also with

Project, and who is registered in jurisdiction where testing is being conducted.

B. Include identification and types of instruments used, and their most recent calibration date with submission of final test report.

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C. Submit biographical data on Engineer who is to directly supervise testing, adjusting and balancing work.

D. Maintenance Data: Include in maintenance manuals, copies of certified test reports, identification of instruments and data on Engineer.

1.4 JOB CONDITIONS

A. Do not proceed with testing, adjusting, and balancing work until work has been completed and is operable. Ensure that there is not latent residual work still to be completed.

B. Do not proceed until work scheduled for testing, adjusting, and balancing is clean and free from debris, dirt and discarded building materials.

PART 2 - PRODUCTS

2.1 ACCEPTABLE VENDORS

A. Vendors: Subject to compliance with requirements, provide testing, adjusting and balancing work by one (1) of the following:

1. Air & Fluid Management, Wilbur, NE.

2. Balcon, Omaha, NE.

3. Systems Management and Balancing, Inc., Omaha, NE.

4. Waldinger, Omaha, NE.

2.2 PATCHING MATERIALS

A. Except as otherwise indicated, use same products as used by original Installer for patching holes in insulation, ductwork and housings which have been cut or drilled for test purposes, including access for test instruments, attaching jigs and similar purposes.

1. At Tester's option, plastic plugs with retainers may be used to patch drilled holes in ductwork and housings.

2.3 TEST INSTRUMENTS

A. Utilize test instruments and equipment for TAB work required, of type, precision, and capacity as recommended in the following TAB Standards:

1. NEBB's Procedural Standards for Testing, Adjusting, and Balancing of Environmental

Systems.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine installed work and conditions under which testing is to be done to ensure that work has been completed, cleaned and is operable. Do not proceed with TAB work until unsatisfactory conditions have been corrected in a manner acceptable to Tester.

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3.2 AIR SYSTEM TESTING, ADJUSTING AND BALANCING

A. Test, adjust and balance environmental systems and components, as indicated, in accordance with procedures outlined in applicable standards, with the following minimum requirements.

B. Make the following test, adjustments and recordings:

1. Test and adjust supply and return fans. Adjust rotation and RPM to design requirements.

2. Test and record terminal voltages after above adjustments.

3. Test and record fan motor full load amperes after above adjustments.

4. Make Pitot Tube Traverse at main supply and return ducts. Obtain design CFM at fans.

5. Test and adjust system static pressures; suction and discharge.

6. Test and adjust each diffuser, grille, and register to within 10% of design requirements. Adjust to minimize drafts in all areas. Readings and tests shall include required FPM velocity and test resultant FPM velocity, required CFM and test resultant CFM after adjustments.

7. Adjust automatically operated dampers to operate as specified, indicated, and/or noted. The testing agency shall check controls for proper calibrations and list the controls requiring adjustments by Control Installers.

8. Change dampers or add dampers as required for correct balance, as recommended by the Air

Balancing Agency, at no additional cost to the Owner.

3.3 WATER SYSTEM TESTING, ADJUSTING AND BALANCING

A. Test, adjust and balance environmental systems and components, as indicated, in accordance with procedures outlined in applicable standards, with the following minimum requirements.

B. Preliminary checks, settings and adjustments shall be as follows:

1. Check pump rotation.

2. Check expansion tanks to determine that they are not air bound and the system is completely full of water.

3. Check air vents at high points of water systems and determine that all are installed and operating freely.

C. Phase I - Water systems testing and balancing procedures shall be as follows:

1. Set hot water pumps to the proper gallon per minute delivery.

2. Proceed to balance each radiation zone and hot water coil.

3. Mark settings on valves and record data upon the completion of flow readings and adjustments at coils.

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D. Phase II - Water systems testing and balancing procedures shall be as follows:

1. Recheck settings at the pumps and re-adjust, if required, after adjustments are made to each radiation zone and coil.

2. Check and record the following items at each cooling and heating element:

a. Inlet water temperatures.

b. Leaving water temperatures.

c. Pressure drop of each coil.

d. GPM at each pump, coil, and radiation zone.

e. Pump operating suction and discharge pressure and final total dynamic head.

f. List mechanical specifications of pumps.

g. Rated and actual running amperage of pump motor.

h. Check control valves for operation from full open to full closed.

3.4 SEASONAL CONSIDERATIONS

A. Test, adjust and balance system during summer season for air conditioning systems and during winter season for heating systems, including at least period of operation at outside conditions within 5 o F wet bulb temperature of maximum summer design condition, and within 10 o F dry bulb temperature of minimum winter design condition. When seasonal operation does not permit measuring final temperatures, then take final temperature readings when seasonal operation does permit.

3.5 CLOSEOUT PROCEDURES

A. Prepare report of test results, including instrumentation calibration reports, in format recommended by applicable standards.

B. Patch holes in insulation, ductwork and housings, which have been cut or drilled for test purposes, in a manner recommended by original Installer.

C. Mark equipment settings, including damper control positions, valve indicators, fan speed control levers and similar controls and devices, to show final settings at completion of TAB work. Provide markings with paint or other suitable permanent identification materials.

D. Prepare a report of recommendations for correcting unsatisfactory mechanical performances when system cannot be successfully balanced; including, where necessary, modifications which exceed requirements of Contract Documents for mechanical work.

E. Retest, adjust and balance systems subsequent to significant system modifications and resubmit test results.

END OF SECTION