southern company hangar architect's no. 15012...

Southern Company Hangar Architect's No. 15012Building Renovations 04/24/2015

SECTION 15993 - TESTING, ADJUSTING, AND BALANCING

PART 1 - GENERAL

1.01 DESCRIPTION OF WORK:

A. This section specifies the requirements and procedures for total mechanicalsystems testing, adjusting, and balancing (T/A/B) as required to meet designspecifications, plus recording and reporting the results.

1.02 SUMMARY:

A. Prior to acceptance and before final inspection, test and balance the air systemsas listed herein and as specified hereinafter and submit reports as specifiedhereinafter.

B. The mechanical contractor has numerous responsibilities associated with thetest and balance, it is imperative that the test and balance contractor coordinatethese responsibilities with them.

C. Test, adjust, and balance the following mechanical systems:

1. Supply air systems, all pressure ranges;2. Return air systems;3. Exhaust air systems;4. Verify temperature control system operation.

D. This Section does not include:

1. Testing boilers and pressure vessels for compliance with safety codes;

2. Specifications for materials for patching mechanical systems;

3. Specifications for materials and installation of adjusting and balancingdevices. If devices must be added to achieve proper adjusting andbalancing, refer to the respective system sections for materials andinstallation requirements.

1.03 CODES AND STANDARDS:

A. Applicable publications: The following publications form a part of thisspecification, to the extent that they represent minimum standards. Where thisspecification exceeds these standards, this specification shall be followed.

B. Associated Air Balance Council (AABC) National Standards or Field

TESTING, ADJUSTING, AND BALANCING 15993 -1


Measurement and Instrumentation, latest edition.

C. American Society of Heating, Refrigerating, and Air Conditioning Engineers(ASHRAE) Handbook - Fundamentals, latest edition.

D. Chapters on Testing, Adjusting, and Balancing of Environmental Systems andRelated Subjects, ASHRAE Handbook - Systems, latest edition.

E. National Environmental Balancing Bureau (NEBB)

F. Procedural Standards for Testing, Adjusting, and Balancing of EnvironmentalSystems, latest edition.

G. Sheet Metal and Air Conditioning Contractor's National Association (SMACNA)HVAC System - Testing, Adjusting and Balancing, latest edition.

1.04 QUALIFICATIONS FOR TEST AND BALANCE CONTRACTOR:

A. The test and balance contractor shall be an independent contractor thatregularly performs air systems testing and balancing. Minimum qualifications foracceptance shall be general membership in NEBB or AABC, except thataffiliation with manufacturers, installing, contractors, or engineering firms maynot preclude acceptance.

B. Supervisor directly in charge of the air testing and balancing work shall be aregistered professional engineer, in the state where the project is located, withnot less than five (5) years experience in the mechanical contracting industryand not less than two (2) years experience in testing and balancing of heating,ventilating, and air conditioning systems. The supervisor shall stamp the titlepage of the test and balance report with his professional engineer's stamp.

C. The supervisor and the lead test and balance mechanic shall be certified as testand balance technicians by one or more of the following groups, AABC, NEBB,SMACNA, ASHRAE, or the Sheet Metal Workers Union.

D. Instrument calibration: Calibrate all instruments required for air and waterbalancing within a period of six months prior to their use on this project, perNEBB or AABC standards and the instrument manufacturers.

E. Tests shall be conducted in presence of the Architect-Engineer and/or theOwner or their representatives. Notify the Architect-Engineer and Owner inwriting five working days before the start of testing.

1.05 DEFINITIONS:



A. Adjust: To regulate flow rate and air patterns at the terminal equipment, suchas to increase or reduce fan speeds or adjust a damper.

B. Balance: To proportion flows within the distribution system, including sub-mains, branches, and terminals, according to design quantities.

C. Draft: A current of air, when referring to localized effect caused by one or morefactors of high air velocity, low ambient temperature, or direction of airflow,whereby more heat is withdrawn from a person's skin than is normallydissipated.

D. Procedure: An approach to and execution of a sequence of work operations toyield repeatable results.

E. Report Forms: Test data sheets for recording test data in logical order.

F. System Effect: A phenomenon that can create undesired or unpredictedconditions that cause reduced capacities in all or part of a system.

G. System Effect Factors: Allowances used to calculate a reduction of theperformance ratings of a fan when installed under conditions different fromthose presented when the fan was performance tested.

H. Terminal: A point where the controlled medium, such as fluid or energy, entersor leaves the distribution system.

I. Test: A procedure to determine quantitative performance of a system orequipment.

J. Testing, Adjusting, and Balancing Agent: The entity responsible for performingand reporting the testing, adjusting, and balancing procedures.

K. AABC: Associated Air Balance Council.

L. AMCA: Air Movement and Control Association.

M. ASHRAE: American Society of Heating, Refrigerating, and Air-ConditioningEngineers, Inc.

N. NEBB: National Environmental Balancing Bureau.

O. SMACNA: Sheet Metal and Air Conditioning Contractors' National Association.

1.06 SUBMITTALS:



A. Sample Report Forms: Submit 2 sets of sample testing, adjusting, andbalancing report forms.

B. Certified Testing, Adjusting, and Balancing Reports: Submit 8 copies of reportsprepared, as specified in this Section, on approved forms certified by thetesting, adjusting, and balancing Agent.

1.07 QUALITY ASSURANCE:

A. Agent Qualifications: Engage a testing, adjusting, and balancing agent certifiedby either AABC or NEBB.

B. Certification of Testing, Adjusting, and Balancing Reports: Certify the testing,adjusting, and balancing field data reports. This certification includes thefollowing:

1. Review field data reports to validate accuracy of data and to preparecertified testing, adjusting, and balancing reports

2. Certify that the testing, adjusting, and balancing team complied with theapproved testing, adjusting, and balancing plan and the proceduresspecified and referenced in this Specification.

C. Testing, Adjusting, and Balancing Reports: Use testing, adjusting, andbalancing Agent's standard forms approved by the Engineer.

D. Instrumentation Type, Quantity, and Accuracy: As described in AABC nationalstandards.

E. Instrumentation Calibration: Calibrate instruments at least every 6 months ormore frequently if required by the instrument manufacturer.

1.08 COORDINATION:

A. Coordinate the efforts of factory-authorized service representatives for systemsand equipment, HVAC controls installers, and other mechanics to operateHVAC systems and equipment to support and assist testing, adjusting, andbalancing activities.

B. Notice: Provide 7 days' advance notice for each test. Include scheduled testdates and times.

C. Perform testing, adjusting, and balancing after leakage and pressure tests on airdistribution systems have been satisfactorily completed.



PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3 .01 THE MECHANICAL CONTRACTOR’S RESPONSIBILITIES:

A. Furnish the test and balance contractor one complete set of acceptedequipment data and one complete set of accepted mechanical shop drawings.

B. The mechanical contractor shall be responsible for advising the test andbalance contractor of any change(s) made to the system(s) during theconstruction process.

C. Mechanical contractor shall provide drawings, specifications, shop drawings,control diagrams, etc. detailing the change(s) to the test and balance contractor.

D. Replace and/or install pulleys, belts and dampers as required for the correctbalance as directed by the test and balance contractor.

E. Existing air systems having variable pitch pulleys shall have them replaced withfixed pitched pulleys prior to final; acceptance. Belts and pulleys shall beprovided as directed by test and balance contractor.

F. Allocate time in the construction schedule for test and balance procedure.

G. Assist the test and balance contractor in coordinating work with the other trades.

H. Place all systems and necessary allied devices required, and only thoserequired, for each working day of the testing and balancing procedures into "FullCall" operation. At the completion of the testing and balancing procedures forthe day, the mechanical contractor shall return the systems to normal operationor shut them down.

I. Prepare the air side system for testing and balancing as follows, (all new andexisting devices are included):

1. Mechanically check all rotating air devices, to insure that the devices arecapable of operation under normal design modes and have correctrotation and the related automatic controls are functional and calibrated.

2. All balancing, splitter, volume, fire and smoke control dampers shall be intheir respective neutral position or fully open. All locking devices shall befunctional and secured.



3. All air distribution inlet and outlet devices (i.e., grilles, registers, diffusers,and etc.) shall be fully open. All locking devices shall be functional andsecured.

4. All automatic controls (i.e., direct digital, electronic, electric, pneumatic,and/or any combination thereof) shall be mechanically and electricallychecked and be available to operate under design conditions.

5. Air control locking devices (i.e., control rods, quadrants, and etc.) shallbe permanently marked to represent the true position of their respectivecontrol surfaces. The locking devices markings shall be inconspicuousin occupied areas.

6. Install new air filters before the start of testing and as directed by the testand balance contractor in order to meet design conditions of the airhandling devices. Provide air control devices, such as balancingdampers, as per the drawings and specifications, and as directed by thetest and balance contractor in order to obtain the proper balanceconditions.

3 .02 EXAMINATION:

A. Examine Contract Documents to become familiar with project requirements andto discover conditions in systems' designs that may preclude proper testing,adjusting, and balancing of systems and equipment.

1. Contract Documents are defined in the General and SupplementaryConditions of the Contract.

2. Verify that balancing devices are installed as required by the ContractDocuments. Verify that quantities and locations of these balancingdevices are accessible and appropriate for effective balancing and forefficient system and equipment operation.

B. Examine approved submittal data of HVAC systems and equipment.

C. Examine equipment performance data, including fan curves. Relateperformance data to project conditions and requirements, including systemeffects that can create undesired or unpredicted conditions that cause reducedcapacities in all or part of a system. Calculate system effect factors to reducethe performance ratings of HVAC equipment when installed under conditionsdifferent from those presented when the equipment was performance tested atthe factory. To calculate system effects for air systems, use tables and chartsfound in AMCA 201, "Fans and Systems," Sections 7 through 10; or inSMACNA's "HVAC Systems--Duct Design," Sections 5 and 6. Compare this



data with the design data and installed conditions.

D. Examine system and equipment installations to verify that they are completeand that testing, cleaning, adjusting, and commissioning specified in individualSpecification Sections have been performed.

E. Examine system and equipment test reports.

F. Examine systems for functional deficiencies that cannot be corrected byadjusting and balancing.

G. Examine air-handling equipment to ensure clean filters have been installed,bearings are greased, belts are aligned and tight, and equipment withfunctioning controls is ready for operation.

H. Examine plenum ceilings, utilized for return air, to verify the air path is adequateand unobstucted.

I. Examine heat-transfer coils for correct piping connections and for clean andstraight fins.

J. Examine equipment for installation and for properly operating safety interlocksand controls.

K. Examine automatic temperature system components to verify the following:

1. Dampers and other controlled devices operate by the intendedcontroller.

2. Dampers are in the position indicated by the controller.

3. Integrity of dampers for free and full operation and for tightness of fullyclosed and fully open positions.

4. Automatic modulating and shutoff valves are properly connected.

5. Control devices are located to avoid adverse effects of sunlight, drafts,and cold walls.

6. Sensors are located to sense only the intended conditions.

7. Sequence of operation for control modes is according to the ContractDocuments.

8. Controller set points are set at design values. Observe and record



system reactions to changes in conditions. Record default set points ifdifferent from design values.

9. Interlocked systems are operating.

10. Changeover from heating to cooling mode occurs according to designvalues.

L. Report deficiencies discovered before and during performance of testing,adjusting, and balancing procedures.

3 .03 PREPARATION:

A. Prepare a testing, adjusting, and balancing plan that includes strategies andstep-by-step procedures.

B. Complete system readiness checks and prepare system readiness reports. Verify the following:

1. Permanent electrical power wiring is complete.

2. Automatic temperature-control systems are operational.

3. Equipment and duct access doors are securely closed.

4. Balance, smoke, and fire dampers are open.

5. Ceilings are installed in critical areas where air-pattern adjustments arerequired and access to balancing devices is provided.

6. Windows and doors can be closed so design conditions for systemoperations can be met.

3 .04 GENERAL TESTING AND BALANCING PROCEDURES:

A. Perform testing and balancing procedures on each system according to theprocedures contained in 2011 ASHRAE Applications Handbook Chapter 38,AABC or NEBB national standards and this Section.

B. Cut insulation, ducts,, and equipment cabinets for installation of test probes tothe minimum extent necessary to allow adequate performance of procedures. After testing and balancing, close probe holes and patch insulation with newmaterials identical to those removed. Restore vapor barrier and finish accordingto the insulation Specifications for this Project.



C. Mark equipment settings with paint or other suitable, permanent identificationmaterial, including damper-control positions, fan-speed-control levers, andsimilar controls and devices, to show final settings.

3 .05 FUNDAMENTAL AIR SYSTEMS' BALANCING PROCEDURES:

A. Prepare test reports for both fans and outlets. Obtain manufacturer's outletfactors and recommended testing procedures. Crosscheck the summation ofrequired outlet volumes with required fan volumes.

B. Prepare schematic diagrams of systems' "as-built" duct layouts.

C. Determine the best locations in main and branch ducts for accurate duct airflowmeasurements.

D. Check the airflow patterns from the outside-air louvers and dampers and thereturn- and exhaust-air dampers, through the supply-fan discharge and mixingdampers.

E. Locate start-stop and disconnect switches, electrical interlocks, and motorstarters.

F. Verify that motor starters are equipped with properly sized thermal protection.

G. Check dampers for proper position to achieve desired airflow path.

H. Check for airflow blockages.

I. Check condensate drains for proper connections and functioning.

J. Check for proper sealing of air-handling unit components.

3 .06 CONSTANT-VOLUME AIR SYSTEMS' BALANCING PROCEDURES:

A. Adjust fans to deliver total design airflow within the maximum allowable rpmlisted by the fan manufacturer.

1. Measure fan static pressures to determine actual static pressure asfollows:

a. Measure outlet static pressure as far downstream from the fan aspracticable and upstream from restrictions in ducts such aselbows and transitions.

b. Measure static pressure directly at the fan outlet or through the



flexible connection.

c. Measure inlet static pressure of single-inlet fans in the inlet ductas near the fan as possible, upstream from flexible connectionand downstream from duct restrictions.

d. Measure inlet static pressure of double-inlet fans through the wallof the plenum that houses the fan.

2. Measure static pressure across each air-handling unit component.

a. Simulate dirty filter operation and record the point at whichmaintenance personnel must change filters.

3. Measure static pressures entering and leaving other devices such assound traps under final balanced conditions.

4. Compare design data with installed conditions to determine variations indesign static pressures versus actual static pressures. The Contractorshall make recommended corrective changes to align design and actualconditions.

5. Adjust fan speed higher or lower than design, as necessary to attaindesign flow and pressure values. The Contractor shall make requiredreplacements or adjustments to pulleys and belts to accommodate fan-speed changes.

6. Do not make fan-speed adjustments that result in motor overload. Consult equipment manufacturers about fan-speed safety factors. Modulate dampers and measure fan-motor amperage to ensure nooverload will occur. Measure amperage in full cooling, full heating, andeconomizer modes to determine the maximum required brakehorsepower. The Contractor shall replace any equipment that does notperform as stated in the submitted product literature.

B. Adjust volume dampers for main duct, sub-main ducts, and major branch ductsto design airflows within specified tolerances.

1. Measure static pressure at a point downstream from the balancingdamper and adjust volume dampers until the proper static pressure isachieved.

a. Where sufficient space in sub-mains and branch ducts isunavailable for Pitot-tube traverse measurements, measureairflow at terminal outlets and inlets and calculate the total airflow



for that zone.

2. Remeasure each sub-main and branch duct, after all have beenadjusted. Continue to adjust sub-mains and branch ducts to designairflows within specified tolerances.

C. Measure terminal outlets and inlets without making adjustments.

1. Measure terminal outlets using a direct-reading hood or the outletmanufacturer's written instructions and calculating factors.

D. Adjust terminal outlets and inlets for each space to design airflows withinspecified tolerances of design values. Make adjustments using volumedampers rather than extractors and the dampers at the air terminals.

1. Adjust each outlet in the same room or space to within specifiedtolerances of design quantities without generating noise levels above thelimitations prescribed by the Contract Documents.

2. Adjust patterns of adjustable outlets for proper distribution without drafts.

3 .07 TEMPERATURE TESTING:

A. During testing, adjusting, and balancing, report need for adjustment intemperature regulation within the automatic temperature-control system.

B. Measure indoor wet- and dry-bulb temperatures every other hour for a period of2 successive 8-hour days, in each separately controlled zone, to provecorrectness of final temperature settings. Measure when the building or zone isoccupied.

C. Measure outside-air, wet- and dry-bulb temperatures.

3 .08 TEMPERATURE-CONTROL VERIFICATION:

A. Verify that controllers are calibrated and commissioned.

B. Check transmitter and controller locations and note conditions that wouldadversely affect control functions.

C. Record controller settings and note variances between set points and actualmeasurements.

D. Verify operation of limiting controllers (i.e., high- and low-temperaturecontrollers).



E. Verify free travel and proper operation of control devices such as damper andvalve operators.

F. Verify sequence of operation of control devices. Note the speed of response toinput changes.

G. Confirm interaction of interlock and lockout systems.

H. Record voltages of power supply and controller output. Determine if the systemoperates on a grounded or nongrounded power supply.

I. Note operation of electric actuators using spring return for proper fail-safeoperations.

3 .09 TOLERANCES:

A. Set HVAC system airflow and water flow rates within the following tolerances:

1. Supply, Return, and Exhaust Fans: Plus 5 to plus 10 percent.

2. Air Outlets and Inlets: 0 to minus 10 percent.

3 .010 INITIAL REPORTING:

A. Based on examination of the Contract Documents as specified in "Examination"Article above, prepare a report on the adequacy of design for systems'balancing devices. Recommend changes and additions to systems' balancingdevices to facilitate proper performance measuring and balancing. Recommendchanges and additions to HVAC systems and general construction to allowaccess for performance measuring and balancing devices.

B. As Work progresses, prepare reports to describe completed procedures,procedures in progress, and scheduled procedures. Include a list ofdeficiencies and problems found in systems being tested and balanced. Prepare a separate report for each system and each building floor for systemsserving multiple floors.

3 .011 FINAL REPORT:

A. General: Typewritten, or computer printout in letter-quality font, on standardbond paper, in 3-ring binder, tabulated and divided into sections by tested andbalanced systems. All data may not apply to all project devices, provide data asapplicable to the piece of equipment being tested.



B. Include a certification sheet in front of binder signed and sealed by the certifiedtesting and balancing engineer.

1. Include a list of the instruments used for procedures, along with proof ofcalibration.

C. Final Report Contents: In addition to the certified field report data, include thefollowing:

1. Fan curves.

2. Manufacturers' test data.

3. Field test reports prepared by system and equipment installers.

4. Other information relative to equipment performance, but do not includeapproved Shop Drawings and Product Data.

D. General Report Data: In addition to the form titles and entries, include thefollowing data in the final report, as applicable:

1. Title page.

2. Name and address of testing, adjusting, and balancing Agent.

3. Project name.

4. Project location.

5. Engineer's name and address.

6. Contractor's name and address.

7. Report date.

8. Signature of testing, adjusting, and balancing Agent who certifies thereport.

9. Summary of contents, including the following:

a. Design versus final performance.

b. Notable characteristics of systems.

c. Description of system operation sequence if it varies from the



Contract Documents.

10. Nomenclature sheets for each item of equipment.

11. Data for terminal units, including manufacturer, type size, and fittings.

12. Notes to explain why certain final data in the body of reports vary fromdesign values.

13. Test conditions for fans performance forms, including the following:

a. Settings for outside-, return-, and exhaust-air dampers.

b. Conditions of filters.

c. Cooling coil, wet- and dry-bulb conditions.

d. Fan drive settings, including settings and percentage of maximumpitch diameter.

e. Other system operating conditions that affect performance.

E. System Diagrams: Include schematic layouts of air distribution systems. Present with single-line diagrams and include the following:

1. Quantities of outside, supply, return, and exhaust airflows.

2. Duct, outlet, and inlet sizes.

3. Terminal units.

4. Balancing stations.

F. Air-Handling Unit Test Reports: For air-handling units with coils, include thefollowing:

1. Unit Data: Include the following:

a. Unit identification.

b. Location.

c. Make and type.

d. Model number and unit size.



e. Manufacturer's serial number.

f. Unit arrangement and class.

g. Discharge arrangement.

h. Sheave make, size in inches, and bore.

i. Sheave dimensions, center-to-center and amount of adjustmentsin inches.

j. Number of belts, make, and size.

k. Number of filters, type, and size.

2. Motor Data: Include the following:

a. Make and frame type and size.

b. Horsepower and rpm.

c. Volts, phase, and hertz.

d. Full-load amperage and service factor.

e. Sheave make, size in inches, and bore.

f. Sheave dimensions, center-to-center and amount of adjustmentsin inches.

3. Test Data: Include design and actual values for the following:

a. Total airflow rate in cfm.

b. Total system static pressure in inches wg.

c. Fan rpm.

d. Discharge static pressure in inches wg.

e. Filter static-pressure differential in inches wg.

f. Outside airflow in cfm.



g. Return airflow in cfm.

h. Outside-air damper position.

i. Return-air damper position.

G. Apparatus-Coil Test Reports: For apparatus coils, include the following asapplicable to the installed equipment:

1. Coil Data: Include the following:

a. System identification.

b. Location.

c. Coil type.

d. Face area in sq. ft.

e. Circuiting arrangement.


a. Airflow rate in cfm.

b. Average face velocity in fpm.

c. Air pressure drop in inches wg.

d. Outside-air, wet- and dry-bulb temperatures in deg F.

e. Return-air, wet- and dry-bulb temperatures in deg F.

f. Entering-air, wet- and dry-bulb temperatures in deg F.

g. Leaving-air, wet- and dry-bulb temperatures in deg F.

h. Refrigerant type.

i. Refrigerant suction pressure in psig.

j. Refrigerant suction temperature in deg F.

H. Electric-Coil Test Reports: For electric coils, include the following, whereapplicable:





b. Location.

c. Coil identification.

d. Capacity in kW.

e. Number of stages.

f. Connected volts, phase, and hertz.

g. Rated amperage.

h. Airflow rate in cfm.

i. Face area in sq. ft.

j. Minimum face velocity in fpm.


a. Heat output in kW.

b. Airflow rate in cfm.

c. Air velocity in fpm.

d. Entering-air temperature in deg F.

e. Leaving-air temperature in deg F.

f. Voltage at each connection.

g. Amperage for each phase.

I. Fan Test Reports: For supply, return, and exhaust fans, include the following:

1. Fan Data: Include the following:




b. Location.

c. Make and type.

d. Model number and size.

e. Manufacturer's serial number.

f. Arrangement and class.

g. Sheave make, size in mm, and bore.

h. Sheave dimensions, center-to-center and amount of adjustmentsin inches.

2. Motor Data: Include the following:

a. Make and frame type and size.

b. Horsepower and rpm.

c. Volts, phase, and hertz.

d. Full-load amperage and service factor.

e. Sheave make, size in inches, and bore.

f. Sheave dimensions, center-to-center and amount of adjustmentsin inches.

g. Number of belts, make, and size.


a. Total airflow rate in cfm.

b. Total system static pressure in inches wg.

c. Fan rpm.

d. Discharge static pressure in inches wg.

e. Suction static pressure in inches wg.

J. Round, Flat-Oval, and Rectangular Duct Traverse Reports: Include a diagram



with a grid representing the duct cross-section and record the following:

1. Report Data: Include the following:

a. System and air-handling unit number.

b. Location and zone.

c. Traverse air temperature in deg F.

d. Duct static pressure in inches wg.

e. Duct size in inches.

f. Duct area (sq. ft).

g. Design airflow rate in cfm.

h. Design velocity in fpm.

i. Actual airflow rate in cfm.

j. Actual average velocity in fpm.

k. Barometric pressure in psig.

K. Condenser Reports: For refrigerant side of unitary systems or air-cooledcondensing units, include the following:


a. Unit identification.

b. Location.

c. Unit make and model number.

d. Refrigerant weight in pounds.

e. Low ambient temperature cutoff in deg F.

2. Test Data: Include design and actual values for the following asapplicable to the equipment installed:

a. Entering-air, dry-bulb temperature in deg F.



b. Leaving-air, dry-bulb temperature in deg F.

c. Control settings.

d. Unloader set points.

e. Low-pressure-cutout set point in psig.

f. High-pressure-cutout set point in psig.

g. Suction pressure in psig.

h. Suction temperature in deg F.

i. Condenser refrigerant pressure in psig.

j. Condenser refrigerant temperature in deg F.

k. Voltage at each connection.

l. Amperage for each phase.

m. The kW input.

n. Crankcase heater kW.

o. Number of fans.

p. Condenser fan motor make, frame size, rpm, and horsepower.

q. Condenser fan motor voltage at each connection.

r. Condenser fan motor amperage for each phase.

L. Instrument Calibration Reports: For instrument calibration, include the following:

1. Report Data: Include the following:

a. Instrument type and make.

b. Serial number.

c. Application.



d. Dates of use.

e. Dates of calibration.

3 .012 ADDITIONAL TESTS:

A. Within 90 days of completing testing, adjusting, and balancing, performadditional testing and balancing to verify that balanced conditions are beingmaintained throughout and to correct unusual conditions.

B. Seasonal Periods: If initial testing, adjusting, and balancing procedures werenot performed during near-peak summer and winter conditions, performadditional inspections, testing, and adjusting during near-peak summer andwinter conditions.

END OF SECTION 15993



THIS PAGE LEFT BLANK
