230593 - testing adjusting and balancing.doc
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- Construct Addition/Fire Suppression B104
- Solicitation number
- FA6656-09-R-0005
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Specification Section 23 05 93 Testing Adjusting and Balancing
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SECTION 23 05 93
TESTING, ADJUSTING, AND BALANCING
PART 1 - GENERAL
1.01 Related Documents:
A.
Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
1.02
SECTION INCLUDES:
A.
Testing, adjustment, and balancing of air systems.
B.
Measurement of final operating condition of HVAC systems.
1.03
RELATED SECTIONS:
A.
Section 23 01 00 - General HVAC Requirements
B.
Section 23 81 20 - Packaged Roof Top Air Conditioning Units
C.
Section 23 73 13 - Air Handling Units
D.
Section 23 34 23 - Power Ventilators
E.
Section 23 31 13 - Ductwork and Accessories
F.
Section 23 37 00 - Air Distribution Devices
1.04
SUBMITTALS:
A.
Submit name of Testing and Balancing Agency for approval within 30 days after award of Contract.
B.
Submit test reports in accordance with Section 230100.
C.
Submit draft copies of report for review prior to final acceptance of project. Provide final copies for Architect/Engineer and for inclusion in Maintenance Manuals.
D.
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.
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 b.
Company address c.
Company telephone number d.
Project name e.
Project location f.
Project Architect/Engineer g.
Project Contractor
2.
Instrument List:
Instrument
Manufacturer
Model
Serial number
Range
Calibration date
3.
Air Handling Unit Data:
Location
Company address
Air flow, specified and actual
Return air flow, specified and actual
Outside air flow, specified and actual h.
Total static pressure (total external), specified and actual
4.
Exhaust Fan Data:
Location
Air flow, specified and actual
Total static pressure (total external), specified and actual
Inlet pressure
Discharge pressure
Fan RPM
5.
Duct Traverse:
System zone/branch
Duct size
Area
Design velocity
Design air flow
Test velocity
Test air flow
Duct static pressure i.
Air temperature
6.
Air Distribution Test Sheet:
Air terminal number
Room number/location
Terminal type
Terminal size
Area factor
Design velocity
Design air flow
Test (final) velocity i.
Test (final) air flow j.
Percent of design air flow
1.06
QUALITY ASSURANCE:
A.
Agency shall be company specializing in the adjusting and balancing of systems specified in this Section with minimum of five (5) years documented experience. Perform Work under supervision of AABC Certified Test and Balance Engineer or NEBB Certified Testing, Balancing and Adjusting Supervisor.
B.
Total system balance shall be performed in accordance with AAAB national Standards for Field Measurements and Instrumentation, Total System Balance or NEBB Procedural Standards for Testing, Balancing and Adjusting of Environmental Systems.
1.07
SEQUENCING AND SCHEDULING:
A.
Sequence work to commence after completion of systems and schedule completion of work before Substantial Completion of Project.
PART 2 - PRODUCTS
2.01
AGENCY:
A.
Agency shall be a member of AABC or NEBB.
PART 3 - EXECUTION
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 filter.
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.
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:
A.
Provide all instruments required for testing, adjusting, and balancing operations.
B.
Coordinate balancing work with Temperature Control Contractor as required regarding auto dampers, valves, etc.
3.03
INSTALLATION TOLERANCES:
A.
Adjust air handling systems to plus or minus 5% for supply systems and plus or minus 10% for return and exhaust systems from figures 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 system in proper working order, replacing belt guards, closing access doors, closing doors to electrical switch boxes, and restoring thermostats to specified settings.
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 all air distribution devices.
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.
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.
H.
Adjust outside air automatic dampers, outside air, return air, and exhaust dampers for design conditions.
I.
Measure temperature conditions across outside air, return air, and exhaust dampers to check leakage.
J.
Where modulating dampers are provided, take measurements and balance at extreme conditions.
END OF SECTION 23 05 93
23 05 93-6
TESTING, ADJUSTING, AND BALANCING
12910-330
Revised 3/2/09
12910-330
TESTING, ADJUSTING, AND BALANCING
23 05 93-5
Revised 3/2/09
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