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   PART 1 - GENERAL

    01 WORK INCLUDED

    A. Contractor shall furnish all labor, materials, tools, and services required to test and balance mechanical systems.

    B. Contractor shall retain the services of a qualified, independent testing and balancing agency for purposes of balancing mechanical systems.

    C. Test and Balance Contractor shall be a completely independent entity and a member of Associated Air Balance Council (AABC). Test and balance shall be performed by procedures outlined by AABC.

    02 SUBMITTALS

    A. Provide certification of membership of contractor in required balance council/bureau.

    B. Perform review of contract documentation within 30 days of contract award for conditions which would hinder balancing and notify the Architect in writing of these conditions.

    C. Submit copies of the Test and Balance Report to Architect in accordance with Section 15010.

    03 RELATED WORK

    A. Cleaning and Start-Up

    B. Piping - Pressure testing of piping

    04 OPPOSED SEASON TESTING

    A. The initial test and balance shall be performed under either heating or cooling season. The test and balance procedure shall be repeated for the opposing season.

   PART 2 - PRODUCTS

   Not Used

   PART 3 - EXECUTION

    05 TESTING AND BALANCING GENERAL REQUIREMENTS

    A. AHU Control System Testing:

    1. Check temperature controls for proper calibration and setpoint.

    2. Check static pressure control, under maximum and minimum conditions, for proper operation.

    B. Thermostats and Controller Testing:

    1. Check for proper control of valves, terminal units, exhaust fans, etc.

    2. Set at design setpoint.

    C. Thermostat Calibration:

    1. Measure and record dry and wet bulb temperatures at each thermostat.

    2. Note any thermostat which is not controlling within plus/minus 1.5 degree F.

    D. Control Temperature Readouts:

    1. Test actual temperature next to sensing bulb (if possible) and compare to read-out gage.

    2. Report any gage out of calibration.

    06 TESTING AND BALANCING AIR SYSTEMS

    A. Medium and high pressure duct systems as defined in Section 15890 shall be pressure tested in accordance with SMACNA Guidelines. Seal all joints and seams, repair or replace duct sections to eliminate audible duct leakage with the duct system pressurized to 150% of design duct static pressure. In no case shall total leakage exceed (1) one percent of design airflow. Testing shall be completed and certification of testing submitted to and approved by Architect before insulation or concealment is started.

    B. Outside Air:

    1. With supply system in the maximum mode, adjust minimum outside air damper to design.

    2. After completion, take total unit static profile and record all final statics, amperages, rpm, cfm, etc.

    3. Repeat procedure for outside air damper set for maximum design flow.

    B. Ventilation and Pressurization Verifications:

    1. Balance each supply, return and exhaust air outlet within 10% of design.

    2. Check and/or adjust pressure relationships so that each positive pressure and each negative pressure area is at least 10% positive or negative as appropriate, unless shown otherwise on the drawings.

    3.02 TESTING AND BALANCING WATER SYSTEMS

    A. Hot Water:

    1. Check system for cleanliness.

    2. With all hot water coils calling for full heat, set and record pump head.

    3. If main flow measuring device is available, record total flow.

    4. Measure and set distribution flow stations, record final settings.

    5. Test and record pressure drops through heat exchangers.

    6. Test and set pressure drops to submittal specifications on all air handling units and preheat coils. If flow measuring stations are installed, the measuring station shall take precedence over the pressure drops for flow determination. Record all results.

    7. Verify that piping risers and coils are properly vented.

    8. Verify removal of pump start up strainer and replacement with operating strainer or existence of suction diffuser.

    B. Heating and Heat Recovery Coils (Air Handling Unit):

    1. Measure entering and leaving dry bulb temperature with glass stem, mercury thermometers accurate to 1/2 degree F.

    2. Measure entering and leaving water temperature with glass stem mercury thermometers accurate to 1 degree F, if thermometer wells are provided. If P.T. plugs are installed, use a bi-metal thermometer accurate to 2 degrees F.

    3. Compute BTUH and GPM from heat transfer test.

    4. Readjust flow through coil until heat transfer test indicates proper GPM. (Heat transfer test takes precedence over coil pressure drop.)

    5. Record final temperatures, BTUH and GPM.

    6. Convert actual test conditions to design entering temperatures to insure design coil capacities at design temperatures. (Summer temperatures may have entering temperatures too extreme to accurately convert to winter loads.)

    C. Boilers:

    1. Test and record maximum rated boiler capacity.

    2. Record feedwater flow in GPM.

    3. Record feedwater supply temperature in degree F.

    4. Record boiler fuel consumption in gallons/HR or CFH as appropriate.

    5. Record boiler exhaust gas stack temperature in degree F.

    6. Record boiler stack draft static pressure in inches of water.

    7. Perform log-test for a minimum of one hour taking readings at least every ten minutes. Average all readings and computer actual capacity in BTUH.

    3.03 TESTING AND BALANCING REPORT

    A. The Contractor shall submit to the Architect six (6) copies of a typed, written report to include the following:

    1. A statement that all systems have been tested, checked out, balanced and are operating properly.

    2. A statement that all filters and strainers have been replaced.

    3. Air-side temperature and other readings for each ventilating unit, including:

    a) Outside Air Temp (DB/WB)

    b) Supply Air Temp (DB/WB)

    c) Fan RPM

    d) Total Static Pressure

    e) Pressure Drop Across Components

    f) Motor Voltage and Amps

    g) CFM at each Supply, Return and Exhaust outlet

    4. Entering and leaving pressures, measured with the same calibrated gauge on the following equipment:

    a) Hot water and heat recovery coils in ventilating units.

    b) Boilers

    c) Pumps

    5. Entering and leaving temperatures, measured with the same calibrated thermometer, on the following equipment:

    a) Hot water and heat recovery coils in ventilating units.

    6. GPM for equipment listed in item 3.

    7. Actual volts and amps, nameplate volts and amps on motors.

    8. Flow rates as recorded on permanent main system flow meters, if any.

    All reports by the Contractor shall include both the date of the test and the names of all persons performing and witnessing the tests.

   END OF SECTION