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REGISTERS AND DIFFUSERS CLEANING AIR SYSTEM INSTALLATION OF PACKAGED ROOFTOP UNITS DAMPERS FLEXIBLE CONNECTIONS AIR FLOW BALANCE AND TESTS INSULATION
A. Registers and diffusers shall be Titus, or equal by Barbara-Colman or Tuttle and Bailey, equal to those specified in the following paragraphs. Volume dampers shall be allen key operated. Wall mounted registers shall have sponge rubber gasket at perimeter of frame. All registers to be aluminum painted to a white smooth finish
B. Return and Exhaust Register (CRR/CER) - Titus Model 30RL/AG15 steel deflected blade register, off white finish.
C. Return Registers (TRR) to be Titus Model 355R.
D Slot Diffuser (SD) – to be Titus Model ML-38, ¾” slot, 48” long with frame and border type 3, concealed mounting for exposed duct installation.
E. Equivalent products Price, Anemostat, or equivalent will be approved.
PART 3 - INSTALLATION
3.01 CLEANING AIR SYSTEM
A. No air handling units shall be run for temporary heating, ventilating, testing, or otherwise without filters in place.
B. Upon completion of construction and before testing, the interior of all air handling units and plenums shall be vacuum cleaned to remove all construction dirt, dust, etc. before the units are turned on, and clean filters shall be installed.
3.02 CUTTING, PATCHING AND DRILLING
A. Drilling of all holes 2" diameter and smaller required for the installation of heating and ventilating piping and equipment shall be performed by the Contractor. Cutting and patching shall be performed by the General Contractor in accordance with the General Conditions. All work and materials shall be installed in such a manner and at such time to keep cutting and patching to a minimum. Location for chases, openings, etc. shall be checked by the Contractor, and error due to failure to co-ordinate work with other Divisions shall be the responsibility of the Contractor, who shall make the corrections as his own expense.
B. Work shall include furnishing and locating inserts required before the floors and walls are built, or be responsible for the cost of cutting and patching required for pipes where sleeves and inserts were not installed, or where incorrectly located. The Contractor shall do all drilling required for the installation of hangers. Patching of all holes, after installation of piping or equipment shall be performed by this General Contractor.
C. As the work nears completion, all pipe cutting and threading, etc. shall be done in a location approved by the Architect.
D. No pipe cutting or threading shall be done in areas where completed concrete floor slab is to remain as finished or be painted later. Should use of such an area be necessary, the Contractor shall cover the working area with canvas tarpaulins in an approved manner.
3.03 INSTALLATION OF PACKAGED ROOFTOP UNITS
A. General: Rooftop units as indicated, and in accordance with manufacturer's installation instructions. Make all modifications required to mount new units; including supports, ductwork, piping, etc.
3.04 DAMPERS
A. Install automatic dampers and manual dampers (2) each for each boiler where shown on Office Layout Diagram for combustion/ventilation and air flow. Equip all dampers with accessories as specified herein.
3.05 FLEXIBLE CONNECTIONS
A. Install flexible materials as specified on the inlet and outlet sheet metal connections to air moving apparatus, and where indicated on the plans. Clip ends with galvanized iron collars. When molded, the complete flexible connection shall have a minimum width of 5" including 1" slack.
3.06 HANGERS AND SUPPORTS
A. Duct Support: Galvanized steel angles securely fastened to duct and suspended from building structural framing.
B. Equipment Supports: All equipment shall be firmly supported on, or suspended from, the building structure. Steel angles, fasteners, rods, and vibration eliminator units required to support the equipment without undue transmission of vibration through the building shall be furnished and installed by this Contractor.
3.07 AIR FLOW BALANCE AND TESTS
A. After completion of the installation of the heating, ventilating, and exhaust systems, and prior to acceptance by the Owner, all systems and appurtenances applicable to the above systems shall be adjusted and balanced to deliver the air quantities as specified and/or indicated on the Office Layout Diagram, or as directed.
B. Total air quantities both supply and exhaust/return, shall be obtained by adjustment of fan speeds and outdoor air/return air dampers, including building static pressure. Branch duct air quantities shall be adjusted by volume or splitter dampers. Dampers shall be permanently marked after air balance is complete so that they can be restored to their correct position if disturbed at any time.
C. Volume adjusters may be used to balance air quantities at outlets and inlets providing final adjustments do not produce objectionable sound levels or objectionable drafts.
D. The Contractor shall record and submit to the Owner for evaluation and approval six (6) copies of the complete air balance report. Replacement of adjustable pulleys, addition of balancing dampers or pressure taps required to effect proper air balance shall be furnished and installed by the Contractor at no additional cost to the Owner.
3.08 INSULATION
A. All duct insulation shall be installed by an independent insulation contractor regularly engaged in that business.
B. Insulation shall not be omitted on ducts in walls nor on branches running through walls.
3.09 EQUIPMENT INSTALLATION
A. All equipment furnished under this Section shall be installed in accordance with its manufacturer's printed installation instructions and all labor and materials required to accomplish this shall be furnished by the Contractor and be included in his bid.
3.10 SYSTEM TESTS AND CLEAN-UP
A. The entire Heating and Ventilating system shall be tested at completion of the systems and it shall be established that all controls are calibrated accurately and performing satisfactorily and that all units are heating and ventilating satisfactorily. The systems shall be checked for vibration and excessive noise and all such conditions corrected.
B. At the completion of all work, all equipment on the project shall be checked and thoroughly cleaned including coils, plenums, under equipment and any and all other areas around or in equipment provided under this Section. Any filters used during construction shall be replaced with new filters during final clean-up.
C. At the completion of all work, all equipment on the project shall be checked for painting damage, and any factory finished paint that has been damaged shall be repaired to match the adjacent areas.
D. Any metal or especially covered areas that have been deformed shall be replaced with new material and repainted to match the adjacent areas.
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