Section 23 01 00 - General Provisions of HVAC Systems.doc

SECTION 23 0100 - GENERAL PROVISIONS OF HVAC SYSTEMS

PART 1 - GENERAL

1.1 WORK INCLUDED

A. Provide all labor, materials, tools, and services for a complete installation of equipment and systems contained in contract documents.

B. Principal features of work included are:

1. Heating, ventilating, and air-conditioning system.

2. Control system including line and low voltage control wiring and conduit.

3. Demolition of existing equipment and piping.

1.2 RELATED WORK

A. Electrical power and interlock and control wiring and conduit.

B. Field painting of equipment and piping.

1.3 GENERAL

A. The contract documents form a guide for a complete system. Provide all items necessary to provide a complete system but not specifically mentioned, such as hangers, transitions, offsets, and drains.

B. Layouts indicated on drawings are diagrammatical only. Coordinate exact location of equipment, ductwork, and piping to eliminate conflict with other divisions. VA COR reserves right to make reasonable changes in location of equipment, ductwork, and piping prior to construction.

C. Should Contractor find during progress of work that in his judgment existing conditions make desirable a modification, report such item promptly to VA COR for instructions. Do not make deviations from contract documents without review of VA COR and CO.

D. Supervise all work with a competent mechanic specifically qualified in mechanical discipline.

1.4 PERMITS

A. Secure and pay for permits, licenses, and inspections for work under this division.

1.5 CODES

A. Comply with all pertinent local, state, and national codes. Refer to Division 01.

1.6 STANDARDS

A. Comply with all pertinent standards. This list is provided as a convenience to Contractor and is not to be considered all inclusive.

1. Sheet Metal and Air-Conditioning Contractors National Association (SMACNA).

2. Air Moving and Conditioning Association (AMCA).

3. Air-Conditioning, Heating and Refrigeration Institute (AHRI).

4. American Society of Mechanical Engineers (ASME).

1.7 SUBMITTALS

A. Submit for review complete brochures and shop drawings for materials and equipment proposed in accordance with Division 01.

1. Brochures: Submit complete descriptions, illustrations and specification data for materials and equipment proposed. Clearly indicate proposed items when other items are shown on same sheet. Submit samples on request and/or set up for inspection. Samples will be returned to Contractor.

2. Submittals shall be submitted in line by line format. Each submittal shall be provided with a cover letter and supporting documentation indicating how the submittal meets each line of the referenced specification section. All discrepancies between the construction documents and the submitted product shall be clearly identified for engineer evaluation.

3. If a product other than the basis of design is rejected by the engineer for any reason, the Contractor shall provide the basis of design product at no additional cost to the Owner.

4. Shop Drawings:

a. Control systems.

b. Complete equipment and piping systems in equipment rooms.

1.8 PROJECT MAINTENANCE MANUALS

A. Prior to final acceptance of project, provide Owner with bound maintenance manuals in accordance with Division 01.

1.9 PROJECT TECHNICAL INSTRUCTION

A. Prior to final inspection of project, provide technical instruction to Owner as follows:

1. Field Instruction: Provide explanation of how systems and equipment are to operate during each season and during emergencies.

2. Field Demonstration: Demonstrate operation and routine maintenance for systems and equipment.

1.10 PROTECTION

A. Protect all materials and equipment in accordance with Division 01.

B. The contractor must take appropriate precautions, during construction, to prevent unnecessary dust and debris from getting into air and water handling systems by covering equipment, controls and open-ended ducts and pipes as the installation progresses.

1.11 CONSTRUCTION RECORD DOCUMENT

A. Provide construction record documents in accordance with Division 01. Keep at the project one set of drawings and daily record changes at the time they are made. Give drawings to Owner at project completion.

1.12 EXISTING SERVICES

A. Maintain existing services in operation during construction. Coordinate and schedule all service interruptions with Owner.

1.13 OWNER NOTIFICATION

A. Notify Owner two weeks prior to activation of central chilled water service to project.

PART 2 - PRODUCTS

2.1 MATERIALS AND EQUIPMENT

A. Provide materials and equipment of domestic manufacturer bearing the U.L. label when such label is available.

PART 3 - EXECUTION

3.1 COORDINATION

A. Coordinate work in accordance with Division 01. Coordinate locations of equipment, ductwork, and piping to eliminate conflict with other divisions.

B. Carefully examine contract documents to be thoroughly familiar with items which require plumbing or mechanical connections and coordination.

C. Provide proper chases and openings. Place sleeves and supports prior to pouring concrete or installation of masonry.

3.2 CUTTING AND PATCHING

A. Repair or replace routine damage caused by cutting in performance of contract.

B. Correct unnecessary damage caused due to installation of mechanical work.

C. Perform repairs with materials that match existing in accordance with the appropriate section of these specifications.

3.3 FLASHING, COUNTERFLASHING, AND SEALING

A. Flash, counterflash, and seal piping at penetrations of roofs and outside walls. To provide a waterproof installation.

3.4 FOUNDATIONS AND PADS

A. Provide foundations, pads, and bases required for equipment. Concrete to be in accordance with concrete division of specifications.

B. Coordinate proper sizes and locations of foundations, pads, bases, anchors, supports, and other items to be built into structure.

3.5 IDENTIFICATION

A. Identify exposed or accessible piping with stenciling contents indicating pipe contents and direction of flow on piping not more than 20 feet apart, at valves, at access panels, and at least once above each space.

B. Contractors option to identify exposed or accessible piping with snap-on or strap-on type markers. Color code markers in accordance with ANSI. Indicate pipe contents and direction of flow on marker. Install markers on piping not more than 20 feet apart, at valves, at access panels, and at least once above each space.

C. Identify all mechanical equipment with engraved brass, aluminum, or stainless steel nameplates or tags. Use equipment names and numbers appearing in schedules on drawings. Fasten nameplates to equipment using screws. Glue or adhesive is not acceptable. Fasten tags to equipment using brass, aluminum or stainless steel chains.

D. Frame and mount control diagrams and sequences in each equipment room. Use non-fading black and white prints encased in aluminum frame with plexiglass cover.

3.6 CLEANING

A. Thoroughly clean the construction area to include, work area, ductwork and equipment casings before fans and filters are operated.

B. Repair damaged factory finishes covering all bare places and scratches.

C. Cleaning HVAC Systems Water Piping:

1. Clean all equipment and piping of iron cuttings and other foreign matter as they are installed.

2. [Thoroughly flush HVAC water systems with precleaning chemicals designed to remove depositions such as pipe dope, oils, rust, mill scale, and other extraneous materials. Provide dosages of precleaner chemicals recommended by water treatment supplier and add and circulate throughout the water systems. Drain, refill, and flush water systems thoroughly until no foreign matter is observed and total alkalinity of the drain water is equal to that of the make-up water.]

3.7 TESTING

A. Test all installed equipment and systems and demonstrate proper operation. Correct and retest work found defective when tested.

B. Thoroughly check piping system for leaks. Do not add any leak-stop compounds to the system. Make repairs to piping system with new materials. Peening, doping, or caulking of joints or holes is not acceptable.

C. Conduct air or smoke test if in opinion of VA COR reasonable cause exists to suspect leakage or low quality workmanship.

D. Test HVAC systems water piping at a water pressure of 125 psig for two hours without leaks.

E. Vibration Tests:

1. Test vibration isolation system in accordance with methods and procedures described in the Testing, Adjusting, and Balancing Chapter in the latest edition of ASHRAE Applications Handbook.

2. Verify all vibration isolation systems are free floating and not short circuited by any connection between equipment and building structure.

3. Operate mechanical systems and verify visually and audibly that there is no excessive vibration or noise generated by the system.

3.8 SYSTEM TESTING, ADJUSTING, AND BALANCING (TAB)

A. Procure services of an independent testing, adjusting, and balancing agency to test, adjust, and balance mechanical systems. Submit TAB agency for review. Provide references of at least five completed projects of similar size and scope. TAB agency to be certified member of Associated Air Balance Council (AABC) or National Environmental Balancing Bureau (NEBB).

B. Begin TAB after system has been completed and is in full working order. Place mechanical systems into operation and continue operation during each working day of TAB. Work performed by TAB agency to be under direct supervision of qualified TAB technician. Accurately calibrate and maintain in good working order instruments used in performance of TAB.

C. Water System Testing, Adjusting, and Balancing:

1. Examine water system and determine if system has been treated and cleaned as previously specified.

2. Check and set operating temperatures of chiller to design requirements.

3. Adjust each chiller to within 10 percent of design gpm.

4. Record design, initial, and final readings for each chiller.

D. Perform work, record data, and submit complete TAB report to Designer and VA COR for review/approval upon completion.

E. VA COR may request a recheck or resetting of any item listed in report. Provide tests VA COR may request.

F. VA COR will accept job on basis of tests and inspections. A representative of TAB agency and control system manufacturer is to be in attendance to assist final inspection. Furnish necessary mechanics to operate system, make any necessary adjustments, and assist with final inspection. In addition to requirements of Division 01, complete the following before requesting a final inspection.

1. Work required under this division of specifications.

2. System testing, adjusting, and balancing.

3. Control system commissioning.

4. Furnish required project maintenance manuals and control diagrams and sequences.

END OF SECTION 23 0100

23 0100 - 6