Section 23 05 11 - Common Work Results for HVAC.docx

02-01-20

SECTION 23 05 11

COMMON WORK RESULTS FOR HVAC

SPEC WRITER NOTES:

3. See Paragraph 1.3.J for the Physical Security.

4. Provide the year of latest edition to each publication listed in Article 1.3 APPLICABLE PUBLICATIONS.

GENERAL

DESCRIPTION

The requirements of this Section apply to all sections of Division 23.

Definitions:

Exposed: Piping, ductwork, and equipment exposed to view in finished rooms.

Exterior: Piping, ductwork, and equipment exposed to weather be it temperature, humidity, precipitation, wind, or solar radiation.

Abbreviations/Acronyms:

ac: Alternating Current AC: Air Conditioning ACU: Air Conditioning Unit ACR: Air Conditioning and Refrigeration AI: Analog Input AISI: American Iron and Steel Institute AO: Analog Output ASJ: All Service Jacket AWG: American Wire Gauge BACnet: Building Automation and Control Networking Protocol BAg: Silver-Copper-Zinc Brazing Alloy BAS: Building Automation System BCuP: Silver-Copper-Phosphorus Brazing Alloy bhp: Brake Horsepower Btu: British Thermal Unit Btu/h: British Thermal Unit Per Hour CDA: Copper Development Association C: Celsius CD: Compact Disk CFM: Cubic Foot Per Minute CH: Chilled Water Supply CHR: Chilled Water Return CLR: Color CO: Carbon Monoxide COR: Contracting Officer’s Representative CPD: Condensate Pump Discharge CPM: Cycles Per Minute CPVC: Chlorinated Polyvinyl Chloride CRS: Corrosion Resistant Steel CTPD: Condensate Transfer Pump Discharge CTPS: Condensate Transfer Pump Suction CW: Cold Water CWP: Cold Working Pressure CxA: Commissioning Agent dB: Decibels dB(A): Decibels (A weighted) DDC: Direct Digital Control DI: Digital Input DO: Digital Output DVD: Digital Video Disc DN: Diameter Nominal DWV: Drainage, Waste and Vent EPDM: Ethylene Propylene Diene Monomer EPT: Ethylene Propylene Terpolymer ETO: Ethylene Oxide F: Fahrenheit FAR: Federal Acquisition Regulations FD: Floor Drain FED: Federal FG: Fiberglass FGR: Flue Gas Recirculation FOS: Fuel Oil Supply FOR: Fuel Oil Return FSK: Foil-Scrim-Kraft facing FWPD: Feedwater Pump Discharge FWPS: Feedwater Pump Suction GC: Chilled Glycol Water Supply GCR: Chilled Glycol Water Return GH: Hot Glycol Water Heating Supply GHR: Hot Glycol Water Heating Return gpm: Gallons Per Minute HDPE: High Density Polyethylene Hg: Mercury HOA: Hands-Off-Automatic hp: Horsepower HPS: High Pressure Steam (414 kPa (60 psig) and above) HPR: High Pressure Steam Condensate Return HW: Hot Water HWH: Hot Water Heating Supply HWHR: Hot Water Heating Return Hz: Hertz ID: Inside Diameter IPS: Iron Pipe Size kg: Kilogram klb: 1000 lb kPa: Kilopascal lb: Pound lb/hr: Pounds Per Hour L/s: Liters Per Second L/min: Liters Per Minute LPS: Low Pressure Steam (103 kPa (15 psig) and below) LPR: Low Pressure Steam Condensate Gravity Return MAWP: Maximum Allowable Working Pressure MAX: Maximum MBtu/h: 1000 Btu/h MBtu: 1000 Btu MED: Medical m: Meter MFG: Manufacturer mg: Milligram mg/L: Milligrams Per Liter MIN: Minimum MJ: Megajoules ml: Milliliter mm: Millimeter MPS: Medium Pressure Steam (110 kPa (16 psig) through 414 kPa (60 psig)) MPR: Medium Pressure Steam Condensate Return MW: Megawatt NC: Normally Closed NF: Oil Free Dry (Nitrogen) Nm: Newton Meter NO: Normally Open NOx: Nitrous Oxide NPT: National Pipe Thread NPS: Nominal Pipe Size OD: Outside Diameter OSD: Open Sight Drain OS&Y: Outside Stem and Yoke PC: Pumped Condensate PID: Proportional-Integral-Differential PLC: Programmable Logic Controllers PP: Polypropylene PPE: Personal Protection Equipment ppb: Parts Per Billion ppm: Parts Per Million PRV: Pressure Reducing Valve \ PSIA: Pounds Per Square Inch Absolute psig: Pounds Per Square Inch Gauge PTFE: Polytetrafluoroethylene PVC: Polyvinyl Chloride PVDC: Polyvinylidene Chloride Vapor Retarder Jacketing, White PVDF: Polyvinylidene Fluoride rad: Radians RH: Relative Humidity RO: Reverse Osmosis rms: Root Mean Square RPM: Revolutions Per Minute RS: Refrigerant Suction RTD: Resistance Temperature Detectors RTRF: Reinforced Thermosetting Resin Fittings RTRP: Reinforced Thermosetting Resin Pipe SCFM: Standard Cubic Feet Per Minute SPEC: Specification SPS: Sterile Processing Services STD: Standard SDR: Standard Dimension Ratio SUS: Saybolt Universal Second SW: Soft water SWP: Steam Working Pressure TAB: Testing, Adjusting, and Balancing TDH: Total Dynamic Head TEFC: Totally Enclosed Fan-Cooled TFE: Tetrafluoroethylene THERM: 100,000 Btu THHN: Thermoplastic High-Heat Resistant Nylon Coated Wire THWN: Thermoplastic Heat & Water-Resistant Nylon Coated Wire T/P: Temperature and Pressure USDA: U.S. Department of Agriculture V: Volt VAC: Vacuum VA: Veterans Administration VAC: Voltage in Alternating Current VA CFM: VA Construction & Facilities Management VA CFM CSS: VA Construction & Facilities Management, Consulting Support Service VAMC: Veterans Administration Medical Center VHA OCAMES: Veterans Health Administration – Office of Capital Asset Management Engineering and Support VR: Vacuum condensate return WCB: Wrought Carbon Steel, Grade B WG: Water Gauge or Water Column WOG: Water, Oil, Gas

RELATED WORK

Section 01 00 00, GENERAL REQUIREMENTS.

Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Section 01 74 19, CONSTRUCTION WASTE MANAGEMENT.

//Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS.// //Section 01 91 00, GENERAL COMMISSIONING REQUIREMENTS.// //Section 02 82 11, TRADITIONAL ASBESTOS ABATEMENT.// //Section 03 30 00, CAST-IN-PLACE CONCRETE.// //Section 05 31 00, STEEL DECKING.// //Section 05 36 00, COMPOSITE METAL DECKING.// Section 05 50 00, METAL FABRICATIONS.

Section 07 84 00, FIRESTOPPING.

Section 07 92 00, JOINT SEALANTS.

Section 09 91 00, PAINTING.

//Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS.// Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM GENERATION.

Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING and EQUIPMENT.

Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC.

Section 23 07 11, HVAC AND BOILER PLANT INSULATION.

//Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.// //Section 23 09 11, DEMONSTRATIONS AND TESTS FOR BOILER PLANT // Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

Section 23 36 00, AIR TERMINAL UNITS.

Section 23 82 00, CONVECTION HEATING AND COOLING UNITS.

Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS.

Section 26 05 19, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES.

Section 26 29 11, MOTOR CONTROLLERS.

APPLICABLE PUBLICATIONS

SPEC WRITER NOTE:

1. Make material requirements agree with requirements specified in the referenced Applicable Publications. Verify and update the publication list to that which applies to the project, unless the reference applies to all mechanical systems. Publications that apply to all mechanical systems may not be specifically referenced in the body of the specification, but, shall form a part of this specification.

2. Insert the year of approved latest edition of the publications between the brackets and delete the brackets // // if applicable to this project.

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standard will govern.

Air Movement and Control Association (AMCA):

410-//1996// Recommended Safety Practices for Users and Installers of Industrial and Commercial Fans American Society of Mechanical Engineers (ASME):

ASME Boiler and Pressure Vessel Code:

BPVC Section IX-//2019// Welding, Brazing, and Fusing Qualifications American Society for Testing and Materials (ASTM):

Association for Rubber Products Manufacturers (ARPM):

Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry, Inc.:

A. Military Specifications (MIL):

MIL-P-21035B-//2013// Paint High Zinc Dust Content, Galvanizing Repair (Metric) National Fire Protection Association (NFPA):

B. Department of Veterans Affairs (VA):

PG-18-10-//2016// Physical Security and Resiliency Design Manual

SUBMITTALS

Submittals, including number of required copies, shall be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Information and material submitted under this section shall be marked “SUBMITTED UNDER SECTION 23 05 11, COMMON WORK RESULTS FOR HVAC”, with applicable paragraph identification.

//If the project is phased submit complete phasing plan/schedule with manpower levels prior to commencing work. The phasing plan shall be detailed enough to provide milestones in the process that can be verified.// Contractor shall make all necessary field measurements and investigations to assure that the equipment and assemblies will meet contract requirements, and all equipment that requires regular maintenance, calibration, etc are accessable from the floor or permanent work platform. It is the Contractor’s responsibility to ensure all submittals meet the VA specifications and requirements and it is assumed by the VA that all submittals do meet the VA specifications unless the Contractor has requested a variance in writing and approved by COR prior to the submittal. If at any time during the project it is found that any item does not meet the VA specifications and there was no variance approval the Contractor shall correct at no additional cost or time to the Government even if a submittal was approved.

If equipment is submitted which differs in arrangement from that shown, provide documentation proving equivalent performance, design standards and drawings that show the rearrangement of all associated systems. Additionally, any impacts on ancillary equipment or services such as foundations, piping, and electrical shall be the Contractor’s responsibility to design, supply, and install at no additional cost or time to the Government. VA approval will be given only if all features of the equipment and associated systems, including accessibility, are equivalent to that required by the contract.

Prior to submitting shop drawings for approval, Contractor shall certify in writing that manufacturers of all major items of equipment have each reviewed contract documents, and have jointly coordinated and properly integrated their equipment and controls to provide a complete and efficient installation.

Submittals and shop drawings for interdependent items, containing applicable descriptive information, shall be furnished together. Coordinate and properly integrate materials and equipment to provide a completely compatible and efficient installation.

SPEC WRITER NOTE: Include the paragraph below if samples are required for any specified items.

//Samples: Samples will not be required, except for insulation or where materials offered differ from specification requirements. Samples shall be accompanied by full description of characteristics different from specification. The Government, at the Government’s expense, will perform evaluation and testing if necessary. The Contractor may submit samples of additional material at the Contractor's option; however, if additional samples of materials are submitted later, pursuant to Government request, adjustment in contract price and time will be made.// SPEC WRITER NOTE: Include the paragraph below if mock-ups are required for any specified items. Indicate and describe required mock-ups in the submittal paragraph of the individual Division 23 sections.

//Mock-ups: Mock-ups are required for critical items and typical component installations replicated numerous times throughout the project as indicated in the individual Division 23 sections. The COR and VAMC representatives shall review and approve the mock-up prior to installation of additional applicable components.// Coordination/Shop Drawings:

Submit complete consolidated and coordinated shop drawings for all new systems, and for existing systems that are in the same areas.

The coordination/shop drawings shall include plan views, elevations and sections of all systems and shall be on a scale of not less than 1:32 (3/8-inch equal to one foot). Clearly identify and dimension the proposed locations of the principal items of equipment. The drawings shall clearly show locations and adequate clearance for all equipment, piping, valves, control panels and other items. Show the access means for all items requiring access for operations and maintenance. Provide detailed coordination/shop drawings of all piping and duct systems. The drawings should include all lockout/tagout points for all energy/hazard sources for each piece of equipment. Coordinate lockout/tagout procedures and practices with local VA requirements.

Do not install equipment foundations, equipment or piping until coordination/shop drawings have been approved.

In addition, for HVAC systems, provide details of the following:

Mechanical equipment rooms.

//Interstitial space.// Hangers, inserts, supports, and bracing.

Pipe sleeves.

Duct or equipment penetrations of floors, walls, ceilings, or roofs.

Manufacturer's Literature and Data: Include full item description and optional features and accessories. Include dimensions, weights, materials, applications, standard compliance, model numbers, size, and capacity. Submit under the pertinent section rather than under this section.

Submit belt drive with the driven equipment. Submit selection data for specific drives when requested by the COR.

Submit electric motor data and variable speed drive data with the driven equipment.

Equipment and materials identification.

Fire-stopping materials.

Hangers, inserts, supports and bracing. Provide complete stress analysis for variable spring and constant support hangers.

Wall, floor, and ceiling plates.

Rigging Plan: Provide documentation of the capacity and weight of the rigging and equipment intended to be used. The plan shall include the path of travel of the load, the staging area and intended access, and qualifications of the operator and signal person.

HVAC Maintenance Data and Operating Instructions:

Maintenance and operating manuals in accordance with Section 01 00 00, GENERAL REQUIREMENTS, Article, INSTRUCTIONS, for systems and equipment.

Complete operating and maintenance manuals including wiring diagrams, technical data sheets, information for ordering replacement parts, and troubleshooting guide:

Include complete list indicating all components of the systems.

Include complete diagrams of the internal wiring for each item of equipment.

Diagrams shall have their terminals identified to facilitate installation, operation and maintenance.

Provide a listing of recommended replacement parts for keeping in stock supply, including sources of supply, for equipment. Include in the listing belts for equipment: Belt manufacturer, model number, size and style, and distinguished whether of multiple belt sets.

Provide copies of approved HVAC equipment submittals to the TAB //and Commissioning// Subcontractor.

//Completed System Readiness Checklist provided by the Commissioning Agent and completed by the Contractor, signed by a qualified technician and dated on the date of completion, in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.// //Submit training plans and instructor qualifications in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.//

QUALITY ASSURANCE

Mechanical, electrical and associated systems shall be safe, reliable, efficient, durable, easily and safely operable and maintainable, easily and safely accessible, and in compliance with applicable codes as specified. The systems shall be comprised of high quality institutional-class and industrial-class products of manufacturers that are experienced specialists in the required product lines. All construction firms and personnel shall be experienced and qualified specialists in industrial and institutional HVAC.

Flow Rate Tolerance for HVAC Equipment: Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC.

Equipment Vibration Tolerance:

Refer to Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING and EQUIPMENT. Equipment shall be factory-balanced to this tolerance and re-balanced on site, as necessary.

After HVAC air balance work is completed and permanent drive sheaves are in place, perform field mechanical balancing and adjustments required to meet the specified vibration tolerance.

Products Criteria:

Standard Products: Material and equipment shall be the standard products of a manufacturer regularly engaged in the manufacture of the products for at least 3 years (or longer as specified elsewhere). The design, model and size of each item shall have been in satisfactory and efficient operation on at least three installations for approximately three years. However, digital electronics devices, software and systems such as controls, instruments, computer work station, shall be the current generation of technology and basic design that has a proven satisfactory service record of at least three years. See other specification sections for any exceptions and/or additional requirements.

Refer to all other sections for quality assurance requirements for systems and equipment specified therein.

All items furnished shall be free from defects that would adversely affect the performance, maintainability and appearance of individual components and overall assembly.

The products and execution of work specified in Division 33 shall conform to the referenced codes and standards as required by the specifications. Local codes and amendments shall be enforced, along with requirements of local utility companies. The most stringent requirements of these specifications, local codes, or utility company requirements shall always apply. Any conflicts shall be brought to the attention of the COR.

Multiple Units: When two or more units of materials or equipment of the same type or class are required, these units shall be of the same manufacturer and model number, or if different models are required they shall be of the same manufacturer and identical to the greatest extent possible (i.e., same model series).

Assembled Units: Performance and warranty of all components that make up an assembled unit shall be the responsibility of the manufacturer of the completed assembly.

Nameplates: Nameplate bearing manufacturer's name or identifiable trademark shall be securely affixed in a conspicuous place on equipment, or name or trademark cast integrally with equipment, stamped or otherwise permanently marked on each item of equipment.

Use of asbestos products or equipment or materials containing asbestos is prohibited.

HVAC Equipment Service Providers: Service providers shall be authorized and trained by the manufacturers of the equipment supplied. These providers shall be capable of responding onsite and provide acceptable service to restore equipment operations within //4// // // hours of receipt of notification by phone, e-mail or fax in event of an emergency, such as the shutdown of equipment; or within //24// // // hours in a non-emergency. Submit names, mail and e-mail addresses and phone numbers of service personnel and companies providing service under these conditions for (as applicable to the project): fans, air handling units, chillers, cooling towers, control systems, pumps, critical instrumentation, computer workstation and programming.

HVAC Mechanical Systems Welding: Before any welding is performed, Contractor shall submit a certificate certifying that welders comply with the following requirements:

Qualify welding processes and operators for piping according to ASME BPVC Section IX. Provide proof of current certification.

Comply with provisions of ASME B31 series "Code for Pressure Piping".

Certify that each welder and welding operator has passed American Welding Society (AWS) qualification tests for the welding processes involved, and that certification is current.

All welds shall be stamped according to the provisions of the AWS or ASME as required herein and by the associated code.

Manufacturer's Recommendations: Where installation procedures or any part thereof are required to be in accordance with the recommendations of the manufacturer of the material being installed, printed copies of these recommendations shall be furnished to the COR with submittals. Installation of the item will not be allowed to proceed until the recommendations are received. Failure to furnish these recommendations can be cause for rejection of the material and removal by the Contractor and no additional cost or time to the Government.

Execution (Installation, Construction) Quality:

Apply and install all items in accordance with manufacturer's written instructions. Refer conflicts between the manufacturer's instructions and the contract documents to the COR for resolution. Provide written hard copies and computer files on CD or DVD of manufacturer’s installation instructions to the COR with submittals prior to commencing installation of any item. Installation of the item will not be allowed to proceed until the recommendations are received and approved by the VA. Failure to furnish these recommendations is a cause for rejection of the material.

All items that require access, such as for operating, cleaning, servicing, maintenance, and calibration, shall be easily and safely accessible by persons standing at floor level, or standing on permanent platforms, without the use of portable ladders. Examples of these items include, but are not limited to, all types of valves, filters and strainers, transmitters, control devices. Prior to commencing installation work, refer conflicts between this requirement and contract documents to the COR for resolution. Failure of the Contractor to resolve, or point out any issues will result in the Contractor correcting at no additional cost or time to the Government.

Complete coordination/shop drawings shall be required in accordance with Article, SUBMITTALS. Construction work shall not start on any system until the coordination/shop drawings have been approved by VA.

Workmanship/craftsmanship will be of the highest quality and standards. The VA reserves the right to reject any work based on poor quality of workmanship this work shall be removed and done again at no additional cost or time to the Government.

Upon request by Government, provide lists of previous installations for selected items of equipment. Include contact persons who will serve as references, with current telephone numbers and e-mail addresses.

Guaranty: Warranty of Construction, FAR Clause 52.246-21.

DELIVERY, STORAGE AND HANDLING

Protection of Equipment:

Equipment and material placed on the job site shall remain in the custody of the Contractor until phased acceptance, whether or not the Government has reimbursed the Contractor for the equipment and material. The Contractor is solely responsible for the protection of such equipment and material against any damage or theft.

Large equipment such as boilers, chillers, cooling towers, fans, and air handling units if shipped on open trailer trucks shall be covered with shrink on plastics or water proof tarpaulins that provide protection from exposure to rain, road salts and other transit hazards. Protection shall be kept in place until equipment is moved into a building or installed as designed.

Repair damaged equipment in first class, new operating condition and appearance; or, replace same as determined and directed by the COR. Such repair or replacement shall be at no additional cost or time to the Government.

Protect interiors of new equipment and piping systems against entry of foreign matter. Clean both inside and outside before painting or placing equipment in operation.

Existing equipment and piping being worked on by the Contractor shall be under the custody and responsibility of the Contractor and shall be protected as required for new work.

Protect plastic piping and tanks from ultraviolet light (sunlight).

Cleanliness of Piping and Equipment Systems:

Exercise care in storage and handling of equipment and piping material to be incorporated in the work. Remove debris arising from cutting, threading and welding of piping.

Piping systems shall be flushed, blown or pigged as necessary to deliver clean systems.

Clean interior of all tanks prior to delivery for beneficial use by the Government.

Boilers shall be left clean following final internal inspection by Government insurance representative or inspector.

Contractor shall be fully responsible for all costs, damage, and delay arising from failure to provide clean systems.

AS-BUILT DOCUMENTATION

SPEC WRITER NOTE: Coordinate O&M Manual requirements with Section 01 00 00, GENERAL REQUIREMENTS. O&M manuals shall be submitted for content review as part of the close-out documents.

Submit manufacturer’s literature and data updated to include submittal review comments and any equipment substitutions.

Submit operation and maintenance data updated to include submittal review comments, VA approved substitutions and construction revisions shall be //in electronic version on CD or DVD// inserted into a three-ring binder. All aspects of system operation and maintenance procedures, including applicable piping isometrics, wiring diagrams of all circuits, a written description of system design, control logic, and sequence of operation shall be included in the operation and maintenance manual. The operations and maintenance manual shall include troubleshooting techniques and procedures for emergency situations. Notes on all special systems or devices shall be included. A List of recommended spare parts (manufacturer, model number, and quantity) shall be furnished. Information explaining any special knowledge or tools the owner will be required to employ shall be inserted into the As-Built documentation.

SPEC WRITER NOTE: Select and edit one of the bracketed options after the paragraph below to indicate the format in which the contractor must provide record drawing files. Select the hand-marked option only when the designer has been separately contracted to provide the record drawings from the contractor’s mark-ups. Select the BIM option only when a BIM model will be generated, which is typically only performed by the designer on some Design-Bid-Build projects or by the contractor on some Design-Build projects.

The installing Contractor shall maintain as-built drawings of each completed phase for verification; and, shall provide the complete set at the time of final systems certification testing. Should the installing Contractor engage the testing company to provide as-built or any portion thereof, it shall not be deemed a conflict of interest or breach of the ‘third party testing company’ requirement. Provide record drawings as follows:

//Red-lined, hand-marked drawings are to be provided, with one paper copy and a scanned PDF version of the hand-marked drawings provided on CD or DVD.// //As-built drawings are to be provided, with a copy of them on AutoCAD version // // provided on CD or DVD. The CAD drawings shall use multiple line layers with a separate individual layer for each system.// //As-built drawings are to be provided, with a copy of them in three-dimensional Building Information Modeling (BIM) software version // // provided on CD or DVD.// The as-built drawings shall indicate the location and type of all lockout/tagout points for all energy sources for all equipment and pumps to include breaker location and numbers, valve tag numbers, etc. Coordinate lockout/tagout procedures and practices with local VA requirements.

Certification documentation shall be provided to COR 21 working days prior to submitting the request for final inspection. The documentation shall include all test results, the names of individuals performing work for the testing agency on this project, detailed procedures followed for all tests, and provide documentation/certification that all results of tests were within limits specified. Test results shall contain written sequence of test procedure with written test results annotated at each step along with the expected outcome or setpoint. The results shall include all readings, including but not limited to data on device (make, model and performance characteristics_), normal pressures, switch ranges, trip points, amp readings, and calibration data to include equipment serial numbers or individual identifications, etc.

//JOB CONDITIONS – WORK IN EXISTING BUILDING

Building Operation: Government employees will be continuously operating and managing all facilities, including temporary facilities that serve the VAMC.

Maintenance of Service: Schedule all work to permit continuous service as required by the VAMC.

Steam and Condensate Service Interruptions: Limited steam and condensate service interruptions, as required for interconnections of new and existing systems, will be permitted by the COR during periods when the demands are not critical to the operation of the VAMC. These non-critical periods are limited to between 8 pm and 5 am in the appropriate off-season (if applicable). Provide at least 10 working days advance notice to the COR. The request shall include a detailed plan on the proposed shutdown and the intended work to be done along with manpower levels. All equipment and materials must be onsite and verified with plan //5// // // days prior to the shutdown or it will need to be rescheduled.

//Phasing of Work: Comply with all requirements shown on contract documents. Contractor shall submit a complete detailed phasing plan/schedule with manpower levels prior to commencing work. The phasing plan shall be detailed enough to provide milestones in the process that can be verified.// Building Working Environment: Maintain the architectural and structural integrity of the building and the working environment at all times. Maintain the interior of building at 18 degrees C (65 degrees F) minimum. Limit the opening of doors, windows or other access openings to brief periods as necessary for rigging purposes. Storm water or ground water leakage is prohibited. Provide daily clean-up of construction and demolition debris on all floor surfaces and on all equipment being operated by VA. Maintain all egress routes and safety systems/devices.

Acceptance of Work for Government Operation: As new equipment, systems and facilities are made available for operation and these items are deemed of beneficial use to the Government, inspections will be made and tests will be performed. Based on the inspections, a list of contract deficiencies will be issued to the Contractor. After correction of deficiencies as necessary for beneficial use, the Contracting Officer will process necessary acceptance and the equipment will then be under the control and operation of Government personnel.

SPEC WRITER NOTE: Delete the following paragraph if not applicable to project.

//Temporary Facilities: Refer to Article, TEMPORARY PIPING AND EQUIPMENT in this section.// //

PRODUCTS

FACTORY-ASSEMBLED PRODUCTS

Provide maximum standardization of components to reduce spare part requirements.

Performance and warranty of all components that make up an assembled unit shall be the responsibility of the manufacturer of the completed assembly.

All components of an assembled unit need not be products of same manufacturer.

Constituent parts that are alike shall be products of a single manufacturer.

Components shall be compatible with each other and with the total assembly for intended service.

Contractor shall guarantee performance of assemblies of components, and shall repair or replace elements of the assemblies as required to deliver specified performance of the complete assembly.

Equipment and components of equipment shall bear manufacturer's name and trademark, model number, serial number and performance data on a nameplate securely affixed in a conspicuous place, or cast integral with, stamped or otherwise permanently marked upon the components of the equipment.

Major items of equipment, which serve the same function, must be the same make and model. Exceptions must be approved by the VA, but may be permitted if performance requirements cannot be met.

COMPATIBILITY OF RELATED EQUIPMENT

Equipment and materials installed shall be compatible in all respects with other items being furnished and with existing items so that the result will be a complete and fully operational plant that conforms to contract requirements.

V-BELT DRIVES

Type: ARPM standard V-belts with proper motor pulley and driven sheave. Belts shall be constructed of reinforced cord and rubber.

Dimensions, rating and selection standards: ARPM IP-20 and ARPM IP-21.

Minimum Horsepower Rating: Motor horsepower plus recommended ARPM service factor (not less than 20 percent) in addition to the ARPM allowances for pitch diameter, center distance, and arc of contact.

Maximum Speed: 25 m/s (5000 feet per minute).

Adjustment Provisions: For alignment and ARPM standard allowances for installation and take-up.

Drives may utilize a single V-Belt (any cross section) when it is the manufacturer's standard.

Multiple Belts: Matched to ARPM specified limits by measurement on a belt measuring fixture. Seal matched sets together to prevent mixing or partial loss of sets. Replacement, when necessary, shall be an entire set of new matched belts.

Sheaves and Pulleys:

Material: Pressed steel, or close-grained cast iron.

Bore: Fixed or bushing type for securing to shaft with keys.

Balanced: Statically and dynamically.

Groove spacing for driving and driven pulleys shall be the same.

Drive Types, Based on ARI 435:

Provide adjustable-pitch //or fixed-pitch// drive as follows:

Fan speeds up to 1800 RPM: 7.5 kW (10 horsepower) and smaller.

Fan speeds over 1800 RPM: 2.2 kW (3 horsepower) and smaller.

Provide fixed-pitch drives for drives larger than those listed above.

The final fan speeds required to just meet the system CFM and pressure requirements, without throttling the design air flow branch, shall be determined by adjustment of a temporary adjustable-pitch motor sheave or by fan law calculation if a fixed-pitch drive is used initially.

Final Drive Set: If adjustment is required beyond the capabilities of the factory drive set, the final drive set shall be provided as part of this contract at no additional cost or time to the Government.

SYNCHRONOUS BELT DRIVES

Type: ARPM synchronous belts with proper motor pulley and driven sheave. Belts shall be constructed of reinforced cord and rubber.

Dimensions, rating and selection standards: ARPM IP-24 and ARPM IP-27.

Minimum Horsepower Rating: Motor horsepower plus recommended ARPM service factor (not less than 20 percent) in addition to the ARPM allowances for pitch diameter, center distance, and arc of contact.

Maximum Speed: 25 m/s (5000 feet per minute).

Adjustment Provisions: For alignment and ARPM standard allowances for installation and take-up.

Drives may utilize a single belt of manufacturer’s standard width for the application.

Multiple Belts: Matched to ARPM specified limits by measurement on a belt measuring fixture. Seal matched sets together to prevent mixing or partial loss of sets. Replacement, when necessary, shall be an entire set of new matched belts.

Sheaves and Pulleys:

Material: Pressed steel, or close-grained cast iron.

Bore: Fixed or bushing type for securing to shaft with keys.

Balanced: Statically and dynamically.

Final Drive Set: The final fan speeds required to just meet the system CFM and pressure requirements, without throttling the design air flow branch, shall be determined by fan law calculation. If adjustment is required beyond the capabilities of the factory drive set, the final drive set shall be provided as part of this contract at no additional cost or time to the Government.

DRIVE GUARDS

For machinery and equipment, provide guards as shown in AMCA 410 for belts, chains, couplings, pulleys, sheaves, shafts, gears and other moving parts regardless of height above the floor to prevent damage to equipment and injury to personnel. Drive guards may be excluded where motors and drives are inside factory-fabricated air handling unit casings.

Pump shafts and couplings shall be fully guarded by a sheet steel guard, covering coupling and shaft but not bearings. Material shall be minimum 16-gauge sheet steel; all edges shall be hemmed and ends shall be bent into flanges and the flanges shall be drilled and attached to pump base with minimum of four 6 mm (1/4 inch) bolts. Reinforce guard as necessary to prevent side play forcing guard onto couplings.

V-belt and sheave assemblies shall be totally enclosed, firmly mounted, non-resonant. Guard shall be an assembly of minimum 22-gauge sheet steel and expanded or perforated metal to permit observation of belts. 25 mm (1 inch) diameter hole shall be provided at each shaft centerline to permit speed measurement.

Materials: Sheet steel, expanded metal or wire mesh rigidly secured so as to be removable without disassembling pipe, duct, or electrical connections to equipment.

Access for Speed Measurement: 25 mm (1 inch) diameter hole at each shaft center.

LIFTING ATTACHMENTS

Provide equipment with suitable lifting attachments to enable equipment to be lifted in its normal position. Lifting attachments shall withstand any handling conditions that might be encountered, without bending or distortion of shape, such as rapid lowering and braking of load.

SPEC WRITER NOTE: Verify that special motor requirements when required, such as two-speed or explosion proof, are shown on the drawings in the equipment schedules.

ELECTRIC MOTORS

All material and equipment furnished and installation methods shall conform to the requirements of Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC AND STEAM GENERATION EQUIPMENT; Section 26 29 11, MOTOR CONTROLLERS; and, Section 26 05 19, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES. Provide all electrical wiring, conduit, and devices necessary for the proper connection, protection and operation of the systems. Provide special energy efficient premium efficiency type motors as scheduled.

VARIABLE SPEED MOTOR CONTROLLERS

Refer to Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS and Section 26 29 11, MOTOR CONTROLLERS for specifications.

Coordinate variable speed motor controller communication protocol with Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

SPEC WRITER NOTE: Verify that drawings indicate “with bypass contactor” or “without bypass contactor” on all variable frequency drives shown.

Provide variable speed motor controllers with or without a bypass contactor as indicated in contract drawings.

The combination of controller and motor shall be provided by the manufacturer of the driven equipment, such as pumps and fans, and shall be rated for 100 percent output performance. Multiple units of the same class of equipment, i.e. air handlers, fans, pumps, shall be product of a single manufacturer.

Motors shall be premium efficiency type and be approved by the motor controller manufacturer. The controller-motor combination shall be guaranteed to provide full motor nameplate horsepower in variable frequency operation. Both driving and driven motor/fan sheaves shall be fixed pitch.

Controller shall not add any current or voltage transients to the input ac power distribution system, DDC controls, sensitive medical equipment, etc., nor shall be affected from other devices on the ac power system.

SPEC WRITER NOTE: Choose the paragraph “A” below that is appropriate for the project.

EQUIPMENT AND MATERIALS IDENTIFICATION

1. //Use symbols, nomenclature and equipment numbers specified, shown on the contract documents and shown in the maintenance manuals. Identification for piping is specified in Section 09 91 00, PAINTING.//

1. //Use symbols, nomenclature and equipment numbers specified, shown on the contract documents and shown in the maintenance manuals. In addition, provide bar code identification nameplate for all equipment which will allow the equipment identification code to be scanned into the system for maintenance and inventory tracking. Identification for piping is specified in Section 09 91 00, PAINTING.// Interior (Indoor) Equipment: Engraved nameplates, with letters not less than 5 mm (3/16 inch) high of brass with black-filled letters, or rigid black plastic with white letters specified in Section 09 91 00, PAINTING permanently fastened to the equipment. Identify unit components such as coils, filters, fans, etc.

Exterior (Outdoor) Equipment: Brass nameplates, with engraved black filled letters, not less than 5 mm (3/16 inch) high riveted or bolted to the equipment.

Control Items: Label all instrumentation, temperature and humidity sensors, controllers and control dampers. Identify and label each item as they appear on the control diagrams.

Valve Tags and Lists:

HVAC and Mechanical Rooms: Provide for all valves other than for equipment in Section 23 82 00, CONVECTION HEATING AND COOLING UNITS and Section 23 36 00, AIR TERMNAL UNITS.

Valve tags: Engraved black filled numbers and letters not less than 15 mm (1/2 inch) high for number designation, and not less than 6 mm (1/4 inch) for service designation on 19-gauge 40 mm (11/2 inches) round brass disc, attached with brass "S" hook or brass chain.

Valve lists: Typed or printed plastic coated card(s), sized 215 mm (81/2 inches) by 275 mm (11 inches) showing tag number, valve function and area of control, for each service or system. Punch sheets for a 3-ring notebook.

Provide detailed plan for each floor of the building indicating the location and valve number for each valve. Identify location of each valve with a color-coded thumb tack in ceiling.

Ceiling Grid Labels:

50 mm (2 inch) long by 15 mm (1/2 inch) wide by 0.025 mm (1 mil) thick UV resistant metalized polyester label with red border color and black custom lettering on white background interior. Peel and stick adhesive backing. Label and adhesive manufactured specifically for use in equipment inventory tagging.

Custom print labels with above ceiling HVAC equipment numbers.

FIRESTOPPING

Section 07 84 00, FIRESTOPPING specifies an effective barrier against the spread of fire, smoke and gases where penetrations occur for piping and ductwork. Refer to Section 23 07 11, HVAC AND BOILER PLANT INSULATION, for firestop pipe and duct insulation.

GALVANIZED REPAIR COMPOUND

Mil-P-21035B, paint form.

HVAC PIPE AND EQUIPMENT SUPPORTS AND RESTRAINTS

Vibration Isolators: Refer to Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT.

Supports for Roof Mounted Items:

Equipment: Equipment rails shall be galvanized steel, minimum 1.3 mm (18 gauge), with integral baseplate, continuous welded corner seams, factory installed 50 by 100 mm (2 by 4 inches) treated wood nailer, 1.3 mm (18 gauge) galvanized steel counter flashing cap with screws, built-in cant strip, (except for gypsum or tectum deck), minimum height 275 mm (11 inches). For surface insulated roof deck, provide raised cant strip to start at the upper surface of the insulation.

Pipe/duct pedestals: Provide a galvanized Unistrut channel welded to U-shaped mounting brackets which are secured to side of rail with galvanized lag bolts.

Pipe Supports: Comply with MSS SP-58. Type Numbers specified refer to this standard. For selection and application comply with MSS SP-58. Refer to Section 05 50 00, METAL FABRICATIONS, for miscellaneous metal support materials and prime coat painting requirements.

Attachment to Concrete Building Construction:

Concrete insert: MSS SP-58, Type 18.

Self-drilling expansion shields and machine bolt expansion anchors: Permitted in concrete not less than 100 mm (4 inches) thick when approved by the COR for each job condition.

Power-driven fasteners: Permitted in existing concrete or masonry not less than 100 mm (4 inches) thick when approved by the COR for each job condition.

Attachment to Steel Building Construction:

Welded attachment: MSS SP-58, Type 22.

Beam clamps: MSS SP-58, Types 20, 21, 28 or 29. Type 23 C-clamp may be used for individual copper tubing up to 23 mm (7/8 inch) outside diameter.

SPEC WRITER NOTE: Include paragraph below if for new construction (roof deck) only.

//Attachment to Metal Pan or Deck: As required for materials specified in //Section 05 31 00, STEEL DECKING// //Section 05 36 00, COMPOSITE METAL DECKING//.// SPEC WRITER NOTE: Include paragraph below for renovations of existing facilities.

//Attachment to existing structure: Support from existing floor/roof frame.// Attachment to Wood Construction: Wood screws or lag bolts.

Hanger Rods: Hot-rolled steel, ASTM A36/A36M or ASTM A575 for allowable load listed in MSS SP-58. For piping, provide adjustment means for controlling level or slope. Types 13 or 15 turn-buckles shall provide 40 mm (11/2 inches) minimum of adjustment and incorporate locknuts. All-thread rods are acceptable.

Hangers Supporting Multiple Pipes (Trapeze Hangers): Galvanized, cold formed, lipped steel channel horizontal member, not less than 41 mm by 41 mm (15/8 inches by 15/8 inches), 2.7 mm (12 gauge), designed to accept special spring held, hardened steel nuts. Trapeze hangers are prohibited for use for steam supply and condensate piping.

Allowable hanger load: Manufacturers rating less 91 kg (200 pounds).

Guide individual pipes on the horizontal member of every other trapeze hanger with 6 mm (1/4 inch) U-bolt fabricated from steel rod. Provide Type 40 insulation shield, secured by two 15 mm (1/2 inch) galvanized steel bands, or preinsulated calcium silicate shield for insulated piping at each hanger.

Supports for Piping Systems:

Select hangers sized to encircle insulation on insulated piping. Refer to Section 23 07 11, HVAC AND BOILER PLANT INSULATION for insulation thickness. To protect insulation, provide Type 39 saddles for roller type supports or preinsulated calcium silicate shields. Provide Type 40 insulation shield or preinsulated calcium silicate shield at all other types of supports and hangers including those for preinsulated piping.

Piping Systems except High and Medium Pressure Steam (MSS SP-58):

Standard clevis hanger: Type 1; provide locknut.

Riser clamps: Type 8.

Wall brackets: Types 31, 32 or 33.

Roller supports: Type 41, 43, 44 and 46.

Saddle support: Type 36, 37 or 38.

Turnbuckle: Types 13 or 15. Preinsulate.

U-bolt clamp: Type 24.

Copper Tube:

Hangers, clamps and other support material in contact with tubing shall be painted with copper colored epoxy paint, plastic coated or taped with non-adhesive isolation tape to prevent electrolysis.

For vertical runs use epoxy painted or plastic-coated riser clamps.

For supporting tube to strut: Provide epoxy painted pipe straps for copper tube or plastic inserted vibration isolation clamps.

Insulated Lines: Provide pre-insulated calcium silicate shields sized for copper tube.

Supports for plastic piping: As recommended by the pipe manufacturer with black rubber tape extending one inch beyond steel support or clamp.

High and Medium Pressure Steam (MSS SP-58):

Provide eye rod or Type 17 eye nut near the upper attachment.

Piping 50 mm (2 inches) and larger: Type 43 roller hanger. For roller hangers requiring seismic bracing provide a Type 1 clevis hanger with Type 41 roller attached by flat side bars.

//Piping with Vertical Expansion and Contraction:

Movement up to 20 mm (3/4 inch): Type 51 or 52 variable spring unit with integral turn buckle and load indicator.

Movement more than 20 mm (3/4 inch): Type 54 or 55 constant support unit with integral adjusting nut, turn buckle and travel position indicator.// Convertor and Expansion Tank Hangers: May be Type 1 sized for the shell diameter. Insulation where required will cover the hangers.

SPEC WRITER NOTE: Include below for pipe sizes larger than 50 mm (2 inches).

//Pre-insulated Calcium Silicate Shields:

Provide 360-degree water resistant high density 965 kPa (140 psig) compressive strength calcium silicate shields encased in galvanized metal.

Pre-insulated calcium silicate shields to be installed at the point of support during erection.

Shield thickness shall match the pipe insulation.

The type of shield is selected by the temperature of the pipe, the load it must carry, and the type of support it will be used with.

Shields for supporting chilled or cold water shall have insulation that extends a minimum of 25 mm (1 inch) past the sheet metal. Provide for an adequate vapor barrier in chilled lines.

The pre-insulated calcium silicate shield shall support the maximum allowable water filled span as indicated in MSS SP-58. To support the load, the shields may have one or more of the following features: structural inserts 4138 kPa (600 psig) compressive strength, an extra bottom metal shield, or formed structural steel (ASTM A36/A36M) wear plates welded to the bottom sheet metal jacket.

Shields may be used on steel clevis hanger type supports, roller supports or flat surfaces.// //Seismic Restraint of Piping and Ductwork: Refer to Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. Comply with MSS SP-127.//

PIPE PENETRATIONS

Install sleeves during construction for other than blocked out floor openings for…