MHRD_HVAC_Combined_Specifications.doc

USDA FOREST SERVICE PROJECT SPECIFICATIONS

SECTION 01 11 00 - SUMMARY OF WORK

PART 1 - GENERAL

1.01

SCOPE

A. This work consists of preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and operations that must be performed or that cause costs to be incurred prior to beginning work on the various items on the project site. It shall also be the responsibility of the contractor to properly remove and dispose of all existing equipmint and incidental refuse created by this project. Once removed from service all material shall become the property of the contractor.

B. The project consists of the replacement of all mechanical equipment (furnaces, heat pumps, and A/C condensing units) in the main office building at the Mt. Hough Ranger District Office on the Plumas National forest. All electrical, plumbing, sheetmetal, etc. work shall be considered incidental to the replacement of the equipment. Other infrastructure (including, but not limited to duct work, registers, thermostats, etc.) shall remain in place as part of the system to the maximum extent possible.

1.01 location

A. The Plumas National Forest Mt. Hough Ranger District is in Quincy, CA. From Oroville, CA head north on CA-70 for 5.6 miles and take a slight right towards Quincy, CA. Continue on CA-70 through the Feather River Canyon for 75 miles. Just before you reach the town of Quincy, turn right at the Forest Service Station. The address is 39696 CA Highway 70.

1.02 GENERAL SITE CONDITIONS AND WEATHER

A. The elevation of the Mt. Hough Ranger District Office in Quincy, CA is approximately 3,500 feet above sea level. The construction site at this elevation typically experiences heavy rainfall and snow in the months of November through April.

B. USE OF PREMISES:

a) General: Contractor shall have limited use of area surrounding buildings for construction operations, including use of Project site, during construction period. The building will remain a fully-operational government office and public services will continue while work is being performed. Delivery and staging areas shall be approved by the Contracting Officer prior to commensing work.

b) The contractor shall have access to water provided by the government. The contractor shall be responsible for providing all sanitation services for contractor’s employees. Contractor may be responsible to provide all power necessary in order to perform work.

c) Contractor shall at all times conduct his or her operations to ensure the least inconvenience to the public and employees. Partial building closure may be permitted, when required, upon written approval of the Contracting Officer (CO).

d) Confine storage of materials to areas as approved by the CO.

e) Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public and government employees during all construction operations. Contractor shall minimize disturbance of all undisturbed areas.

f) Preservation of Natural Features: Confines all operations to work limits of the project. Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to the Government.

1. Provide temporary barriers to protect existing trees and plants and root zones.

2. Do not remove, injure, or destroy trees or other plants without prior approval. Consult with CO and remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guys to existing trees.

C. Existing Utilities: Notify CO and utility companies of proposed locations and times for excavation.

1. Contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the Government.

2. Interruption of Existing Utility Service: Notify CO, 48 hours in advance of any interruption of existing utilities.

MEALS AND LODGING

A. Meals and lodging are commercially available in the Town of Quincy. Meals or lodging will not be available at Forest Service facilities.

1.04 camping

A. Free camping in campgrounds will not be permitted.

1.05 construction sequence

A. There is no specified construction sequence or season for this project.

1.06 Field verification

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products. Dimensions on drawings are approximate.

PART 2 - PRODUCTS (Not Used) PART 3 - EXECUTION (Not Used) pART 4 – mEASUREMENT AND pAYMENT

4.01 Measurement and Payment:

A.

The accepted quantities will be paid for at the contract unit price for mobilization.

B.

Progress payments will be made as follows:

1.

The Government will pay to the Contractor in the first progress payment the total premium paid by the Contractor to obtain bonds. This payment shall not be in addition to the contract price and will be included in mobilization pay item.

2.

When 5 percent or more of the original contract amount is earned from other pay items, 50 percent of the amount for mobilization, or 5 percent of the original contract amount, whichever is less, will be paid.

3.

When 10 percent or more of the original contract amount is earned from other pay items, 100 percent of the amount for mobilization, or 10 percent of the original contract amount, whichever is less, will be paid.

4.

Upon completion of all work on the project, any unpaid amount for Item 01, Mobilization, will be paid.

C.

The total of all payments will not exceed the original contract amount for mobilization.

01 1100: MOBILIZATION (INCLUDING BONDING): LUMP SUM (LS)

END OF SECTION 011100

SECTION 01 74 23 - PROJECT CLEAN UP

PART 1 ‑ GENERAL

1.01

DESCRIPTION

A.

This section covers the disposal of excess material from building construction or any other operation in which waste is generated.

1.02

MEASUREMENT AND PAYMENT

A.

No separate payment shall be made for work specified in this section. Compensation for this work will be considered included in the payment for the completed project.

PART 2 ‑ PRODUCTS

Not Applicable

PART 3 ‑ EXECUTION

3.01

WORKMANSHIP

A.

The Contractor shall provide refuse containers and proper disposal at weekly intervals for solid wastes generated by Contractor’s employees.

B.

All debris and unused material shall be removed from the site. All debris shall be disposed of off National Forest land in accordance with local regulations. Site shall be restored to as near its original condition as possible.

C.

Burning of material is not allowed.

D.

At substantial completion the building shall be swept clean of all debris and dust. Windows and roof shall be cleaned of all dust and marks.

2. END OF SECTION 01 74 23

SECTION 23 00 00 - HVAC EQUIPMENT

3. General

3.1 Description

1 Provide material, labor and complete system described as shown.

3.2 Quality Assurance

1 References:

A. American Society for Testing Materials (ASTM) publications:

2 B32 Solder Metal

3 B88 Seamless Copper Water Tube

4 National Electrical Manufacturers Association (NEMA)

5 International Conference of Building Officials (ICBO)

6 Underwriters' Laboratories, Incorporated (UL)

7 Materials:

8 Except as otherwise permitted by specification designation, provide new materials of standard make and current manufacture. Where applicable, conform to ASME, ASTM, NFPA or other requirements and have UL listing. Select Equipment to fit space provided.

9 Workmanship:

10 Run piping parallel to building, keep as inconspicuous as possible, and grade evenly. Set equipment plumb and true with easy access for maintenance. Off‑set piping as required to provide for proper and necessary clearances. Provide adequate clearances for repair and service of mechanical equipment.

11 Coordination:

12 Maintain qualified supervisory personnel on job to coordinate work and space utilization with other trades involved. Supervisor must be completely familiar with operation and requirements of equipment being installed and be responsible for job during entire construction period. Prior to request for final review, be certain that equipment and controls are functioning properly.

4. PRODUCTS

4.1 Common Motor Requirements for HVAC Equipment

1 Division 26 specifies wiring, provides disconnect switches, mounts starters and makes line voltage connections to equipment furnished under Division 23, unless noted under specific item. Division 23 provides control wiring, except as indicated, to conform with Division 26 wiring methods.

2 Motor Starters

A. Supply three phase electrical equipment and single phase equipment 1/2 HP and over with magnetic starter. Control voltage to be 24 or 120 volt, coordinate with contractor installing controls. Provide internal control transformer if required. Provide hand-off-auto switch on face of enclosure. Furnish one auxiliary interlock per starter if required. Calculate starter heater coil to Class B motor curves and provide with ambient compensation. Provide protection for all three phases on three phase current under a single NEMA enclosure.

B. Provide appropriate enclosure for each starter. Unless otherwise specified, starter for each item of rooftop or exposed to weather equipment to be weatherproof NEMA 4 enclosure.

3 Electric Motors

A. All motors shall conform to applicable NEMA standards.

B. Provide electric motors designed for the specific application and duty applied, and to deliver rated horsepower without exceeding temperature ratings when operated on electric power systems with a combined variation in voltage and frequency not more than plus or minus 10% of rated voltage.

C. Size motors for 1.15 service factor, and not to exceed 40 degrees C temperature rise above ambient during continuous duty operation at 100% of rated voltage.

D. All electric motors shall be sized to meet the horsepower requirements of the driven unit at design characteristics including all V‑belt and/or drive and coupling losses which are incurred without loading the motor beyond its nameplate horsepower rating. Where V‑belt drives are employed the motor horsepower nameplate rating shall not be less than 120% of the driven unit brake horsepower requirements.

E. Bearings shall be bronze sleeve type or ball type with zerk type lubricating fittings extended to an easily accessible location for field servicing.

F. All motors except direct connected motors shall be furnished complete with adjustable slide rails.

G. All motors shall be single speed and operate at 1750 RPM unless specified otherwise.

4 Single Phase Motors:

A. Unless specifically noted otherwise, all motors less than 1/2 horsepower shall be capacitor start type, drip proof, designed for use with 120 volts, 60 Hertz alternating current. Motors shall be internally thermally protected.

B. All electric motors 1/2 horsepower and greater (and smaller motors so noted) shall be general purpose, drip proof squirrel cage induction type, designed for use with 60 Hertz alternating current, unless specifically indicated otherwise.

C. See Division 26 for electrical power requirements of motors.

5 Electrical Characteristics

A. Conform with voltage, phase and current limitations shown on Division 26 drawings. Should equipment approved and furnished under these specifications require additional wiring or electrical service beyond that required by specified equipment, arrange with Division 26 to provide addition at Contractor expense.

4.2 Hangers and Supports for HVAC Piping and Equipment

1 Piping: Provide galvanized hangers and shields for the pipe supported. Provide copper plated hangers and guides in contact with copper pipe. Increase pipe hanger size for insulation such that insulation is continuous thru hanger. Provide 16 gauge insulation shield for 4" and larger pipe and 20 gauge for 3" and smaller. Length of the shield 6 times nominal pipe diameter except minimum length 6 inches. Hanger types permitted are as follows:

2 Clevis - for all pipes - Grinnell Fig. 260.

3 .“J” hanger - for all pipes - Superstrut C‑711.

4 Swivel Ring - for non-insulated pipe - Grinnell Fig. 70.

5 Swivel Ring w/ Shield - for insulated pipes 2" and smaller - Michigan Hanger Co. No. 103.

6 Riser Clamps - for steel and iron pipe - Grinnell Fig. 261, for copper pipe - Grinnell Fig. 261c

7 Trapeze support systems: Hot rolled steel channel with electrogalvanized finish, clips, fasteners, and clamps with matching finish by same manufacturer.

8 For copper pipe provide neoprene strip between pipe and clamp - Superstrut S‑716, plastic tape alone is not acceptable.

9 For insulated pipe provide strap and shield sized for O.D. of insulation - Superstrut C‑708 with C‑790, universal clamps attached directly to pipe are not permitted.

4.3 Identification for HVAC Piping and Equipment

1 Valves: Provide numbered brass disc attached to each valve. Valve numbers in separate series for each section of specification.

2 Equipment: Provide name plates of black phenolic resin with white 1/2" high letters attached to or adjacent to each piece of equipment including but not limited to the following: pumps, air handling units, starters, and switches. Do not use marking pen or Dymo.

3 Piping: Band all piping with heat resistant adhesive backed PVC material, width, frequency, color and lettering to conform to ANSI A13.1. Indicate fluid in piping and direction of flow. Provide in mechanical, fan and storage rooms and exposed in other finished areas at each valve, each change of direction, 20 feet apart on straight runs and at locations where piping enters or leaves space. In concealed areas band at valves, pipe junctions and 40 feet apart on straight runs.

5. EXECUTION

5.1 Installation

1 Install where indicated per manufacturer's recommendations.

5.2 Pipe Supports

1 Locate hangers, supports, and accessories to support pipelines, valves, and additional concentrated loads.

2 Single Pipes: Support horizontal runs of steel, copper pipe under 2" and cast-iron soil pipe on suitable hangers spaced at not more than 5 feet on centers. Support all steel and copper piping 2" and larger at not more than 10 feet on centers.

3 Independently support piping at equipment, such as duct mounted coils, so that no weight is supported by equipment.

4 Do not spring or bend pipe to fit conditions or to make up joints. Support piping in manner to prevent binding, undue swing, and transmission of vibration to structure. Provide sway bracing where hanger rods are longer than 12" and at maximum spacing of 40 feet.

5 Install hangers for insulated piping outside insulation using high density section (6# per cubic foot) of insulation and sheet metal shield.

6 Install minimum of one hanger or brace within two (2) feet from each change of direction in piping.

7 Trapeze Hangers: Where pipes are clustered, parallel, and in same plane, support by trapeze hangers. Provide rods and channel sized to suit load imposed.

5.3 Sleeves

1 Provide sleeves where pipes pass through walls, floors, or ceilings. Make sleeves as follows:

2 In bearing walls, foundations, masonry or concrete walls and slabs, use schedule 40 black steel pipe poured in place.

3 In frame or similar construction, use 20 gauge galvanized sheet metal with edges turned 1/2 inch.

4 Install sleeves flush with surfaces, except in mechanical rooms or on any wet floor where seepage may occur, install 1 inch above floor.

5 Waterproof sleeves through building exterior skin, including walls, floors and roofs, to prevent leakage.

6 Size sleeves for insulated piping to allow continuous insulation through sleeve.

7 Where sleeves pass through fire rated assemblies:

8 Pack annular space between pipe and sleeve with intumescent material capable of expanding up to 8 to 10 times when exposed to 250 degree F temperature or higher, UL classified with I.C.B.O., B.O.C.A.I., and S.B.C.C.I. (NRB 243) approved ratings to 3 hours per ASTM E814 (UL1479).

9 Acceptable material: 3M Fire Barrier Caulk, Putty, Strip and Sheet, or Dow Corning fire stop equivalent putty No. 2000 and 2001 foam. Install escutcheon at exposed penetrations to cover sleeve and spacing sealant.

5.4 Typical Piping

1 Provide clearflow dielectric waterway couplings to prevent electrolysis between dissimilar metals, when use of dissimilar metals cannot be avoided in one system.

2 Provide air vents at high points and where piping turns down in direction of flow.

3 Close openings in pipes with appropriate caps, plugs, or covers during storage and progress of work to preclude introduction of contaminants.

4 Slope pipelines and provide low point drains for piping and equipment.

5 Provide valves and unions adjacent to tanks, batteries of plumbing fixtures and equipment, for disconnect purposes. Install valves with stems vertical wherever possible, and in no case with stems below horizontal.

6 Provide gate valve and check valve on cold water supply to domestic water make-up connections.

7 Ream ends of pipe to full diameter.

8 Provide pipe anchors, swing joints, and expansion compensators as required to control expansion of pipelines.

9 Reduce pipe sizes using reducing tees or reducing fittings. Bushings not permitted except on tanks and similar equipment.

10 Provide escutcheons on pipes passing through walls, floors, and ceilings in finished areas and where piping is in counters, closets, or cabinets, and subject to view when doors are open. Cover pipe sleeve and secure plate in position.

11 Testing:

12 Test all piping to a pressure equal to 1.5 times the working pressure of the system. Hold test pressure for minimum of 4 hours without leakage. Arrange for the Owner’s Representative to witness the tests. Provide written report.

13 Leave piping exposed (unconcealed) for observation during testing. Expose any work that was covered or concealed before testing for the duration of the testing period.

14 Repair leaks & defects discovered during testing with new material and re-test until satisfactory results are obtained.

15 Testing of portions of the entire system is permitted provided clear documentation is included with the test reports showing the extent of the piping under test.

5.5 Threaded Pipe

1 Cut threads true and of depth of make up properly without leaks.

2 Make connections to show at least two threads and not more than four threads when tight.

3 Make up joints with Teflon tape only for domestic water and hydronic systems, as recommended by tape manufacturer, or as specified for individual piping systems.

4 Use approved type pipe compound for gas and oil piping.

5.6 Cleaning

1 Clean exposed, uninsulated piping to remove shipping labels, flux, solder drips, pipe dope, dirt, oil, loose scale or other contaminants.

2 Thoroughly flush out and clean each piping system. Be aware of obstructions in piping, such as flow control valves, strainers, etc., during cleaning process. Make provisions to handle these items using bypasses, back-flushing, leaving equipment out and installing temporary connections until piping is clean or whatever is required to accomplish complete cleaning. Clean ductwork in this contract prior to installation of grilles.

3 Wash out entire environmental water system, using one pound of tri‑sodium phosphate per 50 gal. of system water. Circulate through system for 8 hours. Drain and refill using 1 lb. soda ash per 50 gal. of water. Check and maintain PH of system at 7.5 to 9.0. Add sodium nitrite to maintain 500 PPM. Employ services of independent testing laboratory to certify PH and nitrite treatment. Clean each strainer and flow control valve.

5.7 Lubrication

1 Lubricate equipment properly per manufacturer's recommendations prior to operating and placing in service.

5.8 Air Balancing

1 Adjust all dampers to deliver air volumes designated on plans. Lock damper quadrants and mark position. Log all air volumes before and after adjustment at each air inlet, outlet and each fan.

2 Adjust fan drives to obtain air volumes designated on plans. If necessary, replace drives to obtain required fan performance. Log "turns open" on adjustable fan drive sheave. Check amp draw at each phase and log, along with motor nameplate amperage. Final adjustment of fans not to exceed motor nameplate amperage.

3 Do not begin balancing until mechanical systems are completed and in full working order.

4 Submit logs in report form to Architect prior to final acceptance of project. Report to include the following:

5 Air volumes of each outlet & return before balancing.

6 Air volumes of each outlet & return after balancing.

7 Motor nameplate information (Manufacturer, RPM, HP, Maximum Ampere Draw) of each fan motor.

8 Operating Ampere Draw of each fan motor before and after balancing.

9 Shaft speed (RPM) for each fan before and after balancing.

10 For outside air damper adjustments provide temperature measurements for Outside, Return, & Mixed air to show that damper setting has been correctly adjusted. Report date and time when measurements were made.

End of Section

SECTION 230130 - EXISTING HVAC AIR DISTRIBUTION SYSTEM CLEANING

6. PART 1 - GENERAL

6.1 RELATED DOCUMENTS

1 Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

6.2 SUMMARY

1 Section includes cleaning existing HVAC air-distribution equipment, ducts, plenums, and system components.

6.3 DEFINITIONS

1 ACAC: American Council for Accredited Certification.

2 AIHA-LAP: American Industrial Hygiene Association Lab Accreditation Program

3 ASCS: Air systems cleaning specialist.

4 CESB: Council of Engineering and Scientific Specialty Boards.

5 CMI: Certified Microbial Investigator.

6 CMC: Certified Microbial Consultant.

7 CMR: Certified Microbial Remediator.

8 CMRS: Certified Microbial Remediation Supervisor.

9 EMLAP: Environmental Microbiology Laboratory Accreditation Program.

10 IEP: Indoor Environmental Professional.

11 IICRC: Institute of Inspection, Cleaning, and Restoration Certification.

12 NADCA: National Air Duct Cleaners Association.

6.4 ACTION SUBMITTALS

1 Product Data:

A. Cleaning agents

B. Antimicrobial surface treatments.

6.5 INFORMATIONAL SUBMITTALS

1 Qualification Data:

A. For an ASCS.

B. For an IEP.

C. For a CMR and a CMRS.

2 Field Quality-Control Reports:

A. Project's existing conditions.

B. Evaluations and recommendations, including cleanliness verification.

C. Strategies and procedures plan.

6.6 CLOSEOUT SUBMITTALS

1 Post-Project report.

6.7 QUALITY ASSURANCE

1 UL Compliance: Comply with UL 181 and UL 181A for fibrous-glass ducts.

2 Cleaning Conference: Conduct conference at Project site.

A. Review methods and procedures related to HVAC air-distribution system cleaning, including, but not limited to, review of the cleaning strategies and procedures plan.

7. PART 2 - PRODUCTS

7.1 HVAC CLEANING AGENTS

1 Description:

A. Formulated for each specific soiled coil condition that needs remedy.

B. Will not corrode or tarnish aluminum, copper, or other metals.

7.2 ANTIMICROBIAL SURFACE TREATMENT

1 Description: Specific product selected shall be as recommended by the IEP based on the specific antimicrobial needs of the specific Project conditions.

A. Formulated to kill and inhibit growth of microorganisms.

B. EPA-registered for use in HVAC systems and for the specific application in which it will be used.

C. Have no residual action after drying, with zero VOC off-gassing.

D. OSHA compliant.

E. Treatment shall dry clear to allow continued visual observation of the treated surface.

8. PART 3 - EXECUTION

8.1 PREPARATION

1 Inspect HVAC air-distribution equipment, ducts, plenums, and system components to determine appropriate methods, tools, and equipment required for performance of the Work.

2 Cleaning Plan: Prepare a written plan for air-distribution system cleaning that includes strategies and step-by-step procedures. At a minimum, include the following:

A. Supervisor contact information.

B. Work schedule, including location, times, and impact on occupied areas.

C. Methods and materials planned for each HVAC component type.

D. Required support from other trades.

E. Equipment and material storage requirements.

F. Exhaust equipment setup locations.

3 Existing Conditions Report: Prepare a written report that documents existing conditions of the systems and equipment. Include documentation of existing conditions, including inspection results and photo images.

A. Prepare written report listing conditions detrimental to performance of the Work.

4 Proceed with work only after conditions detrimental to performance of the Work have been corrected.

5 Use the existing service openings, as required for proper cleaning, at various points of the HVAC system for physical and mechanical entry and for inspection.

6 Comply with NADCA ACR, "Guidelines for Constructing Service Openings in HVAC Systems" Section.

7 Mark the position of manual volume dampers and air-directional mechanical devices inside the system prior to cleaning.

8.2 CLEANING

1 Comply with NADCA ACR, including items identified as "recommended," "advised," and "suggested."

2 Perform electrical lockout and tagout according to Owner's standards or authorities having jurisdiction.

3 Remove non-adhered substances and deposits from within the HVAC system.

4 Complete cleaning in accordance with Owner-Contractor agreed-upon scope of work.

5 Systems and Components to Be Cleaned: All air-moving and -distribution equipment.

6 Systems and Components to Be Cleaned:

A. Air devices for supply and return air: All supply air and return air diffusers and grilles.

B. Ductwork:

1. Supply-air ducts, including turning vanes, to the furnaces.

2. Return-air ducts to the furnaces.

3. Exhaust-air ducts.

4. Transfer ducts.

C. Casings.

D. Exhaust fans and power ventilators.

E. Filters and filter housings.

F. Gravity ventilators.

7 Collect debris removed during cleaning. Ensure that debris is not dispersed outside the HVAC system during the cleaning process.

8 Control odors and mist vapors during the cleaning and restoration process.

9 Mark the position of manual volume dampers and air-directional mechanical devices inside the system prior to cleaning. Restore them to their marked position on completion of cleaning.

10 System components shall be cleaned so that all HVAC system components are visibly clean. On completion, all components must be returned to those settings recorded just prior to cleaning operations.

11 Clean all air-distribution devices, registers, grilles, and diffusers.

12 Air-Distribution Systems:

A. Create service openings in the HVAC system as necessary to accommodate cleaning.

B. Mechanically clean air-distribution systems specified to remove all visible contaminants, so that the systems are capable of passing the HVAC System Cleanliness Tests (see NADCA ACR).

13 Debris removed from the HVAC system shall be disposed of according to applicable Federal, state, and local requirements.

14 Mechanical Cleaning Methodology:

A. Source-Removal Cleaning Methods: The HVAC system shall be cleaned using source-removal mechanical cleaning methods designed to extract contaminants from within the HVAC system and to safely remove these contaminants from the facility. No cleaning method, or combination of methods, shall be used that could potentially damage components of the HVAC system or negatively alter the integrity of the system.

1. Use continuously operating vacuum-collection devices to keep each section being cleaned under negative pressure.

2. Cleaning methods that require mechanical agitation devices to dislodge debris that is adhered to interior surfaces of HVAC system components shall be equipped to safely remove these devices. Cleaning methods shall not damage the integrity of HVAC system components or damage porous surface materials, such as duct and plenum liners.

B. Cleaning Mineral-Fiber Insulation Components:

1. Fibrous-glass thermal or acoustical insulation elements present in equipment or ductwork shall be thoroughly cleaned with HEPA vacuuming equipment while the HVAC system is under constant negative pressure and shall not be permitted to get wet according to NADCA ACR.

2. Cleaning methods used shall not cause damage to fibrous-glass components and will render the system capable of passing the HVAC System Cleanliness Tests (see NADCA ACR).

3. Fibrous materials that become wet shall be discarded and replaced.

15 Application of Antimicrobial Treatment:

A. Apply antimicrobial agents and coatings if active fungal growth is determined to exist. Apply antimicrobial agents and coatings according to manufacturer's written recommendations and EPA registration listing after the removal of surface deposits and debris.

B. Apply antimicrobial treatments and coatings after the system is rendered clean.

C. Apply antimicrobial agents and coatings directly onto surfaces of interior ductwork.

D. Microbial remediation shall be performed by an experienced and qualified personnel.

8.3 CLEANLINESS VERIFICATION

1 Verify cleanliness according to NADCA ACR, "Verification of HVAC System Cleanliness" Section.

2 Verify HVAC system cleanliness after mechanical cleaning and before applying any treatment or introducing any treatment-related substance to the HVAC system, including biocidal agents and coatings.

3 Surface-Cleaning Verification: Perform visual inspection for cleanliness. If no contaminants are evident through visual inspection, the HVAC system shall be considered clean. If visible contaminants are evident through visual inspection, those portions of the system where contaminants are visible shall be re-cleaned and subjected to re-inspection for cleanliness.

4 Photographic Documentation: Provide before and after photos of the sample ductwork.

8.4 RESTORATION

1 Restore and repair HVAC air-distribution equipment, ducts, plenums, and components according to NADCA ACR, "Restoration and Repair of Mechanical Systems" Section.

2 Replace damaged insulation.

3 Ensure that closures do not hinder or alter airflow.

4 Restore manual volume dampers and air-directional mechanical devices inside the system to their marked position on completion of cleaning.

8.5 PROJECT CLOSEOUT

1 Post-Project Report:

A. Post-cleaning laboratory results if any.

B. Post-cleaning photo images.

C. Post-cleaning verification summary.

END OF SECTION

SECTION 23051 - MOTOR REQUIREMENTS FOR HVAC EQUIPMENT

9. PART 1 - GENERAL

9.1 RELATED DOCUMENTS

1 Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

9.2 SUMMARY

1 Section includes general requirements for single-phase and polyphase, general-purpose, horizontal, small and medium, squirrel-cage induction motors for use on ac power systems up to 600 V and installed at equipment manufacturer's factory or shipped separately by equipment manufacturer for field installation.

9.3 COORDINATION

1 Coordinate features of motors, installed units, and accessory devices to be compatible with the following:

A. Motor controllers.

B. Torque, speed, and horsepower requirements of the load.

C. Ratings and characteristics of supply circuit and required control sequence.

D. Ambient and environmental conditions of installation location.

10. PART 2 - PRODUCTS

10.1 GENERAL MOTOR REQUIREMENTS

1 Comply with NEMA MG 1 unless otherwise indicated.

2 Comply with IEEE 841 for severe-duty motors.

10.2 MOTOR CHARACTERISTICS

1 Duty: Continuous duty at ambient temperature of 40 deg C and at altitude of 3300 feet above sea level.

2 Capacity and Torque Characteristics: Sufficient to start, accelerate, and operate connected loads at designated speeds, at installed altitude and environment, with indicated operating sequence, and without exceeding nameplate ratings or considering service factor.

10.3 POLYPHASE MOTORS

1 Description: NEMA MG 1, Design B, medium induction motor.

2 Efficiency: Energy efficient, as defined in NEMA MG 1.

3 Service Factor: 1.15.

4 Multispeed Motors: Variable torque.

A. For motors with 2:1 speed ratio, consequent pole, single winding.

B. For motors with other than 2:1 speed ratio, separate winding for each speed.

5 Multispeed Motors: Separate winding for each speed.

6 Rotor: Random-wound, squirrel cage.

7 Bearings: Regreasable, shielded, antifriction ball bearings suitable for radial and thrust loading.

8 Temperature Rise: Match insulation rating.

9 Insulation: Class F.

10 Code Letter Designation:

A. Motors 15 HP and Larger: NEMA starting Code F or Code G.

B. Motors Smaller than 15 HP: Manufacturer's standard starting characteristic.

11 Enclosure Material: Cast iron for motor frame sizes 324T and larger; rolled steel for motor frame sizes smaller than 324T.

10.4 POLYPHASE MOTORS WITH ADDITIONAL REQUIREMENTS

1 Motors Used with Reduced-Voltage and Multispeed Controllers: Match wiring connection requirements for controller with required motor leads. Provide terminals in motor terminal box, suited to control method.

10.5 SINGLE-PHASE MOTORS

1 Motors larger than 1/20 hp shall be one of the following, to suit starting torque and requirements of specific motor application:

A. Permanent-split capacitor.

B. Split phase.

C. Capacitor start, inductor run.

D. Capacitor start, capacitor run.

2 Multispeed Motors: Variable-torque, permanent-split-capacitor type.

3 Bearings: Prelubricated, antifriction ball bearings or sleeve bearings suitable for radial and thrust loading.

4 Motors 1/20 HP and Smaller: Shaded-pole type.

5 Thermal Protection: Internal protection to automatically open power supply circuit to motor when winding temperature exceeds a safe value calibrated to temperature rating of motor insulation. Thermal-protection device shall automatically reset when motor temperature returns to normal range.

10.6 DAMPER ACTUATORS

1 Control damper actuators shall be furnished by the Control System Contractor. Two-position or proportional electric actuators shall be direct-mount type sized to provide a minimum of 5 in-lb torque per square foot of damper area. Damper actuators shall be spring return type. Operators shall be heavy-duty electronic type for positioning automatic dampers in response to a control signal. Motor shall be of sufficient size to operate damper positively and smoothly to obtain correct sequence as indicated. All applications requiring proportional operation shall utilize truly proportional electric actuators. Honeywell is basis of design.

11. EXECUTION (Not Applicable)

End of Section

SECTION 230593 Testing, adjusting, and balancing for hvac

12. GENERAL

12.1 SECTION REQUIREMENTS

1 Submittals:

A. TAB reports.

2 TAB Report Forms: Standard TAB contractor's forms approved by FS.

3 Perform TAB after leakage and pressure tests on air distribution systems have been satisfactorily completed.

4 Related Sections:

A. Section 230000-Common Work for HVAC.

13. PRODUCTS (Not Used)

14. EXECUTION

14.1 EXAMINATION

1 Examine the Contract Documents to become familiar with Project requirements and to discover conditions in systems' designs that may preclude proper TAB of systems and equipment.

2 Examine existing system plans and designed air flow rates to the spaces.

3 Examine the HVAC systems and equipment.

4 Examine HVAC equipment and filters and verify that bearings are greased, belts are aligned and tight, and equipment with functioning controls is ready for operation.

5 Examine terminal units, such as variable-air-volume boxes, and verify that they are accessible and their controls are connected and functioning.

6 Examine automatic temperature system components to verify the following:

A. Dampers, valves, and other controlled devices are operated by the intended controller.

B. Thermostats are located to avoid adverse effects of sunlight, drafts, and cold walls.

C. Sensors are located to sense only the intended conditions.

D. Changeover from heating to cooling mode occurs according to indicated values.

7 Report deficiencies discovered before and during performance of test and balance procedures.

14.2 GENERAL PROCEDURES FOR TESTING AND BALANCING

1 Cut insulation, ducts, and equipment cabinets for installation of test probes to the minimum extent necessary for TAB procedures. After testing and balancing, patch probe holes in ducts with same material and thickness as used to construct ducts. Install and join new insulation that matches removed materials. Restore insulation, coverings, vapor barrier, and finish.

2 Mark equipment and balancing devices, including damper-control positions, valve position indicators, fan-speed-control levers, and similar controls and devices, with paint or other suitable, permanent identification material to show final settings.

3 Take and report testing and balancing measurements in inch-pound (IP) units.

14.3 GENERAL PROCEDURES FOR BALANCING AIR SYSTEMS

1 Prepare schematic diagrams of systems' "as-built" duct layouts.

2 Verify that motor starters are equipped with properly sized thermal protection.

3 Check for airflow blockages.

4 Check condensate drains for proper connections and functioning.

5 Check for proper sealing of air-handling unit components.

6 Check for proper sealing of air duct system.

14.4 TOLERANCES

1 Set HVAC system airflow and water flow rates within the following tolerances:

A. Supply, Return, and Exhaust Fans and Equipment with Fans: Plus or minus 10 percent.

B. Air Outlets and Inlets: Plus or minus 10 percent.

END OF SECTION

SECTION 232300 - Refrigration Piping

15. PART 1 - GENERAL

15.1 SECTION REQUIREMENTS

1 Submittals:

A. Product Data: For each type of valve and refrigerant piping specialty indicated. Include pressure drop based on manufacturer's test data.

16. PRODUCTS

16.1 PERFORMANCE REQUIRMENTS

1 Comply with ASME B31.5, "Refrigerant Piping," and with ASHRAE 15, "Safety Code for Mechanical Refrigeration."

16.2 TUBES AND FITTINGS

1 Copper Tube: ASTM B 88, Types K and L and ASTM B 280, Type ACR.

2 Wrought-Copper Fittings and Unions: ASME B16.22.

3 Solder Filler Metals: ASTM B 32. Use 95-5 tin antimony or alloy HB solder to join copper socket fittings on copper pipe.

4 Brazing Filler Metals: AWS A5.8.

16.3 VALVES AND SPECIALTIES

1 Thermostatic Expansion Valve: Comply with ARI 750.

A. Forged brass or steel body, stainless-steel internal parts, copper tubing filled with refrigerant charge for 40 deg F suction temperature; 450-psig working pressure, and 240 deg F operating temperature.

2 Solenoid Valves: Comply with AHRI 760 and UL 429; listed and labeled by a Nationally Recognized Testing Laboratory.

A. Plated steel body and bonnet, 240 deg F temperature rating, 400-psig working pressure, 240 deg F operating temperature; and 24-V, normally closed holding coil.

3 Straight-Type Strainers:

A. Welded steel with corrosion-resistant coating and 100-mesh, stainless-steel screen with socket ends; 500-psig working pressure and 275 deg F working temperature.

4 Moisture/Liquid Indicators:

A. Forged brass body, 500-psig operating pressure, 240 deg F operating temperature; with replaceable, polished, optical viewing window and color-coded moisture indicator.

5 Replaceable-Core Filter Dryers: Comply with AHRI 730.

A. Steel shell with ductile-iron cover; 500-psig operating pressure; 240 deg F operating temperature.

6 Permanent Filter Dryers: Comply with AHRI 730.

A. Steel shell with ductile-iron cover; 500-psig operating pressure; 240 deg F operating temperature.

7 Welded steel with corrosion-resistant coating and socket ends; 500-psig operating pressure; 240 deg F operating temperature.

17. PART 3 - EXECUTION

17.1 3.1

INSTALLATION

1 Comply with requirements in Section 230500 "Common Work Results for HVAC" for basic piping installation requirements.

2 Install wall penetration system at each pipe penetration through foundation wall. Make installation watertight. Comply with requirements in Section 230500 "Common Work Results for HVAC" for wall penetration systems.

3 Install refrigerant piping and charge with refrigerant according to ASHRAE 15.

4 Belowground, install copper tubing in PVC conduit. Vent conduit outdoors.

5 Insulate suction lines to comply with Title 24 requirements.

6 Slope refrigerant piping as follows:

A. Install horizontal hot-gas discharge piping with a uniform slope downward away from compressor.

B. Install horizontal suction lines with a uniform slope downward to compressor.

C. Install traps and double risers to entrain oil in vertical runs.

D. Liquid lines may be installed level.

7 Install solenoid valves upstream from each thermostatic expansion valve. Install solenoid valves in horizontal lines with coil at top.

8 Install thermostatic expansion valves as close as possible to distributors on evaporator coils.

9 Install moisture/liquid indicators in liquid line at the inlet of the thermostatic expansion valve or at the inlet of the evaporator coil capillary tube.

10 Install strainers upstream from and adjacent to solenoid valves, thermostatic expansion valves, and compressors unless they are furnished as an integral assembly for device being protected.

11 Install piping as short and direct as possible, with a minimum number of joints, elbows, and fittings.

17.2 PIPING SCHEDULE FOR REFRIGERANTS

1 Suction Lines: Copper, Type L, annealed- or drawn-temper tubing and wrought-copper fittings with or soldered joints.

2 Hot-Gas and Liquid Lines: Copper type L, annealed- or drawn-temper tubing and wrought-copper fittings with soldered joints.

END OF SECTION

SECTION 233101 -hvac duct and casing – low pressure option 1

18. GENERAL

1 Provide 10” round duct replacing existing 8” round supply duct serving the lobby area. Provide two supply diffusers as shown in the Appendix J.

2 Provide an occupancy sensor and a control damper on the supply duct for the conference room as shown. Interface occupancy sensor with the damper actuator.

18.2 RELATED DOCUMENTS

1 Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

18.3 SUMMARY

1 This Section includes: Low pressure ductwork and fittings.

18.4 QUALITY ASSURANCE

1 Installer Qualifications: Work performed by qualified, experienced mechanics, in accordance with the manual of Duct and Sheet Metal Construction of the Sheet Metal and Air Conditioning Contractors National Association and these Specifications.

2 Regulatory Requirements:

3 Entire ductwork system, including materials and installation, installed in accordance with NFPA 90A.

4 Ductwork and components shall be listed as U.L. 181, Class I air duct, flame rating not to exceed 25 and smoke rating not to exceed 50.

18.5 SUBMITTALS

Submit the following:

A. Provide catalog data on each product specified hereunder.

B. Schedule of duct construction standards.

C. Provide shop drawings showing construction details, support and seismic restraint of ductwork distribution systems.

19. PRODUCTS

19.1 SUPPORTS, ANCHORAGE AND RESTRAINTS

General:

A. When supports, anchorages, and seismic restraints for equipment, and supports and seismic restraints for ductwork are not shown on the Drawings, the contractor shall be responsible for their design.

B. Seismic restraints and anchorages shall resist seismic forces as specified in the latest edition of the International Building Code for the seismic zone in which the project is constructed.

C. Seismic restraints shall follow the provisions described in Section 23 05 48, Vibration and Seismic Control for HVAC Piping and Equipment.

D. Seismic restraints shall not introduce stresses in the ductwork caused by thermal expansion or contraction.

E. Connections to structural framing shall not introduce twisting, torsion, or lateral bending in the framing members. Provide supplementary steel as required.

2 Suspended Ductwork: Seismic restraints shall be in accordance with the latest edition of the SMACNA “Seismic Restraint Manual - Guidelines for Mechanical Systems” for the seismic hazard level corresponding to the seismic zone in which the project is constructed.

3 Engineered Support Systems: The following support systems shall be designed, detailed, and bear the seal of a professional engineer registered in the State of California:

A. Supports and seismic restraints for suspended ductwork and equipment.

B. Support frames for ductwork and equipment which provide support from below.

C. Equipment and ductwork support frame anchorage to supporting slab or structure.

19.2 SHEETMETAL DUCTWORK

1 Fabricate from galvanized steel, unless noted otherwise.

2 Minimum gauge, duct construction, joint reinforcing, fittings, hangers and supports shall be in accordance with SMACNA “HVAC Duct Construction Standards – Metal and Flexible”, Latest Edition.

3 Duct Classification: Ducts shall be considered low pressure when design velocities are 2000 fpm or less and maximum static pressure is 2 inches W.G. positive or negative.

A. The following ductwork constructed in accordance with minimum reinforcement requirements for static pressure class of 1/2-inch W.G. positive or negative. a. Supply ductwork downstream from terminal units.

1. Supply, return or exhaust ductwork serving fans scheduled to operate at less than 1/2inch W.G.

2. Supply, return, or exhaust branch ductwork which serves one or two inlets/outlets.

4 The following ductwork constructed in accordance with minimum reinforcement requirements for static pressure class of 1-inch W.G. positive or negative.

A. Supply, return, or exhaust ductwork serving fans scheduled to operate at less than 1 inch W.G. On supply fans pressure drops for louvers, coils, clean filters, and sound traps may be deleted from scheduled fan static.

B. Supply, return, or exhaust ductwork serving multiple duct branches where contractor can demonstrate that pressures will not exceed 1 inch W.G. positive or negative.

C. Water heater direct vent combustion air intake ductwork.

5 The following ductwork constructed in accordance with minimum reinforcement requirements for static pressure class of 2 inches W.G., positive or negative.

A. Supply, return, or exhaust ductwork serving fans scheduled to operate at pressures greater than 1 inch W.G. positive or negative.

6 Longitudinal seams on rectangular duct shall be Pittsburgh or Button punch snap lock. Snap lock seams for round duct may be used only on ducts classified for 1/2 inch W.G. Longitudinal seams for round ducts using lap and rivet, spot weld, or fillet weld may be used only on ducts classified for statics 1 inch W.G. or less.

7 Joining and reinforcing systems manufactured by Ductmate, Roloc, or TDC are acceptable. Ductmate 35 is equivalent to SMACNA “J”, and Ductmate 25 is equivalent to SMACNA “F”. F. Use of adjustable round elbows not permitted.

19.3 FLEXIBLE DUCTS

Acceptable Manufacturers:

A. Thermaflex M-KE, Gen Flex IMP-25S.

B. Other Manufacturers: Submit Substitution Request.

2 Description: Flexible air duct with CPE or metal film liner permanently bonded to coated spring steel wire helix with 1-inch thick fiberglass insulation blanket covered with fiberglass reinforced metal film vapor barrier jacket. Duct rated for 6-inch W.G. positive and 1-inch W.G. negative.

19.4 EXPOSED OR VISIBLE DUCTWORK IN FINISHED SPACES

1 Round:

A. Material: Round or flat oval, machine formed, spiral lock-seam galvanized sheet metal ductwork of thicknesses as listed for sheet metal duct. Paintable surface.

B. Fittings: Machine formed, shop fabricated, with welded seams, designed for easiest air flow, similar to United Sheetmetal numbers listed.

1. Mitered Elbow with Turning Vanes: Type EV-90-2.

2. Radius Elbows: Type E090-5. Similar for less than 90 degree elbows.

3. Tees: Type Con-T-1.

4. Reducing Fittings: May be used unless noted otherwise.

2 Rectangular: Same as for sheet metal ductwork but paintable surface. All reinforcing shall be inside. Use special care to prevent imperfections in the metal surface.

19.5 DUCTWORK ACCESSESSORIES

1 Volume Dampers and Control Dampers: Single-blade and multiple opposed-blade dampers, standard leakage rating, and suitable for horizontal or vertical applications; factory fabricated and complete with required hardware and accessories. Dampers shall be rated and labeled according to UL 555.

2 Flexible Connectors: Flame-retarded or noncombustible fabrics, coatings, and adhesives complying with UL 181, Class 1.

20. EXECUTION

20.1 APPLIED LOCATIONS

1 Supply ductwork on downstream side of terminal box. Galvanized sheet metal ductwork, lined where indicated on the Drawings.

2 Supply Ductwork from Spin-In Fittings to Supply Outlet Collar Connection: Flexible duct, maximum 4'-0" length.

3 Return Air Trunk Ductwork from End Run to Unit Connection: Galvanized sheet metal ductwork, lined where indicated on the Drawings.

4 Exhaust Ductwork: Galvanized sheet metal ductwork, lined where indicated on the Drawings.

5 Ductwork between Transfer Grilles: Galvanized sheet metal ductwork, lined where indicated on the Drawings.

6 Exposed or Visible Ductwork in Finished Spaces: Sheet metal as specified for application, lined where indicated on the Drawings or as specified in Section 23 07 00.

7 Acoustical lined plenums on inlet and outlet of rooftop units. Plenum size shall be sufficient for duct connections as shown on plans, minimum plenum size shall be same as unit opening.

20.2 INSTALLATION

Ductwork:

A. Seal traverse joints with an approved mastic during joining procedure or tape after joining to provide airtight duct system.

B. Low pressure ductwork hanger and support systems in accordance with SMACNA “HVAC Duct Construction Standards – Metal and Flexible”. Wire supports are not allowed.

C. Provide supplementary steel for support of ductwork in shafts and between building structural members.

D. Fabricate changes in direction to permit easy air flow, using full 1.5D radius bends or fixed turning vanes in square elbows. Radius elbows less than 1.5D radius shall have splitter vanes.

E. Change in duct size or shape necessitated by interference made using rectangular equivalents of equal velocity.

F. Where pipe, structural member, or other obstruction passes through a duct, provide streamlined sheet metal collar around member and increase duct size to maintain net free area. Fit collar and caulk to make air tight.

Sound Attenuation (Internal Insulation):

A. Duct dimensions shown are net inside attenuating material.

3 Dampers: Install where shown and where necessary to complete final balancing of system. Install regulators as specified in Section 23 33 00 for each specific project condition. Leave all dampers locked wide open in preparation for balancing.

4 Extractors: Install…