A-6.2 Project Specifications.pdf

USDA FOREST SERVICE PROJECT SPECIFICATIONS

SECTION 23 00 00

GENERAL MECHANICAL REQUIREMENTS

PART 1 GENERAL

1.1 SUMMARY:

A. Section Includes:

• Stonyford Engine Office – Removing, furnishing and installing furnace and AC unit, installing wire flex ducting, installing commercial supply diffusers, elevating furnace in existing closet for increased return air, installing two new air inlet grills, installing new DWV exhaust venting with concentric vent outlet, installing new programmable thermostat control.

• Soda Creek Office – Furnishing and installing one (1) 3-zone ductless mini split heating and cooling system using outdoor section inverter unit with two (2) indoor wall terminals and one indoor wall mount terminal. Run electrical circuit from indoor panel to outdoor equipment with electrical disconnect, run indoor wire link between indoor and outdoor equipment, install wireless remote thermostat for each indoor section and run condensate lines and outdoor pad.

B. Completed System Required: In the absence of specific exceptions, the mechanical work shall be complete in every detail. Miscellaneous items of material and labor necessary to complete the work described, indicated, or reasonably implied in the specifications shall be included as part of the Contract as if fully specified. All equipment and systems shall be completely functional, adjusted, fully tested, commissioned, and protected from the elements. All operation & maintenance manuals shall be submitted for the work to be complete.

1.2 DEFINITIONS:

A. “Approved” and “Approval” means approval of the Contracting Officer (CO).

B. “Listed” and “Listing” as defined by the Uniform Mechanical Code (UMC).

C. “Provide” means furnish and install completely.

1.3 CODES AND STANDARDS:

A. Applicable regulatory requirements of the State, County, and City, including Building, Mechanical, Plumbing, & Electrical Codes.

B. Uniform Building Code, 1997 edition with latest California Amendments.

C. Uniform Mechanical Code, 1997 edition with latest California Amendments.

D. Uniform Plumbing Code, 1997 edition with latest California Amendments.

E. National Electric Code, 1999 edition.

F. Building Energy Efficiency Standards, California Code of Regulations, Title 24, Part 6.

1.4 CONTRACTOR AND SUBCONTRACTOR QUALIFICATION

A. The Contractor and Subcontractors for this work shall be regularly involved in the construction and installation of mechanical systems and shall be licensed by the State Contractors License Board.

1.5 VISITING THE SITE:

A. The contractor shall visit the site of the proposed construction and verify or determine existing conditions that might affect the work. No adjustments to the contract price will be made to account for conditions that are apparent at the site.

1.6 EQUIPMENT:

A. Description: Except as otherwise permitted by specific designation, materials shall be new, of standard make and, where applicable, conform to ASTM, ASME, NEPA, or other standards requirements, and shall have a UL listing.

B. Substitutions: Where equipment is specified to be of a certain manufacturer, similar equipment of other manufacturers normally engaged in this type of manufacture, may be substituted, if salient characteristics are equal. Furnish like equipment of the same manufacturer for entire, completed systems, throughout the job. All system components and accessories shall be by the same manufacturer, if available.

C. Delivery, Storage and Protection of Materials: Deliver and store materials in original containers, protected from the elements and accessible for inspection. Store items subject to moisture damage in a dry, heated place. HVAC equipment shall not be used for space conditioning or any other purpose during construction. Protect equipment outlets, conduit, piping, and duct openings at all times that work is not in progress on those items; utilize temporary plastic or sheet metal plugs or caps designed for the purpose.

1.7 SUBMITTALS:

A. General: Make complete submittals within 14 calendar days of the contract award. Unless specified differently in individual sections of these specifications, submit 1 copy. All submittals must be complete; partial submittals will not be considered. Complete submittals must be reviewed and approved before installation of any equipment.

B. Format: Where manufacturer’s catalog sheets are used, indicate the specific items to be supplied, in ink, either by arrow, encircled on the sheet, or the inapplicable portion blocked out. List the manufacturer’s name, section number, and drawing number on the initial sheet of each submittal item. Quality photocopies of original printed materials are acceptable; photocopies of faxed materials are not acceptable.

C. Content: Submit catalog cuts, shop drawings, and other information required below on all equipment and materials specified. The following items must be included as a minimum:

1. Changes to be made resulting from substitution of equipment or materials for those that are specified.

2. Full material descriptions and complete bill of materials.

3. Physical dimensions.

4. Operating weight and seismic calculations.

5. Color and finish.

6. Power requirements

7. Wiring Diagrams showing power connections, disconnects required, and control interface connections.

8. Functional description of the controls.

9. Shop drawings of equipment, equipment layout, connection points, and all required clearances.

10. Mounting, support, and vibration isolation details.

11. Rated capacity and statement of compliance with specified national manufacturing or rating standards.

12. Engineering data listed in the specifications or on the drawings.

13. Strength or pressure ratings.

14. Operating points plotted on all pump and fan curves.

15. Manufacturer’s installation, start-up, and maintenance instructions.

16. Listing and manufacturer’s installation instructions for all fire dampers, fire & smoke dampers, and all fuel venting systems.

1.8 OPERATION AND MAINTENANCE MANUALS:

A. General: A copy of the complete operation and maintenance manual must be delivered to the Contracting Officers Representative at least 14 calendar days before requesting the final inspection. The manual must be approved before the final inspection and closing of the contract.

B. Format: Furnish manuals in neat copies, 8-1/2 by 11 inch size in hard cover, loose-leaf, three-ring binder. Accordion fold drawings to 8-1/2 by 11 inch size. Provide an index and tabs for listing the contents. Arrange the contents in the order of their appearance in the specifications. Quality photocopies of original materials are acceptable; photocopies of faxed materials are not acceptable.

Imprint the front cover of the manuals with the following information:

1. Name of the project.

2. Contract number.

3. Date of construction

4. Name, address, and phone number of the mechanical contractor.

C. Content: Include the following items as a minimum:

1. Sequence of operation.

2. Complete equipment list including make, model, serial number, electrical characteristics with fuse sizes, equipment capacities and operating points.

3. Catalog data and parts lists.

4. Manufacturer’s installation, operating and maintenance instructions for all equipment and fixtures.

1.9 TESTING:

A. General: Provide operational testing of all equipment and systems installed under this Division.

The Contracting Officer has the option of observing all testing operations; notify the Contracting Officer three days in advance of any testing. Perform all tests listed in the equipment and control manufacturer’s installation, start-up, adjustment, and checkout procedures.

B. Documentation: For single pieces of equipment, the test results and date tested may be reported directly in the margin of the manufacturer’s literature which lists the test or adjustment procedure.

For multiple pieces of equipment, a separate test report shall list each of the tests required along with the results for each piece of equipment or system tested. As a minimum, the following items shall be tested and reported:

1. Operating voltage and current draw for all motors and compressors operating at full load.

2. Final refrigerant charge (weight) on all refrigeration systems; include the amount of oil added for long line applications.

3. Suction and condensing pressures and temperatures, ambient temperature, entering evaporator temperatures, suction and liquid line temperatures along with degrees of superheat or subcooling as required by the manufacturer to verify the correct refrigerant charge. Include manufacturer’s charging data for comparison.

4. Air temperature rise (dry bulb) through all heating coils and heating appliances, and air temperature drop (dry bulb & wet bulb) across all cooling coils along with corresponding airflow (CFM) for all stages of output/operation.

5. Water temperature rise or drop across all heating and cooling coils along with corresponding flowrate (GPM) and water pressure drop.

6. Total static pressure across each fan and external static pressure across each air handling unit along with the corresponding airflow (CFM).

7. All hydronic piping system flowrates (GPM) along with all pump suction and discharge pressures. For all closed loops, list working pressure at the low point of the piping system.

8. Final orifice sizes and manifold pressures for all burners derated for altitude as required by the manufacturer.

9. Line pressure at the gas connection to each appliance with all gas fired appliances operating simultaneously.

10. Setpoints, throttling range, and differential as appropriate for all controllers and thermostats.

Include cycling rates and heat anticipator settings for thermostats with adjustable anticipators.

11. Fuse sizes and types for all disconnect switches along with equipment nameplate data.

12. Fill out any manufacturer’s “Start-Up & Performance Checklists” along with the date tested.

C. Retesting: Should any piece of equipment, material or work fail in any of the tests, it shall be immediately removed and replaced by approved materials or repaired as authorized by the Contacting Officer. That portion of the equipment, material or work shall again be fully tested as specified above and directed by the Contracting Officer.

PART 2 PRODUCTS

2.1 MATERIALS:

A. Heating and Cooling Equipment:

1. Stonyford Engine Office: Trane, 96% AFUE, LP gas furnace, Energy Star Rated; Trane, 3

Ton, 17 Seer, Energy Star Rated AC unit including new attic supply ducting using R-6 insulated wire flex ducting for eight (8) ceiling supply outlets using commercial supply diffusers.

2. Soda Creek Office: Mitsubishi 3-zone ductless mini split with heating and cooling, 208/230V 1 phase 60 Hz, 24,000 BTU, 16 SEER, 11.2 EER.

B. Manufacturer's Information: Each major component of equipment shall have a label or nameplate indicating the manufacturer, model or catalog number, and electrical rating.

C. Refinishing: Material whose factory finish has been damaged shall be refinished to match original factory finish.

PART 3 EXECUTION

3.01 DEMOLITION:

A. Remove all existing equipment and duct systems as specified herein. Recover all refrigerant in accordance with California and EPA requirements. Remove all materials from Government property and recycle or dispose of at approved facilities. No open stockpiling of demolished materials is allowed; the project site shall be policed and at the end of each work day.

B. Protect all openings, piping, utilities and other materials scheduled for reuse; damaged materials must be replaced.

3.1 INSTALLATION:

A. Scope of Work: Furnish all labor, material, equipment, and services necessary to construct the complete mechanical systems as indicated.

C. Electrical Work: Shall conform to the requirements of Division 16 specifications and the NEC.

1. Materials: Unless otherwise specified or noted elsewhere, all wiring, including control wiring, shall be in conduit; line and low voltage wiring shall be in separate conduits. All conductors shall be copper; minimum conductor size shall be #12 AWG for line voltage power wiring, #14 AWG for Class 1 control circuits, and #18 AWG for Class 2 and 3 control circuits. Control conductors or cables shall be listed for the location and purpose used; submittals are required for plenum rated cables. Low voltage wiring passing through any enclosure or box containing line voltage wiring shall be separated with an approved partition, or the conductors shall all contain the same insulation class. Fused disconnects using Edison base type fuses shall be equipped with inserts which prevent oversized fuse installation. Fuse type and size shall be:

1. As specified in Division 16.

2. As required or recommended by the manufacturer.

3. No larger than 125% of the largest motor (or compressor) load plus 100% of the remaining motor loads.

2. Methods: All wiring shall be new and continuous between equipment or control device enclosures with no splices. No open splices are allowed. Wiring shall terminate on equipment wiring terminals or approved connectors; terminal connectors must be used with stranded conductors. Only one conductor is allowed on each terminal unless terminal connectors are used. Identify all conductors in wiring compartments and electrical boxes;

color code or number tape to correspond to the as-built wiring and control diagram(s).

Control cables entering a wiring compartment or box shall be labeled to identify the system served and/or remote component connected.

C. Manufacturer's Instructions: Material and equipment shall be installed according to the manufacturer's instructions. When the manufacturer's instructions are in conflict with these specifications, furnish a copy of the manufacturer's instructions to the Contracting Officer prior to installation and defer installation until the Contracting Officer issues written instructions on which method shall be followed.

D. Sleeves and Inserts: The Contractor shall be responsible for locating and installing sleeves, inserts, and supports required during the construction. Sleeves are required for wall, floor, and ceiling penetrations.

E. Penetrations, Openings, and Flashings: Obtain written permission from the Contracting Officer before cutting or piercing structural members. Openings for penetrations shall be oversized to allow for expansion and contraction of the penetrating item. Pack openings around penetrating items and finish the surfaces; use escutcheons in exposed areas. Maintain thermal insulation, noise absorption and vapor transmission ratings of the penetrated element. Openings through fire rated partitions and assemblies shall be fire proofed to comply with the UBC or proprietary product standards covering that assembly and fire protection product. Exterior penetrations shall be mechanically flashed and sealed without relying exclusively on caulking. Sealing shall protect against both moisture penetration and air leakage.

F. Adjustments: The Contractor shall be responsible for adjustments in the piping, ductwork and equipment locations due to structural obstructions or conflicts with work specified elsewhere.

3.2 TESTING

A. Equipment Start-Up: All packaged equipment, OEM process or control systems (including VFD’s) shall be started and adjusted by factory authorized representatives. Written test reports and checklists shall be submitted for approval and subsequently included in the operation and maintenance manual. Reports shall show all setpoints, adjustments, and initial operating parameters. Observations of abnormal operation and recommendations for further action shall be included.

B. When electrical and mechanical installations are complete, the Contractor shall energize electrically connected equipment and demonstrate that all mechanical systems function according to design.

Prior to performing this test, the Contractor shall verify that mechanical and electrical systems are in a condition to be energized without damage to the building and equipment, or injury to personnel.

The Contractor shall perform this test prior to final inspection.

C. Show as-built wiring changes and connections to controls on the manufacturer’s wiring diagrams attached to the equipment cabinets.

3.3 DEMONSTRATION

A. Operational Test: Demonstrate operation of all equipment and systems installed under this Division in all modes of operation. Demonstrate all programming procedures and all control functions. All written operating procedures shall be included in the operation and maintenance manual(s).

PART 4 - MEASUREMENT AND PAYMENT

METHOD OF MEASUREMENT

Measurement will be lump sum.

BASIS OF PAYMENT

Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

23 00 00 General Mechanical Requirements Lump Sum

END OF SECTION