Exhibit_C_A1_Division_23_Specifications.pdf

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 1

SECTION 23 05 00

HVAC BASIC MATERIALS AND METHODS

PART 1 GENERAL

1.01 SECTION INCLUDES

A. This Section specifies basic materials, methods, and workmanship requirements for the work described in Division 23.

1.02 RELATED DOCUMENTS

A. Division 23 Specifications Sections

1.03 DESCRIPTION OF WORK

A. The work to be accomplished under this specification, accompanying Division 23 specification sections, and the accompanying drawings, includes the furnishing of all labor, materials, equipment, and services necessary for the proper completion of all HVAC work under the Division 23 contract.

1.04 DEMOLITION

A. Division 23 Contractor shall be responsible for the demolition of HVAC system components noted in the contract documents. Refer to Part 3 for additional demolition requirements.

1.05 QUALITY ASSURANCE

A. Steel Support Welding: Quality processes and operators according to AWSD1.1 "Structural Welding Code - Steel".

B. Steel Pipe Welding: Quality processes and operators according to ASME Boiler and Pressure Vessel Code: Section IX "Welding and Brazing Qualifications".

1. Comply with provisions in ASME B31 Series "Code for Pressure Piping".

2. Certify that each welder has passed ASW qualification tests for welding processes involved and that certification is current.

C. Electrical Characteristic for HVAC Equipment: Equipment of higher electrical characteristics may be furnished provided such proposed equipment is approved in writing and connecting electrical services, circuit breakers, and conduit sizes are appropriately modified. If minimum energy ratings or efficiencies are specified, equipment shall comply with requirements.

D. If statements contained within Division 23 sections appear to conflict with the Conditions of the Contract, the General Requirements, other Division 23 sections, or the Contract Drawings then the statement requiring the greater quantity, superior quality or condition most favorable to the Owner shall take precedence.

E. Furnish labor, equipment, and materials, tools, and skills necessary for and reasonably incidental to the complete the installation of the mechanical systems as herein described and indicated on the drawings.

F. The drawings and specifications are to be considered as supplementing each other. Work specified but not shown, shown but not specified shall be performed or provided as though mentioned in both the specifications and drawings.

G. Include such minor details not specifically mentioned or shown as may be necessary to complete the system, ready for successful operation, and subject to the terms and conditions of the Contract.

H. Carefully review the project drawings and specifications prior to submitting a bid on the work to be done. Any doubt as to the meaning of any part of the project contract documents or other applicable documents shall be submitted in writing to the Engineer for an interpretation thereof.

I. Secure and pay for all service charges, fees, permits, and licenses required in connection with the work of this division.

J. Give all notices and comply with all laws, codes, ordinances, rules, and regulations bearing on the conduct and nature of the work drawn and specified.

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 2

K. Should specifications, Engineer's instructions, laws, codes, ordinances, or any public authority having jurisdiction require any work to be tested or approved, this Contractor shall give timely notice of its readiness for inspection and a reasonable date fixed for such inspection. Engineer shall be notified of best date and time at least five (5) days prior to test. If any work should be covered up without approval or consent of approving agency or Engineer, it shall be uncovered for examination upon request at this contractor's expense.

1.06 INSPECTION OF SITE

A. Before submitting a proposal on the work outlined in this specification and accompanying drawings, each bidder shall examine the site and confirm the means of making connections to services and shall become familiar with all the existing conditions and limitations.

B. It will be the responsibility of the Contractor to visit the site prior to bid to identify the location of any existing building features, wires, conduits, pipes, ducts, or other items which may affect their installation.

C. Any apparent variance of the plan or specification from the existing conditions at the site shall be called to the attention of the Engineer during the bid period so clarification can be made by addendum.

1.07 FEES, PERMITS, AND INSPECTIONS

A. All required fees and inspections for Division 23 work shall be obtained and/or arranged for by the Division 23 Contractor.

B. All required permit fees, plan review fees, and inspection fees for Division 23 work shall be paid for by the Division 23 Contractor.

C. Regular inspections shall be arranged by the Contractor as required by any and all regulations.

All charges for inspections by regulating agencies of installations or review of plans and specifications shall be paid by the Contractor.

1.08 CODES AND STANDARDS

A. All materials and workmanship shall comply with all applicable codes, specifications, ordinances, laws, regulations, industry standards, and utility company regulations.

B. In case of difference between building codes, specifications, state laws, local ordinances, industry standards, and utility company regulations and the Contract Documents, the most stringent shall govern. The Contractor shall promptly notify the Engineer in writing of any such difference.

C. Non-Compliance: Should the Contractor perform any work that does not comply with the requirements of the applicable building codes, state laws, local ordinances, industry standards and utility company regulations, they shall bear all costs arising in correcting the deficiencies.

1.09 DRAWINGS

A. The drawings are to scale as noted but the Contractor shall refer to Architectural and Structural drawings for exact locations of partitions, walls, beams, shafts, equipment, etc. Dimensional information noted on Architectural and Structural drawings shall take precedence over the Division 23 drawings.

B. Drawings of the plumbing systems are diagrammatic and are intended to indicate approximate location and/or direction, and approximate arrangement of the work, but not necessarily the exact detail or exact arrangement of construction.

C. The Division 23 contractor shall consult all drawings, including: architectural, landscape, structural, mechanical, electrical, etc.; and shall confirm any materials, finishes, locations of ceilings, structural members, pipes, ducts, recessed lighting fixtures, conduits, etc. which may affect their installation. This coordination shall occur prior to installation.

D. If it is found that a more convenient, suitable or workable arrangement would result by altering the arrangement indicated on the drawings, the Engineer may require any or all contractors to

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 3

modify the location or arrangement of their work. Such rearrangement shall be in accordance with directions from the Engineer.

E. Discrepancies discovered either before or after work has started, shall be brought to the attention of the Engineer immediately and the Engineer reserves the right to require minor changes in the work of any Contractor in order to eliminate such discrepancies with no change in contract cost. Such rearrangement shall be in accordance with directions from the Engineer.

F. The Division 23 Contractor shall leave adequate room for the installation of equipment by other Contractors items where space is limited. The Division 23 Contractor shall be cautioned that in certain instances, space may be limited to the extent that there may be only one arrangement of equipment or material which may be feasible.

1.10 SYMBOLS, ABBREVIATIONS AND DEFINITIONS

A. Refer to symbols and abbreviations on drawings. Other symbols are in common usage but if uncertainty exists regarding any plan symbols or abbreviations it shall be brought to the attention of the Engineer.

B. Within the contract documents, the word “Provide” shall be considered to be equivalent to the phrase “Furnish and Install”.

1.11 USE OF FACILITY

A. The normal use of the facility shall not be disturbed, except within the immediate construction area. All walks, driveways and entrances shall be kept clear and free of all Contractor's equipment, material and debris at all times.

1.12 CLEANUP

A. Each trade shall periodically clear away all debris, surplus materials, etc. resulting from their work or operations, leaving the job and the equipment furnished under any or all contracts in a clean condition.

PART 2 PRODUCTS

2.01 PIPE SLEEVES

A. Sleeves shall be uncoated or galvanized steel pipe not less than Schedule 40.

B. Sleeves in rated walls shall be as required for U. L. listing.

C. Temporary sleeves in poured concrete walls or floors shall be poly-sleeve with nailing flange.

2.02 IDENTIFICATION OF PIPING AND VALVES

A. Comply with Section 230553.

PART 3 EXECUTION

3.01 CUTTING AND PATCHING AND INFILL

A. Each contractor shall perform all cutting necessary in order to perform their work unless such work has been delegated to the General Contractor. However, special permission shall be obtained from the Engineer before cutting structural members or finished material.

B. All patching and infill shall be performed in such manner as to leave no visible trace and to return the part affected to the condition of undisturbed work. Patching and infill work shall be performed by the General Contractor with persons experienced, skilled and licensed for the particular type of work involved. Inferior work will not be accepted.

C. Pipe penetrations through new or existing floors and walls, regardless of type of construction, shall be done by rotary drill, wet or dry method. Use of hand, electric, or pneumatic impact tool is not acceptable. Each contractor shall contain water and dust to avoid damage to adjacent finishes, furniture and equipment.

D. Each contractor may need to provide additional selective demolition not shown on the drawings as required for installation of new building elements and systems.

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 4

E. Pavements, sidewalks, roads and curbs shall be cut, patched, repaired and replaced as required to permit the installation of the work of each trade. Such cutting, patching, repairing and replacing shall be the responsibility of, and paid for by, the trade requiring the work.

F. Each contractor shall bear the expense of all cutting, patching, infilling, repairing, or replacing of the work of other trades required because of their fault, error, tardiness, or damage done.

3.02 HOLES THROUGH MASONRY AND CONCRETE

A. Each trade shall provide all holes and openings required for their work unless such holes and openings are shown to be provided on the architectural or structural drawings. Pay particular attention to openings required in pre-cast, pre-stressed, or post-tensioned slabs.

B. Each trade shall be responsible for providing and disposing of water they use in the core drilling operation. Such work shall be scheduled and other trades coordinated so that damage will not result from the use of water.

3.03 PIPE SLEEVES

A. Provide sleeves for all piping as follows:

1. Exposed finished areas

2. Fire rated or acoustical walls

3. Fire rated floors

4. CMU walls

5. Sleeves shall be a minimum of 1” greater in inside diameter than piping passing through sleeve.

6. Fabricate all pipe sleeves of new material, cut square and reamed.

7. All sleeves through walls, extend full thickness of wall, cut flush with finished surfaces.

8. Pack space between all sleeve and pipes.

9. For sleeves located in fire rated construction, comply with Division 7 - Firestopping.

10. All pipe penetrations through fire rated construction shall be made with U.L. listed fire penetration assemblies. Refer to Architectural drawings locations of for fire rated construction. In addition, and at a minimum for determining pipe sleeve and sealing requirements, pipe penetrations at the following locations shall be considered to be fire rated construction unless directed otherwise by the Architect of Record:

a. All floors.

b. Walls adjoining corridors, enclosed stairs, mechanical rooms, electrical rooms, and storage rooms

11. Permanent sleeves through floor slabs for exposed piping shall extend 1/2" above finished floor. Sleeves shall extend 4” above the floor in mechanical penthouses, dishwashing areas, kitchens, server areas, and all other wet areas. Where concealed, set sleeves through floor and flush with floor. Concealed piping is piping in walls, chases and similar locations. All sleeves through existing floor slabs shall be bonded to the slab with an epoxy bonding material.

12. In locating and setting sleeves, this Contractor is to leave a minimum of 4" between sleeves in rows or clusters. Where the normal spacing of top and bottom reinforcing bars cannot be maintained or the bars are interrupted because of sleeves size or cluster location, provide extra reinforcing bar as specified elsewhere around the clusters or sleeves as approved by Architect or Engineer.

3.04 DEMOLITION

A. General: Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction.

Use hand tools or small power tools designed for sawing or grinding, not hammering or chopping. Temporarily cover openings that are to remain.

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 5

2. Cut or drill from the exposed or finished side into concealed surfaces to avoid marring existing finished surfaces.

3. Locate selective demolition equipment and remove debris and materials so as not to impose excessive loads on supporting walls, floors, or framing.

4. Dispose of demolished items and materials promptly.

B. Removed and Reinstalled Items:

1. Clean and repair items to functional condition adequate for intended reuse.

2. Pack or crate items after cleaning and repairing. Identify contents of containers.

3. Protect items form damage during transport and storage.

4. Reinstall items in locations as indicated. Comply with the installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make items functional for use intended.

C. Existing Items to Remain: Protect construction indicated to remain against damage and soiling during selective demolition. When permitted by the Project Manager, items may be removed to a suitable protected storage location during selective demolition and reinstalled in their original locations after selective demolition operations are complete.

D. Disconnect, demolish, and remove mechanical systems, equipment, and components indicated to be removed. Remove any mechanical piping and ductwork systems, equipment, and components that are abandoned, inactive, or unused. If there are any questions pertaining to existing piping or ductwork proceed as directed by the Owner.

1. Piping to removed: Remove portion of piping indicated to be removed and cap remaining piping with same or compatible piping material. Piping to be removed includes piping, fittings, valves, components, insulation, hangers, and attachments to structure.

2. Piping to be abandoned in place: Drain piping and cap piping with same or compatible material. This applies to abandoned piping concealed behind inaccessible finished spaces, unless otherwise indicated.

3. Equipment to be removed: Disconnect and cap services and remove equipment.

Equipment to be removed includes equipment, accessories, attached piping and ductwork including hangers and supports back to structure.

4. Equipment to be removed and reinstalled: Disconnect and cap services and remove, clean, and store equipment; when appropriate, reinstall, reconnect, and make equipment operational.

E. If pipe, insulation, or equipment to remain is damaged in appearance or is unserviceable, remove damaged, or unserviceable portions and replace with new products of equal capacity and quality.

F. The demolition work shall be a phased operation and shall comply with the construction sequence schedule.

G. The Division 23 Contractor shall include all temporary connections necessary to permit the Owner to occupy areas of the building during the various construction phases.

H. The Division 23 Contractor shall be responsible for coordinating the installation to prevent disruption to the Owner and minimize the "downtime." The Architect/Owner's approval shall be sought prior to all cut-off of services.

I. The Division 23 Contractor shall remove existing work shown, specified or necessary for completion of their work. Owner shall have the option of retaining any or all items of material removed under this contract. Items or materials not retained by Owner shall become the property of the Contractor and shall be removed from the premises.

J. The Division 23 Contractor shall verify the extent of the remodeling work and any details not clear shall be referred to the Architect/Engineer for clarification prior to commencing demolition work.

K. Use of Owner's dumpsters for the disposition of any type of construction debris is not allowed.

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 6

3.05 CLEANING

A. Remove demolition waste materials from Project site and dispose of them in an approved manner.

1. Do not allow demolished materials to accumulate on site.

2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

3. Remove debris from elevated portions of building by chute, hoist, or other device that will convey debris to grade level in a controlled descent.

3.06 PAINTING

A. Painting shall comply with the requirements of Division 9.

3.07 FIRE SAFETY PRECAUTIONS

A. The Contractors shall exercise extreme care to maintain and exercise adequate fire safety precautions throughout the work. This shall include providing sufficient firefighting devices, watchmen, standby helpers or other precautions during construction, in use of temporary heat, welding, brazing, sweating, testing or other phase of work.

B. At all times, access shall be maintained for fire department trucks to the building.

C. All welding, brazing, cutting and sweating operations performed in the vicinity of or accessible to combustible materials, shall be adequately protected to make certain that sparks or hot slag does not reach the combustible material and start a fire.

D. All glass, glazed materials and other finish, in the vicinity of welding, brazing and cutting, shall be masked by the Contractor performing the welding work.

E. When necessary to do cutting, welding, brazing, sweating and similar work in the vicinity of wood, in shafts or in the vicinity of any combustible material (and the combustible material cannot be removed), the materials shall be adequately protected with fire retardant blankets or similar approved coverings.

3.08 CONNECTIONS TO MISCELLANEOUS EQUIPMENT

A. Due to the fact that the manufacturer of the equipment purchased may vary slightly from that specified and therefore requires some rearranging or equipment different from that indicated on the Drawings, the Contractor shall confirm manufacturer’s installation requirements and make connections to such rearranged equipment without additional cost to the Owner. This requirement shall be for an initial installation arrangement other than that indicated on the Drawings.

B. Contractor shall make all HVAC connections to all equipment in this building whether or not such equipment is furnished by this Contractor, other Contractors, or by the Owner. This includes providing piping, valves, unions, fittings, ductwork, air control devices and insulation as indicated herein and/or on the drawings.

3.09 INSTRUCTION OF OPERATING PERSONNEL

A. Each trade shall furnish, without additional expense to the Owner, the services of competent instructors, who will give full instruction in the care, adjustment, and operation and maintenance of all parts of the equipment to the Owner's permanent employees who are to have charge of the equipment.

B. Each instructor shall be thoroughly familiar with all parts of the installation on which they are to give instructions and shall be trained in operating theory as well as in practical operation and maintenance work. Factory trained instructors shall be employed wherever they are available.

Instruction shall be given during regular workweek and at a time just prior to the time the equipment is accepted and turned over to the Owner for regular operation.

3.10 START-UP

A. Startup of equipment and training shall occur on separate occasions. Equipment shall be operating and controls shall be functioning properly and fully prior to training.

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC BASIC MATERIALS AND METHODS 23 05 00 - 7

B. All start-ups shall be documented, including all VFD parameters so that the owner has record of parameter settings on hand in case of emergency replacement.

END OF SECTION 23 05 00

Event Austin MN National Guard Armory Boiler Plant Replacement

Meters and Gauges for HVAC Piping 23 05 19 - 1

SECTION 23 05 19

METERS AND GAUGES FOR HVAC PIPING

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Pressure gauges and pressure gauge taps.

B. Thermometers and thermometer wells.

1.02 RELATED REQUIREMENTS

A. Section 23 21 13 - Hydronic Piping.

1.03 REFERENCE STANDARDS

A. ASME B40.100 - Pressure Gauges and Gauge Attachments; 2022.

B. UL 393 - Indicating Pressure Gauges for Fire-Protection Service; Current Edition, Including All

Revisions.

1.04 SUBMITTALS

A. Product Data: Provide list that indicates use, operating range, total range and location for manufactured components.

B. Project Record Documents: Record actual locations of components and instrumentation.

1.05 FIELD CONDITIONS

A. Do not install instrumentation when areas are under construction, except for required rough-in, taps, supports and test plugs.

PART 2 PRODUCTS

2.01 PRESSURE GAUGES

A. Manufacturers:

1. Dwyer Instruments, Inc

2. Moeller Instrument Co., Inc

3. Omega Engineering, Inc

4. Weiss; Model 4CT

5. Or an approved equal.

B. Pressure Gages: ASME B40.100, UL 393 drawn stainless steel case, phosphor bronze bourdon tube, rotary brass movement, brass socket, with front recalibration adjustment, black scale on white background.

1. Case: Stainless steel with lexan window, phosphur bronze tube and brass socket.

2. Size: 3-1/2 inch diameter.

3. Mid-Scale Accuracy: One percent.

4. Scale: Psi.

2.02 LIQUID FILLED PRESSURE GAGES

A. Manufacturers:

1. Dwyer Instruments, Inc

2. Moeller Instrument Co., Inc

3. Omega Engineering, Inc

4. Weiss; Model LF441

5. Or an approved equal.

B. Pressure Gages: ASME B40.100, UL 393 drawn stainless steel liquid filled case, phosphor bronze bourdon tube, rotary brass movement, brass socket, with front recalibration adjustment, black scale on white background.

1. Case: Stainless steel with lexan window, phosphur bronze tube and brass socket.

2. Size: 4 inch diameter.

3. Mid-Scale Accuracy: One percent.

Event Austin MN National Guard Armory Boiler Plant Replacement

Meters and Gauges for HVAC Piping 23 05 19 - 2

4. Scale: Psi.

2.03 PRESSURE GAUGE TAPPINGS

A. Gauge Cock: Tee or lever handle, brass for maximum 150 psi.

2.04 DIGITAL STEM TYPE THERMOMETERS

A. Manufacturers:

1. Dwyer Instruments, Inc

2. Omega Engineering, Inc

3. Weksler Glass Thermometer Corp

4. Weiss; Model DVU

5. Trerice

6. Or an approved equal.

B. Thermometer shall be fully adjustable angle type, Hi-impact ABS housing, with LCD display digits that are 1/2" tall, switchable between Fahrenheit and Celsius, push button minimum and maximum readings with reset.

C. Thermometer shall require no batteries or external power source and operate at a minimum of 10 lux and have a resolution of 1/10° with full 4-digit display and update at an interval of 10 seconds.

D. Temperature range shall be -50° F to 300° F.

E. Thermometer shall include a brass separable thermowell.

PART 3 EXECUTION

3.01 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Provide one pressure gauge per pump, installing taps before strainers and on suction and discharge of pump. Pipe to gauge.

C. Install thermometers in piping systems in sockets in short couplings. Enlarge pipes smaller than 2-1/2 inch for installation of thermometer sockets. Ensure sockets allow clearance from insulation.

D. Install thermometers in matter so they can be easily read and do not hinder equipment maintenence. Maintain proper service clearances.

E. Provide instruments with scale ranges selected according to service with largest appropriate scale.

F. Install gauges and thermometers in locations where they are easily read from normal operating level. Install vertical to 45 degrees off vertical.

G. Adjust gauges and thermometers to final angle, clean windows and lenses, and calibrate to zero.

3.02 SCHEDULE

A. Pressure Gauges, Location and Scale Range:

B. Liquid Filled Pressure Gages, Location and Scale Range:

1. Pumps, 0 to 100 psi.

C. Stem Type Thermometers, Location and Scale Range:

1. Heating supply and return, 0 to 200 degrees F.

END OF SECTION 23 05 19

Event Austin MN National Guard Armory Boiler Plant Replacement

Identification for HVAC Piping and Equipment 23 05 53 - 1

SECTION 23 05 53

IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Nameplates.

B. Pipe markers.

PART 2 PRODUCTS

2.01 IDENTIFICATION APPLICATIONS

A. Piping: Pipe markers.

B. Pumps: Nameplates.

C. Boilers: Nameplates.

2.02 NAMEPLATES

A. Manufacturers:

1. Advanced Graphic Engraving

2. Brimar Industries, Inc.

3. Kolbi Pipe Marker Co.

4. Seton Identification Products

5. Or an approved equal.

B. Description: Laminated three-layer plastic with engraved letters.

1. Letter Color: White

2. Background Color: Black

3. Plastic: Conform to ASTM D709.

C. Vinyl adhesive identification stickers may be used contingent upon an accepted sample that has been submitted to the project engineer.

1. Refer to schedule below for letter size and color.

2.03 PIPE MARKERS

A. Manufacturers:

1. Brady Corporation

2. Brimar Industries, Inc.

3. Kolbi Pipe Marker Co.

4. Seton Identification Products

5. Or an approved equal.

B. Comply with ASME A13.1.

C. Description: The Contractor shall provide pre-coiled, semi-rigid, pre-printed vinyl adhesive pipe markers for each piping system for all new piping that is provided under this contract. Pipe markers shall indicate line contents, and direction of flow.

D. Plastic Tape Pipe Markers: Flexible, vinyl film tape with pressure sensitive adhesive backing and printed markings. All markers shall have a service temperature of 40°F to 175°F and be rated for outdoor service. Material shall be compatible with carbon steel pipe, stainless steel pipe, plastic pipe, all service jackets, canvas jacketing, and aluminum jacketing.

E. Arrangement: For external diameters (including insulation) equal to or greater than 1-1/2", rectangular pipe contents indication marker shall contain only one line of text and appear on both sides of the pipe with a flow direction arrow roll wrapping 360 degrees around at both ends of the pipe contents indication marker. For external diameters less than 1-1/2", provide full-band marker extending 360 degrees around pipe. The wording of each marker shall be spelled out in the direction of the travel of the pipe.

F. Color code as follows:

Event Austin MN National Guard Armory Boiler Plant Replacement

Identification for HVAC Piping and Equipment 23 05 53 - 2

1. Heating and Cooling: Green with white letters.

G. Size:

Overall O.D. Including Insulation Minimum Letter Size 3/4" to 1-1/4" 1/2" 1-1/2" to 2" 3/4" 2-1/2" to 6" 1-1/4"

8" to 10" 2-1/2" Over 10" 3-1/2"

PART 3 EXECUTION

3.01 PREPARATION

A. Degrease and clean surfaces to receive adhesive for identification materials.

3.02 INSTALLATION

A. Install nameplates with corrosive-resistant mechanical fasteners, or adhesive. Apply with sufficient adhesive to ensure permanent adhesion and seal with clear lacquer.

B. Install plastic tape pipe markers complete around pipe in accordance with manufacturer's instructions.

C. Identify piping, concealed or exposed, with plastic tape pipe markers. Use tags on piping ¾ inch diameter and smaller. Identify service and flow direction. Install in clear view and align with axis of piping. Locate identification not to exceed 20 feet on straight runs including risers and drops, adjacent to each valve and Tee, at each side of penetration of structure or enclosure, and at each obstruction. Each pipe shall be stenciled within 2 feet of the pipes wall penetration on both sides.

3.03 SCHEDULE

A. Equipment Type: Piping

1. Identification:

Media Pipe Marker Letter Color Heating Water Supply Heating Hot Water Supply White on Green Heating Water Return Heating Hot Water Return White on Green Natural Gas Natural Gas Black on Yellow

B. Equipment Type: HVAC Equipment, Controls, and Instrumentation

1. Identification:

Equipment Letter Height Letter Color Boilers 1" Black Pumps 1/2" Black

END OF SECTION 23 05 53

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC Piping Insulation 23 07 19 - 1

SECTION 23 07 19

HVAC PIPING INSULATION

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Piping insulation.

B. Jacketing and accessories.

1.02 RELATED REQUIREMENTS

A. Section 07 84 00 - Firestopping.

B. Section 23 21 13 - Hydronic Piping: Placement of hangers and hanger inserts.

C. Section 23 23 00 - Refrigerant Piping: Placement of inserts.

1.03 REFERENCE STANDARDS

A. ASTM C177 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal

Transmission Properties by Means of the Guarded-Hot-Plate Apparatus; 2019, with Editorial Revision (2023).

B. ASTM C195 - Standard Specification for Mineral Fiber Thermal Insulating Cement; 2007 (Reapproved 2019).

C. ASTM C547 - Standard Specification for Mineral Fiber Pipe Insulation; 2022a.

D. ASTM C795 - Standard Specification for Thermal Insulation for Use in Contact with Austenitic

Stainless Steel; 2008 (Reapproved 2018).

E. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials;

2023.

F. ASTM E96/E96M - Standard Test Methods for Gravimetric Determination of Water Vapor

Transmission Rate of Materials; 2022a, with Editorial Revision (2023).

G. UL 723 - Standard for Test for Surface Burning Characteristics of Building Materials; Current

Edition, Including All Revisions.

1.04 SUBMITTALS

A. Product Data: Provide product description, thermal characteristics, list of materials and thickness for each service, and locations.

B. Manufacturer's Instructions: Indicate installation procedures that ensure acceptable workmanship and installation standards will be achieved.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Accept materials on site, labeled with manufacturer's identification, product density, and thickness.

1.06 FIELD CONDITIONS

A. Maintain ambient conditions required by manufacturers of each product.

B. Maintain temperature before, during, and after installation for minimum of 24 hours.

PART 2 PRODUCTS

2.01 REGULATORY REQUIREMENTS

A. Surface Burning Characteristics: Flame spread index/Smoke developed index of 25/50, maximum, when tested in accordance with ASTM E84 or UL 723.

2.02 GLASS FIBER, RIGID

A. Manufacturers:

1. CertainTeed Corporation

2. Johns Manville Corporation

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC Piping Insulation 23 07 19 - 2

3. Knauf Insulation

4. Owens Corning Corporation; Fiberglas Pipe Insulation ASJ

5. Or an approved equal.

B. Insulation: ASTM C547 and ASTM C795; semi-rigid, noncombustible, end grain adhered to jacket.

1. 'K' Value: ASTM C177, 0.23 at 75 degrees F.

2. Maximum Service Temperature: 650 degrees F.

3. Maximum Moisture Absorption: 0.2 percent by volume.

C. Vapor Barrier Jacket: White kraft paper with glass fiber yarn, bonded to aluminized film;

moisture vapor transmission when tested in accordance with ASTM E96/E96M of 0.02 perm-inches.

1. Adhere factory supplied jacket flap smooth and secure at longitudinal laps with a white vapor barrier adhesive. Use 3 inch self-sealing tape over butt joints.

D. Vapor Barrier Lap Adhesive: Compatible with insulation.

E. Insulating Cement/Mastic: ASTM C195; hydraulic setting on mineral wool.

2.03 JACKETING AND ACCESSORIES

A. PVC Plastic.

1. Jacket: One piece molded type fitting covers and sheet material, off-white color.

a. Minimum Service Temperature: 0 degrees F.

b. Maximum Service Temperature: 150 degrees F.

c. Moisture Vapor Permeability: 0.002 perm inch, maximum, when tested in accordance with ASTM E96/E96M.

d. Thickness: 30 mil.

e. Connections: Brush on welding adhesive.

2. Covering Adhesive Mastic: Compatible with insulation.

PART 3 EXECUTION

3.01 EXAMINATION

A. Test piping for design pressure, liquid tightness, and continuity prior to applying insulation materials.

B. Verify that surfaces are clean and dry, with foreign material removed.

3.02 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Install in accordance with NAIMA National Insulation Standards.

C. Exposed Piping: Locate insulation and cover seams in least visible locations.

D. Insulate entire system including fittings, valves, unions, flanges, strainers, air/hydraulic separators, flexible connections, and expansion joints.

E. Glass Fiber Insulated Pipes Conveying Fluids Below Ambient Temperature:

1. Provide vapor barrier jackets, factory-applied or field-applied; secure with self-sealing longitudinal laps and butt strips with pressure-sensitive adhesive. Secure with outward clinch expanding staples and vapor barrier mastic.

F. For hot piping conveying fluids 140 degrees F or less, do not insulate flanges and unions at equipment, but bevel and seal ends of insulation.

G. For hot piping conveying fluids over 140 degrees F, insulate flanges and unions at equipment.

H. Glass Fiber Insulated Pipes Conveying Fluids Above Ambient Temperature:

1. Provide standard jackets, with or without vapor barrier, factory-applied, or field-applied.

Secure with self-sealing longitudinal laps and butt strips with pressure-sensitive adhesive.

Secure with outward clinch expanding staples.

Event Austin MN National Guard Armory Boiler Plant Replacement

HVAC Piping Insulation 23 07 19 - 3

I. Inserts and Shields:

1. Application: Piping 1-1/2 inches diameter or larger.

2. Shields: Galvanized steel between pipe hangers or pipe hanger rolls and inserts.

3. Insert location: Between support shield and piping and under the finish jacket.

4. Insert Configuration: Minimum 6 inches long, of same thickness and contour as adjoining insulation; may be factory fabricated.

5. Insert Material: Hydrous calcium silicate insulation or other heavy density insulating material suitable for the planned temperature range.

J. Continue insulation through walls, sleeves, pipe hangers, and other pipe penetrations. Finish at supports, protrusions, and interruptions. At fire separations, see Section 07 84 00.

3.03 SCHEDULE

A. Heating Systems:

1. Heating Water Supply and Return:

a. Glass Fiber Insulation

1) All pipe sizes.

2) Thickness: 1-1/2 inches.

END OF SECTION 23 07 19

Event Austin MN National Guard Armory Boiler Plant Replacement

SEQUENCE OF OPERATIONS FOR HVAC

CONTROLS 23 09 93 - 1

SECTION 23 09 93

SEQUENCE OF OPERATIONS FOR HVAC CONTROLS

PART 1 GENERAL

1.01 RELATED DOCUMENTS

A. Procurement and Contracting Requirements, DIVISION 00 and General Requirements, DIVISION 01 govern work under this Section.

1.02 SECTION INCLUDES

A. This section defines the manner and method by which controls function. Requirements for each type of control system operation are specified. Equipment, devices, and system components required for control systems are specified in other sections.

B. Sequence of operation for:

1. Boiler plant heating system.

1.03 RELATED REQUIREMENTS

A. Section 23 09 13 - Instrumentation and Control Devices for HVAC.

B. Section 23 09 23 – Direct Digital Control System for HVAC.

1.04 SUBMITTALS

A. Sequence of Operation Documentation: Submit written sequence of operation for entire HVAC system and each piece of equipment.

1. State each sequence in small segments and give each segment a unique number for referencing in Functional Test procedures; provide a complete description regardless of the completeness and clarity of the sequences specified in Contract Documents.

2. Include at least the following sequences:

a. Start-up.

b. Warm-up mode.

c. Normal operating mode.

d. Unoccupied mode.

e. Shutdown.

f. Capacity control sequences and equipment staging.

g. Temperature and pressure control, such as setbacks, setups, resets, etc.

h. Detailed sequences for all control strategies, such as economizer control, optimum start/stop, staging, optimization, demand limiting, etc.

i. Sequences for all alarms and emergency shut downs.

j. Interactions and interlocks with other systems.

3. Include initial and recommended values for all adjustable settings, setpoints and parameters that are typically set or adjusted by operating staff; and any other control settings or fixed values, delays, etc. that will be useful during testing and operating the equipment.

4. For packaged controlled equipment, include manufacturer's furnished sequence of operation amplified as required to describe the relationship between the packaged controls and the control system, indicating which points are adjustable control points and which points are only monitored.

B. Control System Diagrams: Submit graphic schematic of the control system showing each control component and each component controlled, monitored, or enabled.

1. Label with settings, adjustable range of control and limits.

2. Include flow diagrams for each control system, graphically depicting control logic.

3. Include the system and component layout of all equipment that the control system monitors, enables or controls, even if the equipment is primarily controlled by packaged or integral controls.

4. Include all monitoring, control and virtual points specified in elsewhere.

5. Include a key to all abbreviations.

Event Austin MN National Guard Armory Boiler Plant Replacement

SEQUENCE OF OPERATIONS FOR HVAC

CONTROLS 23 09 93 - 2

C. Points List: Submit list of all control points indicating at least the following for each point.

1. Name of controlled system.

2. Point abbreviation.

3. Point description; such as dry bulb temperature, airflow, etc.

4. Display unit.

5. Control point or setpoint; i.e. a point that controls equipment and can have its setpoint changed.

6. Monitoring point; i.e. a point that does not control or contribute to the control of equipment but is used for operation, maintenance, or performance verification.

7. Intermediate point; i.e. a point whose value is used to make a calculation which then controls equipment, such as space temperatures that are averaged to a virtual point to control reset.

8. Calculated point; i.e. a “virtual” point generated from calculations of other point values.

D. Project Record Documents: Record actual locations of components and setpoints of controls, including changes to sequences made after submission of shop drawings.

PART 2 PRODUCTS - NOT USED

PART 3 EXECUTION

3.01 DEFINITIONS

A. Table Definitions.

1. Hardware Points:

a. DI - Digital Input.

b. DO - Digital Output.

c. AI - Analog Input.

d. AO - Analog Output.

e. MI - Multi-state Input.

f. MO - Multi-state Output.

2. Software Points:

a. DV - Digital Variable.

b. AV - Analog Variable.

c. T - Trendable Point.

d. S - Scheduled.

e. A - Alarm Point.

f. G - Show Point on Graphic

3.02 SEQUENCE OF OPERATIONS

A. See plans for sequence of operations and required points lists.

END OF SECTION 23 09 93

Event Austin MN National Guard Armory Boiler Plant Replacement

Facility Natural-Gas Piping 23 11 23 - 1

SECTION 23 11 23

FACILITY NATURAL-GAS PIPING

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Pipe, pipe fittings, valves, and connections for natural gas piping systems.

1.02 RELATED REQUIREMENTS

A. Section 23 05 53 - Identification for HVAC Piping and Equipment.

1.03 REFERENCE STANDARDS

A. ANSI Z21.18/CSA 6.3 - Gas Appliance Pressure Regulators; 2019.

B. ANSI Z21.80/CSA 6.22 - Line Pressure Regulators; 2019.

C. ASME B16.3 - Malleable Iron Threaded Fittings: Classes 150 and 300; 2021.

D. ASME B31.1 - Power Piping; 2024.

E. ASME B31.9 - Building Services Piping; 2020.

F. ASTM A53/A53M - Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless; 2022.

G. ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products; 2017.

H. ASTM A234/A234M - Standard Specification for Piping Fittings of Wrought Carbon Steel and

Alloy Steel for Moderate and High Temperature Service; 2023.

I. MSS SP-110 - Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends;

2010, with Errata .

J. NFPA 58 - Liquefied Petroleum Gas Code; 2020, with Amendment.

1.04 SUBMITTALS

A. See Section 01 30 00 - Administrative Requirements, for submittal procedures.

B. Product Data: Provide data on pipe materials, pipe fittings, valves, and accessories. Provide manufacturers catalog information. Indicate valve data and ratings.

C. Shop Drawings: For non-penetrating rooftop supports, submit detailed layout developed for this project, with design calculations for loadings and spacings.

D. Project Record Documents: Record actual locations of valves.

1.05 QUALITY ASSURANCE

A. Perform work in accordance with applicable codes.

B. Valves: Manufacturer's name and pressure rating marked on valve body.

C. Identify pipe with marking including size, ASTM material classification, and ASTM specification.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Accept valves on site in shipping containers with labeling in place. Inspect for damage.

B. Provide temporary protective coating on cast iron and steel valves.

C. Provide temporary end caps and closures on piping and fittings. Maintain in place until installation.

D. Protect piping systems from entry of foreign materials by temporary covers, completing sections of the work, and isolating parts of completed system.

1.07 FIELD CONDITIONS

A. Do not install underground piping when bedding is wet or frozen.

Event Austin MN National Guard Armory Boiler Plant Replacement

Facility Natural-Gas Piping 23 11 23 - 2

PART 2 PRODUCTS

2.01 NATURAL GAS PIPING, ABOVE GRADE

A. Steel Pipe (Interior): ASTM A53/A53M Schedule 40 black.

1. Fittings: ASME B16.3, malleable iron, or ASTM A234/A234M, wrought steel welding type.

2. Joints: NFPA 58, threaded or welded to ASME B31.1.

B. Steel Pipe (Exterior): ASTM A53/A53M Schedule 40 galvanized.

1. Fittings: ASME B16.3, galvanized malleable iron.

2. Joints: NFPA 54, threaded or welded to ASME B31.1.

3. Finish threaded and welded fitting connections with a cold galvanizing compound.

C. Flexible Connectors: Indoor flexible connectors shall comply with ANSI Z21.69.

1. Type 300 corrugated stainless steel tubing with polymer coating.

2. Operating pressure rating: 5.0 psig.

3. Fittings: Zinc coated steel.

4. Maximum length: 24 inches.

2.02 FLANGES, UNIONS, AND COUPLINGS

A. Unions for Pipe Sizes 3 Inches and Under:

1. Ferrous Pipe: Class 150 malleable iron threaded unions.

2.03 PIPE HANGERS AND SUPPORTS

A. Provide hangers and supports that comply with MSS SP-58.

1. If type of hanger or support for a particular situation is not indicated, select appropriate type using MSS SP-58 recommendations.

2. Overhead Supports: Individual steel rod hangers attached to structure or to trapeze hangers.

3. Trapeze Hangers: Welded steel channel frames attached to structure.

4. Vertical Pipe Support: Steel riser clamp.

5. Rooftop Supports for Low-Slope Roofs: Steel pedestals with bases that rest on top of roofing membrane, not requiring any attachment to the roof structure and not penetrating the roofing assembly, with support fixtures as specified; and as follows:

a. Bases: High density polypropylene.

b. Base Sizes: As required to distribute load sufficiently to prevent indentation of roofing assembly.

c. Steel Components: Stainless steel, or carbon steel hot-dip galvanized after fabrication in accordance with ASTM A123/A123M.

d. Attachment/Support Fixtures: As recommended by manufacturer, same type as indicated for equivalent indoor hangers and supports; corrosion resistant material.

e. Height: Provide minimum clearance of 6 inches under pipe to top of roofing.

2.04 BALL VALVES

A. Manufacturers:

1. Conbraco Industries Inc.

2. Apollo Valves

3. Grinnell Products

4. Milwaukee Valve Company

5. Nibco, Inc

6. Or an approved equal.

B. Construction, 4 Inches and Smaller: MSS SP-110, Class 150, 600 psi CWP, bronze body, 304 stainless steel ball, regular port, Teflon seats and stuffing box ring, blow-out proof stem, lever handle, threaded ends.

2.05 LINE PRESSURE REGULATORS AND APPLIANCE REGULATORS

A. Manufacturers:

Event Austin MN National Guard Armory Boiler Plant Replacement

Facility Natural-Gas Piping 23 11 23 - 3

1. Maxitrol.

2. Fisher.

3. Sensus.

4. Itron.

5. Or an approved equal.

B. Compliance Requirements:

1. Appliance Regulator: ANSI Z21.18/CSA 6.3.

2. Line Pressure Regulator: ANSI Z21.80/CSA 6.22.

C. Materials in Contact With Gas:

1. Housing: Aluminum, steel (free of non-ferrous metals).

2. Seals and Diaphragms: NBR-based rubber.

D. Maximum Inlet Operating Pressure:

1. Appliance Regulator: 2 psi.

2. Line Pressure Regulator: 10 psi.

E. Appliance regulators shall control gas pressures from 2 pounds down to inches as required for each appliance. The self-aligning valve is made of nitrile rubber with lever action for dead end lockup. Housings are durable aluminum die castings and all internal parts are carefully selected and corrosion resistant. The diaphragms are of high quality supported synthetic rubber components. The regulators are suitable for multi-poise mounting, and properly vented for the location in which it is installed.

F. Venting

1. Interior mounted regulators shall use ANSI Z21.80 / CSA 6.22 compliant vent limiters which are designed for use indoors and spaces where limiting the amount of gas escapement due to diaphragm failure is critical. Vent limiters shall not be used outdoors where they are exposed to the environment.

2. Exterior mounted regulators shall vent to the outdoors and be protected in a means to prevent water and foreign material from entering through the vent.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify that excavations are to required grade, dry, and not over-excavated.

3.02 PREPARATION

A. Ream pipe and tube ends. Remove burrs. Bevel plain end ferrous pipe.

B. Remove scale and dirt, on inside and outside, before assembly.

C. Prepare piping connections to equipment with flanges or unions.

3.03 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Route piping in orderly manner and maintain gradient. Route parallel and perpendicular to walls.

C. Install piping to maintain headroom, conserve space, and not interfere with use of space.

D. Group piping whenever practical at common elevations.

E. Provide clearance in hangers and from structure and other equipment for installation of insulation and access to valves and fittings.

F. Provide access where valves and fittings are not exposed.

G. Install valves with stems upright or horizontal, not inverted.

H. Pipe Hangers and Supports:

1. Install in accordance with ASME B31.9.

2. Support horizontal piping as indicated.

Event Austin MN National Guard Armory Boiler Plant Replacement

Facility Natural-Gas Piping 23 11 23 - 4

3. Install hangers to provide minimum 1/2 inch space between finished covering and adjacent work.

4. Place hangers within 12 inches of each horizontal elbow.

5. Use hangers with 1-1/2 inch minimum vertical adjustment. Design hangers for pipe movement without disengagement of supported pipe.

6. Support vertical piping at every other floor. Support riser piping independently of connected horizontal piping.

7. Where several pipes can be installed in parallel and at same elevation, provide multiple or trapeze hangers.

3.04 APPLICATION

A. Install ball valves for shut-off and to isolate equipment, part of systems, or vertical risers.

3.05 INDOOR PIPING INSTALLATION

A. Comply with NFPA 54 and the International Fuel Gas Code for installation and purging of natural gas piping.

B. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, and other design considerations. Install piping as indicated unless deviations to layout are approved on Coordination Drawings.

C. Arrange for pipe spaces, chases, slots, sleeves, and openings in building structure during progress of construction, to allow for mechanical installations.

D. Install piping in concealed locations unless otherwise indicated and except in equipment rooms and service areas.

E. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise.

F. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal.

G. Locate valves for easy access.

H. Install gas piping at uniform grade of 2 percent down toward drip and sediment traps.

I. Install piping free of sags and bends.

J. Install fittings for changes in direction and branch connections.

K. Verify final equipment locations for roughing-in.

L. Drips and Sediment Traps: Install drips at points where condensate may collect, including service-meter outlets. Locate where readily accessible to permit cleaning and emptying. Do not install where condensate is subject to freezing.

1. Construct drips and sediment traps using tee fitting with bottom outlet…