22. Attachment G - HVAC Specifications AMD 0001.pdf

Attachment G

HVAC Specifications AMD 0001

89503222BWA000051

15 July 2022

WAPA LOVELL SUBSTATION BUILDING

PROJECT SPECIFICATIONS

ISSUED FOR CONSTRUCTION

WAPA

Lovell Substation Building

Lovell, WY

WAPA Project No.

89503019DWA000006/89503022FWA400565

BMcD Project No. 146995

Revision 1 June 24, 2022

Burns & McDonnell World Headquarters 9400 Ward Parkway Kansas City, MO 64114

O 816-333-9400 F 816-333-3690 www.burnsmcd.com

CERTIFICATION – 1

LOVELL SUBSTATION BUILDING ISSUED FOR CONSTRUCTION - REV 1

BMCD: 146995 06/24/2022

CERTIFICATION

LOVELL SUBSTATION BUILDING

WAPA – LOVELL, WY

PROJECT SPECIFICATIONS

MECHANICAL REQUIREMENTS CERTIFICATION: Division 22, Division 23

BURNS & MCDONNELL ENGINEERING, INC.

I hereby certify that this plan, specification, or report was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the laws of the state of Minnesota.

Date: 24 June 2022

Signature:

Printed Name: David Olsen, PE License No. 17729

TECHNICAL SPECIFICATIONS WAPA

TABLE OF CONTENTS LOVELL – SUBSTATION BUILDING

ISSUED FOR: CONSTRUCTION BURNS & McDONNELL REVISION NO. 0

06/24/2022 TOC-0

TABLE OF CONTENTS

DIV 22

22 00 00 – PLUMBING, GENERAL PURPOSE

DIV 23

23 03 00 – BASIC MECHANICAL MATERIALS AND METHODS

23 05 13 – COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT

23 05 93 – TESTING, ADJUSTING, AND BALANCING FOR HVAC

23 07 00 – THERMAL INSULATION FOR MECHANICAL SYSTEMS

23 23 00 – REFRIGERANT PIPING

23 31 13 – METAL DUCTS

23 37 13 – DIFFUSERS, REGISTERS, AND GRILLES

23 72 00 – AIR-TO-AIR ENERGY RECOVERY EQUIPMENT

23 81 00 – UNITARY AIR CONDITIONING EQUIPMENT

23 82 33 – CONVECTORS

STANDARD 11 – SERVICE BUILDING

22 00 00 – PLUMBING, GENERAL PURPOSE 1

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

06/24/2022

22 00 00 – PLUMBING, GENERAL PURPOSE

1. GENERAL:

(1) Submittals: Submit in accordance with Section 01 00 00, “General Requirements”.

Standard Products: Specified materials and equipment shall be standard products of a manufacturer regularly engaged in the manufacture of such products.

1) Service Support: The equipment items shall be supported by service organizations.

Submit a certified list of qualified permanent service organizations for support of the equipment which includes their addresses and qualifications. These service organizations shall be reasonably convenient to the equipment installation and able to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

2) Manufacturer's Nameplate: Each item of equipment shall have a nameplate bearing the manufacturer's name, address, model number, and serial number securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable.

(2) Delivery, Storage, and Handling: Handle, store, and protect equipment and materials to prevent damage before and during installation in accordance with the manufacturer's recommendations, and as approved by the COR. Replace damaged or defective items.

(3) Regulatory Requirements: Unless otherwise required herein, plumbing work shall be in accordance with ICC IPC. Energy consuming products and systems shall be in accordance with PL 109-58 and ASHRAE 90.1.

(4) Project/Site Conditions: The Contractor shall become familiar with details of the work, verify dimensions in the field, and advise the COR of any discrepancy before performing any work.

(5) Accessibility of Equipment: Install all work so that parts requiring periodic inspection, operation, maintenance, and repair are readily accessible. Install concealed valves, expansion joints, controls, dampers, and equipment requiring access, in locations freely accessible through access doors.

2. PRODUCTS:

(1) Materials: Material or equipment containing lead shall not be used in any potable water system. In line devices such as water meters, building valves, check valves, meter stops, valves, fittings and back flow preventers shall comply with PL 93-523 and NSF/ANSI 61, Section 8. End point devices such as lavatory faucets, supply stops and end point control valves used to dispense water for drinking must meet the requirements of NSF/ANSI 61, Section 9 Plastic pipe shall not be installed in air plenums.

1) Pipe Joint Materials: Solder containing lead shall not be used with copper pipe. Joints and gasket materials shall conform to the following:

a. Malleable Iron ASTM A47/A47M, Grade 32510. Copper ASTM A536.

b. Brazing Material: Brazing material shall conform to AWS A5.8/A5.8M, BCuP-5.

c. Brazing Flux: Flux shall be in paste or liquid form appropriate for use with brazing material. Flux shall be as follows: lead-free; have a 100 percent flushable residue;

contain slightly acidic reagents; contain potassium borides; and contain fluorides.

d. Solder Material: Solder metal shall conform to ASTM B32.

22 00 00 – PLUMBING, GENERAL PURPOSE 2

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

06/24/2022

e. Solder Flux: Flux shall be liquid form, non-corrosive, and conform to ASTM B813, Standard Test 1.

f. Plastic Solvent Cement for PVC Plastic Pipe: ASTM D2564 and ASTM D2855.

g. Plastic Solvent Cement for CPVC Plastic Pipe: ASTM F493.

h. Press fittings for Copper Pipe and Tube: Copper press fittings shall conform to the material and sizing requirements of ASME B16.18 or ASME B16.22 and performance criteria of IAPMO PS 117. Sealing elements for copper press fittings shall be EPDM, FKM or HNBR. Sealing elements shall be factory installed or an alternative supplied fitting manufacturer. Sealing element shall be selected based on manufacturer's approved application guidelines.

i. Copper tubing shall conform to ASTM B88, Type K, L or M.

(2) Pipe Insulation Material: Insulation shall be as specified in Section 23 07 00 THERMAL

INSULATION FOR MECHANICAL SYSTEMS.

(3) Pipe Hangers, Inserts, and Supports: Pipe hangers, inserts, and supports shall conform to

MSS SP-58.

(4) Traps: Unless otherwise specified, traps shall be without a cleanout.

3. EXECUTION:

(1) General Installation Requirements: Piping located in air plenums shall conform to NFPA 90A requirements. Piping located in shafts that constitute air ducts or that enclose air ducts shall be noncombustible in accordance with NFPA 90A. Installation of plastic pipe where in compliance with NFPA may be installed in accordance with PPFA Fire Man. The plumbing system shall be installed complete with necessary fixtures, fittings, traps, valves, and accessories. Water and drainage piping shall be extended 5 feet outside the building, unless otherwise indicated.

(2) Tests, Flushing and Disinfection:

1) Defective Work: If inspection or test shows defects, such defective work or material shall be replaced or repaired as necessary and inspection and tests shall be repeated. Repairs to piping shall be made with new materials. Caulking of screwed joints or holes will not be acceptable.

2) Operational Test: Upon completion of flushing and prior to disinfection procedures, the Contractor shall subject the plumbing system to operating tests to demonstrate satisfactory installation, connections, adjustments, and functional and operational efficiency.

23 03 00 BASIC MECHANICAL MATERIALS AND METHODS 3

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

23 03 00 BASIC MECHANICAL MATERIALS AND METHODS:

(2) Quality Assurance:

1) Material and Equipment Qualifications: Provide materials and equipment that are standard products of manufacturers regularly engaged in the manufacture of such products, which are of a similar material, design and workmanship.

2) Service Support: The equipment items shall be supported by service organizations.

Submit a certified list of qualified permanent service organizations for support of the equipment which includes their addresses and qualifications. These service organizations shall be reasonably convenient to the equipment installation and able to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

3) Manufacturer's Nameplate: Each item of equipment shall have a nameplate bearing the manufacturer's name, address, model number, and serial number securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable.

(3) Delivery, Storage, and Handling: Handle, store, and protect equipment and materials to prevent damage before and during installation in accordance with the manufacturer's recommendations, and as approved by the COR. Replace damaged or defective items.

(4) Electrical Requirements: Furnish internal wiring for components of packaged equipment as an integral part of the equipment. Extended voltage range motors will not be permitted.

Controllers and contactors shall have a maximum of 120 volt control circuits, and shall have auxiliary contacts for use with the controls furnished. When motors and equipment furnished are larger than sizes indicated, the cost of additional electrical service and related work shall be included under the section that specified that motor or equipment.

(5) Electrical Installation Requirements: Electrical installations shall conform to IEEE C2, NFPA

70, and requirements specified herein.

1) Provide electrical components of mechanical equipment, such as motors, motor starters (except starters/controllers which are indicated as part of a motor control center), control or push-button stations, float or pressure switches, solenoid valves, integral disconnects, and other devices functioning to control mechanical equipment, as well as control wiring and conduit for circuits rated 100 volts or less, to conform with the requirements of the section covering the mechanical equipment. Extended voltage range motors shall not be permitted. The interconnecting power wiring and conduit, control wiring rated 120 volts (nominal) and conduit, and the electrical power circuits shall be provided, except internal wiring for components of package equipment shall be provided as an integral part of the equipment. When motors and equipment furnished are larger than sizes indicated, provide any required changes to the electrical service as may be necessary and related work as a part of the work for the section specifying that motor or equipment.

2) High Efficiency Motors:

a. High Efficiency Single-Phase Motors: Unless otherwise specified, single-phase fractional-horsepower alternating-current motors shall be high efficiency types corresponding to the applications listed in NEMA MG 11.

23 03 00 BASIC MECHANICAL MATERIALS AND METHODS 4

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

b. High Efficiency Polyphase Motors: Unless otherwise specified, polyphase motors shall be selected based on high efficiency characteristics relative to the applications as listed in NEMA MG 10. Additionally, polyphase squirrel-cage medium induction motors with continuous ratings shall meet or exceed energy efficient ratings in accordance with Table 12-6C of NEMA MG 1.

3) Three-Phase Motor Protection: Provide controllers for motors rated one 1 horsepower and larger with electronic phase-voltage monitors designed to protect motors from phase-loss, undervoltage, and overvoltage. Provide protection for motors from immediate restart by a time adjustable restart relay.

(6) Instruction to Government Personnel: When specified in other sections, furnish the services of competent instructors to give full instruction to the designated Government personnel in the adjustment, operation, and maintenance, including pertinent safety requirements, of the specified equipment or system. Instructors shall be thoroughly familiar with all parts of the installation and shall be trained in operating theory as well as practical operation and maintenance work. Instruction shall be given during the first regular work week after the equipment or system has been accepted and turned over to the Government for regular operation.

(7) Accessibility: Install all work so that parts requiring periodic inspection, operation, maintenance, and repair are readily accessible. Install concealed valves, expansion joints, controls, dampers, and equipment requiring access, in locations freely accessible through access doors.

2. PRODUCTS: Not used.

(1) Painting of New Equipment: New equipment painting shall be factory applied and shall be as specified herein, and provided under each individual section.

1) Factory Painting Systems:

a. Manufacturer's standard factory painting systems may be provided subject to certification that the factory painting system applied will withstand 125 hours in a salt-spray fog test, except that equipment located outdoors shall withstand 500 hours in a salt-spray fog test. Salt-spray fog test shall be in accordance with ASTM B117, and for that test the acceptance criteria shall be as follows: immediately after completion of the test, the paint shall show no signs of blistering, wrinkling, or cracking, and no loss of adhesion; and the specimen shall show no signs of rust creepage beyond

0.125 inch on either side of the scratch mark.

b. The film thickness of the factory painting system applied on the equipment shall not be less than the film thickness used on the test specimen. If manufacturer's standard factory painting system is being proposed for use on surfaces subject to temperatures above 120 degrees F, the factory painting system shall be designed for the temperature service.

23 05 13 - COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT 1

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

23 05 13 COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT:

(1) 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 600V and installed at equipment manufacturer's factory or shipped separately by equipment manufacturer for field installation.

(2) Submittals: Submit in accordance with Section 01 00 00, “General Requirements”.

(3) Reference Standards (latest edition):

1) The Institute of Electrical and Electronics Engineers, Inc. (IEEE):

a. IEEE 841-2021 - Standard for Petroleum and Chemical Industry - Severe Duty Totally Enclosed Fan-Cooled (TEFC) Squirrel Cage Induction Motors - Up to and Including 370 kW (500 hp).

2) National Electrical Manufacturers Association (NEMA):

a. NEMA MG 1 - Motors and Generators.

(4) 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.

(1) General Motor Requirements:

1) Comply with requirements in this Section except when stricter requirements are specified in HVAC equipment schedules or Sections.

2) Comply with NEMA MG 1 unless otherwise indicated.

(2) Motor Characteristics:

1) Duty: Continuous duty at ambient temperature of 97.5º F and at altitude of 3,832 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.

(3) Polyphase Motors:

23 05 13 - COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT 2

1) Polyphase motors shall be energy efficient, Design B, medium induction motors as defined by NEMA MG 1.

2) Provide motors with service factor of 1.15 with random-wound squirrel cage rotor.

3) Motor bearing shall be regreasable, shielded, antifriction ball bearings suitable for radial and thrust loading.

4) Temperature rise must match the insulation rating.

5) Insulation shall be Class F

6) Provide motors smaller than 15 HP with manufacturer’s standard starting characteristic.

(4) Polyphase Motors with Additional Requirements:

1) Motors Used with Variable Frequency Controllers: Ratings, characteristics, and features coordinated with and approved by controller manufacturer.

a. Windings: Copper magnet wire with moisture-resistant insulation varnish, designed and tested to resist transient spikes, high frequencies, and short time rise pulses produced by pulse-width modulated inverters.

b. Bearing Protection: All motors operated on variable frequency drives shall be equipped with maintenance free, 360 degree circumferential conductive microfiber shaft grounding ring with a minimum two continuous rows of conductive micro fibers completely surrounding the motor shaft to discharge electrical shaft voltages away from the motor’s bearings to ground. Note: Friction/spring contact brushes shall not be acceptable.

c. Provide controllers for motors rated one (1) horsepower and larger with electronic phase-voltage monitors designed to protect motors from phase-loss, undervoltage, and overvoltage. Provide protection for motors from immediate restart by a time adjustable restart delay.

d. Application Note: Motors up to 100HP shall be provided with a minimum of one shaft grounding ring as described above installed by the manufacturer internally to the motor or externally on the drive end. Grounding rings shall be provided and installed by the motor manufacturer or contractor and shall be installed in accordance with the manufacturer’s recommendations.

e. Energy- and Premium-Efficient Motors: Class B temperature rise; Class F insulation.

f. Inverter-Duty Motors: Class F temperature rise; Class H insulation.

g. Thermal Protection: Comply with NEMA MG 1 requirements for thermally protected motors.

2) Severe-Duty Motors: Comply with IEEE 841, with 1.15 minimum service factor.

(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.

23 05 13 - COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT 3

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.

3. EXECUTION: Not used.

23 05 93 - TESTING, ADJUSTING, AND BALANCING FOR HVAC 1

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

23 05 93 TESTING, ADJUSTING, AND BALANCING FOR HVAC

(1) Work Description: The work includes duct air leakage testing (DALT) and testing, adjusting, and balancing (TAB) of new and existing heating, ventilating, and cooling (HVAC) air and water distribution systems including equipment and performance data, ducts, and piping which are located within, on, under, between, and adjacent to buildings, including records of existing conditions.

Perform TAB in accordance with the requirements of the TAB procedural standard recommended by the TAB trade association that approved the TAB Firm's qualifications.

Comply with requirements of AABC MN-1, NEBB PROCEDURAL STANDARDS, or SMACNA 1780 (TABB) as supplemented and modified by this specification section. All recommendations and suggested practices contained in the TAB procedural standards are considered mandatory.

(2) Submittals: Submit in accordance with Section 01 00 00, “General Requirements”. Submittals shall include, but shall not be limited to: Current certification(s) with TAB trade association, current instrument calibration reports, all test reports, and warranty documentation.

(3) Quality Assurance:

1) TAB Standard: Perform TAB in accordance with the requirements of the standard under which the TAB Firm's qualifications are approved, i.e., AABC MN-1, NEBB PROCEDURAL STANDARDS, or SMACNA 1780 unless otherwise specified herein. All recommendations and suggested practices contained in the TAB Standard are considered mandatory. Use the provisions of the TAB Standard, including checklists, report forms, etc., as nearly as practical, to satisfy the Contract requirements.

(4) Test Reports:

1) Data from DALT Field Work:

a. Report format: Submit report data on Air Duct Leakage Test Summary Report Forms as shown on Page 6-2 of SMACNA 1143.

2) Certified TAB Reports:

a. Report format: Submit the TAB Engineering Report. Report forms and report data must be typewritten. Handwritten report forms or report data are not acceptable.

(5) Project Conditions:

1) Partial Owner Occupancy: Owner may occupy completed areas of building before Substantial Completion. Cooperate with Owner during TAB operations to minimize conflicts with Owner's operations.

(6) Coordination:

1) Coordinate the efforts of factory-authorized service representatives for systems and equipment, HVAC controls installers, and other mechanics to operate HVAC systems and equipment to support and assist TAB activities.

2) Notice: Provide seven days' advance notice for each test. Include scheduled test dates and times.

3) Perform TAB after leakage and pressure tests on air distribution systems have been

23 05 93 - TESTING, ADJUSTING, AND BALANCING FOR HVAC 2

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

satisfactorily completed.

(7) Warranty: Furnish workmanship and performance warranty for the DALT and TAB system work performed for a period not less than 1 year from the date of Government acceptance of the work; issued directly to the Government. Include provisions that if within the warranty period the system shows evidence of major performance deterioration, or is significantly out of tolerance, resulting from defective TAB or DALT workmanship, the corrective repair or replacement of the defective materials and correction of the defective workmanship is the responsibility of the TAB firm. Perform corrective action that becomes necessary because of defective materials and workmanship while system TAB and DALT is under warranty 7 days after notification, unless additional time is approved by the Contracting Officer. Failure to perform repairs within the specified period of time constitutes grounds for having the corrective action and repairs performed by others and the cost billed to the TAB firm. The Contractor must also provide a 1 year contractor installation warranty.

2. PRODUCTS: Not used.

(1) Work Descriptions of Participants: Comply with requirements of this section as specified.

(2) DALT Procedures:

1) Instruments, Consumables and Personnel: Provide instruments, consumables and personnel required to accomplish the DALT field work. Calibrate and maintain instruments in accordance with manufacturer's written procedures.

2) DALT Testing: Perform DALT on the HVAC duct sections of each system. Use the duct class, seal class, leakage class and the leak test pressure data indicated on the drawings, to comply with the procedures specified in SMACNA 1143.

3) Quality Assurance:

a. If any of the duct sections checked for a given system are determined to have a leakage rate measured that exceeds the leakage rate allowed by SMACNA Leak Test Manual for an indicated duct construction class and sealant class, terminate data checking for that section. Make the necessary corrections.

4) Certified Final DALT Report:

a. On successful completion of all field checks of all systems, submit the Final DALT Report to the COR for approval.

5) Prerequisite for TAB Field Work: Do not commence TAB field work prior to the completion and approval of the Final DALT Report.

(3) Tab Procedures:

1) TAB Field Work:

a. Test, adjust, and balance the HVAC systems until measured flow rates (air and water flow) are within plus or minus 5 percent of the design flow rates as indicated.

b. That is, comply with the requirements of AABC MN-1 and AABC MN-4, NEBB PROCEDURAL STANDARDS, NEBB MASV, or SMACNA 1780 (TABB) and SMACNA 1858 (TABB), except as supplemented and modified by this section.

c. Provide instruments and consumables required to accomplish the TAB work.

Calibrate and maintain instruments in accordance with manufacturer's written

23 05 93 - TESTING, ADJUSTING, AND BALANCING FOR HVAC 3

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

procedures.

2) Workmanship: This TAB work includes adjustment of balancing valves, balancing dampers, and sheaves. Further, this TAB work includes changing out fan sheaves and pump impellers if required to obtain air and water flow rates specified or indicated. If, with these adjustments and equipment changes, the specified or indicated design flow rates cannot be attained, contact the COR for direction.

3) TAB Reports:

a. Except as approved otherwise in writing by the COR, the TAB work and thereby the TAB report is considered incomplete until the TAB work is accomplished to within the accuracy range specified.

(4) Marking of Settings: Upon the final TAB work approval, permanently mark the settings of HVAC adjustment devices including valves, gauges, splitters, and dampers so that adjustment can be restored if disturbed at any time. Provide permanent markings clearly indicating the settings on the adjustment devices which result in the data reported on the submitted TAB report.

(5) Marking of Test Ports: The TAB team is to permanently and legibly mark and identify the location points of the duct test ports. If the ducts have exterior insulation, make these markings on the exterior side of the duct insulation. Show the location of test ports on the as-built mechanical drawings with dimensions given where the test port is covered by exterior insulation.

(6) Procedures for Motors:

1) Motors, 1/2 HP and Larger: Test at final balanced conditions and record the following data:

a. Manufacturer's name, model number, and serial number.

b. Motor horsepower rating.

c. Motor rpm.

d. Efficiency rating.

e. Nameplate and measured voltage, each phase.

f. Nameplate and measured amperage, each phase.

g. Starter thermal-protection-element rating.

2) Motors Driven by Variable-Frequency Controllers: Test for proper operation at speeds varying from minimum to maximum. Test the manual bypass of the controller (if provided) to prove proper operation. Record observations including name of controller manufacturer, model number, serial number, and nameplate data.

(7) Procedures for Condensing Units;

1) Verify proper rotation of fans.

2) Measure entering- and leaving-air temperatures.

3) Record compressor data.

23 05 93 - TESTING, ADJUSTING, AND BALANCING FOR HVAC 4

23 07 00 - THERMAL INSULATION FOR MECHANICAL SYSTEMS 1

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

23 07 00 THERMAL INSULATION FOR MECHANICAL SYSTEMS:

(1) System Description:

1) General: Provide field-applied insulation and accessories on mechanical systems as specified herein; factory-applied insulation is specified under the piping, duct or equipment to be insulated. Field applied insulation materials required for use on Government-furnished items be furnished and installed by the Contractor.

(2) Submittals: Submit in accordance with Section 01 00 00, “General Requirements”:

1) Installer Qualification: Qualified installers shall have successfully completed three or more similar type jobs within the last 5 years.

(4) Delivery, Storage, and Handling: Insulation material containers shall be marked by manufacturer with appropriate ASTM standard designation, type and grade, and maximum use temperature. Materials shall be delivered in the manufacturer's unopened containers. Materials delivered and placed in storage shall be provided with protection from weather, humidity, dirt, dust and other contaminants. Insulation packages and containers shall be asbestos free.

(5) Coordination:

1) Coordinate sizes and locations of supports, hangers, and insulation shields specified in Section 23 05 29 - Hangers and Supports for HVAC Piping and Equipment.

2) Coordinate clearance requirements with duct Installer for duct insulation application.

Before preparing ductwork Shop Drawings, establish and maintain clearance requirements for installation of insulation and field-applied jackets and finishes and for space required for maintenance.

(6) Scheduling:

1) Schedule insulation application after pressure testing systems and, where required, after installing and testing heat tracing. Insulation application may begin on segments that have satisfactory test results.

2) Complete installation and concealment of plastic materials as rapidly as possible in each area of construction.

(1) Product Sustainability Criteria: For products in this section, where applicable and to extent allowed by performance criteria, provide and document the following:

1) Reduce Volatile Organic Compounds (VOC) for Caulking, Sealant and Adhesive Materials

2) For interior applications, provide caulking, mastic, sealant and adhesive materials meeting the reduced VOC requirements.

3) Recycled Content for Pipe and Ductwork Insulation Materials

(2) Standard Products: Provide materials which are the standard products of manufacturers regularly engaged in the manufacture of such products. Submit a complete list of materials, 23 07 00 - THERMAL INSULATION FOR MECHANICAL SYSTEMS 2

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

06/24/2022 including manufacturer's descriptive technical literature, performance data, catalog cuts, and installation instructions. The product number, k-value, thickness and furnished accessories including adhesives, sealants and jackets for each mechanical system requiring insulation shall be included. The product data must be copyrighted, have an identifying or publication number, and shall have been published prior to the issuance date of this solicitation.

1) Insulation System: Provide insulation systems in accordance with the approved MICA National Insulation Standards plates as supplemented by this specification. Provide field-applied insulation for heating, ventilating, and cooling (HVAC) air distribution systems and piping systems that are located within, on, under, and adjacent to buildings; and for plumbing systems. Provide CFC and HCFC free insulation.

2) Surface Burning Characteristics: Unless otherwise specified, insulation must have a maximum flame spread index of 25 and a maximum smoke developed index of 50 when tested in accordance with ASTM E84. Flame spread, and smoke developed indexes, shall be determined by ASTM E84 or UL 723. Test insulation in the same density and installed thickness as the material to be used in the actual construction. Prepare and mount test specimens according to ASTM E2231.

3) Securements: Provide insulation manufacturer’s recommended securement system for insulation material used and install per manufacturer’s requirements.

4) Jackets: Provide factory or field installed jackets as required to protect insulation material and provide vapor barrier (for below ambient pipes, ducts, and equipment) if not otherwise provided. Exterior insulation shall be provided with rigid aluminum or stainless-steel jacket. Jacket shall be installed and secured as required by jacket manufacturer and shall be sealed watertight.

(3) Materials: Provide insulation that meets or exceed the requirements of the latest version of ASHRAE 90.1. Insulation exterior shall be cleanable, grease resistant, non-flaking and non-peeling. Materials shall be compatible and shall not contribute to corrosion, soften, or otherwise attack surfaces to which applied in either wet or dry state. Materials to be used on stainless steel surfaces shall meet ASTM C795 requirements. Materials shall be asbestos free. Provide product recognized under UL 94 (if containing plastic) and listed in FM APP

GUIDE.

(1) General: At minimum, insulation shall be applied to piping, duct, and equipment with operating surface temperatures either above or below ambient temperature for the purpose of life safety, energy conservation, and condensation mitigation.

1) All surfaces to receive insulation shall be cleaned and dried and all materials adversely affecting insulation application shall be removed.

2) Install insulation continuously through wall penetrations and seal penetration with flashing sealant. Provide firestop at all penetrations through fire-rated walls and partitions.

3) Flexible elastomeric cellular insulation shall not be compressed at joists, studs, columns, ducts, hangers, etc. The insulation shall not pull apart after a one-hour period; any insulation found to pull apart after one hour, shall be replaced.

(2) Pipe Insulation Systems Installation: Install pipe insulation systems in accordance with the approved MICA Insulation Stds plates as supplemented by the manufacturer's published installation instructions.

1) Refrigerant pipe shall be provided with minimum 1-inch thick flexible elastomeric insulation. Insulation thickness shall comply with current edition of ASHRAE 90.1.

Exterior piping shall be provided with rigid metal jacket. Where insulated line sets are

23 07 00 - THERMAL INSULATION FOR MECHANICAL SYSTEMS 3

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

approved and used, provide line set cover on exterior piping.

(3) Duct Insulation Systems Installation: Install duct insulation systems in accordance with the approved MICA Insulation Stds plates as supplemented by the manufacturer’s published installation instructions. Duct insulation minimum thickness and insulation level must meet or exceed the requirements of ASHRAE 90.1.

1) Supply, return, and outside air ductwork shall be provided with minimum 2-inch thick, 1.5-lb/cu. ft. nominal density external fiberglass board insulation. Insulation thickness shall comply with current edition of ASHRAE 90.1.

• Other ductwork systems connection to the building exterior shall be similarly insulated for at least the first 10 feet from the exterior penetration.

(4) Equipment Insulation Systems Installation: Install equipment insulation systems in accordance with the approved MICA Insulation Stds plates as supplemented by the manufacturer’s published installation instructions.

23 23 00 - REFRIGERANT PIPING 1

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

23 05 15 REFRIGERANT PIPING:

(1) Summary: This Section includes refrigerant piping used for air-conditioning applications.

(2) Submittals: Submit in accordance with Section 01 00 00, “General Requirements”:

1) Refrigerant piping indicated on Drawings is schematic only. Size piping and design actual piping layout, including oil traps, double risers, specialties, and pipe and tube sizes to accommodate, as a minimum, equipment provided, elevation difference between compressor and evaporator, and length of piping to ensure proper operation and compliance with warranties of connected equipment.

(3) Performance Requirements:

1) Line Test Pressure for Hot-Gas and Liquid Lines for Refrigerant R-410A: 535 psig or manufacturer recommended pressure, whichever is more restrictive.

(4) Product Storage and Handling:

1) Handle, store, and protect materials to prevent damage before and during installation in accordance with the manufacturer’s recommendations, and as approved by the COR.

Replace damaged or defective items. Store piping in a clean and protected area with end caps in place to ensure that piping interior and exterior are clean when installed.

(5) Coordination:

1) Coordinate size and location of roof curbs, equipment supports, and roof penetrations.

(1) Copper Tube and Fittings:

1) Copper Tube shall be ASTM B88, Type K or L or ASTM B280, Type ACR. Wrought- Copper Fittings shall be ASME B16.22. Wrought-Copper Unions shall be ASME B16.22.

For Brazing Filler Metals provide silver alloy brazing filler metal in compliance with AWS A5.8 BCuP-5, similar to Sil-Fos 15 alloy.

2) Flexible Connectors: Body shall be tin-bronze bellows with woven, flexible, tinned-bronze-wire-reinforced protective jacket. End connections shall be socket ends. Offset performance shall be capable of minimum 3/4-inch misalignment in minimum 7-inch long assembly. Maximum operating temperature rating shall be 250ºF and factory pressure test shall be completed at minimum 500 psig.

(2) Valves and Specialties: Valves shall be as required by air conditioning equipment manufacturer and as indicated below. Where information conflicts, provide more robust product.

1) Refrigeration Duty Full Port Ball Valves: Body shall be forged brass. Ball shall be full port to match line size. Operation shall have 90-degree travel from open to close. End connections shall be sweat. Working pressure rating shall be 500 psig and maximum operating temperature shall be 300°F.

2) Service Valves: Body: Body shall be forged brass with brass cap including key end to remove core. Core shall be removable ball-type check valve with stainless-steel spring.

Seat material shall be polytetrafluoroethylene. Valve working pressure rating shall be 500 psig.

23 23 00 - REFRIGERANT PIPING 2

3) Solenoid Valves: Valves shall comply with AHRI 760 and UL 429; listed and labeled by an NRTL. Valve body and bonnet shall be plated steel. Solenoid tube, plunger, closing spring, and seat orifice shall be stainless steel. The seat material shall be polytetrafluoroethylene. Valve shall have molded, watertight coil in NEMA 250 enclosure of type required by location with 1/2-inch (16-GRC) conduit adapter, and 24 or 115Vac coil. Valve working pressure rating shall be 400 psig and maximum operating temperature shall be 240°F. Valve shall have manual operator.

4) Thermostatic Expansion Valves: Comply with AHRI 750. Valve body, bonnet, and seal cap shall be forged brass or steel. Valve diaphragm, piston, closing spring, and seat insert shall be stainless steel. Packing and gaskets shall not contain asbestos. Valve capillary and bulb shall be copper tubing filled with refrigerant charge. For heat pump applications, valves shall be provided with a reverse-flow option. End connections shall be socket, flare, or threaded union. Working pressure rating shall be minimum 450 psig.

(3) Refrigerants: ASHRAE 34, R-410A (Pentafluoroethane/Difluoromethane)

1) Subject to compliance with requirements, provide products by one of the following manufacturers: Atofina Chemicals, Inc.; DuPont Company; Fluorochemicals Div.;

Honeywell, Inc.; Genetron Refrigerants.; INEOS Fluor Americas, LLC.; Or approved equal.

(1) Piping Applications for Refrigerant: Refrigeration lines shall be Type K, Type L, or ACR hard refrigeration duty annealed-tempered copper. Fittings shall be wrought-copper fittings with brazed joints. Select system components with pressure rating equal to or greater than system operating pressure.

(2) Install valves and specialties as required by Drawings and per the manufacturer’s installation requirements and recommendations.

(3) Install refrigerant piping according to ASHRAE 15. Install piping in accessible locations unless otherwise indicated and except in equipment rooms and service areas. Install piping adjacent to machines to allow service and maintenance of machines. Install piing free of sages and bends and install fittings for all changes in direction and branch connections. Install piping as short and direct as possible with minimum number of joints, elbows, and fittings. Install piping with adequate clearance between pipe and adjacent walls and hangers or between pipes for insulation installation.

(4) Slope refrigerant piping as follows:

1) Install horizontal hot-gas discharge piping with a uniform slope downward away from compressor. Liquid lines may be installed level. Install horizontal suction lines with a uniform slope downward to compressor.

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

(5) Install sleeves for piping penetrations of walls, ceilings, and floors. Install sleeve seals for piping penetrations of concrete walls and floors. Install escutcheons for piping penetrations of walls, ceilings, and floors.

(6) Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

(7) Construct brazed joints according to AWS's "Brazing Handbook," Chapter "Pipe and Tube." Fill pipe and fittings with an inert gas (nitrogen or carbon dioxide), during brazing or welding, to prevent scale formation. When brazing, remove solenoid-valve coils and sight glasses; also

23 23 00 - REFRIGERANT PIPING 3

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

06/24/2022 remove valve stems, seats, and packing, and accessible internal parts of refrigerant specialties. Do not apply heat near expansion-valve bulb.

1) Use Type BcuP, copper-phosphorus alloy for joining copper socket fittings with copper pipe. Use Type BAg, cadmium-free silver alloy for joining copper with bronze or steel.

(8) Supporting elements: All elements shall conform to MSS SP 58 except as noted.

1) Provide all necessary piping systems and equipment supporting elements, including but not limited to: building structure attachments; supplementary steel; hanger rods, stanchions, and fixtures; vertical pipe attachments; horizontal pipe attachments; anchors;

guides; and spring-cushion, variable, or constant supports. All supporting elements shall be suitable for stresses imposed by systems pressures and temperatures and natural and other external forces normal to this facility without damage to supporting element system or to work being supported.

2) Install cushion clamps designed for refrigeration piping with insulating and energy absorbing cushion and no direct contact of hangers and refrigerant piping. Clamps shall be designed for 375ºF minimum.

3) Install hangers for copper tubing with the following maximum spacing and minimum rod sizes:

a. NPS 5/8 and smaller: Maximum span, 60 inches; minimum rod size, 1/4 inch.

b. NPS 1: Maximum span, 72 inches; minimum rod size, 1/4 inch.

c. NPS 1-1/4 to NPS 2: Maximum span, 96 inches; minimum rod size, 3/8 inch.

d. NPS 2-1/2; Maximum span, 108 inches; minimum rod size, 3/8 inch.

e. NPS 3 and larger: Maximum 10 feet; minimum rod size 1/2 inch.

4) Vertical risers shall be supported independently of connected horizontal piping, whenever practicable, with fixed or spring supports at the base and at intervals to accommodate system range of thermal conditions. Risers shall be guided for lateral stability. For risers subject to expansion, provide only one rigid support at a point approximately one-third down from the top. Place clamps under fittings unless otherwise specified. Support carbon-steel pipe at each floor and at not more than 15-foot intervals for pipe 2 inches and smaller and at not more than 20-foot intervals for pipe 2-1/2 inches and larger.

(9) Field Quality Control: Perform tests and inspections and prepare test reports.

1) Tests and Inspections shall comply with ASME B31.5, Chapter VI.

2) Test refrigerant piping, specialties, and receivers (where used). Isolate compressor, condenser, evaporator, and safety devices from test pressure if they are not rated above the test pressure.

3) Test high- and low-pressure side piping of each system separately at not less than the pressures indicated in Part 1 "Performance Requirements" Article.

a. Fill system with nitrogen to the required test pressure. System shall maintain test pressure at the manifold gage throughout duration of test.

b. Test joints and fittings with electronic leak detector or by brushing a small amount of soap and glycerin solution over joints. Remake leaking joints using new materials, and retest until satisfactory results are achieved.

23 23 00 - REFRIGERANT PIPING 4

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

(10) System Charging:

1) Install core in filter dryers after leak test but before evacuation.

2) Evacuate entire refrigerant system with a vacuum pump to 500 micrometers (67 Pa).

Refrigerator system shall be evacuated per the following chart, with the vacuum pump off, the system shall hold for 12 hours without loss of vacuum.

Temperature Minimum

Time 90ºF/32ºC 1 Hour 80ºF/27ºC 2 Hours 75ºF/24ºC 3 Hours 70ºF/21ºC 4 Hours 65ºF/18ºC 8 Hours 60ºF/15ºC 36 Hours 55ºF/13ºC 50 Hours 50ºF/10ºC 72 Hours

3) Break vacuum with refrigerant gas, allowing pressure to build up to 2 psig (14 kPa).

(11) Adjusting:

1) Adjust thermostatic expansion valve to obtain proper evaporator superheat.

2) Adjust high- and low-pressure switch settings to avoid short cycling in response to fluctuating suction pressure.

3) Adjust set-point temperature of air-conditioning or chilled-water controllers to the system design temperature.

4) Perform the following adjustments before operating the refrigeration system, according to manufacturer's written instructions:

a. Open shutoff valves in condenser water circuit.

b. Verify that compressor oil level is correct.

c. Open compressor suction and discharge valves.

d. Open refrigerant valves except bypass valves that are used for other purposes.

23 31 13 - METAL DUCTS 1

WAPA – LOVELL SUBSTATION BUILDING REVISION 0 – ISSUED FOR: CONSTRUCTION

23 31 13 METAL DUCTS:

2. PRODUCTS: Include the manufacturer's style or catalog numbers, specification and drawing reference numbers, warranty information, and fabrication site information within material, equipment, and fixture lists.

(1) System Description:

1) Provide low-pressure systems ductwork and plenums where maximum air velocity is 2,000-feet per minute (fpm) and maximum static pressure is 2-inches water gage (wg), positive or negative.

(2) Components:

1) Round Sheet Metal Duct Fittings: Submit offset fitting configurations for approval. Shop fabricate fittings.

a. Fittings Construction: Manufacture as separate fittings, not as tap collars welded or brazed into duct sections.

b. Provide two-piece type miter elbows for angles less than 31 degrees, three-piece type for angles 31 through 60 degrees, and five-piece type for angles 61 through 90 degrees. Ensure centerline radius of elbows is 1-1/2 times fitting cross section diameter.

a. Provide conical type crosses, increasers, reducers, reducing tees, and 90-degree tees.

b. Ensure cutouts in fitting body are equal to branch tap dimension or, where smaller, excess material is flared and rolled into smooth radius nozzle configuration.

2) Reinforcement: Support inner liners of both duct and fittings by metal spacers welded in position to maintain spacing and concentricity.

3) Fittings: Make divided flow fittings as separate fittings, not tap collars into duct sections, with the following construction requirements:

a. Sound, airtight, continuous welds at intersection of fitting body and tap

b. Tap liner securely welded to inner liner, with weld spacing not to exceed 3-inches.

c. Pack insulation around the branch tap area for complete cavity filling.

d. Carefully fit branch connection to cutout openings in inner liner without spaces for air erosion of insulation and without sharp projections that cause noise and airflow disturbance.

Continuously braze seams in the pressure shell of fittings. Protect galvanized areas that have been damaged by welding with manufacturer's standard corrosion-resistant coating.

Construct two-piece type elbows for angles through 35 degrees, three-piece type for angles 36 through 71 degrees, and five-piece type for angles 72 through 90 degrees.

Provide conical type crosses, increasers, reducers, reducing tees, and 90-degree tees.

23 31 13 - METAL DUCTS 2

4) Turning Vanes: Provide double-wall type turning vanes, commercially manufactured for high-velocity system service.

5) Dampers: Construct low pressure drop, high-velocity manual volume dampers, and high-velocity fire dampers in accordance with ASHRAE EQUIP IP HDBK, Chapter 16, ASHRAE FUN IP, Chapter 32 and SMACNA 1966.

6) Flexible Connectors for Sheet Metal: Use UL listed connectors, 30-ounce per square yard, waterproof, fire-retardant, airtight, woven fibrous-glass cloth, double coated with chloroprene. Clear width, not including clamping section, is 6 to 8-inches.

Provide leaded vinyl sheets as a second layer for sound attenuation. Ensure leaded vinyl is not less than 0.055-inch thick, weighing not less than 0.87 pound per square foot, and capable of approximately 10-decibel attenuation in the 10- to 10,000-hertz range.

7) Duct Hangers: For duct hangers in contact with galvanized duct surfaces, provide galvanized steel painted with inorganic zinc.

8) Mill-Rolled Reinforcing and Supporting Materials:

a. Provide mill-rolled structural steel conforming to ASTM A36. Whenever in contact with sheet metal ducting, provide galvanized steel in accordance with ASTM A123.

b. In lieu of mill-rolled structural steel, submit equivalent strength, proprietary-design, rolled- steel structural support systems for approval.

9) Flexible Duct Materials:

Ensure flexible duct connectors comply with NFPA 90A, and conform with UL 181, Class 1 material.

Provide zinc-coated ASTM A123 metal duct; bendable through 180 degrees without damage, with an inside bend radius not greater than one-half the diameter of duct.

Provide wire-reinforced cloth duct consisting of a fibrous-glass cloth bonded to and supported by a corrosion-protected spring steel helix. Fabric may be a laminate of metallic film and fibrous glass. Ensure working pressure rating of ducting is not less than three times maximum system pressure, and the temperature range is minus 20 to plus 175 degrees F.

Provide wire-reinforced fibrous-glass duct consisting of a minimum 1 pound/cubic foot density fibrous glass, bonded to and supported by corrosion-protected spring helix. Vapor barriers are a minimum of 4 mil, pigmented polyvinylchloride film. Ensure duct is bendable without damage through 180 degrees with an inside bend radius not greater than two duct diameters. Minimum wall thickness is 1-inch. Thermal conductivity is not greater than 0.23 BTU per hour per square foot per degrees Fat 75 degrees F mean temperature.