Attach J.1 Vernal FC Furnace_ AC Replacement Specs.pdf

SECTION C - DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK 000001-1

Attach J.1 Section C - Description/Specifications/Statement of Work

GENERAL SPECIFICATIONS

1.1 SCOPE OF CONTRACT

A. BASE BID- This project includes work to replace 2 existing gas-fired furnaces, 2

1.2 refrigerant air coils, and 2 Air cooled refrigerant condensers in-kind and other related work specified in specifications.

Contractor shall remove and replace existing 30 year old Furnaces, Condensers and coils with high efficiency units that are equal or better to existing system. Contractor shall follow submittal procedure for review and approval of proposed furnaces and condenser units.

Unit # 1: Supplies heat and cooling to 1,100 square feet of Office first floor area. The existing furnace/AC unit is a Lenox HS25-411 with BV12436-BNR25. Heating capacity output is 82,000 BTUH. The cooling capacity is 35,000 BTUH.

Unit # 2 : Supplies heat and cooling to 1,600 square feet of Office first floor area. The existing furnace/AC unit is a Lenox HS25-511 with BV12448-BNR29. Heating capacity output is 82,000 BTUH. The cooling capacity is 46,500 BTUH.

Photos of existing furnaces and condensers are included in Attach J.1

Quantities associated with this work are identified in the Schedule of Items.

PROJECT LOCATION

A. The project is located at the Vernal Forest Service Fire Dispatch Office, 355 North Vernal Avenue and at the Vernal Warehouse parking lot, 265 S 500 E in Vernal, Utah.

1.3 SITE INFORMATION AND LIMITATIONS

A. The following site conditions are considered incidental to the contract and the contractor will not be paid directly for any of the following items:

1. Water is available at the site for construction purposes.

2. Toilet facilities are available at the site

3. Electricity is available

1.4 WORK CAMPS, STAGING AND STORAGE AREAS

SECTION C - DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK 000001-2

A. Areas for staging operations and storage of materials shall be approved by the CO. The Contractor must request in writing for approval from the CO to stage trailers.

B. No overnight camping will be allowed on site.

1.5 INSPECTION OF WORKSITE

A. The contractor acknowledges they have taken the necessary steps to ascertain the nature and location of work, and have investigated and satisfied themselves as to the general and local conditions that can affect the work or its cost. Any failure of the contractor to take the actions described and acknowledged in this paragraph will not relieve the Contractor from the responsibility of estimating properly the difficulty and cost of successfully performing the work, or for proceeding to successfully perform the work without additional expenses to the government.

1.6 START DATE

A. Summer 2023

1.7 SITE VISIT:

A. Yes. See Section L.2

1.8 CONTRACT TIME

A. Base Bid: 30 Calendar Days

1.9 SPECIFICATIONS

A. The following specifications are attached. Some sections in the schedule of items refer to other sections not listed and are subsidiary to, or are included in payment for other pay items in this contract. These items are considered incidental and no additional compensation will be made.

000001 - Section C 011900 – Mobilization 013300 - Submittals 232300 – Refrigerant Piping

235416.13 – Gas Fired Furnaces 236313 – Air Cooled Refrigerant Condensers

238216.13 – Refrigerant Air Coils

SECTION C - DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK 000001-3

FIRE DISPATCH CENTER BUILDING

SECTION C - DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK 000001-4

EXISTING FURNACES

SECTION C - DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK 000001-5

EXISTING CONDENSER UNITS

SUBMITTAL PROCEDURES 013300

USDA FOREST SERVICE, R-4 1

VERNAL FIRE CENTER FURNACE/AC UNIT REPLACEMENT 2

SECTION 013300 - SUBMITTAL PROCEDURES 3

PART 1 - GENERAL 4

1.1 SUMMARY 5

A. This Section includes administrative and procedural requirements for submitting Shop 6 Drawings, Product Data, Samples, and other miscellaneous submittals. See Table 7 013300-1 for a summary of required submittals. 8

B. See other specification section within this package for additional requirements on 9 submittal. 10

1.2 SUBMITTAL PROCEDURES 11

A. Coordination: Coordinate preparation and processing of submittals with performance of 12 construction activities. 13

1. Coordinate transmittal of different types of submittals for related parts of the Work 14 so processing will not be delayed because of need to review submittals concurrently 15 for coordination. 16

a. The Contracting Officer (CO) reserves the right to withhold action on a 17 submittal requiring coordination with other submittals until related submittals 18 are received. 19

B. Processing Time: Allow enough time for submittal review, including time for re-20 submittals, as follows. Time for review shall commence on CO's receipt of submittal. 21

1. Initial Review: Allow 14 days for initial review of each submittal. Allow 22 additional time if processing must be delayed to permit coordination with 23 subsequent submittals. CO will advise Contractor when a submittal being 24 processed must be delayed for coordination. 25

2. If intermediate submittal is necessary, process it in same manner as initial submittal. 26

3. Allow 14 days for processing each re-submittal. 27

4. No extension of the Contract Time will be authorized because of failure to transmit 28 submittals enough in advance of the Work to permit processing. 29

C. Identification: Place a permanent label or title block on each submittal for identification. 30

1. Indicate name of firm or entity that prepared each submittal on label or title block. 31

2. Provide a space on label or beside title block to record Contractor's review and 32 approval markings and action taken by CO. 33

3. Include the following information on label for processing and recording action 34 taken: 35

a. Project name. 36

b. Date. 37

c. Name and address of Contractor. 38

d. Name of manufacturer. 39

e. Unique identifier, including revision number. 40

f. Number and title of appropriate Specification Section. 41

g. Drawing number and detail references, as appropriate. 42

h. If more than one item is shown on submittal sheet, identify item. 43

D. Deviations: Highlight, encircle, or otherwise identify deviations from the Contract 44 Documents on submittals. 45

E. Additional Copies: Unless additional copies are required for final submittal, and unless 46 CO observes noncompliance with provisions of the Contract Documents, initial submittal 47 may serve as final submittal. 48

F. Use for Construction: Use only final submittals with mark indicating action taken by CO 49 in connection with construction. 50

1.3 MEASUREMENT AND PAYMENT 51

A. No separate measurement and/or payment will be made for this section. Payment shall 52 be included with work shown in the schedule of items. 53

PART 2 - PRODUCTS 54

2.1 ACTION SUBMITTALS – (Submittals requiring CO approval) 55

A. General: Prepare and submit Action Submittals required by individual Specification 56 Sections. 57

1. Number of Copies: Submit three copies of each submittal, unless otherwise 58 indicated. CO will return two copies. Mark up and retain one returned copy as a 59 Project Record Document. 60

B. Product Data: Collect information into a single submittal for each element of construction 61 and type of product or equipment. 62

1. If information must be specially prepared for submittal because standard printed 63 data are not suitable for use, submit as Shop Drawings, not as Product Data. 64

2. Mark each copy of each submittal to show which products and options are 65 applicable. 66

3. Include the following information, as applicable: 67

a. Manufacturer's written recommendations. 68

b. Manufacturer's product specifications. 69

c. Manufacturer's installation instructions. 70

d. Manufacturer's catalog cuts. 71

e. Wiring diagrams showing factory-installed wiring. 72

f. Compliance with recognized trade association standards. 73

g. Compliance with recognized testing agency standards. 74

C. Shop Drawings: Prepare Project-specific information, drawn accurately to scale. Do not 75 base Shop Drawings on reproductions of the Contract Documents or standard printed 76 data. 77

1. Preparation: Include the following information, as applicable: 78

a. Dimensions. 79

b. Identification of products. 80

c. Fabrication and installation drawings. 81

d. Roughing-in and setting diagrams. 82

e. Wiring diagrams showing field-installed wiring, including power, signal, and 83 control wiring. 84

f. Notation of dimensions established by field measurement. 85

2. Wiring Diagrams: Differentiate between manufacturer-installed and field-installed 86 wiring. 87

D. Contractor's Construction Schedule: The contractor shall submit a Construction 88 Schedule, for approval by CO, in accordance with the contract provisions within 5 day of 89 commencement of work. 90

E. Samples: Prepare physical units of materials or products, including the following: 91

1. Samples for Initial Selection: Submit manufacturer's color charts consisting of 92 units or sections of units showing the full range of colors, textures, and patterns 93 available. 94

2.2 INFORMATIONAL SUBMITTALS – (Submittals NOT requiring CO approval) 95

A. General: Prepare and submit Informational Submittals required by other Specification 96 Sections. 97

1. Number of Copies: Submit three copies of each submittal, unless otherwise 98 indicated. CO will not return copies. 99

2. Certificates and Certifications: Certificates and certifications shall be signed by an 100 officer or other individual authorized to sign documents on behalf of that entity. 101

3. Test and Inspection Reports: Comply with requirements in Section 014100 102 "Quality Control." 103

B. Material Test Reports: Prepare reports written by a qualified testing agency, on testing 104 agency's standard form, indicating and interpreting test results of material for compliance 105 with requirements. 106

C. Field Test Reports: Prepare reports written by a qualified testing agency, on testing 107 agency's standard form, indicating and interpreting results of field tests performed either 108 during installation of product or after product is installed in its final location, for 109 compliance with requirements. 110

D. Maintenance Data: Prepare written and graphic instructions and procedures for operation 111 and normal maintenance of products and equipment. 112

E. Manufacturer's Instructions: Prepare written or published information that documents 113 manufacturer's recommendations, guidelines, and procedures for installing or operating a 114 product or equipment. Include name of product and name, address, and telephone number 115 of manufacturer. 116

PART 3 - EXECUTION 117

3.1 GENERAL 118

A. Review each submittal and check for compliance with the Contract Documents. Note 119 corrections and field dimensions. Mark with approval stamp before submitting to CO. 120

B. Approval Stamp: Stamp each submittal with a uniform, approval stamp. Include Project 121 name and location, submittal number, Specification Section title and number, name of 122 reviewer, date of Contractor's approval, and statement certifying that submittal has been 123 reviewed, checked, and approved for compliance with the Contract Documents. 124

C. CO will not review submittals that do not bear Contractor's approval stamp and will return 125 them without action. 126

D. Submittals not required by the Contract Documents will not be reviewed and may be 127 discarded. 128

E. Substitutions – Whenever materials, products, and equipment are listed by name or brand 129 in the specifications and/or on the drawings, it is used as a measure of quality, utility, or 130 standard. If the Contractor prefers to use any other brand or manufacturer of same quality, 131 appearance and utility to that specified, he shall request substitution as provided below, 132 not less than 30 days before the planned installation of the item. The Contracting Officer 133 will approve or disapprove the request for substitution. 134

F. Requests for substitutions will only be considered if contractor submits the following: 135

1. Complete technical data including drawings, complete performance specifications, 136 test data, samples and performance tests of the article proposed for substitution. 137 Submit additional information if required by Contracting Officer. All items in the 138 above information shall be circled, tagged, or marked in some way to indicate all 139 deviations or differences which the proposed item differs from the originally 140 specified item. 141

2. Similar data as above for item originally specified. All items shall be marked to 142 identify where/how the proposed substitution will differ. 143

3. A statement by the Contractor that the proposed substitution is in full compliance 144 with the contract documents, applicable codes, and laws. 145

4. The Contractor shall be responsible for any effect upon related work in the project 146 for any substitution and shall pay any additional costs generated by any 147 substitutions. 148

3.2 SUBMITTAL SCHEDULE – Submittals shall be made as required by and called for in 149 the drawings and specifications. The following table is a summary of the required 150 submittals for the project - the table is to assist the Contractor and may not be all inclusive 151

– additional submittals may be required by specific specifications: 152

TABLE 013000-1 153

Spec.

Section Section Title

Sub-sec-tion

Required Submittal

235416 GAS FIRED FURNACE

236313 AIR COOLED REFRIGERANT

CONDENSERS

238216 REFRIGERANT AIR COILS

END OF SECTION 013300 155

May 2023 156

REFRIGERANT PIPING 232300 - 1

USDA FOREST SERVICE, R-4

VERNAL FIRE CENTER FURNACE AND AC UNIT REPLACEMENT

SECTION 232300 - REFRIGERANT PIPING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY, Section Includes:

1. Refrigerant pipes and fittings.

2. Refrigerant piping valves and specialties.

3. Refrigerants.

1.3 MEASUREMENT & PAYMENT

A. No separate payment will be made for the work included under this section; rather payment shall be considered to be included in the items of work listed in the Schedule of Items.

1.4 SUBMITTALS

A. Product Data: For each type of valve and refrigerant piping specialty.

1. Include pressure drop, based on manufacturer's test data, for the following:

a. Thermostatic expansion valves.

b. Solenoid valves.

c. Hot-gas bypass valves.

d. Filter dryers.

e. Strainers.

f. Pressure-regulating valves.

B. Shop Drawings:

1. Show layout of refrigerant piping and specialties, including pipe, tube, and fitting sizes; flow capacities; valve arrangements and locations; slopes of horizontal runs; oil traps; double risers; wall and floor penetrations; and equipment connection details.

2. Show piping size and 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. Show interface and spatial relationships between piping and equipment.

REFRIGERANT PIPING 232300 - 2

C. Field quality-control reports.

D. Operation and Maintenance Data: For refrigerant valves and piping specialties to include in maintenance manuals.

1.5 QUALITY ASSURANCE

A. Welding Qualifications: Qualify procedures and personnel according to 2010 ASME Boiler and Pressure Vessel Code: Section IX, "Welding and Brazing Qualifications."

B. Comply with ASHRAE 15, "Safety Code for Refrigeration Systems."

C. Comply with ASME B31.5, "Refrigeration Piping and Heat Transfer Components."

1.6 PRODUCT STORAGE AND HANDLING

A. Store piping with end caps in place to ensure that piping interior and exterior are clean when installed.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Line Test Pressure for Refrigerant R-410A:

1. Suction Lines for Air-Conditioning Applications: 300 psig.

2. Suction Lines for Heat-Pump Applications: 535 psig.

3. Hot-Gas and Liquid Lines: 535 psig.

2.2 COPPER TUBE AND FITTINGS

A. Copper Tube: ASTM B 88, Type K or L] or ASTM B 280, Type ACR].

B. Wrought-Copper Fittings: ASME B16.22.

C. Wrought-Copper Unions: ASME B16.22.

D. Brazing Filler Metals: AWS A5.8/A5.8M.

E. Flexible Connectors:

1. Body: Tin-bronze bellows with woven, flexible, tinned-bronze-wire-reinforced protective jacket.

2. End Connections: Socket ends.

3. Offset Performance: Capable of minimum 3/4-inch misalignment in minimum 7-inch- long assembly.

4. Working Pressure Rating: Factory test at minimum 500 psig.

5. Maximum Operating Temperature: 250 deg F.

2.3 VALVES AND SPECIALTIES

REFRIGERANT PIPING 232300 - 3

A. Diaphragm Packless Valves:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Heldon Products; Henry Technologies.

c. Parker Hannifin Corp.

d. Paul Mueller Company.

2. Body and Bonnet: Forged brass or cast bronze; globe design with straight-through or angle pattern.

3. Diaphragm: Phosphor bronze and stainless steel with stainless-steel spring.

4. Operator: Rising stem and hand wheel.

5. Seat: Nylon.

6. End Connections: Socket, union, or flanged.

7. Working Pressure Rating: 500 psig.

8. Maximum Operating Temperature: 275 deg F.

B. Packed-Angle Valves:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Heldon Products; Henry Technologies.

c. Parker Hannifin Corp.

d. Paul Mueller Company.

2. Body and Bonnet: Forged brass or cast bronze.

3. Packing: Molded stem, back seating, and replaceable under pressure.

4. Operator: Rising stem.

5. Seat: Nonrotating, self-aligning polytetrafluoroethylene.

6. Seal Cap: Forged-brass or valox hex cap.

7. End Connections: Socket, union, threaded, or flanged.

8. Working Pressure Rating: 500 psig.

9. Maximum Operating Temperature: 275 deg F.

C. Check Valves:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Emerson Climate Technologies.

c. Heldon Products; Henry Technologies.

d. Parker Hannifin Corp.

e. Paul Mueller Company.

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REFRIGERANT PIPING 232300 - 4

2. Body: Ductile iron, forged brass, or cast bronze; globe pattern.

3. Bonnet: Bolted ductile iron, forged brass, or cast bronze; or brass hex plug.

4. Piston: Removable polytetrafluoroethylene seat.

5. Closing Spring: Stainless steel.

6. Manual Opening Stem: Seal cap, plated-steel stem, and graphite seal.

7. End Connections: Socket, union, threaded, or flanged.

8. Maximum Opening Pressure: 0.50 psig.

9. Working Pressure Rating: 500 psig.

10. Maximum Operating Temperature: 275 deg F.

D. Service Valves:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following

a. Danfoss Inc.

b. Emerson Climate Technologies.

c. Heldon Products; Henry Technologies.

d. Parker Hannifin Corp.

e. Paul Mueller Company.

f. Refrigeration Sales, Inc.

2. Body: Forged brass with brass cap including key end to remove core.

3. Core: Removable ball-type check valve with stainless-steel spring.

4. Seat: Polytetrafluoroethylene.

5. End Connections: Copper spring.

6. Working Pressure Rating: 500 psig.

E. Thermostatic Expansion Valves: Comply with AHRI 750.

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Emerson Climate Technologies.

c. Heldon Products; Henry Technologies.

d. Paul Mueller Company.

2. Body, Bonnet, and Seal Cap: Forged brass or steel.

3. Diaphragm, Piston, Closing Spring, and Seat Insert: Stainless steel.

4. Packing and Gaskets: Non-asbestos.

5. Capillary and Bulb: Copper tubing filled with refrigerant charge.

6. Suction Temperature: 40 deg F].

7. Superheat: Adjustable] ].

8. Reverse-flow option (for heat-pump applications).

9. End Connections: Socket, flare, or threaded union.

10. Working Pressure Rating: ] 450 psig].

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REFRIGERANT PIPING 232300 - 5

F. Straight-Type Strainers:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Heldon Products; Henry Technologies.

c. Parker Hannifin Corp.

2. Body: Welded steel with corrosion-resistant coating.

3. Screen: 100-mesh stainless steel.

4. End Connections: Socket or flare.

5. Working Pressure Rating: 500 psig.

6. Maximum Operating Temperature: 275 deg F.

G. Angle-Type Strainers:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Heldon Products; Henry Technologies.

c. Parker Hannifin Corp.

2. Body: Forged brass or cast bronze.

3. Drain Plug: Brass hex plug.

4. Screen: 100-mesh monel.

5. End Connections: Socket or flare.

6. Working Pressure Rating: 500 psig.

7. Maximum Operating Temperature: 275 deg F.

H. Moisture/Liquid Indicators:

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Emerson Climate Technologies.

c. Heldon Products; Henry Technologies.

d. Parker Hannifin Corp.

2. Body: Forged brass.

3. Window: Replaceable, clear, fused glass window with indicating element protected by filter screen.

4. Indicator: Color coded to show moisture content in parts per million (ppm).

5. Minimum Moisture Indicator Sensitivity: Indicate moisture above 60 ppm.

6. End Connections: Socket or flare.

7. Working Pressure Rating: 500 psig.

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REFRIGERANT PIPING 232300 - 6

8. Maximum Operating Temperature: 240 deg F.

I. Permanent Filter Dryers: Comply with AHRI 730.

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

a. Danfoss Inc.

b. Emerson Climate Technologies.

c. Heldon Products; Henry Technologies.

d. Parker Hannifin Corp.

2. Body and Cover: Painted-steel shell.

3. Filter Media: 10 micron, pleated with integral end rings; stainless-steel support.

4. Desiccant Media: Activated alumina].

5. Designed for reverse flow (for heat-pump applications).

6. End Connections: Socket.

7. Access Ports: NPS 1/4 connections at entering and leaving sides for pressure differential measurement.

8. Maximum Pressure Loss: 2 psig].

9. Working Pressure Rating: 500 psig.

10. Maximum Operating Temperature: 240 deg F.

2.4 REFRIGERANTS

A. ASHRAE 34, R-410A: Pentafluoroethane/Difluoromethane.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a. Arkema Inc.

b. DuPont Fluorochemicals Div.

c. Genetron Refrigerants; Honeywell International Inc.

d. Mexichem Fluor Inc.

PART 3 - EXECUTION

3.1 PIPING APPLICATIONS FOR REFRIGERANT R-410A

A. Suction Lines NPS 3-1/2 and Smaller for Conventional Air-Conditioning Applications:

Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with brazed joints.

B. Hot-Gas and Liquid Lines, and Suction Lines for Heat-Pump Applications: Copper, Type ACR, annealed- or drawn-temper tubing and wrought-copper fittings with brazed joints.

C. Safety-Relief-Valve Discharge Piping: Copper, Type ACR, annealed- or drawn-temper tubing and wrought-copper fittings with brazed or soldered joints.

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REFRIGERANT PIPING 232300 - 7

3.2 VALVE AND SPECIALTY APPLICATIONS

A. Install diaphragm packless or packed-angle valves in suction and discharge lines of compressor.

B. Install service valves for gage taps at inlet and outlet of hot-gas bypass valves and strainers if they are not an integral part of valves and strainers.

C. Install a check valve at the compressor discharge and a liquid accumulator at the compressor suction connection.

D. Except as otherwise indicated, install diaphragm packless or packed-angle valves on inlet and outlet side of filter dryers.

E. Install a full-size, three-valve bypass around filter dryers.

F. Install solenoid valves upstream from each expansion valve and hot-gas bypass valve.

Install solenoid valves in horizontal lines with coil at top.

G. Install thermostatic expansion valves as close as possible to distributors on evaporators.

1. Install valve so diaphragm case is warmer than bulb.

2. Secure bulb to clean, straight, horizontal section of suction line using two bulb straps. Do not mount bulb in a trap or at bottom of the line.

3. If external equalizer lines are required, make connection where it will reflect suction-line pressure at bulb location.

H. Install safety relief valves where required by 2010 ASME Boiler and Pressure Vessel Code. Pipe safety-relief-valve discharge line to outside according to ASHRAE 15.

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

J. Install strainers upstream from and adjacent to the following unless they are furnished as an integral assembly for the device being protected:

1. Solenoid valves.

2. Thermostatic expansion valves.

3. Hot-gas bypass valves.

4. Compressor.

K. Install filter dryers in liquid line between compressor and thermostatic expansion valve, and in the suction line at the compressor.

L. Install flexible connectors at compressors.

3.3 PIPING INSTALLATION

A. 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, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved on Shop Drawings.

REFRIGERANT PIPING 232300 - 8

B. Install refrigerant piping according to ASHRAE 15.

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

D. 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.

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

F. Install piping adjacent to machines to allow service and maintenance.

G. Install piping free of sags and bends.

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

I. Select system components with pressure rating equal to or greater than system operating pressure.

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

K. Arrange piping to allow inspection and service of refrigeration equipment. Install valves and specialties in accessible locations to allow for service and inspection. Install access doors or panels as specified in Division 08 Sections if valves or equipment requiring maintenance is concealed behind finished surfaces.

L. Install refrigerant piping in protective conduit where installed belowground.

M. Install refrigerant piping in rigid or flexible conduit in locations where exposed to mechanical injury.

N. Slope refrigerant piping as follows:

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

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

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

4. Liquid lines may be installed level.

O. When brazing or soldering, remove solenoid-valve coils and sight glasses; also remove valve stems, seats, and packing, and accessible internal parts of refrigerant specialties.

Do not apply heat near expansion-valve bulb.

P. Install piping with adequate clearance between pipe and adjacent walls and hangers or between pipes for insulation installation.

Q. Identify refrigerant piping and valves according to Section 230553 "Identification for HVAC Piping and Equipment."

REFRIGERANT PIPING 232300 - 9

R. Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Section 230517 "Sleeves and Sleeve Seals for HVAC Piping."

S. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in Section 230517 "Sleeves and Sleeve Seals for HVAC Piping."

T. Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Section 230518 "Escutcheons for HVAC Piping."

3.4 PIPE JOINT CONSTRUCTION

A. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.

B. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

C. Fill pipe and fittings with an inert gas (nitrogen or carbon dioxide), during brazing or welding, to prevent scale formation.

D. Soldered Joints: Construct joints according to ASTM B 828 or CDA's "Copper Tube Handbook."

E. Brazed Joints: Construct joints according to AWS's "Brazing Handbook," Chapter "Pipe and Tube."

1. Use Type BCuP (copper-phosphorus) alloy for joining copper socket fittings with copper pipe.

2. Use Type BAg (cadmium-free silver) alloy for joining copper with bronze or steel.

3.5 HANGERS AND SUPPORTS

A. Comply with requirements for pipe hangers and supports specified in Section 230529 "Hangers and Supports for HVAC Piping and Equipment."

B. Install the following pipe attachments:

1. Adjustable steel clevis hangers for individual horizontal runs less than 20 feet long.

2. Roller hangers and spring hangers for individual horizontal runs 20 feet or longer.

3. Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet or longer, supported on a trapeze.

4. Spring hangers to support vertical runs.

5. Copper-clad hangers and supports for hangers and supports in direct contact with copper pipe.

C. Install hangers for copper tubing with the following maximum spacing and minimum rod diameters:

REFRIGERANT PIPING 232300 - 10

1. NPS 1/2: Maximum span, 60 inches; minimum rod, 1/4 inch.

2. NPS 5/8: Maximum span, 60 inches; minimum rod, 1/4 inch.

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

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

5. NPS 1-1/2: Maximum span, 96 inches; minimum rod, 3/8 inch.

6. NPS 2: Maximum span, 96 inches; minimum rod, 3/8 inch.

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

8. NPS 3: Maximum span, 10 feet; minimum rod, 3/8 inch.

9. NPS 4: Maximum span, 12 feet; minimum rod, 1/2 inch.

D. Support multifloor vertical runs at least at each floor.

3.6 FIELD QUALITY CONTROL

A. Perform the following tests and inspections:

1. Comply with ASME B31.5, Chapter VI.

2. Test refrigerant piping, specialties, and receivers. 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 "Performance Requirements" Article.

a. Fill system with nitrogen to the required test pressure.

b. System shall maintain test pressure at the manifold gage throughout duration of test.

c. Test joints and fittings with electronic leak detector or by brushing a small amount of soap and glycerin solution over joints.

d. Remake leaking joints using new materials, and retest until satisfactory results are achieved.

B. Prepare test and inspection reports.

3.7 SYSTEM CHARGING

A. Charge system using the following procedures:

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

2. Evacuate entire refrigerant system with a vacuum pump to 500 micrometers. If vacuum holds for 12 hours, system is ready for charging.

3. Break vacuum with refrigerant gas, allowing pressure to build up to 2 psig.

4. Charge system with a new filter-dryer core in charging line.

3.8 ADJUSTING

A. Adjust thermostatic expansion valve to obtain proper evaporator superheat.

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

REFRIGERANT PIPING 232300 - 11

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

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

1. Open shutoff valves in condenser water circuit.

2. Verify that compressor oil level is correct.

3. Open compressor suction and discharge valves.

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

5. Check open compressor-motor alignment and verify lubrication for motors and bearings.

END OF SECTION 232300

May 2023

GAS-FIRED FURNACES 235416.13 - 1

VERNAL FIRE CENTER FURNACE AND AC UNIT REPLACEMENT

SECTION 235416.13 - GAS-FIRED FURNACES

PART 1 - GENERAL

1.1 SUMMARY, Section Includes:

1. Gas-fired, condensing furnaces and accessories complete with controls.

2. Air filters.

1.2 MEASUREMENT & PAYMENT

A. No separate payment will be made for the work included under this section; rather payment shall be considered to be included in the items of work listed in the Schedule of Items.

1.3 SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings:

1. Include details of equipment assemblies. Indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

2. Include diagrams for power, signal, and control wiring.

C. Operation and maintenance data.

1.4 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace the following components of furnaces that fail in materials or workmanship within specified warranty period:

1. Warranty Period, Commencing on Date of Substantial Completion:

a. Furnace Heat Exchanger: 5 years.

b. All other components: 1 year.

PART 2 - PRODUCTS

2.1 ASSEMBLY DESCRIPTION

GAS-FIRED FURNACES 235416.13 - 2

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a qualified testing agency, and marked for intended location and application.

B. General Requirements for Noncondensing Gas-Fired Furnaces: Factory assembled, piped, wired, and tested; complying with ANSI Z21.47/CSA 2.3 and NFPA 54.

2.2 GAS-FIRED FURNACES, CONDENSING

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

1. Carrier Corporation; a unit of United Technologies Corp.

2. Daikin

3. Lennox Industries, Inc.; Lennox International.

4. Trane.

B. Cabinet: Steel.

1. Cabinet interior around heat exchanger shall be factory-installed insulation.

2. Lift-out panels shall expose burners and all other items requiring access for maintenance.

3. Factory paint external cabinets in manufacturer's standard color.

4. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

C. Fan: Centrifugal, factory balanced, resilient mounted, direct drive.

1. Multitapped, multispeed with internal thermal protection and permanent lubrication.

2. Electronically controlled motor (ECM) controlled by integrated furnace/blower control.

D. Type of Gas: LPG.

E. Heat Exchanger:

1. Primary: Aluminized steel.

2. Secondary: Stainless steel.

F. Burner:

1. Gas Valve: 100 percent safety modulating main gas valve, main shutoff valve, pressure regulator, safety pilot with electronic flame sensor, limit control, transformer, and combination ignition/fan timer control board.

2. Ignition: Electric pilot ignition, with hot-surface igniter or electric spark ignition.

G. Gas-Burner Safety Controls:

1. Electronic Flame Sensor: Prevents gas valve from opening until pilot flame is proven; stops gas flow on ignition failure.

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GAS-FIRED FURNACES 235416.13 - 3

2. Flame Rollout Switch: Installed on burner box; prevents burner operation.

3. Limit Control: Fixed stop at maximum permissible setting; de-energizes burner on excessive bonnet temperature; automatic reset.

H. Combustion-Air Inducer: Centrifugal fan with thermally protected motor and sleeve bearings prepurges heat exchanger and vents combustion products; pressure switch prevents furnace operation if combustion-air inlet or flue outlet is blocked.

I. Furnace Controls: Solid-state board integrates ignition, heat, cooling, and fan speeds;

adjustable fan-on and fan-off timing; terminals for connection to accessories; diagnostic light with viewport.

J. Accessories:

1. Combination Combustion-Air Intake and Vent: PVC plastic fitting to combine combustion-air inlet and vent through roof.

2. PVC Plastic Vent Materials:

a. PVC Plastic Pipe: Schedule 40, complying with ASTM D 1785.

b. PVC Plastic Fittings: Schedule 40, complying with ASTM D 2466, socket type.

c. PVC Solvent Cement: ASTM D 2564.

1) PVC solvent cement shall have a VOC content of 510 g/L or less.

2) Adhesive primer shall have a VOC content of 550 g/L or less.

3) Solvent cement and adhesive primer shall comply with the testing and product requirements of the California Department of Public Health's (formerly, the California Department of Health Services') "Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers."

K. Capacities and Characteristics: See Drawings.

2.3 AIR FILTERS

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:

1. Aprilaire; Research Products Corp.

2. Filtrete Home Filtration Products; a 3M brand.

3. Flanders.

B. Disposable Filters: 1-inch- thick fiberglass media with ASHRAE 52.2 MERV rating of 8 or higher, in sheet metal frame.

PART 3 - EXECUTION

3.1 INSTALLATION

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GAS-FIRED FURNACES 235416.13 - 4

A. Install gas-fired furnaces and associated fuel and vent features and systems according to

NFPA 54.

B. Suspended Units: Suspend from structure using threaded rods, spring hangers, and building attachments. Secure rods to unit hanger attachments. Adjust hangers so unit is level and plumb.

C. Base-Mounted Units: Secure units to substrate. Provide optional bottom closure base if required by installation conditions.

D. Wiring Method: Install control wiring in accessible ceiling spaces and in gypsum board partitions where unenclosed wiring method may be used. Conceal control wiring except in unfinished spaces.

3.2 CONNECTIONS

A. Gas piping installation requirements are specified in Section 231126 "Liquified Petroleum-Gas Piping." Drawings indicate general arrangement of piping, fittings, and specialties. Connect gas piping with union or flange and appliance connector valve.

B. Install piping adjacent to equipment to allow service and maintenance.

C. Vent Connection, Noncondensing, Gas-Fired Furnaces: Connect Type B vents to furnace vent connection and extend outdoors. Type B vents and their installation requirements are specified in Section 235123 "Gas Vents."

D. Vent and Outside-Air Connection, Condensing, Gas-Fired Furnaces: Connect plastic piping vent material to furnace connections and extend outdoors. Terminate vent outdoors with a cap and in an arrangement that will protect against entry of birds, insects, and dirt.

1. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.

2. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

3. Plastic Piping Solvent-Cement Joints: Clean and dry joining surfaces. Join pipe and fittings according to the following:

a. Comply with ASTM F 402 for safe-handling practice of cleaners, primers, and solvent cements.

b. CPVC Piping: Join according to ASTM D 2846/D 2846M, Appendix.

c. PVC Pressure Piping: Join schedule number ASTM D 1785 PVC pipe and

PVC socket fittings according to ASTM D 2672. Join other-than-schedule-number PVC pipe and socket fittings according to ASTM D 2855.

d. Requirements for Low-Emitting Materials:

1) CPVC solvent cement shall have a VOC content of 490 g/L or less.

2) PVC solvent cement shall have a VOC content of 510 g/L or less.

3) Adhesive primer shall have a VOC content of 550 g/L or less.

4) Solvent cement and adhesive primer shall comply with the testing and product requirements of the California Department of Public Health's (formerly, the California Department of Health Services') "Standard

GAS-FIRED FURNACES 235416.13 - 5

Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers."

4. Slope pipe vent back to furnace or to outside terminal.

E. Connect ducts to furnace with flexible connector. Comply with requirements in Section 233300 "Air Duct Accessories."

3.3 FIELD QUALITY CONTROL

A. Perform the following tests and inspections:

1. Perform electrical test and visual and mechanical inspection.

2. Leak Test: After installation, charge systems with refrigerant and test for leaks.

Repair leaks, replace lost refrigerant, and retest until no leaks exist.

3. Operational Test: After electrical circuitry has been energized, start units to confirm proper operation, product capability, and compliance with requirements.

4. Verify that fan wheel is rotating in the correct direction and is not vibrating or binding.

5. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

B. Verify that vibration isolation and flexible connections properly dampen vibration transmission to structure.

END OF SECTION 235416.13

MARCH 2020

AIR-COOLED REFRIGERANT CONDENSERS 236313 - 1

VERNAL FIRE CENTER FURNACE AND AC UNIT REPLACEMENT

SECTION 236313 - AIR-COOLED REFRIGERANT CONDENSERS

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes packaged, air-cooled refrigerant condensers for outdoor installation.

1.2 MEASUREMENT & PAYMENT

A. No separate payment will be made for the work included under this section; rather payment shall be considered to be included in the items of work listed in the Schedule of Items.

1.3 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Shop Drawings: For air-cooled refrigerant condensers. Include plans, elevations, sections, details, and attachments to other work.

1. Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

2. Wiring Diagrams: For power, signal, and control wiring.

C. Operation and maintenance data.

1.4 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. ASHRAE/IESNA 90.1 Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section 6 - "Heating, Ventilating, and Air-Conditioning."

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following http://www.specagent.com/Lookup?ulid=3562

AIR-COOLED REFRIGERANT CONDENSERS 236313 - 2

1. Carrier Corporation; a unit of United Technologies Corp.

2. Daikin Applied.

3. Lennox.

4. Trane.

2.2 MANUFACTURED UNITS

A. Description: Factory assembled and tested; consisting of casing, condenser coils, condenser fans and motors, and unit controls.

B. Refrigerant: R-410A.

C. Condenser Coil: Factory tested at 425 psig.

1. Tube: Minimum 3/8-inch- diameter seamless copper. 5/8-inch- diameter seamless copper.

2. Coil Fin: Aluminum.

3. Circuit: To match compressors.

D. Condenser Fans and Drives: Propeller fans with aluminum or galvanized-steel fan blades, for vertical air discharge; directly driven with permanently lubricated ball-bearing motors with integral current- and thermal-overload protection.

1. Weather-proof motors with rain shield and shaft slinger.

2. Extend grease lines to outside of casing.

E. Condenser Fans and Drives: Forward-curved centrifugal fans for vertical air discharge.

1. Fan on steel shaft with self-aligning ball bearings.

2. V-belt drive with minimum of two belts; variable pitch drive pulley.

3. Motor mounted on adjustable slide base.

F. Operating and Safety Controls: Include condenser fan motor thermal and overload cutouts; 115-V control transformer, if required; magnetic contactors for condenser fan motors and a nonfused factory-mounted and -wired disconnect switch for single external electrical power connection.

1. Fan Cycling Control: Head pressure switches.

G. Casings: Galvanized or zinc-coated steel treated and finished with manufacturer's standard paint coating, designed for outdoor installation with weather protection for components and controls, and with the following:

1. Removable panels for access to controls, condenser fans, motors, and drives.

2. Plated -steel fan guards.

3. Lifting eyes.

2.3 CAPACITIES AND CHARACTERISTICS: See Drawings.

2.4 MOTORS

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AIR-COOLED REFRIGERANT CONDENSERS 236313 - 3

A. Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements for motors specified in Section 230513 "Common Motor Requirements for HVAC Equipment."

1. Enclosure Type: Totally enclosed, fan cooled.

2. Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not require motor to operate in service factor range above 1.0.

3. Mount unit-mounted disconnect switches on exterior of unit.

2.5 SOURCE QUALITY CONTROL

A. Testing Requirements: Factory test sound-power-level ratings according to ARI 270.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install units level and plumb, firmly anchored in locations indicated; maintain manufacturer's recommended clearances.

B. Equipment Mounting:

1. Install air-cooled condenser refrigerant condensers on cast-in-place concrete equipment bases. Comply with requirements for equipment bases and foundations specified in Division 03 Sections.

2. Comply with requirements for vibration isolation and seismic control devices specified in Section 230548 "Vibration and Seismic Controls for HVAC."

C. Maintain manufacturer's recommended clearances for service and maintenance.

D. Loose Components: Install electrical components, devices, and accessories that are not factory mounted.

3.2 CONNECTIONS

A. Install piping adjacent to machine to allow service and maintenance.

B. Refrigerant Piping: Connect piping to unit with pressure relief, service valve, filter-dryer, and moisture indicator on each refrigerant-circuit liquid line. Refrigerant piping and specialties are specified in Section 232300 "Refrigerant Piping."

3.3 FIELD QUALITY CONTROL

A. Perform tests and inspections.

B. Tests and Inspections:

1. Perform electrical test and visual and mechanical inspection.

2. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

AIR-COOLED REFRIGERANT CONDENSERS 236313 - 4

3. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.