A3 MT TABOR HVAC REPLACEMENT_Tech Specs.pdf

GREEN MOUNTIAN NATIONAL FOREST

MT. TABOR CREW QUARTERS

HVAC REPLACEMENT

TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

01100 – SUMMARY OF WORK

01900 – MEASUREMENT AND PAYMENT

024119 – SELECTIVE DEMOLITION

223300 – DOMESTIC WATER HEATER

2311626 – LP GAS PIPING

232300 – REFRIGERANT PIPING

233423 – HVAC POWER VENTILATORS

235416.13 – GAS-FIRED FURNACE

238126– CONDENSING UNIT/HEAT PUMP

260000 – ELECTRICAL WORK

END OF INDEX

Green Mountain NF

SUMMARY OF WORK 01100 - 1

SECTION 01100 - SUMMARY OF WORK

PART 1 – GENERAL

1.1 PROJECT IDENTIFICATION

A. Mt Tabor Crew Quarters HVAC Replacement. Located at 382 Brooklyn Road, Town of Mt.

Tabor, Rutland County, VT.

1.2 SUMMARY OF WORK

A. The project consists of the removal of all four (4) propane furnaces and four (4) A/C condensing units and replacing them with four (4) new propane furnaces and 4 new heat pumps in the Mt. Tabor Crew Quarters on the Manchester District on the Green Mountain National Forest. There are optional bid items included in this contract (replacing the existing hot water heater and four (4) exhaust fans).

1.3 SCOPE OF WORK

A. Base Bid: Furnish all labor, supervision, materials, and incidentals required to accomplish the Summary of Work. This work includes, but is not limited to, selective demolition, removal of existing furnaces and A/C units, installation of new furnaces and heat pump units, new thermostats, and associated HVAC/plumbing/electrical work. Contractor shall be responsible to size all equipment and piping as required by this specification and in accordance with applicable building codes.

1) The existing HVAC ventilation system and ducts are to remain throughout building.

Contractor shall connect new HVAC equipment into existing ventilation system and ducts. Any removal, replacement, or modification of the ventilation system to support the replacement of the furnaces shall be considered incidental to all other work. This includes all modifications or changes to the control system.

B. Optional Bid Items: Furnish all labor, supervision, materials, and incidentals required to accomplish the Summary of Work. This work includes, but is not limited to, removal of the existing propane hot water heater and four (4) exhaust fans, installation of a new heat pump hot water heater and new exhaust fans, and all associated plumbing/electrical/control work.

1.4 PROJECT SCHEDULE

A. Work shall start after May 1st, 2024 and shall be complete by June 28th, 2024.

1.5 MISCELLANEOUS PROVISIONS

A. All work shall be done in compliance with the latest edition of the International Code Council’s family of building codes (IBC, IPC, IMC, IFC, and IFGC).

SUMMARY OF WORK 01100 - 2

B. All equipment shall be installed with in accordance with manufacturer’s instructions and these specifications. Conflicting requirements shall be brought to the attention of the COR for resolution.

C. There will not be an organized site visit inside the office. Offerors and quoters may request a site visit and shall coordinate a date and time with the CO. All Forest Service and local health and safety guideline shall be followed. FAR clause 52.236-3, Site Investigations and Conditions Affecting Work.

D. Work Hours - Work shall be scheduled Monday through Friday, between the hours of 8:00 AM and 4:30 PM. No work is permitted on weekends or on Federal Holidays without written authorization of the COR.

E. The Government will be occupying the site during the construction. Cooperate with the Government's representatives during construction operations to minimize conflicts and facilitate Government usage. Perform the Work in a manner that does not interfere with the Government's operations.

F. All work shall be meet the warranties in this contract and FAR clause 52.246-21, Warranty of Construction.

G. Heat pumps are to be the primary source of heating and the furnace shall be secondary

(above 10⁰ F). When the temperature drops below 10⁰ F then the furnace shall be the primary heating source.

H. The Contractor shall coordinate with Green Mountain Power and Efficiency Vermont to determine if there are any energy efficiency incentives or programs where there are immediate cash back/rebates for the equipment being installed. Immediate cash back/rebates will be shared equally between the Government and Contractor. Any cash back/rebates will be incorporated into the contract by modification by the CO.

1.6 SITE UTILITIES

A. Electrical and sanitation utilities services are available on the site. The Contractor may efficiently use this electrical service for work related to this contract at no charge. Contractor shall provide electric generators or other temporary means where electric service is not readily available.

1.7 CONTRACTOR USE OF PREMISES

A. The COR will conduct a pre-construction survey with the Contractor to review and document the existing project conditions prior to construction.

B. C. The Contractor shall limit use of the premises to the work in areas indicated.

1. Confine operations at the site to areas indicated. Do not disturb portions of the site beyond the areas in which Work is indicated.

2. Repair damage caused by construction operations.

SUMMARY OF WORK 01100 - 3

3. Existing materials and equipment that are removed as part of the construction operations, and that are not reused or salvaged as Government property, shall become the property of the Contractor and shall be promptly removed from the site.

END OF SECTION 01100

MEASUREMENT AND PAYMENT 01900- 1

SECTION 01900 – MEASUREMENT AND PAYMENT

1.1 SCOPE: Applies to method of measurement and basis of payment for work items listed in the Bid Schedule.

1.2 WORK: Furnishing all labor, materials, equipment, and other incidentals necessary to successfully complete the project or any portion of it, and carrying out all duties and obligations imposed by the contract on the Contractor.

1.3 PAYMENT: For each individual item in the Bid Schedule, payment shall be in full compensation for all work related to the particular item in accordance with these specifications, as shown on the drawings and as staked in the field. This includes all required submittals have been received, reviewed and approved.

PART 2 – PAYMENT

2.1 For each individual item in the Bid Schedule.

A. Measurement: Completely in place and functional.

B. Payment: At the contract lump sum price including all materials, labor, equipment, and incidentals necessary to complete the work.

END OF SECTION 01900

SELECTIVE DEMOLITION 024119 - 1

SECTION 024119 - SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1 SECTION REQUIREMENTS

A. Items indicated to be removed and salvaged remain Owner's property. Carefully detach from existing construction, in a manner to prevent damage, and deliver to Owner ready for reuse.

Include fasteners or brackets needed for reattachment elsewhere.

B. Pre-demolition Photographs: Show existing conditions of adjoining construction and site improvements. Submit before Work begins.

C. Owner will occupy portions of building immediately adjacent to selective demolition area.

Conduct selective demolition so Owner's operations will not be disrupted. Coordinate with

COR.

D. It is not expected that hazardous materials will be encountered in the Work. If hazardous materials are encountered, do not disturb; immediately notify COR. Hazardous materials will be removed by Owner under a separate contract.

PART 2 - PRODUCTS

2.1 PEFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with EPA regulations and with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ANSI/ASSE A10.6 and NFPA 241.

PART 3 - EXECUTION

3.1 DEMOLITION

A. Maintain services/systems indicated to remain and protect them against damage during selective demolition operations.

B. Locate, identify, shut off, disconnect, and seal or cap off indicated utility services and mechanical/electrical systems serving areas to be selectively demolished.

C. Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

SELECTIVE DEMOLITION 024119 - 2

D. Protect walls, ceilings, floors, and other existing finish work that are to remain. Erect and maintain dustproof partitions. Cover and protect furniture, furnishings, and equipment that have not been removed.

E. Provide and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain, and to prevent unexpected or uncontrolled movement or collapse of construction being demolished.

F. Provide temporary weather protection to prevent water leakage and damage to structure and interior areas.

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

H. Remove demolition waste materials from Project site and legally dispose of them in an EPA-approved landfill. Do not burn demolished materials.

I. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began.

END OF SECTION 024119

ELECTRIC, DOMESTIC-WATER HEATERS 223300 - 1

SECTION 223300 – DOMESTIC WATER HEATER

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Section includes heat-pump water heater.

1.2 ACTION SUBMITTALS

A. Product Data: For each unit. This includes manufacturer’s instructions and O&M manuals prior to installation.

B. Operation and maintenance data.

1.3 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of electric, domestic-water heaters that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including storage tank and supports.

b. Faulty operation of controls.

c. Deterioration of metals, metal finishes, and other materials beyond normal use.

2. Warranty Periods: From date of Substantial Completion.

a. Compression Tanks: Three years.

PART 2 - PRODUCTS

2.1 COMMERCIAL, ELECTRIC HEAT PUMP, DOMESTIC-WATER HEATERS

A. Commercial, Electric Heat Pump, Storage, Domestic-Water Heaters:

1. AO Smith, Model CAHP-120 Heat Pump Water Heater or Approved Equal

PART 3 - EXECUTION

3.1 DOMESTIC-WATER HEATER INSTALLATION

A. Install in accordance with manufacturer's recommendations in the current water heater location.

1. Maintain manufacturer’s recommended clearances.

2. Arrange unit so controls and devices that require services are accessible.

3. Anchor to concrete floor.

ELECTRIC, DOMESTIC-WATER HEATERS 223300 - 2

4. Connect to existing plumbing lines.

5. Install new electrical lines and breakers as required.

6. Install shutoff valves on domestic-water-supply piping to domestic-water heaters and on domestic-hot-water outlet piping.

7. Install combination temperature-and-pressure relief valves in water piping for electric, domestic-water heaters without storage. Extend commercial-water-heater relief-valve outlet, with drain piping same as domestic-water piping in continuous downward pitch, and discharge by positive air gap onto closest floor drain.

8. Install water-heater drain piping as indirect waste to spill by positive air gap into open drains or over floor drains. Install hose-end drain valves at low points in water piping for electric, domestic-water heaters that do not have tank drains.

3.2 FIELD QUALITY CONTROL

A. Perform the following tests and inspections:

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

2. Operational Test: After electrical circuitry has been energized, start units to confirm proper operation.

3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.Electric Heat Pump, domestic-water heaters will be considered defective if they do not pass tests and inspections. Comply with requirements in Division 01 requirements for retesting and reinspecting requirements and requirements for correcting the Work.

B. Prepare test and inspection reports.

C. DEMONSTRATION

1. Train Owner's maintenance personnel to adjust, operate, and condensing units/heat pumps.

END OF SECTION 223300

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 1

SECTION 231126 - LIQUEFIED-PETROLEUM GAS PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes L.P. gas piping, specialties, and accessories.

1.2 SUBMITTALS

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

1.3 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

B. ANSI Standard: Comply with ANSI Z223.1, "National Fuel Gas Code."

C. FMG Standard: Provide components listed in FMG's "Fire Protection Approval Guide" if specified to be FMG approved.

D. IAS Standard: Provide components listed in IAS's "Directory of A. G. A. and C. G. A Certified Appliances and Accessories" if specified to be IAS listed.

E. UL Standard: Provide components listed in UL's "Gas and Oil Equipment Directory" if specified to be UL listed.

F. NFPA Standard: Comply with NFPA 58, “Liquified Petroleum Gas Code.”

PART 2 - PRODUCTS

2.1 PIPE AND FITTINGS SIZES

A. Gas piping and fittings shall be sized based on equipment manufacture recommendations and National Gas Code requiremetns.

2.2 PERFORMANCE REQUIREMENTS

A. Minimum Operating-Pressure Ratings:

1. Piping and Valves Containing Only Vapor: 125 psig minimum unless otherwise indicated.

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 2

2. Piping Containing Liquid:

a. Piping between Shutoff Valves: 350 psig minimum unless otherwise indicated.

b. Piping Other than Above: 250 psig minimum unless otherwise indicated.

c. Valves and Fittings: 250 psig minimum unless otherwise indicated.

B. Liquefied-Petroleum Gas (LPG) System Pressure within Buildings: One pressure range. [0.5 psig or less.

C. Seismic Performance: Vaporizers and mixers shall withstand the effects of earthquake motions determined according to ASCE/SEI 7.

2.3 PIPES, TUBES, AND FITTINGS

A. Steel Pipe: ASTM A 53/A 53M, black steel, Schedule 40, Type E or S, Grade B.

1. Malleable-Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern.

2. Wrought-Steel Welding Fittings: ASTM A 234/A 234M for butt welding and socket welding.

3. Unions: ASME B16.39, Class 150, malleable iron with brass-to-iron seat, ground joint, and threaded ends.

4. Protective Coating for Underground Piping: Factory-applied, three-layer coating of epoxy, adhesive, and polyethylene (PE).

B. Corrugated, Stainless-Steel Tubing: Comply with ANSI/IAS LC 1: Includes flame-retardant PE coating, copper-alloy threaded ends, and striker plates.

C. Drawn-Temper Copper Tube: ASTM B 88, Type L, water tube, with streamline, wrought-copper fittings, and brazed joints.

1. Brazing Filler Metals: AWS A5.8/A5.8M, with melting point greater than 1000 deg F and not more than 0.05 percent phosphorus.

D. Annealed-Temper Copper Tube: ASTM B 88, Type L, water tube, with streamline, wrought-copper fittings, and [brazed joints] [flare fittings complying with ASME B16.26 and SAE J513].

1. Brazing Filler Metals: AWS A5.8/A5.8M, with melting point greater than 1000 deg F and not more than 0.05 percent phosphorus.

E. PE Pipe: ASTM D 2513, SDR 11.

1. PE Fittings: ASTM D 2683, socket-fusion type or ASTM D 3261, butt-fusion type with dimensions matching PE pipe.

2. PE Transition Fittings: Factory-fabricated fittings with PE pipe complying with ASTM D2513, SDR 11 and steel pipe complying with ASTM A 53/A 53M, black steel, Schedule 40, Type E or S, Grade B.

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 3

2.4 SPECIALTIES

A. Flexible Piping Joints: Stainless-steel bellows with woven, flexible, bronze, wire-reinforcing protective jacket; approved for LPG service. Minimum working pressure of 250 psig and 250 deg F operating temperature.

B. Appliance Flexible Connectors:

1. Indoor, Fixed-Appliance Flexible Connectors: Comply with ANSI Z21.24.

2. Indoor, Movable-Appliance Flexible Connectors: Comply with ANSI Z21.69.

3. Outdoor, Appliance Flexible Connectors: Comply with ANSI Z21.75.

4. Corrugated stainless-steel tubing with polymer coating.

C. Strainers: ASTM A 126, Class B, cast-iron body, Y-pattern, full size of connecting piping, CWP rating of 125 psig. Include [40] [60]-mesh startup strainer, and perforated stainless-steel basket.

D. Weatherproof Vent Cap: Cast- or malleable-iron increaser fitting with corrosion-resistant wire screen, with free area at least equal to cross-sectional area of connecting pipe and threaded-end connection.

E. Detectable Warning Tape: PE film warning tape 6 inches wide and 4 mils thick, continuously inscribed with a description of utility, with metallic core encased in a protective jacket for corrosion protection; colored yellow.

2.5 MANUAL GAS-SHUTOFF VALVES

A. General Requirements for Metallic, Manual Gas-Shutoff Valves for Liquid Service: Comply with ASME B16.33 and UL 842.

1. CWP Rating: 250 psig.

B. General Requirements for Metallic, Manual Gas-Shutoff Valves: Comply with ASME B16.33.

1. CWP Rating: 125 psig.

C. Two-Piece, Full-Port, Bronze Ball Valves with Bronze Trim: MSS SP-110.

1. Body: Bronze, complying with ASTM B 584.

2. Ball: Chrome-plated bronze.

3. Stem: Bronze; blowout proof.

4. Seats: Reinforced TFE; blowout proof.

5. Packing: Threaded body packnut design with adjustable stem packing.

6. CWP Rating: 600 psig.

7. Listing: Valves NPS 1 and smaller shall be listed and labeled by an NRTL acceptable to authorities having jurisdiction.

8. Service: Suitable for natural-gas service with "WOG" indicated on valve body.

D. Bronze Plug Valves: MSS SP-78.

1. Body: Bronze, complying with ASTM B 584.

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 4

2. Plug: Bronze.

3. Operator: Square head or lug type with tamperproof feature where indicated.

4. Pressure Class: 125 psig.

5. Listing: Valves NPS 1 and smaller shall be listed and labeled by an NRTL acceptable to authorities having jurisdiction.

6. Service: Suitable for natural-gas service with "WOG" indicated on valve body.

E. Cast-Iron, Nonlubricated Plug Valves: MSS SP-78.

1. Body: Cast iron, complying with ASTM A 126, Class B.

2. Plug: Bronze or nickel-plated cast iron.

3. Seat: Coated with thermoplastic.

4. Stem Seal: Compatible with natural gas.

5. Operator: Square head or lug type with tamperproof feature where indicated.

6. Pressure Class: 125 psig.

7. Listing: Valves NPS 1and smaller shall be listed and labeled by an NRTL acceptable to authorities having jurisdiction.

8. Service: Suitable for natural-gas service with "WOG" indicated on valve body.

F. PE Ball Valves: Comply with ASME B16.40.

1. CWP Rating: 80 psig.

2. Operating Temperature: Minus 20 to plus 140 deg F.

3. Operator: Nut or flat head for key operation with tamperproof feature where indicated.

G. Valve Boxes: Cast iron, two sections, with base to fit over valve and barrel a minimum of 5 inches in diameter and cover with "GAS" lettering.

2.6 MOTORIZED GAS VALVES

A. Automatic Gas Valves: ANSI Z21.21.

2.7 EARTHQUAKE VALVES

A. Earthquake Valves: ASCE 25: Listed and labeled by an NRTL acceptable to authorities having jurisdiction.

2.8 PRESSURE REGULATORS

A. General Requirements: Single stage and suitable for LPG, steel jacketed, and corrosion resistant. Include elevation compensator.

B. Service-Pressure Regulators: ANSI Z21.80:

1. 100 psig maximum inlet pressure. Factory- or field-installed, stainless-steel screen in vent opening if not connected to vent piping.

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 5

PART 3 - EXECUTION

3.1 OUTDOOR PIPING INSTALLATION

A. Install piping free of sags and bends.

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

C. Install underground, LPG piping buried at least 36 inches below finished grade.

1. If LPG piping is installed less than 36 inches below finished grade, install it in containment conduit.

D. Install underground, PE, LPG piping according to ASTM D 2774.

E. Install shutoff valve, downstream from gas meter, outside building at gas service entrance.

F. Install earthquake valves aboveground, outside buildings according to listing.

G. Install wall penetration system at each service pipe penetration through foundation wall. Make installation watertight.

1. Sleeves:

a. Exterior Wall, Pipe Penetrations: Mechanical sleeve seals installed in steel or cast-iron pipes for wall sleeves.

b. Fire-Barrier Penetrations: Maintain indicated fire rating of walls, partitions, ceilings, and floors at pipe penetrations. Seal pipe penetrations with firestop materials. Comply with requirements for firestopping specified in Section 078446 "Penetration Firestopping."

2. Sleeve-Seal-System Installation:

a. Install sleeve-seal systems in sleeves in exterior concrete walls and slabs-on-grade at service piping entries into building.

b. Select type, size, and number of sealing elements required for piping material and size and for sleeve ID or hole size. Position piping in center of sleeve. Center piping in penetration, assemble sleeve-seal system components, and install in annular space between piping and sleeve. Tighten bolts against pressure plates that cause sealing elements to expand, and make a watertight seal.

H. Install pressure gage downstreamfrom each service regulator.

3.2 INDOOR PIPING INSTALLATION

A. Install piping free of sags and bends.

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

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 6

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

D. Piping Installed Under Buildings: Install piping under the building in containment conduit constructed of steel pipe with welded joints as described in Part 2. Install a vent pipe from containment conduit to outdoors and terminate with a weatherproof vent cap.

E. Install escutcheons at penetrations of interior walls, ceilings, and floors.

F. Fire-Barrier Penetrations: Maintain indicated fire rating of walls, partitions, ceilings, and floors at pipe penetrations. Seal pipe penetrations with firestop materials. Comply with requirements in Section 078413 "Penetration Firestopping."

G. Install LPG piping at uniform slope of 2 percent down toward drip and sediment traps.

H. Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level side down.

I. Connect branch piping from top or side of horizontal piping.

J. Install unions in pipes NPS 2 and smaller, adjacent to each valve, at final connection to each piece of equipment. Unions are not required at flanged connections.

K. Install strainer on inlet of each line-pressure regulator and automatic or electrically operated valve.

L. Install pressure gage downstream from each line regulator.

M. Connect gas piping to equipment and appliances with shutoff valves and unions. Install gas valve upstream from and within 72 inches of each appliance using gas. Install union or flanged connections downstream from valves.

N. Extend relief vent connections for service regulators, line regulators, and overpressure protection devices to the outdoors and terminate with weatherproof vent cap.

O. Do not use LPG piping as grounding electrode.

3.3 PIPING JOINT CONSTRUCTION

A. Threaded Joints: Thread pipe with tapered pipe threads complying with ASME B1.20.1.

B. Welded Joints: Construct joints according to AWS D10.12M/D10.12, using qualified processes and welding operators.

C. Joints in Steel Piping with Protective Coating: Apply joint-cover kits to pipe after joining to cover, seal, and protect joints.

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

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 7

E. Flanged Joints: Install gasket material, size, type, and thickness appropriate for LPG gas service. Install gasket concentrically positioned.

F. Flared Joints: Cut tubing with roll-cutting tool. Flare tube end with tool to result in flare dimensions conforming to SAE J513. Tighten finger tight; then use wrench. Do not overtighten.

G. PE Piping Heat-Fusion Joints: Clean and dry joining surfaces by wiping with clean cloth or paper towels. Join according to ASTM D 2657.

1. Plain-End Pipe and Fittings: Use butt fusion.

2. Plain-End Pipe and Socket Fittings: Use socket fusion.

3.4 VALVE INSTALLATION

A. Install manual gas-shutoff valve for each gas appliance ahead of corrugated stainless-steel tubing, aluminum, or copper connector.

B. Install underground valves with valve boxes.

C. Install regulators and overpressure protection devices with maintenance access space adequate for servicing and testing.

D. Install anode for metallic valves in underground, PE piping.

3.5 OUTDOOR PIPING SCHEDULE

A. Underground, LPG vapor piping shall be the following:

1. PE pipe and fittings joined by heat fusion or mechanical couplings; service-line risers with tracer wire terminated in an accessible location.

B. Aboveground, LPG vapor piping shall be the following:

1. Steel pipe with malleable-iron fittings and threaded joints.

C. Branch Piping in Cast-in-Place Concrete to Single Appliance: Annealed temper with wrought-copper fittings and [brazed] [flared] joints. Install piping embedded in concrete with no joints in concrete.

D. Containment Conduit: Steel pipe with wrought-steel fittings and welded joints. Coat pipe and fittings with protective coating for steel piping.

3.6 INDOOR PIPING SCHEDULE FOR SYSTEM PRESSURES LESS THAN 0.5 PSIG

A. Aboveground, branch piping [NPS 1 (DN 25)] <Insert pipe size> and smaller shall be[ one of] the following:

1. Corrugated stainless-steel tubing with mechanical fittings having socket or threaded ends to match adjacent piping.

LIQUEFIED-PETROLEUM GAS PIPING 231126 - 8

2. Annealed-temper copper tube with wrought-copper fittings and [brazed] [flared] joints.

3. Steel pipe with malleable-iron fittings and threaded joints.

B. Aboveground, distribution piping shall be[ one of] the following:

1. Steel pipe with malleable-iron fittings and threaded joints.

2. Drawn-temper copper tube with wrought-copper fittings and brazed joints.

C. Underground, below building, shall be[ one of] the following:

1. Steel pipe with malleable-iron fittings and threaded joints.

2. Steel pipe with wrought-steel fittings and welded joints.

D. Containment Conduit: Steel with wrought-steel fittings and welded joints. Coat pipe and fittings with protective coating for steel piping.

E. Containment Conduit Vent Piping: Steel pipe with malleable-iron fittings and threaded or wrought-steel fittings with welded joints. Coat underground pipe and fittings with protective coating for steel piping.

3.7 ABOVEGROUND, MANUAL GAS-SHUTOFF VALVE SCHEDULE

A. Aboveground, Liquid Piping:

1. Two-piece, full-port, bronze ball valves with bronze trim.

B. Valves pipe sizes NPS 2 (DN 50) and smaller shall be[ one of] the following:

1. One-piece, bronze ball valve with bronze trim.

2. Two-piece, full-port, bronze ball valves with bronze trim.

3. Bronze plug valve.

C. Valves pipe sizes NPS 2-1/2 (DN 65) and larger shall be[ one of] the following:

1. Two-piece, full-port, bronze ball valves with bronze trim.

2. Bronze plug valve.

3. Cast-iron, nonlubricated plug valve.

D. Valves in branch piping for single appliance shall be[ one of] the following:

1. One-piece, bronze ball valve with bronze trim.

2. Two-piece, full-port, bronze ball valves with bronze trim.

3. Bronze plug valve.

END OF SECTION 231126

REFRIGERANT PIPING 232300 - 1

SECTION 232300 - REFRIGERANT PIPING

PART 1 - GENERAL

1.1 SECTION REQUIREMENTS

A. Submittals:

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

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIRMENTS

A. Line-Test Pressure for Refrigerant R-32 or R-454b:

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.

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

2.2 TUBES AND FITTINGS

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

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

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

D. Brazing Filler Metals: AWS A5.8.

2.3 VALVES AND SPECIALTIES

A. Thermostatic Expansion Valve: Comply with ARI 750.

1. Forged brass or steel body, stainless-steel internal parts, copper tubing filled with refrigerant charge for 40 deg F suction temperature; 700-psig working pressure, and 240 deg F operating temperature.

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

REFRIGERANT PIPING 232300 - 2

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

C. Straight-Type Strainers:

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

D. Moisture/Liquid Indicators:

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

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

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

F. Permanent Filter Dryers: Comply with AHRI 730.

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

G. Mufflers:

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

2.4 REFRIGERANTS

A. R-32 or R-454b

2.5 Pipe Insulation

A. Surface-Burning Characteristics: For insulation and related materials, as determined by testing identical products in accordance with ASTM E84 by a testing agency acceptable to authorities having jurisdiction. Factory label insulation, jacket materials, adhesive, mastic, tapes, and cement material containers with appropriate markings of applicable testing agency.

B. All Insulation Installed Indoors: Flame-spread index of 25 or less, and smoke-developed index of 50 or less.

C. Products do not contain asbestos, lead, mercury, or mercury compounds.

D. Products that come into contact with stainless steel have a leachable chloride content of less than 50 ppm when tested in accordance with ASTM C871.

E. Insulation materials for use on austenitic stainless steel are qualified as acceptable in accordance with ASTM C795.

REFRIGERANT PIPING 232300 - 3

F. Foam insulation materials do not use CFC or HCFC blowing agents in the manufacturing process.

G. Cellular Glass: Inorganic, incombustible, foamed or cellulated glass with annealed, rigid, hermetically sealed cells. Comply with ASTM C552.

H. INDOOR PIPING INSULATION SCHEDULE

1. Refrigerant Suction and Hot-Gas Piping: All Pipe Sizes: Flexible Elastomeric: 2-1/2-inches thick.

2. Refrigerant Liquid Piping: All Pipe Sizes: Flexible Elastomeric: 1 inch thick.

3. Condensate and Equipment Drain Water below 60 Deg F: All Pipe Sizes: Flexible

Elastomeric: 1/2 inch thick.

I. OUTDOOR, ABOVEGROUND PIPING INSULATION SCHEDULE

1. Refrigerant Suction and Hot-Gas Piping: All Pipe Sizes: Insulation is one of the following:

a. Cellular Glass: 2-1/2 inches thick.

b. Flexible Elastomeric: 2-1/2 inches thick.

2. Refrigerant Suction and Hot-Gas Flexible Tubing: All Pipe Sizes: Flexible Elastomeric: 2- 1/2 inches thick.

3. Refrigerant Liquid Piping: All Pipe Sizes: Flexible Elastomeric: 1 inch thick.

J. INDOOR, FIELD-APPLIED JACKET SCHEDULE

1. Install jacket over insulation material. For insulation with factory-applied jacket, install the field-applied jacket over the factory-applied jacket

2. Piping, Concealed: None.

3. Piping, Exposed:

a. None on piping located more than 8 feet above finished floor.

b. PVC : 30 mils thick on piping located less than 8 feet above finished floor.

K. OUTDOOR, FIELD-APPLIED JACKET SCHEDULE

1. Install jacket over insulation material.

2. Piping, Concealed: None.

3. Piping, Exposed: Aluminum Stucco Embossed with Z-Shaped Locking Seam: 0.040 inch thick.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install wall penetration system at each pipe penetration through foundation wall. Make installation watertight.

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

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

D. Insulate suction lines.

REFRIGERANT PIPING 232300 - 4

E. 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.

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

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

H. 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.

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

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

K. Install pipe insulation per manufacturer recommendations.

3.2 PIPING APPLICATIONS FOR REFRIGERANT

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

B. Hot-Gas and Liquid Lines: Copper, Type ACR or Type L , annealed- or drawn-temper tubing and wrought-copper fittings with brazed or soldered joints.

END OF SECTION 232300

HVAC POWER VENTILATORS 233423 - 1

SECTION 233423 – HVAC POWER VENTILATORS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Section includes Inline Ventilators.

1.2 ACTION SUBMITTALS

A. Product Data: For each unit. This includes manufacturer’s instructions and O&M manuals prior to installation.

B. Operation and maintenance data.

PART 2 - PRODUCTS

2.1 INLINE VENTILATORS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following or approved equal:

1. Greenheck Fan Corporation.

2. Loren Cook Company.

3. PennBarry.

B. Housing: Steel, lined with acoustical insulation.

C. Fan Wheel: Centrifugal wheels directly mounted on motor shaft. Fan shrouds, motor, and fan wheel removable for service.

D. Duct Connections: Round or rectangular outlet connection. Rectangular inlet connection.

E. Electrical Requirements: Junction box for electrical connection on housing and receptacle for motor plug-in.

F. Accessories: Isolation: Rubber-in-shear vibration isolators.

G. Motors: Match existing capacity.

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HVAC POWER VENTILATORS 233423 - 2

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install power ventilators in accordance with manufacturer's recommendations.

B. Install level and plumb

C. Connect to existing ducts. Utilize existing electrical and control wires. Modify as necessary.

3.2 FIELD QUALITY CONTROL

A. Perform the following tests and inspections:

1. Test and adjust controls.

B. Prepare test and inspection reports.

C. DEMONSTRATION

1. Train Owner's maintenance personnel to adjust, operate, and maintain fans.

END OF SECTION 233423

GAS-FIRED FURNACES 235416.13 - 1

SECTION 235416.13 - GAS-FIRED FURNACES

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes:

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

2. Air filters.

1.2 SUBMITTALS

A. Product Data: For each type of product. This includes manufacturer’s instructions and O&M manuals prior to installation.

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.

1.3 WARRANTY

A. Special Warranty: Manufacturer's standard form in which 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: 10 years.

b. Integrated Ignition and Blower Control Circuit Board: Five years.

c. Draft-Inducer Motor: Five years.

d. Refrigeration Compressors: 10 years.

e. Evaporator and Condenser Coils: Five years.

PART 2 - PRODUCTS

2.1 ASSEMBLY DESCRIPTION

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.

GAS-FIRED FURNACES 235416.13 - 2

B. General Requirements for Condensing Gas-Fired Furnaces: Factory assembled, piped, wired, and tested; complying with ANSI Z21.47/CSA 2.3, "Gas-Fired Central Furnaces," and with NFPA 54 and NFPA 58.

2.2 GAS-FIRED FURNACES, CONDENSING

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following, or an approved equal:

1. Lennox

2. Trane

3. Mitsubishi

4. Heil

5. Goodman

6. Rheem

7. York

B. Cabinet: Galvanized 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. Fan Motors: See Section 2.2. (L) below.

2. Special Motor Features, Single Speed: Single speed, premium efficiency, and with internal thermal protection and permanent lubrication.

3. Special Motor Features, Multispeed: Multitapped, multispeed with internal thermal protection and permanent lubrication.

4. Special Motor Features, ECM: Electronically controlled motor (ECM) controlled by integrated furnace/blower control.

D. 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.

E. Gas-Burner Safety Controls:

1. Electronic Flame Sensor: Prevents gas valve from opening until pilot flame is proven;

stops gas flow on ignition failure.

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.

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GAS-FIRED FURNACES 235416.13 - 3

F. 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.

G. 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].

H. Accessories:

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

2. CPVC Plastic Vent Materials:

a. CPVC Plastic Pipe: Schedule 40, complying with ASTM F441/F441M.

b. CPVC Plastic Fittings: Schedule 40, complying with ASTM F438, socket type.

c. CPVC Solvent Cement: ASTM F493.

1) Use CPVC solvent cement that has a VOC content of 490 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

2) Use adhesive primer that has a VOC content of 550 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

I. Capacities and Characteristics:

1. Airflow Configuration: Match existing

2. Type of Gas: Propane

3. Fan Motor: Multispeed.

4. Ignition: Electronic pilot ignition.

5. Heat Exchanger: Stainless steel.

6. Venting: Power.

7. Burner Controls: Thermocouple sensor, flame rollout switch, vent safety shutoff sensor, and limit control.

8. Automatic Controls: Solid-state board to delay fan start and shutdown.

9. Configuration: Match existing.

10. Heating Capacity: Match existing.

11. Cooling Capacity: Match existing.

12. Accessories: Fan thermal switch and ventilation-air heat exchanger.

J. Capacities and Characteristics: Match existing

K. System Efficiency: 95% AFUE or greater

L. MOTORS

1. Electric Motors

a. All motors shall conform to applicable NEMA standards.

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

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

GAS-FIRED FURNACES 235416.13 - 4

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

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

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

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

2. Single Phase Motors:

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

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

c. Electrical power requirements as required to operate equipment.

2.3 THERMOSTATS

A. Controls shall comply with requirements in ASHRAE/IES 90.1, Section 6 - "Heating, Ventilating, and Air Conditioning."

B. Solid-State Thermostat: Wall-mounting, programmable, microprocessor-based unit with automatic switching from heating to cooling, preferential rate control, seven-day programmability with minimum of four temperature presets per day, vacation mode, and battery backup protection against power failure for program settings.

C. Control Wiring: Unshielded twisted-pair cabling.

1. No. 24 AWG, 100 ohm, four pair.

2. Cable Jacket Color: Blue.

2.4 AIR FILTERS

A. Disposable Filters: MERV 13

2.5 REFRIGERATION COMPONENTS

A. General Refrigeration Component Requirements:

1. Refrigeration compressor, coils, and specialties shall be designed to operate with

CFC-free refrigerants.

2. Energy Efficiency: Equal to or greater than prescribed by ASHRAE/IESNA 90.1-

2004, "Energy Standard for Buildings except Low-Rise Residential Buildings."

GAS-FIRED FURNACES 235416.13 - 5

B. Refrigerant Coil: Copper tubes mechanically expanded into aluminum fins. Comply with ARI 210/240, "Unitary Air-Conditioning and Air-Source Heat Pump Equipment." Match size with furnace. Include condensate drain pan with accessible drain outlet complying with ASHRAE 62.1-2004.

C. Refrigerant Coil Enclosure: Steel, matching furnace and evaporator coil, with access panel and flanges for integral mounting at or on furnace cabinet and galvanized sheet metal drain pan coated with black asphaltic base paint.

D. Refrigerant Line Kits: Annealed-copper suction and liquid lines factory cleaned, dried, pressurized with nitrogen, sealed, and with suction line insulated. Provide in standard lengths for installation without joints, except at equipment connections.

1. Flexible Elastomeric: Closed-cell, sponge- or expanded-rubber materials. Comply with

ASTM C 534, Type I, 1 inch thick.

E. Refrigerant Piping: Comply with requirements in Section 23 2300 - Refrigerant Piping.

PART 3 - EXECUTION

3.1 INSTALLATION

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

NFPA 54.

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

C. Controls: Install thermostats and humidistats at existing height above floor.

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 PIPING CONNECTIONS

A. Gas piping installation requirements are specified in Section 231126 Facility Liquefied- 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 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.

GAS-FIRED FURNACES 235416.13 - 6

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

a. Comply with ASTM F402 for safe-handling practice of cleaners, primers, and solvent cements.

b. CPVC Piping: Join according to ASTM D2846/D2846M, Appendix.

c. PVC Pressure Piping: Join schedule number ASTM D1785PVC pipe and PVC socket fittings according to ASTM D2672. Join other-than-schedule-number PVC pipe and socket fittings according to ASTM D2855.

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

3.3 DUCTWORK CONNECTIONS

A. Connect ducts to furnace with flexible connector.

3.4 ELECTRICAL CONNECTIONS

A. Electrical connections to be done in accordance with local, state and federal codes and regulations.

3.5 CONTROL CONNECTIONS

A. Install control and electrical power wiring to field-mounted control devices.

3.6 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. Remove and replace malfunctioning units and retest as specified above.

3.7 ADJUSTING

A. Adjust initial temperature and humidity set points.

B. Adjust burner and other unit components for optimum heating performance and efficiency.

GAS-FIRED FURNACES 235416.13 - 7

3.8 DEMONSTRATION

A. Train Owner's maintenance personnel to adjust, operate, and maintain gas-fired unit heaters.

END OF SECTION 235416.13

CONDENSING UNIT/HEAT PUMPS 238126 - 1

SECTION 238126 – CONDENSING UNIT/HEAT PUMPS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Section includes heat-pump units consisting of separate evaporator-fan and compressor-condenser components.

1.2 ACTION SUBMITTALS

A. Product Data: For each compressor and condenser unit. This includes manufacturer’s instructions and O&M manuals prior to installation.

B. Shop Drawings: For compressor and condenser units.

C. Operation and maintenance data.

1.3 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of split-system air-conditioning units that fail in materials or workmanship within specified warranty period.

1. Warranty Period:

a. For Compressor: Extended lifetime limited warranty from date of Substantial Completion.

b. For Parts: 10 year(s) limited warranty from date of Substantial Completion.

c. For Labor: Five year(s) from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Fabricate and label refrigeration system in accordance with ASHRAE 15 and ASHRAE 34.

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

C. 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.

CONDENSING UNIT/HEAT PUMPS 238126 - 2

2.2 OUTDOOR UNIT

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following, or an approved equal:

1. Lennox

2. Trane

3. Mitsubishi

4. Heil

5. Goodman

6. Rheem

7. York

B. Description: Factory assembled and tested; consisting of compressor, condenser coil, fan, motors, refrigerant reservoir, and operating controls.

C. Compressor Type: Scroll, hermetically sealed, with rubber vibration isolators.

1. Motor: Variable speed, and includes thermal- and current-sensitive overload devices, start capacitor, relay, and contactor.

2. Two-Speed Compressor: Include manual-reset, high-pressure switch and automatic-reset, low-pressure switch.

D. Refrigerant: R-32 or R-454b

E.