Specs_2.pdf

Install Heat Pump at Ft. Randall Dam Visitor Center HEATPUMP

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 01 00 CONTRACTOR'S SITE OPERATIONS

01 11 00 SUMMARY OF WORK

01 33 00 SUBMITTAL PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 78 23 OPERATION AND MAINTENANCE DATA

01 78 36.00 24 WARRANTY OF CONSTRUCTION

DIVISION 23 - HEATING, VENTILATING, AND AIR CONDITIONING

23 08 00.00 10 COMMISSIONING OF HVAC SYSTEMS

23 64 26 CHILLED, CHILLED-HOT, AND CONDENSER WATER PIPING SYSTEMS

23 81 47 WATER-LOOP AND GROUND-LOOP HEAT PUMP SYSTEMS

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1

SECTION TABLE OF CONTENTS

DIVISION 23 - HEATING, VENTILATING, AND AIR CONDITIONING

SECTION 23 81 47

WATER-LOOP AND GROUND-LOOP HEAT PUMP SYSTEMS

08/08

PART 1 GENERAL

1.1 REFERENCES

1.2 SYSTEM DESCRIPTION

1.3 SUBMITTALS

1.4 QUALITY ASSURANCE

1.4.1 Material and Equipment Qualifications

1.4.2 Alternative Qualifications

1.4.3 Service Support

1.4.4 Manufacturer's Nameplate

1.4.5 Modification of References

1.4.5.1 Definitions

1.4.5.2 Administrative Interpretations

1.4.6 System Diagrams

1.4.7 Plastic Piping Heat Fusion Requirements

1.5 DELIVERY, STORAGE, AND HANDLING

1.6 SAFETY REQUIREMENTS

1.7 PROJECT/SITE CONDITIONS

1.7.1 Verification of Dimensions

1.7.2 Drawings

1.7.3 Accessibility

1.8 COORDINATION OF WORK AND SYSTEM PERFORMANCE

PART 2 PRODUCTS

2.1 PRODUCT SUSTAINABILITY CRITERIA

2.1.1 Energy Efficient Equipment for Water Source Heat Pump Systems and Ground Source Closed-Loop Heat Pump Systems

2.1.2 Ozone Depleting Substances

2.2 EQUIPMENT

2.2.1 Water-Source Water-to-Air Heat Pumps (WAHP)

2.2.2 Closed Circuit Coolers

2.2.3 Plate Heat Exchangers

2.2.4 Air Handler Furnace

2.2.5 Thermostat

2.2.6 Pumps

2.2.6.1 In-Line Pumps

2.2.6.2 End Suction Water Pumps

2.2.6.3 Pump factory assembled

2.3 ELECTRICAL WORK

2.4 ABOVEGROUND PIPING SYSTEMS

2.5 PIPING ACCESSORIES

2.5.1 Pipe Hangers and Supports

2.5.2 Strainers

2.5.3 Pressure Gages

2.5.4 Pressure/Temperature Test Provisions

SECTION 23 81 47 Page 1

2.5.4.1 Pete's Plug

2.5.4.2 Testing Accessories

2.5.5 Thermometers

2.5.6 Flexible Pipe Connectors

2.5.7 Expansion Tanks

2.5.8 Air Separators

2.5.9 Tracer Wire for Nonmetallic Piping

2.5.10 Building Surface Penetrations

2.5.10.1 Sleeves in Masonry and Concrete

2.5.10.2 Waterproof Penetrations

2.5.10.3 Fire-Rated Penetrations

2.6 HEAT TAPE

2.6.1 Heat Tape Construction

2.6.2 Electrical Accessories

2.7 ACCESS DOORS FOR VALVES

2.8 AUXILIARY DRAIN PAN, DRAIN CONNECTIONS, AND DRAIN LINES

2.9 ANTIFREEZE PROTECTION

2.9.1 Biodegradability

2.9.2 Properties of the heat transfer fluid

2.9.2.1 Flash Point

2.9.2.2 Biological Oxygen Demand (BOD)

2.9.2.3 Freezing Point

2.9.2.4 Toxicity

2.9.2.5 Storage Stability

2.9.3 Quality

2.10 CHEMICAL FEED PROVISIONS

2.10.1 Aboveground Condenser Water Piping System

2.10.2 Chilled/Hot Water Piping System

2.11 PAINTING OF NEW EQUIPMENT

2.12 Bentonite Grout

2.12.1 High Grade Bentonite Grout

2.12.2 Thermally-Enhanced Bentonite Grout

2.12.3 Cementitious Thermally Enhanced Grout

2.13 CONTROLS

PART 3 EXECUTION

3.1 CONSTRUCTION-RELATED SUSTAINABILITY CRITERIA

3.1.1 Indoor Air Quality During Construction

3.2 INSTALLATION

3.2.1 Heat Pump System

3.2.2 Connections to Existing Systems

3.3 ABOVEGROUND PIPING

3.4 Piping at Building Entries

3.5 Polyethylene Piping

3.6 Heat Fusion Process

3.7 Pressurizing

3.8 Pipe Identification

3.9 Threaded Fittings

3.10 FLUSHING AND PURGING GROUND HEAT EXCHANGER

3.11 ADJUSTMENTS

3.12 INSTRUCTING OPERATING PERSONNEL

3.13 FIELD QUALITY CONTROL

3.13.1 Piping Systems Except for Ground Heat Exchanger and Refrigerant

3.13.2 Flow Test of Ground Heat Exchanger Piping

3.13.3 Pressure Test of Ground Heat Exchanger Piping

3.13.3.1 Hydrostatic Test

3.13.4 Refrigerant Piping Pressure Test and Evacuation

3.13.5 Equipment Tests

SECTION 23 81 47 Page 2

3.13.5.1 Field Testing

3.13.5.2 Field Test Plans

3.13.5.3 Field Test Reports

3.13.6 Additional Field Testing

3.13.7 ON-SITE TRAINING

-- End of Section Table of Contents --

SECTION 23 81 47 Page 3

SECTION 23 81 47

WATER-LOOP AND GROUND-LOOP HEAT PUMP SYSTEMS

08/08

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE 62.1 (2010; Errata 2011; INT 3 2012; INT 4 2012; INT 5 2013) Ventilation for Acceptable Indoor Air Quality

ASHRAE FUN IP (2013; Addenda and Corrigendum 2013) Fundamentals Handbook, I-P Edition

ASHRAE Item 90376 (1997) Ground-Source Heat Pumps, Design of Geothermal Systems for Commercial and Institutional Buildings

ASME INTERNATIONAL (ASME)

ASME B31.5 (2013) Refrigeration Piping and Heat Transfer Components

ASME B31.9 (2014) Building Services Piping

ASTM INTERNATIONAL (ASTM)

ASTM A126 (2004; R 2014) Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings

ASTM B62 (2015) Standard Specification for Composition Bronze or Ounce Metal Castings

ASTM D1177 (2012) Freezing Point of Aqueous Engine Coolants

ASTM D2657 (2007) Heat Fusion Joining Polyolefin Pipe and Fittings

ASTM D3892 (1993; R 2009) Packaging/Packing of Plastics

ASTM D92 (2012b) Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester

ASTM F1105 (2009; R 2014) Preparing Aircraft Cleaning Compounds, Liquid-Type, SECTION 23 81 47 Page 4

Temperature-Sensitive, or Solvent-Based, for Storage Stability Testing

ASTM F1290 (1998a; R 2011) Electrofusion Joining Polyolefin Pipe and Fittings

ASTM F402 (2005; R 2012) Safe Handling of Solvent Cements, Primers, and Cleaners Used for Joining Thermoplastic Pipe and Fittings

INTERNATIONAL GROUND SOURCE HEAT PUMP ASSOCIATION (IGSHPA)

IGSHPA 21010 (1991) Grouting Procedures for Ground-Source Heat Pump Systems

IGSHPA 21015 (2000) Grouting for Vertical GHP Systems

IGSHPA 21020 (1988) Closed-Loop/Ground-Source Heat Pump System/Installation Guide

IGSHPA 21030 (2005) Design and Installation Standards

IGSHPA 21060 (1989) Soil and Rock Classification Field Manual

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

ISO 13256-1 (1998) Water-Source Heat Pumps - Testing and Rating for Performance - Part 1:

Water-to-Air and Brine-to-Air Heat Pumps

ISO 13256-2 (1998) Water-Source Heat Pumps - Testing and Rating for Performance - Part 2:

Water-to-Water and Brine-to-Water Heat Pumps

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-58 (1993; Reaffirmed 2010) Pipe Hangers and Supports - Materials, Design and Manufacture, Selection, Application, and Installation

MSS SP-69 (2003; Notice 2012) Pipe Hangers and Supports - Selection and Application (ANSI Approved American National Standard)

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA MG 1 (2014) Motors and Generators

NEMA MG 11 (1977; R 2012) Energy Management Guide for Selection and Use of Single Phase Motors

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014; AMD 1 2013; Errata 1 2013; AMD 2 2013; Errata 2 2013; AMD 3 2014; Errata

SECTION 23 81 47 Page 5

3-4 2014; AMD 4-6 2014) National Electrical Code

NFPA 704 (2012) Standard System for the Identification of the Hazards of Materials for Emergency Response

NSF INTERNATIONAL (NSF)

NSF/ANSI 60 (2014a) Drinking Water Treatment Chemicals

- Health Effects

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1966 (2005) HVAC Duct Construction Standards Metal and Flexible, 3rd Edition

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910 Occupational Safety and Health Standards

UNDERWRITERS LABORATORIES (UL)

UL 10B (2008; Reprint Feb 2015) Fire Tests of Door Assemblies

UL 94 (2013; Reprint Jul 2015) Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances

1.2 SYSTEM DESCRIPTION

Provide new dual stage 5 ton water-loop heat pump system rated at greater than or equal to 8 HSPF and greater than or equal to 15 SEER. Systems must be complete and ready for operation. Systems include heat pump, air handler furnace, system equipment, programmable thermostat, piping, pumps, electrical equipment, and controls. Installation of water-loop heat pump systems including equipment, materials, installation, workmanship, fabrication, assembly, erection, examination, inspection, and testing shall be in accordance with ASME B31.9, ASME B31.5, ASHRAE FUN IP, IGSHPA 21010, IGSHPA 21015, IGSHPA 21020, IGSHPA 21030, IGSHPA 21060, NFPA 70, ASHRAE Item 90376, ISO 13256-2 ISO 13256-1 and ISO 13256-2 as supplemented and modified by this section. Heat pump system shall come with a minimum of a 10 year warranty on the compressor and a minimum of a 5 year warranty on covered componets. Provide water-loop heat pump condenser piping under Section 23 64 26 CHILLED, CHILLED-HOT, AND CONDENSER WATER PIPING SYSTEMS.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

SECTION 23 81 47 Page 6

System Diagrams; G[, [_____]]

Well and Piping System Layout Drawings; G[, [_____]]

SD-03 Product Data

Product data for integral or appurtenant space temperature controls (STC) supplied with the listed equipment shall include shall include point-to-point electrical wiring diagrams for each

STC.

Water-Source Water-to-Air Heat Pumps; G[, [_____]]

[including STC data]

Refrigerants - Provide MSDS Sheets for All Refrigerants

Air Handler Furnace; G[, [_____]]

Pipe, Fittings, and Piping Components; G[, [_____]]

][ Air Separators; G[, [_____]]

U-Bend Assemblies; G[, [_____]]

For the pipe and piping components submittal, include recommendations for the connection of joints, including the preparation of joints for the electrofusion process.

SD-06 Test Reports

Water-Source Water-To-Air Heat Pumps - Field Acceptance Test Plan;

G[, [_____]]

Closed Circuit Coolers - Field Acceptance Test Plan; G[, [_____]]

Water-Source Water-To-Air Heat Pumps - Field Acceptance Test Report;

G[, [_____]]

Closed Circuit Coolers - Field Acceptance Test Report; G[, [_____]]

SD-07 Certificates

Employer's record documents

ARI/ISO Performance Data For Water Source Heat Pumps; G[, [_____]]

System Designer; G[, [_____]]

SD-08 Manufacturer's Instructions

Water-Source Water-To-Air Heat Pumps - Installation Instructions

ON-SITE TRAINING; G[, [_____]]

SECTION 23 81 47 Page 7

SD-10 Operation and Maintenance Data

Water-source water-to-air heat pumps, Data Package 2; ; G[, Closed Circuit Coolers, Data Package 2; ; G[, [_____]] Air Handler Furnace, Data Package 2; ; G[, [_____]]

SD-11 Closeout Submittals

As-Built Drawings; G[, [_____]]

Energy Efficient Equipment for Water Source Heat Pump Systems and Ground Source Closed-loop Heat Pump Systems; S

Ozone Depleting Substances; S

Indoor Air Quality During Construction; S

1.4 QUALITY ASSURANCE

1.4.1 Material and Equipment Qualifications

Provide materials and equipment that are standard products of manufacturers regularly engaged in the manufacture of such products, which are of a similar material, design and workmanship. Standard products shall have been in satisfactory commercial or industrial use for 2 years prior to bid opening. The 2-year use shall include applications of equipment and materials under similar circumstances and of similar size. The product shall have been for sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2 year period.

1.4.2 Alternative Qualifications

Products having less than a two-year field service record will be acceptable if a certified record of satisfactory field operation for not less than 6000 hours, exclusive of the manufacturer's factory or laboratory tests, can be shown.

1.4.3 Service Support

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

1.4.4 Manufacturer's Nameplate

Each item of equipment shall have a nameplate bearing the manufacturer's name, address, model number, and serial number securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable. As applicable the ENERGY STAR label also affixed to the equipment.

1.4.5 Modification of References

In each of the publications referred to herein, consider the advisory

SECTION 23 81 47 Page 8 provisions to be mandatory, as though the word, "shall" had been substituted for "should" wherever it appears. Interpret references in these publications to the "authority having jurisdiction", or words of similar meaning, to mean the Contracting Officer.

1.4.5.1 Definitions

For the International Code Council (ICC) Codes referenced in the contract documents, advisory provisions shall be considered mandatory, the word "should" shall be interpreted as "shall." Reference to the "code official" shall be interpreted to mean the "Contracting Officer." For Navy owned property, references to the "owner" shall be interpreted to mean the "Contracting Officer." For leased facilities, references to the "owner" shall be interpreted to mean the "lessor." References to the "permit holder" shall be interpreted to mean the "Contractor."

1.4.5.2 Administrative Interpretations

For ICC Codes referenced in the contract documents, the provisions of Chapter 1, "Administrator," do not apply. These administrative requirements are covered by the applicable Federal Acquisition Regulations (FAR) included in this contract and by the authority granted to the Officer in Charge of Construction to administer the construction of this project.

References in the ICC Codes to sections of Chapter 1, shall be applied appropriately by the Contracting Officer as authorized by his administrative cognizance and the FAR.

1.4.6 System Diagrams

After completion, but before final acceptance, submit System diagrams that show the layout of equipment, piping, and circulation pumps, and typed condensed operation manuals explaining preventative maintenance procedures, methods of checking the system for normal, safe operation, and procedures for safely starting and stopping the system shall be framed under glass or laminated plastic. After approval, these items shall be posted where directed.

1.4.7 Plastic Piping Heat Fusion Requirements

All plastic pipe shall be cut, made up, and installed in accordance with the pipe manufacturer's recommendations. Heat joining shall be performed in accordance with ASTM D2657. Electrofusion joining shall be performed in accordance with ASTM F1290.

1.5 DELIVERY, STORAGE, AND HANDLING

Materials delivered and placed in storage shall be stored with protection from the weather, excessive humidity variation, excessive temperature variation, dirt, dust and/or other contaminants. Proper protection and care of material before, during and after installation is the Contractor's responsibility. Any material found to be damaged shall be replaced at the Contractor's expense. During installation, piping shall be capped to keep out dirt and other foreign matter. A material safety data sheet in conformance with 29 CFR 1910 Section 1200(g) shall accompany each chemical delivered for use in pipe installation. At a minimum, this includes all solvents, solvent cements, glues and other materials that may contain hazardous compounds. Handling shall be in accordance with ASTM F402.

Storage facilities shall be classified and marked in accordance with

SECTION 23 81 47 Page 9

NFPA 704. Materials shall be stored with protection from puncture, dirt, grease, moisture, mechanical abrasions, excessive heat, ultraviolet (UV) radiation damage, or other damage. Pipe and fittings shall be handled and stored in accordance with the manufacturer's recommendation. Plastic pipe shall be packed, packaged and marked in accordance with ASTM D3892. Upon delivery of piping, fitting, components, and equipment to the site, inspect items for damage and verify items meet project requirements.

1.6 SAFETY REQUIREMENTS

Exposed moving parts, parts that produce high operating temperature, parts which may be electrically energized, and parts that may be a hazard to operating personnel shall be insulated, fully enclosed, guarded, or fitted with other types of safety devices. Safety devices shall be installed so that proper operation of equipment is not impaired.

1.7 PROJECT/SITE CONDITIONS

1.7.1 Verification of Dimensions

The Contractor shall become familiar with all details of the work, verify all dimensions indicated in the field, and advise the Contracting Officer of any discrepancy before performing any work.

1.7.2 Drawings

Because of the small scale of the drawings, it is not possible to indicate all offsets, fittings, and accessories that may be required. The Contractor shall carefully investigate the plumbing, fire protection, electrical, structural and finish conditions that would affect the work to be performed and shall arrange such work accordingly, furnishing required offsets, fittings, and accessories to meet such conditions.

1.7.3 Accessibility

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

1.8 COORDINATION OF WORK AND SYSTEM PERFORMANCE

a. Pump supports, piping offsets, fittings, and any other accessories required shall be furnished as required to provide a complete installation and to eliminate interference with other construction.

b. Submit a Work Coordination and Performance Certificate. Concurrent with submittal of the Detail Drawings and the Calculations, submit a Certificate by [both] the [System Designer] [and the] [Ground Source Heat Pump Installer] stating that the drawings and calculations have been coordinated with all related work and the Ground Source Heat Pump System will perform as [specified] [and indicated].

PART 2 PRODUCTS

2.1 PRODUCT SUSTAINABILITY CRITERIA

For products in this section, where applicable and to extent allowed by performance criteria, provide and document the following:

SECTION 23 81 47 Page 10

2.1.1 Energy Efficient Equipment for Water Source Heat Pump Systems and Ground Source Closed-Loop Heat Pump Systems

Provide water source heat pump systems and ground source closed-loop heat pump systems meeting the efficiency requirements as stated within this section.

2.1.2 Ozone Depleting Substances

Water source heat pump systems and ground source closed-loop heat pump systems must not use CFC-based refrigerants, and must have an Ozone Depletion Potential (ODP) no greater than 0.0, with exception to R-123, in conformance with this section.

2.2 EQUIPMENT

Equipment using CFC-based refrigerants, or refrigerants with ozone depleting potential (ODP) greater than 0.0 will not be permitted.

2.2.1 Water-Source Water-to-Air Heat Pumps (WAHP)

Provide water-source water-to-air heat pump units factory assembled, designed, tested, and rated in accordance with ISO 13256-1. Units shall be ISO 13256-1 certified, or listed in ISO 13256-1 directory. Units shall include fans, refrigerant-to-air heat exchangers, filters, compressor, reversing valve, expansion valve, refrigerant-to-water heat exchangers, hose kits, bypass for flushing and purging, and controls. A permanent label shall be affixed to each heat pump unit indicating basic information for that unit. The information shall include: nominal flow rate gpm, pressure drop feet, temperature drop/rise degree F, and capacity Btu/hr.

Provide certificates of ARI/ISO Performance Data For Water Source Heat Pumps.

a. Cabinet: Provide manufacturer's standard stainless steel cabinet or finished with corrosion resistant epoxy coating or lacquer acrylic.

Provide access panels for inspection and access to internal parts.

Insulate cabinet with minimum 1/2 inch multi-density, fiberglass insulation with exposed edges sealed or tucked under flanges to prevent introduction of fibers into the airstream. Female threaded pipe condensate drain connections, supply water connections, and return water connections shall be copper threaded fittings mechanically fastened to the cabinet. Water piping shall be insulated. Construct cabinet with compartments and locate the compressor, reversing valve, and water coil out of the airstream. Insulate the divider between the compressor and fan sections. The control box shall be located within the unit.

b. Fans: Provide centrifugal type, direct drive fans with permanently lubricated motors. Motors shall be an Electronically Commutated Motor (ECM) microprocessor controlled DC type motor with internal programming factory set for the specific unit and featuring soft start/stop and a delay off feature for maximum efficiency and quiet operation. There will further be provisions for adjusting the air delivery of the motor and blower by plus or minus 15 percent from rated air flow.

c. Refrigerant-to-Air Heat Exchanger: Provide coil constructed of rifled copper tubes with plate aluminum fins designed for refrigerant working pressure of 450 psi. Fins shall be mechanically bonded to tubes. The condensate drain pan shall be epoxy coated and insulated. Provide

SECTION 23 81 47 Page 11 internal traps on vertical units. Provide drain pan with overflow protection. Drain pan shall be corrosion-resistant plastic or galvanized steel or stainless steel.

d. Filter Section: Provide replaceable 2 inch thick UL listed fiberglass or permanent washable type filters with standard dust-holding capacity.

Mount filters in filter frames and provide access panels or doors for removal and replacement of filters.

e. Compressor: Provide hermetically sealed type compressor, installed on vibration isolators enclosed in an acoustically treated enclosure.

Provide high and low pressure switches, low suction temperature cut-out, motor thermal overload protection, 5 minute anti-recycle timer, and start capacitor kit. Provide capability to reset compressor lockout circuit at the remote thermostat and at the disconnect.

Provide units with factory installed sound attenuation package.

f. Reversing Valve: Provide solenoid activated refrigerant reversing valves energized only during the cooling mode and designed to fail in the heating position.

g. Refrigerant-to-Water Heat Exchangers: Provide two-position automatic valve interlocked to shut off water flow when the compressor is off.

Provide refrigerant-to-water heat exchangers of coaxial type (tube-in-tube), with inner cupronickel or copper water tube and outer steel refrigerant tube. The refrigerant side of the heat exchanger shall be tested and rated for 450 psig refrigerant working pressure.

The water side of the heat exchanger shall be tested and rated for 400 psig working pressure. A parallel capillary tube/thermal expansion valve assembly shall provide superheat over the entire liquid temperature range. Refrigerant-to-water heat exchangers and refrigerant piping shall be insulated to prevent condensation on the piping containing low temperature water.

h. Factory-Installed Domestic Hot Water Desuperheater: Provide desuperheater of vented double-wall construction and factory installed within indoor heat pump cabinet. Desuperheater units shall be factory assembled, designed, tested, and rated.

Provide with the desuperheater, factory-installed water pump powered by a sealed magnetic drive motor, water line thermostat, secondary safety thermostat to prevent scalding, internal fuse, internally mounted disconnect switch, outside air thermostat, manual on-off switch, low refrigerant gas temperature limit switch, air bleed port, and refrigerant ports. Units shall be UL listed. Desuperheater units shall be UL listed. Units shall be provided by the [ground source] [water source] closed loop heat pump manufacturer.

Controls: The manual on- off switch shall be a push button type with a cover. An indicating light shall be provided next to the switch to indicate the desuperheater pump energized mode. Provide in the water return to the desuperheater unit, a high water temperature limit with adjustable settings, which de-energizes the desuperheater pump at 140 degree F Also provide low refrigerant gas temperature limit which de-energizes the desuperheater pump and is set to open at 100 degree F

i. Emergency Heater: Provide UL or ETL listed, electric resistance heater with internal fusing integral with heat pump unit; fan shall run until heater cools. Locate downstream of indoor coil. The emergency heater

SECTION 23 81 47 Page 12 coil shall be provided as a supplementary electric heater. The heater shall be provided with a rack, control box with hinged cover, safety limits, and relay. Control voltage of the heater shall be compatible with the heat pump. The electric heater shall be provided by the heat pump manufacturer. The control of the electric heater shall be utilized as second stage heating. The first stage heating shall be normal heat pump operations.

j. Hose Kits: Kits shall include two 2 foot long metal (stainless steel) braided hoses with swivel connectors on one end, an manual flow control valve with test ports, two shutoff ball valves with memory stops (one with test port), blow down ball valve, and Y-strainer. Hoses shall be fire rated to meet UL 94. Hoses shall have a maximum working pressure of 300 psi.

k. Bypass for Purging and Flushing: Provide a bypass around the heat pump unit condenser coil. The bypass includes isolation valves and piping that allows for purging and flushing of the system piping. Provide the necessary flushing pump, hoses, and isolation valves.

l. Hanger Kits: Provide horizontal units with hanger kits consisting of galvanized steel brackets, bolts, washers, and vibration isolators.

The hanger kit shall be designed to support the unit from below and suspend from threaded rods.

m. Controls: Controls and safety devices shall be factory wired and mounted within the control box of the unit cabinet.

(1) Provide a microprocessor based controller that communicates with an electronic multi-stage space thermostat. The microprocessor shall control sequencing, high and low pressure switch monitoring, freeze protection, lockout control, night setback, emergency shutdown, short cycle protection, random start, LED mode and fault indicators, fault memory, input and output diagnostics, and a communications port. Provide a factory-installed low voltage terminal block for field control wiring and a low voltage transformer.

(2) Provide 24 volt electromechanical controls supplied with a low voltage transformer, controls for compressor, reversing valve, and fan motor operation. Controls shall include a random start relay, a night setback relay, a compressor cycling relay for demand load shedding, and a condensate overflow switch. Provide a low voltage terminal block for field control wiring.

(3) The ECM interface board shall include a screw type terminal board for a thermostat connection, LED's to indicate thermostat status and air delivery.

n. Space Temperature Controls: Provide electronic multi-stage, auto-changeover, adjustable thermostats with OFF-HEAT-AUTO-COOL-EMERGENCY system switch and AUTO-ON fan switch.

Thermostats shall be the programmable type and shall be furnished by the unit manufacturer. Thermostats shall have the energy star rating.

Provide seven day schedule capability. Provide with battery back-up.

The thermostat shall have night setback and shall raise the night setback temperature gradually. When in the heating mode, where there is a continued drop in room temperature, the thermostat shall energize the second stage of heating, which would be the emergency heater.

SECTION 23 81 47 Page 13

Provide relays, transformers, contractors, and control wiring between thermostats and unit. Thermostats shall read out in degrees C and degrees F.

2.2.2 Closed Circuit Coolers

a. Fan and Casing: Construct the fan section (up to top of intake louvers) of heavy gage stainless steel and construct casing of hot-dip galvanized steel. Standard pan accessories shall include louver access, overflow, drain, Type 304 stainless steel strainers, and brass make-up valve with plastic float.

b. Axial Propeller Fans: Fans shall be heavy duty axial propeller type statically balanced. Construct fans with aluminum alloy blades, and install in a closed fitted cowl with venturi air inlet.

c. Fan Motors: Motors shall be totally enclosed, ball bearing type, and suitable for outdoor service. Motors 1 Hp and greater shall be the premium efficiency type in accordance with NEMA MG 1. Fan motor speed control shall be provided for motors 7.5 hp or larger.

d. Drive: Fan drive shall be multi-groove, solid V-belt type with taper lock sheaves designed for 150 percent of nameplate HP. Fan and motor sheave shall be aluminum alloy construction. Belt adjustment shall be accomplished from exterior of unit.

e. Heat Transfer Coil: The coil shall be steel, encased in steel framework with the entire assembly hot-dip galvanized after fabrication. Arrange tubes in a self-spacing, staggered pattern in the direction of airflow for maximum heat transfer efficiency and minimum pressure drop, without the use of additional spacers between the coil tubes. Design coil with sloping tubes for free drainage of liquid and test to 350 psi air pressure under water.

f. Water Distribution System: The system shall provide a water flow rate of not less than 6 gpm over each square foot of unit face area to ensure proper flooding of the coil. Construct spray header of Schedule 40 polyvinyl chloride (PVC) pipe for corrosion resistance. Spray branches shall be removable for cleaning. Distribute water over the entire coil surface by spray nozzles( 15 by 5/16 inch orifice) with internal sludge ring to eliminate clogging. Thread nozzles into spray header to provide easy removal for maintenance.

g. Water Recirculation Pump: The pump shall be close-coupled, centrifugal type with mechanical seal, installed vertically at the factory to allow free drainage at shutdown.

h. Eliminators: Construct eliminators of inert PVC in easily handled sections. The eliminator design shall incorporate three changes in air direction to ensure complete removal of entrained moisture from the discharge airstream. Maximum drift rate shall be less than 0.001 percent of the circulating water rate.

i. Construct Louvers From PVC: Mount louvers in removable frames for maintenance access to the pan. Louvers shall have a minimum of two changes in air direction to prevent splash out and block direct sunlight.

j. Finish: Apply corrosion protection system to the outside of galvanized

SECTION 23 81 47 Page 14 surfaces. Construct non-stainless metal components of mill hot-dip galvanized steel. Coat component edges and welds with a 95 percent pure zinc-rich compound. Preparation for coating shall include degreasing, cleaning, and a light surface burnishing. The coating shall be suitable for field repair with the same original coating material applied in the same manner.

k. Electric Pan Heater Package: Electric pan heater package consists of electric immersion heaters, heater thermostat, and low water cutout, all installed in pan. Size heaters to maintain plus 40 degrees F pan water temperature with the fans off at design conditions indicated on drawings. Control the heaters with a thermostat, and provide water cutout to prevent heaters from cycling on unless they are completely submerged. Provide heater contactor and wiring under Section 26 20 00

INTERIOR DISTRIBUTION SYSTEM.

2.2.3 Plate Heat Exchangers

Plates, frames, and gaskets shall be designed for a working pressure of 300 psi and factory tested at 450 psi. Medium temperature water, low temperature water, and pressure relief valve connections shall be located in accordance with the manufacturer's standard practice. Connections larger than 3 inches shall be ASME 300 pound flanged. Plates shall be corrugated Type 316 stainless steel.

2.2.4 Air Handler Furnace

Air handler furnace shall be submitted with product data at the time of bid. The air handler furnace must be compabitable with proposed heat pump system. Air handler furnace system must be at least a 25KW system with a variable speed blower and a manufactures 10 year warrenty. All componets including new heat pump system coils, ducting, controls and any other materials needed for commision of the heat pump system must be provided.

2.2.5 Thermostat

Provide a programable thermostat capable to control the overall system requirements. Thermostat programming must be done by the contractor to the settings as designated by the Government Representative.

2.2.6 Pumps

2.2.6.1 In-Line Pumps

Provide pumps constructed of manufacturer's standard materials suitable for chilled water and hot water heating systems. Pumps shall have mechanical seals and drip-proof electric motors. Motors one Hp and greater shall be the premium efficiency type in accordance with NEMA MG 1.

2.2.6.2 End Suction Water Pumps

Pumps shall be single stage centrifugal, with mechanical seals and drip-proof electric motors. Motors one Hp and greater shall be the premium efficiency type in accordance with NEMA MG 1. Impeller shall be bronze.

Other pump parts shall be manufacturer's standard materials provided with bronze impeller pump. Provide threaded suction and discharge pressure gage tapping with square-head plugs. Provide flexible coupling with steel cover guard on base-mounted pumps. Base-mounted pump, coupling guard, and motor shall each be bolted to a fabricated steel base which shall have bolt holes

SECTION 23 81 47 Page 15 for securing base to supporting surface. Close-coupled pump shall be provided with integrally cast or fabricated steel feet with bolt holes for securing feet to supporting surface.

2.2.6.3 Pump factory assembled

Provide pump module package with all necessary fittings and valves.Provide pump module units factory designed, assembled, and pressure tested. Units shall include flanged pumps, brass fill and purge valves, quick release fill and purge ports, pressure/temperature (Pete's) plug, wiring, and fuse protection. Pumps shall be the wet rotor and single stage types, with pump casings thermally insulated. Provide manufacturer's standard galvanized steel cabinet, finished with corrosion resistant epoxy paint. Pump module units shall be provided by the ground source, closed loop heat pump manufacturer.

2.3 ELECTRICAL WORK

Provide electrical motor driven equipment specified complete with motors, motor starters, and controls. Provide high efficiency type, single-phase, fractional-horsepower alternating-current motors, including motors that are part of a system, in accordance with NEMA MG 11. In addition provide polyphase, squirrel-cage medium induction motors, including motors that are part of a system, that meet the efficiency ratings for premium efficiency motors in accordance with NEMA MG 1. Provide motors in accordance with NEMA MG 1 and of sufficient size to drive the load at the specified capacity without exceeding the nameplate rating of the motor.

Motors shall be rated for continuous duty with the enclosure specified.

Motor duty requirements shall allow for maximum frequency start-stop operation and minimum encountered interval between start and stop. Motor torque shall be capable of accelerating the connected load within 20 seconds with 80 percent of the rated voltage maintained at motor terminals during one starting period.

Motor bearings shall be fitted with grease supply fittings and grease relief to outside of the enclosure.

Manual or automatic control and protective or signal devices required for the operation specified and any control wiring required for controls and devices specified, but not shown, shall be provided. For packaged equipment, the manufacturer shall provide controllers including the required monitors and timed restart.

2.4 ABOVEGROUND PIPING SYSTEMS

Provide above ground piping as specified in Section 23 64 26 CHILLED, CHILLED-HOT, CONDENSER WATER PIPING SYSTEMS.

2.5 PIPING ACCESSORIES

2.5.1 Pipe Hangers and Supports

Provide MSS SP-58 and MSS SP-69. Type 1 with adjustable type steel support rods, except as specified or indicated otherwise. Attach to steel joists with Type 19 or 23 clamps and retaining straps. Attach to Steel W or S beams with Type 21, 28, 29, or 30 clamps. Attach to steel angles and

SECTION 23 81 47 Page 16 vertical web steel channels with Type 20 clamp with beam clamp channel adapter. Attach to horizontal web steel channel and wood with drilled hole on centerline and double nut and washer. Attach to concrete with Type 18 insert or drilled expansion anchor. Provide Type 40 insulation protection shields for insulated piping.

2.5.2 Strainers

ASTM A126, Class B, flanged iron body, for 2.5 inches and larger. ASTM B62, cast iron or bronze for 2 inches and smaller. Provide basket or Y type.

Tee type is acceptable for water service. Provide screens constructed of bronze, monel metal, or 18-8 stainless steel, free area not less than 2.5 times pipe area, with perforations as follows:

a. 3 inches and smaller: 0.045 inches diameter perforations for liquids.

b. 4 inches and larger: 0.125 inches diameter perforations for liquids.

2.5.3 Pressure Gages

Provide single style pressure gage with 4.5 inch dial, brass or aluminum case, bronze tube, gage cock, pressure snubber, and syphon. Provide scale range for intended service. Gages shall have an accuracy of 0.5 percent of the span. Provide gages that have a dial layout with major ticks with numbers every 10pressure units and minor ticks every one pressure unit.

Provide gages with dials showing psi units.

2.5.4 Pressure/Temperature Test Provisions

2.5.4.1 Pete's Plug

Provide 0.5 inch MPT by 3 inches long, brass body and cap, with retained safety cap, nordel self-closing valve cores, permanently installed in piping where shown, or in lieu of pressure gage test connections shown on the drawings.

2.5.4.2 Testing Accessories

Provide one each of the following test items to the Contracting Officer:

a. 0.25 inch FPT by 0.125 inch diameter stainless steel pressure gage adapter probe for extra long test plug.

b. 3.5 inch diameter, one percent accuracy, compound pressure gage, 0 to 200 psi range.

c. minus 20 to 120 degree F pocket thermometer one-half degree accuracy, one inch dial, 5 inch long stainless steel stem, stainless steel wetted materials, and stainless steel external materials.

2.5.5 Thermometers

Provide bi-metal dial type thermometers with stainless steel case, stem, and fixed thread connection; 3 inch diameter dial with glass face gasketed within the case; and accuracy within 2 percent of scale range. Provide scale range for intended service.

SECTION 23 81 47 Page 17

2.5.6 Flexible Pipe Connectors

Provide flexible bronze or stainless steel piping connectors with single braid where indicated. Connectors shall be suitable for the intended service.

2.5.7 Expansion Tanks

Construct of steel for minimum working pressure of 125 psi. Tank shall have polypropylene or butyl lined diaphragm which keeps the air charge separated from the water.

2.5.8 Air Separators

Provide tangential inlet and outlet connections, blowdown connections, and internal perforated stainless steel air collector tube to direct released air to automatic air vent. Construct of steel for minimum working pressure of 125 psi.

2.5.9 Tracer Wire for Nonmetallic Piping

Provide bare copper or aluminum wire not less than 0.10 inch in diameter in sufficient length to be continuous over each separate run of nonmetallic pipe.

2.5.10 Building Surface Penetrations

Except as indicated otherwise, provide pipe sleeves as specified in this section. Provide where piping passes entirely through walls, ceilings, roofs, and floors. Secure sleeves in position and location during construction. Provide sleeves of sufficient length to pass through entire thickness of walls, ceilings, roofs, and floors. Provide one inch minimum clearance between exterior of piping or pipe insulation, and interior of sleeve or core-drilled hole.

Sleeves shall not be installed in structural members except where indicated or approved. Except as indicated otherwise piping sleeves shall comply with requirements specified.

Each sleeve shall extend through its respective wall, floor, or roof, and shall be cut flush with each surface. Sleeves shall be of such size as to provide a minimum of 1/4 inch all-around clearance between bare pipe and sleeves or between jacketed-insulation and sleeves.

2.5.10.1 Sleeves in Masonry and Concrete

Provide steel standard weight or PVC standard weight pipe sleeves. Pipes passing through concrete or masonry wall or concrete floors or roofs shall be provided with pipe sleeves fitted into place at the time of construction.

2.5.10.2 Waterproof Penetrations

Pipes passing through roof or floor waterproofing membrane shall be installed through a 17 ounce copper sleeve, or a 0.032 inch thick aluminum sleeve, each within an integral skirt or flange.

Flashing sleeve shall be suitably formed, and skirt or flange shall extend not less than 8 inches from the pipe and be set over the roof or floor

SECTION 23 81 47 Page 18 membrane in a troweled coating of bituminous cement. The flashing sleeve shall extend up the pipe a minimum of 2 inches above the roof or floor penetration. The annular space between the flashing sleeve and the bare pipe or between the flashing sleeve and the metal-jacket-covered insulation shall be sealed as indicated. Penetrations shall be sealed by either one of the following methods.

a. Waterproofing Clamping Flange: Pipes up to and including 10 inches in diameter passing through roof or floor waterproofing membrane may be installed through a cast iron sleeve with caulking recess, anchor lugs, flashing clamp device, and pressure ring with brass bolts.

Waterproofing membrane shall be clamped into place and sealant shall be placed in the caulking recess.

b. Modular Mechanical Type Sealing Assembly: In lieu of a waterproofing clamping flange, a modular mechanical type sealing assembly may be installed. Seals shall consist of interlocking synthetic rubber links shaped to continuously fill the annular space between the pipe/conduit and sleeve with corrosion protected carbon steel bolts, nuts, and pressure plates. Links shall be loosely assembled with bolts to form a continuous rubber belt around the pipe with a pressure plate under each bolt head and each nut.

After the seal assembly is properly positioned in the sleeve, tightening of the bolt shall cause the rubber sealing elements to expand and provide a watertight seal rubber sealing elements to expand and provide a watertight seal between the pipe/conduit seal between the pipe/conduit and the sleeve. Each seal assembly shall be sized as recommended by the manufacturer to fit the pipe/conduit and sleeve involved. The Contractor electing to use the modular mechanical type seals shall provide sleeves of the proper diameters.

2.5.10.3 Fire-Rated Penetrations

Penetration of fire-rated walls, partitions, and floors shall be sealed.

2.6 HEAT TAPE

Provide UL listed parallel conduction type heat tape, with electrical characteristics indicated, and adjustable thermostat for outdoor aboveground winterized piping. The heat trace system shall meet requirements of the NFPA 70, Section 427. The tape shall not be affected by direct sunlight, ambient temperature, operating temperature, rain, or salt laden atmosphere.

2.6.1 Heat Tape Construction

Provide flexible, parallel circuit construction consisting of a continuous self-limiting resistance, conductive inner core material between two parallel copper bus wires, designed for cut-to-length at the job site and for wrapping around valves and complex fittings. Self-regulation shall prevent overheating and burnouts even where the cable overlaps itself.

a. Provide end seals for ends of circuits. Wire at the ends of circuits are not to be tied together.

b. Provide sufficient cable, as recommended by the manufacturer, to keep the pipe surface at 34 degrees F minimum during winter outdoor design temperature as indicated, but not less than the following:

SECTION 23 81 47 Page 19

(1) 3 inch pipe and smaller with one inch thick insulation, 4 watts/feet.

(2) 4 inch pipe and larger 1.5 inch thick insulation, 8 watts/feet of pipe.

2.6.2 Electrical Accessories

a. Power supply connection fitting and stainless steel mounting brackets.

Provide stainless steel worm gear clamp to fasten bracket to pipe.

b. 0.5 inch wide fiberglass reinforced pressure sensitive cloth tape to fasten cable to pipe at 12 inch intervals.

c. Pipe surface temperature control thermostat shall be cast aluminum, NEMA 4 (watertight) enclosure, 0.5 inch NPT conduit hub, SPST switch rated 20 amperes at 480 volts ac, with capillary and copper bulb sensor. Set thermostat to maintain pipe surface temperature at not less than 34 degrees F.

d. Signs shall be manufacturer's standard (NEC), stamped "ELECTRIC TRACED" located on the insulation jacket at 10 feet intervals along the pipe on alternating sides.

2.7 ACCESS DOORS FOR VALVES

Provide factory fabricated and primed flush face steel access doors including steel door frame equipped with continuous hinges and turn-screw-operated latch. Provide door frame installation in plaster and masonry walls. Provide access door size as indicated. Provide insulated fire rated access doors as indicated. Fire rated doors shall meet UL 10B.

Doors shall be rated for 1-1/2 hours.

2.8 AUXILIARY DRAIN PAN, DRAIN CONNECTIONS, AND DRAIN LINES

Provide galvanized steel auxiliary drain pans under units where indicated.

Provide separate drain lines for the unit drain and auxiliary drain pans.

Drain pans shall be fully and freely draining in compliance with ASHRAE 62.1.

Trap drain pans to ensure complete pan drainage. Provide drain lines full size of drain opening. Traps and piping to drainage disposal points shall conform to Section 22 00 00 PLUMBING, GENERAL PURPOSE.

2.9 ANTIFREEZE PROTECTION

Provide antifreeze fluid in a water based solution which meets local, State, and Federal requirements and is acceptable to heat pump component manufacturers. The antifreeze and water-based heat transfer fluid shall be used in closed-loop ground source heat pump systems for the transfer of energy to provide heating and cooling. The heat transfer fluid shall contain the necessary corrosion inhibitors to protect pipe and equipment from attack by the antifreeze solution utilized. The mixture of antifreeze and corrosion inhibitors in a water based solution is defined as a heat transfer fluid.

2.9.1 Biodegradability

The heat transfer fluid shall not be less than 90 percent biodegradable.

SECTION 23 81 47 Page 20

2.9.2 Properties of the heat transfer fluid

The heat transfer fluid shall conform to the following requirements, and tests shall be performed in accordance with specified test methods on the fluid.

2.9.2.1 Flash Point

The flash point of the heat transfer fluid shall not be lower than 194 degrees F, determined in accordance with ASTM D92.

2.9.2.2 Biological Oxygen Demand (BOD)

For 5 days the BOD, at 50 degrees F, shall not exceed 0.007 ounce oxygen per gram nor be less than 0.0035 ounce oxygen per gram.

2.9.2.3 Freezing Point

The freezing point shall not exceed[ 15 degrees F], determined in accordance with ASTM D1177.

2.9.2.4 Toxicity

The toxicity shall not be less than LD 50 (oral-rats) of 0.175 ounce per kilogram. The NFPA hazardous material rating for health shall not be more than 1 (slight).

2.9.2.5 Storage Stability

The heat transfer fluid, tested in accordance with ASTM F1105, shall neither show separation from exposure to heat or cold nor show an increase in turbidity.

2.9.3 Quality

The heat transfer fluid, shall be homogeneous, uniform in color, and free from skins, lumps, and foreign materials detrimental to usage of the fluid.

2.10 CHEMICAL FEED PROVISIONS

Provide chemical feed provisions as specified in Section 23 64 26 CHILLED, CHILLED-HOT, CONDENSER WATER PIPING SYSTEMS.

2.10.1 Aboveground Condenser Water Piping System

Add borate-nitrite corrosion inhibitors, acceptable to heat pump component manufacturers, to initial fill water for heating and cooling water systems in concentrations of[ 0.5 ounce/gal] of system water if corrosion inhibitors are not contained in freeze protection solution in the ground heat exchanger loop.

2.10.2 Chilled/Hot Water Piping System

Add borate-nitrite corrosion inhibitors, acceptable to heat pump component manufacturers, to initial fill water for heating and cooling water systems in concentrations of[ 0.5 ounce/gal] of system water if corrosion inhibitors are not contained in freeze protection solution in the ground heat exchanger loop.

SECTION 23 81 47 Page 21

]2.11 PAINTING OF NEW EQUIPMENT

New equipment painting shall be factory applied or shop applied. New equipment surfaces constructed of non-ferrous surfaces and materials do not have to be factory or shop painted.

2.12 Bentonite Grout

Provide bentonite grout mixture for pressure grouting and sealing the bore hole of the vertical well. Provide grouting of wells in accordance with IGSHPA 21015. The grout selected shall meet NSF/ANSI 60. The grout shall meet all local and state rules and regulations. The bentonite will be a slurry that will be tremie grouted from the bottom of the boring to the surface in accordance with the IGSHPA installation manual. The contractor will work quickly to assure that there are no air voids forming as a result of the bentonite placing.

2.12.1 High Grade Bentonite Grout

Provide high grade bentonite grout mixture. The grout shall be mixed with potable water. The grout shall be mixed per manufacturer instructions.

The thermoconductivity of the grout shall be 0.43 Btu/hr-ft-F or greater.

The minimum solids content shall be 23 percent. The target grout weight shall be 9.5 lb/gallons to 9.8 lb/gallon.

2.12.2 Thermally-Enhanced Bentonite Grout

Provide thermally enhanced bentonite grout mixture.