CEKT062001volume2.doc

Design/Build ECIP Geothermal HVAC Systems

Bradley ANGB

CEKT062001

East Granby, Connecticut

3.1 PROGRAM SUMMARY

Project Summary:

A new closed-loop geothermal heating and cooling HVAC system for Building 22- Squadron Operations. Additional closed-loop geothermal wells for future building renovations will also be included.

Existing Conditions:

Currently Building 22 – Squad Ops is an 18,200 sq.ft., single story building consisting of office, conference and briefing areas. The existing HVAC system which was installed in the early 1980’s consists of one variable volume air handling unit located in the mechanical room. The air handling unit utilizes hot water and chilled water which is produced by a natural gas boiler and a water-cooled chiller with a closed loop cooling tower. The air handler supplies air to zone located cooling-only VAV boxes. Space heat is provided by perimeter mounted hot water fin tube radiators. The boiler also produces HVAC hot water for unit heaters and cabinet unit heaters and also domestic hot water, through a heat exchanger, for sinks and shower facilities. The existing controls are made up of a combination of pneumatic and electronic from a variety of manufactures.

Power is distributed throughout the facility via a 120/208 volt, 3 phase, 4 wire, 800A main switchboard (MSB) located in the mechanical room. The MSB serves wall mounted and equipment mounted starters and disconnects controlling the mechanical equipment.

Program:

The existing HVAC system serving Building 22 – Squad Ops will be completely removed including air handling units, chillers, cooling towers, ductwork, hot water supply/return piping, pumps, fin tube heating elements and cabinets and controls. The natural gas boiler shall remain to provide domestic hot water to the facility.

The new closed-loop geothermal system will include a geothermal well field, condenser water pumping and piping, above the ceiling geothermal heat pumps, air distribution and controls. The existing electrical system shall be modified as required to provide service to the new equipment.

Based on the funding available for this project, any residual money remaining after the Building 22 – Squad Ops is completed shall be use for additional geothermal well infrastructure for future building renovations.

All contract, project and equipment requirements and criteria are located in submittal.

Contractor Responsibility:

The contractor is responsible for the removal of the existing HVAC system(s) in Building 22 – Squad Ops including associated electrical work. The contractor is responsible for the design and installation of a complete and functioning closed-loop geothermal heat pump system and associated electrical work. This includes heating and cooling loads, design drawings, shop drawing review and system testing and balancing. Additional work required of the contractor is all site work and required for the geothermal well field, any an all cutting and patching required and any temporary heating and cooling for Building 22 – Squad Ops as required by the CTANG. See scope of work for project detail.

END OF PROGRAM SUMMARY

3.2 SCOPE OF WORK

Demolition Mechanical:

· Remove central station air handling unit, AHU hot water coils, chilled water coils, fan dampers, valves and controls.

· Remove air cooled chiller, piping, pumps valves and controls.

· Remove closed-loop cooling tower, piping, pumps, fans, valves and controls, exterior louver and roof ventilation hood.

· Hot water boiler, piping, pumps, piping and controls and hot water storage tank shall remain and continue to be used for domestic hot water service.

· Remove all supply and return ductwork, VAV boxes, hot water coils, piping, fin tube radiation, cabinets and all other equipment associated with existing HVAC system. Existing exhaust systems shall remain.

· See Appendix Part 5 for existing HVAC drawings (for reference only).

Electrical:

· Remove all disconnect switches, starters, conduit, and wiring associated with the central station air handling unit, air cooled chiller, and closed-loop cooling tower, and their related pumps, fans, valves, controls, etc.

· Remove all duct smoke detectors mounted on HVAC equipment being removed.

Contractor is responsible for the removal of all mechanical, electrical and building systems required too complete this project. Contractor shall investigate all existing systems before removal to determine function and verify removal. Contractor shall keep all non-project related systems running and in use during project duration. Any system removed by contractor, that was intended to remain, shall be reinstalled or new provided at contractor expense.

New Work Mechanical:

· Provide new closed-loop geothermal well field in proposed area. See Appendix Part 5 for proposed area. Geothermal well field shall be capable of provide at a minimum 50 tons cooling, approximately 25 wells @ 600’ each.

· Provide new exterior underground condenser water supply and return piping.

· Provide new condenser water piping manifold and pumping system as required. Equipment shall be located in existing Building 22 – Squad Ops mechanical room.

· Provide new above the ceiling heat pump equipment for entire Building 22 – Squad Ops.

· Provide new condenser water supply and return piping and condensate drain piping as required.

· Provide new air distribution equipment and material including supply and return ductwork, duct insulation, diffusers, damper and all other accessories required.

· Provide new dedicate outside air. Equipment shall be located in existing Building 22 – Squad Ops mechanical room. Provide new outside air ductwork and insulation to each above ceiling heat pump.

· Provide new DDC controls.

· Provide additional closed loop geothermal wells as budget allows for future HVAC building renovations. Wells shall be drilled and capped.

Electrical:

· The MSB should have adequate capacity to serve the new geothermal system from existing circuit breakers made available during demolition. Contractor shall reuse existing or provide new distribution equipment as required to serve the new geothermal system.

· Provide starters, disconnect switches, conduit and wiring required for operation of condenser water pump(s), heat pumps, and outside air AHU.

· Provide power for DDC control panel.

· Provide new duct mounted smoke detectors as required for new HVAC equipment and connect to existing fire alarm control panel.

Site:

· Provide all site work required to install closed-loop geothermal well field including excavating, drilling, and grading.

· Provide all require asphalt cutting and patching.

· Site shall be returned to before project status after project is completed. This includes grading, soil and grass.

Architectural:

· Repair mechanical room wall in location cooling tower louver was removed to match existing construction.

· Repair mechanical room roof in location roof ventilation hood was removed to match existing construction.

· Repair/Replace suspended ceilings and reflected ceiling tiles as required to install new HVAC system.

· Repair all interior wall in locations fin tube cabinet was removed to match existing conditions.

Contractor shall provide a fully functional close-loop geothermal HVAC system including all mechanical, electrical, site and architectural work as stated but not limited to project scope of work.

END OF PROGRAM SCOPE OF WORK

4.1 FACILITY PERFORMANCE

PERFORMANCE

Basic Function:

1. The construction will provide built elements and site modifications as required to fulfill needs described in the project program.

2.

The complete project comprises the following elements:

a.

Services (D): Mechanical, electrical and utility elements needed for the functioning of the building.

b.

Demolition (F): Removal of unneeded and undesirable existing elements.

c. Sitework (G): Modifications to the site, site improvements, and utilities.

3.

Code: All portions of the project will comply with the code. The code referred to herein consists of all applicable local, State, and federal regulations, including those listed below:

a.

Federal Regulatory Requirements:

(1) Americans with Disabilities Act of 1990, as a public accommodation, as implemented in ADAAG, 1994.

(2) 29 CFR 1910-1997, Occupational Safety and Health Standards, as a work place.

(3) International Building Code IBC 2006, including all references, except as modified herein.

(4) International Mechanical Code IMC 2006, including all references, except as modified herein.

(5) International Plumbing Code IPC 2006, including all references, except as modified herein.

(6) National Electrical Code, 2005 b.

Non-Regulatory Criteria Documents: In addition to specific regulatory requirements, the following documents are also incorporated into the definition of "the code" for the purposes of this project, except for administrative provisions contained therein; where referenced, the role of the code official described in the document will be performed by Government.

(1) UFC 1-200-01 Design: General Building Requirements.

(2) UFC-3-600-01 Design: Fire Protection Engineering for Facilities.

(3) TI 809-04 - Seismic Design for Buildings.

(4) NFPA 54 - National Fuel Gas Code, latest edition.

(5) ASHRAE Standard 62 - Ventilation for Acceptable Indoor Air Quality.

(6) ASHRAE Standard 15 - Safety Code for Mechanical Refrigeration.

(7) NFPA 10 - Portable Fire Extinguishers, latest edition.

(8) NFPA 13 - Sprinkler Systems Installation, latest edition.

(9) NFPA 72 - National Fire Alarm Code, latest edition.

(10) NFPA 90A - Installation of Air Conditioning and Ventilating Systems, latest edition.

(11) ASME A17.1.

(12) ASME A17.3.

(13) ASTM applicable as specified throughout this document.

(14) NEBB Procedural Standards for Testing and Balancing of Heating, Ventilating and Air Conditioning Systems, latest edition.

(15) ASHRAE Guide and Data Handbooks, latest editions.

(16) ASCE 7 Minimum Design Loads for Buildings and Other Structures,2002.

4.

Environmentally Responsible Design: In addition to other requirements, the design and construction will minimize adverse effects on the exterior environment, will enhance the quality of the indoor environment, and will minimize consumption of energy, water, construction materials, and other resources.

a.

Sitework:

(1) Sediment and erosion control: Required.

b.

Energy Conservation:

(1) Maximum energy efficiency: Required.

(2) Energy efficiency exceeding minimum specified: Desirable.

(3) No use of CFC-based refrigerants: Required.

(4) No use of HCFC's or Halon: Desirable.

(5) Heat recovery: Desirable.

d.

Conservation of Materials and Resources:

(1) Recycling and/or salvaging of construction waste: Desirable.

(2) Use of salvaged or refurbished materials: Desirable.

(3) Use of materials containing recycled content: Desirable.

(4) Use of local/regional materials: Desirable.

e.

Indoor Environmental Quality:

(1) Smoking will be prohibited in the building.

(2) Minimum ventilation performance: Required.

(3) Increased ventilation effectiveness: Desirable.

(4) Individual occupant control of lighting systems: Desirable.

(5) Thermal comfort conditions: As specified.

5. In addition to the requirements of this chapter, the construction will comply with requirements of The Program Summary and The Design and Construction Procedures.

Amenity and Comfort:

1.

Thermal Performance: The construction will provide comfortable interior environment in accordance with the code and the following:

a.

Summer Interior Design Conditions:

(1) Daytime Setpoint: Administration/Office Space: 78 °F

Shop Area/Storage: 85 °F (2) Night Setback:

Administration/Office Space: 80 °F b.

Winter Interior Design Conditions:

(1) Daytime Setpoint: Administration/Office Space: 70 °F

(2) Night Setback:

Administration/Office Space: 60 °F

Shop Area/Storage: 50 °F c.

Outside Air Design Conditions:

(1) Summer Outside Air Design Temperature: 89 degrees F dry-bulb; 75 degrees F wet-bulb.

(2) Winter Outside Air Design Temperature: 8 degrees F dry-bulb.

d.

Energy Design Wind Speed: 15 mph

Health and Safety:

1. Prevention of Accidental Injury: As required by code and as follows:

a.

Whenever feasible, the design and selection of materials and systems will implement strategies that minimize hazards to personnel in the event of a terrorist attack, as outlined in UFC 4-010-01.

4.

Health Hazards:

a.

The construction will prevent growth of fungus, mold, and bacteria on surfaces and in concealed spaces.

b.

Indoor Air Quality: The construction will comply with the code and the following:

(1) Acceptable air quality as defined by ANSI/ASHRAE 62-2001.

(2) Substantiation:

(a) Design Development: Identification of methods to be used to comply with requirements; ventilation design calculations. Identification of unusual indoor contaminants or sources and methods to mitigate their effects on occupants.

(b) Construction Documents: Specifications showing that construction materials are not contaminant sources and do not adversely affect air quality.

(c) Field measured outside and supply air quantities for each space and its associated air handler.

(d) Refer Section 01000 for substantiation submission procedures.

5.

Physical Security: In addition to any provisions that may be required by law or code, systems will be designed and constructed to incorporate accepted principles of crime prevention through environmental design (CPTED), using natural (as opposed to technological) methods of providing surveillance, access control, and territorial reinforcement wherever possible. See also the required standards and recommendations in UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Definition of Elements at Ground Level: For purposes of physical security, any element within 20 feet (6 m) of the ground, grade, or adjacent paving.

6. Electrically Operated Equipment and Appliances: UL listed for application or purpose to which they are put; suitable for wet locations listing for exterior use.

Durability:

1.

Expected Service Life Span: Anticipated functional service life of the system portions of this project is 25 years.

a.

Service life spans of individual elements that differ from the overall project life span are defined in other Chapters.

Operation and Maintenance:

1.

Energy Efficiency: The construction will minimize energy consumption while providing function, amenity, and comfort specified.

a.

The construction will be designed to provide energy efficient design using procedures and values specified in ASHRAE 90.1-2001.

b.

Substantiation:

(1) Design Development: Detailed listing of design criteria and design analysis showing compliance with applicable criteria and energy budget and prepared by a licensed mechanical engineer.

(2) Construction Documents: Detailed listing of design criteria and design analysis showing compliance, prepared by a licensed mechanical engineer.

(3) Construction Documents: Energy cost of all energy-consuming equipment and systems over the first year of operation; include analysis of probable change in annual cost over time due to aging but disregarding inflation and rate changes. Document compliance with Energy Budget.

(4) Refer to Section 01000 for substantiation submission procedures.

2.

Water Consumption: The construction will minimize water consumption.

3. Ease of Operation: The construction will provide facility, equipment, and systems that are easily operated by personnel with a reasonable level of training for similar activities.

4. Ease of Maintenance: The construction will minimize the amount of maintenance required. Reference ETL 1-01 Reliability and Maintainability Design Checklist, http://www.afcesa.af.mil/library/index.asp, the Air National Guard Design Policy (ANG ETL 01-1-1).

5. Ease of Repair: Elements that do not meet the specified requirements for ease of repair will be used only if they meet the specified requirements for ease of replacement of elements not required to have service life span equal to that specified for the project as a whole; the service life expectancy analysis and life cycle cost substantiation specified for service life are provided; and Government acceptance has been granted.

6. Ease of Replacement:

a.

Elements Not Required to have the Expected Service Life Span Equal to that Specified for the Project as a Whole: The construction will make provisions for replacement without undue disruption of building operation.

SUBSTANTIATION

Definition: Substantiation is any form of evidence that is used to predict whether the design will comply with the requirements or to verify that the construction based on the design actually does comply. During Preliminary Design, Design Development, and Construction Documents, requirements to submit substantiation are primarily intended to forestall use of designs or constructions that will not comply. At any time before completion of construction, substantiation is presumed to be only a prediction and may subsequently be invalidated by actual results.

1. Regardless of whether substantiation is specified or not, the actual construction will comply with the specified requirements and may, at the Government's discretion, be examined, inspected, or tested to determine compliance.

2. Substantiation submittals will only be approved or accepted where they are required to be approved or accepted in order to proceed to the next stage of design or construction. However, approval or acceptance of substantiation will not constitute approval or acceptance of deviations from the specified requirements unless those deviations are specifically identified as such on the submittal.

3. The Government accepts the responsibility to review substantiation submittals in a timely manner and to respond if they are unacceptable. Refer to Section 01000 for substantiation submission procedures.

In addition to the requirements stated in other chapters, provide the following substantiation of compliance at each stage of the project:

1. If a substantiation requirement is specified without an indication of when it is to be submitted, submit it before the end of Construction Documents.

2. See also the Agreement and Conditions of the Contract for submittal requirements.

Design Analyses (including Engineering Calculations):

1. Where a design analysis or calculation is specified without identifying a particular method, analysis will be performed in accordance with accepted engineering or scientific principles to show compliance with specified requirements, with report that includes analysis methods used and the name and qualifications of the designer.

2. Where engineering design is allowed to be completed after commencement of construction, substantiation may be in the form of shop drawings or other data.

3. Design analyses will be submitted at the end of Design Development unless otherwise indicated.

4.

Where design analysis is specified to be performed by licensed design professional.

END OF FACILITY PERFORMANCE

CHAPTER D

SERVICES

PERFORMANCE

Basic Function:

1.

The construction will provide the following services:

a. HVAC (D3): Artificial means of maintaining interior space comfort and air quality, including heating, cooling, ventilation, and energy supply.

b. Electrical Power (D5): Energy to operate all electrically operated devices, including those included under other services and those provided separately by the Government.

c. Other Services (D9): Services that include energy monitoring & control systems (EMCS) 2.

Utility Sources and Outlets:

a. Water Source: Existing public utility.

b. Electrical Power Source: Existing public utility.

3. Where services elements must also function as elements defined within another element group, the construction will meet the requirements of both element groups.

a.

Where services elements are located outside the building in the site area, the construction will meet applicable requirements of Chapters G3, G31, G32, G33 and G34.

4.

In addition to the requirements of this chapter, the construction will comply with all applicable requirements of Part 4.1 - Facility Performance, Air National Guard Design Policy (ANG ETL 01-1-1), UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings. See Appendix Part 6 & 7 for documents.

Amenity and Comfort:

1.

Equipment Producing By-Product Heat: The construction will provide ventilation for housings and cabinets as required by equipment manufacturer and rooms and spaces as required to maintain specified environmental conditions.

2.

Moisture: The construction will prevent condensation from forming on service elements.

3.

Airborne Sound:

a.

The construction will maintain the sound transmission characteristics of assemblies through which services must pass; comply with requirements of chapter where penetrated assembly is specified.

b.

Prohibited Plumbing Noises: All sounds of flushing and of liquid running through pipes are prohibited outside of the rooms housing mechanical equipment, pumps, piping, ect. with the exception of when doors to those rooms are open.

c.

Equipment Noises: Noise level below that which will be objectionable, based on occupancy of spaces.

d.

When services are located within assemblies that perform sound isolation functions, consider the noise produced by the service itself as one of the external sound sources.

4. Cleanliness: The construction will prevent accumulation of debris and dirt at floor mounted equipment, such as air handlers, chillers, pumps, switchgear, and panel boards by one or more of the following methods.

a. The construction will provide 4-inch (100 mm) thick, concrete housekeeping pads.

5.

Odors: The construction will eliminate, isolate, or exhaust odors produced by occupant functions and building services.

6.

Appearance:

a.

The construction will conceal services elements from view to greatest extent possible, with exposed portions of simple, neutral design and color.

(1) Exception: Standard designs of manufacturers, without consideration for appearance, may be used for fire suppression sprinkler heads.

b.

Annular spaces around pipes, ducts, and conduits, where they pass through walls, ceilings, and floors will be covered with escutcheons or cover plates.

c.

Mountings: On finished surfaces, concealed attachments will be used, with cover plates, frames, or trim overlapping finishes.

Health and Safety:

1.

Fire Safety:

a.

Combustible pipes will be used only where buried if outside building.

b.

Substantiation for Combustible Materials, Where Allowed: UL listed or labeled, with flame spread and smoke developed ratings printed on product.

c.

The construction will provide products that are fire rated for the specific locations where they are installed.

2.

Safety Hazards: The construction will avoid creating safety hazards wherever possible; where services must involve flammable materials or hazardous operations, the construction will comply with code.

3.

Excess Pressure: Pressurized components will be designed to withstand operational pressures without failure and to relieve or reduce excessive pressure to prevent failure.

4.

Misuse: The construction will minimize misuse that could result in damage to property, injury, or loss of life.

5.

Electric Shock: The construction will provide equipment that protects personnel from electrical shock.

6.

Toxic Materials:

a.

Lead: The construction will not use lead or lead-containing materials in potable water systems.

7.

Vermin Resistance: The construction will provide components that are resistant to the entry of rodents and insects.

Structure:

1.

Supports for Piping, Conduit, Ducts, and Components: Attached to, and supported by, the superstructure, not to or by non-structural construction or sheet metal elements, so that they do not move or sag, using the following:

a.

Supports that allow movement of the rigid linear elements (pipe, etc.) without undue stress on the piping, tubes, fittings, components, or the superstructure.

b.

Intermediate supports mounted between structural members to limit distance between supports.

c.

Supports capable of handling seismic forces in accordance with the code.

d.

Mounting frames, bases, or pads, designed for ease of anchorage or mounting.

e.

Rigid sway bracing at changes in direction of more than one-half of a right angle, for all pipes.

f.

Substantiation:

(1) Design Development: Details of supports, including engineering analysis.

2.

Structural Design of Components and Their Supports: In accordance with code and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

3.

Concealed or Buried Components: The construction will arrange cover or concealment so that components are not subjected to damaging stresses due to applied loads.

Durability:

1.

Expected Service Life Span: Same as the service life of the building, except as follows:

a.

Ducts, Piping, and Wiring in All Services: 25 years.

b.

HVAC:

(1) Shut-Off Valves: 15 years.

(2) Dampers, Louvers, Registers, Grilles: 25 years.

(3) Main Heat Generation and Cooling Equipment: 20 years.

(4) Secondary Equipment: 15 years.

(5) Control Components, Except Wiring: 15 years.

c.

Electrical:

(1) Power Distribution Equipment: 25 years (2) Control Components, Except Wiring: 15 years.

d.

Energy Monitoring & Controls: 15 years.

2.

Condensation: The construction will provide insulated drain pans and piping to remove condensation from cooling coils.

3.

Moisture Resistance: Where components are mounted to surfaces that are required to be moisture-resistant, mounting surface of components will be sealed to finish surface so that moisture cannot penetrate under or behind component, using material that is not affected by presence of water, that is mildew-growth resistant, and that has a minimum service life of 10 years.

4.

Temperature and Humidity Endurance: Equipment will be designed to endure temperature and humidity that will be encountered and to resist damage due to thermal expansion and contraction.

5.

Corrosion Resistance: Corrosion will be prevented by using corrosion-resistant materials, by preventing galvanic action, by preventing contact between metals and concrete and masonry, and by preventing condensation on metals.

a.

Metals Considered Corrosion-Resistant: Aluminum, stainless steel, brass, bronze, cast iron, ductile iron, malleable iron, hot-dipped galvanized steel, chrome-plated steel, cadmium-plated steel, and steel coated with high-build epoxy or coal tar-based paint.

b.

Piping Connections for Piping of Dissimilar Metals: Dielectric adapters.

c.

Underground Elements: The construction will provide supplementary protection for underground metal pipes, ducts, conduits, and tanks, sufficient to prevent corrosion completely, for the service life of the element without maintenance.

(1) Three (3) inches (75 mm) of concrete cover is considered to be permanent protection.

(2) Bituminous or other waterproof coating or wrapping is considered permanent protection unless cathodic protection is required and unless underground element is subject to movement due to structural loads or thermal expansion or contraction.

6.

Accidental Water Leakage: The construction will locate components that would be damaged by water leakage from pipes or through foundations or roof out of likely paths of water and at least 4 inches (100 mm) above floor level.

7.

Abuse Resistance:

a.

Buried Components: Minimum of 12 inches below surface of ground.

b.

Underground Piping and Conduit: Watertight and rootproof.

c.

The construction will provide equipment that has been designed to prevent tampering.

8.

Accidental Damage: The construction will protect equipment and piping from accidental damage.

9.

Underground Piping Accidental Damage: Protect HVAC piping from accidental damage with a warning tape buried 12 inches above the pipe.

Operation and Maintenance:

1.

Capacity:

a.

Heating, Cooling, and Ventilating: Maintain interior environment within ranges specified in 4.1 Facility Performance.

b.

Electrical: As required by code and as specified in Chapter D5.

c.

Telecommunications: As specified in Chapters D7, D71 and D72.

2.

Efficiency:

a.

Energy efficiency as specified Chapter D3

3.

Ease of Use:

a.

Access: All mechanical and electrical equipment located to allow easy access. The construction will provide access doors for equipment accessed through walls, partitions, or fixed ceilings.

b.

Valves and Other Control Devices: Accessible handles, switches, control buttons; valve handles on top/upper side; chain or other remote operators where located out of normal reach above floor level.

c.

Space Around Components: Working clearances and access routes as required by code and as recommended by component manufacturer.

d.

Testing: After completion of installation, services will be prepared for starting-up by testing appropriately for proper operation.

e.

Preparation for Operation: Assistance will be provided for the Government's preparations for operation, as specified as follows:

(1) Demonstration of all services to Government personnel.

(2) Training Government personnel in the operation of all service systems.

(3) Substantiation:

(a) Construction Documents: Schedule of demonstrations.

(b) Construction Documents: Training plan and schedule. Training to be provided by a manufacturer certified trainer.

(c) Construction and Closeout: Documentation of training conducted.

4.

Ease of Cleaning: Where not otherwise specified, equipment mountings will be designed to allow easy cleaning around, and under, equipment, if applicable, without crevices, cracks, and concealed spaces where dirt and grease can accumulate and with raised, closed bases for equipment mounted on the floor.

a.

The construction will provide equipment with removable access panels to allow cleaning.

5.

Ease of Maintenance and Repair:

a.

Piping Other Than Gravity Drains: The construction will provide means of isolating convenient portions of piping system, so that small portions may be shut down leaving the remainder in operation and so that drainage of the entire system is not required to enable repair of a portion of it.

b.

Piping: Entire systems drainable without disassembly of piping.

c.

Above Ground Piping: Labeled to identify contents and direction of flow, each shut-off valve, each piece of equipment, each branch take off, and at 20 ft (6 m) maximum spacing on exposed straight pipe runs.

d.

Equipment in Piping Systems: Each unit provided with a union or flanged connector at each pipe connection to allow easy removal.

6.

Ease of Equipment Service: As specified in Part 4 and the following:

a.

Lighting: Adequate for locating and operating equipment; emergency lighting for critical components.

b.

The construction will not locate any equipment requiring maintenance on the roof, in attics, in crawl spaces, where access must be through attics or crawl spaces, or where access is not possible using removable panels or doors.

c.

Parts Having Service Life Less Than That Specified for Element: Easily replaceable, without de-installation or de-mounting of the entire element, component, or equipment item.

d.

Valves:

Easily replaceable internal parts, eliminating necessity of removal of entire valve for repair.

e.

Parts: Readily available from stocking distributors within 100 miles (160 km) of project location.

f.

Substantiation:

(1) Construction Documents: Identification of parts normally replaced during routine maintenance and parts replaced only when damaged or unexpectedly worn out; location of stocking distributors.

7.

Maintenance Service: Comply with manufacturers requirements for clearance needed for maintenance access to equipment.

8.

Ease of Equipment Removal: The construction will provide doors and corridors large enough for removal of major pieces of equipment, such as, chillers, boilers, fans, coils and water heaters.

a.

Substantiation:

(1) Preliminary Design: Identify locations of major pieces of equipment.

(2) Design: Submit the measurements of the major pieces of equipment and the path for removal from the building. Verify doors and corridors provide adequate clearance for removal of equipment.

(3) Construction Documents: Indicate sizes of doors and corridors used for removal of equipment. Indicate equipment sizes.

END OF CHAPTER D

CHAPTER D3

HVAC - HEATING, VENTILATING AND AIR CONDITIONING

PERFORMANCE

Basic Function:

1. The construction will provide artificial means of controlling temperature, relative humidity, velocity, and direction of air motion in the interior spaces enclosed by the shell, and will reduce airborne odors, particulates and contaminant gases.

2. The HVAC system consists of the following elements:

a.

Energy Supply (D31): Elements that provide energy used to maintain building comfort.

b.

Heat Generation (D32): Elements required to heat building to maintain space comfort.

c.

Refrigeration (D33): Elements necessary to generate the cooling required to maintain building comfort.

d.

Air Distribution (D34): Elements required to distribute air to maintain building comfort.

e.

Hydronic Distribution (D35): Elements required to distribute chilled water and heating water to maintain building comfort.

f.

HVAC Controls (D36): Elements required to control equipment that maintains building comfort.

3. Where HVAC elements also must function as elements defined within another element group, the construction will meet the requirements of both element groups.

4. The HVAC design must meet the requirements of ASHRAE 90.1.

5. In addition to the requirements of this chapter, the construction will comply with all applicable requirements , Air National Guard Design Policy (ANG ETL 01-1-1) and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Amenity and Comfort:

1. Space Temperature Setpoint: as specified in Part 4.1.

2. Relative Humidity Range: as specified in Part 4.1.

3. Substantiation:

a.

Closeout: Measurement of temperature and humidity in each space.

(1) Perform testing and balancing procedures on each system according to the procedures contained in ABC (Associated Air Balance Council) national standard.

(2) HVAC systems shall be initialed balanced to insure equipment is operating and functioning correctly.

(3) Seasonal Periods: If initial testing, adjusting, and balancing procedures were not performed during near-peak summer and winter conditions, additional inspections, testing, and adjusting during near-peak summer and winter conditions shall be preformed. Both summer and winter reports shall be submitted to CE.

Health and Safety:

1.

Electrical Shock Prevention:

a.

The construction will provide a means of disconnecting power at each piece of equipment.

2.

Refrigerants:

a.

The construction will comply with the requirements of ASHRAE 15-1994.

b.

The construction will prevent release of refrigerant to atmosphere.

c.

The construction will prevent exposure of occupants to hazardous refrigerants.

3.

Indoor Air Quality: The design and construction will provide sufficient ventilation to obtain acceptable indoor quality, determined using the Ventilation Rate Procedure of ANSI/ASHRAE 62-2001.

a.

Substantiation:

(1) Design Development: Engineering analysis.

Operation and Maintenance:

1.

Terminal units shall be fully and easily accessible, placed in common areas or hallways to reduce disruption during maintenance.

Design and Equipment Parameters:

1.

Design Criteria:

a.

Entering Condenser Water Temperature (heating): 55 degrees F.

b.

Leaving Condenser Water Temperature (heating): 45 degrees F.

c.

Entering Condenser Water Temperature (cooling): 55 degrees F.

d.

Leaving Condenser Water Temperature (cooling): 65 degrees F e.

Cooling Leaving Air Temperature: 55 degrees F.

f.

Heating Leaving Air Temperature: 105 degrees F.

2.

HVAC Reliability:

a.

Geothermal Heat Pumps: The construction shall provide geothermal heat pumps with a maximum cooling capacity of 1-ton per well.

b.

Pumps: The construction will provide multiple pumps to deliver design flow requirements.

(1) For two (2) Pumps: Each will be sized at 100 percent of design flow.

(2) The construction will provide a stand-by pump for each pumping system.

c.

Fans: The construction shall select fans for use required with specific regards to static pressure, air flow and motor horsepower required. Fans shall be sized at 100% design flow.

d. Substantiation:

(1) Preliminary Design: Identification of design strategies to minimize HVAC disturbances.

(2) Design Documents: Identification of equipment that requires redundancy.

(3) Construction: Functional performance testing.

(4) Occupancy:

(a) If equipment is damaged or malfunctions within one year after completion, reporting of the cause of equipment damage or malfunctions.

(b) Corrective Action: The construction will be modified to provide corrective measures necessary to eliminate equipment damage and malfunctions.

(c) Corrective Action Report: Identification of corrective measures implemented to protect HVAC equipment. Verify that HVAC equipment is operating properly and without damage.

END OF CHAPTER D3

CHAPTER D31

ENERGY SUPPLY

PERFORMANCE

Basic Function:

1. The construction will provide geothermal, electricity or other energy sources for HVAC equipment in accordance with code.

2. The construction will comply with IMC 2006.

3. Substantiation:

a.

Preliminary Design: Identification of each piece of equipment requiring fuel.

b.

Design Development: Distribution system and equipment connections shown on drawings.

c.

Construction: Functional performance testing; proper fuel supply, combustion, and venting.

4. Where energy supply elements also must function as elements defined within another element group, the construction will meet the requirements of both element groups.

5. In addition to the requirements of this chapter, the construction will comply with all applicable requirements of Part 4.1 - Facility Performance, Chapter D - Services, Chapter D3 HVAC, Air National Guard Design Policy (ANG ETL 01-1-1) and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Amenity and Comfort:

1. Heating: The construction will provide closed-loop geothermal equipment that is used to maintain space comfort.

2. Leakage:

a. The construction will provide leak-free distribution systems.

Structural:

1. Seismic Protection:

a.

The construction will provide fuel distribution system with the ability to flex where differential movement is anticipated.

b.

The construction will provide fuel distribution system supports capable of supporting twice its installed weight.

Durability:

1. Expected Service Life Span (Per ASHRAE HVAC Applications Handbook)

Cooling Towers

20 years

Hot Water Modulating Boiler

25 years

Heat Exchangers – shell & tube

24 years

Heat Pumps

19 years

Geothermal Wells

50 years

Heat Recovery Units – Air to Air

11 years

Fans – Centrifugal

25 years

Fans – Propeller

15 years

Pumps – Base Mounted

20 years

Pumps – Inline

10 years

Diffusers

27 years

2. Vandalism: The construction will protect the service meter from unauthorized access.

3. Accidental Damage: Protect service meter from accidental damage by installing bollards to stop vehicles.

Operation and Maintenance:

1. Ease of Use:

a. The construction will locate fuel piping system mains in dedicated piping chases.

2.

Ease of Service:

a. The construction will provide shut-off valves as required by code.

END OF CHAPTER D31

CHAPTER D32

HEAT GENERATION

PERFORMANCE

Basic Function:

1. The construction will provide the necessary equipment and infrastructure to deliver heat to the conditioned spaces.

2. Where HVAC elements also must function as elements defined within another element group, the construction will meet the requirements of both element groups.

3. In addition to the requirements of this chapter, the construction will comply with all applicable requirements of Part 4.1 - Facility and Performance, Chapter D - Services, Chapter D3 HVAC, Air National Guard Design Policy (ANG ETL 01-1-1) and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Health and Safety:

1.

Hazards: The construction will provide geothermal heat pumps which safeguard people, property and equipment from the following potential hazards:

a. Exposure to hot surfaces.

Durability:

1. Temperature Endurance: The construction will provide equipment designed for ambient temperatures ranging from -1 degrees F to 120 degrees F.

2.

Ground Source Heat Pumps:

a.

Coefficient Of Performance (COP): 4.4 (minimum) 3.

Energy Recovery:

a.

Consider the use of energy recovery equipment to precondition outside air for both sensible and latent applications. The minimum effectiveness of an air to air energy recovery device shall be 0.5.

Operation and Maintenance:

Ease of Use: The construction will provide access to and working clearances around heating equipment as recommended by the manufacturer.

END OF CHAPTER D32

CHAPTER D33

REFRIGERATION

PERFORMANCE

Basic Function:

1. The construction will provide the necessary equipment to generate the cooling required to maintain building comfort.

2. Refrigeration elements comprise of geothermal heat pumps and auxiliary equipment.

3. Where refrigeration elements also must function as elements defined within another element group, the construction will meet the requirements of both element groups.

4. In addition to the requirements of this chapter, the construction will comply with all applicable requirements of Part 4.1 - Facility Performance, Chapter D - Services, Chapter D3 Heating, Ventilating, and Air Conditioning (HVAC), Air National Guard Design Policy (ANG ETL 01-1-1) and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Health and Safety:

1. Geothermal Heat pump units will be constructed to ASHRAE 15-1994, Safety Code for Mechanical Refrigeration.

2. Chiller pressure vessels will comply with ASME Boiler and Pressure Vessel Code, Section VIII, Pressure Vessels, 1998, including both coolers and condensers.

Durability:

1.

Temperature Endurance: The construction will provide equipment designed for temperatures ranging from 10 degrees F to 122 degrees F.

Operation and Maintenance:

1.

Energy Efficiency (All efficiencies listed below are minimum):

a. Ground Source Heat Pumps: Energy Efficiency Ration (EER): 22.0 (minimum) b Substantiation:

(1) Design Development: Manufacturer data showing efficiency available.

(2) Construction: Manufacturer's data showing performance, certified by independent testing agency.

END OF CHAPTER D33

CHAPTER D34

AIR DISTRIBUTION

PERFORMANCE

Basic Function:

1. The construction will provide for distribution of air to maintain the required space conditions.

2. Where air distribution elements also must function as elements defined within another element group, the construction will meet the requirements of both element groups.

3. In addition to the requirements of this chapter, the construction will comply with all applicable requirements of Part 4.1 - Facility Performance, Chapter D - Services, Chapter D3 - HVAC, Chapter D36 - HVAC Controls, Air National Guard Design Policy (ANG ETL 01-1-1) and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Amenity and Comfort:

1.

Space Temperature Control: Coordination of air distribution system's design and installation with zoning and space temperature requirements specified in Chapter D36 - HVAC Controls.

a.

The construction will maintain summer and winter effective temperature as defined by ANSI/ASHRAE Std 55-1992 with Addendum.

b.

Vertical Air Temperature Difference: Comply with requirements of ANSI/ASHRAE Std 55-1992 with Addendum.

(1) Substantiation:

(a) Measure dry-bulb temperature as specified in ANSI/ASHRAE Std 55-1992 with Addendum.

2.

Air Movement:

a.

The construction will provide an air distribution system that limits the air velocity to 50 fpm

(0.25 m/s), maximum.

b.

Adjustments: The construction will provide an air distribution system which allows relocating supply diffusers, adjusting direction of airflow from supply diffusers, adjusting dampers, and changing the thermostat setpoint.

c.

Substantiation:

(1) Occupancy: Measure air movement at work station in accordance with ANSI/ASHRAE Standard 55-1992 with Addendum in areas where more than 10 percent of the occupants are uncomfortable and adjust air distribution system to make occupants comfortable.

3.

Acoustical Performance:

a.

Air Distribution Background Noise: The construction will provide systems that comply with the acoustical requirements of ASHRAE.

b. The construction will provide equipment with sound ratings that comply with testing and rating requirements of ARI 880-1998.

(1) Substantiation:

(a) Design Development: Equipment acoustical performance data.

(b) Construction: Tested and rated air terminals.

4.

Cleanliness: The construction will provide filtration of the air distributed to the occupied spaces.

a.

Filter Efficiency: 85 percent arrestance per ASHRAE Standard 52.1-1992.

b.

Filter Efficiency: 25 percent atmospheric dust-spot efficiency per ASHRAE Standard 52.1-1992.

Health and Safety:

1. Fire Sources: The construction will provide air distribution elements constructed from incombustible materials.

2. Fire Spread: The construction will provide interlocks to prevent operation or start-up of air distribution elements when fire or smoke detection systems are in alarm condition.

Durability:

1. Expected Service Life Span: The construction will provide a system that will last a minimum of 10 years in service without major repairs or operating expense.

2. Aesthetic Life Span: The construction will provide units exposed within the occupied space that will not fade, chip, or peal for a minimum of 10 years.

Operation and Maintenance:

1.

Operating Parameters:

a.

Propeller Fans: The construction will not use propeller fans at static pressure above 1 inch water gage (250 Pa).

b.

Duct Construction: In accordance with SMACNA HVAC Duct Construction Standards -1995 with Addendum No. 1, based on the following:

(1) All Ducts Pressure Class: 2 inches w.g.

(2) Duct Seal Class B for Duct Pressure Classes 3 inches w.g., 2 inches w.g.

(3) Substantiation:

(a) Design Development: Identification of ducts to be tested; all duct systems.

(1) Allowable Leakage Rate: Definition of leakage rates for each system to be tested.

(a) Duct Pressure Class 1" and Duct Seal Class B; Leakage Rate: 6.0 cfm per 100 square feet.

c.

Air Velocity: 1500 feet per minute, maximum.

d.

Fans: Fan pressure characteristics will be matched to the air distribution system pressure characteristics including the system effect factors; pressure characteristics based on ANSI/AMCA Standard 210-1999 fan ratings and system characteristics based on engineering calculations.

(1) Substantiation:

(a) Preliminary Design: Identification of the type of fan to be used.

(b) Design: Calculations showing the air distribution pressure characteristics and data supporting the selection of the fan.

(c) Construction: Calculations showing the air distribution systems pressure characteristics; AMCA seal and ratings on each fan used.

2.

Ease of Use: The construction will provide units with individual controls coordinated with controls specified in Chapter D36.

3.

Ease of Cleaning: The construction will provide units with removable access panels to allow cleaning.

4.

Ease of Maintenance: The construction will provide units that are modular in design.

END OF CHAPTER D34

CHAPTER D35

HYDRONIC DISTRIBUTION

PERFORMANCE

Basic Function:

1. The construction will provide for distribution of condenser water to maintain the required space conditions.

2. System(s) required include geothermal condenser water supply and return.

3. Where hydronic elements also must function as elements defined within another element group, the construction will meet the requirements of both element groups.

4. Provide identification wrap and direction of water flow on exterior of all hydronic piping

5. In addition to the requirements of this chapter, the construction will comply with all applicable requirements of Part 4.1 - Facility Performance, Chapter D - Services, Chapter D3 HVAC, Air National Guard Design Policy (ANG ETL 01-1-1) and UFC 4-010-01 Department of Defense Minimum Antiterrorism Standards for Buildings.

Amenity and Comfort:

1.

Space Temperature Control: Coordination of HVAC distribution system's design and installation with zoning and space temperature requirements.

Health and Safety:

1. Accidental Explosion: The construction will provide pressure relief valves to prevent over pressurizing the systems.

2. Fire Source: The construction will provide distribution elements constructed from incombustible materials.

Durability:

1. Expected Service Life Span: The construction will provide a condenser water system which will last a minimum of 20 years in service without major repairs or operating expense.

2. Pressure Ratings: The construction will provide heat pump components with pressure ratings of 450 psig and which exceed the pressure rating of the system in which they are installed.

3. Erosion Control: The construction will provide a means of removing air from condenser water distribution systems to prevent erosion. The construction will configure systems in a manner to prevent cavitation.

4. Corrosion Control: The design will provide for drainage of condensate from cooling coils to prevent corrosion of associated equipment.

5. Underground Piping Corrosion Control: Wrap buried piping in a sealed bituminous jacket.

6. Provide tracer wire and identification tape above all underground piping.

7. Pipe Stress and Strain Control: The design will provide pipe loops, bends, expansion joints, and flexible pipe connectors to reduce stress and strain due to expansion and contraction.

Operation and Maintenance:

1.

Operating Parameters:

a. Condenser Water:

(1) System Pressure: 125 psig.

(2) Distribution Temperature: 55 degrees F.

b. Building Systems:

(1) Water Velocity: 5 feet per second, maximum.

c. Pumps:

The design will match pump pressure and flow characteristics with the pressure and flow characteristics of the distribution system.

(1) Substantiation:

(a) Preliminary Design: Identification of the type of pump to be used.

(b) Design Development: Calculations showing the hydronic distribution water flow and pressure requirements and pump data supporting pump selection.

(c) Construction: Calculations showing the hydronic system pressure requirements; manufacturer's pump curve for each pump used.

Hydronic Balancing Requirements:

1.

Prepare test reports with pertinent design data and number in sequence starting at pump to end of system. Check the sum of branch-circuit flows against approved pump flow rate.