LOG OPS 1512_6_ESR_D30_R2.pdf

Design-Build Request for Proposal RTA Hurricane Florence Recovery Training and Storage Facilities 3 March 202028 April 2020 Marine Corps Base Camp Lejeune, North Carolina Rev 01

01 June 2020 Rev 02

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 1

D30 HVAC – P1512F LOG OPS SCHOOL

SYSTEM DESCRIPTION

Provide the following type of high performance system:

Provide a variable air volume (VAV) system with shut-off terminal units and hot water heating coils. The VAV AHU will feature a chilled water-cooling coil and a hot water preheating coil.

Ventilation air will be provided via the VAV AHU(s). Provide a total enthalpy fixed plate heat exchanger energy recovery section in the VAV AHU. Chilled water will be generated by an air-cooled chiller, and hot water will be generated by condensing gas boiler[s]. Size the AHU coils, chillers, and boilers for full capacity, in the event of a heat recovery system failure.

The primary air from the VAV AHU will be ducted to the terminal units by medium-pressure galvanized metal ductwork. Supply air from the terminal unit to the zone and return air from the zone to the AHU will be ducted by low-pressure galvanized metal ductwork.

Provide dedicated outdoor air AHUs (DOAS) with fixed plate energy recovery to serve the vehicle maintenance labs.

Roof mounted equipment is not permitted.

MOST RELEVANT CODES AND STANDARDS

Refer to Part 3, Chapter 1.

GENERAL SYSTEM REQUIREMENTS

Provide working space around all equipment. Provide all required fittings, connections, and accessories required for a complete and usable system. Install all equipment in accordance with the criteria in Performance Technical Specification Section D30 and the manufacturer's recommendations. Where the word "should" or “must” is used in manufacturer’s instructions, substitute the word "must."

Economizer cycles must not be used.

The new facilities must not use rooftop heating, ventilation, and air conditioning (HVAC) equipment. All major HVAC equipment must be located in mechanical rooms. Consider attic and above-ceiling placement of AHU equipment only when absolutely necessary. Stairs are required for any above-ceiling or attic located air-handling equipment (excluding VAV terminals). Attic space may be used for mechanical equipment if there is a 6-foot-wide stairway with double doors for maintenance purposes. Equipment with cooling coils placed above ceilings must have secondary drain pans with approved gravity drainage piping.

Provide corrosion protection for ALL exterior HVAC equipment, including air-handling units (AHUs), heat exchanger coil surfaces, equipment casings, air-cooled water chiller coils, heat pumps, and air conditioning units that are exposed to the weather. Corrosion protection is also required on HVAC equipment within buildings that are subject to the outside weather conditions.

Specifically, equipment requiring protection is defined as the first HVAC equipment (unit coils) met by the outside air in the supply air ductwork system. The corrosion protection must meet or exceed the requirements of a 3000-hour salt spray test in accordance with ASTM International (ASTM) B117. The specified capacities on the plans and specifications must be the capacities

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 2 after the required corrosion protection coatings are applied. Specify manufacturer's standard off-the-shelf anti-corrosion options for "coastal" or "sea coast" installations that meet or exceed the requirements stated above.

Provide radiant barriers in the exterior wall system. Optimize the building envelope and window requirements to exceed ASHRAE 90.1-2013.

Provide premium-efficiency motors, chillers, and boilers, and optimize the HVAC system.

Provide Seal Class A on all ducts to reduce duct losses. Increase thermal insulation on mechanical systems and use radiant barriers to reduce thermal losses.

Provide chemical shot feeders, air separators, and bladder type expansion tanks for hydronic systems. Provide inline centrifugal pumps with inlet suction diffusers, isolation valves, discharge check valves, balancing valves, drain valves, differential pressure gauges, and flexible pipe connectors and coupling guards.

Single-phase fractional horsepower alternating current motors must be high-efficiency types corresponding to the applications listed in National Electrical Manufacturers Association (NEMA) Motors and Generators (MG) 11. Select polyphase motors based on high-efficiency characteristics relative to the applications listed in NEMA MG 10. Additionally, all polyphase squirrel-cage medium-induction motors with continuous ratings must meet or exceed energy-efficient ratings per Table 2-10 of NEMA MG 1. Provide controllers for three-phase motors rated 1 horsepower (hp) and above with phase voltage monitors designed to protect motors from phase loss and over-/under-voltage. All motors 1 hp and larger must be premium efficiency.

Provide the means to prevent automatic restart by a time-adjustable restart relay. For packaged equipment, the manufacturer must provide controllers including the required monitors and timed restart. Provide reduced-voltage starters for all motors 25 hp and larger.

Provide minimum 4-inch (100 mm) thick concrete housekeeping pads and vibration isolators under all floor-mounted equipment.

Provide factory painted finishes that are designed for 3000-hour duration test for outside equipment and for equipment bringing in outside air.

Provide a manufacturer approved coating system for coastal environments on mechanical equipment, cooling, heating, and condenser coils on units with more than 5 tons of cooling capacity. The submittals must indicate heat transfer rating of coated coils.

The facility must have a complete air and water balanced HVAC system. Calculations must be provided and show the air and water systems are balanced. Drawings must also show balanced air and water systems.

Provide air conditioning and heating for spaces as indicated and for the following Design conditions:

Outside Conditions

Summer

91 Degrees F dry bulb

Winter

26 Degrees F

79 Degrees F wet

Dehumidification140 Grains/lb

Inside Conditions – Occupied Areas including vehicle maintenance labs

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 3

Summer

78 Degrees F dry

Winter

68 Degrees F

50 %RH

Heating and Ventilating Conditions – Electrical Rooms, Mech Rooms with Heat producing equipment (Boilers, Water Heaters, etc)

Summer 10 Degrees F dry bulb above ambient

Winter 55 Degrees F

Inside Conditions – Cold Mechanical Rooms (AHUs and pumps)

Summer N/A Degrees F dry bulb

Winter 55 Degrees F

55 Degrees F Dew Point

Inside Conditions – Communication and IT Rooms

Summer 78 Degrees F dry bulb

Winter NA Degrees F

55 Degrees F Dew Point

Provide Ventilation rates and systems per ASHRAE Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality. Provide carbon dioxide (CO2) sensors to limit CO2 concentration to 800 parts per million (ppm) in spaces with 25 or more occupants per 1,000 square feet (SF).

Provide carbon monoxide (CO) sensors with audible and visual alarms if CO concentration is greater than 25 ppm in areas where internal combustion engines will be operating.

Noise levels must comply with the requirements in the latest edition of the ASHRAE Applications Handbook. The design must provide noise level control by requiring maximum noise levels as well as noise separation areas for the Mechanical Rooms. The drawings must specify the maximum equipment noise level. Classrooms must not be adjacent to mechanical rooms

Mechanical room(s) and electrical room(s) with heat producing equipment must each be a separate zone, heated and ventilated only. Mechanical rooms with combustion units (boilers, water heaters, and similar) must be provided supply fans instead of exhaust fans as required in

UFC 3-410-01

Cold mechanical rooms(s) (AHU’s, chilled water pumps) must each be a separate zone, heated and dehumidified.

Provide a separate zone for IT closets, telecom rooms and server rooms. These zones shall be served by dedicated DX split system equipment.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 4

The HVAC system must provide each zone with the choice of heating or cooling year-round unless otherwise indicated. Provide each zone with its own thermostatic range of control.

Zone the HVAC system as follows:

Administrative spaces such administrative areas, offices, shops, maintenance control, quality assurance, ready rooms, conference rooms, flight equipment, training rooms, tool rooms, restrooms, lockers, elevator lobbies, break rooms, corridors, and project rooms must be zoned separately, such that each administrative space greater than 175 square feet (SF) is its own zone, and any spaces less than 175 SF must be grouped into a single zone.

• Corridors must not be on separate zones. Locate thermostats for corridors in separate occupied spaces.

• Provide a separate zone for the boiler room, heated and ventilated only. Mechanical rooms with combustion units (boilers, water heaters, and similar) must be provided supply fans instead of exhaust fans as required in UFC 3-410-01.

• Provide a separate zone for occupied spaces.

• Provide a separate zone for the boiler room, heated and ventilated only.

• Provide a separate zone for the chilled water pump/AHU room, heated and dehumidified only, no ventilation.

• Provide a separate zone for IT closets, telecom rooms and server rooms.

• Provide a separate zone for electrical rooms.

• Provide a separate zone for Vehicle Labs. Interlock DOAS with vehicle exhaust system.

• Provide a separate zone for Vehicle Dyno rooms.

• Provide a separate zone for Battery/Hazmat rooms.

• Provide a separate zone for the Fuel Lab.

For unoccupied mode, provide the following night setback temperatures:

• For winter, 10 degrees F lower than indoor heating design conditions, but no lower than 55 degrees F.

• For summer, 5 degrees F higher than indoor cooling design conditions, but no higher than 85 degrees F.

• Year round, 60 percent RH maximum.

Provide thermostats and temperature sensors with occupant adjustment control of +/- 3 degrees F.

Provide a manufacturer approved coating system for coastal environments on mechanical equipment, cooling, heating, and condenser coils on units with more than 5 tons of cooling capacity. The submittals must indicate heat transfer rating of coated coils.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 5

D3010 ENERGY SUPPLY

D301001 OIL SUPPLY SYSTEM

NOT USED

D301002 GAS SUPPLY SYSTEM

Provide a natural gas supply system for the heating of the facility. Natural gas must be the energy source (at a supply pressure of 5 inches water column [w.c.] minimum to 7 inches w.c.

maximum) for all building heating systems. Provide a complete natural gas supply system as detailed in the specification in accordance with National Fire Protection Association (NFPA) 54, the North Carolina Building Code, the North Carolina Mechanical Code, and natural gas supplier requirements. Size natural gas piping to carry 15% more flow than is required by heating loads.

Obtain natural gas pressures from the local gas company, Piedmont Natural Gas (PNG). The Contractor is responsible for coordinating with PNG and the Contracting Officer regarding the natural gas requirements for each facility. Provide a complete natural gas system, including any applications and permits. PNG will provide the natural gas to within 5 feet of each facility.

D301003 STEAM SUPPLY SYSTEM (FROM CENTRAL PLANT)

NOT USED

D301004 HOT WATER SUPPLY SYSTEM

NOT USED

D301005 SOLAR ENERGY SUPPLY SYSTEMS

NOT USED

D3020 HEAT GENERATING SYSTEMS

Provide a heating system for this facility consisting of at least two boilers. Each boiler must be no greater than 399,000 Btu/hr. For loads less than 399,000 Btu/hr provide two boilers with 100% redundancy. For loads greater than 399,000 Btu/hr and two boilers are needed based on size limitations, each boiler must supply no less than 65% of the heating load. Where more than two boilers are required to meet size limitations, size each boiler for 1/N of the total load, where “N” is the total number of boilers. On multiple boiler installations with the largest boiler off line, the remaining boiler(s) must be capable of carrying not less than 65% of the maximum winter design load. The boiler fuel train must be compatible to match the available source at the project site. Use the building block load to size the heating plant.

Refer to Part 3, Chapter 2, Paragraph 2.3.9 Air Quality Management, for air emission permit information. Air Emission permit is required for each combustion device provided.

All combustion sources are subject to the NC Air Toxics Permitting requirements.

D302001 BOILERS

Provide packaged gas-fired condensing type boilers. Provide minimum 90% efficiency boilers with stainless steel heat exchangers. All heating equipment boilers must have the ENERGYSTAR label. Provide a stainless steel, multi-wall insulated boiler stack. The stack must be pre-engineered and pre-manufactured, Underwriters Laboratory (UL) listed, and must meet

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 6

NFPA 211. Fuel for boilers must be natural gas. Provide boiler(s) with a condensate neutralization tank/kit.

All vents on gas control valves must be routed outdoors as required by NFPA 54. All gas lines serving gas-fired equipment must be fitted with UL or Factory Mutual approved gas trains suitable for the gas being provided.

D302002 FURNACES

NOT USED

D302003 FUEL-FIRED UNIT HEATERS

NOT USED

D302004 AUXILIARY EQUIPMENT

NOT USED

D302005 EQUIPMENT THERMAL INSULATION

Provide all hot water equipment with cellular glass insulation with vapor barrier jacket or molded fiberglass with vapor barrier jacket.

D3030 COOLING GENERATING SYSTEMS

D303001 CHILLED WATER SYSTEMS

HVAC refrigeration and air conditioning compressors must have full 5-year warranties including all parts and labor from the time of Beneficial Occupancy

HVAC refrigeration and air conditioning compressors must have full 5-year warranties including all parts and labor from the time of Beneficial Occupancy

Provide high-efficiency air-cooled chillers. Where space allows, evaporators are preferred to be Shell and Tube type due to water issues local to MCB Camp Lejeune. Evaporators must be provided with factory-installed electric freeze protection.

Provide constant primary/variable secondary pumping systems on single chiller systems greater than 60 tons and on multiple chiller systems. Primary pumping may be used only on single chiller systems less than 60 tons. Keep flow through the chiller constant; do not use variable primary flow. A buffer tank must be provided on all systems to provide thermal inertia. Provide multiple chillers for loads greater than 160 tons with each chiller sized for 50% of the total facility cooling load.

Provide rotary screw or scroll air cooled chillers. Scroll compressors are preferred for chillers smaller than 100 tons. Screw compressors are preferred for chillers larger than 100 tons.

For unique facilities that exhibit widely variable occupant loading, multiple dissimilar sized chillers must be provided as appropriate for the low occupancy condition and fully occupied condition and must be piped to a common header. For air-cooled scroll compressors, if low load levels are required the chiller is to include hot gas bypass to allow unit operation to 10% of full load to prevent compressors from staging on and off.

The chillers must be located in an exterior equipment yard area and properly spaced from each other and other equipment away from building perimeter. The air-cooled chiller(s) must be

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 7 located outside on a 6-inch thick reinforced concrete housekeeping pad. Provide heat tape to ensure freeze protection as low as 10°F on chilled water piping and any other associated appurtenances. Refer to the MCB Camp Lejeune mechanical policy for the requirements for phase and voltage protection requirements for chillers.

Provide emergency chiller connections consisting of isolation valves and blind flanges. Provide blind flanges with butterfly isolation valves at the chiller location for emergency portable chiller connection. Coordinate site plan design to accommodate access needed for an 18- wheeler flat bed to park near the flange location.

Low ambient capability must be provided to allow chillers to operate in temperatures as low as 15°F.

All coils must have the approved coatings that pass a salt-spray test conducted per ASTM B117 for duration of at least 6,000 hours and provide a minimum of loss of heat transfer due to the thickness of the coating.

Coil coating must be a flexible epoxy polymer e-coating uniformly covering the coil. Coating must meet 5B rating for Cross Hatch Adhesion according to ASTM D3359-97. Coils must include a top coat to prevent UV degradation of the e-coating film. Top coating must have a dry film thickness from 120 to 170µm. Field coated coils will not be accepted.

All coils must be constructed of compatible metals such that galvanic corrosion does not occur.

Chillers must utilize thermal dispersion type flow switches. Paddle type flow switches will not be accepted.

Chillers must include phase loss with under/over voltage protection with LED indication of the fault type.

Chillers must have a centrally located weatherproof control panel to include a DDC microprocessor controller. The control box must be designed in accordance with NEMA 3R SS rating. Controllers and screens must be located within the panel and not exposed to sunlight.

Provide chiller controls with BACnet communication protocol.

Chillers must be equipped with louvered coil guards, top and bottom. Condenser fans must have sound attenuating boxes or columns as needed to reduce sound pressure levels to 85 dBA or less with a reference pressure of 20 micropascals in accordance with AHRI 575.

Provide the approved quantity, size, spacing, material, and height of bollards around all yard equipment.

Provide insulation and vapor barriers on all chilled water equipment. Use polyisocyanurate with Aluminum cover.

Provide complete system flushing and start-up for the entire chilled water system including piping.

Provide air vents at all terminal equipment and system high points, drains at terminal equipment and system low points, and provide chemical treatment equipment for chilled water piping system.

Chillers must include “Y” type strainers.

Startup must include operational testing of chiller equipment and full commissioning.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 8

Provide rotary screw or scroll air-cooled chillers. Provide high-efficiency air-cooled chillers. Provide constant primary/variable secondary pumping systems on single chiller systems greater than 60 tons and on multiple chiller systems. Primary pumping may be used only on single chiller systems less than 60 tons. Keep flow through the chiller constant; do not use variable primary flow. A buffer tank must be provided on all systems to provide thermal inertia. Provide multiple chillers for loads greater than 160 tons with each chiller sized for 50% of the total facility cooling load.

For unique facilities that exhibit widely variable occupant loading, multiple dissimilar sized chillers must be provided as appropriate for the low occupancy condition and fully occupied condition.

The chillers must be located in an exterior equipment yard area and properly spaced from each other and other equipment away from building perimeter. The air-cooled chiller(s) must be located outside on a 150 mm (6-inch) thick reinforced concrete housekeeping pad. Provide heat tape to ensure freeze protection as low as 10°F on chilled water piping and any other associated appurtenances. Refer to the MCB Camp Lejeune mechanical policy for the requirements for phase and voltage protection requirements for chillers. Provide emergency chiller connections consisting of isolation valves and blind flanges.

Low ambient capability must be provided to allow chillers to operate in temperatures as low as 15°F (-9.4°C).

All coils must have the approved coatings that pass a salt-spray test conducted per ASTM B117 for duration of at least 3,000 hours and provide a minimum of loss of heat transfer due to the thickness of the coating.

Provide the approved quantity, size, spacing, material, and height of bollards around all yard equipment.

Provide blind flanges with butterfly isolation valves at the chiller location for emergency portable chiller connection. Coordinate site plan design to accommodate access needed for an 18-wheeler flat bed to park near the flange location.

Provide chiller controls with BACnet communication protocol.

Provide complete start-up and operational testing of chiller equipment.

Provide heat tracing of the chiller bundle and all above ground piping and valves, etc. that are subject to freezing.

Provide insulation and vapor barriers on all chilled water equipment.

Provide complete system flushing and start-up for the entire chilled water system including piping.

Provide air vents at all terminal equipment and system high points, drains at system low points, and provide chemical treatment equipment for chilled water piping system.

Startup must include operational testing of chiller equipment and full commissioning.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 9

D303002 DIRECT EXPANSION SYSTEMS

Provide a dedicated air-cooled DX ductless split system cooling only unit for IT closets, telecom rooms, and server rooms and any other space requiring independent conditioning. If the unit does not have a BACnet system interface, provide a room temperature sensor and a current sensor, tied to the building DDC system, to determine the operating status of the system. Size DX cooling equipment at 120% of IT equipment load. Provide low ambient cooling.

D3040 DISTRIBUTION SYSTEMS

D304001 AIR DISTRIBUTION, HEATING & COOLING

Provide shutoff-type terminal units with hot water reheat coils to serve occupied spaces except vehicle maintenance labs. To maximize energy savings on this project: the shutoff-type terminal units must comply with ASHRAE 55 and sized to meet indoor design conditions (temperature, humidity, ventilation, etc.) that are used in the design; do not size shutoff-type terminal units to maintain a minimum of 4 AC/Hr in occupied mode.

Provide DOAS units for vehicle maintenance labs to maintain temperature comfort. Units must modulate the amount of DOAS exhaust fan when vehicle exhaust system is active to maintain slightly negative pressure with respect to corridors and classrooms and neutral to slightly positive pressure with respect to the outdoor ambient pressure. If DOAS exhaust fan is turned off and the space is still negative with respect to outdoor, DOAS supply fan must modulate to maintain space pressurization requirements.

Provide insulated, galvanized steel ductwork in concealed locations constructed, braced, reinforced, installed, supported, and sealed in accordance with the IMC and Sheet Metal and Air Conditioning Contractors National Association (SMACNA) standards. For exposed ductwork, provide insulated, double walled, galvanized steel duct.

Provide medium-pressure duct from VAV AHU to shutoff-type terminal unit. Provide round or flat oval primary supply air duct. Size the medium pressure duct according to the static regain method. Provide low-pressure supply air duct from the terminal unit to the zone being served.

Provide low-pressure return air duct from the zone to the VAV AHU. Provide a minimum of 6 diameters of rigid straight duct at the inlet to each VAV terminal to maintain a uniform velocity profile at the valve inlet for airflow measurement accuracy. Flexible duct connection to the primary air inlet of VAV terminal is not permitted.

Provide shutoff-type terminal units typically above lay-in ceilings. Provide terminal units above hard ceilings with lockable access panels.

Provide aluminum grilles, registers, and diffusers. Provide linear slot diffusers including manufacturer insulated plenum.

Provide manual balancing dampers for all main and branch ducts. Incorporate product requirements identified in the UFGS 23 00 00 Manual Balancing Damper Editing Guide, in RFP, Part 6, into project specifications.

Install all metal duct to Seal Class A standard. Insulated flexible duct may be installed in low-pressure supply duct but may not exceed 5 feet in length or provide more than a 45-degree change in direction. Flexible duct may not be installed in return or exhaust air duct.

Provide AMCA 540 and 550 rated louvers.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 10

Size low pressure supply ductwork at 0.08"/100LF and negative pressure return/exhaust at 0.05"/100LF (max).

Provide rigid foil faced board insulation where ducts are exposed in mechanical spaces. Provide pre-manufactured double wall ductwork on building exterior or where ducts are exposed in occupied spaces. Insulate all ductwork.

Mineral fiber blanket wrap must meet the requirements of ASTM C1136, ASTM C1290, ASTM C1338, ASTM E84, UL 723, NFPA 90A, and NFPA 90B.

Rigid mineral fiber must meet the requirements of ASTM C553, ASTM C612, ASTM C1136, ASTM 1393, ASTM E84, and UL 723.

Make duct penetrations of all walls with sheet metal ducts. Flexible duct penetrations of walls are not acceptable.

Coordinate locations of all air devices with ceiling mounted equipment. Maintain minimum of 3'- 0" from ceiling mounted smoke detectors.

Provide unvaned radius elbows with a radius equal to 1 ½ times the duct width. Provide all 90-degree mitered square elbows with turning vanes with a radius equal to 2 times the duct width.

Provide access doors upstream of all elbows with turning vanes.

Do not hangs duct from other ducts.

Provide canvas duct connectors for all equipment ductwork connections containing fans.

Provided grounding across flexible connections with flexible copper grounding straps.

Grounding straps must be bolted or soldered to both the equipment and the duct.

Ductwork and air handling equipment must be sealed and protected from dirt and debris during the entire construction duration.

Provide separate chases for ductwork and piping. Do not install ductwork and piping in the same chase.

Route all ductwork perpendicular and parallel to the building structure.

Where sheet metal is visible through the face of air terminals, paint sheet metal with a flat black enamel finish.

Manual Balancing Dampers (Accessible): Round type is not acceptable. Provide pre-manufactured rectangular type with 16 gage galvanized steel channel frame with corner braces.

Blades will be opposing type 16 gage with a maximum width of 8". Provide with a 20 gage blade stop on units 12" high and under. Provide with position lock, molded synthetic bearings, and square shaft.

Manual Balancing Dampers (Inaccessible): Provide cable operated remote controlled volume dampers in inaccessible branch ducts feeding diffusers. Dampers must be adjustable through the diffuser face with standard hand tools, providing positive balancing of multiple airflows to maintain design air throw and noise criteria. Radial damper must be direct actuated by a brass plated rotary cable which is fixed at the damper end in an integral support bracket. Rotary cable must have a minimum torque service factor of 200% when installed in accordance with manufacturer furnished instructions. The entire assembly must be furnished as one piece for installation with no linkage adjustment required or miscellaneous small parts. Each unit must be factory tested as a complete assembly prior to shipment (100% testing). Accessible cable end must be secured with a factory furnished nylon clamp, allowing maximum placement flexibility.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 11

Positive, direct, two-way damper control must be provided without sleeves, springs, or screw adjustments (that may loosen after ceiling closure).

Motorized dampers frame must be 16 gage (1.6) galvanized steel structural hat channel with tabbed corners for reinforcement for 11 gage (3.05) structural equivalence. Blades must be 14 gage (2.0) equivalent thickness galvanized steel, roll-formed airfoil type for low pressure drop and low noise generation. Blade edge seals must be suitable for -72°F to +275°F and mechanically locked into the blade edge. Adhesive or clip-on type seals are unacceptable. Jamb seals must be flexible metal, compression type to prevent leakage between blade end and damper frame. Blade end overlapping frame is unacceptable. Bearings must be corrosion resistant, permanently lubricated stainless steel sleeve type turning in an extruded hole in the damper frame. Axles must be hexagonal positively locked into the damper blade. Linkage must be concealed out of airstream, within the damper frame to reduce pressure drop and noise.

Submittal must include leakage, maximum air flow and maximum pressure ratings based on AMCA Publication 500. Dampers must be equipped with factory installed damper position indication switch package. The switch package must include two position indication switches linked directly to the damper blade to provide full open and full closed damper blade position.

The switch package must be capable of interfacing with the HVAC control system and provide remote damper blade position status. Factory mounted damper actuators with adjustable memory stops must be furnished and mounted by the damper manufacturer in their factory.

Each damper must be cycle tested at the factory prior to shipment.

D304002 STEAM DISTRIBUTION SYSTEMS

NOT USED

D304003 HOT WATER DISTRIBUTION SYSTEMS

For exterior buried Hot Water Distribution Systems see Section G30, Site Civil/Mechanical Utilities.

Provide a variable speed pumping system to serve the HVAC hot water equipment throughout the facility. Provide two pumps, each sized at 100 percent of building load. Provide insulated steel or copper hot water supply and return piping to serve the HVAC equipment throughout the facility.

Provide valves and related hot water system appurtenances. Provide a bladder type expansion tank and air/solids separator for the hot water system. Provide a shot type feeder for manual chemical feed to the hot water piping system.

Provide insulated steel or copper hot water supply and return piping to serve the HVAC equipment throughout the facility. Insulate piping with mineral fiber insulation.

Provide system flushing and startup for the hot water piping system.

Provide air vents at all terminal equipment and system high points, drains at system low points, and provide chemical treatment equipment for hot water piping system.

Provide complete startup and operational testing of all hot water systems.

Hot-water piping 4-inch and smaller must be ASTM B 88 Type K (below ground) or L (above ground) copper. Electric resistance welded or seamless Schedule 40 black steel pipe conforming to ASTM A 53/A 53M must be used for piping greater than 4-inch.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 12

Provide insulation for piping exposed to outdoor ambient temperatures; provide heat tracing to ensure freeze protection down to 10°F. Heat trace must be UL listed and self-regulating cable construction consisting of two 16 AWG, stranded, nickel plated copper bus wires, between which a positive temperature coefficient conductive polymer heating element is placed. Cable must be provided with tinned copper metal braid for additional protection and path for ground fault currents, and a thermoplastic over jacket.

D304004 CHANGEOVER DISTRIBUTION SYSTEMS

NOT USED

D304005 GLYCOL DISTRIBUTION SYSTEMS

NOT USED

D304006 CHILLED WATER DISTRIBUTION SYSTEMS

Provide For buildings with less than 60 tons of cooling load, provide a constant primary pumping system to serve the HVAC chilled water equipment throughout the facility. For buildings with more than 60 tons of cooling load, provide a constant primary/variable secondary pumping arrangement with a single primary pump per chiller. For buildings with more than 160 tons of cooling load, provide a constant primary/variable secondary pumping arrangement with two primary pumps per chiller. Secondary variable pumps must be dual arm or lead/lag. In all cases, keep flow through the chiller constant.

For buildings less than 160 tons, provide two primary pumps and two secondary pumps, when secondary pumps are required, with each pump sized for 100% flow. For buildings with more than 160 tons, provide three secondary pumps, each sized for 50% of maximum building flow.

Two pumps must operate as duty pumps and the third must act as standby. Provide a control sequence to rotate pump duty/standby assignments monthly and equalize running hours.

Provide valves and related chilled water system appurtenances. Provide an expansion tank and air/solids separator in chilled water system. “Triple duty” or “multi-purpose” valves that combine a check valve, throttling valve, and shut-off valve must not be used for the chilled water system.

Provide air vents at all terminal equipment and system high points for air control. Provide factory installed flanged strainer package.

Provide steel and copper chilled water supply and return piping to serve the HVAC equipment throughout the facility. Insulate piping with cellular glass insulation on all above ground chilled water distribution piping.

Provide air vents at all terminal equipment and system high points for air control. Provide a shot type feeder for manual chemical feed for the chilled water piping system.

Provide flanged connections with flexible braided stainless-steel connectors at all equipment connections.

Provide thermal mass capability in the chilled water system to insure proper control and longevity of chillers by using inertia tanks. Provide inertia tanks, sized per chiller manufacturer recommendation to ensure stability of operation and temperature set point control. Total chilled water system volume must be a minimum of 7 gallons per ton of cooling. Provide an insulated storage tank within the mechanical room in order to meet this requirement.

Provide insulation, vapor barrier, and aluminum jacketing on piping exposed to outdoors. Install heat tracing on piping to ensure freeze protection to 10°F.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 13

Provide insulation for piping exposed to outdoor ambient temperatures; provide heat tracing to ensure freeze protection down to 10°F. Heat trace must be UL listed and self-regulating cable construction consisting of two 16 AWG, stranded, nickel plated copper bus wires, between which a positive temperature coefficient conductive polymer heating element is placed. Cable must be provided with tinned copper metal braid for additional protection and path for ground fault currents, and a thermoplastic over jacket.

Provide pre-manufactured dual containment system consisting of carrier pipe, cellular glass carrier insulation, air space, steel conduit, polyurethane outer insulation, and seamless extruded HDPE casing for direct buried piping. The carrier pipe must be ASTM A53 steel schedule 40 or 80 as scheduled. The product must be rated for corrosion resistance without the need for cathodic protection. Provide with leak detection system.

Chilled water piping 4 inches and smaller must be ASTM B 88 Type K (below ground) or L (above ground) copper. Electric resistance welded or seamless Schedule 40 black steel pipe conforming to ASTM A 53/A 53M must be used for piping greater than 4 inches.

Provide system flushing and startup for the chilled water piping system.

Provide complete startup and operational testing of all chilled water systems a variable speed pumping system to serve the HVAC chilled water equipment throughout the facility. Provide a primary and standby pump each sized at 100 percent of building load.

For buildings with less than 60 tons of cooling load, provide a constant primary pumping system to serve the HVAC chilled water equipment throughout the facility. For buildings with more than 60 tons of cooling load, provide a constant primary/variable secondary pumping arrangement with a single primary pump per chiller. For buildings with more than 160 tons of cooling load, provide a constant primary/variable secondary pumping arrangement with one primary pump per chiller. In all cases, keep flow through the chiller constant.

For building less than 160 tons, provide two primary pumps or two secondary pumps as appropriate with each pump sized for 100% flow. For buildings with more than 160 tons, provide three secondary pumps, each sized for 50% of maximum building flow. Two pumps must operate as duty pumps and the third must act as standby. Provide a control sequence to rotate pump duty/standby assignments monthly and equalize running hours.

Provide valves and related chilled water system appurtenances. Provide a bladder type expansion tank and air/solids separator in chilled water system. “Triple duty” or “multi-purpose” valves that combine a check valve, throttling valve, and shut-off valve must not be used for the chilled water system. Provide air vents at all terminal equipment and system high points for air control.

Provide steel and copper chilled water supply and return piping to serve the HVAC equipment throughout the facility. Insulate piping with cellular glass insulation on all above ground chilled water distribution piping.

Provide air vents at all terminal equipment and system high points for air control. Provide a shot type feeder for manual chemical feed for the chilled water piping system.

Provide thermal mass capability in the chilled water system to insure proper control and longevity of chillers by using inertia tanks. Provide inertia tanks, sized per chiller manufacturer recommendation to ensure stability of operation and temperature setpoint control. Total chilled

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 14 water system volume must be a minimum of 7 gallons per ton of cooling. Provide an insulated storage tank within the mechanical room in order to meet this requirement.

Provide insulation, vapor barrier, and aluminum jacketing on piping exposed to outdoors. Install heat tracing on piping to ensure freeze protection to 10°F.

Provide system flushing and startup for the chilled water piping system.

Provide complete startup and operational testing of all chilled water systems.

Provide insulation for piping exposed to outdoor ambient temperatures; provide heat tracing to ensure freeze protection down to 10°F. Heat trace must be UL listed and self-regulating cable construction consisting of two 16 AWG, stranded, nickel plated copper bus wires, between which a positive temperature coefficient conductive polymer heating element is placed. Cable must be provided with tinned copper metal braid for additional protection and path for ground fault currents, and a thermoplastic over jacket.

Provide threaded joints for steel pipe 2" or less and welded or bolted flange for sizes greater.

Provide flanged connections with flexible braided stainless steel connectors at all equipment connections.

Provide pre-manufactured dual containment system consisting of carrier pipe, cellular glass carrier insulation, air space, steel conduit, polyurethane outer insulation, and seamless extruded HDPE casing for direct buried piping. The carrier pipe must be ASTM A53 steel schedule 40 or 80 as scheduled. The product must be rated for corrosion resistance without the need for cathodic protection. Provide with leak detection system.

Chilled water piping 4 inches and smaller must be ASTM B 88 Type K (below ground) or L (above ground) copper. Electric resistance welded or seamless Schedule 40 black steel pipe conforming to ASTM A 53/A 53M must be used for piping greater than 4 inches.

D304007 EXHAUST SYSTEMS

Provide ductwork constructed, braced, reinforced, installed, supported, and sealed per the IMC and SMACNA standards. Install exhaust duct according to Seal Class A.

Provide ducted exhaust ventilation rate according to ASHRAE 62.1.

Provide stainless-steel fume hoods that are rated for heat and vapor removal with associated ducts and fans.

Provide battery charging area with dedicated exhaust according to IMC 2018 and UFC 3-520-05 requirements.

D304008 AIR HANDLING UNITS

Provide central station VAV AHUs to provide constant temperature primary supply air to all terminal units. Provide hot water preheating coils, chilled water-cooling coils, variable-speed fan sections, ultraviolet coil disinfection systems, and energy recovery sections. Units must include additional sections as necessary to facilitate ready access to all maintainable components.

Provide central station DOASs to provide temperature comfort and differential pressure control.

Provide hot water preheating coils, chilled water-cooling coils, hot water reheat coil variable-speed exhaust and supply fan sections, ultraviolet coil disinfection systems, and energy

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 15 recovery sections. Units must include additional sections as necessary to facilitate ready access to all maintainable components.

The energy recovery section must be a fixed plate total enthalpy heat exchanger with MERV 8 prefilters and MERV 13 filters upstream of the unit in both the outside air and exhaust air streams. If AHU manufacturers are unable to provide these filters in the central station unit, provide ducted filter boxes outside the unit in a location accessible for filter replacement.

Provide the means to measure filtered outdoor airflow to verify proper ventilation.

Provide modular, central station, air handlers with the following:

Unit panels must be 2-inch solid. Exterior surfaces of the unit casing must be factory painted to withstand ASTM B117 90 3000-hour salt spray requirements.

All interior casing panels must be made of stainless steel.

Casing air leakage must not exceed leak class 9 (CL = 9) per ASHRAE 111.

Panel insulation must provide a minimum thermal resistance (R) value of 13 ft²•h•ºF/Btu throughout the entire unit.

Access doors must be 2-inch double-wall construction with latching door handles.

Provide factory-mounted, weather-resistant, light emitting diode (LED) fixtures in sections of the unit for maintenance and service visibility.

Provide a fan array for the supply and return. The fans must be direct drive, single-width, single-inlet plenum. The fan blades must be aluminum backward-inclined airfoil. Fan array fans must be controlled using a common control signal, such as the duct static control signal, to modulate the fan speed.

The fan and motor assembly must be internally isolated from the unit casing, furnished and installed by the unit manufacturer.

Provide with factory mounted VFD for control of fan speed to modulate the airflow.

Provide 24-inch-long (min.) modular inspection sections with removable doors on both sides of the chilled water coil module.

The coil must have a factory applied flexible epoxy polymer coating (1 mil min. thickness) uniformly applied to all coil surface areas without material bridging between fins.

Provide two sets of spare filters for each AHU.

Provide a factory-installed dial type differential pressure gauge piped to both sides of the filter to indicate status.

A mixing section module must be provided to support the damper assembly for outdoor, return, and/or exhaust air. Dampers must modulate the volume of outdoor, return, or exhaust air. The dampers must be of double-skin airfoil design with metal, compressible jamb seals and extruded-vinyl blade-edge seals on all blades. The blades must rotate on stainless-steel sleeve bearings. Airfoil dampers must be rated for a maximum leakage complying with ASHRAE 90.1.

Provide an air blender section to mix outside and return air, minimize stratification, and reduce the risk of frozen coils.

Fully modulating 2-way hydronic coils. If the AHU is at the end of the water loop, a 3-way valve arrangement at the final coil connection is acceptable in lieu of a bypass.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 16

Provide a factory installed combination VFD/disconnect for each fan motor. Each VFD/disconnect must be properly sized, factory mounted in a full metal enclosure, wired to the fan motor (s), and commissioned. VFD/disconnects must include a circuit breaker disconnect with a through-the-door interlocking handle designed to rest only in the full ON or OFF state and must be lockable in these states. A concealed defeater mechanism must allow entry into the enclosure when the handle is in the ON position. The VFD package must also include:

• Electronic manual speed control

• Current limited stall prevention

• Auto restart after momentary power loss

• Speed search for starting into rotating motor

• Anti-windmill with DC injection before start

• Phase-to-phase short circuit protection

• Ground fault protection

D304090 OTHER DISTRIBUTION SYSTEMS

Provide inline pumps with variable frequency drives.

Hangers, Clamps, Rollers, and Supports must comply with MSS SP-58 unless otherwise noted.

Steel channel strut and angle iron are acceptable materials for field constructed trapeze hanger assemblies where the rated load limit is not exceeded. Provide with MSS type carbon-steel hanger rods, nuts, saddles, and U-bolts.

Run all horizontal piping above ceiling unless otherwise noted.

Provide full line size valves except control and balancing valves. Provide extended plugs and labels where piping is insulated. Provide removable insulation over plugs.

Provide manual air vents at all high spots and the ends of all piping loops. Do not use automatic air vents in any place other than mechanical rooms where floor drains are already provided for.

Provide 1/2" drain valves at low points in piping. Provide minimum pitch sufficient to insure adequate venting and draining.

Provide permanent flushing isolation valves and tees at both sides of all hydronic equipment.

Provide tees with ¾” hose end connection and removable brass cap.

Do not hang pipe from other pipe.

Do not use flexible braided pipe to change direction at equipment connections regardless of manufacturer documentation.

Do not bend pipe or pipe hangers to correct poor alignment.

Route all piping perpendicular and parallel to the building structure.

Maintain a minimum of 3'-6" of ground cover over all underground HVAC piping.

Install piping so that all valves, strainers, unions, traps, flanges, and other appurtenances requiring access are accessible from below.

Install valves so that the valves will remain in service when equipment or piping on the equipment side of the valve are removed.

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 17

Provide balancing valves with position indicators and maximum adjustable stops (memory stops).

Provide chain wheel operators for all valves in equipment rooms mounted greater than 7'-0" above floor level; chain must extend to 7'-0" above floor level.

Install unions and/or flanges at each piece of equipment, in bypasses, and in long piping runs (100 feet or more) to permit disassembly for alteration and repairs.

Install all piping without forcing, springing, or bending.

Tap all branch lines from top of piping mains (45 degrees preferred, 90 degrees acceptable).

All valves must be set up and adjusted for smooth and easy operation.

All piping work must be coordinated with all trades involved. Offsets in piping around obstructions must be provided at no additional cost to the government.

Provide stainless steel flexible connections in all piping systems connected to pumps, chillers, cooling towers, and other equipment which require vibration isolation. Flexible connections must be provided as close to the equipment as possible.

Unless otherwise noted, all chilled water and hot water piping must be no less than ¾".

All piping must clear doors and windows.

Provide dielectric fittings at all pipe connections of dissimilar metals.

All piping must be free of dirt, debris, and moisture prior to installation of insulation. Chilled water systems must be disabled, brought to room temperature, and free of external moisture prior to insulation installation.

Install piping in accordance with the latest editions of MSS SP-58 and ASME B31.9. Use MSS type hangers and supports. Provide saddles and base supports. All-thread rod is acceptable for tension support applications only, not compression.

Select thermometers and pressure gages where the operating condition falls within the middle third of the range.

Provide chrome plated escutcheon plates for exposed pipe penetrations in occupied spaces.

Do not route pipe risers in duct shafts. Do not penetrate fire rated shafts with pipe unless the shaft is specifically allocated for that service.

Size all hydronic piping between 1 feet and 4 feet total dynamic head pressure drop per 100' length.

Grooved piping and press fittings are prohibited in all applications.

D3050 TERMINAL & PACKAGE UNITS

D305002 UNIT HEATERS

Provide gas fired or hot water unit heaters to serve the heating requirements of mechanical and air handler rooms of the facility.

D305003 FAN COIL UNITS

NOT USED

Marine Corps Base Camp Lejeune, North Carolina Rev 01

PART 3 - CHAPTER 6/ESR D30 - P1512F LOG OPS SCHOOL - Page 18

D305004 FIN…