N4019222R2012_Amend0003_Attach(8)_6_ESR_D30_Rev1.pdf

FY22 National Guard Readiness Center WON 1674991 Barrigada, Guam Part 3 Chapter 6 D30 HVAC

Final DB-RFP Submittal

PART 3 - CHAPTER 6 / ESR D30 - Page 1

D30 HVAC

Refer to Part 4 Section D30 for performance requirements of the building elements included in the HVAC system.

Air conditioning and ventilation system shall be designed in accordance with the requirement provided in UFC 3-410-01 and Marianas Navy and Marine Corps Design and Construction Standards.

High Performance and Sustainable Building requirements will be implemented under a third-party sustainability metric certification, Leadership in Energy and Environmental Design (LEED) Silver rating is preferred, under the United States Green Building Council (USGBC) certification but not required.

SYSTEM DESCRIPTION

Provide high-efficiency air-cooled type chilled water system with variable speed chilled water pumps, ducted type variable air volume air handling units with vav boxes, dedicated outside air system, computer room air conditioning and fan coil unit. Dedicated DX type split ductless fan coil unit will be provided in Telecom Room in accordance with UFC 3-580-01, and in Support Office located at Maintenance Bay building to meet the required comfort cooling.

Ventilation system will be provided in accordance with Army National Guard DG 415-1 & 3, ASHRAE 62.1, UFC 3-410-01 and other applicable codes. Refer to the part 3 room requirements.

Provide chemical fume hood in POL Lab and canopy fume hood in ALSE Office.

There shall be no ventilation or mechanical equipment mounted on the roof of the building for new construction. If mounting on the roof is necessary, the Designer of Record shall first obtain approval from NAVFAC and the base prior to designing rooftop equipment. If installed on the roof, the equipment shall be secured to the roof, with fasteners, and support structure to comply with the applicable typhoon, wind and seismic design standards indicated in the latest edition(s) of the IBC, ASCE 7, UFC 3-301, and UFC 3-310 including any additional required standards for the respective installation in Guam with due consideration for topographic and geographic features that may amplify wind loads by applying the appropriate Kzt topographic factor and using the appropriate exposure category.

GENERAL SYSTEM REQUIREMENTS

Provide working space around all equipment. Provide all required fittings, connections and accessories required for a complete and usable system. All equipment shall be installed per the criteria in PTS Section D30 and the manufacturer's recommendations. Where the word "should" is used in manufacturer’s instructions, substitute the word "shall".

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

Outside Conditions (Cooling 1.0%)

Summer 89 Degrees F dry bulb

32 Degrees C dry bulb

PART 3 - CHAPTER 6 / ESR D30 - Page 2

80 Degrees F wet bulb

27 Degrees C wet bulb

Indoor Design Conditions (General Space) Summer 78 Degrees F dry bulb

57 Degrees F dew point

50 Relative Humidity

Indoor Design Conditions (ARMS Vault)

Summer 78 Degrees F dry bulb < 40% Relative Humidity

Provide Ventilation rates and systems per latest edition of ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality, and DG 415-1 & 3 Table of Mechanical Requirements. If conflict occurs between standards, the more stringent requirements take precedence.

Provide ventilation for the Restroom, Janitor closet, POL Lab, ALSE Room, POL ROOM, General Purpose Training Bay, Unheated Storage, and Mechanical room located in Maintenance Training Bay / Unheated Storage Building.

The HVAC system shall provide each zone with cooling year-round unless otherwise indicated. Each zone shall have its own limited range of control, as allowed by the control system central workstation.

Zone the HVAC system as follows:

Main Building:

Zone 1 – Offices, (Conditioned Space) Zone 2 – Classrooms and Unit Locker, (Conditioned Space) Zone 3 – Utilities Area, (Conditioned Space) Zone 4 – Storage Area, (Conditioned Space) Zone 5 – ARMS Vault, (Conditioned Space) Zone 6 – POL LAB, (Conditioned Space) Zone 7 – Maintenance Training Bay, (Unconditioned Space) Zone 8 – Unheated Storage, (Unconditioned Space) Zone 9 – Support Office (Conditioned Space)

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

The AHUs and DOAS cooling coil must be constructed of seamless all copper tubes and copper fins with an ASTM 10,000-hour salt spray test and ultraviolet protective coating.

Air-cooled outdoor condensing units will be in the Mechanical yard with protective enclosure, with factory coated copper to copper coils and fins and shall have an equivalent 10,000-hours salt spray or better per ASTM B117 and an additional UV top coating in accordance with MDACS 2019.

Material and Equipment Qualifications: All materials and equipment shall have been in satisfactory commercial or industrial use for 2 years prior to the RFP closing date. The 2-year use shall include

PART 3 - CHAPTER 6 / ESR D30 - Page 3 applications of equipment and materials under similar circumstances and of similar size. The product shall have been for sale on the commercial market through advertisements, manufacturer's catalogs, or brochures during the 2-year period. Products and equipment specified shall have a local manufacturer’s representative and a local service organization that can respond to trouble shoot equipment problems within a 24-hour period. All equipment shall be installed per the manufacturer’s recommendation. A manufacturer’s representative shall be on-site during system start up.

Motors: All Motors shall be premium efficiency types corresponding to the applications listed I NEMA MG 11.

Provide flexible, porous, poison-free ultra-marine grade stainless steel mesh and all related fasteners or other similar termite barrier system at all foundation and floor slab penetrations.

D3010 ENERGY SUPPLY

D301001 OIL SUPPLY SYSTEM

Lube oil with pneumatic pumps will be provided in General Purpose Training Bay for general maintenance of vehicle.

Fuel oil piping system will be provided in Generator Building.

D301002 GAS SUPPLY SYSTEM

Not used.

D301003 STEAM SUPPLY SYSTEM (FROM CENTRAL PLANT)

Not used.

D301004 HOT WATER SUPPLY SYSTEM (FROM CENTRAL PLANT)

Not used.

D301005 SOLAR ENERGY SUPPLY SYSTEMS

D3020 HEAT GENERATING SYSTEMS

D302001 BOILERS

PART 3 - CHAPTER 6 / ESR D30 - Page 4

D302002 FURNACES

D302003 FUEL-FIRED UNIT HEATERS

Not used.

D302004 AUXILIARY EQUIPMENT

Not used.

D302005 EQUIPMENT THERMAL INSULATION

Not used.

D3030 COOLING GENERATING SYSTEMS

D303001 CHILLED WATER SYSTEMS

Packaged type air-cooled chilled water system will be provided in Main Building. Chilled water type AHU, DOAS, CRAC and FCU will be provided based on HVAC zoning.

D303002 DIRECT EXPANSION SYSTEMS

Provide ductless split type system assemblies, Energy Star rated, and designed to be used together with ratings based on the use of a matched assembly with the following minimum efficiency requirements:

1.5 to 5 tons: SEER 15 5 tons or greater: EER of 11

Indoor unit and outdoor condensing unit shall be by the same manufacturer and shall be tested in accordance with ARI 210/240 or ARI 360 as applicable prior to providing a coil protective coating. Air cooled condensing units shall be mounted on neoprene vibration isolators on an exterior concrete pad. The exterior equipment shall be protected with concrete block walls to prevent damage from typhoons, and continued exposure to salt air. The condensing unit casings shall be coated with a corrosion resistant epoxy coating and the condensing coils shall be coated with a minimum of two coats of resin based thermosetting phenolic coating. All exterior equipment shall be secured to withstand typhoon force winds. Provide new refrigerant and condensate drain piping. Refrigerant suction line shall be insulated, and metal jacket provided to protect the insulation. Piping shall not run exposed up exterior walls. Pressure test the refrigerant lines prior to closing up walls. Provide nail guards for refrigerant lines in exterior and interior walls.

Telecom room must be provided with independent DX split type wall mounted in addition to supply air from Central AHU unit for positive pressurization.

Provide DX split type wall mounted fan coil unit in Support Office located at Maintenance Training Bay / Unheated Storage Building.

PART 3 - CHAPTER 6 / ESR D30 - Page 5

D3040 DISTRIBUTION SYSTEMS

D304001 AIR DISTRIBUTION, HEATING & COOLING

Provide insulated, galvanized steel ductwork constructed, braced, reinforced, installed, supported, and sealed per the IMC and SMACNA standards. Seal duct joints and seams to meet duct leakage criteria of less than or equal to 0.2 l/s/SM (4 cfm/100 SF) of conditioned floor area to comply with Energy Star requirements. Ductwork shall be galvanized steel sheets fabricated and erected in with SMACNA Metal Duct Construction Standards with fiberglass duct external duct insulation, flexible where concealed, rigid where exposed or outside, 50 mm (2”) minimum thickness, 1.5 lbs/cf. Insulate all air conditioning supply, return, and outside air ducts. No insulation shall be installed inside ductwork. All ductwork in the attic space including outside air, supply air, and exhaust air shall be insulated for condensation control in the attic space. The vertical ductwork shall have access panels for duct cleaning and the Contractor shall provide duct system cleaning plan that allows maintenance personnel to clean periodically for indoor air quality in the prevention of mold. During construction, the Contractor shall temporarily cap duct openings to prevent construction dust from getting into the ductwork. The ductwork shall be cleaned just prior to turnover.

Provide stainless steel ductwork constructed, braced, reinforced, installed, supported, and sealed per the IMC and SMACNA standard for unconditioned areas and ductwork connecting outside air louvers to Dedicated Outdoor Air or Airconditioning and Ventilation system.

Provide a Variable Air Volume (VAV) system using ducted returns. VAV units shall be located above ceilings and allow for maintenance and removal of units through lockable access panels.

Variable air volume boxes shall be suitable for a single duct system application with actuators and controls.

Enclosures shall be galvanized steel not lighter than 0.85 mm

Provide aluminum grilles, registers, and diffusers.

Provide security bars/grilles at large opening for duct as per UFC 4-010-05 on secured area. Diffusers, registers, and grilles shall be aluminum with stainless steel screws and fasteners. Ceiling diffusers and registers shall be provided with anti-smudge devices. Diffusers, registers, and grilles shall be similar. Supply grilles shall be double deflection type. Provide opposed blade dampers as face of registers, diffusers, and grilles. Do not locate diffusers near operable windows or doors to the exterior to prevent humid air from coming into contact with the diffuser or register resulting in condensation. Where there is potential for outside air to come into contact with supply air terminal devices, use supply air registers or grilles.

Provide motorized dampers on outside air intakes and at exhaust outlets. Dampers shall be low leakage type and interlocked with the exhaust fan, or supply fan unit so that the dampers close when the unit is not in operation to prevent hot humid air from infiltrating into the building when the system is off.

Provide an emergency shut down switch or means to shut down the entire HVAC system in the event of an AT/FP emergency. The emergency shut down shall close all dampers on outside air intakes and exhaust outlets from the building to prevent air from entering the building from the building exterior. Locate all outside air intakes at least 3 meters above grade to meet AT/FP criteria.

D304002 STEAM DISTRIBUTION SYSTEMS

PART 3 - CHAPTER 6 / ESR D30 - Page 6

D304003 HOT WATER DISTRIBUTION SYSTEMS

Not used.

D304004 CHANGEOVER DISTRIBUTION SYSTEMS

Not used.

D304005 GLYCOL DISTRIBUTION SYSTEMS

D304006 CHILLED WATER DISTRIBUTION SYSTEMS

Provide chilled water pump with variable frequency drive motor control.

Provide schedule 40 black steel with screwed fittings for pipe 2” (51mm) and smaller, welded or mechanical joints for bigger pipe.

Valves, 2” (51 mm) and smaller shall be ball valves, bronze, bigger than 2” (51 mm) shall be butterfly valves wafer or lug type, cast iron with bronze trim. Insulation shall be cellular glass.

Exterior insulated piping shall be provided with stainless steel jacket. All insulated piping shall be provided with a vapor barrier and protective jacket.

D304007 EXHAUST SYSTEMS

Provide ductwork constructed, braced, reinforced, installed, supported, and sealed per the IMC and SMACNA standards.

Provide ducted exhaust ventilation systems and exhaust fans to serve all ventilated zones of the facility.

Provide in-line exhaust fan in restroom areas, janitor closets and POL Room. Operation of exhaust fan in restroom is intermittent. Continuous ventilation will be provided in janitor closet and POL room.

Provide sidewall centrifugal type exhaust fan on General Purpose Training bay and Unheated Storage Area.

Wall-mounted propeller type exhaust fan type will be provided in Generator Room and controlled by thermostatic controller.

Exhaust ducts shall terminate through the wall only and there shall be no roof terminations.

D304008 AIR HANDLING UNITS

Provide variable volume air handling units with ultraviolet disinfection system. Provide a factory fabricated single zone draw through type air handling unit. Unit to include fans, coils, airtight insulated casing, prefilters, secondary filter sections, adjustable V-belt drives, belt guards for externally mounted motors, PART 3 - CHAPTER 6 / ESR D30 - Page 7 access sections, combination sectional filter mixing box, pan vibration-isolators, and appurtenances required for specified operation. Provide with vibration isolators. Air Handling unit shall have the following features:

• Provide insulated, galvanized steel, double wall, 2” (50mm) thick pre-insulated air handling unit. The air handling unit shall be constructed of a minimum 1.3 mm galvanized steel.

• Provide UV light downstream of the cooling coil. It has shut-off and door interlock switch.

• Furnish casings with access sections, inspection doors, and access doors, all capable of opening a minimum of 90 degrees.

• Insulated, fully gasketed, double wall type inspection and access doors, of a minimum 1.3 mm outer and one mm inner panels made of galvanized steel.

• Double wall insulated type drain pan constructed of 1.4 mm type 316 stainless steel, conforming to

ASHRAE 62.1.

• Casing insulation that conforms to NFPA 90A with not less than “(50mm) of the same insulation specified for single wall casings. Foil faced insulation is not an acceptable substitute for use with double wall casing.

Double wall insulation shall be completely sealed by inner and outer panels.

• Coils shall be fin and tube type constructed of seamless copper tubes and copper fins. Provide casing and tube support sheets that are not lighter than 16-gauge galvanized steel, formed to provide structural strength. Coils with more than 50% of outside air flow shall be provided with a phenolic coating for corrosion protection.

• 2” (50 mm) depth, sectional, disposable type filters of the size indicated with a MERV of 8 when tested according to ASHRAE 52.2.

• Fans shall be double inlet, centrifugal type with each fan in a separate scroll, dynamically balanced.

• Provide access section and construct access sections with filter/mixing boxes in a manner identical to the remainder of the unit casing and equipment with access doors. Design mixing boxes to minimize air stratification and to promote thorough mixing of the air streams.

• Provide manual dampers at return and outside air connections to the Air Handling Unit.

D304090 OTHER DISTRIBUTION SYSTEMS

Provide make-up air intake louver with low leakage motorized damper on General Purpose Training bay and Unheated Storage Area.

Provide vehicle tailpipe exhaust system in General Purpose Training bay.

D3050 TERMINAL & PACKAGE UNITS

D305002 UNIT HEATERS

PART 3 - CHAPTER 6 / ESR D30 - Page 8

D305003 FAN COIL UNITS

D305004 FIN TUBE RADIATORS CONVECTORS

Not used.

D305005 ELECTRIC HEATING

Not used.

D305006 PACKAGE UNITS

Not used.

D3060 CONTROLS AND INSTRUMENTATION

D306001 HVAC CONTROLS

D306001 1.1 DIRECT DIGITAL CONTROLS (DDC)

Provide a complete Direct Digital Control (DDC) system to comply with UFGS 23 09 23.13 20 BACnet Direct Digital Control Systems for HVAC for the facility.

Provide notebook computer and complete application software with all licenses.

Provide air handlers and all terminal units, including VAV boxes, with discharge/supply temperature sensors.

Provide central air handler unit outside air CFM air flow monitoring stations.

Provide control to automatically start back-up HVAC equipment if the primary device fails. Primary and back-up equipment starter circuits shall be wired to prevent both pieces of equipment from operating at the same time. Rotate primary and back-up HVAC equipment monthly (adjustable) with a lead/lag control routine.

Provide humidistats or humidity sensors to monitor humidity in occupied conditioned spaces and to control humidity control systems.

D306001 1.2 ELECTRONIC CONTROLS

Provide electronic controls for the HVAC systems and equipment.

Provide humidistats or humidity sensors to monitor humidity in occupied conditioned spaces and to control humidity control systems.

PART 3 - CHAPTER 6 / ESR D30 - Page 9

D3070 SYSTEMS TESTING AND BALANCING

Provide complete Testing and Balancing (TAB) of all air distribution systems and HVAC equipment.

D307003 HVAC COMMISSIONING

Refer to Project Program section 2.3.4 for Building Commissioning requirements. Mechanical systems to be commissioned, if provided, include HVAC systems and controls, refrigeration systems and controls, and domestic hot water systems.

D3090 OTHER HVAC SYSTEMS AND EQUIPMENT

D309001 GENERAL CONSTRUCTION ITEMS

Provide seismic restraints and Comply with the Force Protection Criteria.

D309090 OTHER SPECIAL MECHANICAL SYSTEMS

Provide wrap-around type heat pipe energy recovery in the air handling system.

Provide chemical fume hood in POL LAB with integral fire suppression system.

Provide fume hood in ALSE and NVG Office.

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