AM-0001_SPECS.pdf

OAO Building 364 HVAC Improvements Statement of Work Camp Foster, MCB, Okinawa, Japan 19SF0009

DIVISION 1

01 11 00 – A

Design-Build

STATEMENT OF WORK

(AM-0001)

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TABLE OF CONTENTS

CHAPTER 1 DESIGN AND CONSTRUCTION OBJECTIVES ......................... 1-1

1-1 SCOPE OF WORK ................................................ 1-1

1-2 APPLICABLE CRITERIA ............................................ 1-1

1-3 DESIGN/BUILD CONDITIONS ........................................ 1-1

1-4 DESIGN FREEDOM ................................................ 1-1

1-5 AS-BUILT DRAWINGS WITH PROPOSED CHANGES ........................... 1-1

CHAPTER 2 CIVIL ENGINEERING .......................................... 2-1

2-1 NOT USED .................................................... 2-1

CHAPTER 3 ARCHITECTUAL DESIGN ........................................ 3-1

3-1 NOT USED .................................................... 3-1

CHAPTER 4 STRUCTURAL DESIGN .......................................... 4-1

4-1 NOT USED .................................................... 4-1

CHAPTER 5 MECHANICAL ENGINEERING ..................................... 5-1

5-1 DESIGN GOALS AND OBJECTIVES ..................................... 5-1

5-2 APPLICABLE CODES .............................................. 5-1

5-2.1 Government standards............................................ 5-1 5-2.2 Industry standards and codes.................................... 5-1

5-3 MECHANICAL ROOM ............................................... 5-2

5-4 DESIGN CALCULATIONS ............................................ 5-2

5-5 MATERIALS AND EQUIPMENT ........................................ 5-3

5-5.1 Air Handling Units (AHU’s)...................................... 5-4 5-5.2 Variable Air Volume (VAV) and Constant Air Volume (CAV) Terminal Units 5-6

5-6 OTHER REQUIREMENTS, CONSIDERATIONS AND BACKGROUND ................... 5-6

5-7 CONTROLS .................................................. 5-85-7

5-8 DETAILED SPECIFICATION ......................................... 5-8

CHAPTER 6 ELECTRICAL ENGINEERING ..................................... 6-1

6-1 DESIGN GOALS AND OBJECTIVES ..................................... 6-1

6-2 APPLICABLE CODES AND STANDARDS ................................... 6-3

6-3 ELECTRICAL DISTRIBUTION SYSTEM ................................... 6-4

6-4 DESIGN CALCULATIONS ............................................ 6-5

6-5 MATERIALS AND EQUIPMENT ........................................ 6-6

6-6 DETAILED SPECIFICATIONS ........................................ 6-7

CHAPTER 7 FIRE PROTECTION ENGINEERING ................................ 7-1

7-1 NOT USED .................................................... 7-1

CHAPTER 8 ENVIRONMENTAL REQUIREMENTS ................................. 8-1

8-1 ENVIRONMENTAL ISSUES ........................................... 8-1

8-2 ASBESTOS ..................................................... 8-1

8-3 LEAD ........................................................ 8-2

8-4 DETAILED SPECIFICATIONS ........................................ 8-2

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CHAPTER 1

DESIGN AND CONSTRUCTION OBJECTIVES

1-1 Scope of Work

Restoration of the HVAC system in building 364, Camp Foster, MCB Okinawa.

Remove the existing air handling units and replace with new variable air volume air handlers. Install variable air volume and constant air volume terminal units in the existing duct system. Provide all electrical, controls, and ceiling access panels for the new equipment.

1-2 Applicable Criteria

See discipline chapters for Unified Facilities Guide Specifications (UFGS), Unified Facilities Criteria (UFC), and non-governmental standards applicable to this project.

1-3 Design/Build Conditions

Building 364, Camp Foster, is currently in use as the US Army Corps of Engineers, Japan District, Okinawa Area Office. The three story building has an air handling unit (AHU) on each floor that provides air conditioning and outside air supply. The AHU’s are constant volume, chilled water units that were part of the original construction in 2002. The supply and return plenums are insulated on the interior and show signs of moisture and mold grow on the insulation surface. The chiller was replaced in 2015.

1-4 Design Freedom

The designer/builder is provided with discipline specific narratives and drawings in this RFP that outline minimum requirements of the design and construction. The designer is encouraged to exercise initiative to provide a complete and usable system design.

1-5 As-Built Drawings with Proposed Changes

As-built drawings are available for the system (all disciplines) and will be provided in electronic format upon request. The Offeror is responsible for verifying all existing conditions, and the Government is not responsible for the accuracy of the drawings.

End of CHAPTER 1

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CHAPTER 2

CIVIL ENGINEERING

2-1 Not Used

End of CHAPTER 2

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CHAPTER 3

ARCHITECTURAL DESIGN

3-1 Not Used

End of CHAPTER 3

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CHAPTER 4

STRUCTURAL DESIGN

4-1 Not Used

End of CHAPTER 4

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CHAPTER 5

MECHANICAL ENGINEERING

5-1 Design Goals and Objectives

Replace the existing air handling units in building 364, Camp Foster, with new variable air volume (VAV) units. Provide and install (30) VAV and (3) CAV Pressure Independent Terminal Boxes, using the existing ductwork. Add supply and return air to room 117. Provide controls for AHU variable frequency drives (AHU blowers) to maintain duct pressure setpoint and for VAV boxes to control temperature within the zones/rooms served. Provide access panels for VAV/CAV box maintenance. Clean all supply ductwork and test and balance the air and chilled water systems.

Includes the return air/outdoor air mixing box and the supply air plenum replacement. All ductwork required to connect the new AHU’s to the existing ductwork distribution system. Provide (3) CAV Pressure Independent Terminal Boxes to supply conditioned air to the ceiling plenums on the second and third floors (exhaust through existing ventilation openings). Provide chilled water and condensate drain piping required to connect the new air handlers to the existing piping in the mechanical rooms. Test & Balance new AHU’s and VAV boxes, both air and water flows.

The existing exhaust ventilation system (toilets, etc.) in the building is not part of this scope of work.

Demolition work – Remove the existing air handling units and supply and return plenums.

5-2 Applicable Codes

5-2.1 Government standards

Unified Facilities Criteria (UFC). PDF versions of these UFC can be found online at: http://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc.

UFC 1-200-01 DOD Building Code (General Building Requirements) UFC 3-401-01 Mechanical Engineering UFC 3-410-01 Heating, Ventilating and Air Conditioning UFC 3-440-05N Tropical Engineering

5-2.2 Industry standards and codes

a. American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) ASHRAE 62.1 Ventilation for Acceptable Air Quality ASHRAE 111 Practices for Measurement, Testing, Adjusting and Balancing of Building HVAC Systems ASHRAE Handbook, Applications ASHRAE Handbook, Fundamentals

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ASHRAE Guideline 1.1-2007: HVAC Technical Requirements for the Commissioning Process

b. National Fire Protection Association (NFPA) NFPA 90 Standard for the Installation of Air-Conditioning and Ventilating Systems

c. Sheet Metal and Air Conditioning Contractor’s National Association (SMACNA) SMACNA HVAC Duct Construction Standards

5-3 Mechanical Room

The existing mechanical rooms will be used for the new air handling units.

5-4 Design Calculations

See specification section 01 33 16 Design After Award for design requirements. Replace (3) air handling units (AHU’s) with variable air volume (VAV) units with a capacity equal to or greater than the existing units.

Confirm the as-built capacities shown below. Calculate the static pressure loss (internal and external) in both the return and supply air ductwork, with the added VAV terminal units, to determine the fan power requirements.

Existing Capacities per as-built drawings:

AHU-1:

16590 CMH Supply air/500 PA ESP 1680 CMH outside air 79.7kW Total cooling capacity

EAT 25CDB/18.7CWB

LAT 12.8DB

AHU-2:

16470 CMH Supply air/500 PA ESP 2060 CMH outside air

84.4 kW Total cooling capacity

EAT 25CDB/18.7CWB

LAT 12.8DB

AHU-3:

17680 CMH Supply air/500 PA ESP 1470 CMH outside air

83.3 kW Total cooling capacity

EAT 24.6CDB/18.2CWB

LAT 12.8DB

Size and select VAV and CAV boxes to serve the existing spaces per the drawings in 01 11 00-B. Verify the air flows for each space from the as-built drawings as shown below:

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Air handling unit 1 - First floor

Designation Rooms served Air flow

(CMH)

Min OA

(CMH)

VAV-1 107/108/122 3910 410

VAV-2 116/117/118 1960 235

VAV-3 119 700 73

VAV-4 113 1100 115

VAV-5 125/126 680 71

VAV-6 123 670 70

VAV-7 129/131 780 76

VAV-8 129 780 82

VAV-9 129 1560 164

VAV-10 129/130 3010 316

Air handling unit 2 - Second floor

Designation Rooms served Air flow

(CMH)

Min OA

(CMH)

VAV2-1 210/211 2790 334

VAV2-2 212 400 48

VAV2-3 214 2240 268

VAV2-4 214 2800 335

VAV2-5 216 1120 134

VAV2-6 216 560 67

VAV2-7 216 560 67

VAV2-8 216 1120 134

VAV2-9 218 640 77

VAV2-10 221/222 3740 448

CAV2-1 Ceiling plenum 400 400 CAV2-2 Ceiling plenum 100 100

Air handling unit 3 - Third floor

Designation Rooms served Air flow (CMH) Min (CMH)

VAV3-1 308/309/311/312/313 5920 492

VAV3-2 315 1200 100

VAV3-3 317 1280 106

VAV3-4 318 930 77

VAV3-5 323 1200 100

VAV3-6 321 560 47

VAV3-7 314 620 52

VAV3-8 326 720 60

VAV3-9 319/320/326 2470 205

VAV3-10 326 2160 180

CAV3-1 Ceiling plenum 620 620

5-5 Materials and Equipment

All US standards listed for the AHU’s and VAV’s can be substituted for Japanese Industrial Standards (JIS) equivalents if approved by the Contracting Officer’s Representative (COR).

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All materials and equipment shall be the standard catalogued products of manufacturers regularly engaged in the production of such equipment and material and shall be the manufacturer’s latest design. All equipment and material shall conform to the requirements of American National Standards Institute (ANSI), American Society of Testing and Materials (ASTM), National Fire Protection Association (NFPA), Japanese Industrial Standards (JIS) or other national trade association, as applicable. Where standards exist, materials and equipment shall bear the label and be listed by Underwriters Laboratories, Inc. (UL) or other recognized testing organization.

All ductwork shall be galvanized sheet metal construction except outside air ductwork that shall be stainless steel.

Ceiling access panels shall be constructed of aluminum with a finish to match the existing ceiling. The access panels shall be dimension to allow access above the ceiling for installation and maintenance of the VAV/CAV boxes and for the cleaning of the ductwork.

5-5.1 Air Handling Units (AHU’s)

Provide a central-station type, factory-fabricated, and sectional assembled AHU. Provide AHU that includes components and auxiliaries in accordance with AHRI 431 SI. Balance the AHU fan and motor according to ISO 21940-11. Ensure that the total static pressure and coil face area classification conforms to

AMCA 99.

5-5.1.1 Unit Cabinet

Provide an AHU cabinet suitable for the pressure class determined from the duct static pressure calculations and that has leak-tight joints, closures, penetrations, and access provisions. Provide a cabinet that does not expand or contract perceptibly when fans are starting or stopping and that does not pulsate during operation. Stiffen pulsating panels, which produce low-frequency noise due to diaphragming of unstable panel walls, to raise the natural frequency to an easily attenuated level. Fabricate the enclosure from continuous hot-dipped-galvanized steel no lighter than 0.91 millimeter 20 gauge thickness, to match the industry standard. Provide mill-rolled structural-steel that is hot-dip-galvanized or primed and painted. Corrosion-protect cut edges, burns, and scratches in galvanized surfaces. Provide seams that are welded, bolted, or gasketed and sealed with a rubber-based mastic.

Make entire cabinet floor and ceiling hot-dipped-galvanized steel.

Provide cabinets and casings that are double-walled with 50 mm insulation.

Provide a stainless steel or hot dipped galvanized interior wall that allows the interior of the air handling unit to be cleaned by spraying with water without absorption into the insulation.

Provide a marine-type, vapor-proof service light in the fan segment. Provide a 100 watt (W) service light that is wired to an individual switch and operates on 115 V, single-phase, 60 Hz service that is separate from the main power to the AHU. Provide a single 115 V outlet at the light switch.

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5-5.1.2 Fan

Ensure that fan wheels are dynamically and statically balanced at the factory. Provide a fan with RPM that is 25 percent less than the first critical speed. Provide a fan shaft that is solid, ground and polished steel and coated with a rust inhibitor. For variable air volume AHUs that are provided with variable-frequency drives, have their fans balanced over the entire range of operation (20 percent to 100 percent RPM). Balancing fans of only 100 percent design of RPM is not acceptable for AHUs to be used with variable-frequency drives. Mount fans on isolation bases. Provide heavy-duty, open drip-proof, three-phase fan motors, operable at the current AHU motor voltage, provide high efficiency motors. Internally mount motors on the same isolation bases and internally isolate fans and motors.

5-5.1.3 Drain Pans

Provide intermediate-coil, 80 millimeter deep drip pans for each tiered coil bank. Extend the top pan 300 millimeter beyond the face of the coil, and extend the bottom pan not less than 600 millimeter beyond the face of the coil. Where more than two pans are used, make the pan extension proportional.

Make adequate supports from the same type of material as the pans or from hot-dip galvanized angle iron with isolation at the interface. Use 0.85 millimeter 22-gauge, AISI Type 304, corrosion-resistant steel for pan material, with silver-soldered joints. Minimum size of the drain opening is 32 millimeter. Pipe the pan to the existing floor drain.

Extend the integral cabinet drain pan under all areas where condensate is collected and make it watertight with welded or brazed joints, piped to the drain. Provide corrosion protection in condensate collection areas, and insulate against sweating. Provide minimum 2.0 millimeter 14-gauge sheet metal; however 16-gauge double-drain-pan construction is also acceptable.

Provide cooling coil ends that are enclosed by the cabinet and are factory insulated against sweating or drain to a drain pan.

Provide drain pans that are double-pan construction, thermally isolated from the exterior casing with 25.4 millimeter thick fiberglass insulation. Provide drain pans that slope to the drain and drain substantially dry by gravity alone when the drains are open. Provide pans that have a double slope to the drain point.

5-5.1.4 Insulation

Provide a unit that is internally fitted at the factory with a sound-attenuating, thermal-attenuating, fibrous-glass material not less than 50 millimeter thick. Rigid foam insulation of equal thermal resistance to 50 mm of fibrous-glass can be used as well. Ensure that the insulation precludes any condensation on any exterior cabinet surface under conditions that are normal to the unit's installed location. Provide acoustic treatment that attenuates fan noise in compliance with specified noise criteria. Apply material to the entire cabinet with waterproof adhesives and permanent fasteners. Provide adhesive and insulating material in accordance with NFPA 90A. Provide insulated plenums. The interior surface of the insulation shall be covered by a factory installed stainless or galvanized steel panel that allows the interior of the air handling unit to be cleaned by spraying with water without absorption into the insulation. Duct plenums for return, W912HV-20-R-0011- SECTION 01 11 00-A - SOW CHAPTER 5-6 outdoor air, and supply air, shall have exterior insulation, no insulation shall be applied to the interior of any ductwork or duct plenums.

5-5.1.5 Coils

Provide a coil section that encases cooling coils and drain pipes. Arrange coils for horizontal air flow. Provide intermediate drain pans for multiple-coils installation. Completely enclose coil headers with the insulated casing with only the connections extending through the cabinet.

Provide 15.875 millimeter outside diameter copper tubing for coils. Provide fins that are copper or aluminum and mechanically bonded by tubing expansion with a maximum spacing of 12 fins per 25.4 millimeter unless otherwise noted.

Provide coils that have supply and return connections on the same end.

5-5.1.6 Filters

Provide factory-fabricated filter sections of the same construction and finish as the unit casings. Provide filter sections that have filter guides and full height, double-wall, hinged, and removable access doors for filter removal. Provide air sealing gaskets to prevent air bypass around filters.

Provide visible identification on media frames showing the model number and airflow direction. Where a filter bank is indicated or required, provide a means of sealing to prevent bypass of unfiltered air. Ensure that the filters perform in accordance with ASHRAE 52.2.

Select filters conforming to UL 900, Class 1. Ensure that when clean filters are exposed to flame, the filters do not contribute fuel when attacked by flame and emit only negligible amount of smoke. Provide permanent frames with replaceable media, 25.4 millimeter thickness, and size as indicated.

5-5.1.7 Outside Air Filters

Provide an extended-surface, factory-assembled air filters with supported cartridges. Provide extended surface filter units fabricated for disposal when the dust-load limit is reached as indicated by maximum (final) pressure drop. Filter Grades, Nominal Efficiency and Application: Grade D: 25 to 30 percent nominal efficiency pre-filter.

5-5.1.8 Air Filter Gauges

Provide manometer air filter gauges of the inclined tube differential type that have solid acrylic plastic construction with a built-in level vial and with an adjustable mirror-polished scale. Equip gauges with vent valves for zeroing and over-pressure safety traps. Ensure that the gauge range is adequate for the particular installation. Provide one air filter gauge at each filter bank.

5-5.2 Variable Air Volume (VAV) and Constant Air Volume (CAV) Terminal Units

5-5.2.1 Constant Air Volume (CAV) Single Duct Terminal Units

Provide constant volume, single duct, terminal units that contain within the casing, a constant volume, pressure independent regulator. Provide volume

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regulators that control air delivery to within plus or minus 5 percent of specified air flow subjected to inlet pressure from 200 to 1500 Pa. Provide electric reheat coils at the (3) CAV units to reheat the air from 12.7C (55F) to 21C (70F).

5-5.2.2 Variable Air Volume (VAV) Single Duct Terminal Units

Provide variable volume, pressure independent, single duct, terminal units with a calibrated air volume sensing device, air valve or damper, actuator, and accessory relays. Provide units that control air volume to within plus or minus 5 percent of each air set point volume as determined by the thermostat with variations in inlet pressures from 200 to 1500 Pa. Provide units with an internal resistance not exceeding 100 Pa at maximum flow range. Provide external differential pressure taps separate from the control pressure taps for air flow measurement with a 0 to 250 Pa range.

The supply air inlet ductwork to the VAV terminal units shall have a minimum straight length equivalent of 6 to 8 times the VAV box inlet size. Where the existing supply air ductwork is not long enough to provide for this minimum straight inlet length, the requirement shall be waived and the Contractor shall maximize the straight length. If the supply air ductwork length is insufficient to allow for the installation of the VAV box, modification to the supply air ductwork is required.

5-5.3 Duct Smoke Detectors

Provide duct smoke detectors for each air handling unit, downstream of the air filters and ahead of any branch connections. The duct smoke detectors detect smoke in the air handling unit and shall be monitored and supervised at the building fire alarm panel.

5-6 Other Requirements, Considerations and Background

Testing, Adjusting and Balancing (TAB) - The Testing and Balancing contractor shall be hired by the Prime Contractor, shall not be a member of the design team and shall be certified as either a member of AABC or certified by the NEBB or the TABB. Equivalent Japanese TAB credentials are acceptable if approved by the US government contracting officers’ representative. Provide the TAB report showing the air balance for building ductwork. Air flows shall be within ± 10% of the calculated values per the design. Supply, return, and outdoor air flows shall be tested and balanced.

Phasing – The building will be occupied during construction and phasing of the replacement of the air handling units is required such that only one of the floors in the building is being worked on a time. Building occupants can be moved temporarily when overhead work is required near their workspace due to installation work in the ceiling. Any work that will require loss of cooling for an extended period of time (one week or more) shall be performed during November through April to avoid the hottest months of the year.

The existing air handling units were installed in 2002, and there is a possibility of asbestos containing materials in the building. Inspection and care shall be taken by the Contractor per environmental requirements.

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Ceiling and walls disturbed as part of the mechanical/electrical work shall be repaired and painted to match existing finish. See paragraph 5-5 for access panel requirements.

5-7 Controls

Each space(s) served by a VAV box shall have a wall mounted thermostat to control the temperature by modulating the air flow to the space(s). The wall mounted thermostat wiring can utilize wire molding. Each of the air handling units shall have a fan controlled by a variable frequency drive. The airflow shall be varied using a duct pressure sensor located 2/3rd of the distance from the fan in the duct path with the greatest static pressure loss.

The chilled water control valves shall modulate the flow of chilled water to provide a constant supply air temperature of 12.7 C at the discharge of the cooling coil. Supply air temperature sensors within the AHU’s are required for this purpose.

Winter Mode - Camp Foster maintenance shuts down the chiller serving the building in the winter months. During periods when the chilled water system is shut off, the air handling units shall provide the minimum outside air flows to each space per paragraph 5-4. Air flow measuring stations shall be used at the outdoor air intake to each air handler. Based on the measured outdoor air intake, the return air dampers at the air handling units shall modulate closed to reduce the return air to the minimum required for mixing and to ensure the minimum outdoor air intake is achieved when the units are in winter mode. The minimum VAV supply air flow rates shall be determined by the AHU VFD minimum speed requirement and the VAV terminal unit minimum flow settings to provide stable performance in the winter mode. The design shall also take into account the existing ventilation exhaust rates to provide a slightly pressurized (5%) or neutral building pressure.

Reference UFGS specification 23 09 93 paragraph 3.3.1 for cooling only VAV box control sequences of operation. Reference paragraph 3.2.9 of the same specification for VAV air handling unit sequences of operation.

Provide HVAC emergency shutoff switches for the new AHU's in accordance with UFC 4-010-01, Chapter 3-19 Emergency Air Distribution Shutoff.

Low voltage (24V or less) plenum rated control cables may be installed without conduit in the space above the ceiling.

5-8 Detailed Specification

During the design stage, submit UFGS specifications to specify the quality, characteristics, installation procedures and testing requirements for all applicable sections. PDF copies of these specifications can be found online at: http://www.wbdg.org/ffc/dod/unified-facilities-guide-specifications-ufgs.

Some of the following specification sections may apply specification section include but not limited to:

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a. UFGS 23 00 00 Air Supply, Distribution, Ventilation Air Exhaust System

b. UFGS 23 07 00 Thermal Insulation for Mechanical Systems

c. UFGS 23 05 93 Testing, Adjusting, and Balancing for HVAC

d. UFGS 23 09 23.02 BacNet Direct Digital Control Systems for HVAC

e. UFGS 23 09 53.00 20 Space Temperature Control Systems

f. UFGS 23 09 93 Sequences Of Operation For HVAC Control

g. UFGS 23 37 13.00 40 Diffusers, Registers and Grills

h. UFGS 23 73 13.00 40 Modular Indoor Central-Station Air Handling

Units

End of CHAPTER 5

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W912HV-20-R-0011- SECTION 01 11 00-A - SOW CHAPTER 6-1

CHAPTER 6

ELECTRICAL ENGINEERING

6-1 Design Goals and Objectives

The main objective of this project is to provide a new replacement HVAC systems. Modify the existing electrical system to allow the installation of new air handling units, variable frequency drives (VFDs), duct smoke detectors and associated electrical system auxiliaries. New electrical distribution system for HVAC systems shall also be designed to protect from corrosive environments and typhoons. This will provide a reliable electrical power system with longer service life. The project shall maximize the design quality and optimize operational functions and system reliability.

The work includes, but is not limited to installation of new enclosure cabinets, circuit breakers, VFDs, junction boxes, disconnect switches, smoke detectors, conduits, wirings, fittings, and associated accessories.

The electrical distribution system shall be designed in accordance with the applicable standards contained in the design criteria listed in Section 9-2. Where the requirements of the standards and the requirements defined herein disagree, the more stringent ones shall apply. JIS and JCS standards included in Section 6-2 may be used in lieu of the applicable standards referred to in this section and in the UFGS guide specifications.

6-1.1 Design and work requirements:

a. Apply 200V class voltage system (208V):

1. Remove existing electrical power wirings, conduits, associated fittings and accessories associated with mechanical scope of work.

2. Remove existing control wirings associated with new mechanical scope of work.

3. Remove disconnect switches and circuit breakers associated with existing Air Handling Units (3 EA) to be demolished as part of mechanical work.

4. Provide new heavy duty type safety disconnect switch or an enclosed circuit breaker for AHUs in accordance with NEC

440.21. Provide NEMA 1 208V 3P variable frequency drives (VFD) to control the motors associated with AHUs. Locate disconnect switches within sight of the HVAC equipment in accordance with NEC 440.14. Provide NEMA 3 or lower rated disconnect switches per NEC code for indoor locations.

5. Provide new electrical power wirings, conduits, pull-boxes, associated fittings and accessories. Replace upstream breakers in panelboards naming ‘P-1’, ‘P-2’ and ‘P-3’ associated with AHUs loads.

6. Provide new electrical power junction boxes and wiring for

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VAV devices. Utilize panelboards ‘1L-A’, ‘2L-A’, and ‘3L-A’.

7. Provide duct smoke detectors for AHUs.

8. Provide new electrical power junction boxes and wirings for electrical reheat coils (3EA). Coordinate with mechanical discipline for exact location and power requirements.

9. New electrical power distribution system shall be coordinated with the manufacturer recommendations for mechanical equipment. Overcurrent protection size and circuit ampacity shall be per equipment manufacturer requirements.

b. Metallic materials shall be protected against corrosion. All enclosures, cabinets, and boxes exposed to the weather shall be NEMA 4X, Type 316 stainless steel.

c. Provide grounding system for all new equipment and devices.

d. All items required to be removed shall be removed. No items including buried conduits and pipes shall be abandoned.

e. Contractor is required to conduct detailed site investigation and perform measurements of the existing electrical system to adequately assess site conditions.

f. Replace all existing power cables of the AHU system located between the circuit breaker and the equipment.

6-1.2 Other Requirements, Consideration and Background

a. Contractor shall provide training to Government maintenance personnel on the programming, operation and maintenance of the new AHU system. Training shall include trouble shooting and periodic preventive maintenance required for the new equipment. Spare parts list needed for maintenance as recommended by the manufacturer shall also be provided by the Contractor. Training shall be conducted by the manufacturer’s authorized representative. Training may use video both in English and Japanese.

b. Scheduled electrical outages shall be kept to a minimum, outages exceeding 8 hours shall require a temporary emergency generator to maintain power to the facility. Contractor shall do all work that will not require power outage initially. Power outages shall be carefully coordinated and scheduled to accommodate the user’s needs.

c. Before installing any wires or conduits, the Contractor shall obtain the exact equipment requirements and shall install wires, conduits, circuit breakers (or disconnect switches), and other items of the correct size for equipment actually installed.

d. Electrical system shall include all necessary devices, accessories and miscellaneous items required for a complete operating system even though each item or process is not specifically mentioned or described. Electrical system shall be complete and ready for

W912HV-20-R-0011- SECTION 01 11 00-A - SOW CHAPTER 6-3

operation.

6-2 Applicable Codes and Standards

Electrical design criteria and guidance are contained in the following documents. Editions that are current at the date of issue of the RFP shall apply.

6-2.1 Government Standards:

a. Unified Facility Guide Specifications (UFGS):

b. Unified Facilities Criteria:

UFC 3-400-05N Tropical Engineering

UFC 3-501-01 Electrical Engineering

UFC 3-520-01 Interior Electrical Systems

UFC 3-550-01 Exterior Electrical Power Distribution

UFC 3-560-01 Electrical Safety, O&M

6-2.2 Industry Standards and Codes:

a. National Fire Protection Association:

NFPA 70 National Electrical Code

NFPA 70E Standard for Electrical Safety in Workplace

NFPA 101 Life Safety Code

b. Institute of Electrical & Electronics Engineers:

IEEE C2 National Electrical Safety Code

6-2.3 Japanese Cable Makers’ Association Standard (JCS):

JCS 1226 Annealed Copper Strand Conductors

JCS 3416 600V Flame Retardant Polyethylene Insulated Wires, EM-IE

JCS 4418 600V Flame Retardant Polyethylene Sheathed Cables, EM-CE

6-2.4 Japanese Industrial Standard (JIS):

JIS C 2336 Pressure-Sensitive Adhesive Polyvinyl Chloride Tapes for Electrical Purposes

JIS C 2804 Compression Terminals

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JIS C 2805 Crimp-Type Terminal Lugs for Copper Conductors

JIS C 2806 Non-Insulated Crimp-Type Sleeves for Copper Conductors

JIS C 2807 Insulated Closed-End Connectors

JIS C 3102 Annealed Copper Wires for Electrical Purposes

JIS C 3105 Hard-Drawn Copper Stranded Conductors

JIS C 3362 600 V Cross-linked polyethylene insulated cables

JIS C 3605 600V Polyethylene insulated cables

JIS C 3612 600V Polyvinyl chloride insulated and sheathed cables

JIS C 8305 Rigid Steel Conduits

JIS C 8309 Flexible Metal Conduits

JIS C 8330 Fittings for Rigid Metal Conduits

JIS C 8350 Fittings for Flexible Metal Conduits

JIS C 8340 Boxes and Box Covers for Rigid Metal Conduits

JIS C 8430 Unplasticized Polyvinyl Chloride (UPVC) Conduits

JIS C 8432 Fittings of Unplasticized Polyvinyl Chloride (UPVC)

Conduits

6-3 Electrical Distribution System

6-3.1 General:

The electrical distribution system modification shall be limited to the mechanical scope of work.

a. Electrical System: Refer to the as-built electrical distribution single line diagrams, site plans, and transformer details.

b. Ducts and Conductors:

c. All low voltage conductors shall be 600 volts, type THWN, XHHW or

RHW. All busses shall be copper.

d. Utility Outages: The Contractor shall initiate requests for outages no less than 30 calendar days prior to any interruption of service in the existing electrical system. Written requests shall be forwarded to the Contracting Officer. The Contractor shall submit detailed plan with an outline of the equipment, duration, timeframe and summary of work involved for the required outage. Each outage shall be coordinated in detail with the appropriate/appointed

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government representatives. Anticipated/agreed upon parameters for each outage shall be summarized in writing and submitted for government approval. Required participation of on-site government maintenance personnel shall also be identified in a summary report.

6-3.2 Grounding

All exposed non-current carrying metallic parts of electrical equipment, metallic raceway systems, grounding conductors and the neutral conductor of the wirings system shall be grounded, except where specifically indicated otherwise. The ground connection shall be made as required by Article 250 of the NEC. Where ground rods are required they shall be 19 mm by 3000 mm copper-clad steel driven so the top is 600 mm below grade. Rods shall be tested for compliance with NEC ground resistance requirements prior to connection. Resistance to solid earth ground shall not exceed 25 ohms.

6-3.3 Exterior Enclosures: N/A.

6-3.4 Locks

All disconnect switches shall be provided with provisions for padlocking.

All panelboards shall be provided with lockable cover as per manufacturer’s standard.

6-3.5 Nameplates

Each panelboard, enclosed circuit breaker, disconnect switch, etc., shall be identified with a laminated phenolic plastic nameplate. Each secondary feeder shall be identified with a fiber or a non-ferrous metal tag.

6-4 Design Calculations

In addition to Section 01 33 16, DESIGN AFTER AWARD, the Offeror shall provide the design to include, as a minimum, the calculations of the following.

a. Load Analysis to include connected and estimated demand. Separate loads by categories such as AHU, VAV, etc.

b. Diagrams: Complete one line diagram shall be provided with calculations of available short circuit currents at transformer and all panelboards.

c. Provide complete panelboard schedules (in English) for modified panelboards.

d. Voltage Drops: Provide voltage drop calculations for all new or modified electrical loads such as AHU, VAV, etc. Per UFC 3-501-01, paragraph 3-2.7, feeder conductors shall be sized to limit voltage drop to 2% maximum at the circuit’s rated capacity and branch circuits shall be sized to limit the voltage drop to 3% maximum at circuit’s rated capacity.

e. Demand Loads: Demand load calculation shall be provided, including

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catalog cuts of the electrical data for the mechanical equipment and other electrical equipment selected.

f. Short Circuit Analysis: Provide complete short circuit analysis.

Ensure all equipment shall be rated for available fault current.

6-5 Materials and Equipment

All materials and equipment shall be the standard catalogued products of manufacturers regularly engaged in the production of such equipment and material, and shall be the manufacturer’s latest design. All equipment and material shall conform to the requirements of American National Standards Institute (ANSI), American Society of Testing and Materials (ASTM), National Electrical Manufacturer’s Association (NEMA), National Fire Protection Association (NFPA), Japanese Industrial Standards (JIS) or other national trade association as applicable. Where standards exist, materials and equipment shall bear the label and be listed by Underwriters Laboratories, Inc. (UL) or other recognized testing organization.

6-5.1 Space Requirements

Electrical equipment space and clearances shall be provided for all electrical equipment as required by codes. In addition, the Contractor shall design and coordinate location to consider factors such as ease of maintenance, vicinity to loads being served, accessibility and future expansion.

6-5.2 Conduit and Wirings:

a. All conduits in the mechanical room shall be exposed.

1. Exterior/exposed conduit shall be rigid steel conduit with corrosion paint. Flexible metal conduit can be used, limited to 6ft length. Use liquid tight flexible metal conduit in damp and wet location.

2. Electrical metallic tubing (EMT) will not be installed in damp or wet locations. EMT may be installed only in areas not exposed to the detrimental effects of the weather and within buildings.

3. No conduit system will be installed horizontally within concrete slabs-on-grade. For slab-on-grade construction, horizontal runs of rigid plastic conduit will be installed below floor slab. Conduit passing vertically through slabs-on-grade will be PVC coated rigid steel.

4. Rigid plastic conduits used in building construction will be restricted as described in the current editions of the National Electrical Code and UFC 3-501-01.

b. Wirings: Wirings shall be copper and shall be run in conduit. Use

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solid bare copper wire for sizes No. 8 AWG and smaller diameter, and Class B, stranded bare copper wire for sizes No. 6 AWG and larger diameter.

1. All low voltage power and lighting wires shall be 600 volts, type THWN, XHHW, or RHW. The size of the conductors shall be determined on the basis copper conductors with 60 degrees

(C) temperature rating for sizes smaller than #1/0 AWG, and 75 degrees C temperature rating for sizes #1/0 AWG and larger in accordance with NEC article 110.14. Aluminum conductors shall not be used. Non-metallic sheathed cables shall not be used. All busses shall be copper.

2. Copper parts shall be used. The Contractor shall ensure that copper shall not be in contact with any other combination of dissimilar metals, which would cause corrosion in moist atmosphere.

6-5.3 Circuit Breakers:

Circuit breakers shall be molded case type and conform to NEMA AB 1 and UL 489 unless specified elsewhere. Circuit breakers shall be suitable for mounting and operating in any position with lugs listed for copper conductors only. For multipole circuit breakers, provide common trip-type with single operating handle. Breaker design shall be such that overload in one pole automatically causes all poles to open.

6-6 Detailed Specifications

During the design stage, submit UFGS specifications to specify the quality, characteristics, installation procedures and testing requirements for all applicable sections. Some of the following specification sections may apply:

UFGS 26 00 00.00 Basic Electrical Materials and Methods UFGS 26 05 00.00 40 Common Work Results for Electrical UFGS 26 05 19.10 10 Insulated Wire and Cable UFGS 26 05 48.00 10 Seismic Protection for Electrical Equipment UFGS 26 05 71.00 40 Low-Voltage Overcurrent Protective Devices UFGS 26 20 00 Interior Distribution System UFGS 26 27 26.00 Wiring Devices UFGS 26 28 16.00 Enclosed Switches and Circuit Breakers

End of CHAPTER 6

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W912HV-20-R-0011- SECTION 01 11 00-A - SOW CHAPTER 7-1

CHAPTER 7

FIRE PROTECTION ENGINEERING

7-1 Not Used

End of CHAPTER 7

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W912HV-20-R-0011- SECTION 01 11 00-A - SOW CHAPTER 8-1

CHAPTER 8

ENVIRONMENTAL REQUIREMENTS

8-1 Environmental Issues

All work shall be conducted in accordance with the Japan Environmental Governing Standards (JEGS 2016), applicable US Federal, Government of Japan, and local regulations, the requirements outlined below, and the referenced specifications. Below is a list of the major environmental aspects associated with the project.

a. Contractor shall assume that all suspect materials contain Lead

Based Paint (LBP) and are Asbestos Containing Materials (ACM).

b. Proper abatement, handling and disposal of asbestos containing materials which may be disturbed as part of the renovation work.

c. Proper handling and disposal of lead containing paint which may be disturbed as part of the renovation work.

8-2 Asbestos

All suspect Asbestos Containing Material (ACM) encountered in this project will be assumed to be ACM. This includes but is not limited to HVAC system insulation (including ducts), pipe insulation, gaskets, floor tile and cove base and its associated adhesive, wallboard, plaster, and ceiling material.

Per the JEGS, ACM shall be defined as any materials containing more than one tenth of one percent (0.1%) asbestos.

The contractor shall abate any ACM that would otherwise be disturbed during the normal work practices required to execute the work included in the scope of this project. ACM which would not be disturbed during normal work practices shall be left in place. The contractor shall dispose of all removed ACM at an approved off-base disposal location. Work shall generally be done in accordance with the standard United Facilities Guide Specification (UFGS) Section 02 82 13.00 10 – Asbestos Abatement and U.S. Army Corps of Engineers (USACE) EP 1110-1-11 – Engineering and Design Asbestos Abatement Guideline Detail Sheets as applicable. These standards shall be revised to incorporate the JEGS, and applicable Government of Japan and local regulations.

The contractor shall designate an Industrial Hygienist (IH)/Private Qualified Person (PQP) to oversee the asbestos work. The IH/PQP shall be a registered Architect, Professional Engineer (licensed) or US Certified Industrial Hygienist who has successfully completed training in, and is accredited under a legitimate Model Accreditation Plan, as described in 40 CFR 763, as a certified Building Inspector, Abatement Worker, Contractor/Supervisor, Management Planner, and Project Designer. The IH/PQP shall also have working knowledge of applicable U.S. Federal and Japanese occupational safety and health regulations for asbestos in construction and shall be considered a competent person as defined in 29 CFR 1926.62. The IH/PQP shall be a third party contractor and have no employee/employer relationship or financial

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relationship with the abatement contractor, which could constitute a conflict of interest.

The contractor’s IH/PQP shall prepare and submit an Asbestos Hazard Abatement Plan (AHAP) for Government approval. The AHAP shall describe the abatement process for each type of ACM to be abated, including containment and control procedures, air monitoring methods, and storage, transportation, and disposal plans. All asbestos work shall be conducted in accordance with the approved

AHAP.

8-3 Lead

There are no lead paint test results available for this project. For purposes of worker protection and protection of adjacent areas, the contractor shall assume that all painted surfaces and coatings contain lead. The contractor shall use appropriate engineering controls, best management practices, and personal protective equipment to manage any lead hazards to the contractor’s workers, the general public, and the environment when disturbing any painted surfaces. For disposal purposes, the Contractor shall assume that all painted items that will be disposed of due to the requirements of this project, is Lead Based Paint. All work shall generally be conducted in accordance with UFGS Section 02 83 13.00 20 – Lead in Construction as applicable. This standard shall be revised to incorporate the JEGS, and applicable Government of Japan, and local regulations.

8-4 Detailed Specifications

During the design stage, submit UFGS specifications to specify the quality, characteristics, installation procedures and testing requirements for all applicable sections. In regards to Lead and Asbestos, the following division 02 specification sections will apply:

a. UFGS 02 82 13.00 10 Asbestos Abatement

b. UFGS 02 82 13.00 20 Lead in Construction

The contractor shall request a copy of the template for these two specification sections that has been modified for projects here in Japan.

Contact Randy Itamoto at DSN 263-8072 for the copies of the template specification sections.

End of CHAPTER 8

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