Solicitation Attachment 7 - Design Narrative.pdf

Basis of Design

Part II: Design Narrative Replace HVAC Base Wide Stanly County North Carolina Air National Guard – 145th Airlift Wing

Type B-3 Submittal – Final Design

New London, North Carolina February 2020

National Guard Bureau Contract W9133L-15-D-0004 Task Order W91242-18-F-0130 Project Number WEFM 142600 https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwi4pfuVvLPeAhUkzoMKHf0JDRYQjRx6BAgBEAU&url=https://en.wikipedia.org/wiki/Air_National_Guard&psig=AOvVaw1e7yx33ETEV0Am829IvgMZ&ust=1541171166529076

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NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative Contents i

1 Introduction

1.1 Project Background

1.2 Project Scope

1.3 Project Phasing

2 Design Narrative

2.1 Overall Design Narrative

2.2 Building 1

2.3 Building 3

2.4 Building 4

2.5 Building 6

2.6 Building 8

2.7 Building 12

2.8 Building 16

2.9 Building 30

2.10 Building 50

2.11 Building 51

2.12 Building 54

2.13 Building 60

2.14 Building 75

2.15 Building 77

2.16 Building 81

2.17 Camp Troop

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative ii

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative Introduction

1 Introduction This Design Analysis supports the development of a conceptual design to provide repair and upgrades to the HVAC systems base wide with the primary goal to eliminate all of the aging non-compliant R-22 refrigerant systems and install necessary smart meters on designated facilities in accordance with Air National Guard (ANG) guidance. It is further intended to demonstrate an understanding of the project concept and to provide information for estimating the cost of the project. This report was prepared by HDR Engineering, Inc. (HDR) for the North Carolina Air National Guard 145th Airlift Wing (AW), under contract W9133L-15-D-0004, Task Order W91242-18-F-0130.

1.1 Project Background

Stanly County Air National Guard Station (ANGS) is a military base located around the Stanly County Airport in North Carolina and is home to multiple units that perform various Air Force Support missions. The 145th AW unit is converting to the C-17 aircraft in support of operations in the United States and overseas, fulfilling a wide range of operational missions in both peace and war situations.

The 145th AW requires facilities that are adequately sized, configured, and conditioned to support the functions in various facilities that provide direct and indirect support to the missions.

The air-conditioning and chiller systems are required to be energy efficient and maintainable to provide the proper environment to meet the various mission needs. The ANG is required to comply or exceed all environmental mandates associated with the phase out of hydro chlorofluorocarbon (HCFC). A fully operational smart meter monitoring system is required by 2020 to meet Department of Defense (DoD) guidance. The remaining air conditioners have either been upgraded or are programmed to be upgraded as part of another facility specific upgrade project. Programmed local sustainment, restoration, and modernization funding needed to repair these systems is insufficient.

1.2 Project Scope

This project requires the replacement of all existing R-22 HVAC equipment base wide.

Replacement systems shall be designed to meet or exceed UFC1-200-02 High Performance and Sustainable Building Requirements dated December 2016, which requires the optimization of energy efficiency and the use of ASRAE 90.1 (2013) minimum criteria. Where feasible these minimum requirements should be exceeded to take advantage of higher seasonal energy efficiency ratio (SEER) and energy efficiency ratio (EER) equipment.

Equipment to be replaced includes split systems (heat pumps and furnaces), as well as package roof top units (RTUs). Unit sizes vary from 1.5 tons to 20 tons. In the case where the condensing unit or heat pump is to be replaced as part of the split system, the matching air handler/furnace will be replaced as well. The existing cooling coils were originally designed for R-22 refrigerant, which has different design pressure and properties than the new R-410 refrigerant that will be installed. In order for the system to operate at the high efficiency as designed, the air side equipment (which houses the cooling coil) requires replacement as well.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative Design Narrative

The existing smart meters and reporting system shall be expanded to include the 23 electrical and natural gas/propane smart meters for the designated buildings at Stanly County ANGS.

Smart meters are needed to meet a Presidential mandate to provide Energy Dash Board monitoring for utilities NGB wide. Where no meters exist in a facility a Building Automation System (BAS) controller shall be designed into the facility. The current base standard for HVAC controls to be matched is Alerton. The basis of design must be integrated to the existing Alerton graphics and energy dashboard system.

1.3 Project Phasing

The existing site and facilities will be occupied during construction of the planned work.

The contractor shall determine phasing requirements as it relates to maintaining building operations, coordination with facility personnel, and protection of stored material. An estimated construction schedule is included with this submittal. Coordination between the contractor and Government is required for this work.

2 Design Narrative The design intent for the project is to replace all of the aging, non-compliant R-22 refrigerant systems and install necessary smart meters on designated facilities that is compatible with current Air National Guard Engineering Technical Letters (ANGETLs), Unified Facilities Criteria (UFCs), codes, DoD and Air Force standards.

2.1 Overall Design Narrative

2.1.1 Architectural

The new mechanical work may require new plumbing and refrigerant lines to penetrate exterior walls. These penetrations will typically be 2 inches in diameter or less and will be provided by core drilling through the exterior wall assembly. Spray foam sealant will be provided around the perimeter of each pipe penetration.

Any existing roof penetrations and ground mounted concrete slabs shall be reused. Any damages to existing systems shall be repaired to match existing.

2.1.2 Mechanical

All heating, ventilation, air conditioning, and plumbing will be designed in accordance with the 2015 International Building Codes (IBC), UFC Series, and ANG design standards.

Mechanical systems will be designed in accordance with ANGETLs, Technical Orders (TOs) and other applicable documents. This shall include applicable codes, industry standards and practical engineering methods. The mechanical design is based on the following criteria:

• Performance factors that include efficiency, simplicity, durability, and functionality.

• Cost factors that include first costs, long-term operational costs, and maintenance costs.

• Design factors that influence and benefit acquisition of points towards desired

Leadership in Energy and Environmental Design (LEED) points.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

High-quality, energy efficient equipment will be selected with life-cycle costs in mind. Control systems will be designed to provide the required functionality, system control and monitoring, and will maximize energy conservation within operational constraints. The current base standard for HVAC controls to be matched is Alerton.

2.1.3 Electrical

For buildings that require an HVAC replacement, existing equipment will be replaced with a new, high-efficiency equivalent during this project. Since the new unit’s electrical requirements will match the existing equipment electrical requirements, the new equipment will be wired to the existing circuit breaker that previously served the existing equipment. Note that the power design requirements, and the connection requirements for the new equipment shall be coordinated with applicable codes such as: the National Electrical Code (NEC), applicable UFC requirements, the local authority having jurisdiction (AHJ), applicable National Fire and Protection Association (NFPA) codes, and applicable UL standards. In instances where the system, its boxes, and/or disconnects, etc. are located outdoors, the equipment to be provided will be NEMA 4X rated. Where the equipment, its boxes, and/or disconnects, etc. are located indoors in non-hazardous areas, the equipment to be provided will be NEMA 1 rated. All electrical wiring will be copper with THWN/THHN insulation, and will be routed in rigid conduit (to include electrical metallic tubing, rigid galvanized steel, and flexible steel, water tight), unless conditions dictate otherwise. Conduits located within hazardous areas, and up to 50 feet outside of the hazardous area, will have seal fittings to minimize the passage of gases to and from electrical equipment. Exposed conduits routed in wet, corrosive, and hazardous areas will be PVC coated rigid galvanized steel. Conduits routed underground shall be rigid PVC.

Smart metering (electric and natural gas) will be provided to meet the Presidential mandate to provide Energy Dash Board monitoring for utilities. The design and selection of these meters will be coordinated with the facility's owner rep to ensure that the meters selected are compatible with the existing system.

2.2 Building 1

Building 1 is the Air Support Operations Squadron (ASOS) building. It is a single-story, concrete block building with a flat, thermoplastic polyolefin (TPO) roof. The building has undergone multiple renovations/expansions over time so there are several elevation changes in the floor plan. The building consists mostly of offices and conference rooms, but there is also a double height maintenance bay area. Building 1 is approximately 18,800 SF based on a recent addition.

2.2.1 Existing HVAC Design and Systems

Building 1 is conditioned by various types of HVAC systems. Each system serves a different portion of the building. There are a combination of RTUs, split systems with propane furnaces, mini split systems, and a packaged room-top unit used to condition the facility.

There are a total of five RTUs all serving office space in different portions of the building. Unit sizes include: RTU-1 & RTU-2 are 4-ton units, RTU-3 is a 5-ton-unit, RTU-4 is an 8.5-ton unit, and RTU-5 is a 12.5-ton unit. RTUs 1 through 4 are all ultra-high efficiency, variable volume

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

Lennox units. The Carrier 12.5-ton unit is a standard efficiency, dual stage cooling unit. All units were installed in 2011-2012.

There are a total of four Trane split systems serving the building that were installed in 2004- 2005. All of the condensing units are installed on the roof and the furnaces are located in a designated mechanical room. There are three 6-ton systems (CU-1, CU-2, CU-3) and one 3.5-ton system (CU-4). Furnaces are 92 percent efficient and come with a two-stage heating and four-stage blower.

The mini split and multi split systems have been recently added and serve communications closets and small office spaces.

In Room 135, a Carrier 2-ton packaged unit was installed above the dropped acoustical tile ceiling. It was installed at the time of a renovation and was ultimately chosen based on the interior location of the room. It was installed in 2011-2012.

2.2.2 HVAC Design Work

A total of four split systems with propane fired furnaces will be replaced. All are Trane systems and there are three 6-ton systems and one 3.5-ton system. There is also a 2-ton packaged unit installed above the ceiling in the RAD room (Room 135) that will be replaced with a traditional split system. There are no known code issues with the equipment or the current operation of the HVAC system capacities or existing building controls.

• Install of the new furnaces (GF-1 thru GF-4) and the new split system, and perform a building wide test and air balance (TAB) analysis. This report will identify potential air flow issues, setpoint control, and fan control issues for the entire building.

• Provide and install new BAS controller and link to new and existing HVAC equipment.

This allows base maintenance personnel to diagnose operating issues and set building temperature set points.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

• Perform a complete duct cleaning and inspection. All supply ductwork (at a minimum) shall be installed with minimum 1-inch thick insulation.

• Confirm that all temperature sensors within the building are installed in the appropriate locations. Ideal location would be next to the entry way of offices and/or next to return air grilles. If multiple areas are conditioned by the same box, locate the temperature sensor in the area that is more critical to maintain space comfort. It is not recommended for sensors to be installed near exterior walls, in areas of direct sun exposure, directly under a supply diffuser, or behind any equipment or furniture.

2.2.3 Electrical Design

Work at this building will consist of installing and connecting a propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

2.3 Building 3

Building 3 is the Composite Deployment Support facility.

2.3.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.3.2 Electrical Design

Work at this building will consist of installing and connecting an electrical and propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.4 Building 4

Building 4 is the Dining Facilities building. It is a single story brick and concrete block building with a metal pitched roof. Building 4 is approximately 4,160 SF and consists of a large dining hall with a kitchen and support areas. It also has a small office and restrooms.

2.4.1 Existing HVAC Design and Systems

Building 4 is currently conditioned by two Trane split systems with propane furnaces. The furnaces are equipped with variable speed supply fans and two stage heat. Both of the systems use R-22 refrigerant and have a 6-ton cooling capacity. The condensing units are ground mounted just outside of the mechanical room where the furnaces are installed. There are also two gas-fired (propane) furnaces (no cooling) that provide heating and ventilation make-up air to the kitchen area.

There is also a single, 1-ton Trane packaged terminal air conditioner unit that serves the office space.

2.4.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 4. There is also no issue with the HVAC system capacities or existing building controls. In general, after the scheduled replacement of the split systems and associated furnaces, the HVAC systems will be in good working condition.

• Replace the other two furnace units that serve the kitchen space as they are nearing the end of their useful life. (Trane XV90, high efficiency, variable speed, two stage units)

• Provide a new BACnet router, temperature sensor, and door switches. New building router shall communicate with the main BAS controller located in Building 1.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.4.3 Electrical Design

Work at this building will consist of installing and connecting an electrical and propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.5 Building 6

Building 6 is a single-story metal siding building with concrete block base. Building 6 is predominantly used a storage space.

2.5.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.5.2 Electrical Design

Work in this building will consist of installing and connecting an electrical and propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.6 Building 8

Building 8 is the Vehicle Maintenance Facility. The building is approximately 12,577 SF and consists of several vehicle maintenance bays, a paint shop, an administrative area with offices and storage, and a large classroom/training room area. It is a double height, single story building made of concrete block and brick with a pitched roof. There are several large roll-up doors to allow access into the maintenance bays.

2.6.1 Existing HVAC Design and Systems

Building 8 is currently heated and ventilated only in the maintenance bays and shop areas of the building. The administrative and classroom portion of the building are conditioned by a combination of four split system with propane furnaces. The system sizes include: one 2-ton, one 2.5-ton, and two 3-5 ton systems. The condensing units are ground mounted just outside of the mechanical room where all of the furnaces are installed.

2.6.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 8. In general, after the scheduled replacement of the split systems, the HVAC equipment will be new.

• Provide a new BACnet router, temperature sensor, and door switches. New building router shall communicate with the main BAS controller located in Building 3.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.6.3 Electrical Design

Work at this building will consist of installing and connecting an electrical and propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

2.7 Building 12

Building 12 is the Composite Training facility, with a total building area of 38,828 SF. The facility is a large single and two story brick building with a flat EPDM roof. It consists of a combination of spaces including but not limited to: offices, conference rooms, training rooms, and a large auditorium space. This building appears to have had some additions/renovations over time due to the change in elevations and facades.

2.7.1 Existing HVAC Design and Systems

Building 12 is conditioned by a total of 13 Carrier gas packaged RTUs ranging from 2-tons to 10-tons cooling capacity. All units are constant volume and serve a designated area within the building and are controlled by a local thermostat. RTU-7 and RTU-8 serve the large auditorium space. They each have an associated energy recovery ventilator (ERV). All RTUs are R-22 machines that were installed in 2008-2009.

There are also a group of five split systems with propane furnaces. These units also serve individual spaces within the building and are controlled by their own thermostat. The condensing units are installed on the second story roof of the southwest wing and the furnaces are all installed inside on the mezzanine.

There are also several mini split systems that serve communications and information technology closets located throughout the building.

2.7.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 12. There is also no issue with HVAC system capacities or existing building controls. Overall, after the replacement of the R-22 equipment and their associated furnaces, the heating and cooling equipment, in general, will be new and in good working condition.

• After the installation of the new roof top equipment and split systems with furnaces, perform a building wide TAB analysis. This report will identify potential air flow issues, setpoint control, and fan control issues for the entire building. This evaluation would be helpful in discovering potential issues/leaks with the duct system as well.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

• Perform a complete duct cleaning and inspection. All supply ductwork shall be installed with minimum 1-inch thick insulation.

• Confirm that all temperature sensors within the building are installed in the appropriate locations. Ideal location would be next to the entry way of offices and/or next to return air grilles. If multiple areas are conditioned by the same box, locate the temperature sensor in the area that is more critical to maintain space comfort. It is not recommended for sensors to be installed near exterior walls, in areas of direct sun exposure, directly under a supply diffuser, or behind any equipment or furniture.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

2.7.3 Electrical Design

Work at this building will consist of installing and connecting a propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.8 Building 16

Building 16 the DSI Communications Facility that consists of a total building area of 939 SF. It is a small concrete block building with a stone veneer and a flat roof. The building is separated into two different spaces.

2.8.1 Existing HVAC Design and Systems

Building 16 is conditioned by two wall-mounted, vertical packaged heat pumps. The units are mounted on the exterior wall and controlled by thermostats located in each space. Each unit (1.5-ton and 2-ton unit) serves one half of the building.

2.8.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 16. There is also no issue with HVAC system capacities or existing building controls. Overall, after the replacement of the R-22 equipment, the heating and cooling equipment serving building 16 will be new and in good working condition.

• Provide a new BACnet router, temperature sensor, and thermostat VLC/D. New building router shall be connected to the main BAS controller located in Building 3.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.9 Building 30

Building 30 is the RAPCON facility with a total building area of 1,238 SF. The facility consists of some small perimeter offices and a main open area. It mainly houses air traffic control and maintenance personnel. It is an entirely brick building construction on slab with a sloped metal roof.

2.9.1 Existing HVAC Design and Systems

The entire building is heated and cooled by two split system heat pumps. There is a 2.5-ton system and a 3-ton system. Both heat pumps units are ground mounted and the air handlers are installed inside the mechanical room. They are controlled by their own individual wall mounted thermostat.

There is also a mini split sir conditioned that was recently installed during a project to condition their communications closets.

2.9.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 30. All ductwork appeared to be insulated and thermostats were in ideal locations. In general, after the scheduled replacement of the split systems, all HVAC equipment will be new.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

• Provide and Install new BAS controller and link to new and existing HVAC equipment.

This allows base maintenance personnel to diagnose operating issues and set building temperature set points.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.9.3 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.10 Building 50

Building 50 is the RTS Classroom. It is a single-story, pre-fabricated metal siding building with a metal roof. Building 50 consists of predominantly administrative office and classroom space.

2.10.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.10.2 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.11 Building 51

Building 51 is the RTS shower and latrine building. It is a single-story, pre-fabricated metal siding building with a metal roof. Building 51 consists of restroom and shower facilities that serves the camp troop residential area.

2.11.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.11.2 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.12 Building 54

Building 54 is the Command and Control facility. It is a single story, 1,592 SF concrete block building with a sloped shingled roof. The building consists of some small office spaces and two

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative training rooms along the west wall. There is also a small storage area, janitor’s closet, and kitchenette space in the corridor.

2.12.1 Existing HVAC Design and Systems

Building 54 is currently conditioned by two Trane split system heat pumps that were installed in 1999-2000. The condensing units are mounted on grade at the rear of the building and both of the air handlers are installed above the ceiling in an attic type space along the center of the building. There is a 1.5-ton and 4-ton system, and both systems utilize R-22 refrigerant.

It was reported by building personnel that they have issues maintaining temperature set point in the front office area during the cooling season. Based on site evaluation, the building was zoned appropriately and this may be the result of another issue.

2.12.2 HVAC Design Work

There are no known code issues with the HVAC equipment in Building 54. There is also no issue with the existing building controls. Overall, after the replacement of the R-22 split systems, the heating and cooling equipment in general will be in new condition. See below for the list of recommendations:

• Perform heating and cooling load calculations to determine if existing 1.5-unit and 4-ton units are adequate for the space.

o If the 4-ton unit is adequately sized for the peak load and full occupancy, provide with variable capacity and variable airflow air handler. This would allow the system to adjust to the internal loads, increasing run times, and help to reduce humidity in the space.

• Remove filter from the unit and provide with a filtered return grille to eliminate maintenance staff from having to access through the attic.

• Provide and install new BAS controller and link to new and existing HVAC equipment.

This allows base maintenance personnel to diagnose operating issues and set building temperature set points.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

• After the installation of the new systems with furnaces, perform a building wide TAB analysis. This report will identify potential air flow issues, setpoint control, and fan control issues for the entire building. This evaluation would be helpful in discovering potential issues/leaks with the duct system as well.

• Perform a complete duct cleaning and inspection. All supply ductwork shall be installed with minimum 1-inch thick insulation.

Confirm that all temperature sensors within the building are installed in the appropriate locations. Ideal location would be next to the entry way of offices and/or next to return air grilles.

It is not recommended for sensors to be installed near exterior walls, in areas of direct sun exposure, directly under a supply diffuser, or behind any equipment or furniture.

2.12.3 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

Force Requirement. Meters shall be compatible with the existing system.

2.13 Building 60

Building 60 is the Control Tower facility that includes about 2,569 SF. The control tower is responsible for monitoring aircraft in and around the Stanly County Airport. It consists of four stories not including the cab. It is an entirely concrete block building that consists of an electrical room, a server room, an office/storage room, and the control cab space.

2.13.1 Existing HVAC Design and Systems

The building is conditioned by a combination of four split system heat pump units. There are two 6-ton units (HP-2 and HP-3), a 1.5-ton system (HP-1), and mini split system. The 1.5-ton system (AH-1) serves the electrical room on the first floor and the office/storage space while the 6-ton units (AH-2 and AH-3) serve the control cab. The mini split system with wall mounted air handler servers the server room. Fresh air is ducted to the units through wall louvers on the face of the building.

2.13.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 60. In general, after the scheduled replacement of the split systems all HVAC equipment will be new.

• Provide a new BACnet router, temperature sensor, and thermostat VLC/D. New building router shall be connected to the main BAS controller located in Building 54.

• Route new refrigerant lines up along the exterior face of the building to be contained by a gutter painted to match base standards. Existing wall penetrations shall be patched and sealed with like materials to match existing construction.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.13.3 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.14 Building 75

Building 75 is the Power Production and Civil Engineering Maintenance Inspection and Repair Facility (CEMIRT). It is a 5,100 SF concrete block and metal siding building with a slight pitched roof. The facility consists of seven large roll-up doors for vehicle access, a couple of office spaces, and a classroom.

2.14.1 Existing HVAC Design and Systems

Currently the classroom and office spaces are conditioned by a single 3-ton split system heat pump. The heat pump unit is ground mounted and the air handler is installed on the mezzanine

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative and then ducted down into the space below. This is a constant volume, R-22 system that is already scheduled to be replaced as part of the base wide HVAC replacement project.

2.14.2 HVAC Design Work

There are no known code issues with the equipment or the current operation of the HVAC equipment in Building 75. In general, after the scheduled replacement of the split system, the HVAC equipment will be new.

• Provide a new BACnet router, temperature sensor, and door switches. New building router shall be connected to the main BAS controller located in Building 77.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.14.3 Electrical Design

Work in this building will consist of installing and connecting an electrical and propane smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.15 Building 77

Building 77 is the RTS Classroom building. It is a two-story metal building with a metal roof. This building is used for classroom and training space.

2.15.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.15.2 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.16 Building 79

Building 79 is a two-story building located in the Troop Camp.

2.16.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.16.2 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be

Force Requirement. Meters shall be compatible with the existing system.

NC ANG 145th Airlift Wing | Replace HVAC Base Wide Stanly County – Basis of Design Part II: Design Narrative

2.17 Building 80

Building 80 is a two-story building located in the Troop Camp.

2.17.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.17.2 Electrical Design

Work in this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.18 Building 81

Building 81 is a single-story, metal siding building.

2.18.1 HVAC Design Work

There will be no HVAC replacement work performed at this building.

• Provide and install Emergency HVAC Shut-Off switch to be tied into BAS.

2.18.2 Electrical Design

Work at this building will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system.

2.19 Troop Camp

The Troop Camp consists of 16 different buildings used for housing. Each concrete block and wood siding building is approximately 1,000 SF. They are conditioned by a single split system heat pump that are all being replaced under a different project.

2.19.1 HVAC Design Work

There will be no HVAC work performed at these buildings.

2.19.2 Electrical Design

Work at these buildings will consist of installing and connecting an electrical smart meter to provide metering information to the Stanly ANGS. The design and selection of these meters will be coordinated with the COR to ensure that the meters selected meet the current UFC and Air Force Requirement. Meters shall be compatible with the existing system. Two electrical meters will be installed: one at each meter center to serve the troop camp.

HDR Engineering, Inc. of the Carolinas 440 S Church Street, Suite 1000 Charlotte, NC 28202-2075 704.338.6700 NC License F0116 hdrinc.com

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