SEA_USDCH_HVAC_Optimization_SOW_(1_January_2019).doc.docx

Statement of Work HVAC System Optimization Seattle Federal Courthouse, Seattle WA

Scope of Work Heating Ventilating and Air Conditioning Optimization Design-Build Construction Seattle US District Courthouse 700 Stewart Street Seattle, WA 98104 31 January 2019

1. INTRODUCTION

1.1. The Contractor shall design and modify the existing HVAC/R system to create a demand based chilled water system and water-side economizer at the central cooling plant of the Seattle US District Courthouse (Seattle USDCH) building, to increase energy efficiency, while meeting the building’s 24/7/365 cooling requirements, and while providing, when conditions allow, efficient first-stage cooling to the building.

2. GENERAL

2.1. Contractor shall prepare construction performance specifications and engineering solutions that optimize the central cooling plant at the Seattle USDCH. The Contractor shall be responsible for eventual system performance that satisfies energy saving requirements. The Contractor shall be responsible for delivering a Design-Build solution the addresses the following proposed modifications under the Scope of Work.

2.1.1. Plan, design, and construct a water side economizer system in the central cooling plant, along with properly sized heat exchanger, modulating chilled water and condenser water control valves, to utilize the existing condenser water system and cooling towers, and to provide cooling water to the building to satisfy the 24/7/365 cooling load, and cooling to the building when outside air conditions are suitable.

2.1.2. Optimize the facility’s central cooling plant to include the combination of chillers, water side economizer, cooling tower, and chilled water pumping control(s) that will optimize the central cooling plant’s operation and reduce energy consumption. GSA envisions the concept shall vary the chilled water and condenser water loop set-point temperatures, in concert with chiller load capacity control, and chilled water supply speed control to optimize the central cooling plant operation and lower the energy use.

2.1.3. Perform all work as required for this optimization project. Work shall include all required engineering calculations, project management, submittals, preparatory work, scheduling, construction, testing and balancing, commissioning, training, closeout and all other work required to fully complete the design, construction, installation, testing, commissioning and training of the HVAC optimization program at the Seattle USDCH for a complete turnkey project.

2.2. BACKGROUND

2.2.1. Purpose/Statement of Need

The purpose of this project is to reduce the energy consumption of the HVAC systems, correct design issues, and provide better space conditioning for the tenants. The US District Court and various other federal tenants occupy the Seattle USDCH. GSA is responsible for operations and maintenance of the building.

2.2.2. Existing Conditions

2.2.3. The existing central cooling plant has two Trane centrifugal chillers - (1) 500-ton and (1) 1000-ton - that are located in the facility’s basement.

2.2.4. A third heat recovery (jockey) chiller, a 250-ton unit manufactured by Carrier, was added to the central plant in approximately 2009. The heat recovery portion of the jockey chiller was never commissioned; however, the (2) flat-plate heat exchangers, along with the associated piping, pumps and variable frequency drives (VFD) that were all installed as part of that 2009 project, are available for use under this optimization project. One heat exchanger was initially designed to recover heat off of the condenser water loop for zone reheat coils, while the other was intended to provide heating hot water at lower pressure and temperature, for radiant floor heating system. The Contractor shall evaluate and determine the optimal use and configuration of any re-used equipment.

2.2.5. The facility’s air system was designed based on low temperature supply air (42°F), using 38°F chilled water supply. However, due to the existing design issues at the central plant, the chilled water supply temperature during the majority of the cooling hours is higher than design, forcing the air system to work harder than necessary. The air system trends indicate that as a result of this condition, the facility’s air handling units (AHU) are operating as a constant, instead of variable, air volume system.

2.2.6. The current building management (automation) system (BMS; BAS) is Johnson Controls Inc. (JCI) NAE Ver 2.0, except at the central cooling plant which utilizes a Trane Summit controller. The two systems/controllers do not communicate all the necessary system parameters directly with one another. The JCI system has an active discharge air temperature and discharge air pressure reset schedule; however, excessive heating of the supply air temperature has been noticed at the AHUs. The JCI BMS will be upgraded, under a separate contract which will be executed and completed prior to the commissioning tasks of this project. The new JCI controller at the central cooling plant will be the latest version of JCI available. The JCI BMS Upgrade contractor will not optimize the system; they will only update the software and any field components to the latest JCI version. It shall, therefore, be the responsibility of the HVAC Optimization contractor, i.e. the contractor for this Statement of Work, for optimization of the HVAC system, once the JCI BMS has been upgraded.

2.2.7. The secondary system’s main chilled water loads are AHUs serving occupied zones. The 24/7/365 load consists of fan coil units serving IT loads, and the main IT room located on the second floor of the facility. GSA Region 10 personnel estimate that this load consists of approximately 22-tons of cooling. However, the Contractor shall verify this information as part of their scope.

2.2.8. The condenser water pumps are located in the basement near the chillers, and the cooling towers are on the roof of the 20-story office tower. The chillers share a common condenser water supply, off of the main header in the central plant, but have a dedicated constant volume chilled pump.

2.2.9. The chilled water loop is supplied by two variable flow secondary chilled water pumps. The secondary chilled water pump speed is regulated by differential pressure sensors. Location of this sensor is not known.

2.2.10. There are four (4) open cooling towers, all of which are variable speed with the ability to regulate the condenser water supply temperature to the chillers, are located on the roof. There is a bypass line, with an installed modulating valve, between condenser supply and return.

2.2.11. The existing heating system consists of eight (8) Aerco condensing boilers controlled by an Aerco boiler sequence controller. This controller does not communicate all necessary system parameters to the facility’s JCI BAS. Due to issues with this sequence controller, the boilers operate 24/7/365; however, during unoccupied hours and summer time, the boiler loop setpoint is adjusted down to 90°F. Otherwise, the boiler sequence controller will not properly sequence the boilers, nor will it smoothly transition from one boiler to the next to meet the heating load properly.

2.2.12. The heating hot water loop consists of variable primary loop pumps that operate the heating hot water pumps based on differential pressure setpoint, located in the heating hot water plant.

2.2.13. Existing central plant configuration and operation

Currently the central plant is configured and operates as a constant volume primary, variable secondary pumping configuration. Secondary CHWP speed control maintains a differential pressure (dP) setpoint; secondary water flow is monitored (but not controlled) with an Onicon flow meter, with supply and return temperature sensors. Primary pumps are enabled with the associated chiller, CHWS temp sensors are factory installed equipment, and CHW flow is verified using an onboard flow switch on the chiller; there is no exiting primary flow meter. The CHW bypass is a two-way actuated valve with an Onicon flow meter, and a bypass temperature sensor. The existing central plant at the USCH consists of:

Three (3) water cooled chillers

· CH-1 Trane CVHF910

· CH-2 Trane CVHE500 with VFD Retrofit

· CH-3 Carrier 30HXC27 Three (3) constant volume primary pumps

· CHP-1 30hp

· CHP-2 20hp

· CHP-3 10hp Two (2) variable speed secondary chilled water pumps

· CHP-4 100hp

· CHP-5 100hp Four (4) Cooling Towers Evapco Model AT19711 with variable speed fans

· CT-1

· CT-2

· CT-3

· CT-4

Three (3) Condenser water pumps

· CWP-1 Serves CH-1 125hp

· CWP-2 Serves CH-2, CH-3 (variable speed) 75hp

· CWP-3 Serves existing Heat Recovery System (not used) Two (2) Heat Recovery Pumps (8th Floor Fan Room)

· HWP-2 15hp

· HWP-3 15hp Existing Flow Meters

· Secondary CHW Flow

· Bypass Flow

· Existing Temperature Sensors

· Secondary CHWS Temp

· Secondary CHWR Temp

· Secondary CHWR Temp After bypass

· CHW Bypass Temp

· CDWS Temp

· CDWR Temp

· HX-2 HWS Temp

· HX-2 HWR Temp

· HX-3 HWS Temp

· HX-4 HWS Temp Heat Recovery System (8th Floor Fan Room)

· HX-2

· HX-3

3. SCOPE OF SERVICES

The existing building automation system at the central plant and the building is currently being upgraded, under a separate contract action, to the latest version of Johnson Controls Inc. This separate BAS upgrade will be accomplished concurrently with the scope of this project, and the two projects but will be completed in concert with one another. The building’s BAS upgrade contract includes the installation of new Trane AdaptiView controllers on the existing Trane chillers, new MS/TP BACnet controls for existing ancillary equipment, and programming of new and existing Sequence of Operations into the new JCI Metasys system. Contractor for this project shall coordinate with JCI through GSA to ensure compatibility and consistency across the new equipment, controls, and software installed. Bidders for this project shall provide their proposed equipment vendor preference(s) as part of their technical submittal requirements to the RFP.

This scope of work outlines the requirements of the HVAC optimization project, which shall include the implementation of the following:

1. Installation of a 250-ton flat-plate heat exchanger as water side economizer

2. Conversion of the constant flow primary pumping to variable flow

3. Implementation of the Central Plant Optimization program

3.1. Water-Side Economizer Installation

This portion of the scope includes the installation of a new 250-ton waterside economizing plate and frame heat exchanger to serve 24/7/365 IT loads and provide a first stage of cooling for the building when outside air temperatures are suitable. The water side economizer shall utilize the cooling tower(s), and the associated condenser water pumping system to maintain condenser water setpoint, passed through a flat-plate heat exchanger to be installed at the central plant, to provide and maintain chilled water supply temperature to the building.

3.1.1. Provide the design and construction documents for a 250-ton flat-plate heat exchanger, in the central cooling plant of the Seattle courthouse building, to provide cooling water to the 24/7/365 IT loads, and to provide first stage cooling to the building, when outside air temperatures are suitable.

3.1.2. The heat exchanger shall be installed on a 6” concrete pad, at a suitable location in the existing cooling central plant, without impeding maintenance access to the existing chillers and pumps.

3.1.3. Provide pressure and temperature gauges at both the inlet and outlet piping, on both the source (condenser water) and load (chilled water) side of the heat exchanger.

3.1.4. Provide inlet and outlet temperature sensor for input into the building automation system. The temperature sensors shall include supply and return at the inlet and outlet side of the heat exchanger.

3.1.5. Provide automatic isolation valves at both the inlet and outlet sides of the heat exchanger. The control valves shall be tied to building automation system, and be used to isolate both fluid streams automatically, when this system is not in use.

3.1.6. Provide conduit and wire, from the temperatures sensors and isolation valves to the BAS input/output terminals. Coordinate with JCI, as part of the scope of this contract, to terminate the input sensors and the outputs at the BAS input terminal.

3.1.7. Provide and install one Onicon magnetic insertion flow meter with matched supply and return temperature sensors for the new waterside economizer. Pricing shall also include integration into new JCI Metasys system. This includes any wire, conduit, programming, integration and point/trending monitoring of this meter on the front-end. Contractor to provide trending of data points as requested by GSA. The flow meters shall provide input to the BAS for proper control of the chillers, as well as monitoring.

3.1.8. Insulate the new condenser and chilled water piping in the central plant with 2” fiberglass insulation. Additionally, provide 2” fiberglass insulation on all existing condenser water piping, in the central plant that is not presently insulated. The installation of insulation shall include all associated valves, and fittings, and shall be provided with an all-purpose jacket.

3.1.9. Seismic restraints are required for the new equipment and piping. The bidders shall include in their pricing the cost of the restraint design by a licensed professional engineer as well as the installation of necessary restraints. Additionally, all new equipment and piping shall be mounted on or suspended from vibration isolators to reduce the transmission of vibration and mechanically transmitted sound to the building structure. Rigid connections between equipment and the building structure that degrade noise and vibration control will not be permitted. Pre-press as a method of joining is not acceptable on this project, nor are Victaulic fittings. All Carbon steel ASTM A-106B or other process (chilled water) piping must be butt-welded and small-bore copper piping shall be soldered.

3.2. Conversion of the Constant Flow Primary Pumping to Variable Flow This scope includes the necessary equipment and controls required to convert from constant volume primary chilled water (CHW) system to a variable frequency drive (VFD) primary CHW system. This work shall include the installation of new variable speed drives, and new premium efficiency motors on each of the three primary chilled water pumps (CHP-1, 2, & 3), as well as wiring, conduit, supports, controls, and integration into the new JCI Metasys control system. The new VFDs shall be sized per NEC and be suitable to work with pump and motors.

3.2.1. Replace the existing primary chilled water pump-motors with new premium efficiency motors, suitable for operation with a variable frequency drive. Re-align the new pump and the motor using laser technology.

3.2.2. Replace the existing pump motor disconnect switches with new properly sized variable frequency drives (VFD). The new VFDs shall be provided with three-contactor bypass witches. The three-contactor-bypass-switches shall provide the ability to operate the pumps in manual mode, while the drive mechanism is available for repair.

3.2.3. Provide and install grounding rings on all inverter duty motors.

3.2.4. As part of this scope, provide and install automatic control valves, and install controls instrumentation, and variable frequency drives for the primary chilled water pumps on CHP-1, CHP-2, and CHP-3 (30HP, 20HP, and 10HP, respectively). Bidders shall provide GSA with a valve schedule for all new proposed control valves and actuators, with flow rate (gpm), size (in), actuator and Cv rating. Bidders shall provide pricing for both furnishing and installing controls wiring and conduit as necessary to these devices. These devices shall be integrated into the operation of the central plant and the bidders shall seamlessly ensure their operation is consistent with the overall operational intent. These points shall be graphically integrated to the front-end and be capable of being monitored and adjusted by the plant operator. Selection of control valves, instrumentation, and VFDs must be coordinated to ensure consistency within the building and compatibility with the BAS system. New VFDs must be furnished with three-contactor-bypass-switches, and must meet GSA P100 requirements, including but not limited to IEEE 519 harmonics requirements.

3.2.5. Incorporation of software on the new GSA building automation system will require scanning of the software for security vulnerabilities, by GSA IT team. The Contractor shall coordinate all efforts related to this action, through GSA Project Manager.

3.2.6. The application of this program may include modifications to the plant operations, such as converting the constant flow primary/variable flow secondary to variable primary flow system. The Contractor shall be responsible for the design concept, including pump capacity considerations, installation of all necessary components, commissioning, and training of a standalone and fully operational system.

3.2.7. Provide and install one each Onicon magnetic insertion flow meter at the inlet of the Chillers 1, 2 & 3 and at the primary chilled water line with matched on the primary chilled water loop. The location of this flow meter shall be selected in a straight section of the primary chilled water loop, such that if any chiller the primary chilled water flow reading Pricing shall also include integration into new JCI Metasys system. This includes any wire, conduit, programming, integration and point/trending monitoring of this meter on the front-end. Contractor to provide trending of data points as requested by GSA.

3.3. Central Plant Optimization Program

The goal of this project is to achieve maximum energy savings through system optimization. In addition to the work described above, it is imperative to ensure that each piece of equipment, valve, sensor, and flow meter is in good working condition and has been calibrated. As such, this scope of work will require an operational and maintenance assessment, as well as functional and point to point testing. Pre and Post testing and balancing of the waterside systems and a water balance for multiple modes of operation, and establishment and documentation of flow and temperature parameters will be required. The contractor agrees that sensors within the physical plant that are not functional will be replaced in kind as part of their all-inclusive bid.

The existence and location of utilities, piping and mechanical systems are not guaranteed. Before the start of work, the contractor shall field verify existing conditions pertaining to this work and these changes shall be reflected in contractor’s price prior to the start of work.

This scope includes the implementation of sequence of operation that optimizes the central chilled water plant and will integrate all new equipment in the sequence of operation. The optimization may be achieved through one of the following, and the bidders shall provide prices for all three solutions:

· By implementing a proprietary central plant optimization software package compatible with JCI Metasys systems and existing central plant equipment (such as Optimum Energy), and approved by GSA.

· Other vendor based solutions similar to above, and provided by other vendors that achieve similar energy savings results through central plant optimization. the software shall be compatible with JCI Metasys system, and be capable of operating the new and existing chiller plant equipment

· Customized design and programming of new and existing, and/or modification of central plant sequence of operation, which align with goals of this project GSA will not consider a solution that requires a monthly subscription fee.

The scope of work shall include:

· Addition of Primary chilled water Flow Metering

· Addition of primary and secondary energy use monitoring

· Sensor and Flow Meter Calibration

· Functional and Point-to-Point Testing

· Pre and Post TAB of Chilled Water and Condenser Water Pumping Systems

· Integration of new Water-side economizer into the plant sequence of operation

· Commissioning of existing Heat Recovery System (Add Alternate Price)

· Central Plant Optimization

· Relocation of the secondary chilled water differential pressure sensor, to the top of the loop on 20th floor, and near the bypass valve.

To properly monitor and manage energy consumption at the plant level, primary and secondary energy metering must be established. The primary side has no existing flow meter. The Carrier chiller (CH-3) does not have a true kW reading. The Trane chiller controllers are being replaced with new Trane Adapti-view controllers. Power meters need to be furnished and installed on the line side of the chiller and VFD. Note: Percent power or calculation from amps is not acceptable.

The contractor shall verify network interface requirements, and determine if additional instrumentation is necessary. NOTE: There are existing Eaton power meters installed for each chiller which are reporting to an antiquated and failed computer. These power meters may be re-used or replaced. However, the installing contractor shall be responsible for the power metering to be fully functional and calibrated at the end of this project.

3.3.1. Install Onicon magnetic insertion flow meter in the new Primary Chilled water loop with matched temperature sensors. Install the water flow meter at a location in the loop to ensure the equivalent of (10) pipe diameters of straight pipe (or as required by the manufacturer) before and after the flow meter to allow for accurate flow readings. The contractor shall field verify to ensure installation location is adequate for accurate reading.

3.3.2. Establish true power (kWh) readings for each chiller through either re-use or replacement of existing Eaton power meters. The meters shall provide input to the building automation system.

3.3.3. The Contractor must verify the above guidelines have been followed for the existing installation of the flow meter and temperature sensors. If not, the contractor will need to modify the existing installation to follow the guidelines.

3.3.4. Pre and Post TAB of Chilled Water and Condenser Water Systems. The contractor shall include and provide pricing for water-side pre and post testing and balancing of the chilled water systems in the central plant, including new waterside economizer, existing heat recovery system (located at 8th floor), and condenser water system. TAB shall include

3.3.4.1. The contractor shall include pricing for water-side pre and post testing and balancing of the chilled water and condenser water systems in the central plant, including new waterside economizer, existing heat recovery system (stretching to 8th floor). TAB shall include the following

3.3.4.2. Establish and document pre installation conditions though measuring water flow conditions, VFD minimum speed and flow and verify adequate water flow (per design) is reaching each cooling coil.

3.3.4.3. Establish post installation flow rates, and verify adequate water flow through pumps, heat exchanger and cooling coils and at pre TAB levels. Establish post installation differential pressure setpoint for optimum operation of the secondary chilled water system to assure cooling coils are being served, per design flow rates, at the same rate as pre-installation conditions.

3.3.4.4. Establish a balance between primary and secondary loop flows, to assure maximum plant efficiency. The efficiency of the primary/secondary loop shall mean that the primary flow rate is slightly higher than secondary, and making sure that the produced chilled water is being delivered to the building, at the same temperature as at the chiller discharge.

3.3.4.5. Provide documentation of pre and post installation TAB reports to GSA Project Manager.

3.3.5. Temperature sensors and flow meters shall be compatible with JCI and be calibrated and reporting accurately to the building automation system. The term calibration means that the installed sensor and readings are compared to an external calibrated sensor[footnoteRef:0], with point of readings no more than 6” away from the permanently installed BAS sensor. The contractor shall identify and document all flow meters and temperatures sensors in the central plant. The controls contractor shall include pricing to verify and calibrate the existing sensors in the central plant. The existing differential pressure sensor on the secondary chilled water loop shall be relocated to the top of the chilled water loop, on the 20th floor, and near the bypass valve. Verify sensors and flow meters are reporting accurate numbers to the BAS, and provide documentation of calibration to GSA Project Manager. [0: The instrument being used to indicate calibration of the permanently installed sensors shall have calibration certification within the last 12-months ]

3.3.6. Commissioning, Functional testing, and Point to Point verification The contractor shall include the cost of commissioning of the system as follows:

3.3.6.1. The contractor shall verify that each point terminated on the building automation system control board is properly terminated, and that the correct point is referenced within the programmed code.

3.3.6.2. The contractor shall verify and ensure that each piece of equipment, (i.e. valve, sensor, flow meter, etc.) is in good working condition at the end of the project. The contractor shall include pricing for functional and point-to-point testing for each electronically actuated valve on the primary chilled water pumping system, condenser water pumping systems, and provide documentation of testing results to GSA Project Manager.

3.3.6.3. Integration of new Water-side economizer, and verify that this system is operating per the approved sequence of operation. The contractor shall assure that maximum efficiency is obtained from this integration, and that the existing chillers are operating with the newly integrated water-side economizer system. This means that when the water-side economizer mode is switching mechanical refrigeration cycle, the condenser water supply temperature to the existing chillers shall be suitable for the chillers to maintain steady operation and without any damage to the chillers.

3.3.6.4. Commissioning of existing Heat Recovery System

The existing condenser water heat recovery system consists of two heat exchangers and two hot water pumps located on the 8th Floor Fan Room, and hot condenser water is supplied via CWP-3 located in the central plant. HX-2 serves the radiant heating system and HX-3 serves the main HW system. Programming and graphics are being transferred to the new BAS system as part of the BAS upgrade.

The goal of this commissioning task is to enable the heat recovery loop, during low heating loads, and when the condenser water return to the cooling tower is lower than heating hot water return temperature, to recover heat from the condenser water loop. This would provide low temperature reheat hot water for zones, and for low temp and pressure hot water for floor radiant heating zones.

As part of this commissioning task, verify the functionality of the system, verify that the existing BAS controls are operational and that the sensors (temperature, pressure, flow,etc) are at the correct location and operational. Verify that the sensors in the loop are within calibration and that the sequence of operation is optimal for this operation. Provide and implement modifications necessary for this system to function as low temp heating hot water supply for the building.

3.4. Design and Construction Guidelines

3.4.1. CAD Standards: GSA PBS P-100 2017, PBS CAD Standards.

3.4.2. Building Codes and Standards: Design and installation shall be specified to meet or exceed all applicable building Codes and Standards and to comply with GSA P-100 standard.

3.4.3. All drawings shall be stamped by a Licensed professional engineer, licensed to practice in the State of Washington, corresponding to the discipline drawing on which the design is presented.

3.4.4. Where applicable, the rated equipment efficiencies shall meet or exceed the latest version of ASHRAE 90.1 requirements.

3.4.5. Hydronic Piping

3.4.5.1. Piping should be sized to for a pumping head loss at or below 4 feet per hundred equivalent feet of piping at design flow rates.

3.4.5.2. Provide pipe coupling system to match existing. All dissimilar metal shall be decoupled to prolong the life of the system.

3.4.5.3. Design seismic restraint hangers and supports to match existing and comply with local, and current codes.

3.4.5.4. Provide pressure gages and temperature gages on both the inlet and outlet of all new devices installed at the central plant. This shall include flat-plate heat exchangers, chillers, pumps, etc. as applicable to the mechanical equipment.

3.4.5.5. Provide modulating bypass valve on bypass line for chilled water system to provide for minimum flow.

3.4.6. Disconnect Switch

3.4.6.1. Non-fused disconnect switches shall be provided for chillers, pumps, and associated electrical equipment, where applicable and if not already installed per current codes and standards.

3.5. Design Stage

Design submittals are required at the Preliminary (50%) and Final (100%) design stages, as well as a Corrected Final design.

3.5.1.1. Calculations: Calculations shall include:

3.5.1.1.1. Correct sizing of all operating equipment based on analysis of existing operational system via trend logs and history of current system operation. Priority for equipment sizing shall be based on maximum possible efficiency when the equipment operates.

3.5.1.1.2. Power systems load calculations, circuit ampacity, feeder size, breaker selection and voltage drop analysis to support the proposed wiring method and equipment selected.

3.5.1.1.3. Pipe sizing.

3.5.1.1.4. Vibration analysis. Chiller and piping shall be analyzed to ensure no structure borne or transmitted vibration shall exit the mechanical installation space. Contractor shall retain a qualified professional engineer to design all equipment and system supports.

3.5.1.2. Contractor shall provide a complete, unified system design (including design & construction documents) to GSA for approval prior to implementation. GSA shall have (10) ten working days to provide comments or ask question from the Contractor. The Contractor shall provide answers to GSA questions, or address GSA comments. After GSA Comments have been received, the Contractor shall provide a revised technical drawing set, or address GSA comments within one week. The Contractor shall not start the project until GSA acceptance of the design and concept has been issued.

3.5.1.3. Seismic Design: The seismic constraint design shall be completed by a qualified professional engineer, and shall comply with all applicable code requirements including but not limited to the International or Uniform Building Code with State and City amendments

3.5.1.4. 50% Design Deliverable Due eight (8) weeks from receipt of NTP. Provide two (2) hard copies (half-sized; 11/x17) and one (1) digital (CD/DVD) format. GSA will have fourteen (14) working days for review of this deliverable. GSA will provide written comments on the design, which the Contractor need to respond to within fourteen (14) calendar days of receipt. Upon Government’s acceptance of the design comment responses, the Contractor may progress to the next design stage.

3.5.1.5. Final (100%) Design Deliverable Due four (4) weeks from acceptance of the 50% Design. Provide two (2) hard copies (half-sized; 11x17) and one (1) digital (CD/DVD) format. GSA will provide written comments to the Contractor within fourteen (14) working days after receipt of the deliverable. Contractor shall provide a written response to any comments received within seven (7) calendar days. Upon Government’s acceptance of the design comment responses, the Contractor shall proceed to the Construction phase.

3.6. Execution (Construction) Phase

3.6.1. Commencement of Construction

Construction of work may begin after receipt of the clearance for construction (Notice to Proceed) for each design phase. Any work performed by the Contractor prior to receipt of the clearance for construction, shall be at the Contractor's own risk and expense. Work cleared for construction that does not conform to the design parameters and/or requirements of this contract shall be corrected by the Contractor at no additional cost or time to the Government.

3.6.2. General Requirements

3.6.2.1. Chiller plant shall remain operational and be able to meet normal building chilled water requirements as-needed throughout the entire construction demolition and commissioning process. Contractor shall submit a construction phasing plan to GSA for review and approval prior to the commencement of on-site work. GSA expects that work will be performed after normal business hours in order to minimize adverse impact on the tenant population.

3.6.2.2. When locating new equipment in Chiller Room consider design requirements for vibration control, access requirements for equipment servicing (including existing equipment), and ease of access to all other existing equipment in the chiller room (pumps, heat exchanger, etc.) for both servicing and future equipment replacement. Furthermore, all installed work shall meet all applicable codes and standards to include clearances for maintenance and egress.

3.6.2.3. Chiller Plant Control

3.6.2.3.1. Automated sequencing of all new equipment with existing pumps and with existing cooling towers to (1) match building load requirements, (2) minimize number of operating chillers required, (3) minimize chiller cycling, (4) maintain high cooling plant efficiency and (5) balance operating hours of the two larger machines and all existing pumps over time.

3.6.2.3.2. Building operators shall have the ability through the EMS to override automated sequencing so they can manually enable chiller start/stop sequences.

3.6.2.3.3. Use the existing slow-acting isolation valve for each tube bundle for chiller isolation control, when the unit is not in use.

3.6.2.3.4. Provide a fully functional graphics screen, incorporating all associated cooling plant equipment.

3.6.2.3.5. The graphics shall be animated showing the present status of all the equipment

3.6.2.3.6. The cooling plan shall have an accurate depiction of the central plant equipment and associated piping.

3.6.2.4. All mechanical equipment and piping shall be mounted on or suspended from vibration isolators to reduce the transmission of vibration and mechanically transmitted sound to the building structure. Vibration isolators shall be selected in accordance with the weight distribution so as to produce reasonably uniform deflections. Contractor shall not make rigid connections between equipment and the building structure that degrades noise and vibration control.

3.6.2.4.1. Mechanical Identification

3.6.2.4.1.1. Provide manufactured pipe markers to match existing that indicate service on each piping system. Install with flow indication arrows showing direction of flow.

3.6.2.4.1.2. Provide matching valve tags, color coded for service, on valves and control devices in piping systems. List tagged valves in a valve schedule mounted on wall.

3.6.2.4.1.3. Provide equipment markers: Engraved laminated plastic.

3.6.3. Testing and Balancing

3.6.3.1. Perform each applicable visual and mechanical inspection and electrical test stated in NETA Acceptance Testing Specification. Chilled and Condenser Water Systems.

3.6.3.2. Balance chiller system and existing associated pumps.

3.6.3.3. Testing, Adjusting & Balancing (TAB) Agent Qualifications: AABC or NEBB certified.

3.6.4. Installation Submittals

3.6.4.1. Submit product data indicating rated capacities, weights (delivered and operating), dimensions, required clearances, specialties and accessories, electrical requirements and wiring diagrams.

3.6.4.2. Drawings: Floor plans for new construction, drawn to scale and coordinated with the following:

3.6.4.2.1. Structural supports.

3.6.4.2.2. Piping.

3.6.4.2.3. Wiring, including spaces reserved for electrical equipment.

3.6.4.2.4. Access requirements, including working clearances for mechanical controls and electrical equipment, and tube pull and service clearances.

3.6.4.2.5. Demolition and new construction hydronic flow schematics showing chilled water system in chiller room and entire condenser water system.

3.6.4.2.6. I/O summary with schematics of systems

3.6.4.2.7. Submit shop drawings indicating components, assembly, dimensions, weights and loadings, required clearances and location and size of field connections. Indicate equipment, piping and connections, valves, strainers, gages and valves required for a complete system.

3.6.4.2.8. Chiller Plant Control System

3.6.4.2.8.1. Schematic flow diagrams showing pumps, valves, chillers and control devices.

3.6.4.2.8.2. Wiring Diagrams: Power, signal, and control wiring.

3.6.4.2.8.3. Details of control panel faces, including controls, instruments, and labeling.

3.6.4.2.8.4. Written description of sequence of operation.

3.6.4.2.8.5. Schedule of valves including leakage and flow characteristics.

3.6.4.2.8.6. Listing of connected data points, including connected control unit and input device.

3.6.4.2.8.7. JCI system graphics indicating monitored systems, data (connected and calculated) point addresses, and operator notations.

3.6.4.2.8.8. Schematics shall contain information for all chiller plant points in all panels and all associated wiring.

3.6.4.2.8.9. Control schematics: Point to point wiring diagrams including complete power system, interlocks, control device connection and communication connections. Schematics shall contain information for all points in all panels and all associated wiring.

3.6.4.3. Operation and Maintenance Data

3.6.4.3.1. Submit two (2) hard copies and one (1) digital (CD/DVD) of the operations and maintenance data under provisions of Conditions of the Contract.

3.6.4.3.2. Include complete startup instructions, maintenance data, parts lists, controls and accessories. Include trouble-shooting guide and all referenced material.

3.6.4.3.3. Provide training for all installed systems to operating staff and follow up training during warranty period.

3.7. Regulatory Requirements

a. Conform to GSA PBS P-100.

b. Conform to ARI 550-2003 code for testing and rating of water chillers

c. Conform to ANSI/UL 465 code for construction of water chillers

d. Provide UL label on water chillers

e. Conform to ANSI/ASME SEC 8 Boiler and Pressure Vessel Code for construction and testing of water chillers

f. Conform to ANSI/ASHRAE 15 code for construction and operation of water chillers

g. Conform to National Electrical Code

h. ASHRAE 90.1 latest version and Washington State Energy Code

i. Conform to all national, state and local codes, including seismic codes

j. Unit shall bear the ARI Certification Label for Centrifugal/Rotary Water-cooled Chillers

k. Electrical Components, Devices, and Accessories: Shall be Listed and labeled, as defined in NFPA 70 Article 100, by a testing agency acceptable to GSA, and marked for intended use

3.8. Delivery, Storage and Handling

Delivery, Storage and Handling

3.9. Warranty

3.9.1. Provide complete parts and labor warranty for one year from project substantial completion and acceptance of equipment by GSA. Provide an additional five year parts and labor warranty for all chiller compressors. Substantial completion shall mean, when the installed equipment is able to provide beneficial use to the bldg., under the provisions of this contract.

3.10. Security Requirements

3.10.1. Work is located within the Federal Courthouse; clearance shall be required of all persons working in any area controlled. All badges and authorizations provided through GSA/USMS shall be on the person and clearly visible for a positive identification at all times and while on the premises.

3.11. Permits and Permissions

3.11.1. Any work or activity that may require cutting, welding or a method that may create or cause a fire or generation of smoke, shall be done with an approved “Burn Permit”. Permit shall be requested by the contractor on GSA form # 1755, and approved by a GSA, Operation Manager, before any work of the above nature may begin.

4. Performance and Scheduling

4.1.1. Project Schedule

4.1.1.1. Contractor shall commence work under this contract within five (5) calendar days after the issuance of the Notice to Proceed (NTP) for Design, prosecute the work diligently, and complete all work, including Design, Construction and Close-out activities, no later than 300 calendar days after the issuance of the NTP of Design. The time stated for completion includes final cleanup of the premises and submission of all required close-out documentation.

4.1.1.2. Proposed Milestones Schedule

The proposed project milestones and durations are indicated below; however, the Contractor is ultimately responsible for overall project schedule. Proposed durations are measured from receipt of Notice to Proceed (NTP) of Design. Final completion, which includes all site clean-up activities, resolution of punch list items and approval of close-out documentation, shall occur not later than thirty (30) calendar days after Substantial Completion.

(Cal Days) Remarks

4.0 Document Security

The design documents shall provide, and the Contractor shall abide by, the following labeling and document handling requirements as well as PBS P 3490.2. This requirement flows down to all subcontracts, and the text shall be included in all subcontracts under this project. All Sensitive But Unclassified (SBU) information, including all electronic and paper format documents, shall be permanently labeled with the following in bold type on each page:

SENSITIVE BUT UNCLASSIFIED (SBU)

PROPERTY OF THE UNITED STATES GOVERNMENT

FOR OFFICIAL USE ONLY

Do Not Remove This Notice Properly Destroy or Return Documents When No Longer Needed

In addition, the following shall be prominently labeled in bold type on the cover or first page of any document and on the label of all digital media:

SENSITIVE BUT UNCLASSIFIED (SBU)

PROPERTY OF THE UNITED STATES GOVERNMENT

COPYING, DISSEMINATION, OR DISTRIBUTION OF THIS DOCUMENT TO UNAUTHORIZED RECIPIENTS IS PROHIBITED

FOR OFFICIAL USE ONLY

Do Not Remove This Notice Properly Destroy or Return Documents When No Longer Needed

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