ECAO_HVAC_Maint_Performance_Work_Statement_(PWS)_SS_1.pdf

PERFORMANCE WORK STATEMENT (PWS)

Bureau of Reclamation

Eastern Colorado Area Office, Loveland, Colorado

HVAC Systems Maintenance

A. INTRODUCTION

This contract is for preventative and corrective maintenance of heating, ventilation, and air conditioning (HVAC) equipment at the Bureau of Reclamation’s Eastern Colorado Area Office to ensure the reliable and efficient operation of these systems.

B. PERIOD OF PERFORMANCE

Performance period for this contract is one (1) base year plus four (4) one year option periods for a potential maximum contract performance period of five (5) years:

1. Base Period: June 1, 2024 – May 31, 2025

2. Option Year 1: June 1, 2025 – May 31, 2026

3. Option Year 2: June 1, 2026 – May 31, 2027

4. Option Year 3: June 1, 2027 – May 31, 2028

5. Option Year 4: June 1, 2028 – May 31, 2029

C. PLACE OF PERFORMANCE

All work will take place at the Eastern Colorado Area Office locations:

• 11056 West County Road 18E, Loveland, CO 80537

• 910 Van Buren Avenue, Loveland, CO 80537

D. BACKGROUND

The systems to be serviced are in Loveland Colorado. They were constructed in the 1950’s with the

HVAC equipment upgraded at various times thereafter. The ECAO main office building at 11056

West County Road 18E, west of Loveland, Colorado is approximately 16,500 square feet and houses approximately 50 employees.

The ECAO main office building HVAC systems consist of one main system and two independent sub-systems. The main system heats and cools the bulk of the building. The two sub-systems consist of separate air conditioning (A/C) systems for the server room and communications equipment room.

The Building A also known as the communications shop (com shop) is located immediately to the left as you enter a locked gate at 910 North Van Buren Ave is approximately 5250 square feet in size and accommodates up to 60 employees when meetings are held, but only 5 employees during normal operations. Building F is located east-southeast of the entry gate at 910 Van Buren Ave. is approximately 850 square feet in size and accommodates 5 employees.

E. SCOPE

The Contractor shall furnish all necessary management, supervision, labor, equipment, materials, transportation, and supplies required to provide preventative maintenance (PM) and corrective maintenance (CM) services for the ECAO HVAC systems as outlined in this document.

Subj: ECAO HVAC Maintenance Performance Work Statement

Main Office

Address: 11056 West County Road 18E

The scope of work is limited to the HVAC systems which serve the main ECAO office building. Does not include any other buildings located at the same address. The scope for the cooling water supply piping begins where the supply pipe penetrates the exterior wall and enters the office building in room

B12 (near building line 8 as shown on drawing 245-D-10065). The scope includes maintenance of all installed equipment required to operate and monitor the HVAC systems including, but not limited to piping, ducting, pumps, fans, controls, valves, strainers, filters, heat exchanger tube bundles, instrumentation, electrical disconnects and breakers, wiring, etc. The scope also includes programming and adjusting parameters within any control devices or computers and adjusting airflows with existing installed equipment. The scope for maintenance of electrical distribution includes, but does not extend beyond, the supply breakers and disconnects which supply power to the HVAC equipment within scope of this contract. Contractor shall be capable of performing corrective maintenance (repair) of compressor B1, a component of the 50-ton chiller, although it is not within the scope of this contract.

The major components of the HVAC systems include:

1. 50-ton chiller (Carrier model number 30HK-050-D-610) with two compressors (A1, B1), R-22 refrigerant, and associated pumps, valves, and sensors. B1 is not operational.

2. Cooling water supply from Flatiron Powerplant.

3. Digital control units, one for the original portion of the building and a second for the newer north annex which communicate with local interface thermostats throughout the building.

4. 36 ceiling mounted FCU’s throughout the building. All FCU’s have chilled water coils with local control valves and some also have electric heaters.

5. Make-up air system including fans, motor operated dampers, and pressure sensors.

6. Two independent split-system A/C systems with outside condenser units for the office communications room (B15) and the server equipment room (B3).

See Attachment 1 for a listing of known equipment at the main office building. Additional equipment included in the scope may be evident during on-site inspection.

Building A

Address: 910 North Van Buren Avenue

The scope includes maintenance of all equipment required to operate and monitor the HVAC systems including piping, ducting, pumps, fans, controls, valves, instrumentation, electrical disconnects and breakers, wiring, etc. The scope includes programming and adjusting parameters within any control devices and computers and adjusting airflows with existing installed equipment. The scope for maintenance of electrical distribution includes, but does not extend beyond, the supply breakers and disconnects which supply power to the HVAC equipment within scope of this contract.

The major components of the HVAC systems include:

1. 3 exterior HVAC units on west side of building.

2. 2 ceiling mounted heaters

3. Miscellaneous HVAC equipment including thermostats, fan units, filters, duct controls and ancillary equipment.

Additional equipment not noted above, but still included in the scope may be evident during on-site inspection.

Building F

The scope includes maintenance of all equipment required to operate and monitor the HVAC systems including piping, ducting, pumps, fans, controls, valves, instrumentation, electrical disconnects and breakers, wiring, etc. The scope does include programming and adjusting parameters within any control devices and computers and adjusting airflows with existing installed equipment. The scope for maintenance of electrical distribution includes, but does not extend beyond, the supply breakers and disconnects which supply power to the HVAC equipment within scope of this contract.

The major components of the HVAC systems include:

1. Roof Mounted package unit.

2. Interior ceiling mounted furnace,

3. Interior ceiling mounted evaporator

4. Miscellaneous HVAC equipment including thermostats, fan units, filters, duct controls and ancillary equipment.

Additional equipment not noted above, but still included in the scope may be evident during on-site inspection. See Attachment 2 for pictures of equipment at Building A and F.

F. PERFORMANCE REQUIREMENTS

1. Preventative Maintenance (PM). The Contractor shall perform PM inspections and services on the HVAC equipment. The contractor to which the work is awarded shall initially inspect the installed HVAC equipment and research the manufacturer maintenance recommendations for use in the preventative maintenance.

a. Preventative Maintenance Plan (PM Plan). Prospective bidders shall submit, as part of their response to the Request for Proposal (RFP), a written PM Plan. This plan shall comply with manufacturer recommendations and include a detailed list of tasks to be performed and associated frequencies. This plan will become part of the final contract.

b. Attachments A-C are the available Operation and Maintenance (O&M) manuals and list of known filters for installed HVAC equipment at ECAO main office. No manuals are available for equipment at Buildings A and F. The proposed PM Plan should address, at a minimum, the recommended maintenance items included in these O&M manuals as well as prudent industry practice. If the Contractor believes certain items can be or should be excluded, they should be addressed along with a justification for exclusion.

c. Changes to PM Plan after Award. If the Contractor determines after award that changes are needed to the PM Plan (i.e. adding or removing tasks, increasing, or decreasing frequencies), these changes along with adequate justifications shall be submitted in writing to the Contracting Officer’s Representative (COR).

d. After each inspection the Contractor will meet with the COR (in person or via phone call) and review the results of the inspections. At this meeting the Contractor will provide a written service report including any identified deficiencies and recommended actions. After each inspection is completed the Contractor will clean up their work area.

2. Corrective Maintenance (CM). The Contractor shall provide services outside of those detailed elsewhere in the contract. These services will be unforeseen repair of HVAC equipment and systems that can be reasonably charged to the contract and under the current agreed upon (of the contract) labor hour rates.

a. The determination of WITHIN SCOPE will be made by the Contracting Officer (CO).

b. If the Contractor and/or COR determine equipment is beyond economical repair, the

Contractor, in coordination with the COR, shall recommend to the CO, in writing, that such equipment be replaced. The Contractor shall identify the part(s) required and provide a replacement cost, with substantiating data to support why the recommended replacement is required. The Contractor shall provide an initial diagnosis and Work

Estimate to the COR. The Work Estimate shall include the following:

(1) List of materials

(2) Estimated labor hours

(3) Estimated cost of parts

(4) Lead times

(5) Completion schedule

3. Maintenance Log. The Contractor must maintain a written maintenance log of all work performed. The log shall remain on-site at ECAO. Any format is acceptable, however, the log must contain at a minimum the following:

a. Dates and times of site visits

b. Narrative description of work performed

c. Name(s) of Contractor employee(s) who performed work

d. Problems or constraints identified while performing work

e. Suggested solutions to problems or constraints encountered

f. List of any replaced parts and/or materials

G. MANAGEMENT

The Contractor shall manage the total work effort associated with the maintenance services required herein to ensure fully adequate and timely completion of these services. Such management includes, but is not limited to, planning, scheduling, report preparation, establishing and maintaining records and inventories, warranty enforcement, and quality control. The Contractor shall provide an adequate staff of personnel with the necessary management expertise to assure the performance of the required work.

1. Work Control. The Contractor shall implement all necessary work control procedures to ensure fully adequate and timely completion of work requirements, as well as to permit tracking of work in progress. The Contractor shall plan and schedule work to assure material, labor, and equipment are available to complete work requirements within the specified time limits and in conformance with the quality standards established herein. Verbal scheduling and status reports shall be provided when requested by the CO or the COR. The status of any item of work must be provided within four (4) hours of the inquiry during regular working hours, and within eight (8) hours after regular working hours.

2. Allowable Work Hours. Except as may otherwise be specified, all work shall be performed at the main office between 8:00 am and 3:30 pm Monday through Thursday. Work at the warehouse must be arranged with CO for access to buildings. If the Contractor desires to perform work on Saturday, Sunday, federal holidays, or outside regular working hours, he/she must obtain the written approval of the CO or the COR.

3. Work Schedule. The Contractor shall schedule and arrange work so as to cause the least interference with the normal occurrence of Government business and mission. In those cases where some interference is unavoidable, the Contractor shall make every effort to minimize the impact of the interference and its effects. The Contractor shall notify the COR at least two (2) working days in advance of any on-site work to be performed.

4. Records and Reports. The Contractor shall maintain management, operation, and maintenance records and prepare management, operation, and maintenance reports. All records and copies of reports shall be turned over to the CO or the COR within five (5) calendar days after contract completion.

H. GENERAL REQUIREMENTS AND PROCEDURES

1. Standards. All work shall meet the standards specified herein and shall be accomplished in conformance with approved and accepted standards of the industry; equipment manufacturers;

all applicable activity, local, state, and federal standards; and all applicable building and safety codes.

a. When the Contractor completes an inspection on a system or piece of equipment, that system or equipment shall be free of missing components or defects which would prevent it from functioning as originally intended and/or designed. Maintenance work shall be carried to completion including operational checks and cleanup of the job site. Except where otherwise noted, replacements shall match existing in dimensions, finish, color, and design.

b. During and at completion of inspection, debris shall not be allowed to spread unnecessarily into adjacent areas nor accumulate in the work area itself. All such debris, excess material, and parts shall be cleaned up and removed at the completion of the job and/or at the end of each day work is in progress.

2. Safety and Health Requirements. It shall be the responsibility of the Contractor to adhere to the following Safety and Health Requirements:

a. Contractor personnel shall be trained and equipped to work within and comply with

OSHA and Government Safety and Health (RSHS) standards. Contractor will demonstrate compliance with Government, work practices by providing a Job Hazard Analysis (JHA) for all field work conducted onsite. JHA must be submitted and approved by COR prior to commencing work at the Area office. RSHS may be accessed at http://www.usbr.gov/ssle/safety/RSHS/rshs.html.

b. Contractor shall provide PPE for workers and shall utilize a personal protective equipment program consistent with the OSHA Standards and Government Safety and

Health Standards (RSHS). Such PPE shall include but is not limited to: steel toed boots, eye protection, hearing protection, head protection if applicable. Personal protective equipment shall meet the applicable OSHA, ANSI, NIOSH and Government Safety and

Health standards.

c. The Contractor shall not require or permit any employee conducting performance under the anticipated contract to engage in work under conditions which are unsanitary, hazardous, or dangerous to employee’s health or safety.

d. The Contractor is responsible for ensuring that each employee observes all health and safety regulations and compliance with instructions issued to them by the CO or COR.

3. Replacement, Modernization, Renovation. During the term of the contract, the Government may replace, renovate, or improve equipment, systems, facilities, components, and fixtures at the Government's expense and by means not associated with this contract. All replaced, improved, updated, modernized, or renovated equipment, fixtures, facilities, components, and systems shall be maintained by the Contractor at no additional cost to the Government unless such changes result in an increase or decrease in contract requirements. Changes, replacements, or deletions, which result in an increase or decrease in contract requirements, will result in adjustments to the contract price, in accordance with the FAR 52.243-1, Changes-

Fixed-Price clause.

4. Equipment under Manufacturer's or Installer's Warranty. Equipment, components, and parts, other than that installed under this contract, shall not be removed or replaced, or deficiencies corrected while still under warranty of the manufacturer or the installer without prior approval of the CO or the COR.

All defects in material or workmanship, defective parts, or improper installation and adjustments found by the Contractor shall be reported to the CO or the COR so that necessary action may be taken.

5. Completed Calls. With the invoice the Contractor shall add the following information to the work authorization form and deliver one completed copy to the Contracting Officer or the COR:

a. Description of work actually completed.

b. Brief description of material and parts used, including quantities.

c. Date and time work began.

d. Date and time work was completed.

e. Signature or initials of the Contractor's maintenance staff performing the work (or supervisor), indicating that the work has been completed.

6. Access to Buildings.

a. It shall be the Contractor's responsibility, through the CO or the COR, to obtain access to buildings and facilities and arrange for them to be opened and closed.

b. The Contractor shall be responsible for the cost of replacing any keys that are furnished to and lost by his employees. If the CO or the COR decides that a lock must be replaced because of the loss of a key by the Contractor's employees, the Contractor shall pay the cost of that http://www.usbr.gov/ssle/safety/RSHS/rshs.html replacement. Similarly, the Contractor shall pay the cost of changing a combination if the

Contracting Officer or the COR has reasonable cause to believe that the combination has been compromised.

7. Identification of Contractor Employees.

a. The Contractor shall provide to the CO or the COR the name or names of the responsible supervisory person or persons authorized to act for the Contractor.

b. The Contractor shall furnish sufficient personnel to perform all work specified within the contract.

c. Contractor employees shall conduct themselves in a proper, efficient, courteous and businesslike manner.

d. The Contractor shall remove from the site any individual whose continued employment is deemed by the CO or the COR to be contrary to the public interest or inconsistent with the best interests of National Security.

e. No employee or representative of the Contractor will be admitted to the site of work unless he furnishes satisfactory proof that he is a citizen of the United States, or, if an alien, his residence within the United States is legal.

f. All contractor/subcontractor employees working under this contract shall be identified by a distinctive name plate, emblem, or patch attached in a prominent place on an outer garment.

Employee identification shall not be substituted for station required passes or badges.

8. Identification of Contractor Vehicles. The company name shall be displayed on each of the

Contractor's vehicles in a manner and size that is clearly visible. All vehicles shall display a valid state license plate and safety inspection sticker, if applicable, and shall be maintained in good repair.

9. Permits. The Contractor shall, without additional expense to the Government, obtain all appointments, licenses, and permits required for the prosecution of the work. The Contractor shall comply with all applicable federal, state, and local laws. Evidence of such permits and licenses shall be provided to the CO or the COR before work commences.

10. Contractor Employee Training. The Contractor is responsible for all training for its employees except when training can only be provided by Reclamation. Requests for training by exception must be provided to and approved by the CO prior to the Government conducting training. The Contractor shall sign a Hold

Harmless Release for any training provided by the Government.

I. CONTRACTOR FURNISHED ITEMS

The contractor shall provide the equipment, tools, and services to perform the requirements of this contract. The contractor will also provide maintenance material including pleated air filter, fan belts, lubricants, coil cleaner, condensate pan chemical and other miscellaneous materials.

J. GOVERNMENT-FURNISHED PROPERTY (GFP)

1. Government-Furnished Real Property. Government property has been inspected for compliance with the OSHA regulations. No hazards have been identified for which work-arounds have been established.

Should a hazard be subsequently identified, the government will correct OSHA hazards according to government developed and approved plans of abatement taking into account safety and health priorities.

A higher priority for correction will not be assigned to the property provided hereunder merely because of this contracting initiative. The fact that no such conditions have been identified does not warrant or guarantee that no possible hazard exists, or that work-around procedures will not be necessary or that the property as furnished will be adequate to meet the responsibilities of the contractor. Compliance with OSHA and other applicable laws and regulations for the protection of employees is exclusively the obligation of the Contractor. Further, the government will assume no liability or responsibility for the contractor’s compliance or noncompliance with such requirements, with the exception of the aforementioned requirement to make corrections according to approved plans of abatement subject to base-wide priorities. Before any modification of the property performed by the Contractor at his or her expense, the Contractor must furnish the CO documentation describing, in detail, the modification requested. No alterations to the property must be made without specific written permission from the

CO. In the case of alterations necessary for compliance with OSHA, such permission must not be unreasonably withheld. The contractor must return the property to the Government in the same condition as received, fair wear and tear and approved modifications excepted. The property must only be used in performance of this contract.

2. Government-Furnished Equipment and Materials. All installed HVAC equipment to be maintained by the Contractor is considered GFE. Other spare parts and materials may be made available to the

Contractor at the Government’s discretion during performance of this contract. Consumable parts and materials which are replaced under this contract (i.e. air filters, fan belts, oil, etc.) shall be disposed of by the Contractor and the replacement parts and materials furnished by the Contractor. Such parts and materials furnished and installed by the Contractor shall become property of the Government.

K. GOVERNMENT FURNISHED SERVICES (GFS)

1. Government-Furnished Utilities. Reclamation will furnish all necessary utility services used at ECAO. The Contractor must ensure all employees use methods to conserve utilities.

a. Lights must be used only in areas where work is actually being performed.

b. Water faucets or valves must be turned off when not in use.

2. Telephone Services. Reclamation will provide telephone service for Contractor use at no cost to the Contractor. Use of telephones is authorized only for official business. Contractor personnel must not relocate government-furnished telephone equipment or tamper, in any way, with the telephone distribution system. The Contractor must notify the COR when maintenance, repair, or change in service of telephone equipment is required. The contractor must be responsible for all costs associated with contractor initiated upgrades or changes in service.

L. GOVERNMENT QUALITY ASSURANCE (QA)

According to the Inspection of Services clause located in the in contract additional terms and conditions addendum, the Government will evaluate the contractor’s performance under this contract.

For those tasks listed on the Performance Requirements Summary (PRS), the COR will follow the methods of surveillance specified in Quality Assurance Surveillance Plan (QASP). Government personnel will record all surveillance observations. When an observation indicates defective performance, the COR will require the Project Manager or representative at the site to initial the observation. The initialing of the observation does not necessarily constitute concurrence with the observation, only acknowledgment that he or she has been made aware of the defective performance.

Government surveillance of tasks not listed in the PRS or by methods other than those listed in the

PRS (such as provided for by the Inspection of Services clause) may occur during the performance period of this contract. Such surveillance will be done according to standard inspection procedures or other contract provisions. Any action taken by the CO as a result of surveillance will be in accordance with the terms of this contract.

M. DEFINITIONS AND ACRONYMS

1. Definitions.

a. Contractor. A supplier or vendor having a contract to provide specific supplies or service to the government. The term used in this document refers to the prime.

b. Contracting Officer. A person with authority to enter into, administer, and/or terminate contracts, and make related determinations and findings on behalf of the government. The only individual who can legally bind the government.

c. Contracting Officer's Representative. An employee of the U.S. Government appointed by the Contracting Officer to administer the contract. Such appointment must be in writing and must state the scope of authority and limitations. This individual has authority to provide technical direction to the Contractor as long as that direction is within the scope of the contract, does not constitute a change, and has no funding implications. This individual does NOT have authority to change the terms and conditions of the contract.

d. Defective Performance. A service output that does not meet the standard of performance associated with the Performance Work Statement.

e. Deliverable. Anything that can be physically delivered but may include non-physical things such as meeting minutes.

f. Physical Security. Actions that prevent the loss or damage of Government property.

g. Quality Assurance. The government procedures to verify that services being performed by the Contractor are performed according to acceptable standards.

h. Quality Assurance Surveillance Plan. An organized written document specifying the surveillance methodology to be used for surveillance of contractor performance.

i. Quality Control. All necessary measures taken by the Contractor to assure that the quality of an end product or service must meet contract requirements.

2. Acronyms.

A/C Air Conditioning

BOR Bureau of Reclamation

CM Corrective Maintenance

CO Contracting Officer

COR Contracting Officer’s Representative

COTS Commercial Off-The-Shelf

DDC Direct Digital Control

ECAO Eastern Colorado Area Office

FAR Federal Acquisition Regulation

FCU Fan Coil Unit

GFP/M/E/S Government Furnished Property/Material/Equipment/Services

HVAC Heating, Ventilation, and Air Conditioning

JHA Job Hazard Analysis

OSHA Occupational Safety and Health Administration

PM Preventative Maintenance

POC Point of Contact

PRS Performance Requirements Summary

PWS Performance Work Statement

QA Quality Assurance

QASP Quality Assurance Surveillance Plan

QC Quality Control

QCP Quality Control Plan

Attachment 1: HVAC Equipment List and Data

The responsibilities of the Contractor shall not be limited to the major components of the equipment listed, but shall include all appurtenant devices and systems that are related to the equipment (e.g.

controls, sensors, compressors, pumps, fans, etc.).

Additional data is available in attached drawings, O&M manuals, and balancing reports.

Main Air Handling Unit (AHU)

Fan/Blower Data

Mfg: American Blower

Model: 360

Actual cfm: 9,268 cfm (from Jan-2018 balancing report)

Motor mfg: Baldor

Motor model: 36G548S270G1

Motor data: 5.0 hp, 1750 rpm, 3 phase, 460 volt, 60 Hz

Belt size: B136 (3)

Chiller

Mfg: Carrier

Model: 30HK-050-D-610

Capacity: 50 ton

Compressor A1

Mfg: Carlyle

Model: 06E6175310

Compressor B1

Mfg: Carlyle

Model: 06E2150310

Makeup Air Units (MAUs)

Fan/Blower Data – NCF1

Motor mfg: Leeson

Motor frame: 48Z

Motor data: 0.25 hp, 1725 rpm, 1 phase, 115 volt, 60 Hz

Design cfm: 230 cfm

Actual cfm: 277 cfm (from Oct-2017 balancing report)

Belt size: AX37

Fan/Blower Data – NCF2

Motor mfg: Dayton

Motor frame: 48Y

Motor data: 0.5 hp, 1725 rpm, 1 phase, 115 volt, 60 Hz

Design cfm: 450 cfm

Actual cfm: 461 cfm (from Oct-2017 balancing report)

Belt size: A36

Fan Coil Units (FCUs)

FCU Location Mfg. Model Motor

Mfg.

Motor hp

Design cfm

Heating

Coils

Cooling

Coils

U1 Room B1 Snyder

General TSH041FR McQuay 1/15 200 X X

U2 Room B2 Snyder

General TSH081FR McQuay 1/8 475 X X

U4 Room B4 Snyder

General TSH061FR McQuay 0.05 300 X X

U5 Room B8 Snyder

General TSH081FR McQuay 1/8 475 X X

U6 Room

Snyder

General TSH041FR McQuay 1/15

(act.)

X X

U7 Room

Snyder

General TSH081FR McQuay 1/8 475 X X

U8 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U9 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U10 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U11 Room

117-3

Snyder

General TSH081FR McQuay 1/8 300 X X

U12 Room

Snyder

General TSH081FR McQuay 1/8 476 X X

U13 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U14 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U15 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U16 Room

124-1

Snyder

General TSH041FR McQuay 1/15 200 X X

U17 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U18 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U19 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U20 Room

Snyder

General TSH041FR McQuay 1/15 200 X X

U21 2nd Floor

NE

Snyder

General TSH041FR McQuay 1/15 200 X X

U22 2nd Floor

SE

Snyder

General TSH041FR McQuay 1/15 200 X X

U23 2nd Floor

S

Snyder

General TSH041FR McQuay 1/15 200 X X

U24 2nd Floor

W

Snyder

General TSH081FR McQuay 1/8 476 X X

U25 Room

Snyder

General TSH041FR McQuay 1/15 300 X X

NFC31

Room

B14 McQuay FTSH-2S08 Fasco 1/8 380 X

NFC32

Room

McQuay FTSH-2S10

Fasco

(2)

1/8, 1/15 200 X

FCU Location Mfg. Model Motor

Mfg.

Motor hp

Design cfm

Heating

Coils

Cooling

Coils

NFC33

Room

McQuay FTSH-2S12

McQuay

(2) 1/8 476 X

NFC34

Room

117-2 McQuay FTSH-2S10

McQuay

(2)

1/8, 1/15 300 X

NFC35

2nd Floor

SW

McQuay FTSH-2S12

McQuay

(2) 1/8

(act.)

X

NFC40

North

Annex McQuay FTHC-1H08

McQuay

(2)

1/10, 1/33 260 X X

NFC41

North

Annex McQuay 5.HZH.1.S20.Q.D.00 Emerson 1.5 1,620 X X

NFC42

North

Annex McQuay F.HZH.1.S12.Q.D Century 3/4 1,300 X X

NFC43

North

Annex McQuay F.TSH.2.S08.A.A.00 Fasco 1/8 480 X X

NFC44

North

Annex McQuay F.TSH.2.S04.A.A.00 Fasco 1/15 350 X

NFC45

North

Annex McQuay F.TSH.2.S08.A.A.00 Fasco 1/8 480 X

NFC46

North

Annex McQuay F.TSH.2.S04.A.A.00 Fasco 1/15 370 X

Server Room A/C

The server room (room B3) has a dedicated A/C system. A new system was installed in 2017 which consists of an outdoor air-cooled condensing unit (located on the east side of the building) and a ceiling mounted evaporator unit with built-in humidifier located above the ceiling tiles in room B3.

Communications Room A/C

The communications room (room B15) has a dedicated A/C system. The age of the system is unknown, but includes an outdoor air-cooled condensing unit and a ceiling mounted in-duct evaporator unit.

ECAO HVAC System Description

The ECAO main office building was updated in 2001 and 2002 with a chilled water system and local fan coil units. In 2016 and 2017, additional upgrades were made to incorporate a Direct Digital

Control (DDC) system. Conditioned air is distributed by a network of ductwork, fan units, and fan coil units located throughout the building. Water for the HVAC system is supplied from the neighboring

Flatiron Powerplant penstocks through a four-inch pipe and a series of pressure reducing valves

(PRVs). Pressure is reduced from about 495 psig in the plant penstocks (120 psi in the Unit 3 penstock) by a series of PRVs located inside the powerplant to about 45 psig. The water supply enters the ECAO building at this pressure and then is further reduced to about 40 psig by another PRV located in room B12 (there are two 100% capacity PRVs in parallel with one in service at a time).

Upstream of these PRVs is a y-strainer and automatic flush valve also located in room B12. Each PRV also has a separate y-strainer (no automatic flush).

The chiller, main air handling unit (AHU), central DDC equipment, and other ancillary equipment are located in room B10. The cooling system can operate in two district modes: “Chiller Mode” and

“Econo Mode”. The system automatically switches between these two modes by repositioning motor operated valves. The system will operate in Chiller Mode when the following parameters are met:

(1) Building is occupied (per scheduler or override)

(2) Outside air temperature is greater than 55°F (adjustable set point)

(3) Penstock water supply is greater than 49°F (adjustable set point)

(4) Average south building temperature greater than 71.5°F (adjustable set point)

In Econo Mode, the system operates in an open loop. The chiller is off and cooling water is supplied directly to the AHU and FCU cooling coils from the Flatiron Powerplant penstocks (through the

PRVs). The cooling water makes a single pass through the system and is discharged to a drain (and eventually to Flatiron Reservoir).

In Chiller Mode, the chiller is operating and supplying chilled water to the main AHU cooling coils and local FCU cooling coils in a semi-closed loop. The chiller has two compressors and three heat exchangers (one cooler, two condensers). The compressors and refrigerant loop transfer heat from the chilled water (flowing through the cooler) to the condenser water. The condenser water is supplied directly from the Flatiron Powerplant penstock supply. The condenser water pump circulates water through the condenser and the modulating temperature control valve TRV-1A on the outlet side of the condenser modulates open to allow water from the condenser outlet to go to drain (allowing cooler water from the penstock to enter the system). TRV-1A modulates based on the Condenser Water

Supply (CWS) temperature sensed on the inlet side of the condenser.