Solicitation W912EK21T0024.pdf

REQUEST FOR QUOTATION

PLEASE RETURN TO:

US Army Corps of Engineers

US Army Corps of Engineers Clocktower Building DDC Upgrade

W912EK-21-T-0024

Attn: Nicholas Moore 1500 Rock Island Drive Rock Island, Illinois 61201 Email: nicholas.m.moore@usace.army.mil

PLEASE INCLUDE THE FOLLOWING INFORMATION:

1. Complete Block 17a on the SF1449 - Enter Name, Address, and Current Phone Number of Person to

Contact Regarding Proposal

2. Complete and sign Blocks 30a, 30b, and 30c on the SF1449

3. Complete Offeror Representations and Certifications (Clause 52.212-3) if your company has not completed the Representations and Certifications located with your company’s SAM record (https://www.sam.gov).

4. Complete and submit the SF1449 and Bid Schedule.

5. Please fill out the the information below completely and include this cover page with your offer, along with the above items that need to be filled out.

6. Ensure costs associated with the security clause 2(b) and 15 of the PWS are included in your final price.

7. Include the Solicitation Number on the outside of your envelope, cover sheet, or as subject line if submitting by email pdf format. It is the responsibility of the offeror to verify that their offer has been received and is legible when using a method other than electronic format to submit an offer.

8. Technical questions must be submitted directly to the Contract Specialist listed above.

Contractors must be current in their registration in the System for Award Management (SAM) Database before a Government Contract award can be made.https://www.sam.gov/

Please provide: Taxpayer ID Number: ____________________________ CAGE Code (SAM):_______________________________ Point of Contact: _________________________________ Phone & Email: __________________________________

FOR ADDITIONAL INFORMATION, CONTACT:

Nicholas Moore - Phone: 309-794-5250 or Email: nicholas.m.moore@usace.army.mil

SEE ADDENDUM

(No Collect Calls)

W912EK21T0024 07-May-2021

b. TELEPHONE NUMBER

309-794-5250

8. OFFER DUE DATE/LOCAL TIME

02:00 PM 25 May 2021

5. SOLICITATION NUMBER 6. SOLICITATION ISSUE DATE

AUTHORIZED FOR LOCAL REPRODUCTION

PREVIOUS EDITION IS NOT USABLE

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ADDENDA X ARE

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CODE 10. THIS ACQUISITION IS

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TELEPHONE NO.

W912EK9. ISSUED BY

18b. SUBMIT INVOICES TO ADDRESS SHOWN IN BLOCK 18a. UNLESS BLOCK

7. FOR SOLICITATION

INFORMATION CALL:

a. NAME

NICHOLAS M MOORE

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ADDITIONAL SHEETS SUBJECT TO THE TERMS AND CONDITIONS SPECIFIED.

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96514710922463

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. YOUR OFFER ON SOLICITATION

28. CONTRACTOR IS REQUIRED TO SIGN THIS DOCUMENT AND RETURN

% FOR:SET ASIDE:UNRESTRICTED OR X

SMALL BUSINESSX

17a.CONTRACTOR/ CODE FACILITY

OFFEROR CODE

CONTRACTING DIVISION

US ARMY CORPS OF ENGINEERS 1500 ROCK ISLAND D

ROCK ISLAND IL 61201

18a. PAYMENT WILL BE MADE BY CODE

RATED ORDER UNDER

DPAS (15 CFR 700)

13a. THIS CONTRACT IS A

13b. RATING

CODE15. DELIVER TO CODE 123456 16. ADMINISTERED BY

12. DISCOUNT TERMS11. DELIVERY FOR FOB DESTINA-

TION UNLESS BLOCK IS

MARKED

SEE SCHEDULE

14. METHOD OF SOLICITATION

RFQ IFB RFPX

US ARMY ENGINEER DISTRICT, ROCK ISLAND

1500 ROCK ISLAND DRIVE

ROCK ISLAND IL 61201

TEL: FAX:

FAX:

TEL: SERVICE-DISABLED

VETERAN-OWNED

SMALL BUSINESS

8(A)

HUBZONE SMALL

BUSINESS

SIZE STANDARD:

$16,500,000

NAICS:

238220

X

OFFER DATED

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DELIVER ALL ITEMS SET FORTH OR OTHERWISE IDENTIFIED ABOVE AND ON ANY

COPIES TO ISSUING OFFICE. CONTRACTOR AGREES TO FURNISH AND

EMAIL:

TEL:

31c. DATE SIGNED

SEE SCHEDULE

SCHEDULE OF SUPPLIES/ SERVICESITEM NO. QUANTITY UNIT UNIT PRICE AMOUNT

24.22.21.19.

WOMEN-OWNED SMALL BUSINESS (WOSB)

ELIGIBLE UNDER THE WOMEN-OWNED

SMALL BUSINESS PROGRAM

EDWOSB

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SOLICITATION/CONTRACT/ORDER FOR COMMERCIAL ITEMS

(CONTINUED)

PAGE 2 OF95

ACCEPTED, AND CONFORMS TO THE CONTRACT, EXCEPT AS NOTED: ______________________________________________________

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RECEIVED INSPECTED

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AUTHORIZED FOR LOCAL REPRODUCTION

PREVIOUS EDITION IS NOT USABLE

SEE SCHEDULE

20.

SCHEDULE OF SUPPLIES/ SERVICES

21.

QUANTITY UNIT

22. 23.

UNIT PRICE

24.

AMOUNT

19.

ITEM NO.

W912EK21T0024

Section SF 1449 - CONTINUATION SHEET

SCHEDULE OF PRICES

CLIN Description Quantity Unit Price Amount

Clock Tower

AHU-205-1-1 and AHU- 205-2-1 DDCS Upgrade

1 Job

PERFORMANCE WORK STATEMENT

PERFORMANCE WORK STATEMENT

CLOCK TOWER AHU-205-1-1 AND AHU-205-2-1 DDC UPGRADE

1500 Rock Island Dr.

Rock Island, IL 61201

PART 1 PROJECT DESCRIPTION

1.1 Introduction

The U.S. Army Corps of Engineers requires services of a Contractor to perform upgrades to Clock Tower Building (building 205) AHU-205-1-1 and AHU-205-2-1 Direct Digital Control System (DDCS). The existing DDCS consists of obsolete control components that are difficult to maintain and represent a system vulnerability due to the age of the control system components.

1.2 Project Narrative

The Rock Island District Clock Tower Building 205 AHU-205-1-1 and AHU-205-2-1 DDCS are obsolete and need to be replaced with new current technology components before they fail. The contractor shall replace all Direct Digital Controls as shown and as specified in the specifications and drawings.

1.3 Objectives

The Contractor shall perform all tasks defined within this Performance Work Statement and provide all deliverables listed in Appendix A of this Contract resulting in a fully functional

DDCS.

PART 2 – GENERAL REQUIREMENTS

2.1 Period of Performance

The contract work shall be completed within ninety (90) calendar days from Notice to Proceed (NTP).

2.1.2 Hours of Operation

Business hours are typically Monday thru Friday, 7:00 AM to 5:00 PM. In order to meet period of performance, Contractor may be required to perform work on weekends.

Therefore, any work schedule to be performed outside of regular business hours and or on weekends will be coordinated with the Contracting Officer (KO) or the Contracting Officer’s Representative (COR) in writing prior to commencement.

2.1.3 Federal Holidays

The U.S Army Corps of Engineers offices are closed for the observance of Federal Holidays listed below.

New Year’s Day Labor Day Martin Luther King’s Day Columbus Day President’s Day Veterans Day Memorial Day Thanksgiving Day Independence Day Christmas Day

This includes any other day designated by Federal statute, by Executive Order or by the President’s proclamation. When a holiday falls on a non-workday, Saturday or Sunday, the holiday is typically observed on Monday (if the holiday falls on Sunday) or Friday (if the holiday falls on Saturday).

2.2 Submittals

The Contractor is required to submit all documents related to the execution of this contract to the KO in accordance with the submittal requirements outlined in section 3.1 Required Submittals, of Part 3 SPECIAL REQUIREMENTS.

2.2.1 Work Submittals

Documentation required to be submitted to the KO and approved (if required), at any phase of work during which they are completed and ready for review and acceptance.

2.3 Contractor Business Relations

The Contractor shall successfully integrate and coordinate all activity needed to execute the requirement. The Contractor shall manage the timeliness, completeness, and quality of problem identification. The Contractor shall provide corrective action plans, proposal submittals, timely identification of issues, and effective management of subcontractors. The Contractor shall seek to ensure customer satisfaction and professional and ethical behavior of all Contractor personnel.

2.4 Contractor Administration and Management

The Contractor shall designate one employee to act as the Project Manager. The Contractor shall submit in writing, the name, and title, office, and mobile telephone number of the Project Manager. The Contractor shall establish clear organizational lines of authority and responsibility to ensure effective management of the resources assigned to the requirement.

The Contractor must maintain continuity between the support operations at the job site and the Contractor's corporate offices. This individual shall have full authority to act for the Contractor on all contract matters relating to the daily operation of this Contract. This Designation of Project Manager shall be submitted within three calendar days of contract award to the Contracting Officer.

The Contractor shall establish processes and assign appropriate resources to effectively administer the requirement. The Contractor shall respond to Government requests for contractual actions in a timely fashion. The Contractor shall have a single point of contact between the Government and Contractor personnel assigned to support contracts or task orders. The Contractor shall assign work effort and maintaining proper and accurate time keeping records of personnel assigned to work on the requirement.

2.5 Subcontract Management

The Contractor shall be responsible for any subcontract management necessary to integrate work performed on this requirement and shall be responsible and accountable for subcontractor performance on this requirement. The prime contractor will manage work distribution to ensure there are no Organizational Conflict of Interest (OCI) considerations.

Contractors may add subcontractors to their team after notification to the KO or Contracting Officer Representative (COR).

2.6 Contractor Personnel

The Contractor shall accomplish the assigned work by employing and utilizing qualified personnel with appropriate combinations of education, training, and experience. The Contractor shall be required to provide personnel with that meet or exceed a combination of qualifications and experience. Personnel requirements can be found in 3.2 PERSONNEL QUALIFICATIONS, of PART 3 SPECIAL REQUIREMENTS. The Contractor shall match personnel skills to the work or task with a minimum of under/over employment of resources.

2.7 Contractor Schedule of Services

The Contractor shall perform tasks according to a detailed written performance schedule and plan which is to be prepared by the Contractor, submitted and accepted by the COR three (3) calendar days prior to commencement of work. The schedule shall include the date the work is to be initiated and completed as well as the amount of work projected to be completed daily. The schedule shall identify the hours when the Contractor will perform the work. Any modification to the Contractor’s Schedule of Services must be submitted in writing to the KO or COR, for review and approval prior to incorporating any proposed changes.

2.8 Quality Control

The Contractor shall develop and maintain an effective quality control program to ensure services are performed in accordance with this PWS. The Contractor shall develop and implement procedures to identify, prevent, and ensure non-recurrence of defective services.

The Contractor’s quality control program is the means by which he assures himself that his work complies with the requirement of the contract.

2.8.1 Quality Assurance

The government shall evaluate the Contractor’s performance under this contract in accordance with the Performance Requirement Summary (PRS). Additionally, the Government will use a Quality Assurance Surveillance Plan (QASP), in the inspection of the services. This plan is primarily focused on what the Government must do to ensure that the Contractor has performed in accordance with the performance standards. It defines how the performance standards will be applied, the frequency of surveillance, and the minimum acceptable defect rate(s).

2.8.2 Quality Assurance Surveillance Plan

The Government shall monitor the Contractor's performance under this contract in accordance with the Government's QASP. The QASP for work defined herein is in Appendix B of this contract.

2.9 Government Inspection

All work to be performed under this contract shall conform to the requirements of this contract and shall be approved by the KO. The presence or absence of Government personnel shall not relieve the Contractor of responsibility for the proper execution of the work in accordance with this contract.

2.10 Salvage Material and Equipment

Remove materials and equipment that are indicated to be removed by the Contractor. The Government has the right to all salvage material and equipment including but not limited to items identified in the PWS. The contractor shall provide a list of material and equipment that will be removed to the Government. The list of material and equipment shall be approved by the Contracting Officer prior to the removal of the material and equipment.

PART 3 SPECIAL REQUIREMENTS

3.1 Required Submittals

The approving authority for submittals and deliverables rests with the KO and his/her Authorized Representative(s). The Contractor shall be responsible for ensuring that all submittals and deliverables are in compliance with the contract requirements. All required submittals and deliverables are defined herein and listed on the SUBMITTALS AND DELIVERABLE LIST located in Appendix A and within PART 3 SPECIAL REQUIREMENTS of this contract.

3.2 Personnel Requirements

The Contractor shall employ only competent and satisfactory personnel and shall provide a sufficient number of employees to perform the required services efficiently. The Contractor shall be responsible for complying with local, state, and federal codes, legislation procedures, and regulations affecting work in their professional area.

3.3 Equipment Requirements

Electrical Equipment - All electrical extension cords shall be properly sized for the equipment load and placed away from vehicular or pedestrian traffic. All connections between the extension cords and related equipment (e.g., tools, machine, or addition extension cords) shall be tightly fastened with no exposed electrical contacts. All extension cords shall have and use proper electrical grounding. Power tools and/or extension cords used in damp areas shall be plugged into a Ground Fault Circuit Interrupter (GFCI) switch to immediately shutdown when a short to ground is detected.

3.4 Open Flame Permit

The Contractor shall receive a Flame Permit from the Rock Island Arsenal prior to any open flame activities. The contractor shall call the Rock Island Police at 309-794-6116 to schedule the fire department to provide a flame permit.

3.5 Outages

The Contractor is required to maintain DDCS control at all-time except during requested outages. The contractor shall not leave the DDCS inoperable while not physically onsite.

3.6 Government Furnished Materials

Hot and cold water and electricity will be provided from existing outlets.

PART 4 PERFORMANCE REQUIREMENTS

4.1 Locations

The DDCS upgrade work area is at Clock Tower Building 205 on the Rock Island Arsenal address is 1500 Rock Island Dr. Rock Island IL, 61201.

4.2 205-1-1 DDC UPGRADE

SUBMITTALS

SD-02 Shop Drawings Control System:

Submit the entire control system, to consist of a complete list of equipment and materials, including manufacturers catalog data sheets and installation instructions. Submit complete wiring and schematic diagrams, software descriptions, calculations, and any other details required to demonstrate that the system has been coordinated and will properly function as a system. Show terminal identification for all control wiring. Include a complete written Sequence of Operation along with the printouts.

SD-03 Product Data

DDC System:

a. Submit catalog data sheets, wiring diagrams, and point lists. The point lists to include the point/object name as used by the system, the object/point type; i.e. analog, binary, input, output, etc., the point/object description; i.e., what it is, and the data structure type; i.e. Boolean, integer, floating point, etc.

b. Include a complete point list of all connected points to the DDC system.

SUMMARY

a. Use Direct Digital Controls as shown and as specified. Attached drawings are diagrammatic only.

b. Requirements as specified which are not consistent with the manufacturer's specifications on product provided by the Direct Digital Control System (DDCS) contractor to be identified and immediately notify the Contracting Officer. Requirements and specifications provided will not relieve the Contractor of the responsibility for delivering a fully functional DDCS.

PRODUCTS

4.3 GENERAL

Provide with a network of interoperable, stand-alone digital controllers (IDC) and other devices as specified. Not every device listed will be required as a part of this project.

4.4 OPEN, INTEROPERABLE, INTEGRATED ARCHITECTURES

Provide a peer-to-peer networked, distributed control system based on the BACnet communication protocols. Provide a system that is comprised of all BACnet devices.

Provide all IDC's, whether of the ASC or PCU type, by one manufacturer. Systems based on IDC's from multiple manufacturers is prohibited and will not be acceptable.

4.5 INTEROPERABLE DIGITAL CONTROLLERS (IDC)

a. Provide as microprocessor based Interoperable BACnet controllers. Where possible, make the applicable BACnet Testing Laboratory (BTL) interoperability logo visible on each product delivered.

b. Provide IDC's and ancillary devices as specified and indicated, and as necessary to perform the sequences of operation. The following equipment to be controlled:

(1) Air Handling Units (fans, valve and damper actuators, sensors.

etc.).

(2) Return Fans for ventilation and pressurization control.

c. All controllers to be true "peer-to-peer" communicating devices. Components or controllers requiring "polling" by a host to pass data is prohibited. Where applicable, control to be accomplished using BTL based devices where the application has BACnet BIBB defined. Where BTL devices are not available for a particular application, such as some freely programmable controllers, for BACnet devices, the Contractor to provide complete product technical documentation including a complete listing of BACnet devices, BACnet objects, object types and object instances. The Contractor to provide all programming and documentation necessary to set up and configure the supplied devices per the specified sequences of operation.

d. The Contractor to route the BACnet MSTP network trunk to the Network Area Controller (NAC) as indicated. Supply BACnet devices using the MSTP communications method. Preferred BACnet MSTP wire jacket color is bright green however any color that is unique and distinguishable from all other communication wiring at the facility is acceptable.

e. Provide all scheduling, alarming, trending, and network management for the BACnet devices at the server level.

f. Provide all IDCs used for terminal control, i.e., VAV Fan Coil, Unit Vent, etc., as either fully programmable or configurable and, always maintain their BTL certification, if so certified. All IDCs used for central plant control, i.e., AHU, Chillers, Boilers, etc., to be fully programmable. Store all control sequences within or programmed into the IDC in non-volatile memory, which is not dependent upon the presence of a battery, to be retained. Provide all IDCs capable of program upload as well as download. IDCs that cannot have their program uploaded to the programming tool software are prohibited.

g. The Contractor supplying the BACnet IDC's to provide, at a minimum, the following documentation for each device: Network configuration parameters (nci, nco); name and type

h. BACnet Object Type, Object Instance, Object Name and Object Description.

The Contractor supplying the IDCs to provide graphical printouts of all/each IDC programming. Include clear indication of how all input and output network variables interact with the controller process.

i. The Contractor to ensure that the proper BACnet objects are provided at the server level and are exposed for connection to them by a future System Integrator, as required by the point charts (see paragraph "POINT LISTS") and as needed to execute the control, monitoring, alarming, display and logging, required by the point charts and the sequence of operation. Refer to the software point charts for the required functionality (read-only, write-only, read-write) for each data point. Use of manufacturer specific BACnet objects is prohibited, unless software is provided to allow the use of them by any third-party network management and user interface application. The Contractor to provide all point data and documentation to allow a future System Integrator to perform a compatibility review.

4.6 CONTROL SYSTEM HARDWARE

4.6.1 Interoperable Digital Controllers

4.6.1.1 BACnet Controllers Requirements

a. Provide microprocessor based Interoperable BACnet Controllers in accordance with ASHRAE 135. The application control program to be resident within the same enclosure as the input/output circuitry, which translates the sensor signals. The Contractor to provide a PICS document showing the installed systems compliance level in accordance with ASHRAE 135.

b. The IDCs to communicate with the NAC via an MSTP connection at a baud rate of not less than 19.2k baud.

4.6.1.2 Application Specific Controller (ASC)

a. Provide each terminal unit with a BACnet-based DDC Application Specific Controller (ASC) designed to provide the specified sequences.

b. Each ASC to perform all intended temperature control functions in a 'standalone' mode if a loss of communications occurs.

c. Factory-mount the completed ASC including accessory devices such as relays, transducers, power supplies, etc., wire and house in a NEMA 1 enclosure or as required by the location and local code requirements.

d. Base each ASC on peer-to-peer communications.

e. Provide all ASC's as self-sufficient units to maximize reliability and include internal 'soft' clock, operating systems, communication timing and interrupt controls, and suitable for the specified applications.

f. In the event of a power outage or controller reset, each ASC to enter a preprogrammed state on power re-application. Upon application of power to the ASC, all control conditions will start from an 'off' / 'closed' position or the default state. Maintain this state for an automatically adjusted amount of time. Once this time delay has passed, resume the ASC control sequence according to current values.

g. Digital Inputs

(1) Provide all with over voltage protected.

(2) Types supported by the CU:

(a) Normally open contacts (24V and 120V).

(b) Normally closed contacts (24V and 120V).

(c) Current/no current.

(d) Voltage/no voltage.

(e) Pulse/Totalizer contacts.

h. Digital Outputs

(1) Provide as 24-volt AC, current sinking, 0.5-amp opto-isolated triacs.

(2) Provide capable of handling maintained as well as pulsed outputs for momentary or magnetic latching circuits. Provide the possibility to configure outputs for 3-mode control (fast-slow-off) and 2-mode control.

i. Analog Inputs

(1) Provide over voltage protected.

(2) Provide the analog to digital resolutions a minimum of 10 bit.

(3) Provide to accept the following temperature types: 10K Ohm thermistor, 20K Ohm thermistor, or 1K Ohm RTD.

(4) Provide as configurable to accept a wide range of inputs including:

4-20mA, 1-5Vdc, 2-10Vdc, etc.

j. Analog Outputs

(1) The ASC to accommodate true analog outputs. Accommodate voltage (0-10V) and current (4-20 mA) outputs.

(2) Provide with proportional current or voltage type.

(3) Provide the digital to analog resolution a minimum of 10 bit.

(4) Provide configurable outputs so that 0-100 percent output commands can represent any portion of the output voltage/current range.

(5) Outputs reversible outputs so that an increasing output command yields a decreasing electrical signal.

(6) Power all analog output-controlled devices (valve actuators, damper actuators, etc.) by 24 VAC and use a 0-10 (or 2-10) VDC signal. Floating motors, two position, or three position (or any stepped) type devices are prohibited.

k. In addition to local physical or internal I/O, each ASC to support distributed or 'bound' I/O. This bound I/O can be used to allow the ASC to provide I/O data to another controller on the controller network or to allow another controller to provide data to the controlling ASC, in a peer-to-peer fashion.

l. Incorporate the following modes of control into each ASC:

(1) Occupied: A mode designed for normal occupied control of an area during regular business hours. This mode to have a unique heating and cooling setpoints associated with it.

(2) Unoccupied: A mode designed for afterhours control of an area. This mode to have a unique heating and cooling set points associated with it.

(3) Override: A mode designed to invoke normal occupied control during afterhours of an area. This mode to use the occupied heating and cooling set points.

(4) Economy: A mode designed for normal occupied times when energy demand usage is high and control setpoints need to be adjusted for lower energy use. This mode to have a unique heating and cooling set points associated with it.

(5) Morning Warm-Up on Units with an Outdoor Air Economizer: A mode designed for the pre-heat/pre-cool time before normal occupancy occurs. This mode to allow heating or cooling as required by the occupied setpoints but it will prevent outdoor air from entering the space. The outdoor air will move to its minimum position once the morning warm-up mode is over and the occupied mode is activated.

(6) Morning Warm-Up on VAV units: A mode designed for the pre-heat/pre-cool time before normal occupancy occurs. This mode will allow heating or cooling as required by the occupied set points, but it will prevent the VAV box from maintaining a minimum air flow until the morning warm-up mode is over and the occupied mode is activated.

m. Provide VAV box ASC's with an integral damper actuator and of the manufacturer's standard VAV box controller.

n. The Contractor to verify that VAV box controllers will physically fit into the VAV box controls enclosure, and that the controllers can register the expected minimum and maximum flow rates using the flow probe provided by the VAV box manufacturer.

4.6.1.3 Programmable Control Units

a. Provide a BACnet based DDC PProgrammable Control Unit (PCU) where required to perform the sequence of operation. Provide the PCU fully programmable.

The controller to store all specific control sequences and program settings in non-volatile memory.

b. Each PCU to perform all intended temperature control functions in a 'standalone' mode should the unit incur a loss of communications.

c. Factory-mount the completed PCU including accessory devices such as relay,

d. Each PCU to allow Peer-to-Peer communications.

e. Provide all PCU's as self-sufficient units to maximize reliability and include

f. In the event of a power outage or controller reset, each PCU to enter a preprogrammed state on power re-application. Upon application of power to the PCU, all control conditions will start from an 'off' / 'closed' position or the default state.

Maintain this state for an automatically adjusted amount of time. Once this time delay has passed, resume PCU control sequence in accordance with current values.

g. Provide all PCU's with a communications port to allow connection of any industry standard laptop PC and programming tools. Program access via this communications port allows direct field modification of the control logic and configuration parameters.

h. Digital Inputs

(1) Provide with over voltage protection.

i. Digital Outputs

(2) Provide as capable of handling maintained as well as pulsed outputs for

j. Analog Inputs

(3) Analog to accept the following temperature types: 10K Ohm

k. Analog Outputs

(1) The PCU to accommodate true analog outputs. Accommodate

(2) Provide as proportional current or voltage type.

(3) Provide to analog resolution a minimum of 10 bit.

(4) Provide as configurable so that 0-100 percent output command scan represent any portion of the output voltage/current range.

(5) Provide as reversible so that an increasing output command yields a decreasing electrical signal.

(6) Provide controlled devices (valve actuators, damper actuators, etc.)

powered by 24 VAC and use a 0-10 (or 2-10) VDC signal. Floating motors, two position, or three position (or any stepped) type devices are prohibited.

l. In addition to local physical or internal I/O, each PCU to support distributed or 'bound' I/O. This bound I/O can be used to allow the PCU to provide I/O data to data to the controlling PCU, in a peer-to-peer fashion.

m. Incorporate the following modes of control into each PCU:

during regular business hours. This mode to have unique heating and cooling setpoints associated with it.

(2) Unoccupied: A mode designed for afterhours control of an area.

This mode to have unique heating and cooling setpoints associated with it.

afterhours of an area. This mode to use the occupied heating and cooling setpoints.

energy use. This mode to have unique heating and cooling setpoints

(5) Morning Warm-Up on units with an Outdoor Air Economizer: A mode mode to allow heating or cooling as required by the occupied setpoints but it will prevent outdoor air from entering the space. The outdoor air will move to

(6) Morning Warm-Up on VAV Units: A mode designed for the pre-heat/pre-cool time before normal occupancy occurs. This mode to allow heating or cooling as required by the occupied set points but it will prevent the VAV box from maintaining a minimum airflow until the morning warm-up mode is over and the occupied mode is activated.

4.6.2 Temperature Sensors

4.6.2.1 Wall Mount Room Sensors

Each room sensor to contain a 10,000-ohm thermistor or 1,000-ohm platinum RTD temperature sensing element with an accuracy of plus or minus 0.4 degrees F. Provide each sensor with temperature indication to the digital controller; provide the capability for a software-limited set point adjustment and operation override capability. An integral LCD to annunciate current room temperature and set point as well as override status indication. In addition, the thermostat to include a port for connection of the portable operator's terminal as specified.

4.6.2.2 Duct Mount, Pipe Mount, and Outside Air Temperature Sensors

Provide 10,000-ohm thermistor or 1,000-ohm platinum RTD temperature sensors with an accuracy of plus or minus 0.4 degrees F. Outside air sensors to include an integral sun shield.

a. Mount duct mount sensors in a hand box through a hole in the duct and positioned to allow easy access to repair or for replacement. Use a neoprene grommet (seal tight fitting and mounting plate) on the sensor assembly to prevent air leaks.

b. Provide duct sensors as insertion type and constructed as a complete assembly including lock nut and mounting plate. Construct duct sensors probe of 304 stainless steel.

4.6.2.3 Thermowells

a. When thermowells are required, provide the sensor and well as a complete assembly including well head and conduit fitting.

b. Pressure rated thermowells and constructed in accordance with the system working pressure.

c. Mount thermowells and sensors in a thread-o-let or 1/2-inch NPT saddle and allow easy access to the sensor for repair or replacement.

(1) Construct thermowells of the following materials: Chilled and Hot Water copper piping; brass.

(2) Chilled and Hot Water steel piping: stainless steel.

(3) Steam: 316 stainless steel.

(4) Brine (salt solutions): marine grade stainless steel.

4.6.2.4 Averaging Duct Type Sensors

a. Where indicated and the points lists, provide averaging type duct sensors.

10,000-ohm thermistor or 1,000-ohm platinum RTD temperature sensors with an accuracy of plus or minus 0.4 degrees F are acceptable. Provide sensor as multi-point sensitive through the length of the temperature conducting tubing. Configure the sensors in a series / parallel method which creates an end result of total average resistance equal to the same span as a standard sensor.

b. Provide capillary supports at the sides of the duct to support the sensing element.

4.6.3 Relative Humidity Sensors/Transmitters

a. Provide sensor as solid state, resistance type relative humidity sensor of the Bulk Polymer Design. Provide the sensor element as washable and resists surface contaminations.

b. Equip humidity transmitter with non-interactive span and zero adjustments, a 2-wire isolated loop powered, 4-20ma, 0-10.0 VDC linear proportional output.

c. The humidity transmitter in accordance with the following overall accuracy including lead loss and A to D conversion.

(1) Room Type Sensor: plus or minus 2 percent RH

(2) Duct Type Sensor: plus or minus 2 percent RH

d. Install outside air relative humidity sensors in a rain proof, perforated cover.

Install the transmitter in a NEMA 3R enclosure with conduit fittings and stainless-steel bushings.

e. Provide a single point humidity calibrator, if required, for field calibration.

Transmitters to ship factory pre-calibrated.

f. Construct duct type sensing probes of 304 stainless steel and equipped with a neoprene grommet, bushings, and a mounting bracket.

4.6.4 Differential Pressure Transmitters and Accessories

4.6.4.1 General Air and Water Pressure Transmitter Requirements

a. Construct pressure transmitters to withstand 100 percent pressure over-range without damage and to hold calibrated accuracy when subject to a momentary 40 percent over-range input.

b. Provide pressure transmitters with the option to transmit a 0 to 5V dc, 0 to 10V dc, or 4 to 20 mA output signal. Size differential pressure transmitters used for flow measurement to the flow sensing device and supplied with shutoff and bleed valves in the high and low sensing pick-up lines (3 valve manifolds).

c. Provide a minimum of a NEMA 1 housing for the transmitter. Locate transmitters in accessible local control panels wherever possible.

d. Duct sensing pressure applications where the velocity exceeds 1500 fpm to use a static pressure traverse probes.

4.6.4.2 Low Air Pressure Applications (0 to 0.5 Inches Water Column)

a. Provide capable of transmitting a linear electronic signal proportional to the differential of the room and reference static pressure input signals with the following minimum performance specifications.

(1) Span: Not greater than two times the design space DP.

(2) Accuracy: Plus or minus 0.5 percent of F.S.

(3) Dead Band: Less than 0.3 percent of output.

(4) Repeatability: Within 0.2 percent of output.

(5) Linearity: Plus or minus 0.2 percent of span.

(6) Response: Less than one second for full span input.

(7) Temperature Stability: Less than 0.10 percent output shift per degree F change.

b. Provide the transmitter with variable capacitance sensor technology and immune to shock and vibration.

4.6.4.3 Medium to High Air Pressure Applications (0.5 to 10 inches Water Column)

Provide the pressure transmitter similar to the Low Air Pressure Transmitter except the performance specifications are not as severe. Provide differential pressure transmitters which meet the following performance requirements.

a. Zero & span: (Percent F.S./Deg. F): .10 percent including linearity, hysteresis and repeatability

b. Accuracy: One percent F.S. (best straight line)

c. Static Pressure Effect: 0.5 percent F.S. (to 100 psi)

d. Thermal Effects: < plus or minus.10 percent F.S./Deg. F. over 40 degrees F to 105 degrees F. (calibrated at 71.5 degrees F.)

4.6.4.4 Low Differential, Water Pressure Applications (0 to 20 Inches Water Column)

a. Provide the differential pressure transmitter of industrial quality and transmit a linear, 4 to 20 mA output in response to variation of flow meter differential pressure or water pressure sensing points.

b. Provide the differential pressure transmitter with non-interactive zero and span adjustments adjustable from the outside cover and meet the following performance specifications.

(1) 0 - 40 Inches Water Column input differential pressure range

(2) 4 - 20 mA output

(3) Maintain accuracy up to 20 to 1 ratio turndown

(4) Reference Accuracy: 0.2 percent of full span

4.6.4.5 Medium to High Differential Water Pressure Applications (1 psi to 100 psi)

Provide the differential pressure transmitter meeting the low-pressure transmitter specifications except the following:

a. Differential pressure range 1 psi to 100 psi.

b. Reference Accuracy: Plus or minus l percent of full span (includes non-linearity, hysteresis, and repeatability).

4.6.4.6 Low Differential, Water Pressure Applications (0 to 20 Inches Water Column)

4.6.4.7 Medium to High Differential Water Pressure Applications (1 psi to 100 psi)

b. Reference Accuracy: Plus or minus l percent of full span (includes non-linearity, hysteresis, and repeatability)

4.6.5 Switches

4.6.5.1 Differential Pressure Switches

a. Provide all pressure sensing elements as corrosion resistant. Provide pressure sensing elements as bourdon tubes, bellows, or diaphragm type. Provide units with tamper-proof adjustable range and differential pressure settings.

b. Provide pressure sensor switch contacts as snap action micro-switch type. Sensor assembly to operate automatically and reset automatically when conditions return to normal. Protect the complete sensor assembly against vibration at all critical movement pivots, slides and so forth.

c. Vent differential pressure switches to withstand a 50 percent increase in working pressure without loss of calibration.

4.6.5.2 Electric Low Limit Thermostat (Freeze Stat)

a. Duct type, fixed 5 degrees F differential, range 32 to 59 degrees F. Provide sensing element as a 20-foot-long capillary tube responding to the lowest temperature sensed along any 12 inches of bulb length. Provide 120/240 volts AC, rated for 10 amps at 120 volts full load switches. Unit to manually reset. Provide one low limit thermostat for each 6.5 square feet or fraction thereof of coil surface area.

b. Provide DPST switches, 1 NO, 1 NC contact.

4.6.5.3 Water Flow Switches

Provide UL listed, suitable for all service application conditions. Body minimum working pressure rating to equal or exceed service pressure. Provide switch electrical rating as 230 volts AC 3.7 ampere, 115 volts AC 7.4 ampere, and 125 VAC 115-230 VAC AC Pilot duty. Provide unit with two SPDT switches. Field adjust actuating flow rated for the specified and indicated service. Switch location to preclude exposure to turbulent or pulsating flow conditions. Flow switch is not to cause pressure drop exceeding 2 psi at maximum system flow rate.

4.6.5.4 Strap-On Aquastat

Provide UL listed, provided with a suitable removable spring clip for attaching aquastat to pipe and a snap-action SPDT switch. Switch setpoint as indicated. Provide electrical rating as 5 amperes, 120 VAC.

4.6.5.5 Current Sensitive Switches

Provide solid state, split core current switches that operates when the current level (sensed by the internal current transformer) exceeds the adjustable trip point. Current switch to include an integral LED for indication of trip condition and a current level below trip set point.

4.6.6 Flow, Pressure, and Electrical Measuring Apparatus

4.6.6.1 Traverse Probe Air Flow Measuring Stations

a. Provide dual manifolded, cylindrical, type constructed of 3003 extruded aluminum with an anodized finish to eliminate surface pitting and unnecessary air friction. Provide the multiple total pressure manifold with sensors located along the stagnation plane of the approaching air flow and without the physical presence of forward projecting sensors into the airstream. The static pressure manifold to incorporate dual offset static tips on opposing sides of the averaging manifold so as to be insensitive to flow-angle variations of as much as plus or minus 10 degrees F in the approaching airstream.

b. The air flow traverse probe is not to induce a measurable pressure drop, nor will the sound level within the duct be amplified by its singular or multiple presence in the airstream. Each airflow measuring probe to contain multiple total and static pressure sensors placed at equal distances along the probe length. The number of sensors on each probe and the quantity of probes used at each installation to comply with the ASHRAE Standards for duct traversing.

c. Provide accurate to plus or minus 25 percent of the measured airflow range down to 0.25-inch Water Column static pressure.

d. Complete each flow measuring station with a dedicated microprocessor with a 4-line, 80-character, Alpha Numeric display and full function keypad. Provide the panel fully programmable and display calculated liters per minute directly on a LED monitor on the panel face.

e. Provide 24-volt 1 phase power to each flow measuring station.

4.6.6.2 Shielded Static Pressure Sensor

a. Provide for each zone where required a shielded static pressure sensor suitable for ceiling surface mounting, complete with multiple sensing ports, pressure impulse suppression chamber with minimum volume of 49 cubic inches, airflow shielding, and 3/8 inch compression takeoff fittings, all contained in a welded stainless steel casing, with polish finish on the exposed surfaces.

b. Provide probes capable of sensing the static pressure in the proximity of the sensor to within 1 percent of the actual pressure value while being subjected to a maximum airflow of 985 feet per minute from a radial source.

c. Use shielded static sensing devices for both reference and space pressure sensing.

d. Equip pressure sensors used for outside air pressure reference purposes with a conduit seal for pneumatic tubing and bushings for a weather tight installation.

4.6.6.3 Static Pressure Traverse Probe

a. Provide multipoint traverse probes in the duct at each point where static pressure sensing is required.

b. Provide each duct static traverse probe with multiple static pressure sensors located along the exterior surface of the cylindrical probe. Pressure sensing points are not to protrude beyond the surface of the probe.

c. Provide duct static traverse probe as 304 stainless steel construction and (except for 3/4-inch diameter probes with lengths of 24 inches or less) as complete with threaded end support rod, sealing washer and nut, and mounting plate with gasket and static pressure signal fitting. Provide static traverse probe capable of producing a steady, non-pulsating signal of standard static pressure without need for correction factors, with an instrument accuracy of 21.

4.6.7 Relays and Contactors

a. Provide general purpose relays, other than those associated with digital output cards, enclosed type and protected by a heat and shock resistant duct cover. Provide the number of contacts and operational function as required.

b. Solid State Relays (SSR): Provide input/output isolation greater than lOE9 ohms with a breakdown voltage of 1500V root mean square or greater at 60 Hz.

Provide contact life as 10 x 10 E6 operations or greater. The ambient temperature range of SSRs to be minus 18 to plus 140 degrees F. Input impedance is not to be less than 500 ohms. Rate relays for the application. Operating and release time to be for 100 milliseconds or less. Provide transient suppression as an integral part of the relay.

c. Contactors: Provide single coil, electrically operated, mechanically held type. Obtain positive locking without the use of hooks, latches, or semi-permanent magnets. Provide double-break-silver-to-silver type protected by arcing contacts. The number of contacts and rating as selected for the application. Operating and release times to be 100 milliseconds or less. Equip contactors with coil transient suppression devices.

4.6.8 Temperature Control Panels

a. Furnish temperature control panels of code gauge steel with locking doors for mounting all devices as shown. Panels in accordance with NEMA 1 standards, unless otherwise indicated.

b. Control panels in accordance with UL 508A and certified.

c. Connect all external wiring to terminal strips mounted within the panel.

d. Provide engraved phenolic nameplates identifying all devices mounted on the face of control panels and the identification number of the panel.

e. Furnish a complete set of 'as-built' control drawings (relating to the controls within that panel) within each control panel.

4.6.9 Air Quality Sensors

Provide a power supply for each sensor. Provide photo-acoustic type CO2 sensors with integral transducers and linear output. The devices to read CO2 concentrations between 0 and 2000 parts per million with full scale accuracy of at least plus or minus 100 parts per million.

4.6.10 Control Valves

4.6.10.1 Valve Assembly

Design valve bodies for 125 psig minimum working pressure or 150 percent of the operating pressure, whichever is greater. Provide valve stems as Type 316 stainless steel. Rate valve leakage as 0.01 percent of rated Cv value. Class 125 copper alloy valve bodies and Class 150 steel or stainless-steel valves in accordance with ASME B16.5. Cast iron valve components in accordance with ASTM A126 Class B or C. Unless indicated otherwise, provide modulating valves sized for 2 psi minimum and 4 psi maximum differential across the valve at the design flow rate.

4.6.10.2 Butterfly Valves

Provide threaded lug type suitable for dead-end service and for modulation to the fully-closed position, with stainless steel shafts supported by bearings, non-corrosive discs geometrically interlocked with or bolted to the shaft (no pins), and EPDM seats suitable for temperatures from minus 20 degrees F to plus 250 degrees F. Provide as a means of manual operation independent of the actuator.

4.6.10.3 Two-Way Valves

Provide as equal percentage characteristic.

4.6.10.4 Three-Way Valves

4.6.10.5 Valves for Chilled Water, Condenser Water, and Glycol Fluid Service

a. Provide bodies for valves 1-1/2 inches and smaller as brass or bronze, with threaded or union ends. Provide bodies for valves from 2 inches to 3 inches inclusive as brass, bronze, or iron. Provide bodies for 2-inch valves with threaded connections.

Provide bodies for valves from 2-1/2 to 3 inches with flanged connections.

b. Provide internal valve trim as brass or bronze, except provide valve stems as stainless steel.

c. Unless indicated otherwise, provide modulating valves sized for 2 psi minimum and 4 psi maximum differential across the valve at the design flow rate.

d. Provide valves 4 inches and larger as butterfly valves, unless indicated otherwise.

4.6.10.6 Valves for Hot Water Service

Valves for hot water service below 250 Degrees F:

b. Provide internal trim (including seats, seat rings, modulation plugs, valve stems, and springs) of valves controlling water above 210 degrees F as Type 316 stainless steel.

c. Provide internal trim for valves controlling water 210 degrees F or less as brass or bronze. Provide valve stems as Type 316 stainless steel.

d. Provide non-metallic parts of hot water control valves as suitable for a minimum continuous operating temperature of 250 degrees F or 50 degrees F above the system design temperature, whichever is higher.

e. Unless indicated otherwise, provide modulating valves sized for 2 psi minimum and 4 psi maximum differential across the valve at the design flow rate.

f. Provide valves 4 inches and larger as butterfly valves, unless indicated

4.6.11 Direct-Drive Electric Actuators

Provide direct-drive electric actuators for all control applications, except where indicated otherwise. Each actuator to deliver the torque required for continuous uniform motion and have internal end switches to limit the travel, or capable of withstanding continuous stalling without damage. Actuators to function properly within 85 to 110 percent of rated line voltage. Provide actuators with hardened steel running shafts and gears of steel or copper alloy. Fiber or reinforced nylon gears may be used for torques less than 16 inch-pounds. Provide two-position actuators of single direction, spring return, or reversing type. Provide modulating actuators capable of stopping at any point in the cycle and starting in either direction from any point. Equip actuators with a switch for reversing direction, and a button to disengage the clutch to allow manual adjustments. Provide the actuator with a hand crank for manual adjustments, as applicable. Thermal type actuators may only be used on terminal fan coil units, terminal VAV units, convectors, and unit heaters.

Provide spring return actuators on all control dampers and all control valves except terminal fan coil units, terminal VAV units, convectors, and unit heaters, unless indicated otherwise. Provide each actuator with distinct markings indicating the full-open and full-closed position, and the points in-between.

4.6.12 Control Dampers

a. Provide factory manufactured galvanized steel dampers where indicated.

Control dampers in accordance with SMACNA 1966 except as modified or supplemented by this specification. Verify published damper leakage rates and respective pressure drops by tests in accordance with AMCA 500-D requirements.

b. Provide damper assembly frames constructed of 0.064-inch minimum…