Attachment 6 DESIGN-PHASE COMMISSIONING PLAN.pdf

National Agricultural Library Cooling

Tower Replacement

National Agricultural Library (NAL)

Beltsville, MD

DESIGN-PHASE COMMISSIONING PLAN

11 July 2024

Contract Number: 12305B21D0016

Order Number: 1232SA22F0197

Our Ref: 212.007 7900 Westpark Dr., Suite A405

McLean, VA 22102

Cooling Tower Replacement |12305B21D0016 National Agricultural Library | Beltsville, MD

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TABLE OF CONTENTS

Chapter 1

OVERVIEW ........................................................................................................................... 1-1

Chapter 2

COMMISSIONING TEAM ..................................................................................................... 2-1

Chapter 3

REFERENCE DOCUMENTS ................................................................................................... 3-1

Chapter 4

COMMISSIONING PROCESS ................................................................................................ 4-1

Appendix A

DESIGN REVIEW ..................................................................................................................... A

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CHAPTER 1

OVERVIEW

1. Abbreviations and Definitions

A/E Architect and Design Engineers CA Commissioning Authority Cx Commissioning CxPlan Commissioning Plan Document FPT Functional Performance Test PFC Pre-functional Checklist PM Project Manager

2. Purpose of the Commissioning Plan

.1 The purpose of the commissioning plan is to provide direction for the commissioning process during the entire project, from design to construction. In the design phase, the objectives are to:

a. Ensure design and operation intent are documented.

b. Assist the owner and design team in shaping the construction-phase commissioning requirements to limit change orders.

c. Ensure construction-phase commissioning activities are clearly communicated in the contract documents.

.2 This plan does not provide a detailed explanation of the testing procedures.

Additionally, this plan does not provide extensive narrative on all commissioning concepts.

.3 This project will be commissioned under the guidelines set forth by the ACG (AABC Commissioning Group.)

3. Scope

.1 Provide (2) design reviews. One at 75% and one at Final.

4. Commissioned Systems

.1 Cooling towers and condenser water pumps

.2 VFDs

.3 HVAC controls

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CHAPTER 2

COMMISSIONING TEAM

1. The members of the design-phase commissioning team consist of the following members.

The Owner’s facilities staff may also be a member of the Commissioning Team. Refer to the tables below for specifics on this project.

Table 2-1 – Owner: USDA

Name Position Phone Email

Jim Glick COR 443-310-0559 James.glick@usda.gov

Angie Wingert CS 443-962-7865 angela.wingert@usda.gov

Table 2-2 – End-user: National Agricultural Library

Name Position Phone Email

Romando Green Facility Operation

Specialist 301-504-5843 Romando.Green@usda.gov

David Doyle Facility Engineer 240-791-0638 david.doyle@usda.gov

Table 2-3 – A/E: Summer Consultants, Inc.

Anne Juran Project Manager 703-556-8820 juran@summerconsultants.com

Lee Benzel Mechanical Engineer 703-556-8820 benzel@summerconsultants.com

Tilahun Felate Electrical Engineer 703-556-8820 felate@summerconsultants.com

Table 2-4 – CA: Summer Consultants, Inc.

Omar Qasmieh CxA 703-556-8820 qasmieh@summerconsultants.com

Pete Collat CxA 703-556-8820 collat@summerconsultants.com

2. General Management Plan

.1 The CA is a subcontractor to USDA. The CA directs and coordinates the commissioning activities and reports to the Owner’s representative and the members of the commissioning team.

3. Roles and Responsibilities

.1 Owner: Develops Owner’s Project Requirements (OPR).

mailto:James.glick@usda.gov mailto:angela.wingert@usda.gov tel:(301)-504-5843 mailto:Romando.Green@usda.gov

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.2 CA: Coordinates the Cx process. Develops and updates the Cx Plan. Reviews design documents for commissionability, compliance with OPR, and scope of construction-phase commissioning work.

.3 A/E: Assists owner with OPR. Develops and updates the Basis of Design (BOD).

Incorporates CA design review comments. Incorporates commissioning requirements into contract documents.

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CHAPTER 3

REFERENCE DOCUMENTS

1. Specifications

2. Drawings

3. ACG Commissioning Guideline

4. ASHRAE Standard 202-2018

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CHAPTER 4

COMMISSIONING PROCESS

1. Design Phase

.1 Basis of Design documentation

a. The A/E will develop the Basis of Design (BOD). This document records all processes and assumptions behind design decisions.

b. This document is not part of the contract documents but rather is in support of

it. It provides the reasoning behind the contract documents.

.2 Commissioning Specifications

a. The A/E will develop the commissioning specifications, with support from the owner and CA.

b. The specification sets forth the scope of work for the construction-phase CA.

.3 Design Review

a. For each discipline, the Commissioning Specialist reviews the Basis of Design, calculations, specifications, and drawings.

b. The project is reviewed to make sure the design intent satisfies the OPR.

c. The documents are reviewed for commissionability; that is, confirm everything is in place such that commissioning can occur. This would include consideration for items such as maintenance access space, access doors, sensors, indicators, meters, shut-off valves, etc.

d. Any controls elements are reviewed so that all information needed to write the Functional Performance Tests is included. The drawings are cross-checked with the specifications for items such as sensor accuracy.

2. Construction Phase

.1 Meetings

a. Pre-Commissioning Meeting: A pre-commissioning meeting will be held to introduce all parties, review the commissioning process, and determine management and reporting lines. The meeting provides the CA with additional information needed to finalize the Cx Plan, including the commissioning schedule.

b. Equipment Startup Coordination Meeting: Thirty (30) days prior to startup of the primary HVAC equipment, the CA meets with the contractors to develop a detailed commissioning schedule.

c. Regular Commissioning Meetings: In preparation for the start of commissioning, as well as during commissioning, meetings will be held regularly (per the contract documents) so that all parties are aware of the commissioning status and any issue can be addressed in a timely manner.

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d. Miscellaneous Meetings: The CA attends selected planning and job-site progress meetings in order to remain informed on construction progress and to update parties involved in commissioning.

.2 Initial Submittals and Documentation

a. Standard Submittals: The CA reviews approved submissions relative to commissioning issues expressed in the contract documents, not for general contract compliance (which is the A/E’s responsibility).

b. Contractor Requests for Information (RFIs): The CA reviews the A/E’s responses to RFIs for adherence to the OPR. Any necessary changes are incorporated into the Pre-functional Verification Checklists and Functional Performance Tests.

c. The BE CA will perform on-site construction observation and documentation, including periodic observation of the work in-progress.

.3 Pre-functional Verification Checklists, Tests, and Startup:

a. Pre-functional Verification Checklists, developed by the CA, are important to ensure that the equipment and systems are hooked up and operational and that functional performance testing may proceed without unnecessary delays.

Each piece of commissioned equipment receives a system verification checkout. The system verification testing for a given system must be successfully completed prior to formal functional performance testing of equipment or subsystems of the given system

b. Start-up Plan: The CA assists the commissioning team members responsible for start-up in developing detailed start-up plans for all equipment, to include safety requirements and considerations.

3. Acceptance Phase

.1 Execution of Functional Testing Procedures

a. Overview and Process: The CA provides functional tests. The procedures are executed by the Subs, under the direction of, and documented by, the CA.

b. Deficiencies and Retesting: The CA documents the results of the test.

Corrections of minor deficiencies identified are made during the tests at the discretion of the CA. The CA records the results of the test on the procedure or test form. Concern or non-conformance issues are noted and reported to the GC/CM. Contractor shall correct non-conformance issues and notify the CA.

The GC schedules retesting through the CA. Decisions regarding non-conformance and corrections are made at as low a level as possible, preferably between CA or GC and the contractors. For areas in dispute, final authority resides with the Owner, typically with consultation from the A/E. The CA gives final approval on each test.

c. Facility Staff Participation: The Owner’s facilities operating staff are encouraged to attend and participate in the testing process.

.2 O&M Manuals and Warranties

a. Construction Phase Prior to substantial completion, the CA will review the O&M manuals for systems that were commissioned. The CA will communicate deficiencies in the manuals to the GC/CM or A/E, as requested. The CA also

Summer Consultants, Inc. 4-3 reviews each equipment warranty and verifies that all requirements to keep the warranty valid are clearly stated.

.3 Training and Orientation of Owner Personnel

a. For each piece of equipment or system for which training is provided, the contractor provides an outline describing the subjects covered, duration of each subject, and the methods that will be used in the training, along with the name and qualifications of the trainer(s). The Owner and CA review the agenda; make comments; approve the form subject to the comments; and submit back to the contractor.

.4 Warranty Period

a. During the warranty period, seasonal testing and other deferred testing required are completed according to the Specifications. The CA coordinates this activity. Tests are executed, and deficiencies corrected by the appropriate contractors, witnessed by facilities staff and the CA. Any final adjustments to the O&M manuals and as-builts due to the testing are made.

b. If included in the contract, the CA will return to the project approximately 10 months into the 12-month warranty period. The purpose of this review is to verify with the facility staff satisfactory system operation prior to the warranty expiration. During this visit the CA will review with facility staff the current building operation and the condition of outstanding issues related to the original and seasonal commissioning. The CA will make suggestions for improvements and for recording these changes in the O&M manuals.

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Appendix A

DESIGN REVIEW

Project National Agricultural Library Cooling Tower Replacement Project No. 212.007

10301 Baltimore Ave #115

Beltsville, MD 20705

[xx% Commissioning Review] F:\mech\comm\dsn rvw

Item # Source Reference Comment Date Reviewer Response Date By Status

1 Drawings

[14] M-701 CONTROLS

Since these points are existing pneumatic actuators, has it been verified that they provide position feedback? 6/18/2024 OQasmieh Confirmed.

6/18/2024 LB Closed

2 Drawings [11] M-403 DETAILS Will there be sufficient reach to access this valve actuator from the tower walkway? 6/18/2024 OQasmieh Valve rotated for better access. 45461.509 LB Closed

3 Drawings [14] M-701 CONTROLS

Is CH-1, CWP-1, CHP-1 altogether rotating with CH-2, CWP-2, and

CHP-2? Or is it individual pieces of equipment that are rotating?

Could this be rephrased for clarity? 6/18/2024

OQasmieh Language updated 45461.428 LB Closed

4 Drawings [14] M-701 CONTROLS Is the pump VFD modulating to maintain 1000 GPM? If so, which flow meter is being used for reference? 6/18/2024 OQasmieh

The VFD will be balanced to maintain the flow. A note add to coordinate with TAB contractor on drawing M-701.

45461.429 LB Closed

5 Drawings [14] M-701 CONTROLS

How are the tower VFDs controlling to maintain CWT between the high and low limits? Once the condenser water temp falls below the low limit, is the VFD now modulating speed from 70% to whatever is required to maintain 60 degrees? Or is it lowering a fixed amount per a defined time period until the temperature has risen to 60 degrees? The same applies for when the CWT exceeds the high limit. 6/18/2024

OQasmieh The controls not time base. The sequence as written wil cover the high and low limits of operation. No change required to sequence.

45461.456 LB Closed

7 Drawings [14] M-701 CONTROLS What is considered chilled water demand? AHU chilled water valve position? 6/18/2024 OQasmieh AHU chilled water valve positions. 45461.464 LB Closed

8 Drawings [14] M-701 CONTROLS Is the "lead cell" the lead cooling tower?

6/18/2024

OQasmieh Correct, lead cell is the lead cooling tower. We have updated language updated to clarify lead equipment.

45461.466 LB Closed

9 Drawings [14] M-701 CONTROLS The vibration switch BI is not shown in the points list. 6/18/2024 OQasmieh Added to list. 45461.481 LB Closed

12 Drawings [14] M-701 CONTROLS What is the minimum speed that the tower VFD can modulate down to? 6/18/2024 Coordinated with manufacturer. 45461.504 LB Closed