Addendum One.pdf

COMMONWEALTH OF KENTUCKY

DEPARTMENT FOR FACILITIES AND SUPPORT SERVICES

DIVISION OF ENGINEERING AND CONTRACT ADMINISTRATION

INVITATION TO BID NO: RFB-47-24

FOR: Emergency HVAC McCracken Regional Juvenile Detention Center Department of Juvenile Justice McCracken County, Kentucky

DATE: September 1, 2023

RFB-785-2400000075

ADDENDUM NO. One (1)

BIDDER SHALL CONFORM TO THE FOLLOWING CHANGES AS SAME SHALL BECOME BINDING

UPON THE CONTRACT TO BE ISSUED IN RESPONSE TO THIS INVITATION TO BID.

Item 1: Refer to addendum to be distributed by Lynn Imaging for all additions, deletions, and/or changes to specifications and/or drawings.

END OF ADDENDUM

Invitation to Bid No. RFB-47-24 For: Emergency HVAC McCracken Regional Juvenile Detention Center Department of Juvenile Justice McCracken County, Kentucky

Susan Ward, Statewide Procurement Analyst II Division of Engineering and Contract Administration

MCCRACKEN EMERGENCY HVAC

DEPARTMENT OF JUVENILE JUSTICE

PADUCAH, KENTUCKY

ACCOUNT NO. 523-CB1M-MK08-00

MARCUM NO. 23580

ADDENDUM 1.00

AUGUST 31, 2023

The following Addendum Items shall be made part of the Contract Documents for the referenced project.

1.01 Refer to Section 10000 Special Conditions, Section 4. The Contractor shall have the option to complete demolition of existing chiller and portions of new piping installation prior to the new chiller arriving for a Phased approach to Construction. The Contractor shall coordinate any and all outages in cooling from the temporary chiller with the Owner and approvals of outages shall be in writing. Work that can be completed include but are not limited to: Installation of new piping, valves, insulation, wall penetrations, control valves, etc; demolition and capping of existing piping; demolition of existing chiller.

1.02 Refer to Section 232113 Hydronic Piping. The Owner’s current Chemical Treatment Contractor is Bluegrass Kesco. The Contractor is not required to utilize this Contractor but shall comply with the requirements of the Contract Documents. The existing conditions of the treatment system results are attached. The Contractor shall furnish chemicals and anti-freeze solution as specified. Reuse of existing glycol and/or equipment is not acceptable.

1.03 Refer to Drawing ME0.1 Air Cooled Scroll Chiller Schedule and Section

236423.13 Update the Manufacturers List to include “JCI”. Final approval will be reserved for the Shop Drawing review stage.

1.04 Refer to Drawing ME0.1 Air Cooled Scroll Chiller Schedule – Note 30. The unit shall be furnished with heat trace factory installed with insulation on the evaporator side of the chiller. Omit requirements for installation of heat tracing on buffer tank, pumps, and piping. Chiller controls shall be setup for freeze protection cycling of pumps.

1.05 Refer to Drawing ME1.1. Contractor shall removed existing chilled water fill line system including shutoff valves, bypass piping, and Pressure Reducing Valve.

Contractor shall connect new fill line system to outlet of existing backflow preventer with 1” water line. Install fill station per attached detail on Sketch XME1. Rout fill line and connect to system at air-dirt separator per Expansion Tank Piping Diagram.

1.06 Refer to Drawing ME1.1 – Mechanical Construction Tag Note 12. Route expansion tank piping and connect to top of air-dirt separator.

1.07 Refer to Drawing ME1.1. Existing Temporary Chiller connections for piping and power shall be removed by the Temporary Chiller supplier.

1.08 Refer to Drawing ME1.1 – Mechanical Demolition Tag Notes 7 and 12.

Contractor shall plug piping with T-Cone cleanout plug with black plastic cap.

1.09 Refer to Drawing ME1.1 and Section 232113. The Contractor shall assume the existing chilled water coil holds 300 gallons of water within the coil. The remainder of the system water volume shall be calculated by the Contractor to obtain 40% Propylene Glycol.

Attachments:

1. Sketch XME1

2. Existing System Chemical Treatment Report

END OF ADDENDUM 1.00

COPYRIGHT ©, 2023 - MARCUM ENGINEERING, LLC

500 SOUTH 17th STREET

PADUCAH, KENTUCKY 42002-0120

PHONE - 270.444.9274 FAX - 270.443.1904

FILL LINE DIAGRAM

MCCRACKEN EMERGENCY HVAC

MCCRACKEN REGIONAL JUV. DETENTION CENTER

PADUCAH, KY

PROJECT NO.

DATE:

DRAWN BY:

SCALE:

REFERENCE DRAWING

SKETCH NO.

23580

08/31/2023

ME4.1

BCA

NONE

XME1

REDUCING VALVE,

B&G MODEL B7-12 OR

TO WATER FILL

SET AT 12 PSI

APPROVED EQUAL -

CONNECT TO EXISTING

BACKFLOW PREVENTER

FILL LINE DIAGRAM

NO SCALE

ISOLATION VALVE

(TYP.)

STRAINER

UNION (TYP.)

PRESS. GA.

(TYP.)

Test Hot Closed Loop Chilled Closed Loop

Conductivity (µS/cm) 3034 1000 - 4000

1000 - 4000

Sodium Nitrite as NaNO2 (ppm) 1000 1000 - 1500

1000 - 1500 pH 9.9 9 - 10.5

9.9 9 - 10.5

Water Clarity (Clear; Tinted;

Fouled)

Clear

Clear

Inventory Comments

OAT: 79F

RH: 80%

Cloudy

Opening Comment Worked with David. Thank you, Sir.

Hot Closed Loop Online This system is currently well treated for active corrosion control and is stable.

System water is clear.

Chilled Closed Loop Online This system now has a rental chiller on a trailer. This has caused a loss of treated system water and a drop in chemical residual.

Sodium Nitrite Control Limits is 800-1500 ppm (not low end of 1000 ppm).

So, this system is still well treated for active corrosion control and is within control limits.

No treatment feed is needed now.

Piping and equipment changes in the near future will likely impact this system and require more KL 609S chemical feed. David will inform me.

Closing Comment Thank you.

Service Report Second Quarter Service Visit

Tuesday, June 20, 2023 12:00 PM EDT

McCracken County Juvenile Detention Center McCracken Co. Juvenile Detention Center 501 County Park Road Paducah KY 42001

(270) 575-7111

Report Number: 317949 Recorded By: Andy Kruck-CWT#00056

(615) 339-4687 Andy@BluegrassKesco.com

Mechanical Room - Systems

Bluegrass Kesco, Inc - 1101 Industrial Blvd, Louisville KY 40219 (502) 969-4499

Second Quarter Service Visit 6-20-2023