UNIVERSITY OF CALIFORNIA, SAN DIEGO

Transcription

1 BERKELEY DAVIS IRVINE LOS ANGELES MERCED RIVERSIDE SAN DIEGO SAN FRANCISCO SANT A BARBARA SANT A CRUZ OFFICE OF THE ASSIST ANT VICE CHANCELLOR CAMPUS ARCHITECT- FACILITIES DESIGN & CONSTRUCTION TEL: (858) FAX: (858) GILMAN DRIVE#916 LA JOLLA, CALIFORNIA October 3, 2016 TO: ALL HOLDERS OF BIDDING DOCUMENTS EAST CAMPUS PLANT- 4TH CHILLER INSTALLATION PROJECT NO.: 5017/A4L-420/ Enclosed are the following: 1. Addendum No. 2 dated October 3, 2016, to the Construction Documents. 2. Revised Section 15080, Page 19 dated October 3, Revised drawing sheets: C-100, C-101, M-101, and M-611 dated October 3, Sheets Narrative dated October 3, Clarifications dated October 3, L--c~~'R'". Oillie Senior Director of Construction Services Facilities Design and Construction Enclosures

2 EAST CAMPUS PLANT - 4TH CHILLER INSTALLATION General: ADDENDUM NO. TWO TO THE CONSTRUCTION DOCUMENTS October 3, 2016 The following changes, additions, or deletions shall be made to the following documents; all other conditions shall remain the same. I. SPECIFICATIONS Item# 1. SECTION 01810, COMMISSIONING A. Page 6, Paragraph 3.3, Field Start-Up and Testing Add Paragraph 3.3, C.13 as follows: 13. Thermal Energy Storage TES-2 Tank 2. SECTION 15080, MECHANICAL INSULATION Delete Section 15080, Page 19 and substitute the enclosed revised Section 15080, Page 19 dated 10/03/ SECTION 15181, HYDRONIC PIPING A. Page 3, Paragraph 2.1, Manufacturers Add Paragraph 2.1, A.4 as follows: 4. Seismic L Shaped Connectors: a. Hyspan, Inc. b. Metraflex, Inc. c. Unisource Manufacturing, Inc. d. Or equal. B. Page 6, Paragraph 2.7, Hydronic Specialties Add Paragraph 2.7, F as follows: F. Seismic L Shaped Connectors: Type 321 stainless-steel hose with type 304 stainless steel braid, carbon steel elbow; 150-psig minimum working pressure and 250 deg F maximum operating temperature. Connectors shall have flanged-end connections to match equipment connected and shall be capable of 2" of movement. UCSD - FD&C Page 1 of 3

3 EAST CAMPUS PLANT - 4TH CHILLER INSTALLATION 4. SECTION 15625, CENTRIFUGAL WATER CHILLERS A. Page 8, Paragraph 2.10 Source Quality Control Delete the following words from Paragraph 2.10, G: The chiller shall be started with 65 degree F entering condenser water to simulate start up at off peak conditions. The test shall be performed in accordance with ARI 550/ SECTION 15900, HVAC INSTRUMENTATION AND CONTROLS A. Page 12, Paragraph 2.12, Metal Conduit and Tubing Add Paragraph 2.12, D as follows: D. TES temperature sensors JIC Lift-Off Cover Enclosures 1. Type 4X, UL Listed, 304 stainless steel, 16 gauge enclosure and cover, fixed oil and water resistant gasket. 2. External mounting feet. 3. Manufacturers: a. Cooper B-Line, Inc. b. Wiegmann, a division of Hubbell Inc. c. Or equal 6. SECTION 17200, TESTING, ADJUSTING, AND BALANCING A. Page 2, Paragraph 1.2, Description of Work Add Paragraph 1.2, G as follows: G. Thermal Energy Storage (TES) Tanks: 1. Excluded from this project scope of work is the filling and commissioning of TES-2 which shall validate tank operation. Filling and commissioning of TES-2 tank shall be performed by a third-party hired directly by the University under separate contract. 2. Contractor shall coordinate with the third-party commissioning TES-2 tank in the execution of their work if Bid Alternate #1 is selected for installation by the University. 3. Contractor shall validate proper operation of the TES Controls & Instrumentation associated with Bid Alternate #1 if selected for installation by the University. UCSD - FD&C Page 2 of 3

4 EAST CAMPUS PLANT - 4TH CHILLER INSTALLATION II. Item# DRAWINGS 1. Delete the following listed sheets in their entirety and substitute with the attached revised sheets dated 10/03/2016. Revised Sheets: C-100, C-101, M-101, and M Sheets Narrative dated 10/03/2016. III. Item# CLARIFICATIONS 1. Contractor RFI s and University responses dated 10/03/2016. UCSD - FD&C Page 3 of 3

5 Version Reissued 11/01/2008 (with revisions)(revised 11/09) 3.14 OUTDOOR, ABOVEGROUND PIPING INSULATION SCHEDULE A. Chilled Water and Brine: 1. All Pipe Sizes: Insulation shall be the following: a. Mineral-Fiber Pipe Insulation, Type I: 3 inches thick INDOOR, FIELD-APPLIED JACKET SCHEDULE A. Install jacket over insulation material. For insulation with factory-applied jacket, install the field-applied jacket over the factory-applied jacket. B. If more than one material is listed, selection from materials listed is Contractor's option. C. Piping, Exposed: 1. PVC, Color-Coded by System: 30 mils thick. For use on piping 10 ft or more above finished floor. 2. Aluminum, Smooth0.024 inch thick. For use on piping up to 10 ft above finished floor OUTDOOR, FIELD-APPLIED JACKET SCHEDULE D. Install jacket over insulation material. For insulation with factory-applied jacket, install the field-applied jacket over the factory-applied jacket. E. If more than one material is listed, selection from materials listed is Contractor's option. F. Piping, Exposed: 1. Aluminum, Stucco Embossed: inch thick. END OF SECTION EC CENTRAL PLANT INSTALL 4TH CHILLER Mechanical Insulation Revised 10/03/16, Addendum 2

6 EAST CAMPUS PLANT - 4TH CHILLER INSTLLATION ADDENDUM NO. 2 SHEETS NARRATIVE (As of October 3, 2016) SHEET NARRATIVE C-100 Added Standard Drawings and Specifications notes to clarify most updated standards for the contractor to be using. C-101 Updated catch basin detail to have pipe penetrating through sidewall instead of bottom. M-101 Added photo of existing 12" CHWS&R connections to TES 1 for reference for contractor to pipe TES2 in similar way. Added points of connection photo of TES 2 piping. Added diagrammatic existing empty conduit quantity and location. M-611 Added 12"CHWS&R pipe connections and seismic L-loops to TES 2. 1 of 1

7 EAST CAMPUS PLANT - 4TH CHILLER INSTLLATION ADDENDUM NO. 2 QUESTIONS & ANSWERS (As of October 3, 2016) Q1: Sheet E-101 shows a duct bank being intercepted and re-routed between an existing 277/480V switchboard and an underground vault. Is the new vault new or existing? A1: The vault is existing and shall remain. Q2: Is the existing duct bank encased in concrete? A2: Record drawings indicate 4 C with slurry cap. Q3: Once intercepted and re-routed, there is direction to remove the existing duct bank for the installation of the new cooling towers, who will be doing this demolition work? A3: This project Contractor Q4: Sheet E-131 indicates MC2A-3 as the feeder for CHWP-5. The feeder schedule on sheet E-600 indicates MC2A-4 for CHWP-5, please clarify. A4: Feeder schedule on sheet E-600 is correct. Q5: Sheet E-131 indicates MC2A-2 as the feeder for CWP-5. The feeder schedule on sheet E-600 indicates MC2A-3 as the feeder for CWP-5, please clarify. A5: Feeder schedule on sheet E-600 is correct. Q6: LOAD SUMMARY MC-2 indicates CHW4 as a new load, however CHW-4 is not indicated on the single line for MC2, please clarify. A6: Correct designation for this 50HP load shall be CWP-5. 1 of 1