0802_A_AUXILIARY_PRESTAGE_AREA_REFRIGERATION_INSTALLATION_(T-ALT_485)_Rev_10-3-18.doc

USNS WILLIAM MCLEAN

( TAKE 12 )

1.0 ABSTRACT

This item describes the installation of a Low Load Cargo Refrigeration system in the Pre Staging areas.

2.0 REFERENCES

2.1 MSC Drawing No. 201-8497934, T-AKE 1 CLASS AUX PRE- STAGE AREA REFRIG MCHRY ARR

2.2 MSC Drawing No. 113-8497935, T-AKE 1 CLASS AUX PRE- STAGE AREA REFRIGERATION FOUNDATIONS

2.3 MSC Drawing No. 514-8497936, T-AKE 1 CLASS AUX PRE-STAGE AREA CW PPG MODS INCID APAR REFRIGERATION SYS

2.4 MSC Drawing No. 516-8497937, T-AKE 1 CLASS AUX PRE-STAGE AREA REFRIGERATION REFRIG PPG

2.5 MSC Drawing No. 512-8497940, T-AKE 1 CLASS HVAC MODS INCID APAR REFRIG SYS

2.6 MSC Drawing No. 320-8497938, T-AKE 1 CLASS AUX PRE-STAGE AREA REFRIGERATION ELEC PWR

2.7 MSC Drawing No. 415-8497939, T-AKE 1 CLASS AUX PRE-STAGE AREA REFRIGERATION SYSTEM ETHERNET

2.8 MSC Drawing No. 7081122 COMSC Instruction 4700.16, General Technical Requirements

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity

3.1.1 Various, see reference 2.1

3.1.2 Quantity: None

3.2 Contractor Furnished Materials (CFM):

3.2.1 References 2.1-2.7 Bill of Materials

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES:

4.1 Government Furnished Equipment (GFE):

4.2 Government Furnished Services (GFS): None

4.3 Government Furnished Information (GFI): None

5.0 NOTES

5.1 The contractor and all subcontractors, regardless of tier, must consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTRs using Reference 2.8 as guidance.

5.2 The contractor and all subcontractors regardless of tier are advised to review the other work items under this contract to determine their effect on the work required under this work item.

5.3 THIS SHIP CONTAINS HIGH VOLTAGE (HV) ELECTRICAL SYSTEMS. OBEY ALL POSTED AND VERBAL INSTRUCTIONS REGARDING SAFETY AND EXCLUSION FROM HIGH VOLTAGE AREAS. AT NO TIME APPROACH, WORK ON, OR ENTER A HIGH VOLTAGE AREA WITHOUT PROPER AUTHORIZATION.

T-AKE CLASS ELECTRICAL COLOR CODING DOES NOT FOLLOW CONSISTENT COLOR SCHEME. THE SHIP IS KNOWN TO HAVE CURRENT CARRYING CONDUCTORS COLORED GREEN, BLUE, BLACK, AND WHITE. ASSUME ALL ELECTRICAL CABLES ARE ENERGIZED UNTIL TESTED AND PROVEN OTHERWISE. TEST ALL ELECTRICAL CABLES TO ENSURE THEY ARE DE-ENERGIZED PRIOR TO WORKING ON THE ITEM.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional

7.0 STATEMENT OF WORK

7.1 Arrangements/Outfitting: None Additional

7.2 Structural

7.2.1 Modifications:

7.2.1.1 Modify all stainless steel sheathing on bulkheads and overheads for removals and installs of new foundations in pre-stage boxes.

7.2.2 Installations:

7.2.2.1 Fabricate and install foundations for Condensing Units, Unit Coolers, Control Panels, Frequency Converters, Gas Sensors and Thermostats using GTR 25 and References 2.1 and 2.2 as guidance.

7.2.2.2 Fabricate and install two vent fan foundations using GTR 25 and Reference 2.5 as guidance.

7.3 Mechanical/Fluids

7.3.1 Removals:

7.3.1.1 Drain and dispose all chill water as required for equipment and piping removals.

7.3.1.2 Remove and Chill Water Supply and Return piping, valves and fittings as shown on Plans 20-A and 20-D of Ref. 2.3, using GTR 3,22,23 and 27 and Reference 2.3 as guidance.

7.3.2 Modifications:

7.3.2.1 Modify HVAC Vent ducting using GTR’s 3, 22, 23 and 27 and Reference 2.5 as guidance

7.3.3 Installations:

7.3.3.1 Install new Chill Water Supply and Return piping, valves, fittings, and flex connectors using GTR 3,22 Section 7.0, 23 and Reference 2.3 as guidance.

7.3.3.2 Install new Refrigerant Piping using GTR 3, 22 Section 7.0, 23 and Reference 2.4 as guidance.

7.4 Electrical

7.4.1 Installations:

7.4.1.1 Install the electrical systems and equipment using GTR 28 and References 2.1 and 2.6 as guidance.

7.4.1.2 Restore all existing and new cable penetrations with ABS/USCG approved material.

7.5 Electronics

7.5.1 Installations:

7.5.1.1 Install the Ethernet Connection using GTR 28 and Reference 2.7 as guidance.

7.6 Preparation of Drawings: None additional

7.7 Inspection/Test

7.7.1 Tests

7.7.1.1 Leak test new refrigerant piping using GTR No.3, subparagraph 6.0 and Reference 2.4 as guidance.

7.7.1.2 Perform air and water hose tests of new deck and bulkhead penetrations using GTR No.3, subparagraphs 8.1.1, 8.1.2 and References 2.3 and 2.4 as guidance.

7.7.1.3 Perform Insulation Resistance Tests using GTR No.3, subparagraph 10.2 and Reference 2.6 as guidance.

7.7.1.4 Perform an operational test on each new power circuit using GTR No.3 subparagraph 10.6 and Reference 2.6 as guidance.

7.7.1.5 Perform a test of new Condensing Unit Motors, Fan Motors and Unit Cooler motors and local and remote power and alarm sensing circuits using GTR No.3, subparagraph 10.7 and Reference 2.6 as guidance.

7.7.1.6 Perform volumetric testing of two new vent fans using GTR No.3, subparagraph 12.2.2. of section c. and References 2.5 and 2.6 as guidance.

7.7.1.7 Accomplish a hot water flush of brazed chill water piping to remove flux material prior to hydrostatic tests. Prepare and execute a flushing procedure using NSTM Chapter 505, sub paragraph 505-7.7.4 and 0900-LP-001-7000, Fabrication and Inspection of Brazed Piping Systems, for guidance

7.7.1.8 Perform a hydrostatic test at 150% of working pressure using clean, fresh water of the newly installed Chill Water System piping and valves to and from the Condensing Units using GTR No.3 and Reference 2.3 as guidance.

7.8 Painting / Insulation

7.8.1 Insulate all piping IAW MSC GTR, Ref 2.8

7.8.2 Paint all new and modified surfaces to match surrounding surfaces.

7.9 Marking

7.9.1 Install name plates, label plates, flow arrows, notices and markings for all new and modified systems and equipment. Use label plate lists on References 2.3, 2.5, and 2.6 as guidance.

7.10 Manufacturer’s Representative:

7.10.1 Furnish the services of a Johnson Controls OEM to provide oversight of all installations, testing, and commissioning;

James Snider

Operations Manager

Johnson Controls Global Marine & Navy

15901 SW 29th Street

Suite 801

Miramar | FL |33027

Direct: 954.707.3454

E-mail: james.snider@jci.com

8.0 GENERAL REQUIREMENTS: None additional

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