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1. ITEM 1: Vaneaxial Fan and Motor assembly, Overhaul

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to complete overhaul vaneaxial fan and motor assembly listed in Table 1 on the cutter.

TABLE 1 – vaneaxail fanS

SYSTEM / FAN NUMBER

model number

LOCATION

dimension / APPROX. WEIGHTS

coast guard DRAWING

SS-51 / 1-15-2

XA7A4W5

Line Handling Space and Windlass Machinery Room / (1-9-0-Q)

32 Inches X 19.5 Dia / 550 Lbs.

750-WSML-512-019

SS-55 / 1-49-1

XA2A4W5

Incinerator room /

(1-47-1-Q)

26 Inches X 15.5 Dia / 220 Lbs.

750-WSML-512-030

SS-58 / 02-64-1

XA2-1/2A4W5

VUAV Spare Storeroom Area / (01-52-0-Q)

24 Inches X 15.5 Dia / 215 Lbs.

750-WSML-512-050

SS-59 / 02-64-2

XA2-1/2A4W5

VUAV Spare Storeroom Area / (01-52-0-Q)

24 Inches X 15.5 Dia / 215 Lbs.

750-WSML-512-050

SS-69 / 2-46-1

XA1-1/2A4W5

Upper Level Fan Room /

(2-44-3-Q)

20 Inches X 14.25 Inch Dia / 192 Lbs.

750-WSML-512-013

ES-105 / 1-46-1

XA2A4W5

Trash Stowage Holding

and Staging Room /

(1-44-1-Q)

26 Inches X 15.5 Dia / 220 Lbs.

750-WSML-512-030

ES-116 / 1-45-1

XA1A4W5

Trash Stowage Holding and Staging Room /

(1-44-1-Q)

19.38 Inches X 12.75 Dia / 145 Lbs.

750-WSML-512-030

ES-119 / 1-53-1

XA2-1/2A4W5

Scullery / (1-52-1-Q)

24 Inches X 15.5 Dia / 215 Lbs.

750-WSML-512-034

1.2 Government-furnished property.

MTI

ITEM DESCRIPTION

NSN/PN

QTY

ESTIMATED COST ($/UNIT)

Y

Fan Vaneaxial, 7.5 HP, 3600/1800 RPM, 440 Volt / 3 Phase 60 Hz

016035149 /

XA7A4W5

1 ea.

24030.00

Y

Fan Vaneaxial, 1.5 HP, 3600 RPM, 440 Volt / 3 Phase 60 Hz

012954283 /

XA2A4W5

1 ea.

11894.50

Y

Fan Vaneaxial, 2 HP, 3600 RPM, 440/3 Phase 60 Hz

015619655 /

XA2-1/2A4W5

3 ea.

10732.52

Y

Fan Vaneaxial, 1.25 HP, 3600 RPM, 440/3 Phase 60 Hz

016035326 /

XA1-1/2A4W5

1 ea.

11430.68

Y

Fan Vaneaxial, 1.5 HP, 3600 RPM, 440/3 Phase 60 Hz

012954283 /

XA2A4W5

1 ea.

11894.50

Y

Fan Vaneaxial, 1.0 HP, 3600 RPM, 440/3 Phase 60 Hz

015619700 /

XA1A4W5

1 ea.

11876.86

2. REFERENCES

Coast Guard Drawings

Coast Guard Drawing 418A-WMSL-100-001, Rev B, General Arrangements

Coast Guard Drawing 418A-WMSL-801-001, Rev A, Booklet of General Plans

Coast Guard Drawing 750-WMSL-180-006, Rev C, FDN ARR DWG Design Unit 1240 BKLT NO. 1 (ASC180124) (UNSIGNED)

Coast Guard Drawing 750-WMSL-180-019, Rev C, FDN ARR DWG Design Unit 2230 BKLT NO. 1 (ASC180223) (UNSIGNED)

Coast Guard Drawing 750-WMSL-180-020, Rev D, FDN ARR DWG Design Unit 2240 BKLT NO. 1 (ASC180224) (UNSIGNED)

Coast Guard Drawing 750-WMSL-180-023, Rev G, FDN ARR DWG Design Unit 2320 BKLT NO. 1 (ASC180232) (UNSIGNED)

Coast Guard Drawing 750-WMSL-180-043, Rev G, FDN ARR DWG Design Unit 4420 BKLT NO. 1 (ASC180442) (UNSIGNED)

Coast Guard Drawing 750-WMSL-512-001, Rev E, HVAC System Diagram

Coast Guard Drawing 750-WMSL-512-004, Rev A, Vent and Air Conditioning Standard Instruction (ASC512007)

Coast Guard Drawing 750-WMSL-512-013, Rev A, Vent & Air Cond Arr Mn Dk Unit 2230 (ASC512016) (UNSIGNED)

Coast Guard Drawing 750-WMSL-512-019, Rev C, Vent & Air Cond Arr Mn Dk Unit 1240 (ASC512124) (UNSIGNED)

Coast Guard Drawing 750-WMSL-512-030, Rev B, Vent & Air Cond Arr Mn Dk Unit 2240 (ASC512224) (UNSIGNED)

Coast Guard Drawing 750-WMSL-512-034, Rev B, Vent & Air Cond Arr Mn Dk Unit 2340 (ASC512234) (UNSIGNED)

Coast Guard Drawing 750-WMSL-512-050, Rev D, Vent & Air Cond Arr Mn Dk Unit 4420 (ASC512442) (UNSIGNED)

Coast Guard Drawing 750-WMSL-512-059, Rev A, HVAC Equipment List (ASC512004)

Coast Guard Publications

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2020, General Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2020, Welding and Allied Processes

Surface Forces Logistics Center Standard Specification 3020 (SFLC Std Spec 3020), 2020, Overhaul Electric Motors

Surface Forces Logistics Center Standard Specification 3101 (SFLC Std Spec 3101), 2020, Overhaul AC Synchronous Machines

Surface Forces Logistics Center Standard Specification 3041 (SFLC Std Spec 3041), 2020, Shipboard Electrical Cable Test

Surface Forces Logistics Center Standard Specification 3042 (SFLC Std Spec 3042), 2020, Shipboard Electrical Cable Removal, Relocation, Splice, Repair, and Installation

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2020, Requirements for Preservation of Ship Structures

Coast Guard Technical Publication (TP) 7148, 24-AUG-07, Standard XA Vaneaxail Fan

Other References

Code of Federal Regulations (CFR) Title 29, Part 1915, Subpart E, Sep 2015, Scaffolds, Ladders and Other Working Surfaces

International Standard Organization (ISO) 2953, 1999, Mechanical Vibration, Balancing Machines, Description and Evaluation

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep.

Not Applicable

3.1.3 Protective measures. The Contractor must furnish and install all protective measures in accordance with SFLC Std Spec 0000, paragraph 3.3.3 (Vessel component, space, and equipment protection).

3.1.4 Interferences. The Contractor must handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences). Known interferences include, but are not limited to the following:

• Electrical wiring


• Piping


• Ventilation Duct Work


• Overhead Lights


• Van Axial Fan Assembly Foundation

3.1.5 Electrical requirements. The Contractor must accomplish all electrical work in accordance with SFLC Std Spec 3042, and test cables in accordance with SFLC Std Spec 3041.

3.1.6 Work locations. The concerned work area is listed in Table 1. See Coast Guard Drawings and Tech Pub in Section 2 above for guidance, locations, and details.

3.1.7 Scaffolding. The Contractor shall, in accordance with CFR Title 29, Part 1915, Subpart E, erect suitable staging or scaffolding, as required, to facilitate work. The Contractor must provide hoists to remove and re-install the vaneaxial fan assembly in Table 1.

3.1.8 Rigging. The Contractor is responsible for rigging of all and necessary tools, materials, including GFP form and to the pier as well as from and to work compartment. When necessary, the Contractor must provide crane service to move materials, tools and GFE to and from pier, deck and work compartment.

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.1.9 Operational test, initial. Prior to commencement of work, the Contractor must witness Coast Guard personnel perform an initial operational test of all items or shipboard devices to be disturbed, used, repaired, or altered, to demonstrate existing operational condition. Submit a CFR.

3.1.10 The Contractor must supply and install parts for overhauling vaneaxial fan assembly in accordance with TP 7148.

3.1.10.1 For overhauling needed parts, the Contactor must contact:

• Chuck Neal


• Applications Engineer – Navy & Marine Product


• Howden Americas Fans


• Office: (330) 308-7046


• Mobile: (330) 243-6061


• E-mail: chuck.neal@howden.com 0

3.2 Vaneaxial fan assembly overhaul. The Contractor must remove, overhaul, balance and test vaneaxial fan listed in the Table 1 in accordance with TP 7148. Vaneaxial fan installation is shown on following Coast Guard Drawings:

• Coast Guard Drawing 750-WMSLl-512-013


• Coast Guard Drawing 750-WMSL-512-019


• Coast Guard Drawing 750-WMSL-512-030


• Coast Guard Drawing 750-WMSL-512-034


• Coast Guard Drawing 750-WMSL-512-050

3.2.1 The Contractor must disconnect electric cables to vaneaxail fan assembly in accordance with the SFLC Std Spec 3042. Pull back cables and temporarily insulate cable ends for safety. Record wiring information for later re-connection and submit a CFR.

3.2.2 The Contractor must remove vaneaxial fan assembly from ventilation duct for overhaul in accordance with Tech Pub 7148. The Contractor must temporary support ventilation duct on each side of removed vaneaxial fan assembly. The Contractor must inspect vibration mount of vaneaxial fan assembly and submit a CFR.

3.2.3 The Contractor must vacuum clean each side of ventilation duct work to a distance of three feet on either side of the vaneaxial fan assembly installation.

3.2.4 Cleaning. The Contractor must clean the interior and exterior vaneaxial fan assembly surfaces, including housing, fan blade, and end bell surfaces by first using suction, then with a soapy water solution, and followed by a thorough rinsing of all metal surfaces in accordance with TP 7148. Ensure that there are no cleaning fluid residues or injurious effects on cleaned surfaces.

3.2.5 After cleaning, the Contractor must visually inspect the vaneaxial fan assembly including bearing surfaces for cracks, areas of distortion, and deterioration. Submit a CFR.

3.2.6 The Contactor must perform major component repair on vane axial fan assembly listed in Table 1 in accordance with Para 6.5 of TP 7148.

3.2 7 Electric motor overhaul. The Contractor shall disassemble each ventilation fan motor from its fan. During disassembly, ensure that each fan motor is properly marked to indicate the fan it was removed from. Perform insulation resistance on each electric motor in accordance with SFLC Std Spec 3020. Reassemble with new sealed bearings. Submit a CFR. Rewind shall not be part of the overhaul process unless test results by the Contractor support rewind and is approved by the Contracting Officers Technical Representative (COTR).

3.2.7.1 The Contractor must clean, inspect and test the motor in accordance with SFLC Std Spec 3020.

3.2.7.2 Fan, vaneaxial and motor assembly restoration. The Contractor must reassemble each fan and motor assembly; couple the fan to the motor assembly using new stainless steel in accordance with TP 7148.

3.2.7.3 The Contractor must perform motor alignment with fan blade in accordance with TP 7148. Submit a CFR.

3.2.7.4 Dynamic balancing and documentation. The Contractor must dynamically balance the rotating elements along with associated equipment as a unit, (Fan blade and motor installed and in casing), in accordance with TP 7148 and ISO 2953. Submit a CFR written balance report.

3.2.8 Coatings. Prepare and coat the fan casing surfaces in using the system specified for “Machinery, Operating Temperatures Under 200 Degree F, Unmachined Surfaces” in SFLC Std Spec 6310, Appendix B (Cutter and Boat Interior Paint Systems). Select finish/top coat color to match existing adjacent surfaces.

3.2.9 The Contractor must fabricate new flexible duct assembly in accordance with Coast Guard Drawing 750-WMSL-512-004.

3.2.10 The Contractor must re-mount vaneaxial fan assembly to its foundation in original operating condition in accordance with Coast Guard Drawings reference Para 2 and TP 7148.

3.2.11 The Contractor must reinstall vaneaxial fan assembly with new Contractor-furnished rubber vibration dampers, gaskets and/or resilient mounts and fasteners as applicable in the ducting. Restore all ventilation ductwork to original configuration as shown on Coast Guard Drawing reference Para 2.

3.2.12 The Contractor must re-connect cables to electric motor with previously recorded information in accordance with SFLC std Spec 3042.

3.2.13 The Contractor must test cables in accordance with SFLC Std Spec 3041 and submit CFR.

3.3 Verification. Prior to re-energization, a final closeout inspection must be performed in the presence of the Coast Guard Inspector. The contractor must submit a signed completed copy of the inspection checklist to the Coast Guard Inspector for affected by the work. The checklist must contain, at a minimum, the following attributes:

• Verification that each disturbed electrical connection is tight and properly terminated.


• Certification that no foreign material was found in the panel sections affected by the work.


• Certification that all rerouted wiring is properly labeled and that all new/rerouted cables are properly marked.


• Perform a phase rotation test on each disturbed circuit. Correct any improperly phased wiring and repeat the test.


• No loose hardware and Nothing lose in the duct work


• Before energization, Impeller rotates freely


• Submit a CFR.

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.4 Operational test – post repairs. After completion of work, the Contractor must thoroughly test, in the presence of the Coast Guard Inspector and demonstrate all items or shipboard devices that have been disturbed, used, repaired, altered, or installed to be in satisfactory operating condition. Submit a CFR.

3.4.1 Verify the motor runs quietly for an hour and without excessive vibration.

3.4.2 Verify direction of air flow.

3.5 Touch-up preservation. The Contractor must prepare and coat all new and disturbed surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310, paragraph 3.1.13 (Touch-ups and minor coating repairs).

4. NOTES

This section is not applicable to this work item.

Attachments/Links