USNS MARY SEARS

(T-AGS-65)

HEATING, VENTILATION AND AIR CONDITIONING / Sol. NO. MLL-16-T65-0001
September 21, 2016
ITEM NO. / 0803 / CATEGORY / “A” / USMMI/SIMONSON/MS/RCS

CLEAN ALL HVAC DUCTING, AIR HANDLERS AND FAN ROOMS

1.0  ABSTRACT:

1.1  This item describes the requirements for the contractor to clean all ventilation ducting, air handlers and fan rooms.

2.0  REFERENCES/ENCLOSURES:

2.1  References:

2.1.1 Technical Manual T9512-EQ-MMC-010 Heating, Ventilation and Air Conditioning (HVAC) Units

2.2  Enclosures:

2.2.1 MSC Standard item #15, “Cleaning ventilation systems”

2.2.2 MSC standard item # 16, “Cleaning ventilation filter screens”

3.0  ITEM LOCATION/DESCRIPTION:

3.1  Location/Quantity:

3.1 Air Handler Locations

# / Location / Capacity
1 / 02-63-1 / 75 GPM
2 / 01-110-1 / 66 GPM
3 / 01-90-2 / 62 GPM
4 / 1-115-2 / 33 GPM
5 / 1-75-1 / 40 GPM
6 / 1-26-2 / 40 GPM
7 / 2-106-2 / 11 GPM
8 / 2-95-2 (C.C) / 40 GPM
9 / 2-70-2 / 32 GPM
10 / 2-37-1 / 28 GPM
11 / 3-82-2 / 28 GPM

3.2 Ventilation Fan and Motor Locations

Location / Service / Model # / HP / CFM / Remarks
Stack / Generator Rm / 54hb / 30 / 54540 / 2 speed
Stack / Generator Rm / 54hb / 30 / 54540 / 2 speed
Stack / Generator Rm / Ma48b9 / 50 / 57930 / 2 speed
Stack / Generator Rm / Ma48b9 / 50 / 50500 / 2 speed
02-61-1 fan Room / Forecastle deck & above / XA 1 ½ / 1.25 / 1715
01-111-6dc / DC timber storage / Ma5cf / 0.2 / 165
01-111-6 dc tim & p250 stow / Machinery control station / Ma100af / 5 / 9755 / 2 speed
Vent / Galley / Xa6 / 5 / 7110
01-111-6 dc tim & p250 stow / Paint locker / Ma2 ½ / 0.05 / 150 / Non-sparking
01-111-2 emergency gen / Emergency generator / Ma 12pf / 0.17 / 470
01-73-1 Fan room / Galley / Ma60af / 3 / 7110
Vent / Bow thruster / Ma60af / 3 / 6210 / 2 speed
1-54-3 Fan room / Main deck & below T&S / Xa6 / 5 / 6155
2-65-8 Fan room / Storerooms / Ma50cf / 3 / 4240
Vent / Wet lab / Xa ½ / 0.33 / 700
2-95-1 Repair parts Store Room / Shops / Ma60af / 3 / 5965 / 2 speed
2-104-0 High density Store Room / Aft pump Room / Xa 1 ½ / 1.25 / 1460 / 2 speed
2-120-0 Winch Room / Winch Room / Xa 3 / 3 / 3970 / 2 speed
2-120-0 Winch Room / Seismic sys cap bank Store Room / Xa ½ / 0.33 / 710 / 2 speed
2-136-0 Prop Motor Room / Prop Motor Room / Xa6 / 5 / 6290 / 2 speed
2-86-1 Repair parts Store Room / Shops / Xa6 / 5 / 8165 / 2 speed
3-73-0 Forward pump Room / Forward pump Room / Xa2 / 1.75 / 2395 / 2 speed

4.0  OPERATOR FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1  Operator Furnished Equipment (OFE): None

4.2  Operator Furnished Material (OFM): None

4.3  Operator Furnished Services (OFS): None

4.4  Operator Furnished Information (OFI): 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 including but not limited to GTRs 1-7, 22, 23, 28, and 29. GTRs can be obtained from the following URL: http://www.msc.navy.mil/instructions/pdf/m470016.pdf

5.2  The contractor and all subcontractors, regardless of tier are advised to review other work items under this contract to determine their effect on the work required under this work item. Many of the definitions relating to performance of this work item are found in Work Item 0001.

5.3  The contractor shall comply with all requirements of equipment tag-out program as established by COMSCINST 3540.6, as amended, section 15.2.2, Engineering Operations and Maintenance Manual. The Chief Engineer is to administer the program. Prior to the start of work, the contractor shall contact the USMMIREP and / or the Chief Engineer to coordinate the implementation of the tag-out program for the entire performance period of this item. The prime contractor shall be responsible for compliance by both prime and subcontractor personnel.

6.0  QUALITY ASSURANCE REQUIREMENTS:

6.1  Workmanship shall comply with Standard items 15 & 16

7.0  STATEMENT OF WORK:

7.1  Arrangements/Outfitting:

7.1.1  Provide all material and special equipment. Make all removals and restorations. Remove and replace all interferences, rig and unrig, stage and unstage, make all disassemblies and subsequent reassemblies, provide and operate equipment, and supply all services and assistance to accomplish the following work. (Material, unless specifically stated as Operator Furnished Material (OFM) shall be supplied by the contractor).

7.1.2  Information on the ventilation systems in provided in reference 2.1.1.

7.2  Structural: None

7.3  Mechanical/Fluids:

7.3.1 Perform work as delineated in enclosures 2.2.1 – 2.2.2 with the following

exceptions/addendums:

7.3.1.1 The Contractor shall remove access plates and thoroughly clean the steam heating and chill water cooling coils in all of the fan rooms.

7.3.1.2 The Contractor shall be responsible for creating access plates in order to clean system in its entirety. Access covers shall be installed using machine screws and new gasket material. Affix plastic placards in way of new accesses.

7.3.1.3 Means of cleaning using light dusting, brushes or vacuums. Use of dry ice is not authorized due to insulation is installed on the interior of the duct work.

7.3.2 Allow for renewing 300 sq. ft. of lagging and adhesives with contractor furnished materials.

7.4  Electrical: None

7.5  Electronics: None

7.6  Preparation of Drawings/Documentation: None

7.7  Inspection/Test: None

7.7.1 Tests/Inspections/Reports/Deliverables

7.7.1.1 Report – Motor insulation resistance readings shall be submitted to the Port Engineer as a condition found report.

7.8  Painting:

7.8.1  Mechanically clean, prime and paint all new and disturbed surfaces to match surrounding areas.

7.9  Marking: None additional

7.10 Manufacturer’s Representative: None

8.0  GENERAL REQUIREMENTS: None additional

Standard Item no. 15, revised 2 April 1993 Cleaning Ventilation Systems

All interior surfaces of ventilation systems including ducts, trunks, screens, filters, heaters, and fan casings shall be thoroughly cleaned of all dirt, grease, lint and other foreign matter.

The cleaning of ducts and trunks shall be accomplished by vacuum suction system. All debris resulting from the cleaning operation shall be disposed of in accordance with all federal, state and local environmental regulations. If required, additional cleanout openings may be cut in ducts to facilitate the work. Any such openings shall be fitted with air tight gasket covers of similar thickness to ducts, neatly installed and secured with sheet metal screws.

Remove filters to shop.

Each filter shall be blown clean with compressed air and washed by passing through a circulating hot water type washing machine. The water shall contain an approved washing compound. After drying, each filter shall then be returned to the ship and installed with new gaskets. Replace any defective clips with new of the same type as original. Assume 15% of clips to require replacement.

All frames and landings in way of filters shall be prepared in accordance with steel structure painting council preparation standard, SSPC-SP3. Frames and landing areas shall then be painted with two coats of primer. The second primer coat shall be tinted to assure complete coverage. A top coat is to be applied to match the surrounding area.

Remove and replace all disposable filters with new ones equal to existing. Dispose of removed filters in accordance with applicable federal, state and local environmental laws and regulations.

Renew insulation damaged or removed during performance of work.

All dirt and debris accumulated during the performance of this work shall be removed from the ship daily. Areas worked in or traversed by workmen and equipment shall be cleaned and left in good order.

All new work and disturbed areas in way of the work shall be washed down, primed and painted to conform to adjacent painted areas.

The systems to be dealt with shall be as set forth in the basic specification.

STANDARD ITEM NO. 16, REVISED 2 APRIL 1993

CLEANING VENTILATION FILTER SCREENS

1. Remove designated ventilation screens from installed positions and convey to shop.

2. Each filter screen shall be blown with compressed air and washed by passing through a circulating hot water washing tank containing an approved washing compound.

3. The filter shall then be thoroughly drained and dried.

4. All landings in way of filters shall be prepared in accordance with Steel Structure Painting Council Preparation Standard, SSPC-SP3, Power Tool Cleaning. Landing areas shall then be painted with two coats of primer. The second primer coat shall be tinted to assure complete coverage. A top coat is to be applied to match the surrounding area. Paints shall be MSC approved paint in accordance with the latest revision of COMSCINST 4750.2, Preservation Instructions For MSC Ships.

5. Replace all gaskets. Replace defective clips and bolts with new material equal to the original when new.

6. Return filters to ship and reinstall. Areas involved shall be left clean and in good order.

7. Quantities and locations to be dealt with shall be as set forth in the basic specification.

0803-4