| Tweet |
Custom Search
|
|
|
||
 TB 740-97-4
APPENDIX L
DYNAMIC DEHUMIDIFICATION INSTRUCTIONS FOR
LIGHTER, AMPHIBIOUS: SELF-PROPELLED
DIESEI,, STEEL, 60-TON, 61-FOOT,
(LARC-LX), DESIGN 2303
1. General. This appendix provides detailed instructions for preparation of the amphibious lighter (LARC-LX), design
2030, for dynamic dehumidification.
2. Preparation Instructions. a. Disassembly and Stowage.
(1)
Mooring lines. Remove, coil, and stow in starboard aft wing compartments.
(2)
Boat hook. Stow In clips provided on the after side of cargo well aft bulwark.
(3)
Life preservers. Stow in starboard aft wing compartment.
(4)
Lifting slings. Stow in cargo well.
(5)
Searchlight. Remove, package In a fiberboard box, identify, and stow In the cab.
b. Preparation for Dynamic Dehumidification.
(1) Dehumidified area. The engine compartments, machinery compartments, and the cab will be prepared for
dehumidification.
(2) Provisions for ventilation and air circulation. The engine compartment vent, forward of the operator's cab,
will be removed and stowed m the engine compartment on the starboard side. The resulting opening in the deck will be
covered with a blank fabricated from exterior grade plywood or galvanized sheet metal. The blank will be provided with
holes of suitable size for the introduction of two, Cinch, air ducts, one sensing element, and one electrical fitting for a
humidistat. The manhole access plates in the cargo wells on the port and starboard sides will be removed and stowed in
the engine compartment on the starboard side. The resulting openings will be covered with blanks fabricated from exterior
grade plywood or galvanized sheet metal. The blanks will each be provided with holes of sufficient size for the introduction
of two, 4-inch, air ducts and one sensing element. The starboard engine radiator vent will be removed and stowed In the
engine compartment on the starboard side. The resulting opening will be covered with a blank fabricated from exterior
grade plywood or galvanized sheet metal. The blank will be provided with a hole of sufficient size for the mounting of a
sensing element. The port side, aft end, machinery compartment vent will be removed and stowed in the engine
compartment on the starboard side. The resulting opening will be covered with a blank fabricated galvanized sheets metal.
Strap and plate-type starter housing covers will be secured in other than normal position to permit circulation of air.
(3) Sealing for dehumidification. Methods and materials used in sealing for dehumidification will be in
accordance with this bulletin. Detailed sealing requirements are outlined below:
(a) Hull openings. Pump outlets and fuel tank vents will be sealed with pressure-sensitive tape, strippable
compound, and bituminous coating.
(b)
Exhaust pipes. Exhaust pipes will be plugged and sealed with strippable coating to prevent passage of air.
(c) Dehumidification piping system. The connecting points of all air ducts to areas being dehumidified will be
sealed with strippable coating and bituminous coating. The sealing will be carried over and around flanges, adapters, and
other devices used to attach or introduce the ducts. All joints and seams in the ducts will be similarly sealed.
(d) Miscellaneous sealing. Edges of doors, windows, hatches, hoods, ventilation openings having installed
covers, and all other openings in the nature of seams or joints between closely opposed surfaces will be sealed with
strippable coating and bituminous coating.
(e) Cab. Opening in the cab, caused by removal of the searchlight, will be sealed with pressure-sensitive tape
and strippable coating.
(4)
Installation of dehumidification system.
(a) Dehumidification machines and duct installation.
Two package dehumidifiers, single desiccant bed,
absorbent type, 10,000 cubic foot
Change 2 L-1
|
||
|
||
