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 TB 55-1900-231-15
B. Zone 1 ducting shall be connected in series as shown in Figure B-1 and B-2 and as follows: (Ducting shall be 4"
PVC pipe, pickups shall be 4" flex hose attached with hose clamps. Connect long lengths of ducting with 4' PVC
pipe couplings and support long runs at 10 to 12 foot intervals with suitable bracing. Connect long lengths of flex
hose using 4" PVC pipe nipples and hose clamps.) The pilothouse door, CPO quarters door, crews' quarters
door, deck locker door and pilothouse shelter door shall be closed and dogged. A blank with a dry air inlet and
humid air outlet (4" PVC pipe couplings) shall be installed over the after stbd. outboard pilothouse shelter
window. The sliding window will be secured open or removed and stowed inside the shelter. The voice tube
cover in the pilothouse shelter shall also be secured in the open position. The pickup shall be adjacent to the
pilothouse steering stand. The humid air outlet from the pilothouse shall be piped to a tee which will supply air to
two (2) blanks-one over the crews' mess escape hatch, the other over the crews' quarters escape hatch. The 4"
flex hose pickup from the center engineroom shall be ducted from the blank over the AMR3 access hatch to the
CHT room whose pickup, in turn, will be ducted to the engineers' equipage storeroom blank. The pickup from the
engineers' equipage storeroom shall be ducted to the D/H machine's return by TALS personnel.
Zone 2 ducting shall also be connected in series as shown in Figures B-3 and B-4 and as follows: Wooden
blanks with dry air inlets and humid air outlets (4' PVC pipe couplings) shall be installed over the port and stbd.
equipage room passage openings and over the opening to the general purpose storeroom. Dry air shall be
introduced to the fwd. port equipage storeroom, and the pickup from the after port equipage storeroom's dry air
inlet. The 4' flex hose pickup from the dry provisions storeroom shall be ducted to the dry air inlet of the stbd.
equipage storeroom. The stbd. equipage storeroom's pickup shall be ducted to the D/H machine's humid air
inlet.
C. Sensing Elements: Zone 1 shall have one (1) sensing element located within three (3) feet of the pickup in the
center engineroom, one (1) in the CHT room, and one (1) in the engineers' equipage storeroom. Zone 2 shall
have one (1) sensing element located within three (3) feet of the pickup in the dry provisions storeroom, one (1)
in the port aft equipage storeroom, and one (1) in the stbd. equipage storeroom.
D. Humidistats: The humidistat for Zone 1 shall be located in the center engineroom. For Zone 2, the humidistat
shall be located in the dry provisions storeroom. The humidistats will be set to maintain 40 percent (plus or
minus 5 percent) relative humidity.
E. The wooden blanks that are to be installed over the following openings shall be equipped with simple quick-
acting dogging devices or strongback securing devices. Strips of %" neoprene rubber will be glued to the blanks
to provide a flexible seal between the wood and the hatch or door knife edge: (See Chapter III, Section 4,
paragraph F.)
1.
General purpose storeroom.
2.
Port and stbd. equipage storeroom passage accesses from the well deck.
3.
CHT room.
4.
AMR3, (air compressor room).
5.
Engineer's equipage storeroom.
6.
Pilothouse shelter window.
7.
Crews' mess escape hatch.
8.
Crews' quarters escape hatch.
Any cracks found will be sealed with pressure sensitive tape, glue and strip coat.
F. Stencil the appropriate inlet and outlet wooden blank or adjacent surface with 'DRY AIR" and "HUMID AIR"
respectively for the benefit of those who are to connect the D/H systems.
B-4
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